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In the context of the ongoing digitization of interdisciplinary subjects, the need for digital literacy is increasing in all areas of everyday life. Furthermore, communication between science and society is facing new challenges, not least since the COVID-19 pandemic. In order to deal with these challenges and to provide target-oriented online teaching, new educational concepts for the transfer of knowledge to society are necessary. In the transfer project “Zukunftslabor Gesundheit” (ZLG), a didactic concept for the creation of E-Learning classes was developed. A key factor for the didactic concept is addressing heterogeneous target groups to reach the broadest possible spectrum of participants. The concept has already been used for the creation of the first ZLG E-Learning courses. This article outlines the central elements of the developed didactic concept and addresses the creation of the ZLG courses. The courses created so far appeal to different target groups and convey diverse types of knowledge at different levels of difficulty.
Das Unternehmen "100 Worte Sprachanalyse" hat 2021 den "HR Startup Award" erhalten, der federführend vom Bundesverband der Personalmanager (BPM) verliehen wird. Überzeugt hat 100 Worte "mit dem Versprechen, den unbewussten Gender-Bias in Stellenanzeigen zu reduzieren und unterschiedliche Grundmotive von Bewerbergruppen zu erfassen", so die Initiatoren. Doch es bestehen berechtigte Zweifel daran, dass die Software dieses Versprechen einlösen kann.
Power consumption has become a major design constraint, especially for battery-powered embedded systems. However, the impact of software applications is typically considered in later phases, where both software and hardware parts are close to their finalization. Power-related issues must be detected in early stages to keep the development costs low, satisfy time-to-market, and avoid cost-intensive redesign loops. Moreover, the variety of hardware components, architectures, and communication interfaces make the development of embedded software more challenging. To manage the complexity of software applications, approaches such as model-driven development (MDD) may be used. This article proposes a power-estimation approach in MDD for software application models in early development phases. A unified modeling language (UML) profile is introduced to model power-related properties of hardware components. To determine the impact of software applications, we defined two analysis methods using simulation data and a novel in-the-loop concept. Both methods may be applied at different development stages to determine an energy trace, describing the energy-related behavior of the system. A novel definition of energy bugs is provided to describe power-related misbehavior. We apply our approach to a sensor node example, demonstrate an energy bug detection, and compare the runtime and accuracy of the analysis methods.
Who is more eager to use Gamification in Economic Disciplines? Comparison of Students and Educators
(2022)
Background: In this paper, the focus is on the application of digital and mobile technologies as supporting tools for the implementation of gamification in the field of education of future economists. Objectives: The paper's main objective is to explore whether educators and students are motivated and willing to apply additional technologies as main gamification components in their work and education. Moreover, the paper aims to assess how their more comprehensive application affects the quality of teaching, work flexibility, new learning opportunities, and outcomes. Methods/Approach: The survey method was used to collect answers from educators and students primarily interested in accounting, finance, trade and tourism from higher and secondary education institutions in Croatia, Poland, Serbia and Germany. Afterwards, the responses were compared using statistical methods. Results: Research results confirm that educators and students are willing to use gamification in teaching. Still, they also expressed the need for better administrative support in using particular e-learning tools. Surprisingly, educators are more eager to use gamification in their work than students. Conclusions: The study's general conclusion is that educators and students are both aware of the advantages of using e-learning tools provided through digital and mobile technologies and are eager to implement more gamification in the teaching process. However, continuous education in applying new digital technologies is needed on both sides.
Background
The aim of this qualitative study was to identify a practice level model that could explain a sustained change in nutritional behavior.
Methods
The study used three data inputs from four interviewees, one merged input from a married couple, as narrative interviews. The interviews were analyzed using grounded theory.
Results
Coexistence of a certain suffering and a triggering episode lead to the decision to change nutritional life-style by all interviewed. Maintenance of the self-determined newly learned nutritional behavior was supported by subject-related intrinsic motivation, the ability to reflect, and a low expectation of success from the behavioral change. Environment-related factors were identified as support from life-partner and peers. Subjects reported that the sustained nutritional behavior change impacted their holistic health through subject-perceived improved life quality, increase in the number of social contacts, and a change in personal attitudes and perception. The analysis remains limited, and at best hypothesis generating, in that only three data inputs from four interviewees were used.
Conclusion
In this hypothesis-generating narrative interview study of four study subjects, volition, personal decision making, and long-term motivation (though not external determination) seemed to sustain a change in newly learned nutritional behavior.
Das Business Model Canvas erfreut sich in der Praxis großer Beliebtheit. Esunterstützt bei der Entwicklung von innovativen Geschäftsmodellen beiNeugründung, kann aber auch zur Evaluation bestehender Geschäftsmodelleeingesetzt werden. Durch das Business Model Canvas ist esmöglich, dieSchlüsselfaktoren eines Geschäftsmodells auf intuitive Weise strukturiert zuvisualisieren. Der vorliegende Beitrag erläutert das Business Model Canvasund nimmt eine kritische Würdigung vor.
Hintergrund
Schmerz hat einen entscheidenden Einfluss auf die humane Lebensqualität. Allein eine Wissensvergrößerung über neurobiologische Vorgänge kann das subjektive Schmerzempfinden sowie psychometrische Variablen positiv beeinflussen. Es gibt verschiedene Formen der präoperativen Patientenedukation, welche u. a. zum Ziel haben, den postoperativen Schmerz zu erklären. Laut der aktuellen Literatur liegt einer präoperativen biomedizinischen Edukation eine geringe Evidenz zugrunde. Sie kann das präoperative Angst- und Stresslevel der Patienten steigern, was sich negativ auf das postoperative Outcome auswirkt. Im Gegensatz zur biomedizinischen Edukation betrachtet das neurobiologische Verständnis den postoperativen Schmerz unter den Gesichtspunkten der Plastizität des Nervensystems und bezieht Sensibilisierungsprozesse im zentralen und peripheren Nervensystem mit ein.
Ziel
Systematische Untersuchung von Kurz- und Langzeiteffekten einer neurobiologischen (Schmerz‑)Edukation bei Patienten vor einer Wirbelsäulenoperation
Material und Methoden
Bei der Literaturrecherche wurde nach dem PI(C)O(Population Intervention Comparison Outcome)‑Schema in den medizinischen Datenbanken gesucht. 83 Artikel kamen in die engere Auswahl. Entsprechend den Ein- und Ausschlusskriterien konnten letztendlich neun Artikel eingeschlossen werden.
Ergebnisse
Durch eine präoperative neurobiologische (Schmerz‑)Edukation können postoperative Katastrophisierungstendenzen sowie die postoperative Kinesiophobie positiv beeinflusst werden. Keinen Einfluss hat eine präoperative neurobiologische Edukation auf postoperativen Schmerz und Funktion. Inkonsistenz besteht bislang in der Herangehensweise der PNE (Pain Neuroscience Education).
Schlussfolgerung
Eine präoperative Reduktion von Angst und schmerzaufrechterhaltenden Faktoren v. a. auf psychologischer und sozialer Ebene hat einen positiven Effekt auf die postoperative subjektive Schmerzbewertung, was sich in einer Reduktion von Angst, Katastrophisierungstendenzen und einer geringeren Inanspruchnahme von postoperativen Leistungen im Gesundheitswesen widerspiegelt.
A systematic study was performed to understand the effects of the devulcanizing agent dibenzamido diphenyl disulfide (DBD) on the vulcanization and devulcanization process of a sulfur-cured ethylene-propylene-diene monomer (EPDM) rubber. The influence of DBD on vulcanization was investigated by mixing DBD with virgin rubber and curative system. The devulcanization of rubber waste was achieved with varying amounts of DBD ranging from 0.4 to 13.8 wt% and temperatures from 150 to 200°C. The quality of vulcanizates and devulcanizates was evaluated by rheometer tests, temperature scanning stress relaxation measurements, and analysis of mechanical properties. During vulcanization, DBD acts as an accelerator in the presence of sulfur. When accelerators are added, the scorch time increases, and the cure rate decreases. Thus, DBD acts as a retarder. In the presence of activators, DBD leads to a significant reduction of crosslink density. This results in composites with high elongation at break and poor compression set values. The efficiency of the devulcanization of rubber waste depends strongly on DBD concentration and temperature. The monosulfidic crosslinks are cleaved by low concentrations of DBD, while polysulfidic crosslinks require higher concentrations. These results show that DBD is effective as a devulcanizing agent and degrades the network below 200°C.
One challenge of the EU energy transition is the integration of renewable electricity generation in the distribution system. EU energy law proposes a possible solution by introducing “citizen energy communities” (Directive 2019/944/EU) which may be open for “cross-border participation”. This article proposes an innovative way of implementing such cross-border communities by linking distribution systems via a “switchable element”, a generation, storage, or consumption asset with a connection to each country. An optimization model has been developed to calculate the system cost savings of such a connection. Linking regions with complementary characteristics regarding electricity generation and demand via a switchable element leads to more efficient system utilization. Findings are relevant for the transposition of “citizen energy communities” in national laws.
Obwohl sich die Anforderungen im Sport und dem Musizieren ähneln, ist die Musikerphysiotherapie längst nicht so entwickelt wie die Sportphysiotherapie. Dabei lassen sich die sogenannten „Performance-Related Musculoskeletal Disorders“ erfolgreich mit Manueller Therapie oder Physiotherapie, z. B. mit Hilfe einer Bewegungsanalyse, therapieren. Prof. Dr. med. Christoff Zalpour gibt einen Überblick über das Feld der Musikerphysiotherapie, deren Potenzial noch lange nicht vollends erschlossen ist.
Die Anforderungen an zukünftige Teilnehmende eines Arbeitsmarktes verändern sich. Das von Frithjof Bergmann begründete Prinzip der Neuen Arbeit (Bergmann, 2004) ist aktuell Gegenstand zahlreicher Diskussionen und Debatten über aktuelle und zukünftige Arbeitswelten. Die sich daraus ergebenden Kompetenzanforderungen passen mit der Lehre in Hochschulen wenig zusammen. Zunehmend werden agile Lernszenarien diskutiert.
Das Inverted Classroom Modell (ICM) erfreut sich seit einigen Jahren großer Beliebtheit in der Hochschullehre. Aus Studierendensicht ist die Teilnahme an einer ICM-Veranstaltung aber eine Herausforderung. Für ein erfolgreiches Lernen sind insbesondere personale Kompetenzen wie Selbstmotivation, Durchhaltevermögen und Selbstregulationskompetenz erforderlich (Pöpel & Morisse, 2019). Um diesem Umstand entgegenzuwirken, wurde vom Autor ICM mit Ideen aus Scrum für eine Informatik-Lehrveranstaltung kombiniert (siehe auch (Morisse & Heidemann, 2021)). Die Wirkung von Scrum kann sich nur entfalten, wenn die Arbeit in einzelne Sprints aufgeteilt wird und bei der Bearbeitung der Sprints auch die eigene Zusammenarbeit im Rahmen einer Retrospektive kritisch reflektiert wird. Zu diesem Zweck wird der gesamte Inhalt der Lehrveranstaltung in eine Anzahl von thematischen Blöcken aufgeteilt, die als Lehr- und Lerninhalte für die Lern-Sprints der Scrum-Umsetzung werden. Für jeden Themenblock müssen die theoretischen Inhalte erarbeitet sowie eine eigenständige Zusammenfassung formuliert werden. Ergänzend dazu wurde ein Software-Produkt definiert, in dessen Rahmen die theoretischen Inhalte einfließen konnten.
Die Durchführung eines Reviews und einer Retrospektive schließen bei Scrum einen Sprint ab. Genau dies lässt sich auch im Hochschulkontext sehr gut als Feedback-Instrument durchführen. Das Review bestand in der Inspektion der entwickelten Software. Mit der Retrospektive wird die eigene Zusammenarbeit im Team kritisch reflektiert. Ein besonderes Augenmerk verdient der kommunikative Stil zwischen Lehrenden und Studierenden. Bei einem Veranstaltungskonzept, welches getragen wird von Interaktion und Diskussion, kommt einer empathischen und wertschätzenden Kommunikation eine besondere Bedeutung zu. Das dies in der vorgestellten Veranstaltung scheinbar gelungen ist, zeigt das Zitat eines der teilnehmenden Studierenden „Ich freue mich immer auf die Review-Termine“. Zur Erinnerung: Das Review ist der Termin zur Vorstellung des erreichten Ergebnisses, also eher ein Prüfungs-Setting, bei dem Studierende ihre Arbeit präsentieren. Weitere positive Resonanzmerkmale durch die Studierenden waren die hoffnungsvollen Fragen, ob denn die Veranstaltungen im kommenden Semester auch nach ICMScrum organisiert sind.
The increasing diversity of cultural backgrounds offers potential for a more elaborated information processing, yet has been shown to be challenging for individuals, due to intergroup hostility, prejudices, and difficulties of intercultural communication. Current research thus focusses on the interaction of employees with different cultural heritages, as well as on their intergroup attitudes and competences. Thereby, leaders have been shown to shape the way diversity is considered in their teams in a top-down process. However, their perception of diversity as well as related challenges and chances are poorly investigated. The current paper thus aims to contribute to the understanding of leader’s perspective on and role in diversity-management by building on a comparative qualitative study with sixteen employees and twenty-two leaders. Research questions are how employees and leaders perceive cultural diversity from their specific point of view, which experiences are likely to contribute to their opinion on and perception of diversity and in how far do employees and leaders differ in these aspects. The results show that employees are aware of the topic of diversity in general but have poor competences in dealing with diversity in their daily working life. This seems to be associated with lack of experience with intercultural interaction and a lack of support from the respective organizations/leaders. Leaders are rarely aware of this lack of support. The results indicate that leaders’ experiences with cultural and age diversity, their identification with the company and previous diversity measures in the context of the companies’ policy towards diversity seem to be relevant for the formation of leaders’ attitudes. As a consequence, most participants focus on the question whether they do or do not want diversity within their teams and companies, while they actually fail to perceive the diversity that is already there.
Oleamide is used as a lubricant in the manufacturing and application of polypropylene (PP) medical devices. Samples of PP were prepared with 0, 1500, and 15 000 ppm oleamide content as lubricant. The samples were either left non-sterile, sterilized with ethylene oxide (ETO), γ-radiation (γ) or autoclaved (A) and stored for up to 4 weeks. To determine the oleamide bulk-to-surface distribution depending on sterilization method and storage time an extraction method and a washing technique were applied. The oleamide content was determined by gas chromatography (GC-FID) and compared with the coefficient of friction (COF). The COF dependent on the measured lubricant content at the surface. The content of lubricant on the surface depends on the type of sterilization: ETO increased the lubricant content to some extent, γ-sterilization and autoclaving reduced it. After storage, no migration of the lubricant to the surface could be detected.
Farmland bird populations are in a deep crisis across Europe. Agri-environment schemes (AES) were implemented by the European Union to stop and reverse the general decline of biodiversity in agricultural landscapes. In Germany, flower strips are one of the most common AES. Establishing high-quality perennial wildflower strips (WFS) with species-rich native forb mixtures from regional seed propagation is a recent approach, for which the effectiveness for birds has not yet been sufficiently studied. We surveyed breeding birds and vegetation on 40 arable fields with WFS (20 with single and 20 with aggregated WFS) and 20 arable fields lacking WFS as controls across Saxony-Anhalt (Germany). Additionally, vegetation composition, WFS quantity and landscape structure (e.g. distance to nearest woody element) were considered in our analyses. All WFS were established with species-rich native seed mixtures (30 forbs) in agricultural practice as AES. Arable fields with WFS had a higher species richness and territory density of birds than controls, confirming the effectiveness of this AES. A forb-rich vegetation was the main driver promoting birds. Flower strip quantity at the landscape level had positive effects only on bird densities, but also single WFS achieved benefits. A short distance from WFS to woody elements increased total bird species richness. However, the density of farmland birds, which are target species of these AES, were negatively affected by the proximity and proportion of woody elements in the vicinity. The effect of the proportion of non-intensively used open habitats and overall habitat richness was unexpectedly low in the otherwise intensively farmed landscape. Species-rich perennial WFS significantly promoted breeding birds. Successful establishment of WFS, resulting in high-quality habitats, a high flower strip quantity as well as implementation in open landscapes were shown to maximise the effectiveness for restoring declining and AES target farmland birds.
Adventitious root (AR) formation is the basis of vegetative propagation in rose, be it via stem cuttings or via stenting. During this process, wounding plays a pivotal role since cell reprogramming takes place at the tissue adjacent to the wound. We investigated the effects of wounding on AR formation on leafy single-node stem cuttings of the rose rootstock R. canina ‘Pfänder’ (codes R02-3 and R02-6) and the cut rose cultivar Rosa ‘Tan09283’ (Registration name ‘Beluga’). Laser wounding treatments were based on the assisted removal of tissue layers located in the bark. The positioning of wounding was studied based on two marking directions: along the cutting base (strip pattern) and around the cutting base (ring pattern). Additionally, the effects of external supply of indole-butyric acid (IBA 1 mg L-1) on rootingwere analyzed. Results showedthat inorder toremovespecific tissue layers, the calculation of the laser energy density (J cm-2) in terms of cutting diameter was necessary. Interestingly, the application of energy densities from 2.5 J cm-2 up to approximately 8.5 J cm-2 were sufficient to expose the tissue layers of epidermis up to regions of phloem. Regarding AR formation for R. canina ‘Pfänder’, characterized by a low rooting response, an increase in the rooting percentage was registered when the laser treatment eliminated the tissue up to phloem proximities. Analysis of the nodal position showed that bud location was a preferential place for AR formation independently of wounding treatment. In case of Rosa ‘Tan09283’, laser treatments did not reduce its high rooting capacity, but an apparent reduction in rooting quality due to an investment in tissue healing was observed when wounding reached deeper layers such as parenchyma and sclerenchyma. Results also showeda strongARformation directly fromwounded regions in case of Rosa ‘Tan09283’ specifically when the woundwas located below the axillary bud. In conclusion, wounding by assisted-elimination of layers by laser can induce positive effects on AR formation of single-node stemcuttings of the rose if energy applied is able to expose phloemproximities,a longitudinalorientation, and relative position to the axillary bud are considered.
In open-field vegetable production, high quantities of soil mineral nitrogen (Nmin) and N-rich crop residues often remain in the field at harvest. After the harvest of crops in autumn, this N can lead to considerable nitrate (NO3−) losses during the subsequent winter leaching period. In four field trials, different tillage depths (3–4, 10, 30 cm) and dates (early autumn, late autumn, early spring) were investigated to reduce N losses after growing spinach in the autumn. In a further treatment, the nitrification inhibitor 3,4-Dimethylpyrazole phosphate (DMPP) was directly applied to the crop residues. Potential N losses were calculated by a balance sheet approach based on Nmin concentration (0–90 cm), measured N mineralization and N uptake by catch crops. By postponing the tillage date from early to late autumn or spring, resprouting spinach stubbles acted as a catch crop, reducing N losses by up to 61 kg ha−1. However, if the spinach biomass collapsed, the N losses increased by up to 33 kg ha−1 even without tillage. The application of DMPP as well as the tillage depth were less effective. Overall, postponing tillage to spring seems to be the most promising approach for reducing N losses during the off-season.
Hintergrund: Die Digitalisierung durchdringt mittlerweile alle Bereiche unseres Lebens und zunehmend auch das Handlungsfeld der Pflege. Mithilfe medial gestützter Lehrgestaltung können Lernende auf digitale Herausforderungen ihres Berufsalltags vorbereitet werden. Zudem müssen Pflegende über ein individuell und fallbezogen anwendbares Fachwissen verfügen, welches mittels des Konzeptes der hermeneutischen Fallarbeit vermittelt wird. Virtuelle Simulationen können authentische Fallszenarien darstellen und das konventionelle Konzept der Fallarbeit mit moderner Technik erweitern.
Ziel: Ziel der Recherche ist, national und international verwendete Arten digitaler und virtueller Medien in Verbindung mit der Methode der hermeneutischen Fallarbeit im Kontext der Gesundheitsbildung zu identifizieren und dessen Nutzen zu beschreiben.
Methoden: Es ist eine Literaturrecherche im Design eines systematischen Reviews in den Datenbanken CINAHL, MEDLINE via PubMed, Cochrane und Springer Link durchgeführt und mit dem Schneeballprinzip ergänzt worden.
Ergebnisse: Es wurden elf Publikationen eingeschlossen. Die Ergebnisse zeigen überwiegend positive Auswirkungen, die sich in elf Kategorien unterteilen lassen. Schlussfolgerung: Der Einsatz von virtuellen Patient_innen wird auch in der empirischen und mediendidaktischen
Forschung als ein effektives und effizientes Lernarrangement angesehen. Sowohl im positiven wie auch negativen Sinne, sind die Ergebnisse abhängig von der didaktisch-methodischen Aufarbeitung, dem Design der Lernmodule und der Qualität des Mediums wie auch der Lehre.
Freshwater ecosystems host disproportionately high numbers of species relative to their surface area yet are poorly protected globally. We used data on the distribution of 1631 species of aquatic plant, mollusc, odonate and fish in 18,816 river and lake catchments in Europe to establish spatial conservation priorities based on the occurrence of threatened, rangerestricted and endemic species using the Marxan systematic conservation planning tool. We found that priorities were highest for rivers and ancient lakes in S Europe, large rivers and lakes in E and N Europe, smaller lakes in NW Europe and karst/limestone areas in the Balkans, S France and central Europe. The a priori inclusion of well-protected catchments resulted in geographically more balanced priorities and better coverage of threatened (critically endangered, endangered and vulnerable) species. The a priori exclusion of well-protected catchments showed that priority areas that need further conservation interventions are in S and E Europe. We developed three ways to evaluate the correspondence between conservation priority and current protection by assessing whether a cathment has more (or less) priority given its protection level relative to all other catchments. Each method found that priority relative to protection was high in S and E Europe and generally low in NW Europe. The inclusion of hydrological connectivity had little influence on these patterns but decreased the coverage of threatened species, indicating a trade-off between connectivity and conservation of threatened species. Our results suggest that catchments in S and E Europe need urgent conservation attention (protected areas, restoration, management, species protection) in the face of imminent threats such as river regulation, dam construction, hydropower development and climate change. Our study presents continental-scale conservation priorities for freshwater ecosystems in ecologically meaningful planning units and will thus be important in freshwater biodiversity conservation policy and practice, and water management in Europe.
The energy transition can be mapped on four levels. While industry and the state should act on the national and international level, most of the energy transition is taking place at the regional and municipal levels. Here the small-scale and decentralized nature of the new energy world is reflected, where customized individual solutions are created.
Information systems (IS) play a central role in promoting corporate sustainability and pro-environmental behavior. This study explores the use of mobile apps for fostering sustainability-oriented corporate culture. It accentuates issues relating to sustainability-oriented corporate culture (RQ1), app meta-requirements as a strategic approach to addressing these issues (RQ2), as well as design and implementation principles (RQ3). Referring to the literature on sustainability apps, gamification, and nudging, our qualitative research design combines an analysis of four corporate apps intending to promote sustainable behavior and expert interviews (Grounded Theory). The proposed framework supports the planning, realization, and monitoring of this targeted app use. Single cultural dimensions inform seven issues in culture development. Five meta-requirements address this multi-dimensionality, challenges provided by new digital working environments, and principles of Green IT. Four design principles support, extend, and integrate current knowledge on app features, nudging, and gamification. Five variables determine the app intervention and maturity level. We conclude that this targeted app use should intend to foster the sustainability orientation within all dimensions of corporate culture instead of being limited to promoting sustainable behavior.
Der vorliegende Beitrag fokussiert die Bedeutung Nachhaltigkeitsorientierter Unternehmenskultur für den Einsatz von künstlicher Intelligenz im Marketing. Spezifischer skizzieren wir die Einflussmöglichkeiten auf den Einsatz nachhaltiger künstlicher Intelligenz zur Förderung des Sustainable Development Goals 12 (Nachhaltige/r Produktion & Konsum). In einem diskursiven Ansatz führt dieser Beitrag Erkenntnisse aus der Literatur zur nachhaltigkeitsorientierten Unternehmenskultur, nachhaltigen künstlicher Intelligenz und dem Nachhaltigkeitsmarketing zusammen und bildet diese mithilfe des St. Galler Managementmodells ab.
Das Ziel des Beitrags ist es, die Bedeutung von aktiven Kundinnen und Kunden für ein unterstützendes Marketing Management hin zu einer nachhaltigen Entwicklung am Beispiel der Energiewirtschaft aufzuzeigen. Das Menschenbild des homo sustinens kann von besonderer Relevanz sein, um aktive Kundinnen und Kunden im Marketing Management zu verstehen. Dem homo sustinens zugrundeliegend, der sich am Leitbild der Nachhaltigkeit orientiert, ergeben sich vielfältige Ansatzpunkte für den Austauschprozess mit aktiven Kundinnen und Kunden. Sie können befähigt, instrumentalisiert, unterstützt, erzogen oder optimiert werden.
Duckweeds are fast-growing and nutritious plants, which are gaining increased attention in different fields of application. Especially for animal nutrition, alternative protein sources are needed to substitute soybean meal. The current bottleneck is the standardized production of biomass, which yields stable quantities of a defined product quality. To solve this problem, an indoor vertical farm (IVF) for duckweed biomass production was developed. It consists of nine vertically stacked basins with a total production area of 25.5 m2. The nutrient solution, a modified N-medium, re-circulated within the IVF with a maximum flow rate of 10 L min−1. Nutrients were automatically added based on electrical conductivity. In contrast, ammonium was continuously supplied. A water temperature of 23 °C and a light intensity of 105 μmol m−2 s−1 with a photoperiod of 12:12 h were applied. During a 40-day production phase, a total of 35.6 kg of fresh duckweed biomass (equals 2.1 kg of dried product) was harvested from the IVF. On average, 0.9 kg day−1 of fresh biomass was produced. The dried product contained 32% crude protein (CP) and high levels of proteinogenic amino acids (e.g. lysine: 5.42 g, threonine: 3.85 g and leucine: 7.59 g/100 g CP). Biomass of this quality could be used as a protein feed alternative to soybean meal. The described IVF represents a modular model system for duckweed biomass production in a controlled environment and further innovations and upscaling processes.
25-hydroxycholecalciferol (25-OHD3) formed via hepatic hydroxylation from vitamin D, cholecalciferol, represents the precursor of the biologically active vitamin D hormone, 1,25-dihydroxyvitamin D. Due to a higher absorption rate and the omission of one hydroxylation, dietary supplementation of 25-OHD3 instead of vitamin D3 is considered to be more efficient as plasma concentrations of 25-OHD3 are increased more pronounced. The present review summarises studies investigating potential beneficial effects on mineral homeostasis, bone metabolism, health status and performance in sows, piglets and fattening pigs. Results are inconsistent. While most studies could not demonstrate any or only a slight impact of partial or total replacement of vitamin D3 by 25-OHD3, some experiments indicated that 25-OHD3 might alter physiological processes when animals are challenged, for example, by a restricted mineral supply.
To investigate the influence of two dietary sources of vitamin D on the vitamin D status, bone metabolism, welfare and birth progress of gestating and lactating sows, forty-nine multiparous sows were randomly assigned to one of two diets: “CON” (n = 25; 50 μg vitamin D3/kg feed) and “HYD” (n = 24; 50 μg 25-hydroxycholecalciferol/kg feed). The basal diets were protein- and phosphorus-reduced. The trial started on day 3 ante insemination of the sows and ended with weaning of the piglets on day 28 postpartum. Dietary supplementation of 25-hydroxycholecalciferol resulted in improved maternal vitamin D status (p < 0.001), fewer gait changes (p < 0.01) and longer standing time after feeding (day 5 ante partum; p < 0.05) compared to vitamin D3. However, the bone markers CrossLaps and osteocalcin were not affected. Overall, the present results suggest that sows fed 25-hydroxycholecalciferol instead of vitamin D3 showed improved locomotion and stance strength. However, this outcome is probably not related to altered bone metabolism. The underlying mechanisms must be investigated in further studies.
Duckweeds can be potentially used in human and animal nutrition, biotechnology or wastewater treatment. To cultivate large quantities of a defined product quality, a standardized production process is needed. A small-scale, re-circulating indoor vertical farm (IVF) with artificial lighting and a nutrient control and dosing system was used for this purpose. The influence of different light intensities (50, 100 and 150 µmol m−2 s−1) and spectral distributions (red/blue ratios: 70/30, 50/50 and 30/70%) on relative growth rate (RGR), crude protein content (CPC), relative protein yield (RPY) and chlorophyll a of the duckweed species Lemna minor and Wolffiella hyalina were investigated. Increasing light intensity increased RGR (by 67% and 76%) and RPY (by 50% and 89%) and decreased chlorophyll a (by 27% and 32%) for L. minor and W. hyalina, respectively. The spectral distributions had no significant impact on any investigated parameter. Wolffiella hyalina achieved higher values in all investigated parameters compared to L. minor. This investigation proved the successful cultivation of duckweed in a small-scale, re-circulating IVF with artificial lighting.
Complete diets for laying hens are usually offered in meal form. This form initially promotes the laying hens’ natural feed intake behavior and allows them to satisfy their pecking behavior. At the same time, it can also cause difficulties, because it consists of different particles and is not a homogeneous unit. A homogeneous mixture is essential to ensure that each laying hen in the flock can meet its nutritional needs. If feed exhibits a wide particle size distribution, this can promote feed segregation during transport and selective feed intake behavior of laying hens. These two processes sometimes lead to significant differences between the composition of the feed produced and the composition of the feed that is finally ingested by the laying hens. Multi-stage sampling can be used to investigate progressing differences in feed composition. In this study, samples of different complete diets for laying hens (n = 76) were collected from ten organic farms in Germany to examine their particle size distributions (dry sieve analysis). Samples were taken at four different locations (V1 = loading, V2 = silo, V3 = at the beginning of the feed chain, V4 = at the end of the feed chain) in each farm. There was a tendency for V1 and V2 to be characterized by high proportions of particles between 1400 and 3150 µm (V1 = 61.2%, V2 = 43.5%). V3 and V4 consisted mainly of particles of size 500–800 µm and 200–400 µm, respectively. The lowest proportions across all variants were in the range above 3150 µm (V1 = 2.20%, V2 = 1.30%, V3 = 1.00%, V4 = 0.400%) and between 400 and 500 µm (V1 = 2.50%, V2 = 4.50%, V3 = 5.70%, V4 = 6.60%). The mean value comparison of the proportions of sieve mesh sizes from 200 to 1000 µm resulted in: V1 < V2 < V3 < V4; and of sieve mesh sizes between 1400 and 2000 µm in: V1 > V2 > V3 > V4. This observation can be explained by segregation of the feed during transport and a selective feeding behavior of the laying hens. However, trends were discontinuous and varied between the farms. Deviations from the guideline values were found in particular for particle sizes in the range of 1000 to 1400 µm.
Wieviel Wasser säuft die Sau
(2022)
A project was initiated to apply dietary CP reduction under commercial conditions. The main objective was to demonstrate and validate that dietary CP can be reduced without compromising broiler performance in a production system which is already rather efficient. In addition, we wanted to demonstrate the potential of dietary CP reduction on reducing N-excretions especially in the context of German revised regulations and monitoring attempts. Finally, as previous research suggested, few further aspects such as impact of dietary CP reduction on litter quality and quantity, footpad health, change of ingredient inclusion levels and related impact on sustainability impact factors were evaluated.
Background
Citizen energy cooperatives (CECOs) are an important element for realising the transformation of the European energy system from a central system, dominated by a few market players to a decentralized system with the participation of many citizens, in which energy supply is largely based on renewable energy sources. This article identifies success factors that ensure a working organization that is capable of implementing projects to support the energy transition and improving the well-being of citizens.
Methods
The aim of this study is to identify success factors using the example of CECOs in north western Germany through a two-step process. The first step is a literature review to identify success factors of CECOs. Second, 12 semi-structured expert interviews with managers of CECOs are conducted and evaluated by means of a qualitative content analysis. The interviews identified the success factors and barriers of CECOs. The interviews were recorded and transcribed verbatim. The coding process was carried out using a qualitative data analysis software (ATLAS.ti 8.4.5,).
Results
The results show that three factors particular should be present, but can influence each other, to lead to successful CECOs: (1) the CECOs require business models with low complexity, as business models that span different stages of the value chain can overwhelm organizational managers. (2) Committed key individuals must be found and promoted. They need the support of the members. (3) Social and ecological principles are the core values of CECOs. The maintenance and strengthening of social–ecological credibility must be promoted in the public perception.
Conclusions
The results show that CECOs emerge from a strong social cohesion in a society. In addition, local "key individuals" need to be identified and supported. To this end, the framework conditions (e.g., policy, legislation, municipal support, etc.) must be adapted in such a way that these "key individuals" in CECOs are not overburdened. The analysis of the interviews also revealed that political or regulatory barriers are often cited as obstacles to the implementation of community energy projects.
Flexibility in planning through frequent amendments. The practice of land use planning in Germany
(2022)
How can formal planning deal with uncertainty and rapid change while maintaining high standards of procedural certainty? This paper, using Germany as an example, examines how municipalities handle this dilemma within their existing planning systems. Municipalities use different approaches, ranging from regular redrafting to comprehensive changes or regular amendments. Amendments and complementary informal plans are important components of flexibility in planning. We argue that the choice to make frequent amendments instead of redrafting the preparatory land-use plan does not necessarily lead to a loss of a city-wide, long-term perspective, provided amendments are prepared and justified using informal concepts.
Shredlage für Masttiere?
(2022)
Mehr Tränken bei Hitze
(2022)
Braune Brühe, was tun?
(2022)
Kotwasser beim Pferd
(2022)
Over the past decade, the proliferation of entrepreneurial ventures and small firms with sustainable business models have pushed the sustainability agenda in the fashion industry. Despite prominent success stories, these companies often encounter significant operative challenges that hinder growth or even cause business failure. This paper adopts a qualitative research design and uses data gathered during 18 expert interviews with entrepreneurs and executive managers of 18 firms from 13 countries to identify and explore the dominant challenges that micro- and small-sized sustainable fashion companies struggle with. The results indicate that communicating with consumers is perceived as surprisingly difficult, especially because sustainable brands need to justify higher prices and explain the added benefits of their products. Second, resource constraints lead to operative friction and overburdening of the decision makers and their small management teams. Third, sustainable sourcing and production processes are economically difficult in an industry that continues to occupy a mass and low-cost logic. Against the background of these insights, a range of managerial recommendations are developed and contextualized in the framework of the Business Model Canvas. This novel approach makes the suggestions which are rooted in the resource-based view actionable and supports sustainable businesses to better manage their operations and achieve growth. For example, collaborative approaches with different stakeholders may mitigate constraints across all three identified problem areas.
Applications of pulsed electric fields for processing potatoes: Examples and equipment design
(2022)
In the last two decades, pulsed electric fields (PEF) have successfully been introduced into the food industry, as one of the most promising and "game changing" technologies. This review is devoted to the recent applications of pulsed electric fields used in processing potatoes. The potato processing market size was estimated to be ca. USD 24.83 billion (2018) and with an annual growth rate of 5.2%. The physicochemical characteristics of potatoes and the specificity of potato processing lines makes a pulsed electric field very versatile and flexible allowing one to achieve different technological aims by its implementation into technological lines. In this paper, a short analysis of the potato structure and its nutritional properties, applications of moderate electric fields, ohmic heating, and pulsed electric fields are presented. Moreover, the basic electroporation effects, metabolic responses, texture modification and different PEF assisted processes applied to the potato are discussed. Finally, some examples of commercial applications and a brief description of the available equipment for the PEF processing of potatoes are presented.
Повышение эффективности снятия покровной ткани с плодов томата импульсным электрическим полем
(2022)
Electrophysical technologies are a global trend of sustainable agriculture and food industry. Peeling is an energy-intensive procedure of fruit and vegetable processing. The research featured the effect of pulsed electric field (PEF) treatment on tomato peeling effectiveness. The assessment included such factors as specific effort, energy costs, and product losses in comparison with thermal and electrophysical methods. Tomatoes of Aurora variety underwent a PEF treatment at 1 kV/cm. The expended specific energy was 1, 5, and 10 kJ/kg. The tomatoes were visually evaluated with optical microscopy before and after processing. The peeling effectiveness and mass loss were measured with a texture analyzer and digital scales. The PEF treatment decreased the specific force of mechanical peel removal by 10% (P < 0.05). The mass loss decreased by 4% (P < 0.05) at 1 kJ/kg. The PEF method resulted in cell electroporation, which activated the internal mass transfer of moisture from the endocarp region between the mesocarp and the integumentary tissue. The hydrostatic pressure produced a layer of liquid, which facilitated the peeling. In comparison with thermal treatment (blanching), ohmic heating, and ultrasonic processing, the PEF technology had the lowest production losses and energy costs. The research proves the prospects of the PEF treatment in commercial tomato processing.
The impact of Pulsed Electric Field (PEF) processing pre-treatment on the texture and kinetics of in vitro starch digestibility of French fries made from two potato cultivars (Solanum tuberosum L.) containing dry matter content ranging from 19 to 22% was investigated. Whole and steam-peeled potato tubers were treated with a pilot scale PEF unit (electric field strength of 1.1 and 1.9 kV/cm with energy input <10 kJ/kg or ∼50 kJ/kg). This trial was carried out in a commercial French-fry plant using an industrial scale cutter, blancher, fryer and blast-freezer to prepare the frozen par-fried French fry samples. After subsequent final batch frying of the frozen fries, at 180 °C for 3 min to mimic the typical preparation practice at restaurant, retail and household, the outer crust of the fries produced from PEF-treated potatoes was significantly harder (9.4–16.3 N) than crust produced from untreated potatoes (6.9–8.5 N). High intensity (1.9 kV/cm with energy input ∼50 kJ/kg) PEF processing was found to cause defects (i.e. hollowness in the internal core) in the fries. A fractional conversion model was a good fit for the starch digestion kinetics of all French fry samples during the small intestinal phase (based on standardised INFOGEST static in vitro digestion assay). A lower % of total starch hydrolysis was predicted for French fries produced from high dry matter (>21%) tubers pretreated with PEF at electric field strength of 1.9 kV/cm. The findings generated in this study demonstrate PEF pretreatment may influence the texture of French fries and the extent of starch digestion that occurs.
The impact of pulsed light (PL) treatment on naturally occurring microorganisms, mycotoxins, and on physicochemical properties in red pepper powder was investigated. Powder samples were exposed to different PL treatments up to 61 pulses, with fluence ranging from 1.0 to 9.1 J/cm2. The highest fluence applied (9.1 J/cm2, 61 pulses, 20 s) resulted in 2.7, 3.1, and 4.1 log CFU/g reduction of yeasts, molds, and total plate counts (TPC), where initial microbial loads were 4.6, 5.5, and 6.5 log CFU/g, respectively. At the same fluence intensity, a maximum reduction of 67.2, 50.9, and 36.9% of aflatoxin B1 (AFB1), total aflatoxins (AF), and ochratoxin A (OTA) were detected, respectively. Proportional increase in temperature of the samples was observed from the absorbed PL energy, reaching maximum of 59.8°C. The inactivation of investigated microorganisms and mycotoxins followed first-order kinetics (R2 > 0.95). The fluence intensity at 6.9 and 9.1 J/cm2 did not cause degradation, but rather a significant (p < .05) and apparent increase of total phenols. Total color difference (ΔE*) revealed only “slight differences,” compared to the untreated sample. In conclusion, higher reduction of microbial load and mycotoxins in red pepper powder could be achieved, when higher treatment intensity was applied. This suggests the PL as a potential technology for decontamination of red pepper powder and other spice powders.
Die Verschwendung von Lebensmitteln im Haushalt wird durch eine komplexe Reihe von routinemäßigen Verhaltensweisen bestimmt, und eine Unterbrechung dieser Routinen könnte zu einer Verringerung dieser enormen Menge an Lebensmittelabfällen führen. In der vorliegenden Studie wird eine solche Unterbrechung der Haushaltsroutinen untersucht: die Essensbox.
Das Potenzial von Essensboxen zur Verringerung verschiedener Arten von Lebensmittelabfällen in Haushalten wird zum ersten Mal in verschiedenen Ländern untersucht. Nachdem wir einen Rahmen für den Vergleich der Auswirkungen verschiedener Mahlzeitentypen auf die Lebensmittelverschwendung geschaffen haben, untersuchen wir anschließend die Auswirkungen einer abonnementbasierten Lebensmittelversorgung (d. h. Mahlzeitendosen) auf die gesamte Lebensmittelverschwendung sowie auf die verschiedenen Arten der Lebensmittelverschwendung: Zubereitung, Kochen und Tellerabfälle. Unser Datensatz enthält 8747 Beobachtungen von Mahlzeiten aus 955 Haushalten in sechs Ländern. Die Ergebnisse eines Bayes'schen Mehrebenen-Hurdle-Lognormal-Modells mit zufälligem Intercept zeigen, dass Essensboxen im Vergleich zu traditionell gekochten Mahlzeiten insgesamt zu einer Verringerung der gesamten Essensabfälle führen (38 % weniger). Mahlzeitendosen verringern vor allem das Auftreten und die Menge der verschwendeten Pfannen- und Topfgerichte (d. h. Kochabfälle) sowie die Menge der Mahlzeitenzubereitungsabfälle, führen jedoch im Vergleich zu herkömmlichen Mahlzeiten zu einem höheren Aufkommen von Zubereitungs- und Tellerabfällen. Dies zeigt, wie sich die Unterschiede zwischen den einzelnen Mahlzeiten auf die Lebensmittelabfälle in den Haushalten auswirken, ein Aspekt, der bisher in der Forschung wenig Beachtung gefunden hat. Während sich die meisten früheren Untersuchungen auf die gesamte Lebensmittelverschwendung in Haushalten konzentrierten, zeigt unsere Studie, dass die Unterscheidung zwischen verschiedenen Arten von Lebensmittelabfällen in Haushalten wichtige neue Erkenntnisse liefern kann.
Dieser Artikel befasst sich mit dem bundesweiten Niveau der Treibhausgas (THG)-Emissionen und des Ressourcenverbrauchs in der deutschen Gemeinschaftsverpflegung im Segment "Business" und deren Einsparpotenziale durch verschiedene Szenarien der ungestützten und gestützten Rezeptüberarbeitung. Unter "ungestützt" verstehen wir in dieser Arbeit die intuitive Optimierung von Rezepten durch die Mitarbeiter von Betrieben der Gemeinschaftsverpflegung. Die "unterstützten" Ansätze mussten dagegen bestimmte Zielvorgaben erfüllen, zum Beispiel der Deutschen Gesellschaft für Ernährung; engl. Deutschen Gesellschaft für Ernährung oder das nachhaltige Niveau. Konkret Konkret wird getestet, wie sich (A) eine ungestützte Rezeptüberarbeitung, (B) eine Rezeptüberarbeitung auf Basis von Ernährungsempfehlungen und (C) eine Rezeptüberarbeitung mit wissenschaftlicher Begleitung die Umweltauswirkungen eines Gerichtes beeinflussen. Als methodischer Rahmen diente eine Online-Befragung von Unternehmen der Gemeinschaftsverpflegung sowie eine Szenarioanalyse auf Menüebene und auf nationaler Ebene durchgeführt. Die Ergebnisse basieren zum einen auf empirischen Daten und zum anderen auf Hochrechnungen. Die Ergebnisse zeigen, dass die die bundesweite Umsetzung der Rezepturüberarbeitung nach wissenschaftlichen Vorgaben - wie konkrete Zielvorgaben für die THG Emissionen pro Portion - bis zu 44% des Ressourcenverbrauchs in der deutschen Betriebsgastronomie einsparen kann (das entspricht 3,4 Millionen Tonnen Ressourcen pro Jahr) und bis zu 40 % der THG-Emissionen (0,6 Millionen Tonnen THG-Emissionen pro Jahr) einsparen.
The study aimed to investigate inactivation of naturally occurring microorganisms and quality of red pepper paste treated by high pressure processing (HPP). Central composite rotatable design was employed to determine the impacts of pressure (100–600 MPa) and holding time (30–600 s). HPP at 527 MPa for 517 s reduced aerobic mesophilic bacteria count by 4.5 log CFU/g. Yeasts and molds counts were reduced to 1 log CFU/g at 600 MPa for 315 s. Total phenols, carotenoids and antioxidants activity ranged from 0.28 to 0.33 g GAE/100 g, 96.0–98.4 mg βc/100 g and 8.70–8.95 μmol TE/g, respectively. Increase (2.5–6.7%) in these variables was observed with increasing pressure and holding time. Total color difference (ΔE∗) values (0.2–2.8) were within the ranges of ‘imperceptible’ to ‘noticeable’. Experimental results were fitted satisfactorily into quadratic model with higher R2 values (0.8619–0.9863). Optimization process suggested treatment of red pepper paste at 536 MPa for 125 s for maximum desirability (0.622). Validation experiments confirmed comparable percentage of relative errors. Overall, this technique could be considered as an efficient treatment for the inactivation of microorganisms that naturally occur in red pepper paste with minimal changes in its characteristics.
Der Schwerpunkt des vorliegenden Papiers liegt auf der Nachfrageseite. In realen Labors verwenden wir einen standardisierten empirischen Ansatz, um verschiedene Nudging-Maßnahmen aus dem Bereich der physischen Umwelt und des Entscheidungsprozesses der Verbraucher zu vergleichen. Wir vergleichen die Auswirkungen ein und derselben Maßnahme in verschiedenen Umgebungen und die Auswirkungen verschiedener, aufeinander folgender Nudging-Maßnahmen in derselben Umgebung. Die Daten wurden in acht Betriebs- und Schulkantinen in Deutschland in zwei Projektdurchläufen (2016/2017; 2019/2020) erhoben. Es wurde ein ähnliches Interventionskonzept angewandt. Die Vergleichbarkeit wurde durch eine harmonisierte Speisekarte gewährleistet. Die erste Iteration des Projekts ergab, dass nur ein Nudge (oberste Menüposition, +22,5 %) zu einem signifikanten Anstieg der Wahl nachhaltiger Lebensmittel führte, während die Ergebnisse der zweiten Iteration zeigten, dass alle Nudge-Interventionen (beste Thekenposition, +11,6 %; oberste Menüposition, +6,9 %; Etikett plus Informationen, +15,9 %) die Wahl der Verbraucher positiv beeinflussten. Mögliche Erklärungen wie die striktere Einhaltung des Versuchsplans in den Cafeterien, aber auch gesellschaftliche Entwicklungen wie das Aufkommen der Fridays for Future-Bewegung werden diskutiert. Da die Ergebnisse je nach Standort und Umfeld variieren, legen unsere Ergebnisse nahe, dass Nudges situativen Bedingungen angepasst werden müssen, um die höchste Wirksamkeit zu erzielen.
The present study investigates properties of heat-induced, self-standing gels of globular proteins. Native egg white protein (EWP) with 9,8 wt% protein and 0,395 wt% NaCl content was adjusted to pH = 7,0 and heated from 25 to 85 °C via Ohmic heating (OH) and conventional heating (COV) with respective come-up times (CUT, 240 and 1200 s) and holding times (HOLD, 30 and 900 s). Gels heated under OH showed lower denaturation levels and less water holding capacity. When HOLD was short, the firmness of OH gels exceeded COV gel firmness but deceeded at long HOLD. Similarly, at short HOLD OH samples presented higher hydrophobic interactions whereas at long HOLD COV gels showed more hydrophobic interactions. This correlated with changes of intermolecular beta-sheet structures which increased with HOLD at COV but decreased or remained unchanged during OH. Furthermore, as an SDS-PAGE revealed the main EWP, ovalbumin, did not fully denature when heated via OH, this lead to the assumption that the oscillatory electric field partially interferes the complete denaturation and development of intermolecular beta-sheet structures and hydrophobic interactions during thermal gelation of this protein. Scanning electron microscopy also showed deviances in network structures between OH and COV as COV gels exhibited a denser and OH gels a more open and porous network structure.
Currently, the modelling of drying processes of plant tissues pre-treated by pulsed electric field (PEF) is following experimentally identified curves or separate heat and mass transfer and diffusion models with different levels of accuracy. This research had two major objectives: mathematical modeling and control of drying process of different vegetables pretreated by PEF during convective drying. The mathematical modeling was based on Luikov's heat and mass transfer model along with properties of different vegetables. Computer modelling was done using the difference method for predicting moisture and the temperature potentials of untreated and PEF-treated vegetables. The formulation and the solution procedures were applied to simulate the simultaneous heat and mass transfer in selected vegetables subjected to the convective drying. Suggested model had a good correlation with experimental results. Moreover, cell disintegration index can be used as a controllable parameter in heat and mass transfer models to predict drying behavior of potato, onion, and carrot tissues. Obtained drying models can be used as a mathematical tool to predict drying behavior for various types of agricultural products pre-treated by pulsed electric field.
The impact of Pulsed Electric Fields (PEF) on the peeling ability of different fruits and vegetables in particular tomatoes, peaches, peppers, and oranges were investigated. Samples were exposed to a fixed electric field strength of 2.15 kV/cm. The specific energy ranged from 0.6 kJ/kg to 50.3 kJ/kg. The treated raw materials were analysed regarding to the peeling ability, skin size and weight and firmness. The best result for tomatoes at a specific energy of 1.2 kJ/kg induced a high score of peeling ability that led to less product loss and could therefore increase the yield by 33.84%–41.53% compared to untreated samples. Moreover, an increased skin size by a factor of 3.7 was observed. However, PEF had no significant impact on peeling ability of oranges, peppers, and peaches. Although oranges showed an improvement in peeling ability by up to 32%, this cannot be traced back to the PEF treatment. The different properties and structures of the raw materials were discussed and provided indications about the limitation of PEF.
Background
Spinach is a nitrogen (N) demanding crop with a weekly N uptake of up to 60 kg ha–1. Consequently, a high N supply is required, which can temporarily lead to high quantities of nitrate (NO3–) being at risk of leaching.
Aims
The objective of this study was to develop a N fertilization approach to reduce the risk of NO3– leaching in field-grown spinach production without adversely affecting crop yield and quality at an early and late harvest stage.
Methods
Ten fertilization trials were conducted to compare different base fertilization rates and splits of top dressings. For top dressings, granulated fertilizers or foliar sprays were used. In a further treatment, N supply was reduced by withholding the second top dressing of 50–70 kg ha−1.
Results
Nitrate concentration at risk of leaching was considerably reduced by decreasing the base fertilizer rate as well as by splitting the top dressing. However, at an early harvest stage, total aboveground dry mass was reduced by, on average, 6% by these measures across all seasons. In contrast, at a later harvest stage, spinach was less affected by the fertilizer schedule. Urea foliar sprays proved to be insufficient in promoting plant growth and caused leaf necrosis. A reduced N supply led to impaired plant growth and yellowish leaves in both spring and winter.
Conclusions
Base N fertilization of spinach is only required in spring, but not in other seasons. Despite slight yield reduction, the top dressing should be split to reduce the risk of NO3− leaching after an early harvest.
Intensive care units (ICU) are often overflooded with alarms from monitoring devices which constitutes a hazard to both staff and patients. To date, the suggested solutions to excessive monitoring alarms have remained on a research level. We aimed to identify patient characteristics that affect the ICU alarm rate with the goal of proposing a straightforward solution that can easily be implemented in ICUs. Alarm logs from eight adult ICUs of a tertiary care university-hospital in Berlin, Germany were retrospectively collected between September 2019 and March 2021. Adult patients admitted to the ICU with at least 24 h of continuous alarm logs were included in the study. The sum of alarms per patient per day was calculated. The median was 119. A total of 26,890 observations from 3205 patients were included. 23 variables were extracted from patients' electronic health records (EHR) and a multivariable logistic regression was performed to evaluate the association of patient characteristics and alarm rates. Invasive blood pressure monitoring (adjusted odds ratio (aOR) 4.68, 95%CI 4.15–5.29, p < 0.001), invasive mechanical ventilation (aOR 1.24, 95%CI 1.16–1.32, p < 0.001), heart failure (aOR 1.26, 95%CI 1.19–1.35, p < 0.001), chronic renal failure (aOR 1.18, 95%CI 1.10–1.27, p < 0.001), hypertension (aOR 1.19, 95%CI 1.13–1.26, p < 0.001), high RASS (aOR 1.22, 95%CI 1.18–1.25, p < 0.001) and scheduled surgical admission (aOR 1.22, 95%CI 1.13–1.32, p < 0.001) were significantly associated with a high alarm rate. Our study suggests that patient-specific alarm management should be integrated in the clinical routine of ICUs. To reduce the overall alarm load, particular attention regarding alarm management should be paid to patients with invasive blood pressure monitoring, invasive mechanical ventilation, heart failure, chronic renal failure, hypertension, high RASS or scheduled surgical admission since they are more likely to have a high contribution to noise pollution, alarm fatigue and hence compromised patient safety in ICUs.
Trotz wachsender Bedeutung von Talent Management (TM) in Unternehmen gelingt es nicht, der Talentknappheit zu begegnen. Die Corona-Pandemie verschärft die Situation. Denn der bislang nicht ausgeschöpfte Anteil qualifizierter Frauen auf dem Arbeitsmarkt wächst u. a., weil sich anteilig mehr Frauen als Männer zur Erfüllung von Sorgeaufgaben vom Arbeitsmarkt zurückziehen. Gleichzeitig werden Maßnahmen zur Vereinbarung von Berufs- und Privatleben bislang bei der Rekrutierung und Bindung von Talenten nicht oder unzureichend thematisiert. Auf der Basis der wissenschaftlichen Diskussion wird daher die Frage untersucht, inwiefern sich Vereinbarkeitsangebote von Talenten karriereunschädlich nutzen lassen.