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Year of publication
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- Article (1396) (remove)
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- Nachhaltigkeit (8)
- Logistik (6)
- Danube (4)
- Evaluation (4)
- Neurodynamik (4)
- Physiotherapie (4)
- logistics (4)
- selenium (4)
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Institute
Die Analyse der kommunalen Planungspraxis zur Auswahl und
Bewertung von Siedlungsflächen in der Flächennutzungsplanung zeigt auf, welchen Einfluss Forschungsergebnisse auf die
aktuelle Planungspraxis haben. Aufbauend auf einer Analyse
des Forschungsstandes und der rechtlichen Rahmenbedingungen wird die Bewertung von Siedlungsflächen in 29 verschiedenen Flächennutzungsplänen untersucht. Als Ergebnis
wurde ermittelt, dass in der Planungspraxis die Anzahl der Bewertungskriterien und die Komplexität der Bewertung in den
letzten Jahren stark zugenommen hat. Außerdem kann gezeigt werden, dass und wie stark sich die Planungsmethodik
und die verwendeten Kriterien zur Auswahl und Bewertung
von Siedlungsflächen zwischen den einzelnen Gemeinden
unterscheiden. Trotz umfangreicher anwendungsorientierter
Forschung seit den 1990er Jahren zur Bewertung und Auswahl
von Siedlungsflächen lassen sich jedoch nur indirekte Einflüsse der Forschungsergebnisse auf die Planungspraxis identifizieren. Teilweise wurde allerdings festgestellt, dass auch von den Gemeinden selbst neue Kriterien und Vorgehensweisen
entwickelt werden.
Das Thema Gender wird im Marketing kontrovers diskutiert. Als Orientierungspunkt für einen angemessenen Umgang wird häufig das Nachhaltigkeitsziel Nr. 5 Geschlechtergleichstellung der Vereinten Nationen genannt. Dieser Artikel geht mit Hilfe einer Literaturanalyse der Frage nach, inwieweit Forschungsergebnisse aus der führenden Marketingliteratur geeignet sind, Gleichstellung im Sinne des Ziels Nr. 5 voranzutreiben. Dabei wird zunächst das Ziel Nr. 5 erläutert und dann betrachtet, welchen Beitrag es für das Marketing Management zur Zielerreichung ermöglicht. Die Erkenntnisse aus der Forschung bieten eine Basis, wie in der Marketing-Praxis gendersensibel agiert werden kann.
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.
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.
Petersen, Finn ; Demann, Johannes ; Restemeyer, Dina ; Olfs, Hans-Werner ; Westendarp, Heiner ; Appenroth, Klaus-Jürgen ; Ulbrich, Andreas
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.