Search Results - "Kopke, U"

Carbon nanotube-reinforced epoxy-composites: enhanced stiffness and fracture toughness at low nanotube content by Gojny, F.H., Wichmann, M.H.G., Köpke, U., Fiedler, B., Schulte, K.

“…Nanocomposites consisting of double-wall carbon nanotubes (DWCNTs) and an epoxy matrix were produced by a standard calandering technique. A very good…”
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Nanoscale reconstruction of surface crystallography from three-dimensional polarization distribution in ferroelectric barium–titanate ceramics by Eng, L. M., Güntherodt, H.-J., Schneider, G. A., Köpke, U., Muñoz Saldaña, J.

“…The three-dimensional orientation of polarization vectors at the surface of ferroelectric barium–titanate (BaTiO3) ceramics is evaluated using…”
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In situ endoscopy: New insights to root growth in biopores by Kautz, T., Köpke, U.

“…A flexible videoscope with an outer diameter of 3.8 mm and equipped with a movable tip was used for in situ observation of roots growing in larger-sized…”
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Hygienic quality of head lettuce: Effects of organic and mineral fertilizers by Wießner, S., Thiel, B., Krämer, J., Köpke, U.

“…The hygienic quality of head lettuce ( Lactuca sativa L.) was investigated after different fertilizer treatments (fresh farmyard manure, composted farmyard…”
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Night‐time tillage revisited: the delayed soil desiccation process in night‐time tilled plots may promote unexpected weed germination by Juroszek, P, Neuhoff, D, Köpke, U, Smith, Richard

“…Summary Night‐time tillage and sowing (photocontrol of weeds, soil cultivation in darkness) can reduce the germination and subsequent density of…”
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Weed suppression ability of three winter wheat varieties at different row spacing under organic farming conditions by DREWS, S, NEUHOFF, D, KÖPKE, U

“…For three seasons, six field trials were conducted in winter wheat (Triticum aestivum) at different sites in North Rhine-Westphalia, Germany. The aim was to…”
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Nodulation of lucerne (Medicago sativa L.) roots: depth distribution and temporal variation by Li, F., Kautz, T., Pude, R., Köpke, U.

“…This study was undertaken in order to test whether the development of nodule density over the vegetation period is different in lucerne stands grown for 1, 2…”
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Effects of weed management practices on enteric pathogen transfer into lettuce ( Lactuca sativa var. capitata) by Fischer-Arndt, Meike, Neuhoff, D., Tamm, L., Köpke, U.

“…We evaluated the effect of using farmyard manure (FYM) in combination with four weed control techniques on the hygienic quality of lettuce. Treatments with six…”
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Farm-gate nutrient balance assessment of organic dairy farms at different intensity levels in Germany by Haas, G., Deittert, C., Köpke, U.

“…Organic farms are characterized as low external input agro-ecosystems. Currently, some organic dairy farmers feed higher amounts of concentrates and succulent…”
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Comparing intensive, extensified and organic grassland farming in southern Germany by process life cycle assessment by Haas, Guido, Wetterich, Frank, Köpke, Ulrich

“…To reduce the environmental burden of agriculture, suitable methods to comprehend and assess the impact on natural resources are needed. One of the methods…”
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Effects of traditional and biodynamic farmyard manure amendment on yields, soil chemical, biochemical and biological properties in a long-term field experiment by Zaller, J.G, Kopke, U

“…We studied the effects of applications of traditionally composted farmyard manure (FYM) and two types of biodynamically composted FYM over 9 years on soil…”
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Nutrient cycling in organic farms: stall balance of a suckler cow herd and beef bulls by Haas, G, Caspari, B, Köpke, U

“…In organic agriculture, the internal farm nutrient cycle must bequantified to ensure high system productivity accompanied by environmentallysound production…”
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Organic foods: do they have a role? by Köpke, U

“…Nutritional quality is defined as the value of the product for the consumer's physical health, growth, development, reproduction and psychological or emotional…”
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Bio-resource evaluation within agri-environmental assessment tools in different European countries by Braband, Dorothee, Geier, Uwe, Köpke, Ulrich

“…In order to achieve environmentally sound agriculture as well as a remuneration of ecological achievements on the farm level, practicable instruments for…”
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Effects of perfluorocarbons and perfluorocarbons/surfactant emulsions on growth and viability of group B streptococci and Escherichia coli by Rüdiger, Mario, Köpke, Urte, Prösch, Susanna, Rauprich, Petra, Wauer, Roland R, Herting, Egbert

“…OBJECTIVEPartial liquid ventilation with perfluorocarbons (PFC) might be used as a new ventilatory strategy to treat respiratory insufficiency in congenital…”
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Cotton-basil intercropping: effects on pests, yields and economical parameters in an organic field in Fayoum, Egypt by Schader, C, Zaller, J.G, Kopke, U

“…In many countries, cotton is traditionally intercropped with other plants in order to increase yields and to control pests. The effects of intercropping cotton…”
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In-line monitoring of carbon nanoparticle epoxy dispersion processes: Insights into the process via next generation three roll mills and impedance spectroscopy by Meeuw, H., Wisniewski, V. K., Köpke, U., Nia, A. S., Vázquez, A. R., Lohe, M. R., Feng, X., Fiedler, B.

“…The new generation of three roll mills is able to monitor occurring process loads while dispersion. This paper focuses on the interpretation of the gathered…”
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In-line monitoring of carbon nanoparticle epoxy dispersion processes by Meeuw, H, Wisniewski, V K, Köpke, U, Nia, A S, Vázquez, A R, Lohe, M R, Feng, X, Fiedler, B

“…The new generation of three roll mills is able to monitor occurring process loads while dispersion. This paper focuses on the interpretation of the gathered…”
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Alley cropping and mulching with Erythrina poeppigiana (Walp.) O. F. Cook and Gliricidia sepium (Jacq.) Walp.: effects on maize/weed competition by RIPPIN, M, HAGGAR, J. P, KASS, D, KÖPKE, U

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Alley cropping and mulching with Erythrina poeppigiana (Walp.) O.F. Cook and Gliricidia sepium (Jacq.) Walp.: effects on maize/weed competition by Rippin, M. (Bonn Univ. (Germany). Inst. of Organic Agriculture), Haggar, J.P, Kass, D, Koepke, U

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