Topic
Low protein
About: Low protein is a research topic. Over the lifetime, 8139 publications have been published within this topic receiving 213225 citations.
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TL;DR: The PEGDA-grafted PDMS exhibited useful characteristics for microfluidic devices (e.g. hydrophilicity, low protein adsorption, and low cell attachment), and the technique presented in this study will be useful for surface modification of various research tools and devices.
91 citations
TL;DR: Fosfomycin maintains activity against most Enterobacteriaceae including Escherichia coli, but plasmid-mediated resistance due to inactivation have appeared in recent years, which has the potential to compromise its use in the future.
91 citations
TL;DR: This contribution examines the challenges to predicting the profile of nutrients available for absorption in dairy cattle and provides guidelines for further improved prediction with regard to animal production responses and environmental pollution.
Abstract: Current feed evaluation systems for dairy cattle aim to match nutrient requirements with nutrient intake at pre-defined production levels. These systems were not developed to address, and are not suitable to predict, the responses to dietary changes in terms of production level and product composition, excretion of nutrients to the environment, and nutrition related disorders. The change from a requirement to a response system to meet the needs of various stakeholders requires prediction of the profile of absorbed nutrients and its subsequent utilisation for various purposes. This contribution examines the challenges to predicting the profile of nutrients available for absorption in dairy cattle and provides guidelines for further improved prediction with regard to animal production responses and environmental pollution. The profile of nutrients available for absorption comprises volatile fatty acids, long-chain fatty acids, amino acids and glucose. Thus the importance of processes in the reticulo-rumen is obvious. Much research into rumen fermentation is aimed at determination of substrate degradation rates. Quantitative knowledge on rates of passage of nutrients out of the rumen is rather limited compared with that on degradation rates, and thus should be an important theme in future research. Current systems largely ignore microbial metabolic variation, and extant mechanistic models of rumen fermentation give only limited attention to explicit representation of microbial metabolic activity. Recent molecular techniques indicate that knowledge on the presence and activity of various microbial species is far from complete. Such techniques may give a wealth of information, but to include such findings in systems predicting the nutrient profile requires close collaboration between molecular scientists and mathematical modellers on interpreting and evaluating quantitative data. Protozoal metabolism is of particular interest here given the paucity of quantitative data. Empirical models lack the biological basis necessary to evaluate mitigation strategies to reduce excretion of waste, including nitrogen, phosphorus and methane. Such models may have little predictive value when comparing various feeding strategies. Examples include the Intergovernmental Panel on Climate Change (IPCC) Tier II models to quantify methane emissions and current protein evaluation systems to evaluate low protein diets to reduce nitrogen losses to the environment. Nutrient based mechanistic models can address such issues. Since environmental issues generally attract more funding from governmental offices, further development of nutrient based models may well take place within an environmental framework.
91 citations
01 Jun 1972
TL;DR: In this paper, the association behavior of αs1- and β-casein was investigated by light scattering at normal and elevated pressures, and it was inferred that hydrophobic bonding is the main driving force in the association of the caseins.
Abstract: The associations of αs1- and β-casein were investigated by light scattering at normal and elevated pressures. Special care was taken to measure the concentration dependence of the apparent molecular weight at very low protein concentrations. The association behavior of both proteins appeared to be quite different. αs1-Casein undergoes a series of consecutive association steps, whereas β-casein forms polymers of a very high degree of polymerization. Two methods have been proposed for the separation of the contributions of association and nonideality to the apparent molecular weight and values of the association constants and second virial| coefficients are presented for both proteins. From thermodynamic considerations it was inferred that hydrophobic bonding is the main driving force in the association of the caseins. This is in agreement with the results of light-scattering measurements at elevated pressures which show the polymers to be dissociated with increasing pressure up to 1500 kg/cm2.
91 citations
TL;DR: Exercise training, decreased adiposity, and long-term consumption of a low-protein, low-calorie diet are associated with low plasma growth factors and hormones that are linked to an increased risk of cancer.
91 citations