نتایج جستجو برای: light and nutrients
تعداد نتایج: 16890661 فیلتر نتایج به سال:
this experiment was conducted to evaluate the effects of different commercial multi enzymes and nutrients levels of diets on performance and carcass traits of broilers. in this experiment 288 day old ross – 308 broilers (male and female) were used as (2*4) factors include: two levels of nutrients in diets (ross- 308 nutrients recommendation and 5% less than ross- 308 nutrients recommendation) a...
Breast cancer incidence is rising worldwide with an increase in aggressive neoplasias in young women. Possible factors involved include lifestyle changes, notably diet that is known to make an impact on gene transcription. However, among dietary factors, there is sufficient support for only greater body weight and alcohol consumption whereas numerous studies revealing an impact of specific diet...
Coupled production between algae and bacteria in stream epilithon was assessed along a nutrient-enrichment gradient in 8 Texas streams with open canopies. Photosynthesis (PS) and bacterial biomass production (BBP) were measured simultaneously using a dual-label radioassay (C-HCO3 – uptake and H-L-leucine incorporation into protein) on multiple samples within a stream reach. PS and BBP were meas...
conclusions the results of the current study suggest that increasing the quality of the diet calculated according to hei can reduce the risk of coming down with cataract. patients and methods this case-control study was conducted on 97 patients with cataract and 198 healthy people (as a control group) in iran. individuals were selected by the convenience sampling method and the food frequency q...
There is increasing awareness that many terrestrial and aquatic organisms are not strictly heterotrophic or autotrophic but rather mixotrophic. Mixotrophy is an intermediate nutritional strategy, merging autotrophy and heterotrophy to acquire organic carbon and/or other elements, mainly N, P or Fe. We show that both terrestrial and aquatic mixotrophs fall into three categories, namely necrotrop...
Evanescent Photosynthesis: A new approach to sustainable biofuel production Matthew D. Ooms Master of Applied Science Graduate Department of Mechanical and Industrial Engineering University of Toronto 2012 Immobilization of photosynthetic cultures has been investigated as a means of generating biofuel and other high value compounds through direct conversion of CO2 and water using energy from th...
1Center for Study and Research on Obesity, Department of Medical Biotechnology and Translational Medicine, University of Milan, Via Vanvitelli 32, 20129 Milan, Italy 2Department of Human Nutrition, Foods and Exercise, College of Agriculture & Life Sciences, Virginia Tech University, Blacksburg, VA 24061, USA 3Department of Molecular Medicine and Laboratory for Motor Activities in Rare Diseases ...
In this paper, the characterization of light/dark cycle in a photosynthetic microbial fuel cell used to recover energy of wastewater was carried out. To this end, a wide range of parameters were measured throughout both periods light/darkness. During the light phase, the electricity production was higher because algae carried out photosynthesis and produced oxygen, which acted as electron accep...
Agroforestry has been widely practiced in the Loess Plateau region of China because of its prominent effects in reducing soil and water losses, improving land-use efficiency and increasing economic returns. However, the agroforestry practices may lead to competition between crops and trees for underground soil moisture and nutrients, and the trees on the canopy layer may also lead to shortage o...
Ba sed on biophysical ice-core data collected in the landfast ice off Barrow, Alaska, USA, in 2002 and 2003, a one-dimensional ice–ocean ecosystem model was developed to determine the factors controlling the bottom-ice algal community. The data and model results revealed a three-stage ice-algal bloom: (1) onset and early slow growth stage before mid-March, when growth is limited by light; (2) f...
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