نتایج جستجو برای: trophic evaluation
تعداد نتایج: 839178 فیلتر نتایج به سال:
Free-living nematodes are well-recognized as an abundant and ubiquitous component of benthic communities in inland waters. Compelling evidence from soil and marine ecosystems has highlighted the importance of nematodes as trophic intermediaries between microbial production and higher trophic levels. However, the paucity of empirical evidence of their role in freshwater ecosystems has hampered t...
Mesenchymal stem cell (MSC) therapy is a promising approach to promote tissue regeneration by either differentiating the MSCs into the desired cell type or by using their trophic functions to promote endogenous tissue repair. These strategies of regenerative medicine are limited by the availability of MSCs at the point of clinical care. Our laboratory has recently identified multipotent mesench...
OBJECTIVE To evaluate the effect of initial low energy permissive underfeeding ("trophic feeding") versus full energy enteral feeding ("full feeding") on physical function and secondary outcomes in patients with acute lung injury. DESIGN Prospective longitudinal follow-up evaluation of the NHLBI ARDS Clinical Trials Network's EDEN trial SETTING 41hospitals in the United States. PARTICIPAN...
Lake Uluabat, which is located in Marmara region, is one of the most productive lakes in Turkey. Due to concerns about potential pollution resulting from watershed sources and adjacent agricultural lands, a study of the trophic state of lake Uluabat was conducted during the period February 2003 to January 2004. Total nitrogen (TN), total phosphorus (TP), Secchi disc depth (SD) and chlorophyll a...
Trophic ulceration is a most serious hazard to the man with anaesthetic feet who leads an active life. The only way to heal an ulcer is to rest it. If the patient walks on the ulcer it deepens and osteomyelitis ensues ; the scarring and distortion make further ulceration inevitable until walking finally becomes impossible. The entire history of a plantar trophic ulcer is dominated by mechanical...
Mean trophic level (MTL) of landings and primary production required (PPR) by fisheries are increasingly used in the assessment of sustainability in fisheries. However, in their present form, MTL and PPR are prone to misinterpretation. We show that it is important to account for actual catch data, define an appropriate historical and spatial domain, and carefully consider the effects of fisheri...
The existing models for assessing the trophicity indicators of water bodies are intended specific bodies, and adaptation is required their use with regard to others. Another problem lack approaches in remote monitoring development an integral indicator bodies. purpose this study develop calculating biotic abiotic state a reservoir, as well its trophicity. To achieve goal, tasks were set compare...
The distribution of biomass among trophic levels provides a theoretical basis for understanding energy flow and the hierarchical structure of animal communities. In the absence of energy subsidies [1], bottom-heavy trophic pyramids are expected to predominate, based on energy transfer efficiency [2] and empirical evidence from multiple ecosystems [3]. However, the predicted pyramid of biomass d...
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