نتایج جستجو برای: 1 carbon fixation rate rgco2 l
تعداد نتایج: 4040194 فیلتر نتایج به سال:
Background : Nitrogen-containing ions such as nitrate and nitrite occur widely in a variety of water sources. This pollutant causes health problems such as the blue-baby syndrome, and possible formation of carcinogenic compounds in the digestive tract. Thus, removing them from water sources seems necessary. Biological denitrification is a method used in the treatment of nitrate contaminated wat...
Introduction: Hexavalent chromium (VI) is a very strong oxidizing agent that, despite its many uses in various industries, duration of the exposure can lead to lung cancer, deep wounds (in the hands, arm, tongue and palate), nasal septum perforation, burning and inflammation in the nose, lung and upper respiratory tract, asthma, contact dermatitis, damage to the kidneys and liver, and skin alle...
biological soil crusts (bscs) result from an intimate association between soil particles and cyanobacteria, algae, fungi, lichens and mosses in different proportions which live on the surface, or immediately in the uppermost millimeters of soil. therefore bscs cover the ground surface as a coherent layer, and influence primary processes such as carbon and nitrogen fixation and hydrologic status...
Background and Aim: Availability and low cost of date stones make them useful as raw material in the preparation of activated carbon. Cyanide, because of its toxicity for humans and aquatic organisms, is one of the most important health problems. The aim of the present study was to evaluate cyanide removal from aqueous solutions and determine influencing parameters in its adsorption into activa...
Examining the economic value of carbon sequestration in forests is essential, given the risk of global climate change, which has posed a profound challenge to societies internationally. The present study investigates the amount of carbon sequestration and its economic value in the oak forests (Quercus brantii L.) of Pahnus forest habitat with an area of 990 ha, located in Chaharmahal va Bakhtia...
background and objective: sorbitol is a non-toxic and slightly hygroscopic compound with different applications. zymomonas mobiles produces sorbitol from sucrose or mixtures of glucose and fructose (formation is coupled with the dehydrogenation of glucose to glucono-δ- lactone). recombinant zymomonas mobilis may produce sorbitol and gluconic acid from glucose and fructose using different divale...
Carbox dioxide fixation studies were conducted with rapidly growing JA-1 sarcoma cells in vitro. Isotope was isolated in asparagine, aspartic acid, glutamic acid, and glutamine. Chemical degradation of these compounds suggested three sites of fixation. They were carbon dioxide condensation with (a) pyruvic acid, (6) propionyl CoA, and (c) a three-carbon fragment such as the isopropyl carbons of...
A pilot field experiment to assess the relationship between traditional biogeochemical rate measurements and transcriptional activity of microbial populations was carried out at the LEO 15 site off Tuckerton, N.J. Here, we report the relationship between photosynthetic capacity of autotrophic plankton and transcriptional activity of the large subunit gene (rbcL) for ribulose-1,5-bisphosphate ca...
the Marine Environment # 2008 16/B978-0-12-372522-6.00035-9 All rig Else hts 1537 1 .1. N itrogen in the preoxygenated world/oceans 1537 1 .2. O xygenation of the early atmosphere: The influence of shelf area and nitrogen fixation rates 1538 2. N itrogen-Fixation, Nitrogenase, and Oxygen. Evolutionary Constraints, Adaptations of Cellular Pathways and Organisms, Feedbacks to Global Nitrogen, Car...
Extremely small quantities of carbon monoxide in air inhibit nitrogen fixation by red clover plants inoculated with Rhizobium trifolii (Lind and Wilson, 1941). In preliminary trials with Azotobacter vinelandii Wyss (1941) found a similar inhibition at carbon monoxide concentrations about 10 times those required for the symbiotic system. We have made a detailed study of the inhibition of this az...
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