نتایج جستجو برای: fixed carbon

تعداد نتایج: 475910  

Journal: :Tree physiology 2007
Chelcy R Ford Nina Wurzburger Ronald L Hendrick Robert O Teskey

Plants can acquire carbon from sources other than atmospheric carbon dioxide (CO(2)), including soil-dissolved inorganic carbon (DIC). Although the net flux of CO(2) is out of the root, soil DIC can be taken up by the root, transported within the plant, and fixed either photosynthetically or anaplerotically by plant tissues. We tested the ability of Pinus taeda L. seedlings exposed to (13)C-lab...

2002
S. Reich C. Thomsen P. Ordejón

We investigate the tight-binding approximation for the dispersion of the p and p* electronic bands in graphene and carbon nanotubes. The nearest-neighbor tight-binding approximation with a fixed g0 applies only to a very limited range of wave vectors. We derive an analytic expression for the tight-binding dispersion including up to third-nearest neighbors. Interaction with more distant neighbor...

2006
LINDA SIMPSON

It has been pointed out in previous studies with carbonyl-labeled urethan that on injection this compound begins to break down almost imme diately, with about 90 per cent of the carbonyl carbon appearing in the expired carbon dioxide within the first 24 hours. Of the remainder of the carbonyl carbon, 5—10per cent was found in the urine and about 1 per cent was retained in a fixed form widely ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه قم 1389

چکیده : آرای صادره از دادگاه ها علاوه بر شیوه های عادی از طریق فوق العاده نیز قابل اعتراض و رسیدگی مجدد هستند. در مواقعی که رای دادگاه مخل به حقوق ثالث باشد وی می تواند به ان اعتراض کند. قلمرو شمول اعتراض ثالث به تصمیمات قضایی که از آن به رای تعبیر شده محدود می گردد. ولی در مورد قرارها که به اعدادی و نهایی تفکیک می شوند، چون هیچ رویه ثابت و مشخصی در این زمینه در دادگاهها وجود نداشته و همچنین ا...

ژورنال: سلامت و محیط زیست 2016

Background and Objectives: In order to optimize wastewater nitrogen removal and to reduce the problems of entering nutrients in final receptors, for example, a lake, partial nitrification, as a novel nitrogen removal method, was studied. Materials and Methods: The efficiency of simultaneous nitrification and denitrification (SND) in partial nitrification through nitrification/denitrification...

Journal: :iranian journal of nuclear medicine 2000
tayebeh hadizad gholamali shabani reza najafi

in recent years, several radiopharmaceuticals have been developed for imaging regional cerebral blood flow (rcbf) such as 75se labelled pipse and mose, ²º¹ti labelled ddc and 99mtc labelled hmpao. hmpao with two asymmetric carbon atoms (at the 3 and 9 positions), produces d,1 and meso isomers, only one of which is retained in the brain. rapid intracellular conversion of 99mtc-d,1-hmpao to hydro...

Background and Objective: Currently, photocatalysts have become a major focus of research in physics, chemistry, and surface engineering. It is hoped that this science help to solve various environmental problems.  This study investigated the effect of ultraviolet lamp type on the removal efficiency of xylene utilizing the fixation of TiO2 nanoparticles on the activated carbon absorber and pass...

Trade liberalization has impacts on the quality of the environment, i.e. on the emission of pollutant gases according to its size, composition and technology. On the other hand, trade liberalization is followed by international capital mobility intensification. Meanwhile according to the Pollution Haven hypothesis, transfer of pollutant industries starts from countries with tough environmental ...

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