نتایج جستجو برای: ammonia synthesis

تعداد نتایج: 434427  

Journal: :journal of nanostructures 2012
y. vahidshad r. ghasemzadeh a. irajizad a. masoud

cuals2  chalcopyrite  nanocrystalline  are  synthesized  with  facile method.  the  heat  arrested  solvothermal  method  for  synthesize nanocrystalline  were  investigated.  the  time  duration  of  synthesis, temperature of solution and metal salts to solvent molar ratio can be parameters  that we are  studied. the nanoparticles were  synthesized with cucl, alcl3 and  thiourea (sc(nh2)2) as ...

Journal: :Annals of hepatology 2011
Claudia Isabel Blanco Vela Jorge Luis Poo Ramírez

Hyperammonemia and associated cerebral edema cause neurological abnormalities in liver disease patients. Although only 15% of ammonia production originates in the colon, management strategies for hepatic encephalopathy (HE) have focused on reducing ammonia generation from the bowel rather than on manipulating systemic mechanisms involved in ammonia metabolism. Administration of L-ornithine L-as...

Journal: :Journal of bacteriology 1998
Y Qian F R Tabita

In a ribulose 1,5-bisphosphate carboxylase/oxygenase (RubisCO)-deficient mutant of Rhodobacter sphaeroides, strain 16PHC, nitrogenase activity was derepressed in the presence of ammonia under photoheterotrophic growth conditions. Previous studies also showed that reintroduction of a functional RubisCO and Calvin-Benson-Bassham (CBB) pathway suppressed the deregulation of nitrogenase synthesis i...

Journal: :Quarterly journal of experimental physiology 1988
T Motyl A Orzechowski S Pierzynowski

The influence of ammonia and inhibition of the urea cycle by norvaline on orotic acid synthesis in five Polish Merino ewes was investigated. The sheep were exposed to 60 min of successive infusions of 0.9% NaCl, NH4Cl (20 mumol kg-1 min-1), and NH4Cl with DL-norvaline (10 mumol kg-1 min-1) solutions administered to the mesenteric vein. The average rate of orotic acid output, urea output and amm...

Journal: :Journal of fish diseases 2012
Y Y Sung R J Roberts P Bossier

Exposure to TEX-OE®, a patented extract of the prickly pear cactus (Opuntia ficus indica) containing chaperone-stimulating factor, was shown to protect common carp, Cyprinus carpio L., fingerlings against acute ammonia stress. Survival was enhanced twofold from 50% to 95% after exposure to 5.92 mg L(-1) NH(3) , a level determined in the ammonia challenge bioassay as the 1-h LD50 concentration f...

Journal: :JOP : Journal of the pancreas 2010
Udayakumar Navaneethan Preethi G K Venkatesh

CONTEXT Idiopathic hyperammonemia is characterized by elevated serum ammonia associated with neurological deterioration of no other obvious etiology associated with relatively normal liver function tests and normal amino-acid levels. CASE REPORT We report a case of a 32-year-old woman who presented with acute mental status changes with a pelvic abscess approximately a year following her total...

2013
Yoshifumi Kawai Shuhei Noda Chiaki Ogino Yasunobu Takeshima Naoko Okai Tsutomu Tanaka Akihiko Kondo

BACKGROUND p-Hydroxycinnamic acid (pHCA) is an aromatic compound that serves as a starting material for the production of many commercially valuable chemicals, such as fragrances and pharmaceuticals, and is also used in the synthesis of thermostable polymers. However, chemical synthesis of pHCA is both costly and harmful to the environment. Although pHCA production using microbes has been widel...

2015
George Zacharakis-Jutz George Elias Zacharakis-Jutz Daniel Attinger Thomas Brumm

In this study performance characteristics of ammonia engines using direct injection strategies are investigated. Ammonia is a carbon-free fuel, and thus its combustion does not produce carbon dioxide, a critical greenhouse gas. Ammonia can be produced by using renewable energy sources (e.g., wind and solar) and used as an energy carrier. Recent research also has shown that the efficiency of sol...

Journal: :Pediatrics 2000
J G Huijmans M Duran J B de Klerk M J Rovers H R Scholte

OBJECTIVE The combination of persistent hyperammonemia and hypoketotic hypoglycemia in infancy presents a diagnostic challenge. Investigation of the possible causes and regulators of the ammonia and glucose disposal may result in a true diagnosis and predict an optimum treatment. PATIENT Since the neonatal period, a white girl had been treated for hyperammonemia and postprandial hypoglycemia ...

Journal: :The Journal of clinical investigation 1976
R T Bogusky L M Lowenstein J M Lowenstein

Particle-free extracts prepared from kidney cortex of rat catalyze the formation of ammonia via the purine nucleotide cycle. The cycle generates ammonia and fumarate from aspartate, using catalytic amounts of inosine monophosphate, adenylosuccinate, and adenosine monophosphate. The specific activities of the enzymes of the cycle are 1.27+/-0.27 nmol/mg protein per min (SE) for adenoylosuccinate...

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