نتایج جستجو برای: methyl nitrite

تعداد نتایج: 121146  

2015
E. JACOX

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Ashraf S. Shahvelayati Fatemeh Sameni Khadijeh Yadollahzadeh

The selective nitrosation of β-dicarbonyl compounds with sodium nitrite was carried out under1-methyl-3-carboxymethylimidazolium chloride, prepared from N-methylimidazole andchloroacetic acid, as an acidic ionic liquid. The reaction was found to proceed under relativelymild conditions with excellent conversion and selectivity. The ionic liquid was recycled andreused.

Journal: :The Biochemical journal 1996
S Sengupta M S Shaila G R Rao

Nitrate assimilation in many plants, algae, yeasts and bacteria is mediated by two enzymes, nitrate reductase (EC 1.6.6.2) and nitrite reductase (EC 1.7.7.1). They catalyse the stepwise reduction of nitrate to nitrite and nitrite to ammonia respectively. The nitrite reductase from an industrially important yeast, Candida utilis, has been purified to homogeneity. Purified nitrite reductase is a ...

2013
Wei-Guang Liu Shiqing Wang Siddharth Dasgupta Stefan T. Thynell William A. Goddard Sergey Zybin Richard A. Yetter

The gas-phase chemistry of the hypergolic system CH3NHNH2 – monomethylhydrazine (MMH), with oxidizers NO2/N2O4 at room temperature and 1 atm N2 was investigated experimentally using a gold-coated chamber reactor, coupled with a Fourier transform infrared (FTIR) spectrometer. The IR-active species identified in the early reactions include HONO, monomethylhydrazinium nitrite (MMH HONO), methyl di...

2002
Tokihiro Hirohito IKEDA Miho YUKAWA

In the case of the nitrosation of the methyl or ethyl group of carbonyl compounds, such as acetone and 2-butanone, the E-form of the hydroxyimino compound was predominantly obtained. On the other hand, a E-form/Z-form (E/Z) ratio of 2.3 was observed for the nitrosation of 3-methyl-1phenylbutan-1-one (PhCOCH2CH(CH3)2) (5) with tert-butyl nitrite in THF. Thus the E/Z ratio decreased with increasi...

Journal: :Hypertension 2008
Markus P Schneider Yuqiang Ge David M Pollock Jennifer S Pollock Donald E Kohan

Mice with a collecting duct-specific deletion of endothelin-1 are hypertensive and have impaired Na excretion. Because endothelin-1 activates NO synthase (NOS) in the collecting duct, we hypothesized that impaired renal NO production in knockout mice exacerbates the hypertensive state. Control and knockout mice were treated chronically with N(G)-nitro-l-arginine methyl ester, and blood pressure...

Journal: :American journal of physiology. Heart and circulatory physiology 2005
Koichiro Tsuchiya Yasuhisa Kanematsu Masanori Yoshizumi Hideki Ohnishi Kazuyoshi Kirima Yuki Izawa Michiyo Shikishima Tatsuhiro Ishida Shuji Kondo Shoji Kagami Yoshiharu Takiguchi Toshiaki Tamaki

In this study, we investigated whether orally administered nitrite is changed to NO and whether nitrite attenuates hypertension in a dose-dependent manner. We utilized a stable isotope of [15N]nitrite (15NO2-) as a source of nitrite to distinguish between endogenous nitrite and that exogenously administered and measured hemoglobin (Hb)-NO as an index of circulating NO in whole blood using elect...

2017
Amani Cherif-Sayadi Kaouther Hadj Ayed-Tka Mohamed Amine Zaouali Mohamed Bejaoui Najet Hadj-Abdallah Ahlem Bouhlel Hassen Ben Abdennebi

INTRODUCTION Nitrite has been found to protect liver graft from cold preservation injury. However, the cell signaling pathway involved in this protection remains unclear. Here, we attempt to clarify if the NOS pathway by using the NOS inhibitor, L-NAME (L-NG-Nitroarginine methyl ester). ANIMALS AND METHODS Rat livers were conserved for 24 h at 4°C in (IGL-1) solution enriched or not with nitr...

Journal: :American journal of physiology. Heart and circulatory physiology 2009
Zeling Cao Jeffrey B Bell Joy G Mohanty Enika Nagababu Joseph M Rifkind

A role for nitric oxide (NO) produced during the reduction of nitrite by deoxygenated red blood cells (RBCs) in regulating vascular dilation has been proposed. It has not, however, been satisfactorily explained how this NO is released from the RBC without first reacting with the large pools of oxyhemoglobin and deoxyhemoglobin in the cell. In this study, we have delineated a mechanism for nitri...

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