نتایج جستجو برای: reactive nitrogen intermediate

تعداد نتایج: 396411  

2015
G. Yan

We measured total dissolved reactive nitrogen in precipitation samples collected at Uljin, a Korean coastal site upwind of the southern East Sea/Sea of Japan (EJS), selected as a representative study site of atmospheric deposition over the northwestern Pacific margin. NO−3 was found to be the most abundant nitrogen species, followed by NH+4 and dissolved organic nitrogen (DON). Air-mass back-tr...

2009
Tetsuo Nagano

Reactive oxygen species (ROS) play key roles in many pathogenic processes, including carcinogenesis, inflammation, ischemia-reperfusion injury and signal transduction. Also, reactive nitrogen species (RNS) cause various biological events such as neurodegenerative disorders. Sensitive and specific detection methods for ROS and RNS in biological samples should be useful for elucidation of biologi...

2015
Lucas A. Defelipe Esteban Lanzarotti Diego F. Gauto Marcelo A. Marti Adrian Gustavo Turjanski

Cysteine residues have a rich chemistry and play a critical role in the catalytic activity of a plethora of enzymes. However, cysteines are susceptible to oxidation by Reactive Oxygen and Nitrogen Species, leading to a loss of their catalytic function. Therefore, cysteine oxidation is emerging as a relevant physiological regulatory mechanism. Formation of a cyclic sulfenyl amide residue at the ...

Journal: :The Journal of biological chemistry 2001
A Montalvetti B N Bailey M B Martin G W Severin E Oldfield R Docampo

We report the cloning and sequencing of a gene encoding the farnesyl pyrophosphate synthase of Trypanosoma cruzi. The protein (T. cruzi farnesyl pyrophosphate synthase, TcFPPS) is an attractive target for drug development, since the growth of T. cruzi is inhibited by carbocation transition state/reactive intermediate analogs of its substrates, the nitrogen-containing bisphosphonates currently i...

Journal: :American journal of physiology. Regulatory, integrative and comparative physiology 2007
Michael T Bailey Harald Engler Nicole D Powell David A Padgett John F Sheridan

Phagocytes of the innate immune system, such as monocytes/macrophages, represent a first line of defense against invading microorganisms. Psychological stress is often thought to suppress the functioning of these cells, in part due to the immunosuppressive activity of stress-induced glucocorticoid hormones. However, exposure to the stressor social disruption (SDR) has been shown to increase cyt...

Journal: :journal of sciences islamic republic of iran 0

protonation of the highly reactive 1:l intermediate produced in the reaction between triphenylphosphine and dimethyl acetylenedicarboxylate by 2- hydroxyacetophenone leads to vinyltriphenylphosphonium salt, which undergoes aromatic electrophilic substitution reaction with the conjugate base to produce compounds 4,5, and 6 in 1 : 1.2:0.5 ratios

Journal: :Faraday discussions 2013
Agustín J Colussi Shinichi Enami Akihiro Yabushita Michael R Hoffmann Wei-Guang Liu Himanshu Mishra William A Goddard

In tropospheric chemistry, secondary organic aerosol (SOA) is deemed an end product. Here, on the basis of new evidence, we make the case that SOA is a key reactive intermediate. We present laboratory results on the catalysis by carboxylate anions of the disproportionation of NO2 'on water': 2NO2 + H2O = HONO + NO(9-) + H+ (R1), and supporting quantum chemical calculations, which we apply to re...

Journal: :Journal of neurochemistry 2005
Z Xie M E Harris-White P A Wals S A Frautschy C E Finch T E Morgan

Apolipoprotein J (apoJ; also known as clusterin and sulfated glycoprotein (SGP)-2) is associated with senile plaques in degenerating regions of Alzheimer's disease brains, where activated microglia are also prominent. We show a functional link between apoJ and activated microglia by demonstrating that exogenous apoJ activates rodent microglia in vivo and in vitro. Intracerebroventricular infusi...

Journal: :Atmospheric Chemistry and Physics 2021

Abstract. Forest fires are major contributors of reactive gas- and particle-phase organic compounds to the atmosphere. We used offline high-resolution tandem mass spectrometry perform a molecular-level speciation sampled via aircraft from an evolving boreal forest fire smoke plume in Saskatchewan, Canada. observed diverse multifunctional containing oxygen, nitrogen, sulfur (CHONS), whose struct...

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