scholarly journals Enhanced photocatalytic removal of nitric oxide over Ag-decorated ZnSn(OH)6 microcubes

2021 ◽  
Author(s):  
Minh-Thuan Pham ◽  
Nguyen Thi Van ◽  
Truc-Mai Thi Nguyen ◽  
Hong-Huy Tran ◽  
Hieu Trung Nguyen ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Ag Nanoparticles ◽  
Resonance Effect ◽  
No Removal ◽  
Resonance Analysis ◽  
Spin Resonance ◽  
Photocatalytic Removal ◽  
Severe Climate Change ◽  
Apparent Quantum Efficiency ◽  
By Products

Abstract Presently, most of the population has been facing a string of severe climate change problems that primarily come from the intensive emission of nitric oxide (NO), which requires a practical approach to sustain our living conditions. Herein, Ag nanoparticles-decorated ZnSn(OH)6 microcubes (Ag:cZHS) photocatalysts were synthesized rapidly and used for photocatalytic NO removal under solar light activation. The properties of the newly prepared photocatalysts are comprehensively characterized by a series of routine methods. The NO removal performance over the ZnSn(OH)6 microcubes (c:ZHS) photocatalysts was increased markedly upon being combined with Ag nanoparticles through the surface plasmon resonance effect. The contribution of e−, h+, •OH, and •O2 was extensively investigated through trapping tests and electron spin resonance analysis (ESR). Also, the by-products and apparent quantum efficiency of the cZHS photocatalysts were studied.

Double resonance effect on multiphoton ionization process of nitric oxide

1982 ◽  
Vol 86 (5-6) ◽  
pp. 445-448 ◽  
Author(s):  
Takayuki Ebata ◽  
Haruo Abe ◽  
Naohiko Mikami ◽  
Mitsuo Ito
Keyword(s):  
Nitric Oxide ◽  
Resonance Effect ◽  
Double Resonance ◽  
Multiphoton Ionization ◽  
Ionization Process

Electron spin resonance analysis of sputtering-induced defects in advanced low-κ insulators (κ=2.0–2.5)

2013 ◽  
Vol 109 ◽  
pp. 240-243
Author(s):  
A. Stesmans ◽  
A.P.D. Nguyen ◽  
M. Houssa ◽  
V.V. Afanas’ev ◽  
Zs. Tőkei ◽  
...  
Keyword(s):  
Electron Spin Resonance ◽  
Electron Spin ◽  
Resonance Analysis ◽  
Spin Resonance ◽  
Induced Defects

scholarly journals Photocatalytic removal of nitric oxide by Bi2Mo3O12 prepared by co-precipitation method

2013 ◽  
Vol 468 ◽  
pp. 322-326 ◽  
Author(s):  
E. Luévano-Hipólito ◽  
A. Martínez-de la Cruz ◽  
Q.L. Yu ◽  
H.J.H. Brouwers
Keyword(s):  
Nitric Oxide ◽  
Precipitation Method ◽  
Photocatalytic Removal ◽  
Co Precipitation

scholarly journals Membrane fluidity changes accompanying phagocytosis in normal and in chronic granulomatous disease polymorphonuclear leukocytes

Blood ◽  
1981 ◽  
Vol 58 (4) ◽  
pp. 830-835 ◽  
Author(s):  
LM Ingraham ◽  
LA Boxer ◽  
RA Haak ◽  
RL Baehner
Keyword(s):  
Membrane Fluidity ◽  
Polymorphonuclear Leukocytes ◽  
Direct Reduction ◽  
Normal Subjects ◽  
Esr Spectra ◽  
Resting Cells ◽  
Opsonized Zymosan ◽  
Acid Analog ◽  
Spin Resonance ◽  
By Products

Abstract We have studied membrane fluidity changes in polymorphonuclear leukocytes (PMN) during phagocytosis. Membrane fluidity was assessed by electron spin resonance (ESR) using a nitroxide-substituted stearic acid analog (5DS) as a spin probe. PMN from normal subjects and from 3 CGD patients (2 males, 1 female) were incubated in Kreb's Ringers phosphate with or without opsonized zymosan. ESR spectra were obtained and the order parameter (S), which is inversely related to membrane fluidity, was calculated. Without zymosan addition, S for normal (0.638) and for CGD (0.635) were not significantly different (p less than 0.35). The S values indicate that under resting conditions the molecular environment of the CGD membrane is similar to that of normal PMN membranes. However, with addition of opsonized zymosan, the normal, but not the CGD, PMN showed a significant increase (CGD, S = 0.638; normal, S = 0.647; p less than 0.001). This change in S for the normals is consistent with a more restricted movement of 5DS. Treatment of normal PMN with a mixture of scavengers specific for H2O2 (catalase, 1600 U/ml), O2-.(superoxide dismutase, 100 micrograms/ml), and for HO., (sodium benzoate, 1mM) during zymosan stimulation gave S values similar to those of resting cells. Catalase alone also lowered S value, suggesting that H2O2 was instrumental in causing the initial S value increase. This idea was supported by studies in which CGD cells were incubated with zymosan in the presence of glucose oxidase, an enzyme that catalyzes glucose oxidation resulting in the direct reduction of molecular oxygen to H2O2. Our results indicate that reduced O2 by- products, particularly H2O2, can cause altered biophysical properties of PMN membrane during phagocytosis.

Modulation of glucose metabolism in macrophages by products of nitric oxide synthase

1993 ◽  
Vol 264 (6) ◽  
pp. C1594-C1599 ◽  
Author(s):  
J. E. Albina ◽  
B. Mastrofrancesco
Keyword(s):  
Nitric Oxide ◽  
Glucose Metabolism ◽  
Oxidative Metabolism ◽  
Culture Media ◽  
Tricarboxylic Acid Cycle ◽  
Specific Inhibitor ◽  
Tricarboxylic Acid ◽  
Acid Cycle ◽  
The Impact ◽  
By Products

Nitric oxide (NO) is a product of L-arginine metabolism that suppresses cellular oxidative metabolism through the inhibition of tricarboxylic acid cycle and electron transport chain enzymes. The impact of NO synthase (NOS) activity on specific pathways of glucose metabolism in freshly harvested and overnight-cultured rat resident peritoneal macrophages, at rest and after stimulation with zymosan, was investigated using radiolabeled glucose. NOS activity was modulated through the L-arginine concentration in culture media and the use of its specific inhibitor, NG-monomethyl-L-arginine, and quantitated using radiolabeled L-arginine. Results demonstrated that NOS activity was associated with increased glucose disappearance, glycolysis, and hexose monophosphate shunt activity and, in line with the known inhibition of oxidative metabolism associated with the production of NO, with a decrease in the flux of glucose and butyrate carbon through the tricarboxylic acid cycle. In addition, the relative increase in glucose utilization that follows zymosan stimulation was enhanced by treatments that suppressed NOS activity. These results demonstrate that the characteristics of glucose metabolism by macrophages are, to a significant extent, determined by products of NOS.

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