Aromatic hydroxylation using an oxo-bridged diiron(iii) complex: a bio-inspired functional model of toluene monooxygenases

2015 ◽  
Vol 44 (39) ◽  
pp. 17261-17267 ◽  
Author(s):  
Ambica Kejriwal ◽  
Pinaki Bandyopadhyay ◽  
Achintesh N. Biswas
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Functional Model ◽  
Aromatic Hydroxylation

Aromatic hydroxylation catalyzed by a nonheme diiron(iii) complex with hydrogen peroxide at room temperature is described.

scholarly journals A Mn(iii) polyoxotungstate in the oxidation of organosulfur compounds by H2O2 at room temperature: an environmentally safe catalytic approach

2016 ◽  
Vol 6 (9) ◽  
pp. 3271-3278 ◽  
Author(s):  
Tiago A. G. Duarte ◽  
Sónia M. G. Pires ◽  
Isabel C. M. S. Santos ◽  
Mário M. Q. Simões ◽  
M. Graça P. M. S. Neves ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Organosulfur Compounds ◽  
Keggin Type ◽  
Environmentally Safe

A manganese monosubstituted Keggin-type polyoxometalate was used as a catalyst in the oxidation of recalcitrant organosulfur compounds by hydrogen peroxide at room temperature.

scholarly journals Studies on the Preservation of Raw Cow’s Milk by Chemical Method

1970 ◽  
Vol 42 (3) ◽  
pp. 317-326 ◽  
Author(s):  
F Rokhsana ◽  
UK Das ◽  
R Yeasmin ◽  
A Nahar ◽  
S Parveen
Keyword(s):  
Hydrogen Peroxide ◽  
Chemical Method ◽  
Room Temperature ◽  
Storage Period ◽  
Total Coliform ◽  
Human Consumption ◽  
Milk Products ◽  
E Coli ◽  
Keeping Quality ◽  
Control Milk

Studies carried out to develop a technique for the preservation of cow's milk in raw condition using hydrogen peroxide (H2O2) as a preservative. Fresh cow’s milk was collected and experiments were conducted by four treatments in order to achieve the optimum condition of storage. The treatments were with various concentration of H2O2 starting from 0.05 %, 0.1 %, 0.2 %, 0.3 %, 0.4 %, & 0.5 %. Treated milk with 0.05 % concentration of H2O2 had storage period of 20 days compared to that of the control one (5 days only) in refrigerated temperature (±8°C). On the other hand hydrogen peroxide treated milk (0.05 %) had a storage period of 8 hours at room temperature (±28°C). Results also showed that the higher concentration of H2O2 had no effect on storage period than that of control. Milk products like kheer and halawa prepared by treated milk and stored for 20 days showed almost nil growth of total coliform and E. coli which means that food products prepared from hydrogen peroxide treated milk is safe for human consumption. Key words: Raw, Storage, Hydrogen peroxide, Preservative, keeping quality, Pasteurization, deteriorated, MPN. Bangladesh J. Sci. Ind. Res. 42(3), 317-326, 2007

scholarly journals Formation of Water-Soluble Fullerenes [C60,C70] under Ultrasonication and Antioxidant Effect

2017 ◽  
Vol 5 (1) ◽  
pp. 61
Author(s):  
Weon-Bae Ko ◽  
Hong-Seok Jeong ◽  
Sung-Ho Hwang
Keyword(s):  
Hydrogen Peroxide ◽  
Room Temperature ◽  
Antioxidant Effect ◽  
Water Soluble ◽  
Maldi Tof Ms ◽  
Pc 12 Cells ◽  
Effect Of Water ◽  
Maldi Tof ◽  
Line Following ◽  
Tof Ms

<p>The water-soluble fullerenes [C<sub>60</sub>, C<sub>70</sub>] are prepared with fullerenes [C<sub>60</sub>, C<sub>70</sub>] and a mixture of oxidants (v/v) at the ratio of 3:1 under ultrasonic condition at room temperature. The MALDI-TOF MS confirmed that the water-soluble compounds were C<sub>60</sub> and C<sub>70</sub>. The antioxidant effect of water-soluble fullerenes [C<sub>60</sub>, C<sub>70</sub>] in the PC 12 cells (Rat pheochromocytoma) line following exposure to hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) was investigated.</p>

Abstract 355: Effect of Poloxamer 188 on Rat Brain Isolated Mitochondria After Exposure to Hydrogen Peroxide

Circulation ◽  
2019 ◽  
Vol 140 (Suppl_2) ◽  
Author(s):  
Johannes A Pille ◽  
Michele M Salzman ◽  
Anna A Sonju ◽  
Felicia P Lotze ◽  
Josephine E Hees ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Consumption ◽  
Mitochondrial Function ◽  
Complex I ◽  
Room Temperature ◽  
In Vitro Model ◽  
Atp Synthesis ◽  
Complex Ii ◽  
Vitro Model

Introduction: In a pig model of myocardial infarction (MI), intracoronary delivered Poloxamer (P) 188 significantly reduces ischemia/reperfusion (IR) injury when given immediately upon reperfusion, with improved mitochondrial function as a predominant effect. As mitochondria are heavily damaged during IR, a direct effect of P188 on mitochondria may lead to better therapy options during reperfusion. To show not only a similar reduction of IR injury by P188 in the brain, but also a direct P188 effect on mitochondria, we established an in-vitro model of IR that consists of damaging isolated rat brain mitochondria with hydrogen peroxide (H 2 O 2 ), one component of ischemia, then applying P188, and analyzing mitochondrial function. Methods: Male Sprague-Dawley rat brains were removed, and the mitochondria isolated by differential centrifugation and Percoll gradients, then kept on ice to slow their bioenergetics prior to any experimental treatments. Mitochondria were exposed to 200 μM H 2 O 2 for 10 min at room temperature with slight agitation; controls received no H 2 O 2 . Samples were then diluted ½ with buffer ± P188 (250 μM after dilution) to simulate reperfusion and treatment, and kept at room temperature for 10 further minutes. ATP synthesis was measured in a luminometer using a luciferase enzymatic assay. Oxygen consumption was measured by closed cell respirometry with an oxygen meter. In both assays, Complex I and Complex II were examined; Complex I substrates glutamate and malate, Complex II substrate succinate plus the Complex I inhibitor rotenone. Statistics: Data are expressed as mean ± SEM. One-Way ANOVA, SNK-Test; Kruskal-Wallis-Test; α=0.05, * vs control. Results: In both Complex I and II, mitochondrial function was significantly impaired by H 2 O 2 , with ATP synthesis affected more at Complex I and oxygen consumption affected more at Complex II. Addition of P188 did not provide any significant improvement in mitochondrial function. Conclusions: Although P188 significantly reduced IR injury when given during reperfusion in a pig model of MI, it does not appear to provide direct protection to mitochondria in this in-vitro model. Whether the exposure to H 2 O 2 causes the appropriate injury for P188 to become effective remains to be elucidated.

Preparation of Ag@zeolitic imidazolate framework-67 at room temperature for electrochemical sensing of hydrogen peroxide

The Analyst ◽  
2019 ◽  
Vol 144 (2) ◽  
pp. 521-529 ◽  
Author(s):  
Yuhua Dong ◽  
Chengqian Duan ◽  
Qinglin Sheng ◽  
Jianbin Zheng
Keyword(s):  
Hydrogen Peroxide ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Room Temperature ◽  
Electrochemical Sensing ◽  
Carbon Electrode ◽  
Zeolitic Imidazolate Framework ◽  
Simple Method ◽  
Hydrogen Peroxide Sensor

In this work, a novel non-enzymatic hydrogen peroxide sensor, Ag@zeolitic imidazolate framework-67 (Ag@ZIF-67)/glassy carbon electrode (GCE), was fabricated by a simple method at room temperature.

scholarly journals Tin Chloride Catalysed Oxidation of Acetone with Hydrogen Peroxide to Tetrameric Acetone Peroxide

1999 ◽  
Vol 23 (4) ◽  
pp. 288-289
Author(s):  
Heng Jiang ◽  
Gang Chu ◽  
Hong Gong ◽  
Qingdong Qiao
Keyword(s):  
Hydrogen Peroxide ◽  
Molecular Weight ◽  
Elemental Analysis ◽  
Room Temperature ◽  
Molecular Weight Determination ◽  
Tin Chloride ◽  
Catalysed Oxidation ◽  
Acetone Peroxide

SnCl4·5H2O and SnCl2·2H2O are efficient catalysts for the oxidation of acetone with 30% hydrogen peroxide at room temperature and produce tetrameric acetone peroxide which is identified by molecular weight determination, elemental analysis, FTIR, NMR and MS.

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