the alkaline aluminum hydrogen peroxide battery
Báo cáo khoa học: Glucose oxidase prevents programmed cell death of the silkworm anterior silk gland through hydrogen peroxide production ppt
... from which GOD generates hydrogen peroxide The available amount of trehalose, and therefore glucose, may be limited and may therefore limit the hydrogen peroxide present in the cavity ASGs at noon ... inhibited (Fig 4C), supporting the notion that hydrogen peroxide is the factor that inhibits PCD During the incubation of V3 ASGs, the concentration of hydrogen peroxide increased, and reached ... contrast, the presence of catalase inhibited the increase in hydrogen peroxide concentration throughout the incubation period Combining these observations, we concluded that the production of hydrogen...
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Effect of hydrogen peroxide on the destruction of organic contaminants synergism and inhibition in a con
... considering the cost of hydrogen peroxide, the authors suggested that the optimum hydrogen peroxide was at mM Cornish et al reported an optimum concentration of hydrogen peroxide on the photocatalytic ... of oxygen in the reaction solution, the magnitude of the intensity and wavelength of the UV light, the desirable extent of treatment, and the cost of hydrogen peroxide Nevertheless, the fact that ... investigated the role of alternative electron acceptors, including hydrogen peroxide [29–38] Hydrogen peroxide, the simplest of the peroxides, is an important precursor in chemical synthesis [39,40]...
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Báo cáo khóa học: Mechanistic insight into the peroxidase catalyzed nitration of tyrosine derivatives by nitrite and hydrogen peroxide doc
... observed The nitration is instead observed if hydrogen peroxide is added together with the substrate These ndings indicate that, during the transformation, all the peroxide is consumed When the experiment ... length, hydrogen peroxide (0.2 mM) was added to the xed nal volume of 1.6 mL The progress of the reaction was followed by monitoring the absorbance changes at 322 nm due to the formation of the oxidative ... competes with the degradation The interaction of the protein with the substrate can precede the interaction with peroxide and even with nitrite, without altering the essence of the mechanism...
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Decolorization of Dye with Iron Oxide Catalysed Decomposition of Hydrogen Peroxide
... CONCLUSION The removal of dye (Reactive Red 6) in hydrogen peroxide/ iron oxide (FeOOH) system was investigated We have following conclusions The FeOOH had the best catalytic effect on hydrogen peroxide ... The hydrogen peroxide decomposition by FeOOH followed a first order reaction with the H2O2 and FeOOH concentration The rate of dye removal under the presence of H2O2 was not proportional to the ... (hr) 20 25 Figure The effect of pH on the H2O2 Figure The effect of pH on the dye decomposition removal ([H2O2]0 = 20 mM, FeOOH = 0.5 g/L, [dye]0 ≈ 100 mg/L) The effect of pH on the H2O2 decomposition...
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Báo cáo khoa học: Production and utilization of hydrogen peroxide associated with melanogenesis and tyrosinase-mediated oxidations of DOPA and dopamine docx
... enhanced by the endogenously generated H2O2, and by at least one other reactive intermediate of oxygen (ROI) The results of this investigation support studies implicating the involvement of these potentially ... In these experiments, varying amounts of dopamine were introduced into reaction mixtures and then monitored by the free radical detector With resveratrol, there was a significant decrease in the ... apparently successfully circumvented by the enzyme employing these molecules to metabolizing substrates A likely scenario for the production of these molecules involves the partial reduction of O2 caused...
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Báo cáo khoa học: Mammalian 105 kDa heat shock family proteins suppress hydrogen peroxide-induced apoptosis through a p38 MAPK-dependent mitochondrial pathway in HeLa cells potx
... released into the cytoplasm (B) HeLa-tet ⁄ Hsp105 cells were exposed to 0.5 mM H2O2 for h, and then the cells were further incubated in fresh medium at 37 °C for h The cells were then harvested, ... min, then further incubated in fresh medium with or without 10 lM SB203580 or 10 lM SP600125 at 37 °C for h Then the cells were stained with Hoechst 33342 and the nuclear morphology of the cells ... (Fig 5B) However, in the cells treated with H2O2, the amount of cytochrome c increased in the soluble fraction concomitant with its decrease in the particulate fraction The release of cytochrome...
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Báo cáo khoa học: An inserted loop region of stromal ascorbate peroxidase is involved in its hydrogen peroxide-mediated inactivation pot
... raised the hypothesis that a region within the C-terminal half of the chloroplastic APXs is involved in their susceptibility to hydrogen peroxide Results Preparation of chimeric APXs To test the ... property has the advantage of allowing a precise comparison of the susceptibility of various chimeric APXs to hydrogen peroxide; the concentration of generated hydrogen peroxide and the rate of ... to 407 nm, lying in the range between those of the APX-B and the stromal APX of spinach On the basis of these results, we judged that these APX samples could be used for the following experiments...
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Báo cáo khoa học: Microperoxidase 8 catalysed nitrogen oxides formation from oxidation of N-hydroxyguanidines by hydrogen peroxide ppt
... not shown) The effect of changing the pH of the reaction medium on the efciency and selectivity of the reaction of in the presence of MP8 and H2O2 was also investigated Increasing the pH from ... unambiguously the unknown product using our RP-HPLC system coupled to a mass spectrometer, operating either in the positive or in the negative mode in the 1001000 mass range (data not shown) Aliquots of the ... on the reaction efciency and selectivity, indicating that neither OHặ nor free iron were directly involved in the formation of cyanamide Furthermore, implication of the iron atom of MP8 in the...
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control of the anodic aluminum oxide barrier layer opening
... observed.22 While these images may represent the true shape of the hole, especially at the smaller diameters, there is also the possibility that there is a convolution between the AFM tip and hole ... approximated by Stokes law, 6πηrυ, where z is the charge on the ion, e the electronic charge, η the viscosity of the medium, and r the radius of the ion.29 Combining the two formulas gives µ) Figure (a) ... of the gold did not fully adhere to the Si substrate prior to removal of the AAO mask Further studies into the masking process should improve the yield and uniformity of the nanodot array These...
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Báo cáo khoa học: Hydrogen peroxide efflux from muscle mitochondria underestimates matrix superoxide production – a correction using glutathione depletion pptx
... underestimation of matrix superoxide production by the extramitochondrial H2O2 assay The experiments reported in the present study were developed to investigate the hypothesis that the intramitochondrial ... directly increased complex I superoxide production The results obtained in these experiments, together with the SMP data, although not ‘correction values’ themselves, support the contention that H2O2 ... underestimation of the CDNB-pretreated rate) The same is probably true for superoxide production by mitochondria from other sources, although the extent of the correction for other mitochondria...
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Re-Evaluation of Some Organic Chemicals, Hydrazine and Hydrogen Peroxide potx
... promoting activity of hydrogen peroxide 5.4 Other relevant data Hydrogen peroxide is formed intracellularly as a result of certain enzymatic reactions Hydrogen peroxide, either from this source ... for the carcinogenicity of hydrogen peroxide There is limited evidence in experimental animals for the carcinogenicity of hydrogen peroxide Overall evaluation Hydrogen peroxide is not classifiable ... strongest in the largest of the studies, which had one of the most intensive exposure assessment protocols, but the other studies gave either negative or only weakly supportive results Even in the largest...
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RE-EVALUATION OF SOME ORGANIC CHEMICALS, HYDRAZINE AND HYDROGEN PEROXIDE ppt
... (ii) to select the data relevant for the evaluation on the basis of scientific merit; (iii) to prepare accurate summaries of the data to enable the reader to follow the reasoning of the Working ... days to discuss and finalize the texts of the monographs and to formulate the evaluations After the meeting, the master copy of each monograph is verified by consulting the original literature, edited ... indicated as they appear in the original report; units are converted when necessary for easier comparison The Working Group may conduct additional analyses of the published data and use them in their...
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Báo cáo khoa học: Enhanced sensitivity to hydrogen peroxide-induced apoptosis in Evi1 transformed Rat1 fibroblasts due to repression of carbonic anhydrase III docx
... cells, together with the control vector pRLCMV The activity of p-1485 ⁄ +55 caIII luc in the various cell types, normalized for pRLCMV activity, is shown in Fig 6A The results showed that the caIII ... perhaps other forms either have no effect or the opposite effect to the full-length form Some studies have shown that the MDS1 ⁄ EVI1 isoform has FEBS Journal 277 (2010) 441–452 ª 2009 The Authors ... coenzyme Q10, glutathione and carotene [14] If the amount of ROS exceeds the capacity of the antioxidant machinery, then oxidative stress occurs [15] The enzyme carbonic anhydrase III (caIII) (EC...
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the reaction of acetone & peroxide
... HOOR represents hydrogen peroxide; for adduct 111, HOOR represents adduct I1 itself The similarity in the chemistry of these two reactions is reflected in the similarity of the thermodynamic parameters ... peroxide have not been investigated Further, little is known about the equilibria between the several species We have studied the different stages of the hydrogen peroxide- acetone interaction in (necessarily) ... on hydrogen peroxide concentration was studied at 24”, at constant pH and in the absence of any other acid It was found that the rate law followed by the reaction is the same as the law derived...
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Báo cáo hóa học: " Involvement of intracellular free Ca2+ in enhanced release of herpes simplex virus by hydrogen peroxide" ppt
... study, we examined the possibility that H2O2 could affect [Ca2+]i in HSV-1-infected epithelial cells The results suggest that H2O2 is the candidate to promote the release of HSV-1 at the site of viral ... this condition, the amount of cell-free virus was 150% of that in the untreated control, whereas it was increased to 450% of the control value by the treatment with H2O2 (Fig 3A) The amounts of ... viral particles pooled in the space were lost (Fig 7C) Although the integrity of most of the plasma membrane was preserved, there were bubble-like structures that arose from the cell membrane (Fig...
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Influence of polymer additive on the performance of lead-acid battery negative plates ppt
... of the battery with PASP in the Fig SEM micrograph of the surface of the negative plate at the end of HRPSoC tests: (a) R-cell, (b) 0.2 wt.% PASP in the electrolyte and (c) 0.1 wt.% PASP in the ... crystals The addition of PASP to the paste and to the electrolyte improves the utilization of the negative active material and reduces the internal resistance of the negative plate The results ... that addition of PASP to the electrolyte increases the number of partial charge–discharge cycles from 1060 for the R -battery to 1360 cycles for the battery with PASP in the electrolyte Addition...
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Báo cáo nghiên cứu khoa học: " EXPERIMENTAL AND THEORETICAL ANALYSIS OF A CRITICAL CHEMICAL REACTION: DECOMPOSITION OF HYDROGEN PEROXIDE (H2O2)" potx
... (1) The influences of hydrogen peroxide and catalyst concentration and of the initial temperature of the reactor on the reaction rate and the heat flow behavior were evaluated The hydrogen peroxide ... means that the composition in any point of the reactor is equal and so the properties of the mixture inside the reactor are the same as in the outflow With the characteristics above, the mass balance ... experiments and These were also the experiments that present the worst optimization results The values for the amount of catalyst added and for the concentration of hydrogen peroxide were the highest...
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KHẢO SÁT SIÊU ÂM LÒNG HẬU MÔN VỚI HYDROGEN PEROXIDE TRONG BỆNH RÒ HẬU MÔN VÀ RÒ HẬU MÔN - ÂM ĐẠO doc
... the great role in diagnosis of ano-rectal diseases, particularly anal fistulas The endoanal ultrasonography with hydrogen peroxide is able to establish the relation between the fistulas and the ... were the gold standards Results: in 132 patients (109 males, 23 females, mean age 49.67), there were a variety of anal and ano-vaginal fistulas The endoanal sonography was able to identify the ... operation results the exact of endoanal ultrasonography with hydrogen peroxide in diagnosis of anal fistulas was 96.2% MỞ ĐẦU Phẫu thuật điều trị bệnh rò hậu môn khác tùy theo loại rò(14) Việc...
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Báo cáo y học: "HIV-1 Nef increases astrocyte sensitivity towards exogenous hydrogen peroxide" potx
... such as hydrogen peroxide [25] Yet astrocytes are more vulnerable to the effects of hydrogen peroxide than neurons [26,27], but it is not known how this is modulated by HIV-1 Nef Therefore, the sensitivity ... FCS for a further 48 h The medium was then exchanged and cell viability assay was performed as described in the Methods section The relative fluorescence represents the ratio of the fluorescence ... containing 10% FCS for a further 24 h The medium was then exchanged and cell viability assay was performed as described in the Material section The times indicated are relative to the moment of adding...
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Báo cáo khoa học: " Evaluation of LHP® (1% hydrogen peroxide) cream versus petrolatum and untreated controls in open wounds in healthy horses: a randomized, blinded control study" pdf
... effect of LHP® (1% hydrogen peroxide) cream on wound healing was shown However, we not know whether this effect could be associated with the hydrogen peroxide content of the cream or the cream base ... study a release of hydrogen peroxide from the LHP® cream resulted in a continuous low level hydrogen peroxide concentration in the wound areas which could have a positive effect on the intensity of ... increased when higher concentration of hydrogen peroxide was used [18] It is possible that an increased blood flow in the wounds induced by the hydrogen peroxide in the LHP® cream could have contributed...
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