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Peroxides (2):
Recent article
Peroxides
Abstract
These results demonstrate that oxygen-generating nanofibers can be designed and developed to provide a short-term peroxide-based antimicrobial response while still maintaining attractive tissue-integration properties....
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PMID: 21155527
PDF is available here.
PDF is available here.
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Abstract
We investigated the role of active site residues in the peroxidase activity of Orp1 (GPx3) using three different peroxide substrates. Using a structural homology model of the reduced form of Orp1, we identified Asn126 and Phe127 as evolutionarily conserved residues that line the back of the Orp1 act...
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PMID: 21036150
PDF is available here.
PDF is available here.
Abstract
Asthma and atherosclerosis are both chronic inflammatory diseases. The progression of the inflammation in asthmatic patients is known to be similar to the increased development of atherosclerosis.
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PMID: 21337909
PDF is available here.
PDF is available here.
Abstract
Polymer additive migration into a food product is dependent upon numerous factors including the original concentration of the additive in the polymer, its solubility in the food, its diffusion coefficient in the polymer, its partition coefficient between the polymer and food, temperature, and time....
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PMID: 20672204
PDF is available here.
PDF is available here.
Abstract
The present study deals with the quantitative effect of vehicular emission on ambient air quality during May 2006 in urban area of Lucknow city. In this study SPM, RSPM, SO2, NOx and 7 trace metals associated with RSPM were estimated at 10 representative locations in urban area and one village area f...
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PMID: 21506475
PDF is available here.
PDF is available here.
Abstract
Enamel surface microhardness significantly decreased after bleaching with nonenhanced 10% CP (WHI). The chemical analyses suggest F uptake promoted by high-concentrate F bleaching gels (CPF, OPA, and PN) and a F loss with nonenhanced 10% CP bleaching gels (PLA, WHI). CP agent enhanced with Ca (CPCa)...
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PMID: 20657849
PDF is available here.
PDF is available here.
Pediatric Research (68)3 2010
Abstract
Failure to protect total parenteral nutrition (TPN) from ambient light exacerbates the generation of peroxides, which affects blood glucose and plasma triacylglyceride (TG) in neonates. Based on the concept that the origin of adult diseases can be traced back to perinatal life, it was hypothesized t...
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PMID: 20543762
PDF is available here.
PDF is available here.
Abstract
Dental Materials Journal (29)4 2010
Abstract
Chemical cleansing by denture cleansers is the first choice for denture plaque control of tissue conditioners. This study evaluated the influences of denture cleansers on the surface quality of tissue conditioners by determining surface roughness and porosity. Three tissue conditioners (Hydro-Cast,...
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PMID: 20647639
PDF is available here.
PDF is available here.
Abstract
Boron is reported in this study to stabilize the structure of heme proteins exposed to peroxides. The oxidized heme protein (15 microM) was treated with H(2)O(2) (10mM) in 1M glycine-NaOH buffer (pH 9.2) at 25 degrees C in absence/presence of boron, and characterized by visible absorption spectrosco...
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PMID: 20576510
PDF is available here.
PDF is available here.
Abstract
We have assessed the effect of CuB on pancreatic cancer cells.
The growth of human pancreatic cancer cells (PANC-1) was monitored using a 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide assay. Cell cycle distribution and apoptosis were evaluated with fluorescence-activated cell sorter...
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PMID: 20182390
PDF is available here.
PDF is available here.
Pharmaceutical Research (27)8 2010
Abstract
The present study aimed to develop a high-throughput screening strategy for predicting the phototoxic potential of pharmaceutical substances, using a derivatives-of-reactive-oxygen-metabolites (D-ROM) assay.
The assay conditions of the D-ROM assay were optimized with...
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PMID: 20422261
PDF is available here.
PDF is available here.
Analyst (Cambridge UK) (135)8 2010
Abstract
The two members of peroxide-based explosives, triacetone triperoxide (TATP) and hexamethylene triperoxide diamine (HMTD), can be manufactured from readily accessible reagents, and are difficult to detect by conventional analytical methods. TATP and HMTD were securely synthesized, taken up with aceto...
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PMID: 20532268
PDF is available here.
PDF is available here.
Abstract
Nightguard vital bleaching (NGVB) has been applied as a safe and effective bleaching procedure with a wide variety of commercial products consisting of carbamide peroxide-based gels, but there have been few reports on tooth bleaching for tetracycline-stained teeth. The purpose of this study was to e...
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PMID: 20652791
PDF is available here.
PDF is available here.
Abstract
We hypothesized that ascorbylperoxide is the active agent leading to high TG. The aim was to investigate the role of ascorbylperoxide in glucose and lipid metabolism in an animal model of neonatal parenteral nutrition. Three-day-old guinea pigs received through a catheter in the jugular solutions co...
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PMID: 20375199
PDF is available here.
PDF is available here.
Journal of Hazardous Materials (178)1-3 2010
Abstract
Dye degradation using advanced oxidation processes with Co(2+)/H(2)O(2) and Co(2+)/peroxymonosulfate (PMS) systems has been investigated. Two types of dyes, basic blue 9 and acid red 183, were employed. Several parameters affecting dye degradation such as Co(2+), PMS, H(2)O(2), and dye concentration...
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PMID: 20144502
PDF is available here.
PDF is available here.
Abstract
We determined the ability of extracts and active components isolated from nine medicinal plants, Poncirus trifoliata, Astragalus membranaceus, Magnolia obovata, Salvia miltiorrhiza, Angelica dahurica, Cornus officinalis, Cnidium officinale, Pueraria lobata and Ostericum koreanum, to neutralize perox...
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PMID: 20607491
PDF is available here.
PDF is available here.
Abstract
We found a significant decrease for malondialdehyde and higher values of glutathione peroxidase measurements in the plasma and BAL during propofol anaesthesia. Significantly higher levels of malondialdehyde and lower concentrations of glutathione peroxidase in plasma and BAL were found during sevofl...
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PMID: 20442581
PDF is available here.
PDF is available here.
Abstract
G5 exhibited the greatest penetration, while G2 and G3 produced the lowest values. All bleaching agents penetrated from the pulp chamber to the external root surface. There was a direct correlation between the presence of oxidative agents and penetration potential. Sodium perborate in distilled wate...
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PMID: 20718216
PDF is available here.
PDF is available here.
Neurotoxicity Research (17)4 2010
Abstract
We have shown that microglia activated by lipopolysaccharides (LPS) induce the expression of antioxidative enzymes in astrocytes and render them more resistant to hydrogen peroxide (H2O2). In this study, we examined the mechanisms involved with respect to the cellular action of different peroxides,...
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PMID: 19763738
PDF is available here.
PDF is available here.
Abstract
Our findings clearly showed that cocaine promoted skin oxidation via the involvement of the enzymes inducible nitric oxide synthase (iNOS) and xanthine oxidase (XO). Cocaine administration significantly increased iNOS expression in rats' skin. It also decreased total scavenging capacity (TSC), as we...
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PMID: 20399619
PDF is available here.
PDF is available here.
Abstract
Hydroperoxides are major products of the reactions of radicals and singlet oxygen with amino acids, peptides, and proteins. These species can generate radicals in the presence of metal ions and oxidize thiols via nonradical reactions, but the effects of these materials on cells are poorly understood...
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PMID: 20109544
PDF is available here.
PDF is available here.
Abstract
We postulate that lipid-derived radicals mediate the one-electron oxidation of tyrosine to (*)Tyr, which can afterward react with another (*)Tyr or with nitrogen dioxide ((*)NO(2)) to yield 3,3'-dityrosine or 3-nitrotyrosine within the hydrophobic structure, respectively. To test this hypothesis, we...
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PMID: 20170094
PDF is available here.
PDF is available here.
Abstract
We analyze nighttime ClO measurements from the National Aeronautics and Space Administration Aura Microwave Limb Sounder (MLS) to infer an expression for K(eq). Although the observed temperature dependence of the nighttime ClO is in line with the theoretical ClO/ClOOCl equilibrium relationship, none...
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PMID: 20388911
PDF is available here.
PDF is available here.
Abstract
The 16% CP cause a significant decrease in MDPC-23 cell viability and 10% SA was able to partially prevent the toxic effects of CP.
Copyright 2010 Mosby, Inc. All rights reserved....
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PMID: 20303050
PDF is available here.
PDF is available here.
Abstract
The first synthesis of the marine endoperoxide 9,10-dihydroplakortin, of its C10-desethyl analogue, and of their corresponding C6 epimers is described. Stereogenic centers at C4 and at the lateral chain have been stereoselectively synthesized through Evans' chiral auxiliary chemistry. Moreover, the...
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PMID: 20199093
PDF is available here.
PDF is available here.
Inorganic Chemistry (49)7 2010
Abstract
In this study, a combined spectroscopic and computational approach has been employed to generate a detailed description of the electronic structure of a binuclear side-on disulfido (Ni(II))(2) complex, [{(PhTt(tBu))Ni}(2)(mu-eta(2):eta(2)-S(2))] (1, where PhTt(tBu) = phenyltris[(tert-butylthio)methy...
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PMID: 20199100
PDF is available here.
PDF is available here.
Inorganic Chemistry (49)7 2010
Abstract
We have characterized a trans-mu-1,2-disulfido-bridged dinickel(II) species, [{(tmc)Ni}(2)(S(2))](2+) (1, tmc = 1,4,8,11-tetramethyl-1,4,8,11-tetraazacyclotetradecane) by using electronic absorption, magnetic circular dichroism (MCD), and resonance Raman (rR) spectroscopic techniques, as well as den...
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PMID: 20199095
PDF is available here.
PDF is available here.
Abstract
This review summarizes the analytical approaches reported in the literature relating to epoxide and hydroperoxide impurities. It is intended that it should provide guidance for analysts faced by the need to control such impurities, particularly where this is due to concerns relating to their potenti...
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PMID: 20031361
PDF is available here.
PDF is available here.
Archives of Oral Biology (55)4 2010
Abstract
Colour modification of tooth enamel has proven successful, but it is unclear how various bleaching applications affect micro-structural integrity of the whitened enamel. To investigate the internal structural integrity of human intact tooth enamel with the application of two commonly used whitening...
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PMID: 20338548
PDF is available here.
PDF is available here.
Abstract
The aim of present study was to develop a simple method on UV spectrometer for the determination of peroxide value (PV) of the frying oil. The basis of the PV determination was the stoichiometric reaction of triphenylphosphine (TPP) with the hydroperoxides present in frying oil to produce triphenylp...
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PMID: 20152417
PDF is available here.
PDF is available here.
Abstract
We investigated the blocking effects of Reg-2 antibodies on the survival of primary cultured spinal cord neurons and astrocytes, as well as on neurite outgrowth. In addition, the effects of Reg-2 in neuron injury models induced by peroxide and mitochondrial poisoning were assessed. Our results showe...
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PMID: 20091885
PDF is available here.
PDF is available here.
Neuropsychology (24)2 2010
Abstract
We postulate that adolescents with moderate to severe TBI recruited alternative neural pathways during perspective-taking because traumatic axonal injury disrupted their fronto-parietal networks mediating social cognition.
Copyright 2010 APA, all rights reserved...
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PMID: 20230107
PDF is available here.
PDF is available here.
Abstract
Hydrogen peroxide (H(2)O(2)) is a powerful oxidising agent. It gives rise to agents known to be effective bleaching agents. The mechanisms of bleaching involve the degradation of the extracellular matrix and oxidation of chromophores located within enamel and dentin. However, H(2)O(2...
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PMID: 19543926
PDF is available here.
PDF is available here.
Abstract
We applied the ORAC method to investigate the capacity of PC and PCB purified from the edible microalga Aphanizomenon flos-aquae to directly quench peroxyl radicals in comparison to well-known antioxidants molecules such as Trolox, ascorbic acid, and reduced glutathione. As a result, PCB was found t...
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PMID: 20136460
PDF is available here.
PDF is available here.
Abstract
We investigated the impact of a congenital prefrontal lesion and its resection on decision making under risk and under ambiguity in a patient with right mediofrontal cortical dysplasia. Both kinds of decision making are normally associated with the medial prefrontal cortex. We additionally studied p...
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PMID: 20391186
PDF is available here.
PDF is available here.
Abstract
Gaseous ozone chemically reacts with unsaturated triglyceride substrates leading to ozonated derivatives with a wide potential applications, ranging from the petrochemical to the pharmaceutical industry. To date, an ultimate understanding of the ozone reactivity during sesame oil ozonation process a...
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PMID: 19900426
PDF is available here.
PDF is available here.
Abstract
After treatment with the whitening agents, there was an 8.1-10.7% decrease in the original microhardness. These values were similar to those obtained from the samples treated with distilled water. In the same resin product, the decrease was similar regardless of the test agents used. In most cases,...
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PMID: 20437722
PDF is available here.
PDF is available here.
Abstract
Lutein administration in newborns increases the levels of BAP decreasing TH. The enhancement of antioxidant activity in plasma clearly results in protecting newborn from perinatal OS. These preliminary results, adding a new contribution in antioxidant strategies, strongly require to be confirmed by...
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PMID: 19590244
PDF is available here.
PDF is available here.
Abstract
We describe the assays for mitochondrial membrane potential and proton leak, which require a TPP(+) electrode and a Clark electrode. The determination of mitochondrial peroxide production with homovanillic acid is also included....
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PMID: 20072912
PDF is available here.
PDF is available here.
Abstract
These results indicate that phloretin and phloridzin have the potential to suppress lipid oxidation in polyunsaturated fatty acid (PUFA) containing foods....
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PMID: 20110888
PDF is available here.
PDF is available here.
Abstract
These results show that carnitine has a direct antioxidant action against physiologically relevant oxidants....
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PMID: 19936630
PDF is available here.
PDF is available here.
Abstract
To evaluate in vitro the effect of fluoride therapies on the surface roughness of human dental enamel exposed to bleaching agents.
Sixty-six specimens obtained from 33 third molars were centrally cut, mounted on acrylic resin supports, polished, and submitted to baseline surface roughness readings (...
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PMID: 19907736
PDF is available here.
PDF is available here.
Marine Drugs (8)3 2010
Abstract
Seven norsesterterpene peroxides: epimuqubilin A (1), muqubilone B (2), unnamed cyclic peroxide ester (3), epimuqubilin B (4), sigmosceptrellin A methyl ester (5), sigmosceptrellin A (6), and sigmosceptrellin B methyl ester (7), isolated from the marine sponge Latrunculia sp., were e...
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PMID: 20411107
PDF is available here.
PDF is available here.
Operative Dentistry (35)4 2010
Abstract
For Group E, the mean value (+/- standard-deviation) was 21.86 (+/- 6.03)a, 18.91 (+/- 8.31)ab, 15.43 (+/- 7.44)b and 10.6 (+/- 4.94)c for ES, E10, E15 and E20, respectively. For Group D, the a values were 34.73 (+/- 4.68)a, 35.12 (+/- 13.43)a, 29.67 (+/- 6.84)ab and 24.56 (+/- 6.54)b for DS, D10, D...
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PMID: 20672732
PDF is available here.
PDF is available here.
Operative Dentistry (35)4 2010
Abstract
At six days, the teeth that were treated with HW and OW presented delta E* = 5.2 and 6.6, respectively, delta BSG = 3, and at 20 days, they presented delta E* = 6.2 and 6.6, respectively, delta BSG = 3. Less than 40% of the subjects experienced tooth sensitivity after OW and HW. No subjects experien...
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PMID: 20672721
PDF is available here.
PDF is available here.
Operative Dentistry (35)4 2010
Abstract
The results of the current study showed that the exclusive assumption of the "chromophore effect" in dental bleaching could not be sustained, because whitening of the dental enamel works at different maturation stages, even in impacted teeth. This effect is irrespective of the bleaching protocol use...
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PMID: 20672724
PDF is available here.
PDF is available here.
Operative Dentistry (35)3 2010
Abstract
The current study investigated the influence of carbamide peroxide on the flexural strength of tooth-colored restorative materials at two environmental temperatures. Seven restorative materials were used, including four resin composites (Filtek Z350, Filtek Z250, Synergy Flow and Filtek P60), a poly...
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PMID: 20533630
PDF is available here.
PDF is available here.
General dentistry (58)4 2010
Abstract
For this study, 120 fragments obtained from human third molars were randomly separated into 12 groups (n = 10). Four groups were used for measuring the Knoop hardness number (KHN) of enamel, while the other eight were used for testing the microtensile bond strength (muTBS) of two adhesive systems (S...
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PMID: 20591767
PDF is available here.
PDF is available here.
Operative Dentistry (35)1 2010
Abstract
This study compared the clinical outcome of bleaching techniques in vital teeth. After IRB approval and informed consent, 90 subjects were selected based on the shade of their anterior teeth (A2 or darker, Vita Classic shade guide). Subjects were assigned to three treatment groups in a split-mouth s...
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PMID: 20166405
PDF is available here.
PDF is available here.
Abstract
This study examined the effect of 10% and 16% carbamide peroxide bleaching agents on the surface microhardness of micro-particulate feldspathic ceramics (VM7 and VM13, Vita Zahnfabrik). Forty specimens (8-mm diameter, 2-mm thickness) were divided into four groups (n=10): GI-VM7 + 10% Whiteness, G2-V...
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PMID: 21053678
PDF is available here.
PDF is available here.
Abstract
The purpose of this study was to evaluate the effects of five home bleaching products containing 15-16% carbamide peroxide on the microhardness of microhybrid composite resin Z-250 (3M/Espe). A total of 72 specimens were fabricated in cylindrical acrylic matrices (4 x 2 mm), filled with composite re...
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PMID: 20645639
PDF is available here.
PDF is available here.
Abstract
The aim of this study was to assess the effect of bleaching agents (10% and 16% carbamide peroxide) on the roughness of two dental ceramics in vitro, and to analyze the surface by scanning electronic microscopy (SEM). Two bleaching agents (10% and 16%/Whiteness, FGM Gel) and two microparticle feldspa...
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PMID: 21638969
PDF is available here.
PDF is available here.
Chemical Record (9)5 2009
Abstract
We have developed a facile synthesis of degradable polyperoxides by the radical alternating copolymerization of 1,3-diene monomers with molecular oxygen at an atmospheric pressure. In this review, the synthesis, the degradation behavior, and the applications of functional polyperoxides are summarize...
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PMID: 19927311
PDF is available here.
PDF is available here.
Abstract
Our results show the most robust staining was found in tissue that was (1) stored at very low temperatures (-20 degrees C and -80 degrees C), (2) pretreated with 0.01% peroxide, and (3) entirely immersed in the staining solutions during immunohistochemistry....
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PMID: 19625950
PDF is available here.
PDF is available here.
Abstract
The Food and Drug Administration now requires labeling of trans fats on nutrition labels, a decision that has created a push to reformulate deep-fat frying oils. Prior to the passage of this law, frying oils contained trans fats because trans fats made the oils more stable and thus allowing for long...
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PMID: 19919512
PDF is available here.
PDF is available here.
Abstract
The aim of this study was to compare the effectiveness of three different types of commonly used bleaching techniques using an in-vitro model. Five groups of 10 tooth specimens were prepared and allocated randomly to treatment groups. The four treatment groups tested were a home tray bleaching produ...
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PMID: 20158058
PDF is available here.
PDF is available here.
Abstract
We used 2,2'-azobis(2-amidinopropane) dihydrochloride (AAPH), a water-soluble generator of peroxyl and alkoxyl radicals, to investigate the susceptibility of CS to oxidative damage. Treatment of isolated mitochondria with AAPH for 8-24 h led to CS inactivation; however, the activity of aconitase, a...
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PMID: 19795928
PDF is available here.
PDF is available here.
Abstract
There were no significant differences with regards to the timespan for the E and D groups (P > 0.05). For the fracture mode analysis, there was a predominance of adhesive failures for Groups C, EI and E14 in enamel, with the same adhesive failures occurred for all groups in dentin. It was concluded...
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PMID: 20178218
PDF is available here.
PDF is available here.
Abstract
After bleaching, the color of enamel slabs and controls differed significantly both over the black and white background in L* and b* values (all P < 0.001). The translucency parameter (TP) of bleached enamel slabs was significantly lower than that of controls (P < 0.01). Both the deltaE values of en...
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PMID: 20178207
PDF is available here.
PDF is available here.