• 1.4 This test method detects hydroperoxides such as t-butyl hydroperoxide and cumene hydroperoxide. (techstreet.com)
  • Model lipid hydroperoxides, cumene hydroperoxide, and t-butyl hydroperoxide enhanced the yield of these radicals and also generated an alkoxyl (·OR) radical. (cdc.gov)
  • Although histidine did not cause radical formation in the reaction between Ni(II) and cumene hydroperoxide under aerobic conditions, the addition of histidine to a mixture containing Ni(II), cysteine, and cumene hydroperoxide under the same experimental conditions increased the yield of ·R radical but lowered the yield of ·OR and ·OH radical adducts. (cdc.gov)
  • Generation of free radicals in reactions of Ni(II)-thiol complexes with molecular oxygen and model lipid hydroperoxides. (cdc.gov)
  • The generation of free radicals from reactions of nickel (II)-thiol complexes with molecular oxygen and model lipid hydroperoxides was investigated by electron spin resonance (ESR) utilizing 5,5-dimethyl-1-pyrroline-N-oxide (DMPO) as a spin trap. (cdc.gov)
  • The results indicate that free radical generation from the reaction of Ni(II)-thiol complexes and molecular oxygen, and/or lipid hydroperoxides, may play an important role in the mechanism(s) of Ni(II) toxicity and carcinogenesis. (cdc.gov)
  • It follows that aerobic organisms have equipped themselves with specific H 2 O 2 dismutases and H 2 O 2 reductases, of which catalase and the alkyl hydroperoxide reductase (AhpR) are the best-studied prokaryotic members. (biomedcentral.com)
  • Seaver, LC & Imlay, JA 2001, ' Alkyl hydroperoxide reductase is the primary scavenger of endogenous hydrogen peroxide in Escherichia coli ', Journal of bacteriology , vol. 183, no. 24, pp. 7173-7181. (illinois.edu)
  • Incubation of nickel (II) [Ni(II)] with cysteine in an aerobic environment generated hydroxyl (·OH) radical, which then reacted with cysteine to generate a carbon-centered alkyl (·R) radical. (cdc.gov)
  • Analysis of candidate genes revealed that the residual activity is due to alkyl hydroperoxide reductase (Ahp). (illinois.edu)
  • Locations of genes encoding alkyl hydroperoxide reductase on the physical map of the Escherichia coli K-12 genome. (ecmdb.ca)
  • Trujillo, M. 'PrxQ B from Mycobacterium tuberculosis is a monomeric, thioredoxin-dependent and highly efficient fatty acid hydroperoxide reductase' (2016) Free Radical Biology and Medicine. (uba.ar)
  • There are a number of reactive nitrogen oxide species, such as N2O3 and ONOO-, that can alter critical cellular components under high local concentrations of NO. However, NO can also abate the oxidation chemistry mediated by reactive oxygen species such as H2O2 and O2- that occurs at physiological levels of NO. In addition to the antioxidant chemistry, NO protects against cell death mediated by H2O2, alkylhydroperoxides, and xanthine oxidase. (researchgate.net)
  • 1.2 The range of hydroperoxide number included in the precision statement is 0 mg/kg to 50 mg/kg active oxygen as hydroperoxide. (techstreet.com)
  • Nitroarenes react with anions of tert -butyl and cumyl hydroperoxides in the presence of strong bases to form substituted o - and p -nitrophenols. (organic-chemistry.org)
  • BASIS OF NOMINATION TO THE CSWG tert -Butyl hydroperoxide ( t- BuOOH) is brought to the attention of the CSWG as a relatively stable alkyl hydroperoxide that has high production volume due to its use as a polymerization initiator. (nih.gov)
  • 2. Quercetin protects human hepatoma HepG2 against oxidative stress induced by tert-butyl hydroperoxide. (nih.gov)
  • 10. Response of the antioxidant defense system to tert-butyl hydroperoxide and hydrogen peroxide in a human hepatoma cell line (HepG2). (nih.gov)
  • 12. Protective effects of oligomeric and polymeric procyanidin fractions from defatted grape seeds on tert-butyl hydroperoxide-induced oxidative damage in HepG2 cells. (nih.gov)
  • 18. A tocotrienol-rich fraction from grape seeds inhibits oxidative stress induced by tert-butyl hydroperoxide in HepG2 cells. (nih.gov)
  • and R3 and R4 each independently represent a hydrogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an aryl group, or an aralkyl group. (justia.com)
  • If the R' is hydrogen, the compound is called an organic hydroperoxide . (wikidoc.org)
  • PRDX1 is part of the peroxiredoxin family of antioxidant enzymes, which reduce hydrogen peroxide and alkyl hydroperoxides. (prospecbio.com)
  • The luxS mutant is also more sensitive to hydrogen peroxide and cumene hydroperoxide than wild-type. (usda.gov)
  • Interestingly, the expression of ahpC (encoding alkyl hydroperoxide reductase) is increased in the presence of luxS gene under hydrogen peroxide-treated condition, which is consistent with our finding that luxS mutant exhibits higher sensitivity to oxidative stress than that of the wild-type. (usda.gov)
  • From NCBI Gene: This gene encodes a member of the peroxiredoxin family of antioxidant enzymes, which reduce hydrogen peroxide and alkyl hydroperoxides. (nih.gov)
  • Cumene hydroperoxide is an intermediate in the cumene process of industrial synthesis of phenol . (wikidoc.org)
  • Antioxidant balance and free radical generation in vitamin E deficient mice after dermal exposure to cumene hydroperoxide. (cdc.gov)
  • In vitro experiments have demonstrated metal-catalyzed formation of alkoxyl, alkyl and aryl radicals in keratinocytes incubated with cumene hydroperoxide. (cdc.gov)
  • It was found that 30 min after topical exposure, cumene hydroperoxide (12mmole/kg) induced free radical generation in the skin of female Balb/C mice (13-14 weeks old) kept for 10 weeks on vitamin E deficient diets. (cdc.gov)
  • In contrast, no radical adducts were detected when cumene hydroperoxide was applied to the skin of mice fed a vitamin E sufficient diet. (cdc.gov)
  • PBN adducts detected by ESR in vitamin E deficient mice provide direct evidence for in vivo tree radical generation in the skin after exposure to cumene hydroperoxide. (cdc.gov)
  • GSTs are predominantly expressed in the cytosol, where their GSH-dependent catalytic functions include the conjugation and resulting detoxification of herbicides, the reduction of organic hydroperoxides formed during oxidative stress and the isomerization of maleylacetoacetate to fumarylacetoacetate, a key step in the catabolism of tyrosine. (biomedcentral.com)
  • 7. Alkyl hydroxytyrosyl ethers show protective effects against oxidative stress in HepG2 cells. (nih.gov)
  • A catalytic enantio- and diastereoselective addition of alkyl 1,1-diboron reagents to aryl and vinyl aldehydes provides 1,2-hydroxyboronates promoted by a readily available chiral monodentate phosphoramidite-copper complex. (organic-chemistry.org)
  • The newly formed peroxides degrade through a free radical process to form hydroperoxides . (wearcheck.com)
  • Anti-oxidants are typically aromatic amines, hindered phenols, or alkyl sulfides which act as free radical scavengers in that they are capable of deactivating a free radical molecule like peroxide. (wearcheck.com)
  • syn -MVK-oxide undergoes intramolecular 1,4 H-atom transfer to form a substituted vinyl hydroperoxide intermediate, 2-hydroperoxybuta-1,3-diene (HPBD), which subsequently decomposes to hydroxyl and vinoxylic radical products. (nsf.gov)
  • Considering the previous example, the decomposition of the 8-OOH oleate, the scission in position A may produce an alkyl radical on the methyl end of the molecule. (gerli.com)
  • In addition, many liquid ethers in the presence of air , light, and metal slowly (over a period of months) form ether hydroperoxides and peroxides (e.g. diethyl ether peroxide ) which are extremely unstable. (wikidoc.org)
  • Anti-oxidants present in the oil hinder the formation of these high molecular molecules by either inhibiting the formation of the initial peroxides, or by reducing the ability of peroxides to form hydroperoxides. (wearcheck.com)
  • Strongly oxidizing acids, peroxides, and hydroperoxides are incompatible with carbamates. (leaderbio-ingredients.com)
  • Both biphenyl and ortho+para-chlorinated PCBs are inducers of the O 2 -dependent bph -pathway, and several chaperone proteins and an alkyl hydroperoxide reductase may contribute to detoxification of oxygenated byproducts of this process. (nih.gov)
  • The formation of hydroperoxides is highly unfavourable as these chemical species will, through a condensation polymerization process, form high molecular molecules. (wearcheck.com)
  • The formation of HPMAF is observed by the rapid appearance of a fragment ion at m/z 99, consistent with the proposed mechanism and characteristic loss of HO2 upon photoionization of functional hydroperoxides. (nsf.gov)
  • Similarly, the 9-hydroperoxide of oleic acid leads to the formation of 1-nonene , the 10-OOH to the formation of octane and the 11-OOH to that of heptane . (gerli.com)
  • Combined actions of three enzymes: lipase, lipoxygenase (LOX) and hydroperoxide lyase (HPL) convert lipidic substrates such as C 18:2 and C 18:3 fatty acids into short chain volatiles. (ac.be)
  • C13 hydroperoxides formed from linoleic acid (18:2n-6) or arachidonic acid (20:4 n-6) produce pentane gas by b -scission between C13 and C14, the OOH group being on the sixth carbon from the methyl end of the fatty acids (13th from the carboxyl group). (gerli.com)
  • The general structure of an organic hydroperoxide. (wikidoc.org)
  • Au sein de celle-ci, les actions combinées de trois enzymes, lipase, lipoxygénase (LOX) et hydroperoxyde lyase (HPL), convertissent un substrat lipidique (acides C 18:2 et C 18:3 ) en molécules volatiles à courte chaine. (ac.be)
  • This study identifies the functionalized hydroperoxide species, 1-hydroperoxy-2-methylallyl formate (HPMAF), generated from the reaction of MACR-oxide with formic acid using multiplexed photoionization mass spectrometry (MPIMS, 298 K = 25 °C, 10 torr = 13.3 hPa). (nsf.gov)
  • Pinane hydroperoxide is used in production of styrene-butadiene synthetic rubber . (wikidoc.org)
  • Par conséquent, des systèmes de production compétitifs ont été développés afin de subvenir à la haute demande en molécules aromatiques naturelles. (ac.be)
  • In addition, bimolecular reaction of MVK-oxide with D 2 -formic acid forms a functionalized hydroperoxide adduct, which is the dominant product channel, and is compared to a previous bimolecular reaction study with normal formic acid. (nsf.gov)