Cyclohexanol
Mostrando 13-24 de 36 artigos, teses e dissertações.
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13. Oxidação de hidrocarbonetos com peroxido de hidrogenio catalisada por renio em fase homogenea e heterogenea
Nowadays, there has been an increasing number of studies on the oxidation of organic compounds such as olefins, phenols, anisols, alcohols and alkanes catalyzed by rhenium complexes. In the first part of this work, the oxidation of hydrocarbons with anhydrous hydrogen peroxide, catalyzed by CH3ReO3, using acetonitrile as a solvent at 80°C was studied. In th
Publicado em: 1999
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14. Oxidação de cicloexano por terc-butil hidroperoxido catalisada por complexos de ferro (III) e cobre (II) soluveis em cicloexano
Cyclohexane oxidation by tert-butyI hydroperoxide in the presence of Fe(tma)3, Fe(fod)3, Cu(tma)2 and [Cu(en)2](NO3)2 was studied under reflux and under an oxygen pressure of 25 bar at 70°C. The iron catalysts produced cyclohexanone and cyclohexanol as main products, while the copper catalysts form cyclohexene as well. Over-oxidation produts were formed in
Publicado em: 1997
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15. Oxidação catalitica de cicloexano com peroxido de hidrogenio em condições ambientais
The oxidation of cyclohexane by the GoAgg system (FeCl3.6H2O, H2O2, pyridine, acetic acid) was studied at ambient conditions. The principal product obtained is cyclohexanone together with some cyclohexanol. The turnover number, the selectivity (ONE/OL) and the efficiency with respect to hydrogen peroxide were studied as a function of the temperature, the qua
Publicado em: 1992
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16. Oxidação de cicloexano pelo sistema GIF : sobre-oxidação e influencia dos ligantes
In earlier research, it had not been possible to close the mass balance for cyclohexane oxidation by the Gif system. lnitially we quantified the losses of cyclohexane by evaporation and were able to improve the mass balances to 97,2% at 20°C and to 99,6% a 80°C. ln order to explain the remaining differences we looked for possible overoxidation and/or coupl
Publicado em: 1991
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17. Oxidação biomimetica de cicloexano por peroxido de hidrogenio catalisada por sais de cobre (II)
Cyclohexane was oxidized by the GoChAgg system (pyridine, copper (II) salt, H2O2 under ambient conditions. The only reaction product was cyclohexanone. Efficiency and turnover number were studied as a function of the following reaction parameters; temperature; amount of catalyst, substrate and oxidant; presence of acetic acid; effect of counter-ion associate
Publicado em: 1991
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18. Genetic Analysis of a Gene Cluster for Cyclohexanol Oxidation in Acinetobacter sp. Strain SE19 by In Vitro Transposition
Biological oxidation of cyclic alcohols normally results in formation of the corresponding dicarboxylic acids, which are further metabolized and enter the central carbon metabolism in the cell. We isolated an Acinetobacter sp. from an industrial wastewater bioreactor that utilized cyclohexanol as a sole carbon source. A cosmid library was constructed from Ac
American Society for Microbiology.
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19. Comparative Study of the Ability of Three Xanthobacter Species To Metabolize Cycloalkanes
The ability of three species of Xanthobacter to metabolize cyclohexane and its derivatives has been compared. Xanthobacter flavus was unable to utilize any of the cycloalkanes under investigation. X. autotrophicus was unable to utilize cyclohexane but was able to grow with a limited range of substituted cycloalkanes, including cyclohexanol and cyclohexanone.
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20. Demonstration of a receptor in Torpedo synaptic vesicles for the acetylcholine storage blocker L-trans-2-(4-phenyl[3,4-3H]-piperidino) cyclohexanol.
Transport and storage of acetylcholine by purified Torpedo electric organ synaptic vesicles is blocked by the drug L-trans-2-(4-phenylpiperidino)cyclohexanol (AH-5183). This study sought evidence of a specific receptor for the drug. Highly tritiated L-trans-2-(4-phenyl [3,4-3H] piperidino)-cyclohexanol (L-[3H] AH5183) was synthesized. An excess of nonradioac
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21. Investigation on neurotoxicity of occupational exposure to cyclohexane: a neurophysiological study.
OBJECTIVES: To examine the effect of occupational exposure to cyclohexane on the peripheral nervous system. METHODS: A nerve conduction study was performed on 18 workers exposed to cyclohexane in a luggage factory and on age and sex matched occupationally unexposed controls. 12 workers had been exposed to n-hexane (median 2.8 years) before the start of expos
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22. Identification of a Transcriptional Activator (ChnR) and a 6-Oxohexanoate Dehydrogenase (ChnE) in the Cyclohexanol Catabolic Pathway in Acinetobacter sp. Strain NCIMB 9871 and Localization of the Genes That Encode Them†
We identified chnR, a gene encoding an AraC-XylS type of transcriptional activator that regulates the expression of chnB, the structural gene for cyclohexanone monooxygenase (CHMO) in Acinetobacter sp. strain NCIMB 9871. The gene sequence of chnE, which encodes an NADP+-linked 6-oxohexanoate dehydrogenase, the enzyme catalyzing the fifth step of cyclohexanol
American Society for Microbiology.
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23. Isolation and Characterization of a Cyclohexane-Metabolizing Xanthobacter sp
An unusual Xanthobacter sp., capable of independent growth on cyclohexane as the sole source of carbon and energy, has been isolated from soil by using classical enrichment techniques. The mean generation time for growth on cyclohexane was 6 h. The microorganism showed a limited ability to utilize hydrocarbons, with only alicyclic hydrocarbons closely relate
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24. Quantitative autoradiography of brain binding sites for the vesicular acetylcholine transport blocker 2-(4-phenylpiperidino)cyclohexanol (AH5183).
2-(4-Phenylpiperidino)cyclohexanol (AH5183) is a noncompetitive and potent inhibitor of high-affinity acetylcholine transport into cholinergic vesicles. It is reported here that [3H]AH5183 binds specifically and saturably to slide-mounted sections of the rat forebrain (Kd = 1.1 to 2.2 X 10(-8) M; Bmax = 286 to 399 fmol/mg of protein). The association and dis