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Degenerate electron exchange reaction of n-alkane radical cations in solution.

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The degenerate electron exchange (DEE) reaction involving radical cations (RCs) of n-nonane, n-dodecane, and n-hexadecane in n-hexane solution was studied over the temperature range 253-313 K using the method of time-resolved magnetic field effect in recombination fluorescence of spin-correlated

Two distinct monooxygenases for alkane oxidation in Nocardioides sp. strain CF8.

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Alkane monooxygenases in Nocardioides sp. strain CF8 were examined at the physiological and genetic levels. Strain CF8 can utilize alkanes ranging in chain length from C(2) to C(16). Butane degradation by butane-grown cells was strongly inhibited by allylthiourea, a copper-selective chelator, while

Alkane hydroxylase homologues in Gram-positive strains.

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We isolated Gram-positive alkane-degraders from soil and a tricking-bed reactor, and show using polymerase chain reaction (PCR) with degenerate alkane hydroxylase primers and Southern blots that most Rhodococcus isolates contain three to five quite divergent homologues of the Pseudomonas putida GPo1

Virial coefficients of model alkanes.

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We report the results from Mayer-sampling Monte Carlo calculations of the virial coefficients of the united-atom TraPPE-UA model of normal alkanes. For alkane chain lengths from n=2 to 20 (where n is the number of carbon atoms), results are given for the virial coefficients B(2), B(3), and B(4);

Toxicity of n-C9 to n-C13 alkanes in the rat on short term inhalation.

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Male Sprague Dawley rats were exposed to inhalation of n-C9 to n-C13 alkanes close to air saturation at 20 degrees (4438, 1369, 442, 142 and 41 p.p.m., respectively) for 8 hours and observed for the following 14 days. In addition, exposure to higher and lower concentrations of n-C9 was performed.

Anaerobic alkane-degrading strain AK-01 contains two alkylsuccinate synthase genes.

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The sulfate-reducing strain AK-01 activates alkanes via addition of the subterminal carbon to the double bond of fumarate. This reaction is similar to the action of the glycyl radical enzyme benzylsuccinate synthase (Bss). It was hypothesized that strain AK-01 possesses a similar enzyme. Degenerate

Multiple p450alk (cytochrome P450 alkane hydroxylase) genes from the halotolerant yeast Debaryomyces hansenii.

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The halotolerant alkane-assimilating yeast Debaryomyces hansenii was examined for P450 alkane hydroxylase genes known to be required for alkane assimilation in Candida. Four distinct P450alk gene segments and an allelic segment were isolated using PCR based on degenerate primers derived from the

Clinical findings on the use of long-term heavy tamponades (semifluorinated alkanes and their oligomers) in complicated retinal detachment surgery.

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BACKGROUND Heavy tamponades for pathologies in the lower part of the retina are a new development, and different tamponades have recently come into clinical use: semifluorinated alkanes (F(6)H(6), F(6)H(8)) and their oligomers (OL62HV). METHODS Nine patients had been operated on using F(6)H(8) (n=5)

The cytochrome P450ALK multigene family of an n-alkane-assimilating yeast, Yarrowia lipolytica: cloning and characterization of genes coding for new CYP52 family members.

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Genes encoding cytochromes P450 of the CYP52 family in the n-alkane-assimilating yeast Yarrowia lipolytica have been cloned and analyzed. Degenerate PCR primers which were designed for the conserved amino acid sequences of cytochromes P450ALK of Candida species were used for amplification and

Molecular screening for alkane hydroxylase genes in Gram-negative and Gram-positive strains.

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We have developed highly degenerate oligonucleotides for polymerase chain reaction (PCR) amplification of genes related to the Pseudomonas oleovorans GPo1 and Acinetobacter sp. ADP1 alkane hydroxylases, based on a number of highly conserved sequence motifs. In all Gram-negative and in two out of

Gene diversity of CYP153A and AlkB alkane hydroxylases in oil-degrading bacteria isolated from the Atlantic Ocean.

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Alkane hydroxylases, including the integral-membrane non-haem iron monooxygenase (AlkB) and cytochrome P450 CYP153 family, are key enzymes in bacterial alkane oxidation. Although both genes have been detected in a number of bacteria and environments, knowledge about the diversity of these genes in

Diversity of flavin-binding monooxygenase genes (almA) in marine bacteria capable of degradation long-chain alkanes.

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Many bacteria have been reported as degraders of long-chain (LC) n-alkanes, but the mechanism is poorly understood. Flavin-binding monooxygenase (AlmA) was recently found to be involved in LC-alkane degradation in bacteria of the Acinetobacter and Alcanivorax genera. However, the diversity of this

Evaluation of mapping schemes for systematic coarse graining of higher alkanes.

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A model is introduced to explore the influence of different coarse-grained (CG) resolutions on the structural and thermodynamic properties of higher alkanes. Four different mapping schemes are considered, for which the potentials are derived using the conditional reversible work (CRW) method. The

Tapetum degeneration retardation is critical for aliphatic metabolism and gene regulation during rice pollen development.

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As a complex wall system in flowering plants, the pollen outer wall mainly contains aliphatic sporopollenin; however, the mechanism for synthesizing these lipidic precursors during pollen development remains less well understood. Here, we report on the function of the rice tapetum-expressing TDR

Mechanisms of Pulmonary Toxicity of Perfluoro-n-Alkane Pyrolysis Products with Consideration of the Structural Features of the Blood-Air Barriers.

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Perfluoroisobutylene a is pulmonotoxic chemical generated during pyrolysis of perfluoro-nalkanes (polytetrafluoroethylene). The mechanisms of acute pulmonary toxicity induced by perfluoroisobutylene have not been studied yet. The analysis of tissues of brown frogs showed that the products of

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