thiouracil/hypoxia

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Photosensitized damage to supercoiled plasmid DNA induced by 334-nm radiation in the presence of 2-thiouracil consists of alkali- and piperidine-labile sites as well as frank strand breaks.

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A covalently closed, supercoiled plasmid was irradiated with 334-nm ultraviolet radiation in the presence of the naturally occurring photosensitizer 2-thiouracil (s2Ura). After irradiation, some DNA samples were treated to reveal labile sites. Agarose gel electrophoresis was then used to resolve the

Reductive metabolism of the nitroimidazole-based hypoxia-selective cytotoxin NLCQ-1 (NSC 709257).

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The enzymatic cell-free metabolism of the novel hypoxia-selective cytotoxin 4-[3-(2-nitro-1-imidazolyl)-propylamino]-7-chloroquinoline hydrochloride (NLCQ-1) was investigated under hypoxic or aerobic conditions in the presence of purified reductive enzymes or isolated rat liver microsomes by

Periportal and pericentral pyridine nucleotide fluorescence from the surface of the perfused liver: evaluation of the hypothesis that chronic treatment with ethanol produces pericentral hypoxia.

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Pyridine nucleotide fluorescence made from the surface of the hemoglobin-free perfused rat liver was measured continuously by using a "micro-light guide" placed on selected periportal and pericentral regions of the liver lobule. From the portal oxygen tension at which pyridine nucleotide reduction

Sudden infant death syndrome and placental disorders: the thyroid-selenium link.

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Placental insufficiency, inducing hypoxia-ischaemia, is considered a major cause of neuronal injury and impaired post natal development. Placental insufficiency alters the metabolism of arachidonic acid and its oxidation products. Premature labour and low-birth-weight infants are associated with

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