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Debrominated, hydroxylated and methoxylated metabolism in maize (Zea mays L.) exposed to lesser polybrominated diphenyl ethers (PBDEs).

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A hydroponic experiment was conducted to investigate the debrominated, hydroxylated and methoxylated metabolism of polybrominated diphenyl ethers (PBDEs, BDE-15, -28 and -47) in maize. A total of six debrominated metabolites (de-PBDEs), seven hydroxylated PBDEs (OH-PBDEs, including two unidentified

Sterols of male and female compound inflorescences of Zea mays L.

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A comparison has been made between the sterols of male and female inflorescences and of pollen from Zea mays. The female inflorescence was shown to contain cholesterol, 24-methylcholesterol, 24-ethyl-5,22-cholestadien-3β-ol, 24-ethylcholesterol and (28Z)-24-ethylidenecholesterol. Themale

Polyamine-stimulated phosphorylation of proteins from corn (Zea mays L.) coleoptiles.

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The effect of polyamines (spermine, spermidine and putrescine) on in vitro phosphorylation of proteins from corn coleoptiles was investigated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis and autoradiography. Spermine promoted the phosphorylation of several membrane and soluble

The involvement of glucose-6-phosphatase in mucilage secretion by root cap cells of Zea mays.

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In order to determine the involvement of glucose-6-phosphatase in mucilage secretion by root cap cells, we have cytochemically localized the enzyme in columella and peripheral cells of root caps of Zea mays. Glucose-6-phosphatase is associated with the plasmalemma and cell wall of columella cells.

Structure of amyloplasts and endoplasmic reticulum in the root caps of Lepidium sativum and Zea mays observed after selective membrane staining and by high-voltage electron microscopy.

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The structure of plastids in the root cap of cress and maize was studied by low- and high-voltage electron microscopy after staining their membranes with a mixture of zinc iodide and osmium tetroxide. In plastids of both species electron-opaque membranes were found in the plastid interior while

Corn oil-induced decrease in arterial thrombosis tendency may be related to altered plasma vitamin K transport.

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In this article we report the effects of low and high fat diets on the arterial thrombosis tendency in rats. The animal system used was the aorta loop model, in which we compared the effect of saturated (hardened coconut oil, HCO) and unsaturated (sunflower seed oil, SSO; corn oil, CO) fatty acids

Correlations between photosynthetic enzymes, CO2-fixation and plastid structure in an albino mutant of Zea mays L.

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An albino seedling of Zea mays L. was investigated for its potential for CO2-assimilation. In the mesophyll the number, dimensions and fine structure of chloroplasts are drastically reduced but to a lesser extent in the bundle sheath. Chlorophyll concentration is zero and carotenoid concentration

A Comparison of Nitrite Reductase Enzymes from Green Leaves, Scutella, and Roots of Corn (Zea mays L.).

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Nitrite reductase from green leaves of corn (Zea mays L.) is eluted from a diethylaminoethyl-cellulose column in one peak of activity by a chloride gradient, while nitrite reductase from scutellum tissue is resolved into two peaks of activity, apparently representing two forms of the enzyme NiR1 and

Ribonuclease Activity Associated With Ribosomes of Zea mays.

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At pH 6.5, a ribonuclease(s) is associated with ribosomes isolated from corn (Zea mays L.) and cannot be removed by repeated differential centrifugation or by sedimenting through the sucrose gradient. The enzyme is active under conditions favoring the maintenance of integrity of the ribosomes.

A comparative analysis of fatty acid composition of root and shoot lipids in Zea mays under copper and cadmium stress.

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A comparative analysis of fatty acid composition was conducted in maize (Zea mays L.) under copper and cadmium stress. The unsaturation level (double-bond index) of phosphatidylethanolamine (PE) and digalactosyldiacylglycerol (DGDG) was increased in response to both metal treatments, whereas the

The Effect of ATP on the Photoconversion of Protochlorophyllide in Isolated Etioplasts of Zea mays.

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The transformation of protochlorophyllide (PChle) into chlorophyllide (Chle) has been studied in isolated etioplasts from Zea mays. ATP (1.5mm) prevented the transformation of photoconvertible PChle 650 to PChle 630 in aged etioplasts. Curve analysis indicated that the ATP effect on

Benoxacor induction of terbuthylazine detoxification in Zea mays and Festuca arundinacea.

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The action of safener benoxacor on the detoxification of terbuthylazine (TBA) in Zea mays and Festuca arundinacea was ascertained by the investigation of the effects of benoxacor on the activity of glutathione-S-transferases (GSTs) in the shoots of the two plant species. TBA treatment generally

Dietary extra-virgin olive oil and corn oil differentially modulate the mRNA expression of xenobiotic-metabolizing enzymes in the liver and in the mammary gland in a rat chemically induced breast cancer model.

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High extra-virgin olive oil (EVOO) and corn oil diets differentially modulate experimental mammary carcinogenesis. We have investigated their influence on the initiation stage through the modulation of the expression of xenobiotic-metabolizing enzymes (XMEs) in the liver and the mammary gland.

Differing hepatotoxicity and lethality after subacute trichloroethylene exposure in aqueous or corn oil gavage vehicles in B6C3F1 mice.

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Subacute toxicity of trichloroethylene (TCE) was evaluated in male and female B6C3F1 mice using corn oil or aqueous gavage vehicles. Mice received oral doses of TCE five times a week for 4 weeks at 600, 1200 and 2400 mg/kg/day for males and 450, 900 and 1800 mg/kg/day for females. Vehicle control

Changes in PEP carboxylase, rubisco and rubisco activase mRNA levels from maize (Zea mays) exposed to a chronic ozone stress.

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We quantified the ozone impact on levels of Zea mays L. cv. Chambord mRNAs encoding C4-phosphoenolpyruvate carboxylase (C4-PEPc), ribulose-l,5-bisphosphate carboxylase/oxygenase small and large subunits (Rubisco-SSU and Rubisco-LSU, respectively) and Rubisco activase (RCA) using real-time RT-PCR.

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