نتایج جستجو برای: epicuticular wax ester
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Iron mining activities are a source of particulate iron, which contaminates soil and plants Restinga biome (Brazil). To investigate the possible effects iron toxicity to Ipomoea pes-caprae Canavalia rosea leaves, were submitted different exposure times (12, 36, 108 228 hours) concentrations (0.5 or 150 mg L-1, Fe2+ as FeSO4.7H2O). After hours C. leaves chlorotic while I. presented venal chloros...
The cuticular surface lipids of the red harvester ant, Pogonomyrmex barbatus, were found to contain minor amounts of novel wax esters, in addition to the major components, hydrocarbons. The wax esters ranged in carbon number from C19 to C31 and consisted of esters of both odd- and even-numbered alcohols and acids. Each wax ester with a given carbon number eluted at several different retention t...
This study was conducted to compare lipid components of sebum from persons from three ethnic backgrounds-Caucasian, African American and Northern Asian. Men and women with no acne in two age groups (18‒25 y and 35‒45 y) were recruited. Skin surface hydration (SkiCon 200EX and NovaMeter), barrier function (Delfin VapoMeter), high-resolution clinical imaging, self-assessments and two pairs of seb...
Feedstocks for industrial applications ranging from polymers to lubricants are largely derived from petroleum, a non-renewable resource. Vegetable oils with fatty acid structures and storage forms tailored for specific industrial uses offer renewable and potentially sustainable sources of petrochemical-type functionalities. A wide array of industrial vegetable oils can be generated through biot...
W THEN fixed plant tissues are to be sectioned, they are usually dehydrated V V by passing through graded concentrations of alcohol and are then immersed in chloroform to allow infiltration of the cells by paraffin wax. When performed most meticulously, this process may take as long as 9 days; the least time we have been able to use is about 3 days. Moreover, this procedure, especially the trea...
We describe how pathway engineering can be used to convert a single intermediate derived from lipid biosynthesis, fatty aldehydes, into a variety of biofuel precursors including alkanes, free fatty acids and wax esters. In cyanobacteria, long-chain acyl-ACPs can be reduced to fatty aldehydes, and then decarbonylated to alkanes. We discovered a cyanobacteria class-3 aldehyde-dehydrogenase, AldE,...
[1] Long-chain, odd-carbon-numbered C25 to C35 n-alkanes are characteristic components of epicuticular waxes produced by terrestrial higher plants. They are delivered to aquatic systems via eolian and fluvial transport and are preserved in underlying sediments. The isotopic compositions of these products can serve as records of past vegetation. We have developed a rapid method for stable carbon...
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