Showing papers on "Campesterol published in 1971"
TL;DR: Etiolated barley seedlings exposed to light had a shift in the ratio of free stigmasterol to beta-sitosterol in favor of stig masterol; however, no correlation was observed between chlorophyll synthesis and shift in sterol composition.
Abstract: The following sterols were identified in barley shoots: stigmasterol, β-sitosterol, campesterol, and cholesterol. The total sterol content of green and etiolated tissue was 2.84 and 3.20 milligrams per gram dry weight, respectively. The free sterols accounted for most of the difference in total sterol content. The sterol ester, sterol glycoside, and acylated sterol glycoside contents of green and etiolated barley shoots were essentially the same. Etiolated tissue had twice as much total β-sitosterol as stigmasterol, while green tissue had equal amounts of these two sterols. The campesterol and cholesterol content was the same in green and etiolated tissue. This same sterol composition pattern held true for the free, glycosidic, and acylated glycosidic sterols; however, the sterol ester fraction had a completely different composition pattern. The esterified stigmasterol content was quite low in green and etiolated tissue, and campesterol was the second largest esterfied sterol component in etiolated tissue. Etiolated barley seedlings exposed to light had a shift in the ratio of free stigmasterol to β-sitosterol in favor of stigmasterol; however, no correlation was observed between chlorophyll synthesis and shift in sterol composition.
54 citations
TL;DR: The first known isolation of 22-cis-cholesta-5, 22-dien-3β-ol from a natural sterol mixture was reported in this article.
35 citations
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TL;DR: The sterols of the bean of the coffee tree ( Coffea arabica L.) have been identified as cycloartenol, 24-methylenecyloartanol, cycloeucalenol, obtusifoliol, citrostadienol, and campestanol as mentioned in this paper.
31 citations
TL;DR: A number of steroids have been tested in an L-cell tissue culture system to determine their effects on cellular sterol biosynthesis and cellular growth and it is found that cholesterol, desmosterol, lathosterol, 7-dehydrocholesterol, and cholestanone reduce de novo synthesis and produce only limited toxicity at high concentrations of exogenous sterol.
29 citations
TL;DR: In this article, the sterols quantified in each fraction were β-sitosterol, campesterol, stigmasterol, cholesterol, 24-ethylidene cholesterol, brassicasterol and 24-methylene cholesterol.
Abstract: Comparative studies of the sterol composition of four sterol fractions, vis., free sterols, sterol esters, sterol glucosides and esterified sterol glucosides, were conducted on the juice sacs of six varieties of oranges and two tangor varieties. The sterols quantified in each fraction were β-sitosterol, campesterol, stigmasterol, cholesterol, 24-ethylidene cholesterol, brassicasterol and 24-methylene cholesterol. Each variety showed its own intrinsic composition for these sterols in the four sterol fractions.
25 citations
TL;DR: A method is presented for the preparation of 2,4-3H-sterols via the technique of exchange-labeling of keto steroids and their subsequent conversion to sterols and some advantages over the conventional catalytic exchange method are discussed.
Abstract: A method is presented for the preparation of 2,4-3H-sterols (stigmasterol, β-sitosterol, campesterol, fucosterol and 7-dehydrocholesterol) via the technique of exchange-labeling of keto steroids and their subsequent conversion to sterols. The preparation of tritium-labeled 3β-hydroxy-24-norchol-5-en-23-oic acid and the synthesis of 2,4-3H-24-azacholesterol are reported. Some advantages of the exchange-labeling method over the conventional catalytic exchange method are discussed.
22 citations
TL;DR: Campesterol was the major plant sterol found in the gastrointestinal tract, liver, and plasma of pigeons fed diets containing large amounts of β-sitosterol and small amounts of campesterol.
22 citations
TL;DR: The utilization and biosynthesis of sterols in Artemia salina were investigated and it was shown by the tracer experiment that Artemia did not incorporate acetate into sterols, indicating thatArtemia may lack sterol-synthesizing ability.
Abstract: In the present study, the utilization and biosynthesis of sterols in Artemia salina were investigated. The results obtained are as follows: 1) In spite of being supplied with the two types of diets containing ergosterol, stig-masterol, β-sitosterol, campesterol, and unknown sterol, Artemia was found to contain only cholesterol as a sterol. The result suggested that Artemia may modify these sterols to chole-sterol. 2) It was shown by the tracer experiment that Artemia did not incorporate acetate into sterols. The result indicated that Artemia may lack sterol-synthesizing ability.
18 citations
TL;DR: St sterol contents of Nicotiana suaveolens, N. langsdorffii and their spontaneous-tumoring hybrid were compared when plants of both species and the hybrid began flowering, and again after numerous tumours had developed spontaneously on the hybrid plants.
13 citations
TL;DR: Cholesterol-4-14C was supplied to intact Nicotiana tabacum L. Maryland Robinson plants through the stem by wick feeding and translocation and metabolism of cholesterol were found to take place.
12 citations
TL;DR: Evidence is presented showing that several common plant sterols interfere with the growth-promoting action of cholesterol in the larvae of Dermestes maculatus when the latter are reared at 35% r.h, which represents an interesting case of utilization of a typical phytosterol by a zoophagous insect.
TL;DR: The sterol contents of the seeds of twelve representative species of grasses were determined by gas chromatography and all contained β-sitosterol, campesterol and stigmasterol, whereas cholesterol, Δ 5 - and Δ 7 -avenasterols were detected in 10, 10 and 2 species respectively.
TL;DR: In this paper, β-Sitosterol and campesterol were identified in the n -hexane-soluble fraction of Douglas-fir bark and the presence of other'steroid-like' compounds was demonstrated.
TL;DR: Palmitone was isolated from the leaves, and phytosterols (β-sitosterol, stigmasterol, campesterol) were detected by gas chromatography from the wood as discussed by the authors.
TL;DR: Paraffins (ranging from C16 to C33) and phytosterols (β-sitosterol, stigmasterol, campesterol) were detected from the leaves and trunks respectively.
TL;DR: Spectra of sterols from haemolymph, reproductive organs, and fat bodies were very similar in composition and showed the preponderance of cholesterol with small quantities of campesterol and β-sitosterol.