Showing papers on "Campesterol published in 1983"
TL;DR: This previously unrecognized absolute specificity for both chirality and bulk at C-24 suggests the involvement of protein binding in at least one of the roles which sterol plays in this single-celled eukaryote.
78 citations
TL;DR: It is concluded that the selective absorption of animal and plant sterols depends upon the presence of a ring system having the bulk of the cholestane nucleus, although not necessarily a rigid or planar one containing a hydroxyl group.
47 citations
Journal Article•
TL;DR: In the Teucrium polium L. were identified, by gaschromatographic and spectroscopic techniques, beta-sitosterol, stigmasterol, campesterol, brassicasterol and clerosterols, which shown a sufficient pharmacological activity compared to that of indomethacine.
Abstract: In the Teucrium polium L. were identified, by gaschromatographic and spectroscopic techniques (1H-NMR and MS), beta-sitosterol, stigmasterol, campesterol, brassicasterol and clerosterol. In the aqueous phase of the alcoholic extract were identified glucose, fructose, raffinose and rhamnose by PC on Watmann paper Number 5. Anti-inflammatory activity was tested using male Wistar rats against carrageenin-induced paw oedema. All tested extract shown a sufficient pharmacological activity compared to that of indomethacine.
47 citations
TL;DR: The demonstration that the free and esterified sterols in D fasciatus consisted of 95–96% sitosterol and 4–5% campesterol, together with the lack of conversion of [14C]sitosterol into cholesterol, establishes that phytosterol dealkylation does not occur in this insect species.
Abstract: The absence of phytosterol dealkylation in the cotton stainer bug, Dysdercus fasciatus, has been established and the major ecdysteroid in the fifth-stage larvae identified. The demonstration that the free and esterified sterols in D fasciatus consisted of 95–96% sitosterol and 4–5% campesterol, a similar composition to the cottonseed diet, together with the lack of conversion of [14C]sitosterol into cholesterol, establishes that phytosterol dealkylation does not occur in this insect species. The ecdysteroid titer determined by radioimmunoassay in the fifth instar of D fasciatus shows a distinct peak at day 6, the instar lasting for 7 days. Makisterone A was purified by HPLC from insects at a time of high ecdysteroid titer and identified as a major component by both fast atom bombardment and electron impact mass spectrometry. Gas-liquid chromatography/mass spectrometry (selected ion monitoring) confirmed the occurrence of makisterone A and revealed the presence of two unidentified compounds. One of these occurs in a similar amount to makisterone A and may be 26-hydroxymakisterone A, whereas only a minute amount of the other compound, which may be 20-deoxymakisterone A, was present; further identification of the latter compounds is necessary. C27 ecdysteroids (eg, ecdysone and 20-hydroxyecdysone) and C29 ecdysteroids (eg, podecdysone A) were undetectable. The specificity of the enzymes of ecdysteroid biosynthesis is discussed.
32 citations
TL;DR: In this paper, three new compounds A, B and C, isolated from the leaves of Solanum torvum have been characterized as 2,3,4,trimethyltriacontane, octacosanyl triacontanoate and 5-hexatriacontanone by spectral data and chemical studies.
28 citations
TL;DR: The 4-desmethylsterol fraction of the liverwort Palavicinnia lyellii is composed of 36% 24β-methylcholest-5-en-3β-ol (dihydrobrassicasterol), 16% 24α-methyl cholest -5,22-dien-3-β -ol (campesterol), 33% 24 α-ethyl choline-1,5,6,3βol (sitosterol), and 15% 24ξ-ethylcholesta-5
18 citations
TL;DR: In this paper, the overall yield was degraded to 24 in good overall yield via 7, 10, 16, 21, 19 and 20 ; similarly, 24 was obtained from 2 and 3.
15 citations
TL;DR: From ether-soluble neutral fraction of the whole plant ofeperomia pellucida (L) HBK (Piperaceae), 4,7-dimethoxy-5-(2-propenyl)-1, 3-benzodioxole or apiol, and three phytosterols, campesterol, stigmasterol and β-sitosterol were isolated and characterized by spectral data.
Abstract: From ether-soluble neutral fraction of the whole plant ofPeperomia pellucida (L) HBK (Piperaceae), 4,7-dimethoxy-5-(2-propenyl)-1, 3-benzodioxole or apiol, in a liquid state, 2,4,5,-trimethoxy styrene, mp 138°, and three phytosterols, campesterol, stigmasterol and β-sitosterol, were isolated and characterized by spectral data.
15 citations
TL;DR: In this article, the unsaponifiable matter obtained from oil ex-tracted from six safflower cultivars (UC-1, Tara, S-541 and S-202) was determined.
Abstract: Composition of the unsaponifiable matter obtained from oil ex-tracted from six safflower cultivars (UC-1, Tara, S-541, S-202, S-317 and S-918) was determined. The composition of the fractions of sterols was related to fatty acid composition, and significant correlations were found between campesterol, Δ7-stigmastenol, oleic and linoleic acids. The composition of the fractions of terpenic alcohols and methyl sterols is also reported.
11 citations
TL;DR: The root oil of Paeonia emodi was analyzed and found to contain a mixture of n-alkanes C14−C33; β-amyrin, butyrospermol, cycloartenol, lupeol, 24-methylenecycloartanol; two unidentified triterpene diols; cholesterol (?), campesterol, and sitosterol as discussed by the authors.
Abstract: The root oil ofPaeonia emodi was analyzed. Unsaponifiable lipid was found to contain a mixture ofn-alkanes C14–C33; β-amyrin, butyrospermol, cycloartenol, lupeol, 24-methylenecycloartanol; two unidentified triterpene diols; cholesterol (?), campesterol, and sitosterol. Saponifiable lipid contains octanoic, decanoic, lauric, myristic, myristoleic, palmitic, palmitoleic, stearic, oleic and linoleic acids.
11 citations
TL;DR: This study suggests that a large number of selected lipids are obtained from the host during assembly of virus particles, and both glycosylation and nonglycosylated derivatives are present.
Abstract: Summary
Sonchus yellow net virus (SYNV) contains approximately 18% lipid composed of 62% phospholipids, 31% sterols and 7% triglycerides. The polar phospholipids consist of phosphatidyl choline, phosphatidyl ethanolamine, phosphatidyl serine, phosphatidyl inositol and phosphatidyl glycerol respectively. The fatty acid composition of the individual phospholipids includes various ratios of palmitic, stearic, oleic, linoleic and linolenic acids. The neutral lipid fraction is composed primarily of free sterols, sterol esters and triglycerides. Sterol glycosides are also present in the polar lipid fraction. Stigmasterol, β-sitosterol, cholesterol and campesterol represent about 50%, 22%, 20% and 8% respectively, by weight, of the total sterol, and both glycosylated and nonglycosylated derivatives are present. Galactolipids are not detectable in the SYNV preparations, although small amounts of other unidentified lipids are present. This study suggests that a large number of selected lipids are obtained from the host during assembly of virus particles.
TL;DR: From the bark of Plumeria obtusifolia was isolated a series of lupeol fatty esters with the carbon numbers 16, 18,20 and 21–28 in the fatty acid part.
TL;DR: From the roots of Randia siamensis, dmannitol, a mixture of β-sitosterol and campesterol, oleanolic acid acetate, oleansolic acid-3-α-l-arabinoside and mesembryanthemoidigenic acid as a sapogenin were isolated and characterized as discussed by the authors.
Abstract: From the roots ofRandia siamensis,d-mannitol, a mixture of β-sitosterol and campesterol, oleanolic acid acetate, oleanolic acid-3-α-l-arabinoside and mesembryanthemoidigenic acid as a sapogenin were isolated and characterized.