共查询到20条相似文献,搜索用时 46 毫秒
1.
D. T. Asilbekova F. M. Tursunkhodzhaeva A. M. Nigmatullaev 《Chemistry of Natural Compounds》2009,45(3):322-324
The composition of lipids from the aerial parts of two species of halophytes from the family Chenopodiaceae, Halostachys caspica C. A. Mey. and Halocharis hispida Bge. was determined. Neutral lipids (NL, 62.1 and 54.2%, respectively) dominated the total lipids (TL) of these plants. More
than a third of the NL were esters of aliphatic alcohols and phytosterols (FAE). Fatty acids 16:0, 18:1, and 18:2 dominated
the acids of FAE; 16:0, 18:1, and 18:3, the phospholipids. The principal fatty acids of glycolipids were unsaturated acids
(68.3 and 75.1%) with linolenic acid dominating (44.9 and 43.5%).
Presented at the 7th International Symposium on the Chemistry of Natural Compounds, Tashkent, October 16–18, 2007.
Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 276–278, May–June, 2009. 相似文献
2.
It was shown that the lipid content of Pinus sylvestris L. was greater than that of Picea obovata L. The difference was 43–45% of total lipids in winter. Polar fractions dominated the lipid composition of both conifers.
The phospholipid content was greater than the glycolipid content in winter. A significant amount of glycolipids that was equal
to that of phospholipids was present simultaneously in meristem of wintering pine buds. Swelling buds of both species showed
in spring an elevated content of glycolipids. 相似文献
3.
Fábio C. Sampaio Paolo Torre Flávia M. Lopes Passos Célia Alencar de Moraes Patrizia Perego Attilio Converti 《Applied biochemistry and biotechnology》2007,136(2):165-181
To obtain in-depth information on the overall metabolic behavior of the new good xylitol producer Debaryomyces hansenii UFV-170, batch bioconversions were carried out using semisynthetic media with compositions simulating those of typical acidic
hemicellulose hydrolysates of sugarcane bagasse. For this purpose, we used media containing glucose (4.3–6.5 g/L), xylose
(60.1–92.1 g/L), or arabinose (5.9–9.2 g/L), or binary or ternary mixtures of them in either the presence or absence of typical
inhibitors of acidic hydrolysates, such as furfural (1.0–5.0 g/L), hydroxymethylfurfural (0.01–0.30 g/L), acetic acid (0.5–3.0
g/L), and vanillin (0.5–3.0 g/L). D. hansenii exhibited a good tolerance to high sugar concentrations as well as to the presence of inhibiting compounds in the fermentation
media. It was able to produce xylitol only from xylose, arabitol from arabinose, and no glucitol from glucose. Arabinose metabolization
was incomplete, while ethanol was mainly produced from glucose and, to a lesser less extent, from xylose and arabinose. The
results suggest potential application of this strain in xyloseto-xylitol bioconversion from complex xylose media from lignocellulosic
materials. 相似文献
4.
T. V. Kharlamova 《Chemistry of Natural Compounds》2007,43(4):391-394
The alkylation of 1,6,8-trihydroxy-3-methylanthraquinone (frangula-emodin) by α-bromoalkylmethylketones was investigated. Hydroxyls in the 1-and 8-positions of the β-derivatives were O-acylated. The compositions and structures of the prepared compounds were confirmed by elemental analysis and UV, IR, PMR,
and 13C NMR spectroscopy.
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Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 324–326, July–August, 2007. 相似文献
5.
A. M. Gapparov S. F. Aripova N. A. Razzakov V. U. Khuzhaev 《Chemistry of Natural Compounds》2008,44(6):743-744
The known alkaloid convolvidine and a new base conpropine, for which the structure N-propylconvolvine was proposed, were isolated from total alkaloids from the aerial part of Convolvulus subhirsutus.
Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 601–602, November–December, 2008. 相似文献
6.
G. I. Kovylyaeva G. A. Bakaleinik I. Yu. Strobykina V. I. Gubskaya R. R. Sharipova V. A. Al’fonsov V. E. Kataev A. G. Tolstikov 《Chemistry of Natural Compounds》2007,43(1):81-85
A new laboratory method for isolating the glycosides stevioside and rebaudiosides A and C from leaves of Stevia rebaudiana was proposed. According to HPLC, the glycoside contents in plants grown in Russia (Voronezh Oblast’) and Ukraine (Crimea)
were 5–6% (stevioside) and 0.3–1.3% (rebaudiosides A and C).
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Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 68–71, January–February, 2007 相似文献
7.
The new alkaloid O-acetylnitraraine was isolated from the aerial part of Nitraria schoberi. Its structure was established using spectral data and chemical transformations.
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Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 472–473, September–October, 2005. 相似文献
8.
A new xanthone (1, 1,7-dihydroxy-2-methoxyxanthone), in addition to the known metabolites 1,7-dihydroxyxanthone (2), 24(R)-stigmast-7,22 (E)-dien-3α-ol (3), and 1,7-dimethoxyxanthone (4), was isolated from the roots of Securidaca inappendiculata. Compounds 1–4 were evaluated by anti-HIV assay and 1–3 showed anti-HIV-1inhibitory activity in vitro.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 348–349, July–August, 2008. 相似文献
9.
The structure of glucofructans from Taraxacum officinale roots growing in Buryatia was studied by chemical, chromatographic, and spectral methods. It was found that fructose,glucose,
saccharose, 1-kestose, and nystose were present in the free state. The structures of the two dominant polymeric compounds,
TGf-1 (5.7 kDa) and TGf-2 (2.6 kDa), which were linear inulin-type macromolecules consisting of fructofuranose units bonded
through β-(2→1)-bonds, were studied.
Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 125–127, March–April, 2009. 相似文献
10.
L. E. Nikitina V. A. Startseva V. V. Plemenkov S. A. Dieva O. A. Lodochnikova I. A. Litvinov 《Chemistry of Natural Compounds》2007,43(3):263-267
A new type of S-containing terpene lactones was produced by the reactions of limonene-1,2-oxide and β-pinene-α-oxide with mercaptoacetic acid.
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Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 220–223, May–June, 2007. 相似文献
11.
E. D. Khairitdinova E. M. Tsyrlina L. V. Spirikhin N. I. Fedorov M. S. Yunusov 《Chemistry of Natural Compounds》2005,41(5):575-577
The known alkaloids deltaline, methyllycaconitine, elasine, and the new norditerpene alkaloid alpinine were isolated from
the aerial part of Delphinium alpinum. The structure of the last was proposed as 1α,6β, 16β-trimethoxy-7-hydroxy-8-ethoxy-14α-propionyloxy-4β-(2″-methyl)succinylanthranoyloxymethyl-N-ethylaconitane
on the basis of PMR, 13C NMR, IR, and mass spectra.
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Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 469–471, September–October, 2005. 相似文献
12.
Li Wang Shuguang Jian Peng Nan Jimei Liu Yang Zhong 《Chemistry of Natural Compounds》2005,41(5):491-493
The chemical constituents of leaf oils of Elephantopus scaber L. from 12 locations in Southern China, including three provinces and Hong Kong, were investigated using GC/MS. A total of
24 compounds were detected, of which 20 were identified by their mass spectra fragmentation patterns. The major compounds
include hexadecanoic acid (8.19–39.22%), octadecadienoic acid (trace - 29.22%), five alkane homologues, i.e., n-tetradecane
(1.19–5.26%), n-pentadecane (3.22–12.05%), n-hexadecane (2.38–16.26%), n-heptadecane (2.48–15.32%), and n-octadecane (1.39–9.59%),
as well as tetramethylhexadecenol (2.06–4.31%). Hierarchical cluster analysis classified the leaf oils into two groups. Two
main chemotypes of leaf oils in E. scaber were thus identified, one rich in hexadecanoic acid and octadecadienoic acid, and the other rich in the five alkane homologues.
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Published in Kimiya Prirodnikh Soedinenii No. 5, pp. 403–404, September–October, 2005. 相似文献
13.
N. I. Kulesh N. A. Vasilevskaya M. V. Veselova V. A. Denisenko S. A. Fedoreev 《Chemistry of Natural Compounds》2008,44(6):712-714
The rare α,4,2′,4′-tetrahydroxydihydrochalcone, flavanones liquiritigenin and naringenin, isoflavones calycosin and 5-methoxydaidzein,
and reduced stilbene dihydroresveratrol were isolated for the first time from Maackia amurensis wood. The structures of the pure compounds were established using 2D NMR COSY, NOE, HMBC, and HSQC experiments.
Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 575–577, November–December, 2008. 相似文献
14.
A new flavonoid, kaempferol-3,4′-di-O-α-L-rhamnopyranoside (1), and three known flavonoids (2–4) were isolated from the aerial parts of T. communis L. The structure of the new compound was elucidated on the basis of spectroscopic data. Compounds 1 and 2 showed significant antioxidant activity (IC50 187.151 ± 0.821 μM, and 92.079±0.513 μM, respectively), whereas compounds 3 and 4 showed moderate activity in DPPH free radical scavenging assays.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 295–297, May–June, 2009. 相似文献
15.
Coprinus xanthothrix was found to have nematicidal activity. Xanthothone was isolated from culture extract guided by activity assay, which was
identified as a novel natural product. Two other compounds were also isolated. These compounds showed nematicidal activity,
with LD50 value of 125–250 ppm both against Panagrellus redivivus and Meloidogyne incognita.
Published in Khimiya Prirodnykh Soedinenii, No. 2, pp. 161–162, March–April, 2008. 相似文献
16.
M. P. Yuldashev B. A. Muminova A. A. Drenin E. Kh. Botirov 《Chemistry of Natural Compounds》2007,43(1):34-36
The new flavone glucoside viscioside, luteolin-4′-O-β-D-galactopyranoside, in addition to the known flavonoids apigenin, luteolin, quercetin, cinaroside, luteolin-4′-O-β-D-glucoside, and isoquercitrin were isolated from the aerial part of Vicia subvillosa.
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Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 30–31, January–February, 2007. 相似文献
17.
Formononetin and the new isoflavonoid glycosides formononetin-7-O-β-D-galactopyranoside and inermin-3-O-β-D-galactopyranoside were isolated from Trifolium pratense L. roots. The structures of the isolated compounds were proved using chemical transformations and UV, PMR, and 13C NMR spectra.
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Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 21–23, January–February, 2008. 相似文献
18.
The chemical composition of the essential oils of Achillea clavennae L., Achillea holosericea Sibth. & Sm., Achillea lingulata W. & K., and Achillea millefolium L. from the Balkans was determined by GC and GC/MS analyses. The main components were 1,8-cineole in A. holosericea, camphor in A. clavennae, β-pinene in A. millefolium, and τ-cadinol in A. lingulata. A detailed chemotaxonomic discussion is presented.
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Published in Khimiya Prirodnykh Soedinenii, No. 6, pp. 555–558, November–December, 2005. 相似文献
19.
A new iridoid glucoside and seven known compounds were isolated from the herb of Lamiophlomis rotata (Benth.) Kudo, which is a Tibetan folk medicine. The structure of the new iridoid glucoside was elucidated by spectroscopic
methods. The others were lamiophlomiol A, shanzhigenin methyl ester, loganin, 8-O-acetyl-shanzhiside methyl ester, schismoside, phlomiol, and 7,8-dehydropenstemoside.
Published in Khimiya Prirodnykh Soedinenii, No. 3, pp. 306–307, May–June, 2009. 相似文献
20.
The composition of water-soluble polysaccharides from the aerial part of Lophanthus chinensis Benth. (Lamiaceae) was studied. The dominant polymer LCWH-2, which was a partially acetylated glucoarabinogalactan, the main chain of which was constructed of α-(1→6)-bonded galactopyranose, was isolated and characterized. Atoms C-2 and C-3 of the main chain had branches of single
glucopyranose and arabinopyranose units and short chains of (1→3)-bonded arabinose.
Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 258–260, May–June, 2009. 相似文献