共查询到20条相似文献,搜索用时 15 毫秒
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N. A. Tyukavkina K. I. Lapteva V. A. Larina N. G. Devyatko 《Chemistry of Natural Compounds》1968,3(5):252-254
Summary The quantitative determination of quercetin and dihydroquercetin in the total flavonoids ofLatrix dahurica has been effected by the use of thin-layer chromatography on Kapron for separating the mixture with subsequent elution of the spots and colorimetry of the eluates obtained. The methanol-dimethylformamide (1:1) system was used as the eluate. It has been found that the flavonoids of the heartwood ofLatrix dahurica contain a predominating amount, 69% of dihydroquercetin, the amount of quercetin being 11%.Khimiya Prirodnykh Soedinenii, Vol. 3, No. 5, pp. 298–301, 1967 相似文献
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A. Dakshinamoorthy R. K. Singh R. H. Iyer 《Journal of Radioanalytical and Nuclear Chemistry》1994,177(2):327-333
A simple and rapid method for spectrophotometric determination of palladium from highly acidic and highly radioactive nuclear waste using -benzoin oxime (ABO) as extractant and isobutyl methyl ketone (hexone) as diluent has been developed. The method can be employed over a wide range of nitric acid concentrations and for palladium concentrations in the range of 1·10–5M to 4·10–4M in the organic phase. The molar absorptivity was found to be 4·103l·mol–1·cm–1. Influence of various heavy metal ions, fission products and corrosion products was studied. The method was found to give a precision and accuracy better than 4% at 100 g of palladium. 相似文献
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G. F. Chernenko K. I. Demenkova E. E. Ivanova É. N. Shmidt 《Chemistry of Natural Compounds》1991,26(5):548-551
A study of the chemical composition of a petroleum ether extract of the bark of Yeddo spruce growing in Khabarovsk Territory has shown that the neutral fraction of the extract contained waxes, glycerides, diterpenoids — epimanool, cis- and trans-abienols, and phyllocladenol, and triterpenoids — the epimeric 3-and 3-methoxy-21-hydroxy-14-serratenes and a ketone which has been ascribed the structure of 21-keto-3-methoxy-14-serratene.Institute of Organic Chemistry, Siberian Branch, Academy of Sciences of the USSR, Novosibirsk. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 645–649, September–October, 1990. 相似文献
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G. F. Chernenko E. E. Ivanova Yu. V. Gatilov I. Yu. Bagryanskaya É. N. Shmidt 《Chemistry of Natural Compounds》1993,28(6):568-575
The chemical composition of a petroleum ether extract of the bark of the Siberian spruce has been studied. Extracts included saturated aliphatic alcohols and C16-C24 acids — abietic, dehydroabietic, isopimaric, oleic, lineolic, and linolenic — alkyl ferulates, ketones, and alcohols of the serratene type, and also 4-stigmasten-3-one. Onoceradienedione and onoceradienediol — precursors of the serratene triterpenoids — and also a saturated vicinal diol — triacontane-10,11-diol — have been isolated from the extractive substances of conifer in the native form for the first time.Novosibirsk Institute of Organic Chemistry, Siberian Branch, Russian Academy of Sciences. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 654–662, November–December, 1992. 相似文献
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G. F. Chernenko E. E. Ivanova Yu. V. Gatilov I. Yu. Bagryanskaya É. N. Shmidt 《Chemistry of Natural Compounds》1992,28(6):568-575
The chemical composition of a petroleum ether extract of the bark of the Siberian spruce has been studied. Extracts included saturated aliphatic alcohols and C16-C24 acids — abietic, dehydroabietic, isopimaric, oleic, lineolic, and linolenic — alkyl ferulates, ketones, and alcohols of the serratene type, and also Δ4-stigmasten-3-one. Onoceradienedione and onoceradienediol — precursors of the serratene triterpenoids — and also a saturated vicinal diol — triacontane-10,11-diol — have been isolated from the extractive substances of conifer in the native form for the first time. 相似文献
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G. F. Chernenko K. I. Demenkova E. E. Ivanova É. N. Shmidt 《Chemistry of Natural Compounds》1990,26(5):548-551
A study of the chemical composition of a petroleum ether extract of the bark of Yeddo spruce growing in Khabarovsk Territory has shown that the neutral fraction of the extract contained waxes, glycerides, diterpenoids — epimanool, cis- and trans-abienols, and phyllocladenol, and triterpenoids — the epimeric 3α-and 3β-methoxy-21-hydroxy-Δ14-serratenes and a ketone which has been ascribed the structure of 21-keto-3β-methoxy-Δ14-serratene. 相似文献
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L. A. Zemnukhova S. V. Isai E. D. Shkorina N. G. Busarova T. V. Kafanova 《Russian Journal of Applied Chemistry》2006,79(9):1538-1541
The lipid composition of the waste fine fraction (dust) from rice and buckwheat production was studied. 相似文献
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L. A. Zemnukhova S. V. Tomshich A. V. Kovekhova L. Yu. Greben’ 《Russian Journal of Applied Chemistry》2007,80(7):1170-1174
The composition and content of polysaccharides recovered from various samples of sunflower husks by their sequential treatment
with water, ammonium oxalate (or oxalic acid), and alkali were examined. The products were analyzed by X-ray diffraction and
IR spectroscopy.
Original Russian Text L.A. Zemnukhova, S.V. Tomshich, A.V. Kovekhova, L.Yu. Greben’, 2007, published in Zhurnal Prikladnoi
Khimii, 2007, Vol. 80, No. 7, pp. 1200–1205. 相似文献
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L. A. Zemnukhova G. A. Fedorishcheva E. D. Shkorina T. A. Kaydalova N. N. Barinov 《Russian Journal of Applied Chemistry》2011,84(4):565-571
The optimum conditions for the formation of amorphous silicon dioxide from wastes formed in ferroalloy production containing
more than 99% of the main substance were determined and its physicochemical properties were studied. 相似文献
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N. S. Velichkina T. V. Vlasova A. V. Kalashnikov V. Yu. Kol’tsov 《Russian Journal of Applied Chemistry》2014,87(7):994-997
The possibility for sorption of iodine from mother liquors with activated carbons of varied brands was determined. The sorbents were tested in laboratory in industrial conditions. The optimum brand of the sorbent was chosen. The optimal conditions for the iodine sorption and desorption were recommended. For activated carbon chosen, resource tests were performed. 相似文献
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S. S. Stavitskaya V. M. Vikarchuk N. N. Tsyba N. I. Bogdanovich V. F. Gaevskii Yu. P. Zaitsev N. T. Kartel’ V. V. Strelko 《Russian Journal of Applied Chemistry》2006,79(2):219-224
The structural and sorption characteristics of microporous sorbents from industrial lignin with respect to some toxic substances, Pb2+, Cd2+, Cu2+, and NH+ 4 ions, and also the possibility of accumulation of methane on these carbons were studied. Simple procedures for modification of the carbon surface to improve the sorption power of the carbons were suggested. 相似文献
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High Density polyethylene regranules reprocessed from separated household waste collection were investigated for migratable con-taminants which were not present in virgin material. Although the material originated from different European reprocessors, the de-tected recycling-specific compounds were similar in most of the investigated samples. At a chosen threshold concentration of 0.5 μg/g more than 70 compounds were tentatively identified. Aroma compounds and preservatives were found in the range of 0.5 to 10 μg/g. Limonene, di(ethylhexyl) phthalate, and the isopropyl esters of myristic and palmitic acids were detected in concentrations up to 200 μg/g. These compounds were found in almost all the regranules. Most of the substances identified are constituents of personal hygiene products and cleaning agents and are therefore absorbed by the package during the storage. Owing to European food legislation and German cosmetics regulations, the use of such recycling packaging material appears suitable only for filling with technical products. 相似文献