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《化学分析计量》2009,(2)
国家“十一五”科技支撑计划的生活用海水集成技术研究及应用研究子课题海水净化微生物絮凝剂研究工作,目前已取得阶段性成果。海水微生物絮凝剂是一种天然高分子絮凝剂,具有可生物降解性、无二次污染等优点,是当前絮凝剂研究领域的热点。承担该任务的国家海洋局天津海水淡化与综合利用研究所课题组成员经过科研攻关,成功地从土壤和污泥中筛选出具有絮凝效果的微生物产生菌菌株,完成了对海水微生物絮凝剂产生菌菌种的鉴定等工作。初步确定了絮凝剂的有效成分和絮凝活性分布,确定了实验条件下投加量、水力条件、无机盐和pH值等的最佳取值范围,为海水微生物絮凝剂的应用等后续研究工作提供了有效支持。(中国化工仪器网)新型海水微生物絮凝剂研制取得初步成果 相似文献
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高分子絮凝剂在水处理技术中占有十分重要的地位,而且已成为目前废水处理中的一类不可缺少的重要试剂。本文介绍了高分子絮凝剂的絮凝机理、种类、性质及其应用。 相似文献
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有机阳离子高分子絮凝剂 总被引:2,自引:0,他引:2
近年来,有机阳离子高分子絮凝剂得到国内外学者的广泛重视.它的研究、开发、应用都取得了显著进展.本文对此进行评述和介绍,内容涉及阳离子型聚丙烯酰胺接枝共聚物、羟基醚化类、二烷基二烯丙基卤化铵类和环氧氯丙烷与胺反应物,特别是近年来淀粉等天然高分子改性阳离子型絮凝剂和人工合成的无毒有机阳离子高分子絮凝剂. 相似文献
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用常见无机和有机絮凝剂处理了聚驱污水,分别考察了絮凝剂单剂和复配处理后聚驱污水中残余部分水解聚丙烯酰胺(HPAM)质量浓度和透光率随絮凝剂剂量的变化.结果表明:采用无机絮凝剂处理聚驱污水时,残余HPAM质量浓度随絮凝剂剂量增加先减小后增大;采用有机絮凝剂处理聚驱污水时,残余HPAM质量浓度随絮凝剂剂量增加而线性增加.将无机絮凝剂与无机絮凝剂复配使用,则残余HPAM质量浓度与透光率成反比;将无机絮凝剂与有机絮凝剂复配使用,则残余HPAM质量浓度取决于复配体系中阳离子聚丙烯酰胺(CPAM)的添加量. 相似文献
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A. S. Imamkhodzhaeva A. P. Ibragimov Sh. Yu. Yunuskanov 《Chemistry of Natural Compounds》1995,31(3):376-378
We have studied the proteins of the pollen and ovules of the cotton plant. No differences were observed in the electrophoregrams of the proteins from Gossypium hirsutum L. and from G. barbadense L. In the spectrum of the pollen proteins, the main components quantitatively were polypeptides with molecular masses of 34, 44, 47, and 52 kDa. The species G. raimondii Ulbr. differed considerably, with the main polypeptides quantitatively having molecular masses of 27, 36, 46, and 58 kDa. In representatives of genomic group C, interspecies differences were observed in the protein spectra of the pollen. No appreciable differences were observed spectrally in the proteins of the cottonplant ovules.Biolog Scientific Production Combine, Academy of Sciences of the Republic of Uzbekistan, Republic of Uzbekistan, Institute of Genetics, Academy of Sciences of the Republic of Uzbekistan, Republic of Uzbekistan, Tashkent ul. F. Khodzhaeva, 28. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 454–456, May–June, 1995. Original article submitted September 13, 1994. 相似文献
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Literature information on the HPLC of alkaloids, including adsorption, reversed-phase, ion-exchange, ion-pair, and other variants
is generalized. Results are given of the chromatographic analysis of various classes of alkaloids with an indication of the
conditions of separation, and the columns used, and also of the methods of detection. The advantages and disadvantages of
the HPLC variants are discussed. The review includes the literature over the last 14 years.
Scientific Center for Chromatography, Institute of Chemistry and Physics of Polymers, Uzbek Academy of Sciences, Tashkent.
Institute of the Chemistry of Plant Substances, Uzbek Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii,
No. 5, pp. 595–613, September–October, 1991. 相似文献
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Institute of the Chemistry of Plant Substances, Academy of Sciences of the Republic of Uzbekistan, Tashkent, fax (3712) 89 14 75. Institute of Physiology and Biophysics, Academy of Sciences of the Republic of Uzbekistan, 700095, Tashkent, ul. Niyazova, 1. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 625–627, July–August, 1995. Original article submitted November 9, 1994. 相似文献
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D. T. Asilbekova S. D. Gusakova I. P. Nazarova Kh. S. Mukhamedova A. A. Tyshchenko A. I. Glushenkova 《Chemistry of Natural Compounds》1989,24(4):424-429
The compositions of cottonseed soapstocks from first-grade and low-grade cotton seeds have been studied by the methods of CC on polyamide and on silica gel, TLC, GLC, ESR, and UV, IR, and mass spectrometry. It has been found that saturated, and also oxygenated, fatty acids, nonpolar acylglycerols, glycolipids, sterols, arylalkanes, gossypol pigments, and ions of metals of variable valence are concentrated in the acid fat of the soapstock from low-grade seeds. The soapstock contains a very small amount of tocopherols and phospholipids, mainly phosphatidylinositols. The combined gossypol pigments of the soapstocks include stabilized gossypol radical ions.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 502–508, July–August, 1988. 相似文献
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We apply differential scanning calorimetry (DSC) to measure the kinetics of the β→δ solid-solid phase transition of octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine, HMX. Integration of the DSC signal gives a direct measurement of degree of conversion. Data is analyzed by first-order kinetics, the Ozawa method, and isoconversional analysis. The range of activation energies found in this work, centering around 500 kJ/mol, is much higher than previously reported values by Brill and co-workers [AIAA J. (1982)], 204 kJ/mol [1], and Henson et al. and Henson and co-workers [B. Henson, L. Smilowitz, B. Asay, P. Dickson, Thermodynamics of the beta to delta phase transition in PBX-9501, in: Proceedings of American Physical Society Topical Group on Shock Compression of Condensed Matter, American Institute of Physics, Atlanta, GA, 2001; L. Smilowitz, B. Henson, J. Robinson, P. Dickson, B. Asay, Kinetics of the beta to delta phase transition in PBX-9501, in: Proceedings of American Physical Society Topical Group on Shock Compression of Condensed Matter, American Institute of Physics, Atlanta, GA, 2001; P.M. Dickson, B.W. Asay, B.F. Henson, C.S. Fugard, J. Wong, Measurement of phase change and thermal decomposition kinetics during cookoff of PBX-9501, in: Proceedings of American Physical Society Topical Group on Shock Compression of Condensed Matter, American Institute of Physics, Snowbird, UT, 1999], 200 kJ/mol [4]. We discuss possible reasons for the higher activation energies measured here but do not identify the cause. 相似文献
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The present review gives the main advances made in the laboratory of alkaloid chemistry of the Institute of Plant Substances of the Usbekistan Republic Academy of Sciences [IKhRV AN RUz] (Tashkent) over 50 years in the field of the chemistry of diterpene, isoquinoline, quinoline, steroid, indole, spiropiperidine, sulfur-containing, tropane, pyrrolidine, quinazoline, quinolizidine, amaryllis, and pyrrolizidine bases and possible routes for the biosynthesis of some of these groups of alkaloids.Institute of Chemistry of Plant Substances, Uzbekistan Republic Academy of Sciences, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 1, pp. 3–33, January–February, 1993. 相似文献
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A. Karimov M. G. Levkovich N. D. Abdullaev R. Shakirov 《Chemistry of Natural Compounds》1993,29(3):361-364
The alkaloid compositions of the roots, young shoots, and leaves of Berberis sibirica have been studied, and berberine, palmatine,
columbamine, berberrubine, oxyacanthine, berbamine, 8-oxoberberine, 8-oxoberrberubine, pakistanine, and pronunciferine, and
also the new base N-acetylhomoveratrylamine have been isolated. This is the first time that any of these alkaloids, except
berberine, have been isolated from this plant.
Andizhan State Medical Institute. Institute of the Chemistry of Plant Substances of the Academy of Sciences of the Uzbekistan
Republic, Tashkent. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 424–428, May–June, 1993. 相似文献
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M. Nigmonov N. I. Koryakina V. K. Burichenko L. I. Lavrent'eva 《Chemistry of Natural Compounds》1988,24(3):338-342
The results are given of a study of the quantitative content of protein in the seeds of some pea varieties and mutants, the activity of the total inhibitor proteins, and correlations of their activity with the protein content of the seeds and the amino acid compositions of the proteinase inhibitors. Considerable differences have been found in the amounts of a number of amino acids of the protein inhibitors of parental varieties and mutants of the pea, the amounts of serine, glutamic acid, alanine, and valine correlating positively with the inhibitor activity.Institute of Plant Physiology and Biophysics, Tadzhik SSR Academy of Sciences, Dushanbe. V. I. Nikitin Institute of Chemistry, Tadzhik SSR Academy of Sciences, Dushanbe. Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 399–404, May–June, 1988. 相似文献
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R. F. Klevtsova A. D. Vasil'ev L. A. Glinskaya A. I. Kruglik N. M. Kozhevnikova V. P. Korsun 《Journal of Structural Chemistry》1992,33(3):443-447
Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences. Institute of Physics, Siberian Branch, Russian Academy of Sciences. Buryat Institute of Natural Sciences, Siberian Branch, Russian Academy of Sciences. Translated from Zhurnal Strukturnoi Khimii, Vol. 33, No. 3, pp. 126–130, May–June, 1992. 相似文献
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Conclusions 1. The chemical composition of mixtures of resin acids isolated from the balsams of native conifer species, Scotch, Crimean, and Siberian pines andP. hamota andP. pityusa, Norway spruce, and Siberian larch, has been studied by the GLC method.2. The following resin acids are present in the balsams: pimaric, sandaracopimaric, levopimaric, palustric, isopimaric, abietic, dehydro- and dihydroabietic, neoabietic, four acids of undetermined chemical structure, and fatty acids. The balsams differ in the quantitative composition of the resin acids that they contain.Institute of Physical Organic Chemistry, Academy of Sciences of the Belorussian SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 539–541, September–October, 1970. 相似文献