別甾 的英文怎麼說
中文拼音 [biézāi]-
Abstract : methanesulfonic acid method was used to prepare five acylated chitins. except heptanoyl chitin, four of them, i. e. acetyl chitin, propionyl chitin, butyryl chitin and hexanoyl chitin, had high degree of substitution ( from 1. 5 to 2. 0 ) and exhibited lyotropic liquid crystalline behavior and cholesteric phase. as the length of the side chain increased the critical concentration ( w / w ) somewhat increased from 0. 21 to 0. 26 because the chain rigidity dropped. the critical concentration values of all the four derivatives were much higher than that of chitin ( 0. 12 ) due to the decrease of intramolecular hydrogen bonds. the four acylated chitin can form typical banded texture after being sheared. there minimum concentrations to form banded texture of them were evidently different, varied from 0. 25 ( for acetyl chitin ) to 0. 37 ( for hexanoyl chitin ). these results further indicated that liquid crystallinity decreased while the length of flexible side substituents increased
文摘:四種羧酰化甲殼素即乙酰化、丙酰化、丁酰化和己酰化甲殼素在二氯乙酸溶液中均呈現膽甾型溶致液晶相.臨界濃度隨側基長度增加而略有增加，衍生物的臨界濃度明顯都比原甲殼素高許多，這些規律都可以用鏈剛性的變化來解釋.四種羧酰化甲殼素在剪切時均能形成條帶織構，而且能形成條帶織構的最低濃度有明顯差別，隨側基長度增加而提高，進一步表明側基較長，液晶性減少First of all, the theoretic basis for the stereoisomer rearrangement of biomarker compound is illustrated, and then the corresponding relations between the sterane / terpane stereoisomer rearrangement and maturity, as well as the polarity / non - polarity and petroleum migration are discussed, respectively
首先闡明生物標志化合物立體異構重排的理論依據：然後分別探討了萜、甾烷類立體異構重排和成熟度對應關系；極性、非極性生物標志化合物異構體重排和油氣運移對應關系。A super acylation catalyst, 4 - dimethylamino pyridine ( dmap ), was prepared and used to synthesize cholesteryl ester compounds. four kinds of cholesteryl ester compounds such as cholesteryl p - alkoxyl benzoate, cholesteryl dicarboxylate, cholesteryl lumequeic ester and coattail - like cholesteryl ester were synthesized by acylation method and super acylation catalyst method. chemical structures and liquid crystal behaviors of the synthesized samples have been characterized by using element analysis, ftir, dsc and polarized microscopy with a hot stage
本文合成了高效酰化催化劑4 -二甲基氨基吡啶（ 4 - dimethylaminopyridine ， dmap ） ，採用酰氯化法和高效酰化催化劑法分別合成了對烷氧基苯甲酸膽甾醇酯、對稱脂族二羧酸膽甾醇酯、烯酸膽甾醇酯及燕尾型膽甾醇酯四類膽甾醇酯衍生物，並進行了化學結構和液晶性能的表徵。They were then prescribed a diet that included more specific foods, such as raw almonds, tofu and other soy foods, viscous fibers such as oatmeal, barley, okra and eggplant, and plant sterol - enriched margarine. after a year, the group who stuck faithfully to the new eating plan lowered their cholesterol by an average of 29 percent
詹金斯為他們制定的新飲食計劃中包括：一些特別的食物，如生杏仁豆腐和其他一些豆製品粘性纖維食品，如燕麥大麥秋葵和茄子富含植物甾醇的人造黃油等。Diosgenin, 16 dehydropregneninolone, acetate ( 16 - dpa ) are exacted from plant through high - tech, and used to produce steroid hormone intermediates and steroid intermediate, can be used to make cortisone, flcocinonidum, prednisone, progesterone, testosterone and similar hormones
皂素、雙烯產品是從薯蕷科植物中提取的，分別甾體激素藥主要起始原料和中間體，可用來製造膚的松、強的松、黃體酮、睪丸素等激素藥物。Some thousnads pharmacologists in beijing and from many colleges and institutions of other cities will be the enthusiatic audience of the meeting. in addition, a large number of graduate and postgraduate students will be not only be in the audience but also be the volunteers serving the foreign freedns attending the congress. we would like to share with all of you the new progress and achievement of modern pharmacology and traditional medicine
韓國國立漢城大學的金炳玉教授在自己工作的基礎上，綜述報告了靈芝三萜類化合物的藥效和生物活性，他指出在過去的30年中，從藥用真菌特別是在靈芝中獲得的三萜類化合物已超過200種，他將羊毛甾烯型三萜酸分為10類，並對其構效關系作了介紹。The results showed that when hogwash oil into edible oil upwards of 10 %, the characteristic peak of cholesterol could be observed obviously
利用極性毛細管色譜柱可將油脂中的膽固醇和植物甾醇很好地分離，從而可鑒別油樣中是否混有地溝油。分享友人