高甾類 的英文怎麼說
中文拼音 [gāozāilèi]
高甾類
英文
homosteroid-
This oil is characterized by relatively low isomerization ratios of steranes, but slightly higher density and viscosity than those of type 1
該類原油甾烷異構化指標偏低，粘度和密度相對高於第一類原油，但仍為稀油。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。Steranes and terpanes in high mature - over mature oil and source rock cannot be identified well because of their quite low content
對于高成熟過成熟的原油和生油巖，由於甾萜類化合物含量大低往往鑒定效果不好或根本檢測不到。Oil type 1, non - biodegraded oil, is characterized by low viscosity, low density, high content of saturated fraction, low content of resin and asphaltene and high ratio of isomerization of steranes
第一類原油粘度和密度低，族組成以飽和烴組分為主，非烴和瀝青組分含量低，甾烷異構化指標高，未遭受生物降解。Oil type 2, also non - biodegraded, is characterized by extremely high viscosity, relatively high density, low content of saturated fraction, high content of resin and asphaltene and low ratios of isomerization of steranes
第二類原油粘度特大，密度相對較高。族組成以非烴和瀝青質組分為主，飽和烴含量低。甾烷異構化指標低，未遭受生物降解。Beijing keyifeng biotech development co., ltd. is a high - tech enterprise engages in the manufacturing and research of steriod raw materials and related intermediates
北京市科益豐生物技術發展有限公司是一家專業從事甾體激素類原料與中間體生產及新產品開發的高技術企業。分享友人