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- Optical purity of trans-DCCA can be analyzed by a similar method. 对反式二氯菊酸对映异构体光学纯度的分析,可采用类似方法。 新型旋光性N-酞基丙氨酸类化合物的研究
- The optical purity of cis-R(+)-and cis-S( -) -DCCA was 93.7% and 81.8%, respectively. 顺式-R(+)-和顺式-S(-)-二氯菊酸光学纯度分别为93.;7%25、81
- The yield of benzoin up to 61% with optical purity of 23.6% was obtained in thepresence of borax. 在硼砂溶液中;安息香的收率高达61%25;光学纯度23.;6%25
- A new method for enantioseparation of dopa was established. Then,we applied this method to the optical purity testing of dopa. 建立了多巴手性分离新体系,并应用于左旋多巴光学纯度检测。
- METHODS:The D-ring synthon was synthesized starting from(+)-3-endo-bromocamphor.RESULTS:The two novel D-ring synthons are of high optical purity. 方法:以(+)-内向-3-溴莰酮-2为手性源,立体控制合成含偕二甲基的手性D环合成子。
- An optical purity of 99% (e.e) was obtained and the yield of (5)-CHBE reached 96.6% when initial concentration of COBE was 6.05g/L. 值大于99%25。 在水/乙酸丁酯两相体系中;100 g/L的E.
- A novel and accurate HPLC method was developed for the determination of optical purity of mandelic acid(MA) enantiomers. 建立了一种用高效液相色谱(HPLC)测定扁桃酸光学纯度的新方法。
- Duloxetine Hydrochloride was eventually obtained in more than 98% optical purity by resolution using commercially available L-(+)-mandelic acid. 选用廉价易得的(S)-mandelic acid对消旋的产物进行拆分,得到光学纯度98%25以上的度洛西汀。
- Therefore,it is important to control strictly reaction conditions for removing cystine's mesoisomer and making L-cystine of high optical purity. 严格控制反应条件,分离除去内消旋胱氨酸是制取高光学纯度L-胱氨酸的重要措施。
- The optical purity of cis _ R(+) _ and cis _ S(-) _ 2,2 _ dimethyl _ 3 _(2,2 _ dichlorovinyl)cyclopropanecarboxylic acid was 93.7% and 81.8%, respectively. 结果显示 ;顺式_R( +)_2;2_二甲基_3_(2 ;2_二氯乙烯基 )环丙烷羧酸光学纯度为93.;7%25;顺式_S( -)_2;2_二甲基_3_(2;2_二氯乙烯基 )环丙烷羧酸光学纯度为81
- The sample was characterized by polarimeter, IR and 1H NMR analysis, and the results demonstrated that chemical and optical purity of the sample were both above 99%. 样品经旋光仪、红外光谱和核磁共振表征,表明其化学纯度和光学纯度均达到99%25以上。
- By way of lipase-catalyzed double resolution several applications for the preparation of chiral organic compounds with high optical purity and good yield are described. 本文介绍了几种脂肪酶催化的两次拆分法,此法可用于高产率地制备高光学纯手性有机化合物。
- The high performance capillary electrophoresis (HPCE) method was established for determining the optical purity of (+) and (-) meptazinol hydrochloride. 建立测定美普他酚对映体的毛细管区带电泳法,代替国外HPLC手性柱的方法,用于检测左旋体和右旋体的光学纯度。
- The reduction was conducted in Tris-HCl buffer, and the concentrations of COBE and CHBE and the optical purity of product were determined by capillary GC and HPLC equipped with a chiralcel OB column, respectively. The product was mainly D-(S)-CHBE. 实验发现 ;在水相体系中主要生成 D (S) 型产物 ;COBE的转化率及CHBE的收率和光学选择性都比较高 .
- The ratio of the two competitive dissociation rates is related to the enantiomeric composition of the mixture,and thus can be used to determine the optical purity of the chiral compound. 与其它常见手性测定方法相比,质谱动力学方法无需湿法化学处理和色谱分离步骤,操作简单、快速、灵敏,因而被广泛应用。
- His optic nerve was hurt in an accident. 他的视神经在一次事故中受到损伤。
- Optical Purity Analysis of Levodopa Drug by Capillary Electrophoresis 毛细管电泳法测定左旋多巴药片的光学纯度
- Microscopes and telescopes are optical instruments. 望远镜和显微镜是光学仪器。
- Keywords d-Isopulegol;column packed with catalyst;high optical purity; 异蒲勒醇;催化剂填充柱;高旋光纯度;
- The optic theory originated with Einstein. 光学理论是爱因斯坦首创的。