查询词典 vitamin B

D-Pantothenyl alcohol, also called ortho-vitamin 85, is an important nutrition suppled substance. It has been widely applied in the field such as medicine, cosmetic, foodstuff, feed additive, and so on. The preparation of D-pantothenyl alcohol and the optimization of key factor are discussed mainly in this paper. It mainly includes three section.In the first section, with formaldehyde, isobutyl aldehyde and diethyl oxalate as the starting materials, D-pantolactone is prepared via three steps including condensation, catalytic hydrogenation and physical resolution. The specific rotatory power of the product is consistent with imported product.

D-泛醇，俗称原维生素B_5，属维生素B旋类营养增补剂，广泛应用于医药、化妆品、食品、饲料等领域，本文着重探讨了其制备及关键因素的优化，主要内容可分三部分：第一是D-泛内酯的制备，先以甲醛、异丁醛和草酸二乙酯为起始原料合成酮基泛内酯，再经催化氢化得到DL-泛内酯，然后通过物理拆分获得D-泛内酯，得到产物的比旋光度与进口产品基本一致。

Slide culture: The strains were cultured on SDA,PDA,BCP-MSG, Milk Honey Agar and Vitamin B Complex Agars at 27℃and 30℃ for 3 weeks.

结论SDA、PDA均为鉴定和分离红色毛癣菌的合适培养基。5种培养基均可用来刺激红色毛癣菌产孢，其中SDA、PDA产孢较早、较丰富。

The traditional method to determine cyano cobalamin by HPLC cannot be used for rapid determination of vitamin B 12 in fermentation broth.

文中探索了一种不经氰化物转化而直接使用HPLC测定发酵液中维生素B12 (包括羟基钴胺素、脱氧腺苷钴胺素和甲基钴胺素)的检测方法。

Objective: To study the changs of serum ferritin,folate and vitamin B 12 in the cerebral infarctiongroup.

目的 ：探讨脑梗死患者血清铁蛋白、叶酸和维生素B12 (VitB12 )水平的变化。

And some compositae plants which can be used as vegetable and feeds stuff were also determined in term of crud protein, crud fiber, nitrogen-free extent, crude ash and vitamin C.

结果如下：（1）热带菊科植物中大量、微量元素含量丰富：49种菊科植物样品中超过高等植物植株N、P、K、Ca、Mg、S平均含量的分别占80%、90%、94%、100%、92%和100%；超过高等植物植株B、Cu、Fe、Mn、Mo、Zn平均含量的分别占84%、94%、98%、94%、98%和100%。

Vitamin B〓 and its derivatives are an important kind ofbioinorganic complexes including cobalt as their central atom. They'reinvolved in a lot of enzyme metabolism processes.

维生素〓及其衍生物是一类重要的含钴生物无机配合物，与生物体中多种酶的代谢过程有关。

These vitamin BC are to build up your resistance.

这些维生素B和C用于增强你的抵抗力。

Folic acid is Vitamin Bc made up of 2-amino-4-hydroxyl-6-methylpterin, para-amino benzoic acid and glutamic acid, transforming into tetrahydro-folic acid in the human body, the ones that participated in formatting amino acid and nucleic acid.

中文摘要：叶酸系由2-氨基-4-羟基-6-甲基蝶呤、对氨基苯甲酸及谷氨酸组成的水溶性B 族维生素，在人体内转化成四氢叶酸，参与氨基酸及核酸的合成。

Caused by deficiency of niacin (vitamin B3; nicotinic acid) and protein.

由于缺乏维生素b和蛋白质引起。

Vitamin [B.sub.12] exists in two primary forms: methylcobalamin and cyanocobalamin.

维生素 B12有两种存在形式：甲基维生素和氰钴维生素。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。