酸价

After the supplement of L-Leu, extracellular isovaleric acid was accumulated in vitro and then reabsorbed for eutilization, the ultimate relative content of isovalerylspiramycin II, isovalerylspiramycin III was increased by 41% and 50% respectively, and the relative content of total isovalerylspiramycins increased by 41.9% with the biological titer of biotechspiramycin being equal to that of the control group.

添加Leu对初级代谢影响不大，异戊酸在胞外积累，随后被重新吸收利用，最终异戊酰基螺旋霉素II和异戊酰基螺旋霉素III组分分别提高了41%和50%。同时总异戊酰基螺旋霉素相对含量也比对照提高了41.9%，效价和对照基本一致。

The dissertation mainly consists of two parts:1. The Reaction Chemistry of Alkynes under Palladium Catalysis Part 1 studies the reaction α,β-unsaturated carbonyl compounds with alkenylpalladium intermediate generated by nucleopalladation, and discovered 1 the Pd-catalyzed tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls,2 the four-component tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls, 3 the tandem intramolecular oxypalladation-conjugate additionreaction of alkynoic acids with α,β-enals. These new reactions provide notonly efficient highly stereoselective methods for the synthesis of γ,δ-unsaturated,polyunsaturated carbonyl compounds and γ-lactonic aldehydes, but also thebasic transformations for a number of C-C bond formation reactions which can be usedto design synthesis of many acyclic, cyclic or polycyclic compounds.

本论文的主要工作分为两个部分：一、钯催化下炔烃的反应化学在本小组前人工作的基础上，我们详细研究了炔烃亲核钯化产生的烯基钯中间体与α，β-不饱和羰基化合物的反应，发现两价钯催化下卤离子-炔烃-α，β-不饱和醛酮的串联加成反应、卤离子-炔烃-α，β-不饱和醛酮的西组分串联加成及炔酸分子内氧钯化-串联Michael型加成反应；由此发展了γ，δ-不饱和醛酮、多不饱和羰基化合物和带有醛酮基侧链的γ-丁内酯衍生物的高立体选择性合成方法，这一过量卤离子存在下的烯基钯对α，β-不饱和羰基化合物共轭加成反应的发现，为大量碳-碳键形成反应的实现提供了基础，使我们能够从这一基本反应出发，设计和开发多种分子内、分子间的碳碳成键反应，以好的立体、区域选择性组建开链、环状及多环类型的化合物。

In this study, the effect of ferrate oxidation on stability of microcystins LR in freeze dried Oscillatoria amoena was investigated.

高铁酸盐（FeO2－4）的稳定性直接关系到其多功能净水效能的发挥，定性和定量地分析了高铁在不同pH范围内的稳定性及三价铁盐等因素对高铁稳定性的影响，并从高铁分解历程的角度给予了合理的解释。

In an acetate buffer medium of pH 6.6, a colored complex was formed between pentavalent vanadium ion and pyrogallic acid.

于pH 6.6的乙酸盐缓冲溶液中，五价钒离子与焦性没食子酸反应生成有色络合物。

Any of three anions,VO3,VO4,or V2O7,containing pentavalent vanadium.

钒酸盐三种阴离子，VO3，VO4，或V2O7之一，含有5价的钒

Part of test solution is abstracted and in hydrochloric acid, W is reduced to quintavalent W and producing yellow complex compound with patassium rhodanate by dual reducting agents of tin chloride and titanium oxide.

吸取部分试液，在盐酸介质中，以氯化亚锡—三氯化钛双还原剂将钨原成五价并与硫氰酸钾生成黄色络合物。

The method of activating hydroxyls of fullerenols using 2-fluoro-l-methylpyridinium p-tolu- ene sulphonate to covalently linking with bovine serum albumin and further its effect on BSA was studied.

考察了2-氟-1-甲基吡啶对甲苯磺酸盐对富勒醇羟基的活化方法，以便将富勒醇通过共价交联的方法与牛血清白蛋白连接，进而研究富勒醇修饰对BSA所造成的影响。

These results indicate that the tetravalent ions doped LiNbO3 will be the excellent nonlinear optical crystals.

这些实验结果表明，四价掺杂铌酸锂晶体有望成为出色的非线性光学晶体。

Among the many organic derivatives of POMs, organoimido derivatives have attracted particular interest.

在多金属氧酸盐的有机共价衍生物中，有机亚胺的衍生物尤为引人注目。

Professional copper (brass, red bronze, green bronze, copper), nickel, black nickel, copper-zinc alloy, antique handicrafts, galvanized, imitation gold, black gun, pickling, trivalent chromium, and zinc , color zinc, blue white zinc, including all types of mold plating and mechanical products, such as the size of items within the outer diameter chrome-plated hardware, are to achieve the national leading level, and are members of the Association of Ningbo City, electroplating units, the stability of the credibility of the national quality assurance business!

专业镀铜（黄铜、红古铜、青古铜、紫铜）、镀镍、黑镍、锌合金镀铜、工艺品仿古、镀锌、仿金、枪黑色、酸洗、三价铬、黑锌、彩锌、篮白锌，包括电镀各类模具及机械产品、大小件内外径等镀硬铬，皆达到全国领先水平，而且是宁波市电镀协会会员单位，全国质量稳定信誉保证企业！

He knows that he's one of the mostdominant players in the NBA right now.

我知道他现在是联盟里最有统治力的球员之一了。

Using analysis method of BCG , the dissertation analyzed the management of voluntary service organizations .

利用BCG分析方法对我国的志愿服务组织管理进行了分析。