二酸的

The influence of acrylic acid and cetane alcohol,amount of catalyst and inhibitor,reaction temperature,reaction time were investigated.

实验结果表明，合成的最佳反应条件为：丙烯酸与十六酯的物质的量之比为1.2∶1，对甲苯磺酸的用量为0.6%，对苯二酚的用量为0.4%，反应温度为110℃，反应时间为5 h。

An intermediate and also common form, the B12-responsive phenotype, occurs in the first months or years of life; affected infants exhibit feeding problems, failure to thrive, hypotonia, and developmental delay, and sometimes have protein aversion and/or vomiting and lethargy after protein intake; they are also at risk for catastophic decompensation.

一种中度的也是常见的甲基丙二酸血症，B12敏感表型在出生头几个月／年发病；患病婴儿有哺食问题、生命力弱、肌张力低和发育迟缓，有些在摄入蛋白质后有蛋白质厌恶和／或呕吐和嗜眠的症状；他们同样也有严重的失代偿危险。

In general, the phosphoamino acid esters were unable to transfer their phosphoryl group to other hydroxyl nucleophiles even with the presence of imidazole, but the N-phosphoserine and threonine esters were two exceptions.

二、测定了部分磷酰化D—氨基酸的磷酰基转移反应速率常数，并对外消旋化合物的酯交换反应进行了旋光度跟踪，发现磷酰化丝、苏氨酸的对映体有明显的区别。

The exogenous glycinebetaine could enhance the accumulation of soluble sugar and praline, maintained higher antioxidase activity and the soluble protein content, and reduced the accumulation of MDA in cucumber leaves, which protected the stability and integrity of cell membrane.

结果表明：外源甜菜碱可促进黄瓜叶片中脯氨酸和可溶性糖的积累，保持相对较高的杭氧化酶活性和可溶性蛋白含量，削弱丙二醛的积累，对细胞膜的稳定性和完整性起保护作用。

The influence of various factors, such as n NCO / n OH , the content of extender and dimethylol propionic acid on the synthesis of water borne polyurethane and its film performance was studied.

研究了 n NCO/n OH、扩链剂及二羟甲基丙酸的含量对水性聚氨酯合成及涂膜性能的影响，确定了较佳的配方。

The invention relates to a method for manufacturing polyesters, in particular, to using a lithium titanyl oxalate as the catalyst for such reaction to provide fast reactions with excellent color properties for the resulting polyester.

本发明涉及一种制备聚酯的方法，尤其涉及采用钛氧基乙二酸锂作为此类反应的催化剂以加快反应，并使所得聚酯具有优良的色泽性能。

The present invention provides an improved method of producing polyester by the polycondensation of polyester forming reactants wherein the improvement comprises utilizing, as the polycondensation catalyst, lithium titanyl oxalate.

本发明提供了一种由制备聚酯用反应物的缩聚反应制备聚酯的改进方法，其中的改进包括使用钛氧基乙二酸锂作为缩聚反应催化剂。

Oneyear old poted Fraxinus velutina and Robinia pseudoacacia seedings were tested by neutral salt and mixed salt solutions.The dynamic changes of a,b and total contents of chlorophyll were studied and the correlation of chlorophyll with MDA and Pro was analysed.

用不同浓度的中性盐和碱性盐(NaCl、NaHCO3、Na2SO4、 Na2CO3)溶液处理1 a生刺槐和绒毛白蜡，研究了两树种叶片中叶绿素a、叶绿素b和总叶绿素含量的动态变化以及叶绿素和丙二醛、脯氨酸的相关性。

At last,in order to lighten the electrophoretic particles,0.2 g of the succinic acid modified SiO_2 particles were dispersed at 90 ℃ in 50 mL xylene solution dissolving 0.1 g polyethene,cooled and kept for 12 h,and then the particles were encapsuled by PE by means of centrifugal sedimentation at(10 000) r/min.

最后，为降低电泳颗粒密度，将0.2 g经丁二酸改性的S iO2颗粒，于90℃时加入已溶解了0.1 g 聚乙烯的50 mL二甲苯中，冷却静置12 h后，以10 000 r/m in的速度离心，使PE沉积包覆于电泳颗粒表面。

All animals were individually fed with a constant concentration and hay for 8 weeks. Results showed that VB12 production from cobalt in lambs was similar when using cobalt sulphate and cobalt chloride, and was significantly higher (P.05) in cobalt sulphate than in cobalt acetate. However, VB12 production significantly decreased in cobalt oxide treatment compared with other forms of cobalt sources. The relative bioavailability of cobalt sulphate, cobalt chloride, cobalt acetate and cobalt oxide was 100%, 95.66%, 89.50% and 22.56% respectively.

结果表明：1硫酸钴、氯化钴、乙酸钴、氧化钴的相对生物学有效率分别为100%、95.66%、89.50%和22.56%(P.01)；2硫酸钴、氯化钴、乙酸钴和氧化钴组血浆VB12的含量分别为1666.9、1594.5、1493.3和376.1pmol/L，硫酸钴、氯化钴组相近，乙酸钴组稍低，而氧化钴组明显下降，血浆甲基丙二酸含量为2.94、3.01、3.49和3.99μmol/L；同型半胱胺含量为8.91、9.23、9.97和10.78μmol/L，硫酸钴与氯化钴组相近，乙酸钴组稍有增加，而氧化钴组明显升高，3个指标反映了一致的钴营养状况。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。