正

The n-butyl lactate was synthesied by the esterification of lactic acid and n-butyl alcohol in presence of ammonium ferric sulfate dodecahydrate NH4Fe(SO4)212H2O,and the factor influencing on the yield of reaction were discussed.

摘 要：在十二水合硫酸铁铵催化下，由乳酸和正丁醇发生酯化反应合成了乳酸正丁酯。实验考察了该催化剂催化酯化合成乳酸正丁酯的醇酸比、催化剂用量、反应时间、反应温度诸因素对酯化率的影响。

ErmE derived from Saccharopolyspora erythraea, which encodes a ribosome dimethyltransferase, was expressed in S. thermotolerans, to increase the substance resistance during the biotransformation of tylosin to AIV.

研究表明acyB2基因应该是碳霉素生物合成基因簇中的一个全局性正调控因子，它不仅负责对acyB1基因的正调控作用，而且还至少负责对acyA基因和红霉糖糖基转移酶基因的正调控。

Theurinary IL-6 level positively correlated with density of glomerular matrix membrane, global sclerosis, fiber or fibrocellular crescents and interstitial fibrosis (p. 05). According to the degree of density of glomerular matrix membrane and interstitial fibrosis, urinary Col-IV level had better correlation than urinary TGF-betal and IL-6 levels.In IgAN, Col-IV showed increased expression in diseased renal tissue whereas the site of expression of TGF-betal was mainly localized within the cytoplasm of tubular epithelial cells. Interstial expressionwas also present but glomerular TGF-betal expression was found only in patients with heavy mesangial proliferation. There was a significant correlation between glomerular positivity for Col-IV and severity of histological damage. There was also a significant correlation between positivity for TGF-betal and Col-IV in the tubular epithelial and interstitial lesions. In contrast, there was no ralationship between glomerular positivity for TGF-betal and severity of histological damage.The urinary TGF-betal level paralleled tubular TGF-betal expression.

结果 ①IgAN患者尿TGF-β1、IL-6、Col-Ⅳ水平较健康人明显增高(P＜0.01)，该变化与血中的浓度无关(P＞0.05)；②尿TGF-β1水平与小管间质TGF-β1阳性表达呈正相关(P=0.000)，而与小球TGF-β1阳性表达无关(P＞0.05)，尿Col-Ⅳ水平与小球和小管间质Col-Ⅳ阳性表达均呈良好的相关性(P＜0.01)，还与小管间质TGF-β1阳性表达呈正相关(P＜0.05)：③小球Col-Ⅳ阳性表达与肾组织慢性病变密切相关(P＜0.05)，小管间质Col-Ⅳ和TGF-β1阳性表达均与肾小管间质病变呈良好的相关性(P＜0.01)，而小球TGF-β1阳性表达与肾组织损伤无关(P＞0.05)；④尿TGF-β1、Col-Ⅳ水平与肾小球基质基底膜面密度、小管间质病变呈正相关(P＜0.01)，与小球内细胞数呈负相关(P＜0.05)，该结果与其在组织中的表达一致；尿IL-6水平浙江大学硕士学位论文尿TGF一B一、IL一6和Col一IV在IgA肾病中的应用价值与基质基底膜面密度、球性硬化、纤维或细胞纤维新月体所占肾小球百分数及小管间质病变均有显著的相关性(F.05)；在轻度肾病理损伤时，尿'l'G卜pl、I卜6、Col一IV水平即升高，而尿Col一W在反映细胞外基质积聚和间质纤维化程度上比尿TGF一pl和IL一6有更好的相关性。

Our main products category has chloride (pivaloyl chloride, acetyl chloride, Propionyl chloride, methyl acryloyl chloride, butyl chloride, 2 - furyl chloride already chloride, acryloyl chloride, is amyl chloride, etc.) and acids (positive acid, pivalate, propionate, acetic acid, methyl acrylate, 2 - furoic acid, etc.) and so on dozens of products.

我公司主要生产的产品有酰氯类（特戊酰氯、乙酰氯、丙酰氯、甲基丙烯酰氯、正丁酰氯、2-呋喃甲酰氯、己酰氯、丙烯酰氯、正戊酰氯等）和酸类（正丁酸、特戊酸、丙酸、乙酸、甲基丙烯酸、2-呋喃甲酸等）等几十种产品。

The fatty acid in soybean oil had been determined with a main composition of hexadecanoic acid C(subscript 16:0, 8.6%, octadecenoic acid C(subscript 18.2, 52.1%, octadecenoic acid C(subscript 18:1, 33.1% and octadecanoic acid C

而加氢产物中检测到正构烷烃同系物，以正构十七烷烃和正构十八烷烃的含量最高，分别约为16.5%和18.5%，同时检测到少量烷基苯同系物等芳烃化合物。

The first can say be the front completely, of not hydrous cent, really true advantage.

第一条可以说完全是正面的，不含水分的，真真正正的好处。

Just the CTK content, the ABA content in its tiller node were most significantly related and most significantly negatively related to the tiller number of intervarietal hybrid respectively, but beside the CTK content, the ABA content in its tiller node were significantly related and significantly negatively related to the tiller number respectively, the IAA content were also most significantly related to the tiller number of interspecific hybrid, this may be the reason why the interspecific hybrid had a high fertile spike heterosis.

品种间杂种分蘖盛期分蘖节仅细胞分裂含量与分蘖数呈极显著的正相关，而脱落酸含量与其分蘖数呈极显著的负相关。而种间杂种分蘖盛期分蘖节中的细胞分裂素含量与其分蘖数显著正相关、脱落酸含量与其分蘖数呈显著负相关，另外其分蘖节中的生长素含量也与其分蘖数呈极显著正相关，IAA在种间杂种中的共同参与可能是种间杂种具有较强的分蘖成穗能力的原因。

When the amount of SO(superscript 2- subscript 4)/ZrO2 catalyst was 7% of the mass of β-pinene, the yield of product was 62.0%, and the mass ratio of borneol to isoborneol in the product was 13.6:48.7. When the amount of S2O(superscript 2- subscript 8)/ZrO2 catalyst was 7% of the mass of β-pinene, the yield of product was 66.7%, the mass ratio of borneol to isoborneol in the product was 11.5:49.5. Both two catalysts were poor for borneol selectivity.

在上述反应条件下，当催化剂SO(上标 2-下标 4)/ZrO2用量为7%时（以β-蒎烯质量计，下同），粗龙脑产率为62.0%，产品中正、异龙脑比为13.6：48.7；当催化剂S2O(上标 2-下标 8)/ZrO2用量为7%时，粗龙脑产率为66.7%，正、异龙脑比为11.5：49.5；这两种催化剂对正龙脑选择性比较差。

The diagrams indicate that microemulsions can only be formed with a certain Combination of SDS and n-bulanol. A stretch of microemulsion domain changing continuously from direct micelles to bicontinuous structures and to reverse micelles exists when the surfactant to cosurfactant ratio is comparatively low, while the direct micelle area is separated from the reverse micelle area by a mesomorphic medium when the surfactant to cosurfactant ratio is comparatively high.

结果表明：只有当SDS与正丁醇配比在一定范围内才形成微乳状液；当SDS含量较低时，存在由正胶束经过双连续结构到逆胶束的大片微乳状液区；当SDS含量较高时，正胶束和逆胶束微乳状液之间被液晶相所分割。

The starch-cyclodextrin microspheres were prepared by using starch/β-cyclodextrin as raw material, normal hexane as dispersed phase, Span60 and Tween60 as emulsifying, pentanol as assistant of emulsifying, and metaphosphoric acid trisodium salt as linking agent.

纳米微球以可溶性淀粉和β-环糊精为原料，选用正己烷为油相，Span60和Tween60为乳化剂，正戊醇为助乳化剂，三偏磷酸钠为交联剂，以对亚甲基蓝的去除率为指标进行了单因素和正交试验。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。