查询词典 p-phthalic acid

The paper introduced three processes to prepare isochroman from β-phenethyl alcohol and polyformaldehyde:HCl catalysis,AlCl_3 catalysis and toluene-p-sulfonic acid catalysis,and discussed its reaction mechanism,using toluene-p-sulfonic acid catalysis method to prepare isochroman ,the yield is 46%,purity is 96%.

用β-苯乙醇和多聚甲醛为原料，进行了HC l催化法，三氯化铝催化法和对甲苯磺酸催化法的合成路线的实验，并对其反应机理进行了探讨，应用对甲苯磺酸催化法合成异色满的合成路线，得率46%，纯度96%。

Black-yonggu dahongyu reaumuria 2b pigments(ⅲ, pgment index number: p.R.48: 2, purple-red powder, insoluble in water and ethanol, in case of concentrated sulphuric acid radiofrequent purple-red, red is blue, in case of concentrated nitric acid, radiofrequent Rufous red concentrated sodium hydroxide, thermotolerance.

永固红2B颜料，颜料索引号：p.R.48：2，紫红色粉末，不溶于水和乙醇，遇浓硫酸呈紫红色，稀释后呈蓝光红色沉淀，遇浓硝酸呈棕红色，遇浓氢氧化钠呈红色，耐热性好。

The results show different impacts of elevated pCO2 on the contents of salicylic acid, p-Hydroxybenzoic acid, cinamic acid, ferulic acid and vanillic acid, as well as phenylalnine ammonialyase activity in winter wheat leaves under low N and normal N levels.

结果表明，CO2浓度升高对小麦叶片水杨酸、对羟基苯甲酸、肉桂酸、阿魏酸和香草酸含量的影响随供氮水平的不同而有所差异。

The values of D10 and D for the total bacteria in boiled dumplings under chill state were 2.04 kGy and 4.00 kGy, the value of D10 and D for E. coli were 1.25 kGy and 2.00 kGy. TBAS were increased significantly and excessed the trade standard by 5 kGy γ-irradiation. However, the TBAS would be decreased with addition of antioxidants. Lipid peroxide,volatile basic nitrogen,"a" value of color and "b" value of color showed a tendency of increase, and moisture content and Aw showed a tendency of decrease, which did not achieve a significant level(p.05) by 1 to 5 kGy doses of γ-irradiation. Total acidity, amino acid nitrogen and free fatty acid showed no significant differences between treated and control samples. Sensory evaluation values were decreased and were all well within the acceptable level by 1 to 5 kGy doses of γ- irradiation.

辐照能有效降低鲜熟水饺细菌总数和大肠菌群数量，鲜熟水饺中细菌总数和大肠菌群的 D10值分别为 2.04 kGy 和 1.25kGy，D 值分别为 4.00 kGy 和 2.00kGy；0～5kGy 辐照鲜熟水饺 TBA 值随辐照剂量增加而增加，5kGy 辐照已使之超过国家行业标准限量要求；辐照鲜熟水饺过氧化值、挥发性盐基氮、色差 a 值、色差 b值存在随辐照剂量增加而增加的趋势、水分含量存在下降趋势，但变化未达到显著水平(p.05)；对酸度、氨基酸态氮、水分活度、游离脂肪酸含量等其他理化指标没有显著影响；较高剂量辐照使产品感官质量降低，却都在可接受范围内； 4kGy 辐照使维生素 B1下降 31.94%，对维生素 E、蛋白、脂肪、氨基酸、不饱和脂肪酸含量无显著影响。

Results The factors including age, exercise, the exposure time to cell phone and computer, refurnishing houses, ventilation, supplementary of folic acid, favoring frying food, reproductive knowledge, premarital consultation, parity, the opportunity of plan for conception and occupational stress were significant different between case and control groups (P.05). Logistic revealed that exercise (OR=0.319), ventilation (OR=2.496), supplementary of folic acid (OR=2.365), age (OR=1.106) and occupational stress (OR=2.159) were in the regressive model.

结果］年龄、体育锻炼、使用手机和电脑的时间、装修、通风、补充叶酸、偏爱煎炸食品、生殖知识、婚检、产次、计划受孕时间和职业紧张在病例组与对照组存在差异(P.05)，Logistic回归表明体育锻炼(OR=0.319)、通风(OR=2.496)、补充叶酸(OR=2.365)、年龄(OR=1.106)和职业紧张(OR=2.159)进入方程。

Effect of acid soil on dry matter accumulation and Al and nutrient contents of barleys differing in acid soil toleranceThe experiment was conducted by using 10 barley genotypes with different acid soil tolerance at seedling stages, each 5 genotypes for acid tolerance and sensitivity, to determine the difference in biomass accumulation, Al and nutrient content in the roots and shoots among genotypes under the condition of acid soil stress.

低pH和两种铝处理下植株各器官ca、Mg含量，茎杆和叶片P、K含量，叶片Fe、MO、Zn含量以及茎杆Zn、B含量和根系及叶片Mn含量均降低，铝福复合处理时降幅更大。100林MAI处理，大麦幼苗整个试验期间根系分泌的苹果酸、柠檬酸和唬拍酸含量与对照相比均增加，且耐铝基因型增幅大于铝敏感基因型，表明铝诱导这些有机酸分泌量增加可能与品种耐铝性有关。

Pparent amino acid digestibilities and true amino acid digestibilities of six feedstuffs (barley,cooking blood meal,fermented blood meal,protein hydrolysate mixed feed,heatextruded collagen protein and local fish meal) and their mixed feeds(J1 and J2) were determined with intact and caecectomized cockerels,using Sibbaled "TME" method,and their additivities were also tested.

本研究以去盲肠鸡和正常鸡按Sibbald的&TME&方法分别测定了皮大麦、蒸煮血粉、发酵血粉、水解复合蛋白、热喷胶原蛋白、国产鱼粉及其配合饲料J1和J2的氨基酸表观消化率和真消化率。并对两种试鸡所测上述饲料原料氨基酸的消化率及其可加性作比较。结果表明：（1）6种饲料原料的某些氨基酸表观消化率和真消化率，去盲肠鸡和正常鸡测值间存在显著差异（P＜0.05）。（2）去盲肠鸡内源氨基酸排出量显著高于正常鸡（P＜0.05）。

A series of p hydroxybenzoic acid oligomers were synthesized of p acetoxybenzoic acid (4 ABA).

用对乙酰氧基苯甲酸合成了一系列对羟基苯甲酸的齐聚物，由于这些齐聚物不溶于大部分有机溶剂，因此尝试用傅立叶红外谱半定量地分析齐聚物的聚合度。

A series of p hydroxybenzoic acid oligomers were synthesized of p acetoxybenzoic acid (4 ABA). Since the oligomers are insoluble in most organic solvent, we tried to analyze the degree of polymerization of the oligomers half stoichiometricly by the FT IR method.

用对乙酰氧基苯甲酸合成了一系列对羟基苯甲酸的齐聚物，由于这些齐聚物不溶于大部分有机溶剂，因此尝试用傅立叶红外谱半定量地分析齐聚物的聚合度。

With the aid of 〓P NMR examination for the process and ESI-MS/MS analysis of the derivatized products from the reaction intermediate, it is found that the corresponding phosphoryl chloride is generated after mixing the hydrogen phosphonate derivative with chlorodiisopropylamine, and they react with amino acid, amino acid methyl ester, dipeptide methyl ester or N-methyl imidazole carboxyl alkyl diamine respectively to form the desired products.

利用〓P NMR对反应过程监测以及对反应中间体衍生化后产物的ESI-MS／MS检测分析发现，氢亚磷酸二酯与氯代二异丙胺反应首先生成了磷酰氯中间产物，它继续与氨基酸、氨基酸甲酯、二肽甲酯、1-甲基咪唑-2-酰基烷基二胺等反应生成了目标产物。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。