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The spectra of X-ray diffract revealed that its crystal is B type and the value is about 18%, far lower than that of ordinary maize starch. With the method of chemistry modification, we modified the amylose starch with acetates. The result showed that the best reaction condition was at the ratio of 1:5.3 (glucose: acerbity), with MSA 1.5% catalyzer, at 75℃ for 3 h.

利用化学改性法对高直链玉米淀粉进行醋酸酯化改性，最佳反应条件为，淀粉葡萄糖基与酸的质量比1：5.3、催化剂甲磺酸用量为体系的1.5%、反应温度75℃、反应时间3 h，在此条件下可制备取代度为2.84的醋酸酯淀粉，比普通玉米淀粉高0.78。

Abstract］ objective to observe the effects of indapamide and losartan alone and combined treatment on the elder patients with hypertension,hypokalemia,hyperglycemia,uric acid,lipid,ect.methods one hundered and fifty patients with hypertension were randomly divided into three groups,with each of 50 cases.the levels of blood pressure,hypokalemia,blood sugar,uric acid,lipide were examined before and after treatment.results after 8 weeks the systolic and diastolic blood pressure were significantly lower.antihypertensive treatment group is the best,the levels of hypokalemia is lower after treatment in the indapamide group,the levels of uric acid is also lower in the losartan group and antihypertensive group.conclusion losartan and indapamide combined treatment not only coordinate to decrease blood pressure but also reduce uric acid,reduce the effect of hypokalemia caused by indapamide.

目的 观察氯沙坦与吲哒帕胺单独应用或联合用药对原发性高血压患者血压、血钾、血糖、尿酸、血脂的影响。方法将符合诊断标准的150例老年高血压患者电脑随机分为3组，每组50例，进行用药前后自身对照试验，8周后检测各组血压、血钾、血糖、尿酸、血脂值。结果 3组治疗后收缩压和舒张压均较前明显降低，联合治疗组降压幅度最大，氯沙坦组和联合治疗组治疗后尿酸值较治疗前降低，吲哒帕胺组治疗后血钾值较治疗前降低。结论氯沙坦与吲哒帕胺联合应用不仅具有协同降压作用，而且能降低尿酸，减轻吲哒帕胺引起的低钾血症。

Result In 5 kinds of chemical treatments, treating Z. macrostachya seeds with 20 % NaOH solution for 20 min and then cleaning the seeds with clear water got the best effect of breaking seed dormancy. By this treatment, the seed germination potential reached 83.5% in 10 d, being 58.2 % higher than CK; reached 85 % in 15 d, being 55 % higher than CK, which was near to the potential germination rate of Z. macrostachya seeds. Compared with CK, the germination duration was obviously shortened.

结果］在5种化学处理中，用浓度20%NaOH溶液处理大穗结缕草种子25min，再用清水清洗，对解除种子休眠效果最佳，10d发芽势达83.5%，比对照高出58.2百分点，15d发芽率达85%，比对照高出55.0百分点，已接近大穗结缕草种子的潜在发芽率，发芽历时比对照明显缩短。

Four different ionic liquids, BF4, BF and PF6 were investigated, arid PF6 showed the best effect when used as the reaction media, giving the highest yield in the shortest reaction time. Promoted by KF in PF6, N-aryl or N-alkyl monosubstituted sulfonamides could react with various activated halides and unactivated primary halides smoothly. Reactions were performed at 85℃ for 2~10 hours, and thirteen N-alkylation products were obtained with 70%~97% yields. Moreover, the ionic liquid recovered could be reused for three times with no appreciable decrease in yield and reaction rate.

结果表明，以PF6为反应介质时显示出了最好的效果，反应的时间最短，收率最高。N-芳基或N-烷基单取代的磺酰胺和各类不同结构的活化的卤代烃和未活化的一级卤代烃在PF6中KF作用下，85℃反应2~10h，以70%~97%的优良收率得到了13个N-烷基化产物，而且离子液体回收使用3次后效果未降低。

The results showed that 7-day-precultured embryogenic calli had the best responses for bombardment among 2-7 day' preculture duration. Enhanced transformation efficiency was found in the explants treated with high osmotic medium 4h prior to till 24 h after bombardment. Particles of gold and tungsten were both found suitable for rice transformation and there was no adverse effect when tungsten particles were reduced to 1/3 standard amount for DNA precipitation on transient GUS gene expression. However, it was found that gold particle had higher GUS expression at 120 h post-bombardment. A preliminary microprojectile transformation system with an average of 15-20 blue spots/explant GUS expression was routinely obtained for 'Tainung 67' by using the particle gun with 1,100 psi rupture disk, 6 or 9 cm microcarrier flight distance and 4 mm of macrocarrier flight distance setting.

初步结果显示，以预培养2~7日之胚性癒合组织逐日测试转殖率，以预培养7日之培植体表现最佳；培植体於转殖前4小时至转殖后24小时以高渗透压培养基处理，有助於转殖效率之提高；比较金、钨粒子对转殖率在转殖后48h並无不同，但转殖后120 h取样，则金粒子组有较高之蓝点数；钨粒子用量可减少至1/3標准用量对转殖率並无影响；利用基因鎗在使用1， 100 psi裂碟片、大载片至挡片之距离为4 mm、微载髁至射击目標之飞行距离6或9 cm之设定，GUS基因表现之平均蓝点数均可达15~20个／培植体。

With the analysis and discussion of their photoini- liability, it was indicated that their max are all around 330 nm, and all of them have excellent solubility in water and good photoinitiability. Furthermore, the three Photoinitiators with α-tert-amine are obviously superior to the one with just α-sec-amine. Among the four photoinitiators l-(4-aminophenyl)-2-diethylamino-l- propanone dihydrochloride is the best and it has excellent use value.

通过对它们的光引发性能测试和构效关系的分析探讨，表明四种光引发剂的最大吸收波长λ_(max均在330nm左右，具有优异的水溶性和良好的光引发性能，其中具有α-叔胺基团的三种光引发剂明显优于具有α-仲胺基团的光引发剂，尤其以1-(4-氨基苯基)-2-二乙胺基-1-丙酮盐酸盐的光引发性能最好，具有推广应用前景。

Medium supplemented with 3 mg/L BA in combination with 0.1 mg/LNAA produced the best response in protocorm occurrence(80%) without addition of any organic material.

相同培养基继代，4周内即可发育成幼苗。在含有IAA(0 。1mg/L)的MS培养基中，4 0 %的幼苗可以诱导生根，并移植成功。

The best way to prepare Guizhi Fuling Pills Decoction is as follows,first, extracting Herbal pieces With volatile components(Ramulus Cinnamomi,Cortex Moutan, Radix Paeoniae Rubra and Semen Persicae)by SFE-CO2,then mix dregs with other medicinal materials,and extracted by SBE.

桂枝茯苓丸方药提取，以先将含挥发性成分的中药(桂枝、牡丹皮、赤芍、桃仁)用SFE-CO2萃取，其药渣与方中剩余的茯苓混合，再用SBE法提取为佳。

How quickly it transitions is pretty steep, so you might be able to get away with adding as little as 10Hz to your speaker's lowest reproduceable frequency. Start with 20, then tweak to preference to get the best transition.

有一个好准则就是看看你的喇叭频率响应曲线，看看他最低工作频率是多少、或者是再哪一个频率点输出音压掉到－3db ，找出这个点然后再加上20HZ 把这数值当作重低音分频点。

In line with the state educational law,regulations,policies and quality standards,seelbases itself upon education,faces the society and gives its priority to safeguard and enhance the status and reputation of seel by adhering to the principles of equity.we offer educational evaluation services at schools of all types and levels,conduct relevant the oretical resrarch and academic exchanges,and provide the government eduvational authorities with evaluation result reports and schools with every best possible service of quality to support and promote continuous improvements of educational quality and standards.

上海市教育评估院立足教育、面向社会，以质量和信誉为工作的出发点，依照国家的教育法律、法规、政策和评估标准，坚持客观公正的评估原则，开展各级各类学校教育的评估并提供相关服务，进行评估理论研究和学术交流，充分发挥其对本市教育质量政府和效益的鉴定、诊断、导向、激励等功能，为政府和教育行政部门提供有关鉴定意见和评估报告，为学校提高办学质量和效益提供优质服务。上海市教育评估院将在政府、学校和其他教育机构的支持下，依靠广大专家同仁为进一步提高上海教育质量，促进上海经济腾飞和社会发展服务。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。