查询词典 methanol

Catalytic Synthesis of Methyl Furoate by Peroxhydrogen and Sulphate Acid;2. Using hydrochloric acid as a cheap catalyst,perfume methyl furoate was synthesized from methanol and furoic acid prepared from furfural,and was characterized by GC,IR and 1H-NMR.

从糠醛出发，由制备的糠酸和甲醇反应，在盐酸催化下，合成了香料糠酸甲酯，并用IR、1HNMR、GC等进行了表征；探讨了包括高纯度糠酸的制备在内的反应影响因素，在醇酸物质的量之比为 5∶1、催化剂体积占甲醇体积 13。

Using hydrochloric acid as a cheap catalyst,perfume methyl furoate was synthesized from methanol and furoic acid prepared from furfural,and was characterized by GC,IR and 1H-NMR.

从糠醛出发，由制备的糠酸和甲醇反应，在盐酸催化下，合成了香料糠酸甲酯，并用IR、1HNMR、GC等进行了表征；探讨了包括高纯度糠酸的制备在内的反应影响因素，在醇酸物质的量之比为 5∶1、催化剂体积占甲醇体积 13.0 %、反应时间 3h的最佳工艺条件下，酯化收率为81 0 %，收率比硫酸法、某些固体超强酸法

The growth of H. fusiformis was determined by weighting the fresh algae every two days and the photosynthetic oxygen evolution was assayed by a Clark-type oxygen electrode. To determine the contents of chlorophyll a and UV-absorbing compounds, methanol extracts from H. fusiformis were scanned from 250 to 750 nm. The concentration of chlorophyll a was calculated using the equation of Porra and the contents of UVAC per fresh mass were estimated by determining the ratio of UVAC to chlorophyll a according to Dunlap et al and multiplying the ratio of chlorophyll a content to fresh weight of the sample used.

羊栖菜的生长是通过每两天测量一次藻体的湿重来测定的，光合放氧是用Clark型氧电极测定的，为了测定藻体叶绿素a和紫外吸收物质的含量，从250 nm到750 nm对羊栖菜的甲醇提取液进行扫描，叶绿素a的浓度用Porra的公式计算，紫外吸收物质的计算是根据Dunlap的方法先计算紫外吸收物质和叶绿素a的比率，然后乘以每单位藻体叶绿素a的含量。

The comparison studies on gossypol of different genetic types of pigment gland in the seeds of cotton newly bred, including the special and common glandless and glanded ones, was conducted through highperformance liquid chromatography on a C18 Column with methanol 0.5% acetic acid aqueous solution, 90∶10 as mobile phase at a flow rate of 0.8mL·min-1 and UV detection at 254 nm.

运用高效液相方法对新近育成的特殊和普通的无腺体陆地棉及特殊和普通的有腺体陆地棉及海岛棉等多种遗传类型品种材料的棉酚含量进行了比较研究。实验以一反向C18色谱柱为固定相，甲醇 0.5%的醋酸90∶10为流动相，流速为0.8mL·min-1，建立了分离度好、准确而快速的棉酚HPLC测定方法：其最低检测限量3×10-6g/mL-1，精密度和准确度均小于10%，回收率为100.4%～103.2%。

Alkyl substituted imidazoles were synthesized by reaction of alkyl amines with glyoxal, formaldehyde and ammonia in methanol.

在对环境保护和资源的可持续利用倍受关注的今天，绿色化学是化学发展的必然趋势。

Is located in Yellow River Delta, located in West Liuqiao Guangrao County Economic Development Zone, the brink of East Green high-speed, convenient transportation and strategic location, covers an area of 350,000 square meters, is a professional Companies are now built with an annual output of 3,000 tons glyoxylic acid, Allantoin 300 tons, 5,000 tons of sodium methanol, ethanol production of 5,000 tons of sodium scale.

广饶县弘达精细化工有限责任公司座落于黄河三角洲，位于广饶县西刘桥经济开发区，濒临东青高速，交通便利，地理位置优越，占地面积达350000平方米，是一家专业化公司，现已建成年产乙醛酸3000吨、尿囊素300吨、甲醇钠5000吨、乙醇钠5000吨的生产规模。

Glyoxylic acid was prepared by reaction of sodium hydroxide surplus with methyl dichloroacetate in methanol solution via neutralization of filtrate with 50 percentage sulfuric acid to pH 2～3 and hydrolyzation after separation of salts.

二氯乙酸甲酯和过量的氢氧化钠在甲醇溶液中反应，滤出氯化钠后，直接加入适量的 5 0 %的硫酸调 pH值为 2～ 3，滤出硫酸钠，蒸馏回收甲醇，水解、浓缩，得到不含乙二醛的 4 0 %乙醛酸溶液。

Ten batches of Cortex Moutan Carbonisatum were measured by HPLC with Paeonol as a reference substance and the HPLC analysis was performed on a Hedera ODS-3 Chromatographic Column(4.6 mm×150 mm,5 μm),with methanol to Acetonitrile(1∶1) and 0.5‰ trifluoroacetic acid solution as mobile phase in gradie...

以丹皮酚为参照物，对10批丹皮炭进行指纹图谱的分析。结果：建立了丹皮炭饮片的HPLC指纹图谱共有模式，标定了11个共有峰，10批炭品的相似度在0.830~0.991。结论：该指纹图谱方法简便、准确、重复性好，可专属性地研究丹皮炭的指纹图谱，为有效地控制该饮片的内在质量提供了科学依据。

Ten batches of Cortex Moutan Carbonisatum were measured by HPLC with Paeonol as a reference substance and the HPLC analysis was performed on a Hedera ODS-3 Chromatographic Column (4.6 mm×150 mm, 5 μm), with methanol to Acetonitrile (1∶1) and 0.5‰ trifluoroacetic acid solution as mobile phase in gradient mode and the detection wavelength was at 258 nm.

采用Hedera ODS-3柱(4.6 mm×150 mm，5 μm)，流动相甲醇-乙腈(1∶1)-0.5‰三氟乙酸水，梯度洗脱，检测波长258 nm。

By adopting the method of stepwise synthesis, this paper synthetizes 1,3 - diaminopropanein 2-Hydroxy-3-methoxybenzaldehyde Zn-Sm heteronuclear bimetallic in Anhydrous methanol solution.

6楼本文采用分步合成的方法，在无水甲醇溶液中合成了1，3-丙二胺缩邻香兰素Zn-Sm异核双金属配合物。

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。