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冰醋酸

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Acenaphthenone was prepared by the oxidation of acenaphthene in the presence of chromic anhydride , acetic acid and polyethylene glycol as a phase transfer catalyst under mild reaction conditions with high yields.

研究了在铬酸酐、冰醋酸和相转移催化剂聚乙二醇存在下苊的氧化反应,较温和的条件可高产率地得到苊酮。

5 % vanillin acetum and perchloric acid as color developer, the content of ursolic acid of kudingcha growed in Hainan province was determined at 548 nm.

用5%香草醛冰醋酸及高氯酸显色,在波长548nm处用分光光度法测定了海南苦丁茶中的熊果酸含量。

The mobile phase was a mixture of acetonitrile 0.378 mol/L acetum (30∶70) and in a flow rate of 0.8 mL/min; The detective wavelength was 321 nm; Column temperature was room temperature and the injection quantity was 10 μ L.

色谱柱 Lichrospher C 18 (4.6 mm ×250 mm,5 μm),C 18 保护柱;流动相:乙腈 0.378 mol/L冰醋酸水溶液(30∶70);检测波长321 nm;流速0.8 mL/min;柱温:室温;进样量10 μL。

After acidify with hydrochloric acid, the plasma was extracted with ethyl ether and then analyzed by Hypersil ODS2 (250×4.6 mm,5 μm) column with the mobile phase of methanol-water-triethylamine-acetic acid(2500∶1500∶15∶7), and at the detection wavelength of 355 nm.

血样经盐酸酸化后以乙醚提取,进行 HPL C分析,色谱柱为 Hypersil ODS2 (2 5 0× 4.6 m m,5 μm),流动相为甲醇-水-三乙胺-冰醋酸(2 5 0 0∶15 0 0∶ 15∶ 7)检测波长为 35 5 nm,尼美舒利为内标。

The aliquot was determined and confirmed by gas chromatography-negative chemical ionization mass spectrometry using external standard method.

样品中三唑醇残留物由正己烷饱和的乙腈(含1%冰醋酸)提取,加入无水硫酸镁与无水醋酸钠振荡促使提取液分层后进行固相分散萃取净化,用气相色谱-负化学离子源质谱法进行测定与确证,外标法定量。

The linear ranges were 14.0 ̄140 μg/ml( r = 0.9998 ) for caffeine; 27.0 ̄270.0 μg/ml ( r = 0.9998 )for antipyrine; 0.1 ̄1.0 mg/ml ( r =0.9999) for sodium salicylate.

色谱条件为:KromasilC18色谱柱,流动相为20mmol/L磷酸二氢钾-甲醇-冰醋酸(55250.4),流速1ml/min,检测波长为242nm,线性范围:咖啡因14.0~140.0μg/ml,r=0.9998;安替比林27.0~270.0μg/ml,r=0.9998;水杨酸钠0.1~1.0mg/ml,r=0.9999。

Aureomycin on reduction with zinc-acetic acid gives desdimethylaminoaureomycin under mild conditions and desdimethylaminodesoxyaureomycin under more drastic conditions.

金霉素在冰醋酸与甲醇溶液中,用锌粉氢解,在温和条件下,产生脱二甲胺金霉素;较剧烈条件下,则生成脱二甲胺脱羟金霉素。

China,calcium carbide, acetic acid,vinyl acetate,pentaerythrite,polyvinyl butyral resin,polyvinyl butyral film,"AVS"paint for interior and exterior walls,cement,carbonized bricks etc,over 40 chemicals and building materials.

主要有聚乙烯醇系列产品、聚乙酸乙烯酯乳液系列产品、电石、冰醋酸、醋酸乙烯、季戊四醇、聚乙烯醇缩丁醛树脂、聚乙烯醇缩丁醛胶片、AVS内外墙涂料、水泥、碳化砖等40多种化工产品和建材产品。

They were fed with medicine intragastrically. The earlap inflammation caused by bimethylbenzene, the effect on pain induced glacial acetic-acid, the influence on the penetrability of capillary vellset in the abdominal cacity and the weight of rat cotton-ball granuloma were observed. 2.Acute toxicity test: Twenty mice were fed with the rhinitis capsule solution of most concentration and volume by intragastrically. All the actions and the appearance of major organs were observed in twenty-four hours and one week.

分别灌胃给药,观察该药对小鼠二甲苯性耳壳炎症、冰醋酸致痛作用及冰醋酸致腹腔毛细血管通透性增高和大鼠棉球肉芽肿的影响。2、急性毒性实验:20只小鼠灌胃给以最大浓度和最大剂量鼻炎胶囊溶液,用药24小时和1周后观察动物的一切活动及各主要脏器的外观形态。

To be different from the already chloromethylation catalyst, it has a certain amount of moisture wet, which will not produce huge amounts of doughtic cancerogenic chloromethyl methyl ether during and after the reaction.4,4\'-bisbiphenyl, 1,4-bisbenzene, 1,4-bis(chloro- methyl)-2,5-dimethylbenzene, 1,5-bis-2,4-dimethylbenzene, 4-(chlor- omethyl)-1,2-dimethylbenzene, 1,2-bis-4,5-dimethylbenzene, 5,8-bis-1,2,3,4-tetrahydronaphthalene, 3,3\',5-tris-4,4\'-bisbiphenyl and 3,3\', 5,5\'-tetrakis-4,4\'-bisbiphenyl were synth- esized by using this new catalyst. Results indicated that when the reaction temperature was 55~60℃, the reaction time was 12h, the catalyst which consists of the concentration of 80%H_2SO_4, HAc and Lewis acid, the amount of Lewis acid 0.15 mol(nLewis:nbiphenyl=1.5:1), yield of biphenyl chloromethylation product 4,4\'-bis(chrolomethylbiphenyl can reach a maximum 85%.

采用这种催化体系完成了4,4′-二氯甲基联苯、对二氯甲基苯、1,4-二氯甲基-2,5-二甲基苯、1,5-二氯甲基-2,4-二甲基苯、4-氯甲基-1,2-二甲基苯、1,2-二氯甲基-4,5-二甲基苯、5,8-二氯甲基-四氢萘、3,3',5-三氯甲基-4,4'-二甲基苯和3,3',5,5'-四氯甲基-4,4'-二甲基苯的合成,结果表明:在反应条件为:反应温度55~60℃,反应时间12h,选择80%H_2SO_4、冰醋酸和Lewis酸为催化剂,反应最佳反应Lewis酸用量是0.15mol(和原料比为1.5:1),反应效果最好,联苯氯甲基化产物(4,4′-二氯甲基联苯)收率为85%;在反应条件为:反应温度70℃,反应时间8h,80%H_2SO_4、冰醋酸和Lewis酸为催化剂,反应最佳反应Lewis酸用量是0.1mol(和原料比为1:1)时,反应效果最好,苯的氯甲基化产物收(来源:ABd0C论文eded网www.abclunwen.com)率为75%;在反应条件为:在反应条件为:反应温度40℃,反应时间10h,60%H_2SO_4和Lewis酸为催化剂,反应最佳反应Lewis酸用量是0.1mol(和原料比为1:1)时,反应效果最好,对二甲苯氯甲基化产物(1,4-二氯甲基-2,5-二甲基苯)收率为78.5%;在反应条件为:反应温度35℃,反应时间10h,60%H_2SO_4、冰醋酸和Lewis酸为催化剂,反应最佳反应Lewis酸用量是0.1mol(和原料比为1:1)时,反应效果最好,间二甲苯氯甲基化产物(1,5-二氯甲基-2,4-二甲基苯)收率为81.5%。

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