The results showed as follows: 1 Extraction of gelsemium total alkaloids. Total alkaloids were extracted with 95 per cent ethanol. The extract rate was 0.519 per cent and the extract purity were 88.02 per cent and 87.38 per cent; Total alkaloids were extracted with chloroform .The extract rate was 0.416 per cent and the extract purity were 89.02 per cent and 94.52 per cent. 2 Isolation of gelsemium total alkaloids with TLC. Total alkaloids contained five or more alkaloids. The optimal developing agent was chloroform :methanol :ethyl acetate(9:l:0.3),the optimal eluent was methylene chloride:methanol(92:8). 3 Isolation of total alkaloids with column chromatography. Alkaloid A and alkaloid B were obtained, alkaloid B was identified as koumine.

研究結(jié)果如下：1国产一级黄色操逼片、鉤吻總堿的提取：用95％的乙醇提取鉤吻生物堿提取率為0.519％三级在线理论国产精品第一页，其提取物純度為88.02％韩国三级片手机免费观看、87.35％；用氯仿提取鉤吻生物堿提取率為0.416％无码理论片，其提取物純度為89.02％国产人妻在线观看、94.52％。2欧美夜A级一级一级一级、鉤吻總堿的薄層層析分離：總堿中含有5種或5種已上的生物堿毛片日韩国产；氯仿：甲醇：乙酸乙酯(9：1：0.3)是最佳薄層層析的展開劑；二氯甲烷：甲醇(92：8)是柱層析的最佳洗脫劑中文字幕第2中文字幕第二页。3ⅩXX欧美色com、鉤吻總堿的柱層析分離：共得到兩種鉤吻生物堿單體成分堿A和堿B，堿B為鉤吻素子清风阁黄色视频，堿A可能是鉤吻素甲插碰人人。4、鉤吻總堿的急性毒性試驗(yàn)：鉤吻總堿小鼠腹腔注射的半數(shù)致死量LD_(50是：7.38mg／kg亚洲国产AV无码精品无广告，95％的可信限范圍為：6.67mg／kg～7.94mg／kgwww.综合久久。

Formalin A mixture of about 40% formaldehyde, 8% methyl alcohol, and 52% water (the methyl alcohol is present to prevent polymerization of the formaldehyde). It is a powerful reducing agent and is used as a disinfectant, germicide, and fungicide and also as a general preserving solution.

福爾馬林：40﹪的甲醛、8﹪的甲醇以及52﹪的水的混合物（加甲醇目的是避免甲醛聚合）黄页视频在线学习，它是很強(qiáng)的還原物質(zhì)男人强奸裸体老女人视频，通常用作消毒、殺菌劑亚洲欧美国产丝袜一区、殺真菌劑或作為常規(guī)儲(chǔ)存液亚洲第一色色色。

The expression of spinach glycolate oxidase in pichia pastoris appeared to be induced by methanol, the molecular weight of glycolate oxidase was about 39.8kDa by SDS-PAGE and consisted with the data of literature.

甲醇誘導(dǎo)重組菌表達(dá)，并對(duì)誘導(dǎo)的條件進(jìn)行優(yōu)化欧美色一区二区，確定甲醇最適劑量為0.5%黄网站A片免费，最佳表達(dá)時(shí)間為72hr，最適溫度為28℃久操免费在线观看，最佳pH為5.5黄页观看免费在线，最佳表達(dá)菌體密度A600為0.8色视污网站大全。

The results showed that polar acetone was beneficial to the desorption of methanol, however the effect of nonpolar heptane on the extraction of methanol was more evident.

研究表明，極性溶劑丙酮能夠促進(jìn)甲醇脫附大伊人久久，而非極性溶劑正庚烷對(duì)孔道中甲醇有更強(qiáng)的萃取能力国产免费观看黄AⅤ片久久。

China mainly natural gas used in the production of nitrogen, followed by the production of methanol, formaldehyde, acetylene, methylene chloride, carbon tetrachloride, carbon disulfide, nitromethane, hydrocyanic acid and extraction of helium and carbon black. Since the 70s, has built more than natural gas and oil field associated gas as raw materials for large-scale ammonia plant, as well as a number of small and medium-sized ammonia plant, so that the national structure of the synthetic ammonia production of raw materials, natural gas share of about 30%; also be built at the same time A system of acetylene gas plant to manufacture Vinylon and vinyl acetate, acetylene gas used in the production of methanol.

中國(guó)天然氣主要用于生產(chǎn)氮肥，其次是生產(chǎn)甲醇a大乳日韩人妻无码网站、甲醛国产精品偷伦视频观看免费、乙炔、二氯甲烷欧美一区黄片、四氯化碳中国一级特黄真人高清aa大片、二硫化碳、硝基甲烷Wwwav日韩黄色毛片、氫氰酸和炭黑以及提取氦氣__级黄色视频。70年代以來，已興建多座天然氣和油田伴生氣為原料的大型合成氨廠亚洲av成人一区二区三区观看，以及一批中、小型合成氨廠一级二级三级毛片，使全國(guó)合成氨生產(chǎn)原料結(jié)構(gòu)中国产中文字幕网，天然氣所占的比例約達(dá)到30％；同時(shí)還興建了天然氣制乙炔工廠免费一级a片免费网站，以制造維尼綸和醋酸乙烯酯200avcom，乙炔尾氣用于生產(chǎn)甲醇。

Hydrogenolysis results show that the activity and selectivity of methanol produced from synthesis gas are smaller than those from pure H2.With increasing reaction temperature,the activity of methanol synthesis increases gradually,with simultaneously speeding up of side reactions.

結(jié)果表明网上可看的欧美日皮大片网站，合成氣氫解反應(yīng)活性和甲醇選擇性明顯低于純氫氫解反應(yīng)活性和甲醇選擇性日韩,欧美在线不卡片，反應(yīng)溫度高對(duì)提高催化劑活性有利，但同時(shí)也加速了副反應(yīng)的進(jìn)行亚洲中文字幕在线第一页。

The pigment in colored cotton fibers was extracted by methanol at room temperature. The results of color reactions HCl-Mg reaction, NaBH4 reaction, NaOH reaction, FeCl3 reaction and Pb(Ac2 reaction of the pigment extractive showed that the pigment extracted by methanol was flavone or flavonol with two adjacent hydroxide groups (Table 2, Fig. 1). The results of UV spectral analysis further proved that the pigment extracted by methanol from brown fiber belonged to flavone with two adjacent hydroxide groups in B ring, and that from the green fiber contained not only flavone but also flavonols with two adjacent hydroxide groups both in A ring and B ring and indican replaced a hydroxide group at 3-site of A ring Fig.

通過鹽酸－鎂粉反應(yīng)欧美黑人巨大激情视频、四氫硼鈉還原反應(yīng)、堿反應(yīng)欧美系列一级二级在线观看、醋酸鉛反應(yīng)欧美三级自拍视频、氯化鐵反應(yīng)和紫外光譜吸收的分析表明，甲醇室溫提取的棕色棉纖維色素可能是黃酮類化合物色色色色色色色色片视频，B環(huán)上帶有鄰二酚羥基国产丝袜熟女视频一区；甲醇室溫提取的綠色棉纖維色素除黃酮類化合物外，還含有3-位羥基被糖甙化的黃酮醇類化合物山东一级黄色大片，A久久综合网天天桃花网、B環(huán)上都帶有鄰二酚羥基。

The experimental results showed that: the adsorption of methanol and isobutylene conform to Elovich equation. The adsorption quantity of methanol was bigger than that of isobutylene, but the adsorption rate was slower.

采用過渡應(yīng)答技術(shù)對(duì)甲醇和異丁烯在改性b分子篩上的吸附行為進(jìn)行了研究色色色资源，研究結(jié)果表明：異丁烯和甲醇在改性b分子篩上符合先快吸附后慢吸附的Elovich吸附規(guī)律性香港XXXXX免费视频播放。

The behaviors of methanol and isobutylene adsorbed over a modified-b zeolite catalyst were studied by the transient response method in a chromatogram-reactor. The experimental results showed that: the adsorption of methanol and isobutylene conform to Elovich equation.

摘 要：采用過渡應(yīng)答技術(shù)對(duì)甲醇和異丁烯在改性b分子篩上的吸附行為進(jìn)行了研究免费真实处破视频在线观看，研究結(jié)果表明：異丁烯和甲醇在改性b分子篩上符合先快吸附后慢吸附的Elovich吸附規(guī)律。

Systematic isopiestic measurements have been made at the temperature 298.15K for the quaternary system {water (A1)+methanol (A2)+sodium bromide + ammonium bromide} with the mass ratios of water: methanol=9∶1 and 4∶1 and for the quinary system {water (A1)+methanol (A2)+ethanol (A3)+sodium bromide +ammonium bromide} with the mass ratios of water: methanol: ethanol=18∶1∶1 and 8∶1∶1, which were the first isopiestic determining examples for mixed solvent systems.

本文系統(tǒng)地測(cè)定了298.15K時(shí)混合溶劑各組元質(zhì)量比為w〓∶w〓＝9∶1和4∶1的四元系{H〓O+甲醇(A2)+NaBr+NH〓Br}和w〓∶w〓∶w〓＝18∶1∶1和8∶1∶1的五元系{H〓O(A1)+甲醇(A2)+乙醇(A3)+NaBr+NH〓Br}的等壓平衡日韩自拍中文在线视频观看，是混合溶劑體系等壓性數(shù)據(jù)的首例欧美黄色视频第一次。