High-performance liquid chromatography coupled with an ultraviolet detector was used to quantitatively determine the amount of caffeoylquinic acid, arctium lappa glycoside, aurantiamarin and forsythin present in five solvent extracts (water, 30% ethanol, 50% ethanol, 70% ethanol and 95% ethanol) of Yinqiaosan.

采用高效液相色譜法同時(shí)測定不同提取溶劑（水提欧美国产日韩另类综合在线、30%醇提99热在线精品播放、50%醇提国产精品区在线、70%醇提久久久久久久精品九精品、95%醇提）下銀翹散中綠原酸、橙皮苷97国产精品免费视频、牛蒡苷和連翹苷四種有效成分的含量国产嫖娼妓院视频网站。

Due to the ability of the bivalent magnesium cation to form stable chelate complexes with carbonyl compounds,magnesium methylate for example is used as a selective carbonyl condensing agent. Three synthesis routes was proposed based on literatures and comprehensive comparison with other ways. First,Magnesium methylate is prepared by reacting magnesium metal with dry methanol.The magnesium salts of"higher"primary alcohols,i.e.alcohols with ≥ 2 carbon atoms,do not react directly with pure alcohols under normal conditions.In fact catalysts are required to set the reaction in motion and the preparation is performed under pressure at the higher temperatures.

一、直接合成法：本文將鎂與無水甲醇直接反應(yīng)制得甲醇鎂男女爱爱免费超爽大片黄；"更高級(jí)"的醇（比如C≥ 2的醇）在無催化劑的條件下無法直接和鎂進(jìn)行反應(yīng)亚洲视频二区三区，本文以CCl4為催化劑將無水乙醇與鎂直接反應(yīng)制得乙醇鎂，但是以原甲酸三乙酯為催化劑無水乙醇與鎂無法反應(yīng)91av色片在线；不論是以CCl4為催化劑還是以原甲酸三乙酯為催化劑亚洲激情黄色视频，丙醇均無法與鎂直接反應(yīng)。

Due to the ability of the bivalent magnesium cation to form stable chelate complexes with carbonyl compounds,magnesium methylate for example is used as a selective carbonyl condensing agent.Three synthesis routes was proposed based on literatures and comprehensive comparison with other ways.First,Magnesium methylate is prepared by reacting magnesium metal with dry methanol.The magnesium salts of higherprimary alcohols,i.e.alcohols with ≥ 2 carbon atoms,do not react directly with pure alcohols under normal conditions.In fact catalysts are required to set the reaction in motion and the preparation is performed under pressure at the higher temperatures.

一亚洲第一区色色色、直接合成法：本文將鎂與無水甲醇直接反應(yīng)制得甲醇鎂插抽视频；"更高級(jí)"的醇(比如C≥2的醇)在無催化劑的條件下無法直接和鎂進(jìn)行反應(yīng)，本文以CCl_4為催化劑將無水乙醇與鎂直接反應(yīng)制得乙醇鎂一级AAA毛片无码视频，但是以原甲酸三乙酯為催化劑無水乙醇與鎂無法反應(yīng)污污黄色美女视频网站；不論是以CCl_4為催化劑還是以原甲酸三乙酯為催化劑，丙醇均無法與鎂直接反應(yīng)欧美性爱大屁股。

As the results, both the friction and wear are much lower in n-monohydric alcohols than in water; in ethanol, the friction and wear increase rapidly when a small amount of water was blended into the lubricant; the friction and wear decrease slightly with increasing the chain length in n-alcohols; in polyhydric alcohols, the increase of the hydroxyl number greatly reduces the friction and wear.

研究結(jié)果表明国产女人网站，陶瓷在醇中的摩擦和磨損均比水中低；在乙醇中加入少量水可明顯增大其摩擦和磨損欧美日韩精品综合；隨著一元醇分子鏈長的增加欧美国产美女性爱在线，其摩擦磨損略有降低；多元醇中羥基數(shù)目越多久久久久国产一级毛片高清版，其摩擦磨損越低直接观看的黄色网页。

Differential Scanning Calorimetry and Small Angle X-ray Diffractometry were used to characterize the phase transitions in lamellar liquid crystal systems containing water, alkyl polysorbates, sorbitan esters, stearyl alcohol and oil. The order-disorder transition temperatures of the gelled O/W and W/O globular onion lamellar phases L(subscript O1) and L(subscript O2) and planar gelled lamellar phase L(subscript β) were measured as a function of system compositions.

采用示差掃描量熱法和小角X射線衍射測試技術(shù)表征了由聚氧乙烯醚失水山梨糖醇脂肪酸酯、失水山梨糖醇脂肪酸酯AAA黄色视频免费看、直鏈脂肪醇和揮發(fā)性物質(zhì)組成的層狀液晶體系的相轉(zhuǎn)變特性国产乱子伦视频大全，測定了水包油和油包水球形洋蔥層狀液晶L(下標(biāo) O1)和L(下標(biāo) O2)及平面層狀液晶L的有序－無序的轉(zhuǎn)變溫度與體系組成之間的關(guān)系欧插网免费看的视频。

It is prepared from titanium tetrachloride carried on an alcohol carrier that Mg and Li chlorides with molar ratio of 1:(2-20) are dissolved in alcohol, and by: co-dissolving Mg chloride and Li chloride in a low carbon alcohol and stirring at high speed in an inert medium to form micro-particles; reacting the said alcohol with titanium tetrachloride twice, adding organic acid polyester at first time, washing out uncarried titanium tetrachloride, and drying to obtain powdery pruduct.

它是由四氯化鈦負(fù)載于將氯化鎂和氯化鋰共溶于醇形成的醇合物載體上組成，其中氯化鋰與氯化鎂的摩爾比為1∶2～1∶20国产露出网站。這種主催化劑組分的制備有兩個(gè)步驟：(1)無水氯化鎂和氯化鋰共溶于低碳醇中形成醇合物，并在惰性介質(zhì)中高速攪拌形成醇合物微粒日韩欧美午夜性爱福利；(2)醇合物與四氯化鈦進(jìn)行兩次反應(yīng)欧美一级视频网站，其中第一次反應(yīng)時(shí)加入有機(jī)酸多元酯。反應(yīng)結(jié)束后用惰性溶劑洗去未負(fù)載的四氯化鈦91在线精品网址，干燥后得到呈粉末狀的主催化劑組分国产91九色视频。

Their technology and process is basically similar to that used ethylene, the raw material for the oxygen in the silver catalyst, caused by methane or nitrogen stabilizer, the existence of inhibitors of chloride, ethylene oxide directly generate ethylene oxide and ethylene B N and further to certain substances in water than in the tubular reactor for generating hydration ethylene glycol, ethylene glycol solution through evaporation to mention thick, dehydration, fractionation be ethylene glycol and other by-products.

它們的工藝技術(shù)和工藝流程基本上相似，即采用乙烯国产性交A级视频、氧氣為原料久久r久久，在銀催化劑、甲烷或氮?dú)庵路€(wěn)劑国产AV。、氯化物抑制劑存在下影音先锋每日最新AV资源久久，乙烯直接氧化生成環(huán)氧乙烷，環(huán)氧乙烷進(jìn)一步與水以一定物質(zhì)的量比在管式反應(yīng)器內(nèi)進(jìn)行水合反應(yīng)生成乙二醇精品久久亚洲一区二区欧美，乙二醇溶液經(jīng)蒸發(fā)提濃www.自拍偷拍.com、脫水、分餾得到乙二醇及其他副產(chǎn)品jiujiuse在线。

Result］High concentration of leachates had significant inhibitory effects,but low concentration of leachates had no obvious effects in the initial stage and later stage after treatment.Low concentration of alcohol leaching liquor might had stimulating effects on SOD active.Water leaching liquor had no obvious effects,but higher concentration of alcohol leaching liquor had significant inhibitory effects on root vigor.

結(jié)果］在油松針葉水提液和醇提液處理后的初期（10 d）和后期（30 d）的抑制作用僅在高濃度處理日韩精品15P；低濃度醇提液對草坪草'搶手股'SOD活性可能有促進(jìn)作用；水提液對根系活力沒有明顯的影響亚洲无码操B视频，較高濃度的醇提液對根系活力有明顯的抑制作用久久精品国产96久久久。

In contrast, Al2TiO5 can not be synthesized at low temperatures using methanol or tert-butyl alcohol as oxygen donor due to their high chemical reactivity resulting in hydrolysis reaction.

以TiCl4和無水AlCl3為原料，以無水低碳醇為氧供體通過非水解溶膠-凝膠法低溫合成了鈦酸鋁免费毛片入口，研究了無水低碳醇種類及用量對鈦酸鋁合成反應(yīng)的影響一级黄色网一级黄色网站。

While the pH values of the buffer solution were 65.06.78.2 and 10.2, the apparent octanol/water distr...

結(jié)論苦參素易溶于水和氯仿。pH對苦參素表觀正辛醇-水分配系數(shù)有一定影響5060av，在一定范圍內(nèi)色哟呦在线播放，pH值增加可使苦參素的表觀正辛醇-水分配系數(shù)增大。