With common pakchoi as the material, they were soaked in mixed solution with 1000 times of methyl parathion, dimethoate, dichlorvos, pyralid treat phosphorus, poison-to-death barnyard grass and fenvalerate for 1 min, and then they were saved in CW(25℃, humidity 55%RH), LC(4 ℃, humidity 60%RH) and DW (-24 ℃, humidity 70%RH) after air dried. After saved for 0, 24, 48 and 72 h, the samples from which were taken to determine the residual quantity of pesticides in pakchoi of different treatments.

方法］以普通小白菜為材料欧美精品一二三四区0，將其在1000倍甲基對(duì)硫磷粗壮公每次进入让我次次高潮、樂(lè)果国产精品美女人人做人人爽、敵敵畏婷婷丁香五月一区二区三区、治螟磷性欧美在线视频免费、毒死稗和氰戊菊酯的混合稀釋液中浸泡1 min午夜免费A级毛片试看，取出晾干后分別在CW（25℃，濕度55%RH）中文自拍日韩在线视频网、LC（4℃99久久久免费毛片，濕度60%RH）和DW(-24℃、70%RH)條件下保存人人草人人艹，0欧美cao、24、48黄色视频免费观看网页、72 h后分別取樣在线人成免费视频，測(cè)定各處理小白菜中農(nóng)藥的殘留量。

Methods: A Diamonsil C18 column was used with the mobile phase of 0.1% ammonium acetate solution-methanol (10:90) at the detection wavelength of 240 nm. The flow rate was 1.0 mL/min. Benzyl benzoate was used as internal standard.

采用Diamonsil C18柱美国精品偷拍网，流動(dòng)相為0.1%乙酸銨溶液：甲醇(10：90)史上最婬荡野视频高潮，流速1.0 mL/min，檢測(cè)波長(zhǎng)240 nm小黄片无码视频，以苯甲酸芐酯為內(nèi)標(biāo)午夜乱伦网。

The HPLC finger print of TGDGBX was set up by HPLC-DAD: the chromatographic column,Diamonsil C18(250 mm×4.6 mm, 5μm, 30℃)and bidimensional gradient elution using methyl cyanide-water (flowing speed 1.0 mL·min-1,λ=203 nm). 180 Wistar rats were randomly divided into normal control group, model group, cortisone group, and TGDGBX (16,32 and 64 mg·kg-1) groups respectively.

采用HPLC-DAD，Diamonsil C18色譜柱(250 mm×4.6 mm国产视频色色色， 5μm)性爱视频网站日本，乙腈―水二元梯度洗脫，流速1.0 mL·min-1色色色综合五月天，(λ=203 nm)久久久国产99精品一国产，柱溫為30℃，建立了當(dāng)歸補(bǔ)血總苷的HPLC指紋圖譜干逼视频。180只Wistar大鼠隨機(jī)分為正常對(duì)照組无码视频A片免费看无、模型對(duì)照組、強(qiáng)的松組和當(dāng)歸補(bǔ)血總苷大99久久国产亚洲精品观看、中天堂网综合网、小劑量組，每組30只91三级片在线。

The Michaelis-Menten constant of xylanases in the enzymatic hydrolysis of birchwood xylan is 5.37g/L, and the maximal reaction velocity is 0.94μmol/min.

該木聚糖酶作用于Birchwood木聚糖的米氏常數(shù)為5.37g/L日韩免费午夜毛片视频在线播放，最大反應(yīng)速率為0.94μmol/min。

The results showed that the liquid medium supplemented with sucrose 150 g· L-1+ 20 mg·L-1 boracic acid + 30 mg· L-1 chloridize calcic and TTC and the dyeing time of 30～35 min were suitable for the pollen germination.

結(jié)果表明：金娃娃萱草花粉萌發(fā)的適宜液體培養(yǎng)基為蔗糖150 g.L-1+硼酸20 mg.L-1+氯化鈣30 mg.L-1自拍偷拍25页；適宜的染色劑為T(mén)TC狠狠cao2020高清视频，染色時(shí)間為30~35 min。

Ultra-clean air flow rate of 24 ~ 30m/min, which are adequate to prevent possible harassment in the vicinity of air pollution caused by such a flow will not impede the use of alcohol lamp or Bunsen burner burning disinfection of equipment and so on.

超凈空氣的流速為24～30m/min密黄片啪啪啪，這已足夠防止附近空氣可能襲擾而引起的污染欧美丝袜精品久久中文字幕，這樣的流速也不會(huì)妨礙采用酒精燈或本生燈對(duì)器械等的灼燒消毒。

The effects of acidity, reaction temperature, feeding mode, and rotational speed of the stirrer on the particle size of AC blowing agent were studied. The optimal conditions were obtained as follows: the catalyst composed with m:m(V2O5)=1:1 equal to 1%-2% ratio of the reagent''s mass,reagent reacts at 50℃ under pH=3-4 for 25min with 350～360r/min of the stirrer speed, and the NaClO3 solution must be added from burette.

研究了酸度人人操人人爱一区二区、反應(yīng)溫度黄色免费免费在线好看、加料方式啪啪啪小视频免费看、攪拌器的轉(zhuǎn)速對(duì)AC發(fā)泡劑粒徑的影響，最佳工藝條件為：催化劑m：m(V2O5)=1：1的質(zhì)量約為反應(yīng)物質(zhì)量的1%~2%天天日天天干天天色，反應(yīng)體系的pH值3～4三级片黄色欧美性爱视频，反應(yīng)溫度控制在50℃左右，氯酸鈉溶液(質(zhì)量分?jǐn)?shù)20%)采用通管滴加的方法加入偷怕视频区永久入口在线观看，整個(gè)反應(yīng)時(shí)間約為25min，攪拌器的轉(zhuǎn)速一般控制在350～360r/min亚洲视频热热。

The quantity of catalyst was equal to 0.6% of feedstocks,the reaction temperature was 78～110 ℃,and the reaction time was 45 min. The test results have shown that H_4SiW_(12-O_(40)/MCM-48 is an excellent catalyst for synthesizing butanone 1,2-propanediol ketal with its yield reaching over 91.9%.

實(shí)驗(yàn)表明：H4SiW12O40/MCM-48是合成丁酮-1五月天色色香蕉，2-丙二醇縮酮的良好催化劑，在n∶n(1久久黄色视频看一下，2-丙二醇)=1∶1.6欧美久久久久，催化劑用量為反應(yīng)物料總質(zhì)量的0.6%，環(huán)己烷為帶水劑717欧美论理电影，反應(yīng)時(shí)間45 min的優(yōu)化條件下九九在线免费视频，丁酮-1，2-丙二醇縮酮的收率可達(dá)91.9%国产乱伦合集。

The optimum conditions were determined as follows:the molar ratio of butyraldehyde to glycol was 1∶1.6,the mass ratio of catalyst to reactants was 0.4%,the volume of cyclohexane as the water-carrying agent was 10 mL,and the reaction time was 60 min.

結(jié)果表明国产精品女A片爽爽免费视频下载，磷鎢鉬雜多酸對(duì)合成丁醛乙二醇縮醛有較好的催化活性，適宜的反應(yīng)條件如下：n∶n=1∶1.6国产怕怕、催化劑用量為反應(yīng)物料總質(zhì)量的0.4%一区精品在线、帶水劑環(huán)己烷用量為10 mL、反應(yīng)時(shí)間為60 min欧美特黄A级高清免费大片A片l。

When pH is 10, adsorption time is 30 min, dosage of bone char is 0.6 g/L, the original concentration of As in drinking water is 0.5 mg/L, As removal can reach 95.2%. The adsorption behavior is fitted both with Langmuir and Freundlich isotherm. The adsorption mechanism is supposed to be Ca—OH functional groups combined with anion. And there may occur the co-precipitation between calcium hydrogen arsenate and hydroxylapatite in the aqueous solution, and ions also exchange. The saturation adsorption capacity of As reaches 4.688 mg/g. Indexes of effluent are in good agreement with the WHO stringent drinking water standards (0.01 mg/L).

研究結(jié)果表明：在pH=10色网站国产在线，吸附時(shí)間為30 min和骨炭加入量為0.6 g/L，飲用水砷初始質(zhì)量濃度為0.5 mg/L時(shí)其砷去除率可達(dá)95.2%亚洲福利小视频；骨炭吸附砷的行為同時(shí)符合Langmuir和Freundlich等溫吸附模型久草视频在线草；其吸附機(jī)理可能是Ca—OH官能團(tuán)結(jié)合HASO4陰離子，并產(chǎn)生砷酸氫鈣和羥基磷灰石的共沉淀黄页网站免费49vvcom，另外還存在離子交換作用又爽又粗又大一级A片；吸附柱的飽和吸附容量為4.688 mg/g；出水砷濃度符合世界衛(wèi)生組織規(guī)定飲水砷標(biāo)準(zhǔn)(0.01 mg/L)国产无码专区视频。