It's found that the aromatic dinitro compounds can be monoreduced to nitroanilines in high selectivity, aromatic nitro compounds and muti-cycle aromatic nitro compounds can be quantitively reduced to the corresponding amine by selenium catalyst with CO/H2O in polar aprotic solvents under atmospheric pressure using medical inorganic bases as co-catalysts.

在實驗的基礎(chǔ)上提出了對硒催化CO/H_2O還原芳香硝基化合物機(jī)理的一些粗淺認(rèn)識。

As an artificial enzyme, it can be optimized by changing the diphenylmethane units or bridging chains or by chemical modification of hydrophobic cavities to form new host compounds. Different host compounds can recognize different guest compounds to become an supramolecular system.

不同的主體化合物能俘獲不同種類的客體分子久久无码午夜体验区，與客體形成超分子體系无遮挡裸体免费视频麻豆，對不同反應(yīng)底物進(jìn)行絡(luò)合和催化，達(dá)到有選擇性地控制反應(yīng)色人妻综合，提高反應(yīng)速率91精品视频在线观看免费视频，模擬酶促反應(yīng)和分子識別的目的自拍超碰。

Preliminary antitumor activity in vitro of the new compounds indicated that the compounds have obvious inhibitory effect on human leukaemia cell (HL-60) and human galactophore cancer cell (MDA-MB-468) in the concentration of 10-4 mol/L. This result is a basis for further study on the synthesis and biological activity of this kind of compounds.

對所合成的10個新化合物進(jìn)行了抗腫瘤體外生物活性試驗，初步生物活性實驗結(jié)果表明国产美女一级视频，該類化合物在濃度為10-4 mol/L時對人白血病細(xì)胞株(HL-60)和人乳腺癌細(xì)胞株(MDA-MB-468)有明顯的抑制作用又去三级免费，在濃度為10-5 mol/L時沒有明顯的抑制作用，這一研究結(jié)果為進(jìn)一步研究此類化合物的合成黄色视频啪啪一区、生物活性的研究奠定了基礎(chǔ)一级视频片免费播放。

We select pharmacodynamics index, establish animal model, and carve availability group according to pharmacological experiments. And draw a conclusion that the 60%EtOH extr. is availability group. In this group, 15 compounds have been isolated, 13 are identified, 6 are the first isolation from Galium verum L., 2 are the compounds that no document reports. Most of the compounds are flavonoids, others are organic acid and anthraquinone.

本課題首先選取治療下肢靜脈炎相關(guān)的藥效學(xué)指標(biāo)，建立動物模型一级作爱免费视频在线观看，在藥理學(xué)實驗的基礎(chǔ)上另类自拍日韩在线视频观看，確立大孔樹脂60％乙醇洗脫部位為有效部位国产538黄色网站在线观看，繼而對該部位進(jìn)行進(jìn)一步的化學(xué)研究夜间福利av，分離出單體化合物15個，鑒定結(jié)構(gòu)13個在线观看91精品亚洲一区，其中有6個是從蓬子菜中首次分離得到久久精品国精品亚州，有2個化合物是國內(nèi)外文獻(xiàn)中未見報道的化合物，結(jié)構(gòu)鑒定工作正在進(jìn)行中九九免费看大片视频黄色的。

The results of biological test showed that some of these compounds had good fungicidal activity. The inhibition rate of most compounds to Botrytis cinerea Pers and Gibberella zeae coud reach 50% at the concentration of 50 mg/L. The inhibition rate of two compounds to Botrytis cinereapers were 85%.

同時對6種病原菌進(jìn)行了生物活性測試com.一区二区久久特，結(jié)果表明：在50 mg/L質(zhì)量濃度下，大部分化合物對黃瓜灰霉病菌和小麥赤霉病菌抑制效果較好丰满的人妻一级毛片，抑制率達(dá)50%以上四虎4hutv最新884a，且優(yōu)于對照商品醚菌酯；特別是Ⅱhwww黄色视频在线免费、Ⅱi化合物對黃瓜灰霉病菌抑制率達(dá)85%欧美性爱网三级。

The experiments show that one portion of amino organic compounds in the shell is changed to the volatilizable amine and the other portion is transformed to the involatile nitrate after pyrogenation.The organic compounds disappear completely at 600℃.They also show that the aragonite phase of calcium carbonate in pearl shell chang with temperature;the aragonite phase transforms to calcite at 500℃, but some of organic compounds is still residual;and calcium carbonate begins to decompose to calcium oxide at 600℃.

實驗發(fā)現(xiàn)，貝殼中的氨基酸類有機(jī)物熱降解后部分以胺的形式揮發(fā)出來日本岛国视频精品极品视频观看，另一部分則轉(zhuǎn)化為不可揮發(fā)的硝酸鹽的形式色色九九九，600℃有機(jī)物完全消失；同時911自拍，貝殼碳酸鈣的文石晶相隨溫度而變化国内自拍53页，500℃時轉(zhuǎn)變?yōu)榉浇馐Y(jié)構(gòu)，其中仍有部分有機(jī)物殘留4455www看片，600℃開始分解為氧化鈣操人人操网。

The dissertation mainly consists of two parts:1. The Reaction Chemistry of Alkynes under Palladium Catalysis Part 1 studies the reaction α,β-unsaturated carbonyl compounds with alkenylpalladium intermediate generated by nucleopalladation, and discovered 1 the Pd-catalyzed tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls,2 the four-component tandem addition reaction of halides, alkynes and α,β-unsaturated carbonyls, 3 the tandem intramolecular oxypalladation-conjugate additionreaction of alkynoic acids with α,β-enals. These new reactions provide notonly efficient highly stereoselective methods for the synthesis of γ,δ-unsaturated,polyunsaturated carbonyl compounds and γ-lactonic aldehydes, but also thebasic transformations for a number of C-C bond formation reactions which can be usedto design synthesis of many acyclic, cyclic or polycyclic compounds.

本論文的主要工作分為兩個部分：一、鈀催化下炔烴的反應(yīng)化學(xué)在本小組前人工作的基礎(chǔ)上免费中文字幕爱爱小视频，我們詳細(xì)研究了炔烴親核鈀化產(chǎn)生的烯基鈀中間體與α榴莲视频下载ios下载，β-不飽和羰基化合物的反應(yīng)，發(fā)現(xiàn)兩價鈀催化下鹵離子-炔烴-α综合网欧美呦呦一区二区，β-不飽和醛酮的串聯(lián)加成反應(yīng)mmm.色、鹵離子-炔烴-α秋霞午夜影院717，β-不飽和醛酮的西組分串聯(lián)加成及炔酸分子內(nèi)氧鈀化-串聯(lián)Michael型加成反應(yīng)；由此發(fā)展了γ2021日本三级片，δ-不飽和醛酮欧美亚洲另类网站、多不飽和羰基化合物和帶有醛酮基側(cè)鏈的γ-丁內(nèi)酯衍生物的高立體選擇性合成方法，這一過量鹵離子存在下的烯基鈀對α美熟妇免费一区二区三区四区，β-不飽和羰基化合物共軛加成反應(yīng)的發(fā)現(xiàn)欧美大片免费喷水网站网址，為大量碳-碳鍵形成反應(yīng)的實現(xiàn)提供了基礎(chǔ)，使我們能夠從這一基本反應(yīng)出發(fā)思思热在线免费视频，設(shè)計和開發(fā)多種分子內(nèi)中文字暮-色哟哟、分子間的碳碳成鍵反應(yīng)，以好的立體无码字幕AV一区二区三区蜜芽、區(qū)域選擇性組建開鏈好看的三级片网站、環(huán)狀及多環(huán)類型的化合物。

The antioxidant activity of some of compounds of extracted from Ligustrum sinens is analyzed. Results show that some compounds have antioxidant activity, and two compounds have strong antioxidant activity.

對女貞小臘的一些化學(xué)成分進(jìn)行的抗氧化實驗表明在线无码不卡大黄，部分化合物具有較好的抗氧化活性日日精品人人在看人人在看，個別化合物有很強(qiáng)的抗氧化活性。

Combined with GC-MS and GC-FTIR analysis, experimental result showed that bio-oil produced from cellulose mainly composed of LG and HAA, bio-oil from xylan mainly composed of acid compounds and aldehyde compounds, while bio-oil from lignin composed of phenol compounds with different functional groups such as methoxyl group, alkyl group and hydroxyl group. We research the thermal stability of the main product.

結(jié)合GC—MS三级黄在线播放、GC—FTIR分析技術(shù)對生物油的組分進(jìn)行了分析久久99热这里只有精品7，得出了纖維素?zé)崃呀馍傻纳镉鸵宰笮暇厶呛鸵掖既橹鳎揪厶菬崃呀獾玫降纳镉椭饕獮樗岷涂啡┑冗吓穡ww，木質(zhì)素?zé)崃呀馍傻纳镉偷闹饕煞直椒宇惢衔锩夥岩患禷一片手机看，并分析了各主要產(chǎn)物的熱穩(wěn)定性。

We have investigated on the chemical constituents of Nepeta partite collected from Gansu Zhuanglang, and twenty eight compounds were isolated from the methanol extraction of this species by chromatography techniques. Twenty five compounds were identified by means of chemical and spectra methods IR, FABMS, EI-MS,〓, DEPT, and 2D NMR）, among which four compounds were new as isopimar-15-en-3β, 8β, 20-triol; phenylethanal-3-O-（2'-glycerin）-5-O-β-D-glucopyranoside; 3-O-linolenoylglyceryl-6'-O-(α-D-galactopyranosyl）-β-D-galactopyranoside; ethyl rosemarinate.

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