酸基

Genistein ; perfusion pressure ; vascular bed ; L-NAME ; sodium orthovanadate

三羟异黄酮；灌流压；血管床； L-硝基精氨酸甲酯；正钒酸钠

Using the KMnO4 titration method to detect the catalase activity and the sulfosalicylic acid method to detect the free proline content, the changes of catalase activity and free proline content of plants in Kaili area under air pollution were studied with the representative plants such as Camellia oleifera, Pinus massonina, Cunninghamia lanceolata, Woodwardia japonica and Dicranopteris pedata in Kaili area as research subjects.

方法］以凯里地区的代表性植物（油茶、马尾松、杉树、狗脊蕨和铁芒萁）作为研究对象，采用KMnO4滴定法测定过氧化氢酶的活性，采用磺基水杨酸法测定游离脯氨酸的含量，研究大气污染影响下凯里地区植物过氧化氢酶活性、游离脯氨酸含量的变化情况。

The main compounds of essential oils were Pentadecane（20.88%,46.56%）,Ethyl-cinnamate(25.60%,10.94%), Ethyl-p-methoxycinnamate(28.69%,2.41%),3-Carene(3.31%,11.36%).

主要成分均为十五烷（20.88%，46.56%），桂皮酸乙酯(25.60%，10.94%)，对甲氧基桂皮酸乙酯(28.69%，2.41%)，3-蒈烯(3.31%，11.36%)。

Ethyl alcohol, 3-methyl-4-oxo- pentanoic acid, acetic acid butyl ester, 2-methyl-butanoic acid ethyl ester, diethyl phthalate,-2,4-Decadienal were the same volatiles d from the 10 cultivars.

其中共有组6种，为乙醇、3-甲基-4-羰基戊酸、乙酸丁酯、2-甲基丁酸乙酯、邻苯二甲酸二乙酯、-2，4-癸二烯醛。

Paraacetaminophenyl-β-hydroxyethylsulfone can be used as raw material to produce the target product 2-sulfonic-4-(β-sulphatoethyl-sulphone) phenylamine through sulfonationating and hydrolytic reactions.

本文研究了以对乙酰氨基苯基-β-羟乙基砜为原料，经磺化和水解反应，制得产品2-磺酸-4-苯胺的合成工艺，以及2-磺酸-4-乙基砜基硫酸酯苯胺钠盐后处理的最佳操作工艺。

The extraction of Pr3+was studied by using heptane containing bis(2-ethylhexyl)phosphinic acid in sodium perchlorate,chloroacetic acid and citric acid medium ,respectively.

研究了二(2-乙基己基)膦酸(PIA-8)的庚烷溶液分别在高氯酸钠、氯乙酸、柠檬酸介质中对Pr3+的萃取。

Thus, the phosphonate moiety is remainedin the products and this methodology can be used in the synthesis of substituted vinylphosphonates.

因此在本烯化反应中保留了膦酸酯基团，可用来合成取代的烯基膦酸酯。

The derivatives of phenylsulfonyl phosphonate containingselenomorpholine were synthesized by Michaelis-Becker reaction and N-seleno-morpholinyl alkylphosphonates were formed by Mannich reaction.

研究了中间体硒代吗啉、苯并异硒唑酮及目标化合物的合成条件，利用Michaelis-Becker反应合成了一类硒代吗啉磺酰胺膦酸酯衍生物，利用Mannich反应合成了N-硒代吗啉基烷基膦酸酯衍生物。

Because the tungsten from the phosphotungstic acid could pull out and deposit on the surface of catalyst, and the electronegativity of Mo-O is smaller than that of W-O.

最后，根据杂多酸的结构和相应的物理化学性质，对杂多酸与铂基催化电极电催化氧化甲醇的机理进行了初步探讨。

Keywords aluminum polychloride;Ni-Al alloy powder;sodium metaaluminate;hydrochloric acid addition;concentration ratio of hydroxyl to alumi

聚合氯化铝； Ni-Al合金粉；偏铝酸钠；加酸量；盐基度

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。