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The third category is planted second-generation Chinese fir, the soil phenol content is highest. It shows that along the ecosystem conversion, or as the increase of Chinese fir planted generation, the phenols in soil are accumulated to a certain extent.(6) Detecting the soil of four systems and found that there exist p-hydroxybenzoic acid, vanillic acid and ferulaic acid, but not exist cinnamic acid.

根据主成分分析结果,大致可以把4种系统分成3类,第一类为天然更新常绿阔(来源:ABC论文8f网www.abclunwen.com)叶林,其土壤含量低;第二类为老龄杉木林和二代杉木萌芽天然更新林,其土壤含量较高;第三类为二代杉木人工林,其土壤含量最高。

The pungent compounds of ginger were mainly 6-gingerol (9.38%), 6-shogaol (7.59%), zingerone (9.24%) produced by the thermal degradation of gingerols or shogaols.

在姜辣素成分中,6-异姜、-10-异姜烯和-10-异姜烯3种化合物是新发现的未见报道的化合物。

n thes paper, the oligomers with different molecular weight of monohydroxylpolyethersulfones were synthesized in solution and the optimum condition ofpolymerization was obtained; With phase transfer catalyst method,the oligomerswas obtained and transformed to monovinylpolyethersulfones macromer. Its structure was characterized with IR and 1H-NMR.

本文采用溶液法以单(4-氯-4'-羟基二苯砜)为原料合成了不同聚合度的单低聚体,得到了控制聚合度的最佳聚合条件;用相转移催化剂法成功地将单转化为单烯大分子单体,并用IR、1H—NMR对其结构进行了表征;测定了双键官能度均在1.90以上。

The interactions between phenol,m-cresol or catechol with DNA sensor were analyzed, results indicated that the threephenols damaged DNA.The direct oxidation peaks of DNA were decreased linearly withthe phenols concemtrations.R%D_(50) values showed that the m-cresol damnified DNA mosteasily.

研究了苯、间甲和邻苯二与DNA的作用,结果表明其对DNA有损伤作用,且存在剂量效应关系,一定浓度范围内,DNA的峰电流与的浓度呈线性下降关系。R%D_(50)值分析结果表明这三种污染物中间甲最容易损伤DNA。

An enzyme that hydrolyzes dipeptides into their constituent amino acids.

一种有机化合物,c10h7oh,存在于两种异构形式,α-萘和β-萘

200 forepart pregnant women with ASA Ⅰ~Ⅱgrade who free will stop gestation,they were divided into 4 groups randomly :P group was simplicity propofol; F group, T group and K group was mainlined fentanyl 0.75μg/kg,tramadol 1mg/kg,ketamine0.2mg/kg respective before propofol abduction, and continuous detected MAP,HR,SpO2 in the operation, and to note first dosage and total dosage of propofol, revival time, leave hospital time, ill reactivity in the operation.

200例ASAⅠ~Ⅱ级、自愿终止妊娠的早孕妇女随机分为四组:P组,单纯异丙麻醉组;F组、T组、K组在异丙诱导前分别静注芬太尼0.75μg/kg、曲马多1mg/kg、氯安酮0.2mg/kg。术中连续监测MAP、HR和 SpO2。记录各组病人异丙的首剂量和总剂量、苏醒时间、离院时间及术中术毕不良反应的发生情况。

Determination of pyrogallol by Flow Injection Chemiluminescence Assay;2. Study on the Auto-oxidation of Pyrogallol by Electrochemistry;3. The kinetics of pyrogallol oxidation catalyzed by the complexes have been studied.

研究了以邻苯三为底物各配合物的多氧化酶活性,结果表明:4种配合物催化邻苯三氧化都符合米氏方程曲线,且催化活性都随pH值的升高而增加。

In the enzymatic reaction, the browning substrates are oxidized toο-quinones and finally polymerized into the brown-colored by-products.To identify the browning substrates caused by PPO of pericarp tissues of litchi fruit, the experiments were conducted for the first time to separate, select and purify these substrates.

一般认为荔枝采后褐变主要是由于果皮细胞中多氧化酶与类底物区域化分布的破坏而导致酶促反应的发生,表现为类物质被催化氧化为醌,后者则通过聚合反应形成褐色产物。

These also were significant difference between different areas in Shandong province; for example, the highest mortality rate of the disease in Feicheng county was 41 times as the low death rate in Rushan county.

植物雌激素为杂环多类化合物,是一种具有弱雌激素作用的植物成份,主要包括异黄酮、木素和香豆雌三大类。

By the approach of self-assembly and electropolymerization,membrane for Bisphenol Ahas been synthesized with bisphenol A as template molecule,o-aminothiophenol as functional monomer.

以双A为模板分子,邻氨基苯硫为单体,采用自组装和电聚合方法,在电极表面制备了对双A有选择性的分子印迹聚合物膜。

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Do you know, i need you to come back

你知道吗,我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书,王祥生,李德昌。安徽省首次发现嗜群血蜱。

Chapter Three: Type classification of DE structure in Sino-Tibetan languages.

第三章汉藏语&的&字结构的类型划分。