化合物

Totally, 147 flavor compounds, which comprised of 17 acids, 12 alcohols, 16 aldehydes, 36 esters, 12 furans, 13 ketones, 14 miscellaneous compounds, 8 phenols, 6 pyrans, 4 pyrazines, 3 pyrroles, 6 sulfur-containing compounds, were identified.

共鉴定出147种风味化合物，其中酸类17种、醇类12种、醛类16种、酯类36种、呋喃12种、酮类13种、杂环化合物14种、酚类8种、吡喃6种、吡嗪类4种、吡咯3种、含硫化合物6种。

Trees have adsorption, absorption of pollutants or impede the spread of pollutants, trees absorb SO2, nitrogen oxide, hydrogen nitrogen compounds, Cl, fluorine compounds and Hg, Cr, and other heavy metals.

树木具有吸附、吸收污染物或阻碍污染物扩散的作用，树木吸收SO2、氮氧化合物、氮氢化合物、Cl、氟化合物和Hg、Cr等重金属。

The coupling reaction of aryl iodides, bromides and chlorides with differentolefins catalyzed by catalyst 2 and 4 was studied. It was found that compounds 2 and 4 anchored on active carbon are efficient catalyst for the Heck reaction in the case of aryl bromides and aryl chlorides as substrates (Scheme 3). It is notable that catalyst 4 has higher efficiency for aryl chlorides.___^H Cat.2 or 4, Base HXSolution, 100C or 140

以化合物2和4为代表，重点研究了活性炭负载的二茂铁亚胺环钯化合物催化碘代苯、溴代苯和氯代苯与活泼烯烃之间的偶联反应(Scheme 3)，发现活性炭负载的二茂铁亚胺环钯化合物2和4均可用于催化多种溴代和氯

We use AOT/iso-octane/water reverse micelles as a biological model to mimic the properties of triplet-excited-state porphyrin in the interfacial region. The amphiphilic property of compound is difficult to evaluate for different system.

用AOT／异辛烷／水反相胶束体系营造了一个多相、多界面的环境，通过对卟啉化合物三重态寿命的测量，研究了以亲水基团为端基的具有不同侧链链长的两亲卟啉化合物的界面行为，探讨了卟啉化合物的亲水疏水性质与界面环境间的相互作用，这对卟啉类光疗药物的结构优化具有帮助。

Alkylbenzene, normal alkanes and alkylcyclohexane on the pyrolysates of P. Boryanum at 300℃ had uniform distribution and the relative content of them was similar, indicating that they originated from same precursors. Fatty acids, alcohol and ketone in algal cell are the possible precursors. For example, the precursor of relatively abundant C〓 alkylbenzene and alkylbenzene with C〓 side chain perhaps related with palmitic acid. N-alkylnaphthalene in pyrolysates at 300℃ probably derived from alkylation of cleavage products of aromatic steranes and terpanes.

在盘星藻300℃热解产物中，烷基苯、正烷烃和烷基环己烷碳数分布一致、各化合物的相对含量接近，表明它们有相同的来源，藻类体内的脂肪酸、醇和酮及细胞壁等物质可能是其母质，相对含量较高的碳数为16及侧链碳数为16的烷基苯类化合物，其前身物可能与软脂酸有关。300℃热解产物中的正烷基萘类化合物，可能由芳香甾、萜类的降解产物与直链烃类加成烷基化而形成。

The results indicated that the extraction rate by acetone is the highest,followed that by alcohol and methanol in turn.

结合化学反应，初步认为苦荞麦粉含有黄酮醇类化合物，苦荞麦壳含有黄酮化合物，而甜荞麦壳和甜荞麦粉中可能含有黄烷酮化合物。

In order to find screening rules suitable for lead compounds of pesticide,five descriptors:logarithm of partition coefficient of octanol/water,relative molar weight,number of hydrogen-bond donors,number of hydrogen-bond acceptors,polar surface areaand carcinogenic and mutagenic toxicities of 242 fungicides,512 herbicides and 399 insecticides were calculated and analyzed.

1996年，Lipinski通过对2000多种口服药物进行分析，提出了用于药物分子筛选的&5规则&，即化合物疏水常数(CLogP≤5或MLogP≤4.5)，相对分子质量不大于500，氢键给体数不大于5和氢键受体数不大于10[1]。2003年，Andrew等报道了从高通量筛选结果中获取先导化合物的规则：化合物疏水常数≤3，相对分子质量小于450[2]。

The effects of phenolic acid compounds in vegetables and fruits on metabolicactivation of BaP in rats,as well as 〓 and TCA induced lipid peroxidation inmouse and Salmonella typhimurium TA104 cells were investigated using DNAadducts as a biomarker to assess DNA damage induced by xenobiotic carcinogens.BaP was used to study the genotoxic carcinogenesis,while 〓 and TCA were usedto study the non-genotoxic carcinogenesis.The possible protection mechanisms ofphenolic acid compounds on DNA damage were studied.

本研究根据化学致癌过程的遗传毒性和非遗传毒性机理，以DNA加合物作为机体接触外来化学物而导致DNA损伤的生物学标志物，通过观察酚酸类化合物对大鼠体内BaP活化代谢以及〓和TCA诱导小鼠肝微粒体脂质过氧化的影响，及酚酸类化合物对BaP和TCA诱导的沙门氏菌TA100和TA104形成DNA加合物的影响，探讨蔬菜、水果中酚酸类化合物对外来化学物诱导的DNA损伤的保护机制。

Sixteen compounds were identified at more than 3 stages, in which 14 terpenoid compunds, 1 aromatic compound and 1 amine compound.

有16种化学成分在3个以上时期能检测到，其中14种萜类化合物，1种胺类化合物和1种芳香化合物。

The ESR data of 3f suggest that Cu〓 is in a distorted tetrahedral field, that is to say, Cu〓 is coordinated to three tertiaty nitrogen atoms and one chloride anion.

为了探测模型化合物中Cu〓的配位情况和几何构型，采用相同的方法合成和表征了杂双核化合物3f，ESR信号结合质谱信息表明杂双核化合物3f中，Cu〓是四配位的，即它与一个C1〓和三个叔铵氮原子配位而处于变形的四面体场中。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。