查询词典 polycyclic

A method for the determination of polycyclic aromatic hydrocarbons in smoked meat by gas chromatography/mass spectrometry has been established.

建立了熏肉中多环芳烃的气相色谱/质谱测定方法。

This method is sensitive, accurate and suitable to the determination of PAHs in smoked meat.Key words: gas chromatography/mass spectrometry; polycyclic aromatic hydrocarbons; smoked meat

方法具有灵敏度高、准确度好、能同时分离测定20余种多环芳烃化合物的优点，适合于熏肉中多环芳烃化合物的分析测定。

Cytochrome P450 BM-3 (CYP102) from Bacillus megaterium catalyzes the subterminal hydroxylation of long-chain fatty acids (C12 to C20) at the positions ω-1,ω-2,ω-3 and the epoxidation of unsaturated fatty acids. Artificial mutants of P450 BM-3 also hydroxylate substrates like short-chain fatty acids (C8 to C10), alkanes, cycloalkanes, heteroarenes and polycyclic aromatic hydrocarbons, which offers potential applications in the pharmaceutical industry, environmental measurement and bioremediation and chemical industry.

细胞色素P450BM-3来源于Bacillus megaterium，能催化长链脂肪酸C_(12-C_(20)的次末端(ω-1，ω-2，ω-3)羟化及不饱和脂肪酸的环氧化，其突变体催化的底物拓展到中链的脂肪酸C_8-C_(10、烷烃、环烷烃、杂环烃、多环芳烃等，因此在医药工业、环境检测和修复及化学工业具有广阔的前景。

Polycyclic aromatic hydrocarbons have already been verified into hydrocarbons with "mutagenesis, carcinogenesis and teratogenesis".

多环芳烃是指两个或者两个以上的苯环连在一起的一类化合物。

Under laboratory conditions, this paper studied the adsorption of different concentration 40, 400 and 4 000 μgL^(-1 polycyclic aromatic hydrocarbons including low molecular weight acenaphthylene, phenathrene and chrysene and high molecular weight benzo perylene in seawater by the leaf litters of Kandelia candel and Avicennia marina at different decomposition status.

在实验室条件下，研究了海水中多环芳烃（含低分子量PAHs苊、菲和以及高分子量PAHs苯并芘）浓度分别为40、400和4000μgL^(-1)时，红树植物秋茄和白骨壤不同分解状态落叶碎屑对PAHs的吸附作用。

Silica has a brush type surfacewith the stationary phase and silanol groups, whereas PGC has aflat surface composed of sheets of hexagonally arranged carbonatoms, where the spacing between sheets is similar to that in alarge polycyclic aromatic molecule.

硅胶表面就像一个刷子，布满了硅醇基和固定相，而 PGC 是由碳原子排布成6角形的平整表面，就像芳环一样。

In order to develop a new method to study the desorption and bioavailability of hydrophobic organic chemicals in soils, a method using semi-permeable membrane device to study desorption of HOCs in soils has been set up, and assisted desorption of polycyclic aromatic hydrocarbons, phenanthrene, pyrene, and benzo［a］pyrenein three different kinds of soils was studied using SPMD.

为了开发一种表征土壤中憎水性有机污染物解吸及生物有效性的新方法，建立了半透膜被动采样装置研究土壤中有机污染物解吸行为的方法，利用SPMD分析了多环芳烃菲、芘和苯并［a］芘在3种不同性质土壤中的辅助解吸行为。

Photoinduced Electron Transfer [2+2] Cycloaddition Reactions ofBenzannelated Isoquinolin-1-ones with Electron Deficient Alkenes Photoinduced [2+2] cycloaddition reactions of 11H-benzoxazolo[3,2-b]isoquinolin-11-one 8 and 11H-benzothiazolo[3,2-b]isoquinolin-11-one 13 with electron deficient alkenessuch as acrylonitrile, methyl acrylate, dimethyl fumarate and dimethyl maleate afforded a group of polycyclic isoquinoline derivatives bearing cyclobutane moieties ingood to excellent yields and resulted in the Schenck isomerization of the alkenes.

3苯并增环异喹啉-1-酮与缺电子烯烃的光诱导电子转移[2+2]环加成反应 11H-苯并恶唑[3，2-b]异喹啉-11-酮8和11H-苯并噻唑[3，2-b]异喹啉-11-酮13与缺电子烯烃如丙烯腈，丙烯酸甲酯，富马酸二甲酯及马来酸二甲酯的光诱导[2+2]环加成反应以高产率给出一系列含有环丁烷结构单元的多环异喹啉衍生物并导致烯烃的Schenck异构化作用。

In this paper, the single and combined toxicities of polycyclic aromatic hydrocarbons fluoranthene and copper to Phaeodactylum triconutum were studied.

在实验室条件下研究了多环芳烃荧蒽和铜对三角褐指藻的单一和联合毒性。

Quantitative expression and effect of combined pollution of heavy metals and polycyclic aromatic hydrocarbons, including phenanthrene, fluoranthene and benzopyrene, on soil enzyme were investigated during 7 weeks of incubation.

以土壤脲酶和脱氢酶为探针物质，室内培养条件下较为系统地研究了重金属和多环芳烃复合污染对土壤酶活性的影响及其定量表征。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。