查询词典 compounds

Several transient compounds were synthesized by the homo- and heterogeneous reactions of reactive halogen compounds, In-situ ultraviolet photoelectron spectroscopy and photoionization mass spectroscopy as well as theoretical calculations were used to study their molecular structures, stability and molecular orbital properties, their electronic structures and geometric structures were obtained for the first time; Simultaneously, the electronic structure and thermal dissociation of acetyl peroxynitrate and trifluoroacetyl peroxynitrate which have great importance in the atmospheric chemistry were studied; The substituent effects of series of halopyridines and halothiophenes were studied by the ultraviolet photoelectron spectroscopy method for the first time. The atmospheric chemical reaction between peroxyacetyl radicals with IO radicals as well as the dissociation of the most stable isomer of CH3COIO3 were calculated by density functional theory, it was found that the CH3COOIO2 isomer may be act as a new reservoir of inorganic iodine in the stratosphere.

通过活性卤素的系列均相与非均相化学反应合成了几种瞬态物种，采用原位紫外光电子能谱和光电离质谱结合量子化学理论计算对化合物的分子结构、稳定性以及分子轨道特性进行了研究，首次获得了这些物种的电子结构和几何结构的信息；同时研究了大气中有重要作用的乙酰过氧硝酸酯和三氟乙酰过氧硝酸酯的电子结构性质及热解过程；采用紫外光电子能谱手段首次研究了系列卤代吡啶和噻吩的取代基效应；通过量子化学理论计算研究了乙酰基过氧自由基与IO自由基的大气化学反应及其最稳定异构体CH3COOIO2的解离，发现该物种可能是无机碘化合物在平流层中的储库物种。

Phosphorus compounds result from degradation of compounds such as nucleic acids and phospholipids and occur as inorganic phosphates,that is ,orthophosphate or polyphosphate,or organic phosphorus.

"含磷化合物是由象核酸及磷脂这样的化合物的降解而产生的，并以无机磷酸盐，也就是正磷酸盐或多磷酸盐的形式存在，或以有机磷的形式而存在"

The applications of oxime compounds in recent years to agriculture were reviewed according to different chemical structures. The developing trends and broad application prospects of oxime compounds were also introduced.

按照不同的生物活性和结构进行分类，对近年来肟类化合物在农业中应用作了综述，著重从分子合成和生物活性进行讨论，并对它的发展趋势、应用前景作了进一步展望。

Methods: Antineoplastic compounds were screened by bioassay-guided method with partitive extraction and multiple column chromatographies(Sephadex LH-20, ODS and preparative HPLC). Structures of active compounds were determined by high-resolution 2D NMR(600 MHz) and ESI-MS techniques.

通过分级萃取和多种硅胶柱层析（Sephadex LH-20凝胶过滤、ODS反相层析和HPLC）追踪分离抗癌活性成分；利用电喷雾离子质谱和高分辨(600 MHz)核磁共振二维谱技术鉴定化合物的结构。

A total of 113 volatiles were detected in seven fruit wines, and 80 volatile compounds were identified by GC-MS. There were 49, 40, 49 and 51 kinds of volatile compounds identified in cider wine, lichee wine, pawpaw wine, and mulberry wine, respectively.

在4种果酒中共检测出113种挥发性成分，鉴定出80种，在苹果酒中49种，荔枝酒、木瓜酒和桑椹酒中分别检测出40种、49种、51种化合物。

Other compounds include the nitrides, exceptionally hard materials made from nitrogen and a metal; cyanides; azides, used in detonators and percussion cap s; and thousands of organic compounds containing nitrogen in functional groups or in a linear or ring structure.

其它的化合物包括氮化物，是由氮和金属生成的异常坚硬的材料；氰化物；叠氮化物，用作引爆剂和雷管；还有数千种含氮的有机化合物，以功能团或者线性或环状结构的形式存在。

The paper reviews the characteristics of phenol compounds and the progress on modification of these compounds in recently years.

综述了天然酚酸类化合物的性质及近年来对其改性的新进展。

Results］Lots of active compounds such as phenyl and oxygen compounds were found.

结果］水杨梅根提取物中含有较多的苯基及含氧基等活性基团成分。

Results: Seventeen fatty acids compounds, three sterols and one phytol were identified from p. alatum Buch.-Ham., amounting to 67.22% of the total constituents, linolenic acid,linoleic acid and palmic acid were the main compounds.

结果：从头状蓼中分离鉴定了17个脂肪酸成分，3个甾醇类成分和植醇，占色谱总出峰面积的67.22%，主要成分为亚麻酸，亚油酸和棕榈酸。

The constituents of bulb of F. puqiensis were studied. Five steroid alkaloids were isolated. The plane structure and stereoscopic configuration of 4 compounds were elucidated. They are named as puqienine A (FP-33), puqienine B (FP-3), N-demethyl-puqietinone (〓 FP-34) and puqietinone (〓, FP-9). Puqienine A and N-demethyl-puqietinone are new compounds. Puqienine B is as same as FPQ-3 elucidated by Prof.

对F.puqiensis鳞茎化学成份进行了研究，分得5个甾体类生物碱成分，并采用 UV、IR、EI-MS、1D-NMR，HHCOSY、CHCOSY、HMBC和X-RAY等光谱技术和理化常数测定，鉴定出4个化合物的平面结构和立体构型，分别为蒲圻贝母碱甲（puqienineA，FP-33）、蒲圻贝母碱乙（puqienineB，FP-3）、N-去甲蒲贝酮碱（N-demethyl-puqietinone，FP-34）和蒲贝酮碱（puqietinone，FP-9），其中蒲圻贝母碱甲和N-去甲蒲贝酮碱为新化合物。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了