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photodegradation product
相关语句
  光降解产物
     Photodegradation product analysis of gatifloxacin injection by HPLC-MS
     加替沙星注射液光降解产物的LC-MS分析
短句来源
     Results showed that the concentrations of Cl- and NO3- in photodegradation product increased with prolonging exposure to the light and tended to constant.
     结果表明,光降解产物中Cl~-和NO_3~-的浓度随光照时间的增加而增大,并趋于一恒定值.
短句来源
     METHODS The photodegradation product of gatifloxacin injection was analysed by RP-HPLC/electrospray ionization mass spectrometry with a Zorbax SB-C 18 (4.6 mm×150 mm ID, 5 μm) column. The mobile phase was composed of 3% acetic acid in acetonitrile and 3% acetic acid in water (15∶85, v/v).
     方法 用液相色谱 质谱联用技术分离并鉴定加替沙星注射液光降解产物 ,以 3%醋酸乙腈溶液 3%醋酸溶液 (15∶85 )为流动相 ,紫外检测波长 2 93nm ,质谱检测为电喷雾离子化正离子方式。
短句来源
  “photodegradation product”译为未确定词的双语例句
     Identification of Photodegradation Product of 17α-ethynylestradiol Using GC-MS
     GC-MS联用鉴定17α-乙炔基雌二醇光降解的产物
短句来源
     CONCLUSION The structure of the photodegradation product may be 6-fluoro-1,4-dihydro-8-methoxy-7-(3-methy-1-piperazinyl)-4-oxo-3-quinolinecarboxylic acid.
     结论 推断加替沙星注射液光降解杂质的结构为 6 氟 8 甲氧基 7 (3 甲基 1 哌嗪基 ) 1,4 二氢 4 氧代 3 喹啉羧酸 ;
短句来源
     The chloride ion has important effect on photodegradation in aqueous solution of lomefloxacin and results in producing chlorine derivative as the highest photodegradation product.
     洛美沙星盐酸水溶液的光降解随离子强度的增加降解速率也增加 ,在水溶液中氯离子对其光降解有极大影响并生成高产率的氯取代衍生物 ;
短句来源
     ObjectiveTo separate a photodegradation product and to study its structure.
     目的分离、制备间尼索地平的光解产物 ,确定其结构。
短句来源
     RESULTS The molecular weight of the photodegradation product was 355,40 less than that of gatifloxacin.
     结果 加替沙星注射液经光照后增加了一光降解杂质峰 ,该杂质的相对分子质量为 335 ;
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     The Photodegradation of MBAMT and Its Decomposed Product in Water Environment.
     叶青双及其降解物在水环境中的光降解
短句来源
     ObjectiveTo separate a photodegradation product and to study its structure.
     目的分离、制备间尼索地平的光解产物 ,确定其结构。
短句来源
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  photodegradation product
To characterize the electrochemical behavior of the photodegradation product of nifedipine, i.e., 2,6-dimethyl-4-(2-nitrosophenyl)-3,5-pyridine-carboxylic acid dimethyl ester (NPD) in different electrolytic media.
      
Electrochemical and Spectroelectrochemical Behavior of the Main Photodegradation Product of Nifedipine: The Nitrosopyridine Deri
      
A simple and rapid micellar electrokinetic capillary chromatographic (MEKC) method for analysis of rofecoxib (ROF) and its photodegradation product (PDP) in pharmaceutical preparations has been developed and validated.
      
Determination of rofecoxib, in the presence of its photodegradation product, in pharmaceutical preparations by micellar electrok
      


Photolysis of BHC in aqueous solution was investigated. A high pressure Hg lamp was used as the eight source. It was found that with the exception of a-form the photochemical degradation and photo-isomerization of the BHC isomers studied take place simultaneously, and that in isomerization process the conformation of one of the Cl atcms in BHC tends to change with the result of formation of a more light-stable isomer. By use of GC/MS method, the following compounds were identified as the photodegradation...

Photolysis of BHC in aqueous solution was investigated. A high pressure Hg lamp was used as the eight source. It was found that with the exception of a-form the photochemical degradation and photo-isomerization of the BHC isomers studied take place simultaneously, and that in isomerization process the conformation of one of the Cl atcms in BHC tends to change with the result of formation of a more light-stable isomer. By use of GC/MS method, the following compounds were identified as the photodegradation products of BHC in aqueous solution: chlorobenzene, dichlorobenzene, tetrachlorocyclohexene, chlorophenol, dichlorophenol, trichlorophenol and trichlorocyclohexenol. A photo degradation mechanism involving reductive dechlorination and hydroxy substitution was proposed.

以高压汞灯为光源,研究了六六六(BHC)在水溶液中的光解。在水溶液中,除α-BHC外,BHC的光化学降解与光异构化是同时发生的。光异构化规律是:分子中一个氯原子改变其原来构象而朝着形成对光更加稳定的异构体转化。经色质谱联用鉴定,证明氯苯、二氯苯、四氯环己烯、一氯酚、二氯酚、三氯酚及三氯环己烯醇为BHC在水溶液中的光解产物。提出了包含还原脱氯和羟基取代的这一光解反应的历程。

A nifedipine matrix tablet (A) was prepared by using hydrophilic polymer. The dissolution behaviors of nifedipine formulation were tested by the paddle method. It was found that the dissolution behavior of A was little affected by in vitro environment, i. e., pH, stirring speed. A specific gas chromotography with electron capture detection for nifedipine was developed, In vivo profiles of its preparations were demonstrated to fit two-compartment model. The pharmacokinetic parameters were calculated by using...

A nifedipine matrix tablet (A) was prepared by using hydrophilic polymer. The dissolution behaviors of nifedipine formulation were tested by the paddle method. It was found that the dissolution behavior of A was little affected by in vitro environment, i. e., pH, stirring speed. A specific gas chromotography with electron capture detection for nifedipine was developed, In vivo profiles of its preparations were demonstrated to fit two-compartment model. The pharmacokinetic parameters were calculated by using non-linear regression computer program. The bio-equivalence study showed that no statistical differences occurred in AUC, C_(max), T_(max)etween A and one sustained-release tablet from aboard (B), but differences occurred between A and one conventional tablet (C). The extent of bioavailability was 97.66% of B and 281.80% of C. An accelerated testing method was used to investigate the effect of temperature, humidity and light on the stability of A. It was confirmed that nifedipine is a photoinstable compound. Light-protective effect of coating-film is very marked. A TLC method was used to detect photodegradation product.

根据水凝胶骨架释放机制,研制了硝苯吡啶溶蚀型骨架片剂A。其体外溶出行为符合一级动力学过程。体外环境如介质、桨速不影响其溶出行为。片剂A的体内血浓用气相色谱法测定,其体内配置状态以二室模型描述较为适宜,经计算机模型嵌合程序迭代处理求得动力学参数。生物等效性研究表明:片A与国外长效片B无显著差异,而与市售普通片C有显著差异。A相对于B和C的生物利用度分别为97.66%和281.80%。稳定性试验表明片剂A对光不稳定,温度、湿度对其基本无影响。薄膜包衣延缓了药物的光解。

A UV catalytic photodegradation of tributyltin chloride is reported. The reaction is a first-order kinetic process. The reaction rate of UV catalytic photodegradation is influenced by factors such as temperature, light intensity,pH values, dissolved oxygen and the amount of catalyst used. Light intensity and the amount of catalyst used are the most important affecting factors. The main photodegradation products are dibutyltin and inorganic tin.

本文报导了三丁基氯化锡的紫外光催化降解反应。降解过程是一个一级动力学反应。反应速率受催化剂用量、光照度、反应pH值及反应液中的溶解氧含量等因素的影响。其中,催化剂用量和光照度是主要的影响因素。三丁基氯化锡的光催化降解产物为二丁基锡及无机锡。

 
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