化学论文英文

英语语言学偏重学术科研。你如果愿意攻读博士学位、以后在高校任教或在研究所做学术研究，应选考此专业。外国语言与应用语言学偏重实际运用。你如果愿意取得硕士学位后做各种语言培训等工作，应选考此专业。我是川大的，我给你看看川大的硕士专业的课程：英语语言文学专业。研究方向：现当代英美文学、美国文化研究、加拿大文化研究、欧洲文化研究；主干课程：第二外语、英语写作、西方文论、文化批评、作家与作品专题、美国文化与文学专题、加拿大小说、论文写作、两次大战间美国小说、十九世纪美国浪漫主义小说、美国重要历史文献选读、莎士比亚戏剧、英美诗歌、英国文学专题、美国文学专题、加拿大历史文献选读、加拿大研究引论、加拿大文化专题、欧洲文明史、欧洲一体化研究、欧洲国别文化与文学专题。外国语言学及应用语言学专业。（以英语为例）研究方向：现代英语及语音理论、英语翻译理论与实践；主干课程：第二外语、外语写作、应用语言学（英）、语言理论研究（英）、语言哲学（英）、翻译通论（英）、英汉互译实践（英）、语义学、词汇学、语音语调学、文学翻译基础（英）、口译理论与实践（英）、名译评析（英）、论文写作、心理语言学、人类语言学、俄语口译、阅读与翻译。

小弟，自己翻译吧。哥前两天才把化学翻译搞完。只要通顺就行，他不会对着英文翻译的。今天去老师那里他说随便搞一段都不会知道。给你出个主意，用谷歌然后自己调语序。

那些数据库啊 学校都应该买了的 上本校的图书馆什么的看看 9-[2-(3-Carboxy-9,10-diphenyl)anthryl]-6-hydroxy-3H-xanthen-3-ones (DPAXs) The most widely used 1O2 trap is 9,10-diphenylanthracene (DPA), which reacts rapidly and specifically with 1O2 to form a thermostable endoperoxide at a rate of k =3106 M1 The decrease in absorbance at 355 nm is used as a measure of the formation of the However, DPA derivatives are not very sensitive probes because the detection is based on the measurement of absorbance [79] Umezaka et [79] fused DPA with a fluorophore (fluorescein) aiming to associate the first’s reactive characteristics with the second’s fluorescent Fluorescein was chosen as fluorophore since it has a high fluorescence quantum yield in aqueous solution and is able to be excited at long From this fusion resulted 9-[2-(3-carboxy-9,10-diphenyl)anthryl]-6- hydroxy-3H-xanthen-3-ones (DPAXs) (F 11) [79] Thus, DPAXs were the first chemical traps for 1O2 that permitted fluorescence They react with 1O2 to produce DPAX endoperoxides (DPAX-EPs) (F 11) DPAXs themselves scarcely fluoresce, while DPAXEPs are strongly The mechanism accounting for the diminution of fluorescence in DPAXs and its enhancement in DPAX-EPs remain unclear [79] The fluorescence intensity of fluorescein derivatives is known to be decreased under acidic conditions as a consequence of the protonation of the phenoxide oxygen In order to stabilize the fluorescence intensity at physiological pH, electron-withdrawing groups wereincorporated at the 2- and 7-positions of the xanthene chromophore, leading to Cl (DPAX-2) and F (DPAX-3) (F 11) This modification lowered the pKa value of the phenolic oxygen atom [79] DPAX-2 was used to detect the production of 1O2 from two different generation systems: the MoO4 2/H2O2 system and the 3-(4-methyl-1-naphthy)propionic acid endoperoxide (EP-1) system, which act at different pH values (5 and 4, respectively) In both cases an increase of the probe’s fluorescence was verified when in contact with the generating These results confirmed DPAXs’ advantage when detecting 1O2 in neutral or basic aqueous solutions [79] The behaviour of this probe towards H2O2, !NO and O2 ! was also studied, but no change in the intensity of the fluorescence was observed for any of these reactive These facts corroborate the specificity of this probe for 1O2 [79] The detection of 1O2 in biological samples was also With this purpose, DPAX-2 diacetate (DPAX-2-DA) was prepared, since it was considered to be more permeable to DPAX-2-DA is hydrolysed by intracellular esterases to generate DPAX- Both DPAX-2 and DPAX-2DA were tested and compared in the same assay However, cells were stained similarly in both This observation probably means that DPAX-2 itself is also membranepermeable

建议你去一些专业的环保网站查询，或者去一些具体部门咨询。这些问题一般资料都比较难收集。只有专业性的部门和机构才有~~