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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
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。
只要300字左右的？几千字的要不要？
童鞋你好！你要的外文资料我帮你找到了！网上基本很难找到免费给你服务的！+++++++++++++++++++++++++++++++++授之以鱼，不如授之以渔：我在这里给你点搜索国际上常用的外文数据库：---------------------------------------------------------- ⑴ISI web of knowledge Engineering Village2 ⑵Elsevier SDOL数据库 IEEE/IEE(IEL) ⑶EBSCOhost RSC英国皇家化学学会 ⑷ACM美国计算机学会 ASCE美国土木工程师学会 ⑸Springer电子期刊 WorldSciNet电子期刊全文库 ⑹Nature周刊 NetLibrary电子图书 ⑺ProQuest学位论文全文数据库 ⑻国道外文专题数据库 CALIS西文期刊目次数据库 ⑼推荐使用ISI web of knowledge Engineering Village2-----------------------------------------------------------如上数据库基本都能通过在校IP免费进入外文翻译不是论文的主要内容！所以，很容易过去的！祝你好运！O(∩_∩)O
可以在百度输入“万方数据库免费入口”找个破解版的，就可以自己进去下载了，不过好像没有最新的，更新有点慢。别的非同专业人下载的你一般也不会太满意的，还是自己找吧！
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有机化学英语论文Abstract In this work the effects of the microporosity and chemical surfaceof polymeric adsorbents on adsorptive properties of phenol Textural parameters of four kinds of polymeric resins namely AB-8 D4006 NKA-II and D16 resin were separately measuredby ASAP The surface chemistry of these polymeric resins was determined by means of inverse gaschromatography (IGC) and diffusereflectance infrared Fourier transform spectroscopy (DRIFTS) Static equilibrium adsorption experiments were carried out to obtain theisotherms of phenol on the polymeric It was shown that NKA-II and AB-8 resin possessed relatively high BET surface areas andmicropore volumes while D4006 and D16 resin possessed comparatively low BET surface areas and micropore The results of IGCexperiments revealed that NKA-II resin had extraordinary high specific component of the free energy of adsorption both for polar acetone andbenzene probe and thus extraordinary strong surface polarity compared to the other polymeric It was also found that the isotherm ofphenol on NKA-II was much higher than that on the other polymeric resins due to its strongest surface polarity and largest micropore volumeamong four kinds of These experimental observations indicated that adsorption of phenol on the polymeric resins depended greatly ontheir microporosity and surface The well-developed microporosity and the strong surface polarity would improve the adsorptionof phenol on the polymeric 2004 Elsevier BV All rights Keywords: Polymeric resin; Phenol; Porosity; Surface chemistry; Inverse gas chromatography
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不知道，随便给你一个疏水缔合型聚合物P(AMTA)溶液性质的研究疏水缔合型水溶性聚合物是指在聚合物亲水性大分子链上带有少量疏水基团的一类水溶性聚合物。在聚合物水溶液中，疏水基团之间由于憎水作用而发生聚集，使大分子链产生分子内和分子间缔合。在临界缔合质量分数以上，形成分子间缔合为主的超分子结构，增大了流体力学体积，故具有较好的增黏性。在盐溶液中，由于小分子电解质的加入增加了溶液极性，使疏水缔合作用增强，表现出明显的抗盐性质。 疏水缔合型水溶性高分子很难合成，且不易表征，把疏水部分连接到水溶性聚合物链上，一般采用胶束共聚合或者使用具有表面活性的大单体进行共聚，胶束聚合需要在体系中加入大量的表面活性剂，这就增加了后处理过程的复杂性。利用表面大单体共聚合，需要事先合成大单体，这方面的技术也有相当大的难度。作者采用丙烯酸十四酯作为疏水单体，直接用沉淀聚合法制备疏水缔合型聚合物P(AM／TA)共聚物，从而使共聚反应及其产物的后处理过程较为简单易行。并用凯达尔定氮法表征共聚物的组成，研究共聚物的溶液性能和对苯丙乳液的增稠性。 1实验 1．1试剂 丙烯酰胺(AM)，质量分数不少于985％，根据文献提供的方法提纯；N,N-甲基甲酰胺(DMF)，分析纯；甲醇、氯化钠，化学纯；丙烯酸十四酯(TA)，实验室自制；苯丙乳液由福建省福州树脂有限公司提供。 1．2P(AM/TA)共聚物的合成 称取一定量的AM和TA单体，用DMF溶解，转入三颈瓶中，通氮除氧。升温至80℃，加入引发剂反应4h，过滤，产物用甲醇洗涤多次，以除去未反应的单体。40℃真空干燥至恒重。 1．3分析测试 凯达尔定氮法测定共聚物的组成。用乌氏黏度计测定共聚物溶液特性黏度[η]，测试温度为(30±O1)℃。聚合物溶液表观黏度用NDJ-I型旋转黏度计测定。 2结果与讨论 2．1共聚物稀溶液性质不同疏水基团摩尔分数的P(AM／TA)共聚物在蒸馏水和w(NaCl)=5％的溶液中的特性黏度[η]值列于表1。 聚合物的[η]正比于溶液中大分子线团的流体力学体积，因而能反应大分子线团收敛、卷曲的程度。从表1可知，随共聚物的TA链节摩尔分数的增加，其水溶液的[η]值逐渐减小，在w(NaCl)=5％的溶液中也是持续减小。这是因为在稀溶液中，疏水基团缔合以分子内缔合为主，随着TA摩尔分数的增加，分子内缔合增强，导致分子链卷曲。在盐溶液中，由于离子电荷的作用，使疏水链节分子内缔合力增强，分子链收缩，因而[η]值也持续下降。 2．2疏水基团TA摩尔分数对聚合物溶液黏度的影响 图1和图2分别表示P(AM/TA)系列共聚物及PAM在蒸馏水和w(NaCl)=5％的溶液中表观黏度与聚合物质量分数的关系曲线。PAM溶液黏度随其质量分数的增加而平缓上升，而疏水共聚物溶液的质量分数为3O％～4O％时其黏度急剧增加，表明疏水基团聚集而导致分子间缔合，形成了物理交联网络。此时共聚物溶液的质量分数即是临界缔合的质量分数。如图1所示，随TA摩尔分数增加，共聚物溶液的黏度显著增加。当疏水基团摩尔分数较高时，其溶液黏度随质量分数增加的速度更快，共聚物的临界缔合质量分数降低。如图2所示，加入Nacl溶液后，溶液表观黏度有较大提高，如质量分数为O％的P(AM/TA)-1 5聚合物溶液在20℃，转速为6r／min时，黏度达OmPs，而在水溶液中的黏度只有374mPa·s。不同TA摩尔分数的聚合物的质量分数均较其在纯水中低。Hydrophobically associating polymer P (AMTA) the nature of the study solution Hydrophobically associating water-soluble polymer is the hydrophilic polymer with a small amount of macromolecular chain hydrophobic group of a class of water-soluble Aqueous solution in the polymer, the hydrophobic groups and between the role as a result of hydrophobic aggregation occurred, so that large molecules have a molecular chain and inter-molecular Associating the critical mass fraction of the above, the formation of intermolecular association based supramolecular structure, increases the volume of fluid mechanics, it has good by In salt solution, because of the addition of small molecule electrolyte solution increased polarity, so that co-operation with enhanced hydrophobic association, shows that the nature of the Hydrophobically associating water-soluble polymer-based synthesis is difficult and not easily characterized, in part to hydrophobic chains connected to the water-soluble polymer, the general use of micellar copolymerization, or the use of the large surfactant monomer to copolymerization, polymer micelles need in the system by adding a large number of surface-active agent, which, after an increase of the complexity of the The use of the surface monomer copolymerization, the need for prior synthesis of large monomer, this technology also has considerable Author tetradecyl acrylate used as a hydrophobic monomer, the direct use of precipitation polymerization Preparation of hydrophobically associating polymer P (AM / TA) copolymers, so that the product of copolymerization and post-processing is more simple and easy And characterization of nitrogen determination Kedar copolymer composition, study the solution properties of copolymers of styrene-acrylic emulsion and of the 1 Experimental 1 Reagents Acrylamide (AM), the mass fraction of not less than 985 percent, according to documents provided by purification methods; N, N-dimethylformamide (DMF),分析纯; methanol, sodium chloride, chemical pure; acrylic 10 four acetate (TA), laboratory-made; styrene-acrylic emulsion resin from Fuzhou in Fujian Province L 2P (AM / TA) Copolymer Check that a certain amount of monomer AM and TA, using DMF dissolved into three-neck bottle, pass oxygen Warming to 80 ℃, reaction by adding initiator 4h, filtering, washing the product several times with methanol to remove unreacted 40 ℃ vacuum drying to constant 3 Analysis and Testing Determination of nitrogen Kedar will be the composition of Determination of intrinsic viscosity with copolymer solution viscosity [η], the test temperature (30 ± O1) ℃ Apparent viscosity of polymer solution with NDJ-I-type rotary viscometer 2 Results and Discussion 1 Dilute Solution Properties of Copolymers of different mole fraction of hydrophobic groups of the P (AM / TA) copolymers in distilled water, and w (NaCl) = 5% of the solution intrinsic viscosity [η] values listed in Table Polymer [η] is proportional to the solution of the fluid dynamics of macromolecular coil volume, which can respond to the convergence coil macromolecules, the degree of We can see from Table 1, with the copolymer chain of the TA increase in mole fraction, the aqueous solution of [η] value decreases in w (NaCl) = 5% of the solution is continued to This is because in dilute solution, the hydrophobic group to intramolecular association based association, with the mole fraction of the increase in TA, to enhance intramolecular association, resulting in the molecular chain In salt solution, because of the role of ionic charge, so that intramolecular hydrophobic chain to enter into force enhancement, molecular chain contraction, so [η] value continued to TA hydrophobic group 2 mole fraction of polymer solution viscosity on the impact of figures 1 and 2, respectively, P (AM / TA) series of copolymers and PAM in distilled water, and w (NaCl) = 5% in the apparent viscosity of the solution and the relationship between the mass fraction of polymer PAM solution viscosity with the increase of mass fraction of gentle rise, and the hydrophobic copolymer solution for the mass fraction of 3O% ~ 4O%, when a sharp increase in viscosity, indicating that aggregation of hydrophobic groups and lead to intermolecular association, forming a physical crosslinking网络 At this point the mass fraction of copolymer solution that is the critical mass fraction of the As shown in Figure 1, with the mole fraction of TA increased, the viscosity of copolymer solution increased When the mole fraction of hydrophobic groups is high, the solution viscosity increases with the mass fraction of the faster, the critical aggregation copolymer mass fraction As shown in Figure 2, by adding Nacl solution, the solution has greatly enhanced apparent viscosity, such as the mass fraction of O% for the P (AM / TA) -1 5 polymer solution at 20 ℃, rotation speed 6r/min , the viscosity of OmPs, and viscosity in aqueous solution only 374mPa TA different mole fraction of the mass fraction of polymer in water were
师说题目太旧的不要 写论文带，真的不知道怎么选了，求指教
例如：朱门酒肉臭，路有冻死骨。一人得道，鸡犬升天。衙门八字开，有理无钱莫进来。只许州官放火，不许百姓点灯。四、 风俗习惯不同的民族形成了各自独特的风俗习惯：正如英语中一句谚语所说的：“So many countries, so many ”在对狗的态度上，中国人脑海中狗如同鸡、鸭、猪一样是一种地位十分卑微的动物。常常把狗与“下贱”、“低微”、“无赖”等贬义词联系在一起，如“狼心狗肺”、“狗腿子”、“猪狗不如”、“狐朋狗党”等，[5]（P83）虽然狗也用作看家护院、狩猎、牧羊。狗还常被宰杀烹调，这在西方人看来是非常不能接受的。中国人对狗的态度在谚语中可以体现出来，如：狗眼看人低。 好狗不挡道。 狗嘴里吐不出象牙。 狗改不了吃屎。 痛打落水狗。而狗在西方人眼中不仅是狩猎、看门、工作的得力可靠的好帮手，更是生活中重要的伴侣和朋友，是抚慰人们寂寞空虚生活不可缺少的一部分，甚至将其视为家中的成员，与狗有着深厚的感情。在西方还有发生狗死后，为其安葬立碑的事。因此，狗的形象在英语谚语中是褒义的，人们对狗是怜爱、赞赏的。英语谚语之中，常常以狗的形象来比喻人的行为。如：You are a lucky 你是一个幸运儿。 Every dog has its 各人皆有出头之日。 Old dog will not learn new 老人学不了新东西。 Love me, love my 爱屋及乌。而英语中兔子常代表胆怯，但汉语中与“胆怯”相联系的动物形象则是老鼠。因此有谚语“气壮如牛，胆小如鼠”；英语民族常用狮子比喻力量、雄威，所以有谚语：March comes in like a lion and goes out like a 三月来如猛狮；去如羔羊。Every dog is a lion at 狗是百步王，只在门前狠。A lion may be beholden to a 老鼠也能帮狮子；弱者也能帮强者。这里因为狮子多产于非洲、印度等地，而英国历史上与这些地区或国家有着很深的关系。而我国不产狮子，无论南方北方都产老虎。[6]（P73）从前，老虎数量繁多，常出没山林，侵扰人民，甚至危害人命。人们认为虎为百兽之王，对虎十分敬畏，有“养虎为患”、“伴君如伴虎”的说法，把虎看作力量、威武、雄壮的象征，因此产生了许多关于与老虎有关的谚语。例如：山中无老虎，猴子称大王。 不入虎穴，焉得虎子。 虎毒不食子 初生牛犊不怕虎。五、 民族性格中西方由于各自生存环境的差异，以及人们对自身环境的不同应战，发展出各自不同的社会文明，从而产生了不同的文化取向、价值观念、性格特征。在古希腊，由于土地的贫瘠，海上通道的开辟，再加上频繁的战争和几次大规模的民族迁徙，使得他们很早就发展起商业经济，创造了人类最古老的商业文明。西方成了典型的商业社会，人们从事着频繁的商业活动，正所谓“The English are a nation of shop-”（英国全民皆商，外表富强）。经商的成效不在天地鬼神而在自己，在于自己的才干。[7]（P22-23）商场中的竞争激烈、优胜劣汰、你失我得，这形成了西方人个人意识较强、重视个人作用、个人独立自主、个人利益的个人主义思想。Self comes 自我利益是第一位的。Everyman for himself and God for us 个人为自己，上帝为大家。Near is my shirt, but nearer is my 自己的利益最切身。Self-preservation is the first law of 保存自己是自然界的第一法则。He who depends on another dines ill and sups 指望别人，难有好吃喝。而经商见效快、获利多、风险大，也养成了西方人急功近利、富于进取、敢于冒险的流动性格。If at first you don’t succeed, try, try, try Forbidden fruit is Catch as catch Discontent is the first step in Life is a battle from cradle to 人生是一场从摇篮到坟墓的战斗。Life, to be worthy of a rational being, must be always in 人生必须永远前进，才不愧为有理智的人。Fortune favors the 勇者天佑。个人主义思想使西方人重视突出个人，喜欢表现自己的个性，乐于标新立异，爱出风头，尊重个性、自我，并鼓励个性发展，对别人因个性表现出的任何形态都能够理解接受，这可以在谚语中体现出来。It’s squeaky wheel that gets the 吱吱叫的轮子先上油。Tastes 个人品位不同。Every man after his 个人追求个人的风格。 If you’ve got it, flaunt 这句谚语来源于一部The producer的美国电影。意思是如果你有钱、本事、美貌或性感，就应该让人瞧瞧。[8]（P334）而以农业为根本的中国人则截然不同，农业的收获往往不在耕种者，而是老天。人的意志如何强大也阻止不了干旱、洪水、风暴等天灾的来临。[7]（P23）另外农业见效慢，而一年一度的丰收来自于长期的扎扎实实、坚持不懈的努力劳动，这形成了中国人思想意识中安定保守、善于坚持忍耐、缺乏冒险、知足的性格的特质。[5]（P23）
一、英语专业文化方向的论文，要看那一个方向了。二、文化方向的论文资料，那一方面？三、你自己要有一个底，什么样的文化，最好是接近目前民生的，再从一个论点，展开讨论。四、决定那一个以文化背景为主题的。