二分子的
- 与 二分子的 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The 28S rDNA molecular phylogenetic trees showed: 1 entoprocts and phylactolaemate ectoprocts constituted a sister group, strenghthening the opinion that entoprocts should be reunited into phylum Bryozoa; 2 the cheilostome gymnolaemates was obviously non-monophyletic; 3 bryozoans itself was polyphyletic beyond any doubt, its main lineages were scattered in different positions of the lophotrochozoan trees; 4 to our great interests, the phylogenetic position of cheilostomes was between the diploblastic and the triploblastic, indicating they may play an important role during the evolution route from the diplobastic to the triploblastic animals.
28S rDNA分子系统树显示,内肛动物和被唇类外肛动物聚在一起并互为姐妹群,支持将内肛动物重新归入苔藓动物门的结论;唇口目裸唇类外肛动物绝非单系发生;苔藓动物本身也不是单系发生的,其主要类群分别位于触手冠担轮动物系统树的不同位置,特别是,唇口目苔藓动物的系统地位介于二胚层动物和其它三胚层动物之间,可能是二胚层动物向三胚层动物演化过程中的一个关键类群。
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The strong infraction between cellulous and casein exists in the blendmembrane. The membranes with various pore size were successfully prepared bycoagulating the mixture solution of cellulose cuoxam and PEG as pore former.
在膜形成过程,较低分子量的PEG(PEG400,PEG2000)具有较高的扩散速度和碰撞频率而易形成较大的&二次粒子&,导致形成较大的孔尺寸,其孔径约为PEG分子线团直径的二倍。
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There are two positive results, proton and sodium that has been reported previously, and three candidates including succinate, phosphate and melibiose that was found in this study.
根据节点连结度的分析,找到了五个候选协同输送系统中的中心小分子,其中两个为已知的阳性资料,氢离子与钠离子,其余三个分别为琥珀酸盐,磷酸,蜜二糖,其中以蜜二糖为中心的输送系统只有一个,并不符合本篇所定义的协同输送系统,故舍弃之。
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The first part is to synthesize 5-formyl -8- quinolinol from 8-uinolinol and chloroform , using ethanol as a solvent. Then analysizing the 5-formyl-8-quinolinol by IR. The second part is , according to ideas of molecule designing, to synthesize the new self-assembly Inorganic-Organic coordination polymers Co(u2-bpyV2O6,(C4H4N2)Ni2(H2O)2-V4Ol2,(Cl2Hl2N2)Co-V2O6 using Cu, Ni, and Co as templating, 4-cyano-pyridine(4-CNPy), 4,4-bipyridine,pyrazine, l,2-bis(4-pyridyl)ethane, 5-formyl -8- quinolinol as building blocks and Ammonium Metavanadate (NH4VO3) as subordinate building blocks by Hydrothermal , analysizing their content of element determining their structures by X-Ray diffraction.
本课题实验分为两部分:一是配体的合成,以8-羟基喹啉、三氯甲烷为原料,以乙醇为溶剂,合成了5—甲醛基—8羟基喹啉并且对其进行了IR的分析测定;二是配位聚合物的合成,通过分子设计,采用溶剂热法以Cu、Ni、Co为中心离子,以5—甲醛基—8羟基喹啉、4,4-联吡啶、吡嗪、1,2-二吡啶基乙烷为配体,以偏钒酸根(VO_3~-)为辅助配体,通过水热法自组装合成了新的3-D网状结构配位聚合物Co(μ_2-bpy)V_2O_6,(C_4H_4N_2)Ni_2(H_2O)_2·V_4O_(12),C_(12H_(12)N_2Co·V_2O_6,并对其进行了元素分析和晶体结构的测定。
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By use of titration analysis, the thesis investigated various factors such as isocyanate, PE molecular weight, reacting substance molecular ratio, reacting temperature and time etc. influencing upon prepolymerization step. It was found that 2, 4-tolulene diisocyanate and 4, 4'diphenylmethane diisocyanate is more rapidly reacted with PE600 than HDI. With PE molecular weight increasing, the reacting temperature or time should be raised or extended relevantly. Thus PE2000+2HDI pre-polymerization should be better carried out under some catalyst, for example, Triethylene diamine , Dibutyltin dilaurate and Tin octoate were used.
首先采用滴定分析方法对WRPU预聚反应的影响因素进行了研究:芳香族二异氰酸酯TDI、MDI比脂肪族二异氰酸酯HDI反应活性高,其中TDI在反应初始阶段的反应速率比MDI快,不过随着反应的进行,MDI比TDI反应速率加快,这主要是因为TDI分子中的两个-NCO反应活性差异大所致;二元醇分子量越大,反应速度越慢;聚醚二元醇比聚酯二元醇的反应速度快;当分子量超过2000的二元醇与HDI进行预聚反应时,需借助适当的催化剂来加快反应速度,从而使预聚反应能够顺利进行,分别选择DABCO、TOA和DBDTL三种催化剂进行催化反应,发现不同的催化剂,其催化效果相差较大。
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The reaction of cyclic b-keto esters with CF3CO2ZnCH2I provides the corresponding ring-expanded products with the advantage of mild condition in moderate to good yields. A simple and efficient procedure has been developed for a variety of 1,3-diketones converted into the corresponding 1,4-diketones and trans-1,2-disubstituted cyclopropanols in high yields. In conclusion, this new type of organozinc reagents has been developed for many useful reaction in organic synthesis.
利用有机锌试剂所具有的双重特性,在新型的Baylis-Hillman反应中,可以直接与炔基酮和醛反应一锅制得多官能团的三取代的顺式烯;在b-酮酯化合物的扩环反应中,取得了重要进展,得到了增加一个碳的扩环产物,&一步法&合成,反应条件温和、环境友好;在1,3-二酮分子中成功地插入1个碳,合成出1,4-二酮和环丙醇,为现代有机合成提供了新的合成方法,具有良好的应用前景。
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The results showed that the LUMO values are -3.19eV for organic oxadiazole,-3.16eV for macromolecular oxadiazole and -3.21eV for Poly(1,3,4-oxadiazole) and their HOMO values are all under -6.0eV, hinting that they show good hole-blocking characteristics.
利用循环伏安法测定了三种不同类型衍生物的带隙和HOMO、LUMO能级,噁二唑类小分子、大分子、聚合物衍生物的LUMO能级分别为-3.19eV、-3.16eV、-3.21eV,有利于电子的注入,三种噁二唑衍生物的HOMO能级都在-6.0eV以下,对空穴也有很好的阻挡作用。
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A novel bis (o-aminobenzophenone) s monomer is synthesized, and is used to get three different polyquinolines containing phenylamine moiety through Frieldlander reaction. The solubilities, thermal stabilities and luminescent properties of the polymers were evaluated. All the polymers are thermal-stable, and are soluble in common organic solvents. The emission of their thin film is from excimer emission.
合成了一种新型的二邻氨基二苯酮单体,通过Frieldlander反应,可以构造出不同结构的含有类三芳胺基元的发光聚喹啉,对其溶解性、热性能进行了研究,结果表明这类聚喹啉在常用有机溶剂中的溶解性有了很大提高,同时保持了聚喹啉较高的热稳定性;研究了它们在溶液态和薄膜态的紫外可见吸收光谱和荧光发射光谱,发现它们在薄膜态下的荧光发射主要来自于分子间激基复合物发射。
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It is an effective way to use the appropriate narrow bandgap nanosize semiconductors that is stable in chemical and biochemical conditions and not pollute the surroundings in reaction, which sensitizes nanocrysalline titanium dioxide carriers synchronously to prompt the utilization of the solar spectra and the efficiency of photocatalysis.
利用染料分子作表面敏化半导体材料和利用杂质掺杂来实现宽禁带半导体吸收光谱的扩展有一定的局限性,采用化学和生物惰性且对环境不产生二次污染的窄禁带半导体敏化同时考虑团簇颗粒粒径对载体性能的影响,是提高纳米二氧化钛光催化剂对阳光的吸收利用率和量子效率的有效方法。
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Octacosanol through the molecular distillation technology and high-vacuum separation technology at bee wax and rice bran extract, octacosanol the treatment of excessive calcium osteoporosis, treatment of high cholesterol and high LDL blood type as well as to promote blood and activation of cell cycle, and enhance endurance, energy and stamina, and many other physiological functions; taurine are the first in 1827 at the Ox bile found in a special amino acid, commonly found in natural biology of the human body in vivo an essential nutritional elements, known as "the fulcrum of the body's health balance."
二十八烷醇是通过分子蒸馏技术和高真空分离技术在蜂腊和米糠中提取,二十八烷醇对治疗血钙过多的骨质疏松,治疗高胆固醇和高脂蛋白血型以及促进血液循环和活化细胞,增强耐力、精力和体力等众多的生理功能;牛磺酸是1827年首先在牛的胆汁中发现的一种特殊氨基酸,普遍存在于自然界的生物体内人体内一种必不可少的营养元素,被誉为&人体平衡的健康支点&。
- 推荐网络例句
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For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether
年美国个人破产法的一个改动使得破产登记急速下降,而后引起了信用卡大规模的亏损。
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Eph. 4:23 And that you be renewed in the spirit of your mind
弗四23 而在你们心思的灵里得以更新
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Lao Qiu is the Chairman of China Qiuyang Translation Group and the head master of the Confucius School. He has committed himself to the research and promotion of the classics of China.
老秋先生为中国秋阳翻译集团的董事长和孔子商学院的院长,致力于国学的研究和推广。