产物
- 与 产物 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Photoreactions of 8 with 15-19, on the other hand, furnished the corresponding [2+2] cyclobutane products and the annulation products together.
二氯马来酰亚胺(8)与15—19的光化反应中则分别得到相应[2+2]的环丁烷产物和增环产物,在与19的反应中,还得到由环丁烷产物脱氯化氢后得到的环丁烯开环的二烯产物。
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The comonomer in the copolymer by cat247 is trend to isolated. A few amount of comonomer could make the melting point remarkably decreased and maintain the crystalline at a relative high level. This catalyst can be use to produce the material with low melting point and high intensity such as packing film with low hotsealing temperature. The copolymer by cat24 is characteristic of uniform comonomer distribution and low melting temperature and crystallinity. Therefore, this catalyst could be used to produce LLDPE and POE according the comonomer content; cat246 has a strong copolymerization ability, and the resultant polymer has relatively high blockiness. If this trend is strengthened by adjustment of polymerization condition, the polymer can be used as thermal plastic elastomer with random and crystalline blocks.
由于各个催化剂所产生的聚合物各具特点,所以其潜在的工业用途不同。cat247的产物中共单体趋于孤立分布,极少的共单体即可使熔点明显降低而结晶度仍保持较高水平,有利于制备低熔点、高强度的材料(如低热封温度的包装膜等)。cat24的催化聚合产物无规程度比较高,对降低熔点和结晶度都十分有效,通过控制产物中共单体含量的多少,可以生产LLDPE和POE;cat246共聚合能力强,且产物有嵌段倾向,通过调整聚合条件强化这一倾向后,可以用来生产具有无规-结晶嵌段结构的热塑性弹性体。
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The gasification efficiency increased and the molar fraction of H2 decreased with an increase in the reaction temperature. The decomposition of PVA was more complete at higher temperatures. At 24 MPa, 500℃ and 120 s, the TOC remove rate, the carbon gasification rate and the hydrogen gasification rate were up to 71.46%, 67.97% and 157.24% respectively. A change in the residence time had no significant effect on the molar fraction of gas production but an increase in the residence time could enhance the gasification efficiency of PVA. It was found that the intermediates were mainly alkane, cycloparaffin, aromatic hydrocarbons, and low-molecular weight acids. It was supposed that PVA was degraded into small molecules through breaking of C-C bonds. Parts of the molecules were converted into H2, CO, CH4 and CO2 while some was converted into aromatic hydrocarbons.
过程探索发现:反应温度的升高能提高PVA气化效率,但气体产物中H2的含量随反应温度的升高有所下降;随着反应温度的升高,PVA分解趋于彻底,在压力24MPa、温度500℃、停留时间120s的条件下,TOC去除率、有机碳气化率和氢气化率分别达到71.46%,67.97%和157.24%;停留时间的变化对气体产物含量没有明显的影响,但延长停留时间能提高PVA的气化效率;PVA气化反应中间产物主要为链状烷烃、环烷烃、芳香烃及小分子酸,根据中间产物出现的顺序推测PVA的降解为由C-C键断裂形成小分子物质,这些小分子物质一部分转化为H2,CO,CH4和CO2,一部分形成难降解的芳香族化合物。
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The reaction of benzoic acid and ethylenediamine was studied under different conditions.
在不同条件下考察了苯甲酸与乙二胺的反应,对反应产物、主要副产物及反应中间体进行了分离和鉴定,通过熔点测定、元素分析和红外光谱分析,确定了产物为2-苯基咪唑啉,主要副产物为二苯甲酰乙二胺,中间体之一为乙二胺与苯甲酸形成的双盐。
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It is included that 4-5 types of active sites exist in the catalytic system and the active site produced polymer with low molecular weight is easy to be activiated while TEA is used as the cocatalyst. While TIBA, the active site produced polymer with high molecular weight and seldom active site produced polymer with low one is prone to be activiated. MAO tends to activiate the active site produced polymer with middle-level molecular weight. In TEA-TIBA catalytic system, TEA and TIBA activiate the corresponding active site and the weight of every active site gradationally varied with the change of the ratio of the two cocatalysts. And the activity of the active site produced polymer with high molecular weight is proportion to the concentration of TIBA.
发现:TEA作为助催化剂时产生低分子量产物的活性中心易于活化,且体系中具有活性的活性中心有4~5种;TIBA易于活化产生高分子量的活性中心,基本上不能活化产生低分子量产物的活性中心;MAO对产生中等分子量产物的活性中心活化能力较强;在TEA-TIBA混合物体系中,TEA和TIBA各自对活性中心的作用表现为明显的互补现象,各活性中心的相对强度随着两种助催化剂之间的比例改变呈现渐次变化,其中产生高分子量产物的活性中心的相对活性(来源:c5AB3fC论文网www.abclunwen.com)与TIBA的浓度有明显的正相关性。
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In order to obtained the six-membered ring compound and a thorough assignment of the spectra, and further to prove that the six-membered ring compound was formed from the hydrogen transfer, the compound N-butyl-4-(N-methylphenylamino)-5-amino- 1, 8-naphthalimide 6 was designed to obtained with N-butyl-4-bromo-5-amino-1, 8-naphthalimide and N-methyl phenylamine as the starting material. However it was difficult to obtain the desired product as the different solvent giving the different products except the desired product.
为了能够得到六元环化合物作为定标的物质及其确切的谱图分析结果,并且为了进一步证明由五元环产物通过氢转移得到六元环产物的正确性,设计用N-丁基4-溴-5-氨基-1,8-萘酰亚胺与N-甲基苯胺反应生成N-丁基-4--5-氨基-1,8-萘酰亚胺6,结果发现这种方法很难实现,选择不同的溶剂会生成不同的产物,却都不是目标产物。
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To be different from the already chloromethylation catalyst, it has a certain amount of moisture wet, which will not produce huge amounts of doughtic cancerogenic chloromethyl methyl ether during and after the reaction.4,4\'-bisbiphenyl, 1,4-bisbenzene, 1,4-bis(chloro- methyl)-2,5-dimethylbenzene, 1,5-bis-2,4-dimethylbenzene, 4-(chlor- omethyl)-1,2-dimethylbenzene, 1,2-bis-4,5-dimethylbenzene, 5,8-bis-1,2,3,4-tetrahydronaphthalene, 3,3\',5-tris-4,4\'-bisbiphenyl and 3,3\', 5,5\'-tetrakis-4,4\'-bisbiphenyl were synth- esized by using this new catalyst. Results indicated that when the reaction temperature was 55~60℃, the reaction time was 12h, the catalyst which consists of the concentration of 80%H_2SO_4, HAc and Lewis acid, the amount of Lewis acid 0.15 mol(nLewis:nbiphenyl=1.5:1), yield of biphenyl chloromethylation product 4,4\'-bis(chrolomethylbiphenyl can reach a maximum 85%.
采用这种催化体系完成了4,4′-二氯甲基联苯、对二氯甲基苯、1,4-二氯甲基-2,5-二甲基苯、1,5-二氯甲基-2,4-二甲基苯、4-氯甲基-1,2-二甲基苯、1,2-二氯甲基-4,5-二甲基苯、5,8-二氯甲基-四氢萘、3,3',5-三氯甲基-4,4'-二甲基苯和3,3',5,5'-四氯甲基-4,4'-二甲基苯的合成,结果表明:在反应条件为:反应温度55~60℃,反应时间12h,选择80%H_2SO_4、冰醋酸和Lewis酸为催化剂,反应最佳反应Lewis酸用量是0.15mol(和原料比为1.5:1),反应效果最好,联苯氯甲基化产物(4,4′-二氯甲基联苯)收率为85%;在反应条件为:反应温度70℃,反应时间8h,80%H_2SO_4、冰醋酸和Lewis酸为催化剂,反应最佳反应Lewis酸用量是0.1mol(和原料比为1:1)时,反应效果最好,苯的氯甲基化产物收(来源:ABd0C论文eded网www.abclunwen.com)率为75%;在反应条件为:在反应条件为:反应温度40℃,反应时间10h,60%H_2SO_4和Lewis酸为催化剂,反应最佳反应Lewis酸用量是0.1mol(和原料比为1:1)时,反应效果最好,对二甲苯氯甲基化产物(1,4-二氯甲基-2,5-二甲基苯)收率为78.5%;在反应条件为:反应温度35℃,反应时间10h,60%H_2SO_4、冰醋酸和Lewis酸为催化剂,反应最佳反应Lewis酸用量是0.1mol(和原料比为1:1)时,反应效果最好,间二甲苯氯甲基化产物(1,5-二氯甲基-2,4-二甲基苯)收率为81.5%。
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During the stationary phase of fermentation, cell productivity was slightly reduced. MgSO_4 and tryptone have the positive effect on the product synthesis and cell growth respectively. Based on these conclusions, MgSO_4 and tryptone were added to the feed medium to enhance the production of polysialic acid. Variable feed rate policies were applied to the fed-batch fermentation process and the final biomass and polysialic acid production were both increased by 40 percent.
通过摇瓶实验研究了大肠杆菌发酵过程中菌体生长和产物合成的影响因素,结果表明:产物合成与菌体生长是相耦联的过程,菌体生长受到菌体代谢产物的抑制作用,聚唾液酸的合成不受代谢产物的抑制作用;发酵进入稳定期后菌体的生长和生产能力有所降低;硫酸镁和胰蛋白胨分别对产物合成和菌体生长有一定的促进作用。
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The PCR products were examined by agarose gel electrophoresis. The target gene fragments were purified by gel extraction kit and ligated to cloning vector pMD18-T. The recombinant vectors were transformed into host strain E. coli K802 by lithium chloride method, screened and identified with PCR and restrictive enzymatic digestion. Their sequences were confirmed by DNA sequencing.(2) sTWEAK1 gene was subcloned into expression vector pProEx HTb and transformed into E. coli BL21. sTWEAK2 gene was subcloned into expression vector pMAL-C2x and transformed into E. coli TB1. The recombinant vectors were screened and identified with PCR and restrictive enzymatic digestion. The recombinant fusion proteins were induced to express with IPTG, detected by coomassie brilliant blue-stained SDS-polyacrylamide gel electrophoresis , and confirmed by Western blot analysis.(3) The sTWEAK1 fusion protein was purified with Ni-NTA Spin Kit.(4) The biological activity was assayed on transformed and tumor cells by microplate photometer after crystal violet or sulfur rodamine B staining.(5) The contents of IL-8 in the supernatant of 1990 cell cultures were determined by ELISA.(6) The morphological changes of the sensitive cells were observed by light and transmission electron microscopies.(7) The cell cycle and apoptotic rate were assayed by flow cytometry in 1990 and M85 cells.(8) The effect of fusion proteins on induction of NF-κB in 1990 and LOVO cells was detected with Dual-Luciferase Reporter Assay system.(9) The TWEAK gene was subcloned into Adeno-X Viral DNA with pShuttle vector and transfected into HEK293 cells by lipofectamine method.
(1)本研究用RT-PCR方法,从人组织细胞总RNA中扩增可溶性TWEAK胞外区(sTWEAK1和sTWEAK2)的cDNA序列及全长编码序列,用琼脂糖凝胶电泳分析PCR产物,胶回收目的基因片段,连接到pMD18-T克隆载体中,转化大肠杆菌K802,PCR和酶切筛选阳性克隆,全自动DNA测序验证序列;(2)sTWEAK1和sTWEAK2分别亚克隆到pProEx HTb和pMAL-C2x表达载体中,分别转化大肠杆菌BL21和TB1,PCR筛选和酶切鉴定,阳性克隆用IPTG诱导表达,表达产物用SDS-PAGE分析和Western blot验证融合蛋白;(3)用NTA-Ni Spin试剂盒初步分离纯化sTWEAK1融合蛋白;(4)用体外培养的肿瘤细胞和正常对表达产物进行活性检测,贴壁细胞用结晶紫染色法,悬浮细胞用磺酰罗丹明B染色法,酶标仪检测OD值;(5)敏感细胞用ELISA法检测细胞培养上清中IL-8的含量;(6)用光镜和电镜观察敏感细胞死亡和细胞凋亡情况;(7)用流式细胞仪分析表达产物对敏感细胞凋亡率和细胞周期的影响;(8)用双荧光素酶报告基因检测法,测定表达产物对敏感细胞NF-κB的影响;(9)用pShuttle穿梭质粒将TWEAK重组到腺病毒载体上,用脂质体转染法转染HEK293细胞,PCR鉴定重组质粒。
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In this work, nanostructure samples of La1-xCaxMnO3(x=0.2、0.3、0.4、0.5)were prepared by hydrothermal-precipitation method . The structural characterization of the powder samples were done by X-ray diffraction. XRD patterns showed that all the samples ate single perovskite-type phase withoutother impurity or secondary phase. The shape and size of samples were performed on Scanning Electron Microscopy. SEM photographs investigated that temperature of hydrothermal effects the phase of samples and alkalinity of the reaction mixture by ΔTad-T curve measurement device at low magnetic fielded
本论文采用水热共沉淀退火法制备了La1-xCaxMnO3(x=0.2、0.3、0.4、0.5)系纳米结构,用X射线衍射仪确定产物为单相钙钛矿结构,无任何杂峰及第二相;用扫描电子显微镜与透射电子显微镜分析了产物的大小和形貌,发现水热温度对产物的形成起决定作用,随着温度的升高,产物由薄膜状向丝状转变,而溶液的碱度可控制产物的形貌和大小,当碱度为6.35mol/L,水热温度为240 C时,La0.6Ca0.4MnO3的主要形貌为纳米丝并有少量纳米颗粒,纳米丝平均直径为40nm;最后测量了粉末样品在低磁场(1.4T)下的磁热效应,发现水热共沉淀退火法制备样品的最大绝热温度明显高于球磨法制备样品的最大绝热温变。
- 推荐网络例句
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The split between the two groups can hardly be papered over.
这两个团体间的分歧难以掩饰。
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This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.
这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。
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The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.
聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力