亚氨基的
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Amino to acetyl phenol, in have technology of two kinds of production domestic and internationally, acetic anhydride craft of the United States, acyl changes temperature to have 75 ℃ only, acyl changes mother liquor not apply mechanically, deputy reaction is little, of production thick tasting is kind of white almost, purificatory craft is very simple, activated carbon dosage only 2~3%, the Kun that its product does not have glow material almost in different third alcohol inferior the sealed impurity of amine impurity and minim, settleclear lightness it may not be a bad idea, the product quality that acetic anhydride craft produces is good, but close rate low, cost is high.
对乙酰氨基酚,在国内外有两种生产工艺,美国的醋酐工艺,酰化温度只有75℃,酰化母液不套用,副反应少,生产的粗品几乎是类白色,精制工艺就非常简单,活性炭用量仅2~3%,其产品在异丙醇中几乎无红光物质的醌亚胺杂质及微量的未知杂质,澄明度也好,醋酐工艺生产的产品质量好,但收率低、成本高。
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Moreover, the effects of the molar ratios of the reagents on the yield are examined. The best molar ratios are a 2.0 molar equivalence of thionyl chloride and a 3.0 molar equivalence of paminophenol to retinoic acid, and the total yield is 80.7%.
此外,研究了反应试剂的摩尔比对反应收率的影响,最佳摩尔比为二氯亚砜和对氨基苯酚物质的量分别是维甲酸物质的量的2倍和3倍,总收率为80.7%。
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The effects of imidization method,coagulation bath and temperature were studied on the structure and separation performance of polyimide membrane,prepared by using pyromellitic dianhidride and 4,4′-oxydianiline as raw materials.
针对以均苯四甲酸二酐和4, 4′-二氨基二苯醚为原料合成聚酰亚胺的过程,研究了亚胺化方法、凝胶浴组成与温度等条件对膜的结构和分离性能的影响。
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With stannous octanoate as the catalyst and 4,4'-diaminodiphenylsulfone as the curing agent, we studied the influence of reaction conditions and the molar ratio of resin and diphenylsilandiol on the heat resistance of modified products.
以辛酸亚锡作催化剂、4,4'-二氨基二苯基砜为固化剂,研究了反应条件和E-44与二苯基硅二醇的物质的量配比对改性产物耐热性能的影响。
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The antibody was chemically conjugated onto the microspheres through the reaction between primary amino groups and the succinimide ester groups due to their high reactivity.
而琥珀酰亚胺酯基由于其与生物分子上的伯氨基具有高反应活性,条件温和,反应速度快,是一种很好的固定生物分子的功能基。
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Two types of haptens, the earboxylated propyl amino derivative of the acid moiety (HCA1) that is the hydrolyzed product of cyhalothrin, and the carboxylated ethyl carbonyl derivative of the alcohol moiety (HCB2) were synthesized, and conjugated with the carrier proteins bovine serum albumin and ovalbumin respectively by the active ester method and the mixed anhydride method. The polyclonal antibodies were obtained after immuning to the New Zealand rabbits.
通过对氯氟氰菊酯分子结构中的酸部分接4-氨基丁酸(HCA1)和醇部分接丁二酸酐(HCB2),合成两种不同的半抗原,并通过碳二亚胺法将HCA1和HCB2分别与牛血清蛋白偶联制备了人工抗原HCA1-BSA和HCB2-BSA,通过活泼酯法将HCA1、HCAS和HCB2分别与卵清蛋白偶联制备包被抗原,两种人工抗原通过免疫新西兰大白兔来制备相应的多克隆抗体。
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The structures were identified by IR, UV,〓 NMR and element analyses. 2. Free radical 4-hydroxy-2,2,6,6-tetramethyl-1-piperidinyloxyl as catalyst, the phase transfer catalyzed method of oxidation eighteen semicarbazides to N-Aryl-2-Phenyl diazenecarboxamide with a solution of potassium ferricyanide in 2N aqueous sodium hydroxide and dichloromethane is described for the first time.
利用2,2,6,6-四甲基-4-羟基-1-哌啶氮氧自由基为相转移催化剂,在饱和铁氰化钾的2N氢氧化钠溶液与二氯甲烷的两相反应液中,催化氧化十八个取代氨基脲得到十八个相应的新型偶氮化合物N,2-二芳基二氮亚烯甲酰胺,均获得了较高的产率。
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Three composites of the different fibers with epoxy resin matrix are prepared and the corresponding unilateral fiber reinforced winding ring specimens are fabricated. The mechanical poperties of the composites including tensile strength, modulus and three point interlaminar shear strength are tested.
据文献 [2 ]介绍,PBO(聚对亚苯基苯并双口恶唑)是含杂环的苯氮聚合物的一种,它是采用二氨基间苯二酚和对苯二甲酸在多磷酸中聚合、采用空气间隙湿法纺丝法进行纺丝而制得的。
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And then re-use the nitroso muscle strain mutagenesis, in order to collect acid analog of GABA as a selection factor has been a 18% increase in production of new strains 42,, this new high-yield flask under the conditions of strain in the process were studied.
然后又对该菌株再采用亚硝基肌诱变,以撷氨酸结构类似物氨基丁酸作为筛选因子又得到一株新的产量提高18%的菌株42,,对此新的高产菌株在摇瓶条件下的工艺进行了研究。
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METHODS: Using CB-HRP as tracer while using sodium tungstate as stabilizer of TMP to antrograde tracing the projection of optic nerve fibers on anterior region of hypothalamus and retrograde tracing the distribution of hypoglossal nerve fibers on the dorsal side of medulla.
采用结合了霍乱毒素亚单位B的辣根过氧化物酶作为示踪剂,用钨酸钠作为四氨基联苯胺显色剂的稳定剂,顺行追踪视神经纤维向下丘脑前区的投射;逆行追踪舌下神经纤维在延髓背侧的分布。
- 推荐网络例句
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But we don't care about Battlegrounds.
但我们并不在乎沙场中的显露。
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Ah! don't mention it, the butcher's shop is a horror.
啊!不用提了。提到肉,真是糟透了。
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Tristan, I have nowhere to send this letter and no reason to believe you wish to receive it.
Tristan ,我不知道把这信寄到哪里,也不知道你是否想收到它。