查询词典 A.N.
- 与 A.N. 相关的网络例句 [注:此内容来源于网络,仅供参考]
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A one-year investigation on the N and P concentration and accumulation of Cyperus malaccensis in the wetlands of Minjiang River estuary showed that the N and P concentration of C.
对闽江河口湿地优势植物短叶茳芏N、P养分含量与积累量进行了1年的监测。
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The author analyzed total oxygen content, nitrogen content in steel made by typical process and the inclusion composition, change rule, morphology and distribution qualitatively and quantitatively by image analyzer, big sample electrolysis, SEM and energy spectrum analysis. The results showed that final inclusion form was small granule MnS, calcium aluminate, a small quantity of silicate and lumpy Al2O3. By intensifying deoxidation alloying process control in converter, argon blowing and slagging control and desulphuration and calcium reduction operation in refining course and overall-protection casting, the oxygen content was reduced by 20% above averagely, nitrogen content was reduced by about 10% and the inclusion content was reduced by 30%.
通过全O、N分析,夹杂物图像分析仪、大样电解、扫描电镜及能谱分析,定性和定量分析了典型工艺钢种钢中全O、N含量和工序过程夹杂物的构成、变化规律及形态、分布,分析钢中最终夹杂物表现形式主要为小颗粒的MnS、铝酸钙、少量的硅酸盐和块状Al2O3,通过强化转炉脱氧合金化工艺控制、精炼过程吹氩与造渣控制及脱硫和钙处理操作、全程保护浇注,钢水中O含量平均降低20%以上,N含量降低10%左右,铸坯中夹杂物含量降低了30%。
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We have investigated the conformational features of four short peptide fragments of Staphylococcal nuclease by homonuclear two-dimensional NMR and circular dichroism with a view to examining the early events in the folding process of SNase.
中文题名金黄色葡萄球菌核酸酶折叠起始位点:N-末端短肽段的NMR研究副题名外文题名 Folding initiation sites of staphylococcal nuclease:exploring the solution conformation of N-terminal fragments by nuclear magnetic resonance 论文作者戴继勋导师王金凤研究员学科专业分子生物学研究领域\研究方向学位级别博士学位授予单位中国科学院生物物理研究所学位授予日期2001 论文页码总数68页关键词金黄色葡萄球菌核酸酶蛋白质折叠核磁共振馆藏号BSLW /2001 /Q71 /89 本论文工作用四个金黄色葡萄球菌核酸酶N-末端短片段作为新生肽链折叠的模型,用同核二维核磁共振谱和远紫外圆二色谱研究了它们的溶液构象特征。
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On the other hand, N-acylsalicylhydrazidate which contains several donor atoms is a strong chelating agent and is particularly well suited for the preparation of multinuclear complexes, In this paper, two N-acylsalicylhydrazidate ligands and six relevant complexes were synthesized.
本学位论文中,作者以水杨酰肼为原料合成了两个N-取代水杨酰肼配体和六个金属配合物。
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Prove that if n is not a square then it has an even numble of divisors.
证明:若n不是完全平方数,则n有偶数个因数。
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In this dissertation, electrophilic reactions of Nitrosonium with imines, aza-Diels-Alder reactions of N-arylimines with a variety of electron rich olefinic compounds induced by NO~+, and photoreactions of N-nitrosodiphenylamine with aromatic amines were studied.
本文研究了:(1)NO~+与亚胺双健发生的亲电反应;(2)NO~+引发的芳香亚胺和富电子碳碳双键作为亲二烯体的氮杂Diels-Alder反应,高选择性地得到了一系列四氢喹啉的衍生物;(3)N—亚硝基二苯胺与芳香胺发生光化学反应得到了一系列偶氮苯类化合物。
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The structure analysis indicates that the reverse symmetry ligand H4LB molecules are linked into a 2D supermolecular network by two types of hydrogen bonds. One type occurs between the oxalamide oxygen group and the phenol hydroxyl qroup of the nearest molecule with d=2.906(2) and ∠O-H…O=151.8°. The other type is between the oxalamide nitrogen group and the oxalamide oxygen group of anther molecule with d=2.849(2),∠N-H…O=158.7°.
晶体结构研究表明配体H4L为顺式桥联分子,晶体中存在两种氢键,一种是草酰胺基团的O原子与苯环上的酚羟基形成O-H…O氢键[d=2.906(2),∠O-H…O=151.8°];另一种是草酰胺基团的氨基与相邻草酰胺基上的O原子形成N-H…O氢键[d=2.849(2),∠N-H…O=158.7°],通过上述两种氢键将化合物H4LB连接成二维网络结构。
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The invention is characterized in that phthalide of general formula, wherein n and X have the meaning cited in the description, is reacted with nitrogen heterocycles of general formula: H-Z, wherein Z has the meaning cited in the description, or with nitrogen heterocycle metal salts of general formula in the presence of an aprotic polar diluent and optionally in the presence of a basic auxiliary reaction agent.
本发明涉及制备通式的2-杂环基甲基苯甲酸衍生物的新的方法,其中n、X和Z具有说明书中给出的意义,该方法提供高收率和高纯度,其特征是,通式的2-苯并呋喃酮,其中n和x具有说明书中给出的含义,与通式的氮杂环:H-Z,其中Z具有说明书中给出的意义,或与通式的氮杂环的金属盐在质子惰性极性稀释剂中并任选在碱性反应助剂存在下反应。
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Third, we studied the N-alkylation of phthalimide, indole, benzimidazole, succinimide with a variety of halogen in ionic liquid [BF4], [PF_6]. The present method has many obvious advantages, compared to those reported in the literature, including the generality, simplicity of the methodology, the ease of product isolation, the higher yield and potential for recycling of ionic liquids.
第三、研究了离子液体[BF_4]、[PF_6]和BF_4促进邻苯二甲酰亚胺、吲哚、苯并咪唑、丁二酰亚胺的N-烷基化反应,克服了传统溶剂中进行N-烷基化反应要求强碱、反应条件苛刻、时间长、产率一般的不足,改善了反应条件、提高了产率。
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On the basis of these principles and requirements,in this paper,a new modifier has been synthesized from pyromellitic dianhydride and thiosemicarbazide by the nucleophilic addition of anhydride,the cyclization of acyl thiosemicarbazide in alkaline solution,and the N-hydroxymethylation of the triazole-thione.
本文根据这一思路,以均苯四甲酸二酐和氨基硫脲为起始原料,通过酸酐的亲核加成反应、酰氨基硫脲的碱性环化反应、三唑硫酮环的N-羟甲基化反应合成出了一种新的N-羟甲基三唑硫酮酸改性剂。
- 相关中文对照歌词
- A.N.T.S.
- C.A.N.C.E.R
- B.A.N. (The Love Song)
- A.N.G.E.L.
- G-A-N-G-S-T-E-R
- W-O-M-A-N
- S.A.N.T.A.N.A.
- S.C.A.N.D.A.L.
- S.A.N.T.A.N.A.
- Keep It G.A.N.G.S.T.A.
- 推荐网络例句
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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.
随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。
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But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.
不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。
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Closes the eye, the deep breathing, all no longer are the dreams as if......
关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。