萘并
- 与 萘并 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 research result shows that the flowability, moldability, cohesiveness of high performance concrete of hill sand are significant by comparison with ordinary concrete on mechanical properties, long term properties, and durability. Motar flowability decreases with the increase of single-mixed active additive. The flowability can be largely improved by double mixing of active additive and super plasticizer NF. This is because not only the active additive has filling effect but also the dispersing effect induced by surface action between additive and super plasticizer NF. And the optimal content of materials are: super plasticizer NF≥0.8%, fly ash 20%, PS 20~30%,zeolite powder≤20%,SF 5~8%; The negative influence of hill sand powder should be avoided by controlling of powder content and the use of active additive and super
研究表明:随着单掺活性掺合料掺量的增加,砂浆流动性减小,活性掺合料与萘系高效减水剂NF双掺使用,比使用同样剂量萘系高效减水剂NF的基准浆体流动性明显增大,这是由于玻璃体材质活性掺合料不仅有填充效应,更主要的是它与高效减水剂之间的表面物化作用产生了分散性,而活性掺合料对浆体的流化作用效果主要是依赖于其分散性;能有效改善胶砂流动性的适宜掺量为:萘系高效减水剂不小于0.8%,粉煤灰掺量为20%,PS掺量为20~30%,沸石矿粉掺量不宜大于20%,SF掺量为5~8%;通过对粉末含量的限制,并借助活性掺合料、高效减水剂的合理使用,就可以避免山砂粉末含量的负面影响,配制出密实度高,抗渗性能优异,具有良好的耐久性能,并具有良好的体积稳定性的山砂高性能混凝土。
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Approved the substitution effect of 2, 2-diphenylnaphthalinspyran on the phenyl ring, and clarified the property of the compound is not determined only by the pyran planarity and C-O bond, it not only changed the theoretic basis, but also provide a way to find materials with new properties.
经单晶分析证实了2,2-二苯基萘并吡喃的苯基上取代基的种类及其位置对光致变色性质的重要影响,改变了只有吡喃平面性及其C-O影响性质的观点,不仅改变了理论依据,还指导有望开发出新性质材料的方向。
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By bioactivity-guided isolation, 14 compounds were obtained from the active fractions. 13 of them were determined as 9,9'-dihydroxy-8,8'-dimethoxy- l,r-methyl-lH,lH'-[4,4']binaphtha
本研究利用稻瘟霉筛选体系对红葱的60%乙醇提取物及其氯仿、正丁醇和水的萃取部分进行了活性筛选,并对活性部位的活性化学成分进行了跟踪分离,从中分离得到十四个化合物,利用物理化学和光谱学的方法对其中十三个化合物的结构进行了鉴定,分别为9,9'-二羟基-8,8'-二甲氧基-1,1'-二甲基-1H,1H'-[4,4']双萘并
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The second part focus on the synthesis of 4-(benzothiazol-2-yl)naphtho [1,2-d]oxzole derivatives.
第二部分是4-苯并噻唑基-[1,2-d]萘并噁唑衍生物的合成。
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The third part is the spectroscopy of the 4-(benzothiazol-2-yl)naphtho[1,2-d]oxzole derivatives.
第三部分是4-苯并噻唑基-[1,2-d]萘并噁唑衍生物光谱性质的研究。
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Non-doped red-emitting electrofluorescent single-layer organic light-emitting devices based on an ambipolar small molecule, 4, 9-bis 4-(2, 2-diphenylvinyl phenyl naphtho[2, 3-c][1, 2, 5] thiadiazole, were studied.
以双极性小分子4, 9-二(4-(2, 2-二苯乙烯基)苯基)萘并[2, 3-c][1, 2, 5]噻二唑为发光层,制备得到了单层非掺杂红色荧光有机发光二极管。
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Organic fluorescent compound;(benzothiazol-2-yl)naphtho[1; 2-d]oxzole derivatives; UV spectroscopy; Fluorescent spectroscopy; Quantum yield
工程科技I,化学,有机化学有机荧光化合物;苯并噻唑基-萘并噁唑衍生物;紫外光谱;荧光光谱;量子产率
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In a DMF solution of CuCl〓-ethanolamine-acetic acid (1: 2: 2), 27 formed a highly oxidized heterocyclic compound 2-hydroxymethyl-naphtho [1, 2-a] oxazole (30) by the carbon-nitrogen coupling and carbon-oxygen coupling with the ligand of ethanolamine, which brings a chance to develop a novel approach to this heterocyclic compound via one-pot reaction of phenols under mild condition.
在氯化铜—乙醇胺—乙酸(1:2:2)的DMF溶液中,27与配体乙醇胺发生碳氮偶合与碳氧偶合,生成深度氧化的杂环化合物:2-羟甲基-萘并[1,2-a]〓唑(30)。这可望为酚类一锅化直接转化为30及其类似物提供一种简便的新合成路线。
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We have presented a practical method for the preparation of propargylic alcohols from terminal alkynes and carbonyl compounds promoted by KOH in the presence of 18-crown-6,and subsequent efficient cyclizations of propargylic alcohols with 2-naphthol catalyzed by InCl_3·4H_2O under the solvent-free ball-milling conditions.Ball milling exhibits its superiority over the reported methods in the preparation of propargylic alcohols and naphthopyran derivatives.
采用机械研磨方法进行了连续的两步固相化学反应的研究:首先,在氢氧化钾和18-冠-6的作用下,端基炔和羰基化合物在机械研磨条件下反应可以高效地生成相应的炔醇化合物;其次,在四水合三氯化铟的催化作用下,生成的炔醇化合物和2-萘酚在机械研磨条件下环加成生成相应的萘并吡喃产物。
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Which are consistent to the source rocks relating to evaporite depositional environment within the lower part of Xingouzui Formation and the upper part of Shashi Formation in the study area.
对江汉盆地西南缘12个原油样品中含硫化合物分布特征的研究表明,原油中二苯并噻吩系列化合物和苯并萘并噻吩系列化合物分别占芳烃总量的4.61%~9.79%和0.27%~1.32%,与烃源岩中含硫化合物的含量一致,反映原油中含硫化合物的含量与沉积环境有关。
- 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