磷
- 与 磷 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 phosphorus oxychloride or phosphorus tribromide N, N-dimethylformamide mix and react to form the Vilsmeier reagent used in the reaction. The newly prepared Vilsmeier reagent is added into the reaction bottle provided with the return condenser and the blender; a reaction raw material N, N-dimethylformamide solution expressed in the reaction formula is added into the system; the temperature is risen; the corresponding multi substituting pyridine-2 (1 H)-ketone compound can be made after the column chromatography of the silica gel; the production rate is between 60 and 95 percent according to different reactions.
由三氯氧磷或三溴化磷N,N-二甲基甲酰胺混合获得反应中所用Vilsmeier试剂;将新配制的Vilsmeier试剂加入装有回流冷凝管、搅拌器的反应瓶中,向体系中加入反应通式中表示的一种反应原料的N,N-二甲基甲酰胺溶液,升温,经硅胶柱层析分离得相应的多取代吡啶-2(1H)-酮类化合物,产率视不同反应在60~95%之间。
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Mono dodecyl phosphate is synthesized using trichloro phosphate and di dodecyl phosphate is synthesized using phosphorous pentoxide. The structures are confirmed by IR and contents are analyzed by GC and HPLC. Mixed esters with different mass ratios of mono and di esters are prepared.
分别以三氯氧磷为磷酸化剂,合成并提纯了正十二烷基磷酸单酯,以五氧化二磷为磷酸化剂,合成并提纯正十二烷基磷酸双酯,其结构通过质谱得到了确证,产品组成采用气相色谱和高效液相色谱得到了确定。
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Was founded in 1993, after reorganization of assets in 2003 as "phosphide", more than 500 million fixed assets, the existing 150 staff, of whom technical staff of more than 20, are specializing in the production of phosphate (sodium pyrophosphate, disodium hydrogen phosphate, sodium hexametaphosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, trisodium phosphate) enterprise.
河南省焦作市磷化实业有限公司(原武陟县兴璋化工有限公司)建于1993年,后经2003年资产重组为&磷化&,公司固定资产500多万,现有职工150人,其中技术人员20多名,是专业生产磷酸盐(焦磷酸钠,磷酸氢二钠,六偏磷酸钠,磷酸二氢钾,磷酸氢二钠,磷酸三钠)企业。
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Molybdophopsphoric Acid Catalysis in the Oxidative Cleavage of Olefins by the Hydrogen Peroxide Oxidative cleavage of the double bond could be catalyzed by H_3PMo_(12)O_(40) using H_2O_2 as oxidant, various trisubstituted olefins were oxidized to aldehydes or ketones in high yields. The system was not satisfied for electron-deficient olefins such as trans-(2-nitrovinyl) benzol or chalcone. The reaction of aliphatic olefins did not occur under the same conditions.
二、磷钼酸催化过氧化氢对烯烃的氧化断裂反应用过氧化氢(30%)作为氧化剂,磷钼酸可以催化氧化碳碳双键的断裂反应,三取代的烯烃被氧化生成醛或酮,产率较高;此体系对于缺电子烯烃如查尔酮,不饱和硝基化合物的断裂反应效果较差,脂肪族烯烃在此体系下的氧化并不发生。
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Potato is a kind of potassium crop, which has great demand for nitrogen and potassium. The demand of phosphorus is little, yet it could promote the vegetative growth, tuberization and starch accumulation.
马铃薯是喜钾作物,对氮、钾需求量较大,对磷需求量虽然较少,但磷可促进营养生长和块茎形成以及淀粉积累。
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The content of soil ulmin,and the entire nitrogen have slightly rise; compares to 20 years ago , the average content of soil effective phosphorus has slightly increased,but the condition that the soil lack of the phosphorus is still obviously;Athough the content of fast-acting potassium has slightly down,it still stand in a low level,so the soil can't satisfies the needs of the plant normal live.
土壤有机质、全氮含量略有上升;土壤有效磷平均含量比20年前略增加,但缺磷状况仍十分明显;速效钾含量略有下降,仍处于较低水平,不能满足作物正常生长的需要。
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The 0-40cm soil layer soil mean value looked that mixes by the interlacing broadcasts the lawn soil ulmin, the alkaline hydrolysis nitrogen content to be highest; The fast-acting phosphorus, the fast-acting potassium are highest by the unicast awnless brome lawn content; The colleague mixes broadcasts lawn pH to be biggest.
不同播种方式下土壤有机质、碱解氮、速效磷含量在0-40cm各土层内呈现随着土层深度的增加而降低的趋势,均以0-10 cm土层土壤含量为最大;同行混播和隔行混播草地速效钾呈现降低的变化趋势,单播无芒雀麦草地则呈现先降后增再降的变化趋势,以0-10 cm和20-30 cm土层土壤含量为最大,均为80,并与其它土层间达到极显著差异;pH则呈现出增加趋势。0-40cm土层土壤平均值来看以隔行混播草地土壤有机质、碱解氮含量最高;速效磷、速效钾以单播无芒雀麦草地含量最高;同行混播草地pH最大。
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The compound 3, 9-bis (2', 4', 6'-tribromophoxy)-2, 4, 8, 10-traoxa -3, 9-dip- hosphospiro [5.5] undecane -3, 9-dioxide (HFR-1) was prepared with pentaeryth- ritol, phosphorus oxychloride and 2, 4, 6-tribromophenoxy soldium by esterifica- tion and condensation reaction.
以三溴苯酚钠、三氯氧磷、季戊四醇为原料,通过酯化和缩合两步反应合成了阻燃剂3,9-双(2',4',6'三溴苯氧基)-2,4,8,10-四氧代-3,9-二磷螺环-3,9-二氧[5.5]十一烷。
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The results showed that inoculated PSB can improve plant growth and promote plants uptake and utilize more undissolving P. It also decrease pH of the medium and increase microbe population.
研究表明,加入解磷细菌后,对粉煤灰基质有一定的改良作用,促进了植物生长,增加了对粉煤灰中难溶性磷的吸收利用,降低了粉煤灰pH,增加了根际细菌和真菌的数量。
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Without VAM, the soybean could not effectively utilize the added P, and yields of the uninoculated soybean, even with added P, were significantly less than inoculated plants with no P additions.
未接种的大豆的产量甚至在施磷之后也显著低于接种但没施磷的植株。
- 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。。。。。。