氟
- 与 氟 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Many scholars paid close attention to screening risks factors of high fluoride in organism and it is very essential to indentify the primary sensitive indicatrix for forecasting fluoride bone injury.
随着对健康要求的提高,国内外学者越来越关注筛选导致高氟的危险因素,以及确定氟性骨损伤的早期灵敏指标。
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It is benefit to determine biomarker of peroxidation and interdiction or protective experiment of tissue injury.
为进一步探讨氟中毒的发病机制,预防和治疗氟中毒的发生与发展提供科学依据。
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A selective and mild PS-DIB/ionic-liquid immobilized 2, 2, 6, 6-tetramethyl-piperidin-4-ol-N-oxyl catalytic oxidation procedure of alcohols to the corresponding aldehydes and ketones in ionic liquid BF4 at room temperature was developed. The oxidant PS-DIB was prepared via the iodation and acetylation of polystyrene resin. For the preparation of the ionic-liquid immobilized TeMPO catalyst, 4-(2, 2, 6, 6-Tetramethyl-1-oxyl-4-piperidoxyl)butyl bromide was first synthesized from TeMPO and 1, 4-dibromobutane.
将聚苯乙烯树脂先碘化再乙酰基化,制得了负载型二乙酰氧碘苯作为氧化剂。2, 2, 6, 6-四甲基-N-氧自由基哌啶醇与1, 4-二溴丁烷反应生成4-溴丁氧基-2, 2, 6, 6-四甲基-哌啶-1-氧化物,再与N-甲基咪唑发生季铵化反应,生成的溴化季铵盐与四氟硼酸钠进行离子交换制得氟硼酸型2, 2, 6, 6-四甲基-N-氧自由基哌啶负载离子液体。
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A selective and mild PS-DIB/ionic-liquid immobilized TEMPO catalytic oxidation procedure of alcohols to the corresponding aldehydes and ketones in ionic liquid BF4 at room temperature was developed. The oxidant PS-DIB was prepared via Iodation and acetylation of polystyrene resin. For the preparation of the ionic-liquid immobilized TEMPO catalyst, 4-(2,2,6,6-Tetramethyl-1-oxyl-4-piperidoxyl)butyl bromide was first synthesized from 2,2,6,6-tetramethyl-piperidin-4-ol-N-oxyl and 1,4-dibromobutane.
将聚苯乙烯树脂先碘化再乙酰基化,制得了负载型二乙酰氧碘苯(diacetoxyiodo polystyrene,PS-DIB)作为氧化剂。2,2,6,6-四甲基-N-氧自由基哌啶醇(2,2,6,6-tetramethyl-piperidin-4-ol-N-oxyl,TEMPO)与1,4-二溴丁烷反应生成4-溴丁氧基-2,2,6,6-四甲基-哌啶-1-氧化物,再与N-甲基咪唑发生季铵化反应,生成的溴化季铵盐与四氟硼酸钠进行离子交换制得氟硼酸型2,2,6,6-四甲基-N-氧自由基哌啶负载离子液体TEMPO-IL。
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A novel ionic liquid Caprolactam-trifluoromethanesulfonic acid was prepared with trifluoromethanesulfonic acid and Caprolactam as raw material. The structure of the ionic liquid was characterized by 1HNMR and FTIR.
以三氟甲磺酸和己内酰胺为原料制备了一种新型离子液体己内酰胺三氟甲磺酸,用1HNMR、FTIR对其结构进行了表征。
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This paper mainly introduced different oxidation methods,but oxygen,manganese dioxide and manganese sesquioxide were mainly studied.
本文通过采用不同的氧化剂氧化间氟甲苯合成间氟苯甲醛,重点研究了氧气,二氧化锰和三氧化二锰的氧化效果,分别研究了它们的氧化工艺条件以及固体氧化剂的循环利用,并初步探讨了它们的氧化机理。
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Different preparation method and application progress in some fields such as medicine, solvent and thermal medium were summarized.
介绍了三氟乙醇的物理和化学性质,叙述了三氟乙醇的不同合成。法及其在医药、溶剂、热力工质等领域的应用研究进展。
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The conditions and mechanism of removing fluoride ions from water by activated meerschaum have been investigated in this paper.
对海泡石除氟条件及机理进行了实验探讨。结果表明,海泡石经过活化改性后,具有降低水中氟离子含量的作用。
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The method on trans fatty acids analysis in food is very important. The effects of methylate sodium, potassium hydroxide, sulfuric acid and boron trifluoride in methanol and their different concentration and dosage on TFA analysis were studied. The chromatographic condition and the influence of time and temperature on the esterifation of TFA using boron trifluoride in methanol were optimized. A method for analyzing TFA were established by GC based on boron trifluoride in methanol and RT-2560(100m×0.25mm×0.2μm) capillary column.
研究了甲醇钠-甲醇、氢氧化钾-甲醇、浓硫酸-甲醇和三氟化硼-甲醇4种甲酯化试剂的浓度、用量及甲酯化时间和温度对反式脂肪酸检测的影响,优化了色谱条件,建立了以三氟化硼-甲醇法甲酯化,RT-2560(100m×0.25mm×0.2μm)毛细管柱为基础的反式脂肪酸气相色谱检测方法,C18:1-9 t, C18:1-11 t, C18:2-9 t, 12 t和C22:1-13 t 4种反式脂肪酸的最小检出浓度在0.774.08 mg/kg之间。4种反式脂肪酸不同添标浓度回收率为98.44%101.23%,重复测定的相对标准差在0.22%1.31%之间,有较好的准确度和重现性。
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METHODS: Patients met with CCMD-Ⅲ criteria of schizophrenia were randomized into two groups: ziprasidone group (n=118) and haloperidol group (n=117) for a double dummy study. The initial doses were 40 mgd^(-1) and 8 mgd^(-1) and the high did not exceed 160 mgd^(-1) and 20 mgd^(-1) for individual of ziprasidone group and haloperidol group respectively.
将235例精神分裂症病人随机分为齐拉西酮组(118例)和氟哌啶醇组(117例),齐拉西酮和氟哌啶醇最低日剂量分别定为40mgd^(-1),和8mgd^(-1),最高日剂量分别限定为160mgd^(-1),和20mgd^(-1),每日分2次服用。
- 推荐网络例句
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The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.
此刻阴唇已经几乎完全的缝在一起了,排除多余淤血体液的管子和Foley导管从顶端冒出来。
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To get the business done, I suggest we split the difference in price.
为了做成这笔生意,我建议我们在价格上大家各让一半。
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After an hour and no pup, look for continued contractions and arching of the back with no pup as a sign of trouble.
一个小时后,并没有任何的PUP ,寻找继续收缩和拱的背面没有任何的PUP作为一个注册的麻烦。