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Herein, we describe a novel catalysis of palladium complex, which mediates tandem allylation of o-phenylenediamines with 2-ene-1,4-diols using water as solvent.

在本实验中,我们探讨邻-苯二胺类和2—烯—1,4—二醇类在水中进行连续两次烯丙基化的一个新的钯催化系统。

The introduction of amido groups can efficiently increase the water swellability of polyvinyl alcohol film and simultaneously enhance the adsorbability of the film to heavy metal ions.

胺基的引入有效的增强了聚乙烯醇膜的水溶胀性,同时使得膜对重金属离子的吸附能力有很大的提高。

Emphasis: Aminolysis method of hydroxyl on alcohol, addition amination of epoxy alkyl, aminolysis of aliphatics haloid.

重点:醇羟基的氨解、环氧烷类的加成胺化、脂族卤素衍生物的氨解。

The asymmetric ring-opening aminolysis of meso-epoxides represents one of the most important reactions in organic synthesis,giving rise to enantio-enriched aminoalcohol products with two chiral centers.

中文摘要:胺类对内消旋环氧化合物的不对称开环是一类重要的反应,反应生成两个手性中心的氨基醇化合物在有机合成中有着重要的应用。

With 7-Al2O3 treated by the phosphoric acid as the carrier, CuO/NiO as the active components, a catalyst was prepared for the synthesis of cyclohexylamine by aminolysis of cyclohex-anol.

以磷酸预处理的γ-Al2O3为载体,二次浸渍CuO/NiO活性组分制备催化剂,用于环己醇合成环己胺的临氢氨解反应。

Saw Palmetto – It is a small creeping palm and contains free fatty acids and phytosterols, which block the formation of DHT and by inhibiting the enzyme 5-alpha reductase that contributes to androgenetic alopecia and has shown to be more effective than Finasteride in some cases.

锯棕榈-这是一个小型爬行棕榈油和包含游离脂肪酸和植物甾醇,它阻止双氢睾酮的形成,并通过抑制酶的5 -α还原酶有助于雄激素性脱发,并已证明是有效得多胺在某些情况下。

ABSTRACT OBJECTIVE: To study the antiasthmatic effect of domestic salmeterolin comparison with sulbutamol.

目的:考察羟萘甲酸沙美特罗的平喘作用,并与硫酸沙丁胺醇进行比较。

The Asterias extracts has the facilitate effect on gastric emptying in mice. Its effective component may be acid substance. The mechanism was probably due to the block of the activity of dopaminergic system other than reacting with cholinergic system.

海星醇提物具有促进小鼠胃排空作用,有效成分可能是酸性或中性的物质如多糖或多肽、氨基酸、蛋白质等;其促胃排空机制可能与阻断多巴胺系统功能相关,而与胆碱能系统无关。

METHODS: Pulmonary function tests were performed in 20 children with asthmatoid bronchitis (2 months-2.5 years of age) before and 30, 60, and 120 minutes after salbutamo and ipratropium bromide inhalation. The indexes of pulmonary function measured included tidal breathing flow volume loop, percent of tidal volume to peak tidal expiratory flow, terminal flows per peak expiratory flow (25/PF), peak tidal expiratory flow, rate of mid-expiratory to mid-inspiratory flow, respiratory rate and tidal volume per kilogram. RESULTS: Before drug inhalation, the descending branch of the TBFV loop was depressed.

20例2个月至2岁6个月的喘息性支气管炎患儿,在吸入药物沙丁胺醇+溴化异丙托品前、吸入后30,60,120min各行一次潮气流速容量环检查,并进行肺功能各项指标比较,包括潮气呼吸流速容量环的形态,反映小气道功能的敏感指标到达潮气呼气峰流速时的呼气量/潮气量,呼出75%潮气量时的呼气流速/潮气呼气峰流速(25/PF),潮气呼气峰流速,反映大气道功能的指标潮气呼气中期流速/潮气吸气中期流速,潮气呼吸状态下的通气功能,包括呼吸频率,每公斤体重潮气量。

In the three systems, system realizes the crosslinking of PVC bases on the peroxide crosslinking mechanism, the tensile strength of crosslinked PVC has been improved somewhat, the IR spectrum of gel demonstrates that there are characteristic absorption peaks of n-alcohol that belongs to ethanol amine and benzenoid group. From the analysis of gel structure , deduces that the mechanism of crosslinking reaction: under the initiations of peroxide and high temperature, PVC yields macromolecules free radicals, at the same time , styrene"s polymerization and grafting onto PVC takes place, at last the system forms crosslinking structure through coupling between radicals; confirms that triethanol amine can absorb HC1 produced by degradation of PVC, so improves the crosslinking efficiency of peroxide, decreases the HCl"s promotion for PVC"s degradation; deduces that triethanol amine can activate the PVC macromolecules and prolong the free radicals" life-time of PVC macromolecules; the effect to the PVC macromolecule makes styrenes graft reaction easy, and thus improves the crosslinking efficiency.

三种体系中三乙醇胺/过氧化二异丙苯/苯乙烯体系基于过氧化物交联机理实现了聚氯乙烯的交联,聚氯乙烯交联后拉伸强度有一定提高,凝胶红外光谱分析证实了凝胶结构中含有乙醇胺的伯醇基团特征吸收和苯环的特征吸收,由凝胶结构分析,推断出交联反应的机理:聚氯乙烯在过氧化物和热作用下产生大分子自由基,苯乙烯在过氧化物和大分子自由基的作用下发生聚合和接枝反应,最终通过自由基之间的偶合产生交联;证实三乙醇胺可以吸收聚氯乙烯分解产生的HCl,提高了过氧化物的交联效率,消弱了HCl对聚氯乙烯降解的促进作用;推断三乙醇胺可以活化聚氯乙烯大分子并有可能使聚氯乙烯大分子自由基存在的时间得以延长,对聚氯乙烯大分子的作用使苯乙烯的接枝反应易于发生,从而提高了交联效率。

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这一模式非常关注商人的网络信用基础。

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