查询词典 alpha decay

The invention discloses a 3, 5-2-0-(4-chlorobenzene chlorobenzene)-2-deoxidising- D-red-furanoside that contains alpha body and beta body. The method includes the following steps: dissolving chlorine indicant into tetrahydrofuran, quickly adding to alcoholic solutioin, whisking and reacting, after reacting, vacuuming and steaming solvent to gain mixture of alpha body and beta body, taking separation by column chromatography to gain separated alpha body and beta body.

本发明公开了一种3、5-二-O-(4-氯苯甲酰基)-2-脱氧-D-赤-呋喃糖苷，它具有式表示的α体和式表示的β体，制备方法采用在室温下，将氯糖苷溶于四氢呋喃中，然后快速加入到醇溶液中，搅拌下进行反应；反应结束，减压蒸掉溶剂，得到白色固体，将该固体用石油醚溶解，过滤除去不溶物，再次减压蒸去溶剂，得到白色α体和β体的混合物，用柱色谱法进行分离，得到单独的α体和β体。

"Apraclonidine, a selective alpha-2-agonist, was developed to lower intraocular pressure and minimize the systemic side effects associated with the use of its parent drug, clonidine," write Patrick Watts, MBBS, MS, from the University Hospital of Wales in Cardiff, United Kingdom, and colleagues."An investigation of the site of action of apraclonidine incidentally uncovered a reversal of anisocoria in patients with absent sympathetic innervation of one pupil due to its alpha-1-effect on a pupil with denervation supersensitivity.... The easy availability of apraclonidine, its mild alpha-1-agonist activity, and its hitherto benign safety profile has encouraged its use as a first-line drug in the diagnosis of oculosympathetic paralysis."

英国加地夫市威尔斯大学附设医院的外科学硕士Patrick Watts及研究同仁指出，Apraclonidine是一种选择性的α-2-拮抗剂，是用来降低眼内压，并减少其母系药物降保适使用上的相关全身性副作用；在一项针对apraclonidine作用位置的研究中，因其单侧瞳孔神经切除之α-1-效应，而附带提出单侧瞳孔无交感神经支配患者之瞳孔大小不等为可逆转，apraclonidine之高可利用率，其轻微的α-1-拮抗活性，以及迄今良好的用药安全档案，更强化其作为视交感神经瘫痪诊断第一线药物的使用率。

Synthesis of organic sulfuric compounds in aqueous media is carried out by: using thio-olefin compounds with carbonyl compounds, acetal/keltone, hydrazone, oxime, osazone and enamine to synthesize mercaptal/keltone compounds in aqueous media; using thio-olefin compounds with alpha-hydroxyaldehyde/keltone or alpha-halogenated aldehyde/keltone to synthesize thia-olefin derivatives in a queous media; using thio-olefin compounds with alpha, beta-unsaturated hydroxy compounds, C-C treble bond, C-N treble bond, C-C double bond, N-N double bond, C-N double bond, C-S double bond, epoxy and its derivatives, aziridine and its derivatives, cyclopropane and its derivatives and halogenated carboxy to synthesize sulfoether compounds in a queous media.

含水介质中有机硫化合物的合成方法，本发明属于有机合成方法，用硫缩烯酮类化合物与羰基化合物、缩醛/酮、腙、肟、脎、烯胺在含水介质中合成缩硫醛/酮化合物，与α-羟基醛/酮或α-卤代醛/酮在含水介质中合成噻烯类衍生物，与α，β-不饱和羰基化合物、碳碳叁键、碳氮叁键、碳碳双键、氮氮双键、碳氮双键、碳硫双键、环氧乙烷及其衍生物、氮杂环丙烷及其衍生物、环丙烷及其衍生物、卤代烃等在含水介质，中合成硫醚化合物。

At sea, septentrional, by night the polestar, located at the point of intersection of the right line from beta to alpha in Ursa Maior produced and divided externally at omega and the hypotenuse of the rightangled triangle formed by the line alpha omega so produced and the line alpha delta of Ursa Maior.

609海上，朝着北方，夜间以北极星为标志。将大熊星座的&贝塔——阿尔法&这一直线延长至星座外的&奥墨伽&，北极星便位于&阿尔法——奥墨伽&这道外部区分线与大熊星座内的&阿尔法——德尔塔&这一直线所形成的直角三角形斜边的交点上。

Beta-thalassemia major is a serious hereditary hemolytic anemia which does great harm to human being.It is a monogenic disease characterised by a reduced synthesis of beta-globin chains,which dues to the Doint mutation or deletion of beta-globin gene and its control region.It not only decreases the hemoglobin level,but breaks the balance of alpha/beta synthesis ratio.The major cellular pathogenetic mechanisms in beta thalassemia are based primarily on the deleterious effects produced by the accumulation of the excess alpha globin chain.These excess alpha-globin chains cannot form stable tetrameric structure and deposit in erythroid cells.They cause large ineffective erythropoiesis on their own,accelerate red cells destruction,and lead to hemolysis.

地中海贫血是一种对人类健康危害严重的遗传性溶血性贫血病，是因β-珠蛋白基因及其调控序列的点突变或缺失致使β-珠蛋白肽链合成减少或完全停止，这不仅使患者血红蛋白水平降低，而且使原来在数量上与之持平的α-珠蛋白肽链相对过剩，这些相对过剩的游离α-珠蛋白肽链并不能形成稳定的四聚体，它们沉积在红细胞中导致了大量无效红细胞生成和红细胞寿命缩短，引起了严重的溶血性贫血。

The best deal is of course an alpha who is also a provider, but those things kinda cancel each other out because an alpha stops being an alpha when he supplicates.

理想的情况当然是，上等男人同时也是供养者，不过这两者事实上有点冲突，一旦上等男人开始乞怜，他就不再是上等男人。

Radioactive series: Any of four sets of unstable heavy atomic nuclei that undergo a series of alpha decay and beta decay until a stable nucleus is achieved.

放射性系：四组不稳定的重原子核，通过一系列α衰变和β衰变直至达到稳定的核为止。

Baby bottle tooth decay can be said of children's serious tooth decay, its causes and adults in general similar to tooth decay, but also has its special formation background.

奶瓶性蛀牙可说是幼儿的严重蛀牙，其原因和大人一般蛀牙类似，但也有其特殊形成的背景。

According to the Weisskopf-Wiger theory, the spontaneous emission decay in the free space is following an exponential decay law with the constant decay rate.

在第二章中，主要研究了多层结构中二能级原子非马尔科夫自发衰减过程的记忆函数。

This study examined the alumina ceramic membrane to deal with high turbidity water flux changes in the law of decay was found in the early running flux decay rapidly, the latter tends to slow decay, a linear decline in the overall. 51qikan.

Key words： high-alumina ceramic membrane separation of water turbidity摘要：本实验研究了氧化铝陶瓷膜处理高浊度水时膜通量衰减变化规律，发现运行初期膜通量衰减很快，后期衰减趋于平缓，总体成线性下降。

But this is impossible, as long as it is engaging in a market economy, there are risks in any operation.

但是，这是不可能的，只要是搞市场经济，是有风险的任何行动。

We're on the same wavelength.

我们是同道中人。