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Enynes with an aryl ring at the alkyne give 2,3,9,9a-tetrahydro-1H-cyclopentanaphthalenes by a 5-exo-dig cyclization followed by a Friedel-Crafts-type ring expansion.

带有芳环的1,6-二烯体和炔作用,并通过5-exo-dig路径环化,再紧接着Friedel-Crafts扩环,可以得到2,3,9,9a-四羟基-1H-环戊二烯并萘。6-endo-dig途径的环化在一些例子中作为副反应被观察到,尽管,这在一些具体的反应中,是作为主反应出现的。

In fact, among musicians who began their musical studies in early childhood, the corpus callosum, a four-inch bundle of nerve fibers connecting the left and right sides of the brain, can be up to 15% larger.

其实,在他们的音乐的乐者开始研究幼儿,胼胝体、四吋的神经纤维束连接左右两边脑部可达15%较大。

By utilizing three benezenemulticarboxylate derivatives (H2chdc, H2aip, NaH2sip), we obtain 12 coordination polymers. Especially, compelexes 1 and 2 are based on one-dimensional ···OHInOHIn···chains as building units, while complex 3 is based on double four-ring [In8(μ2-O)4(μ2-H2O)8]16+, complex 4 is based on trinuclear In3(μ3-O)(CO2)6, complexes 11 and 12 are both based on nested bistranded helices.

选择了三类取代苯羧酸配体: 2,5-二羟基-1,4-对苯二甲酸(2,5-H2chdc); 5-氨基间苯二甲酸(5-H2aip); 5-磺酸基间苯二甲酸钠盐(5-NaH2sip)和InCl3反应合成了十二个配位化合物:其中1、2以···OHInOHIn···链为构筑单元, 3以双四元环[In8(μ2-O)4(μ2-H2O)8]16+为构筑单元,4以棱柱状三核铟In3(μ3-O)(CO2)6为构筑单元,而11、12以嵌套的双股螺旋链为构筑单元。

WD40 domain, found in a number of eukaryotic proteins that cover a wide variety of functions including adaptor/regulatory modules in signal transduction, pre-mRNA processing and cytoskeleton assembly; typically contains a GH dipeptide 11-24 residues from its N-terminus and the WD dipeptide at its C-terminus and is 40 residues long, hence the name WD40; between GH and WD lies a conserved core; serves as a stable propeller-like platform to which proteins can bind either stably or reversibly; forms a propeller-like structure with several blades where each blade is composed of a four-stranded anti-parallel b-sheet; instances with few detectable copies are hypothesized to form larger structures by dimerization; each WD40 sequence repeat forms the first three strands of one blade and the last strand in the next blade; the last C-terminal WD40 repeat completes the blade structure of the first WD40 repeat to create the closed ring propeller-structure; residues on the top and bottom surface of the propeller are proposed to coordinate interactions with other proteins and/or small ligands; 7 copies of the repeat are present in this alignment.

WD40域,在真核蛋白质的数量发现,涵盖了包括各种功能适配器/信号转导,mRNA前体细胞骨架组装加工和管理模式;通常包含一个从11月24日生长激素肽的N残留端和西部数据肽在其C端和40残留长,因而得名WD40;介于生长激素和WD一个保守的核心,作为一个稳定的螺旋桨式平台,可以绑定的蛋白可以稳定或可逆,形成了一个螺旋桨式与每个刀片是一个四叶片结构组成若干链反平行的β-片;与数份检测实例假设,形成了聚大结构,每个WD40重复序列形成了前三个一个刀片和绞线的最后在未来的刀片链,最后C -末端WD40重复完成了第一WD40重复叶片结构,创造螺旋桨的封闭环结构,对螺旋桨顶部和底部表面残留的建议,配合和其他蛋白质的相互作用/或小配体; 7重复副本,目前这条路。

WD40 domain, found in a number of eukaryotic proteins that cover a wide variety of functions including adaptor/regulatory modules in signal transduction, pre-mRNA processing and cytoskeleton assembly; typically contains a GH dipeptide 11-24 residues from its N-terminus and the WD dipeptide at its C-terminus and is 40 residues long, hence the name WD40; between GH and WD lies a conserved core; serves as a stable propeller-like platform to which proteins can bind either stably or reversibly; forms a propeller-like structure with several blades where each blade is composed of a four-stranded anti-parallel b-sheet; instances with few detectable copies are hypothesized to form larger structures by dimerization; each WD40 sequence repeat forms the first three strands of one blade and the last strand in the next blade; the last C-terminal WD40 repeat completes the blade structure of the first WD40 repeat to create the closed ring propeller-structure; residues on the top and bottom surface of the propeller are proposed to coordinate interactions with other proteins and/or small ligands; 7 copies of the repeat are present in this alignment.

WD40域,在真核蛋白质的数量发现,涵盖了包括各种功能适配器/信号转导,mRNA前体细胞骨架组装加工和管理模式;通常包含一个从11月24日生长激素肽的N残留端和西部数据肽在其C端和40残留长,因此得名WD40;之间的生长激素和WD是一个保守的核心,作为一个稳定的螺旋桨式平台,可以绑定的蛋白可以稳定或可逆性;形式与每个刀片是一个四叶片组成的几个类似结构的螺旋桨,搁浅反平行β-负债表;很少检测副本实例假设,形成了聚大结构,每个WD40重复序列形成了前三个链的一个刀片,并在未来的刀片上链,最后C -末端WD40重复完成了第一WD40重复叶片结构,创造螺旋桨的封闭环结构,对螺旋桨顶部和底部表面残留物,则建议协调与其他蛋白质和/或小配体; 7重复副本存在于相互作用这条路。

WD40 domain, found in a number of eukaryotic proteins that cover a wide variety of functions including adaptor/regulatory modules in signal transduction, pre-mRNA processing and cytoskeleton assembly; typically contains a GH dipeptide 11-24 residues from its N-terminus and the WD dipeptide at its C-terminus and is 40 residues long, hence the name WD40; between GH and WD lies a conserved core; serves as a stable propeller-like platform to which proteins can bind either stably or reversibly; forms a propeller-like structure with several blades where each blade is composed of a four-stranded anti-parallel b-sheet; instances with few detectable copies are hypothesized to form larger structures by dimerization; each WD40 sequence repeat forms the first three strands of one blade and the last strand in the next blade; the last C-terminal WD40 repeat completes the blade structure of the first WD40 repeat to create the closed ring propeller-structure; residues on the top and bottom surface of the propeller are propos

WD40域,在真核蛋白质的数量发现,涵盖了包括各种功能适配器/信号转导,mRNA前体细胞骨架组装加工和管理模式;通常包含一个从11月24日生长激素肽的N残留端和西部数据肽在其C端和40残留长,因而得名WD40;介于生长激素和WD一个保守的核心,作为一个稳定的螺旋桨式平台,可以绑定的蛋白可以稳定或可逆,形成了一个螺旋桨式与每个刀片是一个四叶片结构组成若干链反平行的β-片;与数份检测实例假设,形成了聚大结构,每个WD40重复序列形成了前三个一个刀片和绞线的最后在未来的刀片链,最后C -末端WD40重复完成了第一WD40重复叶片结构,创造螺旋桨的封闭环结构,对螺旋桨顶部和底部表面残留的建议,配合和其他蛋白质的相互作用/或小配体; 7重复副本,目前这条路。

This article summarized the application of biotechnology breeding in fruit trees from embryo culture, anther and pollen culture, protoplast culture and cell fusion, gene engineering breeding.

本文从胚培育种、花药和花粉培养育种、原生质体培养与细胞融合、基因工程育种四个方面综述了生物技术在果树育种上的运用,并对其未来的发展作了展望。

The body has drum mixed with four leaves, stirring with a good performance out of the concrete mix to make a more uniform 2: mixed leaves on a mixed open hole to raise the quality of concrete mixing; 3 ----- sealed tube was funnel shape, Large caliber to ensure a smooth feed: 4: Lo leaves were added to the top surface wear protection, to extend the service life of the leaves, 5 leaves on a few large rectangle-shaped hole and the hole in the concrete to reduce the adhesion of the leaves; 6 : Mixing cylinder B520JJ optional alloy steel materials, wear resistant materials; 7 from the first block plate spinning, 8: ZG35 stirring drum track using the material, casting molding.

筒体内有四块拌叶、具有良好的搅拌性能,使拌出的混凝土更加均匀2:拌叶上开有拌孔能提高混凝土搅拌质量;3密封管-----呈漏斗形状,口径大能确保顺利进料:4:螺叶片呈曲面顶端加防护耐磨条,延长叶片使用寿命,5叶片上有几个圆孔及长方钜形孔减少混凝土在叶片上的粘附; 6:搅拌筒体材料选用B520JJ合金钢、抗耐磨材质;7封头由整块钢板旋压成型,8:搅拌筒轨道采用ZG35材质,经铸造成型。9:搅拌筒壳体各部件由高强度及高耐磨材质制作而成。10:搅拌筒整体焊接采用自动埋弧焊技术。

Gigas eggs, if selected for large size, can gie iable tetraploid offspring.

可以产生可存活的四倍体后代。

AtDFA is dihydrofolate synthase localized in mitochondria, it catalyzes one glutamate added to the dihydropteroate and produces dihydrofolat. AtDFB, AtDFC and AtDFD are folylpolyglutamate synthase localized in plastid, mitochondria and cytosol respectively. A short chain ofγ-linked glutamates can be added by FPGS.Folate molecules exist in vivo mainly as polyglutamates and these are preferred by folate-dependent enzymes.

AtDFA为二氢叶酸合成酶(dihydrofolate synthase,DHFS),定位于线粒体,在它的催化作用下,一个谷氨酸分子与二氢蝶酸(dihydropteroate , DHP)相结合,形成二氢叶酸;AtDFB、AtDFC、AtDFD为多聚谷氨酸合成酶(folylpolyglutamate synthase,FPGS),分别定位于质体、线粒体和细胞质,在多聚谷氨酸合成酶的作用下,谷氨酸分子可以逐一连接到四氢叶酸的谷氨酸γ位。

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I didn't watch TV last night, because it .

昨晚我没有看电视,因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来,在北京的很多小区里,电梯液晶电视被撤了下来。

I'm running my simile to an extreme.

我比喻得过头了。