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The ultrastructural changes during the development of sieve element companion cell complex (SE/CC complex) in Populus deltoides were investigated using electronic microscopy. The result showed that SE and CC tome from the same secondary phloem mother cell. The development of sieve element went through three stages, i. e. immature, mature, and degenerate stage. In immature stages the sieve element presented radial expansion, cell wall thickening, and production of sieve plastid and P-protein. The cytoplasma selectivly autolysed in mature stage. At the same time, karyoplasm was dispersed, and nuclear envelope was not clear, or karyoplasm was disorgnized, and nuclear envelope was clear. The karyopalsm finally turned into P-protein. In degenerate stage, the cytoplasm completely disappeared, and the function was lost.

利用电镜技术研究美洲黑杨次生韧皮部筛管和伴胞发育过程中细胞超微结构的动态变化，观察到筛管和伴胞由同一个次生韧皮部衍生细胞分裂分化形成筛管约发育历经未成熟期、成熟期和衰退期的变化未成熟期筛管分子表现为细胞的径向扩展、壁的增厚、筛管质体和P-蛋白质的产生；成熟期筛管分子细胞组分发生选择性自溶，细胞核核质弥散状，核膜不清晰，或核膜清晰而核物质降解，最后细胞核完全解体转化为P-蛋白质类的物质；衰退期筛管分子细胞质完全解体消失，失去功能。

Ectrodactyly, ectodermal dysplasia and clefting syndrome is characterized by split hand-split foot malformation, congenital ectodermal dysplasia and cleft lip with or without cleft palate.

目前，以先天性缺指、并指或手足裂和外胚叶发育不全伴或不伴腭裂的唇裂为主要临床表现的先天性缺指-外胚叶发育不全-唇/腭裂综合征的病因仍然不明，给疾病的防治带来了较大的困难。

Sometimes whoever seeks abroad may findThee sitting careless on a granary floor, Thy hair soft-lifted by the winnowing wind;Or on a half-reap'd furrow sound asleep, Drowsed with the fume of poppies, while thy hookSpares the next swath and all its twined flowers:And sometimes like a gleaner thou dost keep Steady thy laden head across a brook; Or by a cider-press, with patient look,Thou watchest the last oozings, hours by hours.Where are the songs of Spring?

秋颂1雾气洋溢、果实圆熟的秋，你和成熟的太阳成为友伴；你们密谋用累累的珠球，缀满茅屋檐下的葡萄藤蔓；使屋前的老树背负着苹果，让熟味透进果实的心中，使葫芦胀大，鼓起了榛子壳，好塞进甜核；又为了蜜蜂一次一次开放过迟的花朵，使它们以为日子将永远暖和，因为夏季早填满它们的粘巢。2谁不经常看见你伴着谷仓？

The results showed: 1 All GH deficient children presenting with polyuria and polydipsia had severe ADH deficiency; 2 In 11 GH deficient children without polyuria and polydipsia, 7 were found endogenous ADH insufficient; 3 The children with sho...

结果表明：(1)GH缺乏、伴多饮多尿症状的生长落后儿童均为ADH严重缺乏；(2)GH缺乏、无多次多尿症状的生长落后儿童11例中7例为潜在性ADH缺乏；(3)GH正常、伴多饮多尿症状的生长落后儿童都为ADH部分缺乏；(4)GH正常、无多饮多尿症状的生长落后儿童的下丘脑-垂体后叶功能基本正常。

The Sulfhydryl content of glycinin and β-conglycinin are increased with the increasing of pressure and prolong of processed time; Fluorescence analysis reveals that glycinin has larger hydrophobic regions while processed by higher pressure; But to β-conglycinin, the hydrophobic regions change according to different pressure; The changes of ultraviolet difference spectra of pressured glycinin show that amino acid residues which have ultraviolet absorbance are exposed on the surface of the protein molecule with its unfolding by high pressure denaturation as well as the exposure of sulfhydryl and dissulfide groups.

处理压力的升高和时间的延长都将使大豆豆球蛋白和β-伴大豆球蛋白的半胱氨酸残基暴露，巯基含量增加。荧光分析表明，经压力处理后大豆豆球蛋白表面疏水区域增多：而对于β-球蛋白，在低压作用下，其疏水区域减少，在高压作用下，其疏水区域增加，但在过高的压力下，β-伴球蛋白中的疏水区域又呈现减少的趋势。

Children will relate to this predicament as the newcomer to a game frequently ousts the originator and takes over. In spite of this they become playmates. In fact, Dan's sister's imagination clearly comes into play as the adventure increases in its complexity to include 'pirate clowns juggling plates, while others sing sea-shanties, tell truth-whispering tales and feast on pig, yams and fig'.

但孩子们常会面临新加入的玩伴时常会剥夺起源者的权力并接管整个游戏的处境，尽管这样，他们还是成为很好的玩伴，事实上，正当其他小孩在唱著水手歌，说著海上故事和享受猪肉，马铃薯和无花果大餐， Dan的姊姊，脑海里却浮现了日益复杂和与众不同的剧情&小丑海盗表演牌子杂耍&。

During the fracturing for low pressure and low permeability gas reservoirs, there are some main problems in conventional hydroxypropylguar - organic boron cross-linking system: Firstly, the water-lock damage to low pressure and low permeability gas formations by filter liquor; Secondly, the reason for alkali-sensitive damage in alkali-sensitive reservoirs is that conventional hydroxypropylguar - organic boron cross-linking fracturing fluids were cross-linked under alkaline environment, while the permeability of reservoirs is reduced greatly; Thirdly, the formation pressure is low, and the energy of flow back is not enough, at present, the main measure in oil fields is "injecting with liquid nitrogen", but this technique increased the cost of fracturing, making great troubles in operating, and leaving the liquid nitrogen also is a big problem.

在低压低渗透气藏的压裂改造过程中，常规羟丙基胍胶-有机硼交联压裂液体系存在的主要问题，一是压裂液滤液对低压低渗透气层造成的水锁损害；二是常规羟丙基胍胶-有机硼压裂液是在碱性条件下交联的，对碱敏性储层造成碱敏损害，降低储层渗流能力；三是地层压力低，压裂液返排能量不足，当前各油田采取的措施主要是&液氮伴注&技术，但是&液氮伴注&技术增加了压裂的费用，而且液氮存放也存在较大问题。

Not only seminars held on every Thursday but also we conduct movie sharings on every Friday night in Taiwan for members to welcome their new friends to know more about us.

Rocky101 服务团队也除了举办各种演讲活动外，特别也在每个星期五周未，邀请所有渴望更成功及学习更多的夥伴们，携伴参与 Rocky101 精选的激励电影欣赏会，藉由影片的导读与心得分享，希望带给大家最好的知识信念与分享最新的知识讯息。

Dense cytoplasm with abundant mitochondria, endoplasmic reticulums, multivesicular bodies, vesicles and plastids were observed in normal light intensity.

在正常光照下的伴胞具有致密的细胞质，内含丰富的线粒体、内质网、多泡体、囊泡和质体，而弱光下的伴胞明显液泡化，同时含有少量的线粒体和内质网。

This kind of excursion best requires no company, I'll even be more severe, you have to be alone; because having a companion will sooner or later distract you, especially young lady friends, there aren't more dangerous or dictatorial companions than them, you must avoid them as avoiding a beautiful viper in the grass.

这样的玩顶好是不要约伴，我竟想严格的取缔，只许你独身；因为有了伴多少总得叫你分心，尤其是年轻的女伴，那是最危险最专制不过的旅伴，你应得躲避她像你躲避青草里一条美丽的花蛇！

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。

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。