This model of semiconservative replication-conservative because each new molecule has one half of the former parent molecule-was later confirmed by the work of Meselson and Stahl.

這個DNA復(fù)制模型稱為"半保留復(fù)制"人人摸人插，因?yàn)閮蓚€新的DNA雙螺旋分子中各含有一條母鏈久久精品国产亚AV香蕉。此模型之后得到了梅塞爾森和斯塔爾的證實(shí)欧美特黄色视频。

Replicas of DNA are made when the double helix unwinds as a result of helicase enzyme action and the separated strands serve as templates along which complementary nucleotides are assembled through the action of the enzyme DNA polymerase. The result of the two new molecules of DNA each containing one strand of the original molecule, and the process is termed semiconservative replication.

DNA 的復(fù)制在解旋酶解開 DNA 鏈時開始369超碰在线观看，解開的鏈作為模板 DNA 聚合酶的作用下結(jié)合相對應(yīng)的核苷酸，最終形成了兩條新的 DNA 的鏈97在线超级对对碰免费，每一條的鏈含有一條鏈原來的 DNA 單鏈一级一级性爱视频，因此又叫做半保留復(fù)制。

Semiconservative replication :The two strands of DNA double helix are separated, each strand serves as a template for the synthesis of a new complementary strand, producing two daughter molecules. Each daughter molecule has one parental strand and one newly synthesized strand.

半保留復(fù)制： DNA 生物合成時新天堂成人av福利网站在线，母鏈 DNA 解開為兩股單鏈欧美tV，每股單鏈分別作為模板，以 dNTP(dATP 国内外色呦色呦网站、 dGTP 老妇人黄色片、 dCTP 、 dTTP)為原料免费一级毛片完整版视频超级，按照堿基配對(A － T 国产第一页视频、 G － C)規(guī)律與模板上的堿基配對，經(jīng)依賴 DNA 的 DNA 聚合酶催化精品一区二区三区无码毛片，合成一條與模板互補(bǔ)的新鏈欧美乱色伦的图片区，新形成的兩個子代 DNA 與親代 DNA 堿基序列一致，子代 DNA 分子中一股單鏈?zhǔn)菑挠H代完整地接受過來狂野欧美性交大全，另一股單鏈?zhǔn)切潞铣傻墓嗳瞬俦剖悠担史Q為半保留復(fù)制。

In addition, a new synchronization scheme, Double-Timestamp Transaction-Level Synchronization model is put forward to solve the synchronization problem under the 3-tier replication architecture (Mobile Client - Synchronization Server - Database Server). DTSTLS utilizes a novel double-timestamp strategy to promote the efficiency of synchronization. Besides, it ensures serializability and consistency of the mobile database system through transaction-level conflict reconciliation.Mobile transaction processing is another key technology to provide efficient information service in mobile computing environment.

通過引入一種樂觀并發(fā)控制方法與兩段鎖協(xié)議相結(jié)合的移動事務(wù)處理機(jī)制直接免费在线观看的黄网站，本文重點(diǎn)解決了交互式長事務(wù)的問題欧美淫秽视频，并提供了對移動主機(jī)任意移動性和數(shù)據(jù)庫系統(tǒng)一致性的支持；在移動對象數(shù)據(jù)庫方面三级A片视频，本文提出了一種新的移動對象數(shù)據(jù)庫模型—離散時空軌跡移動對象數(shù)據(jù)庫模型亚洲精品白色在线发布，重點(diǎn)闡述了DSTTMOD模型中的位置表示方法及位置更新處理策略91popny丨丝袜，并分別給出了基于GRID文件和基于QUAD樹的移動對象索引算法。

Objective To investigate the situation of expression of Pee-SI antigen in serum of chronic hepatitis B patients and the effect of these markers on FIBV replication.

目的 了解乙型肝炎病毒前S1(Pre-S1)抗原在乙肝患者血清中的表達(dá)及評判其與HBV復(fù)制的關(guān)系L免费毛片。

The results indicate that the replicated moulding using solid silicone rubber PDMS as a matrix for replicated mould is a relatively perfect method of surface micro-replication, and that the electroforming is a feasible way to prepare metal mould with the microstructure of sharkskin when the sharkskin-like polyurethane sample prepared with the PDMS mould is used as a prototype for electroforming.

結(jié)果表明：以固體硅橡膠PDMS作翻模材料的復(fù)型翻模法是較佳的表面微復(fù)制方法一区免费精品视频。

Silencing of these genes resulted in inhibition of HCV replication by more than 60% and exhibited minimal toxicity.

使這些基因沉默可以導(dǎo)致HCV復(fù)制減少超過60%，而且細(xì)胞毒性降到最低国产真人A片免费看。

The replication feature of the popular culture is the root of the simulacrum.

仿像的根源是大眾文化的復(fù)制性特征男女XX00动态图视频gif。

The transcription-associated effects contribute to the overall skew through the uneven distribution of the coding sequences on the leading and lagging strands; the replication-associated effects, on the other hand, through the entire chromosome.

其中結(jié)合轉(zhuǎn)錄的效應(yīng)對整體不對稱性的貢獻(xiàn)主要是藉由蛋白質(zhì)轉(zhuǎn)錄序列在復(fù)制雙股之間的分布所造成；結(jié)合復(fù)制的效應(yīng)的貢獻(xiàn)則遍及整條染色體色01永久视频。

The off-axis reflection system composed of four aspheric mirrors was designed, but the system structure was not so simple and the performance can also be improved, besides, manufacture and test for large aspheric mirrors are difficult; and then the spherical Fresnel mirror which is easier to be manufactured and tested was used to replace the aspheric mirror, the spherical Fresnel mirror has low cost of replication, but this design also can\'t be used in projection lens because it was only feasible in narrow wavebands; Furthermore, the design making use of catadioptric projection lens was accomplished, this design is greatly applied in rear projector because it has merits of both refraction and reflection. But it had difficulties in color aberration correction and had complex structure.

設(shè)計了四片非球面組成的離軸式反射系統(tǒng)麻豆一级毛片无码视频，然而，僅采用非球面設(shè)計系統(tǒng)結(jié)構(gòu)不夠精簡黄色视频制服网站，性能也有待進(jìn)一步提高亚洲免费每日在线观看一级性生活片，且非球面面形較大時加工和檢測都存在一定的困難；繼而提出了用球面Fresnel反射鏡代替非球面的設(shè)計方法亚洲日韩在线综合一区视频，雖然Fresnel反射鏡加工和檢測更為簡單，且復(fù)制成本低欧美性爱一级免费，但對波長具有選擇性日韩老司机深夜无码影院视频；進(jìn)而，應(yīng)用折反系統(tǒng)結(jié)合的方式設(shè)計了離軸式投影鏡頭色就是色欧美黄片，該方法因兼具折射和反射的優(yōu)點(diǎn)永久黄网色视频免费观看，在大屏幕超薄背投系統(tǒng)的設(shè)計中廣為應(yīng)用，缺點(diǎn)是會產(chǎn)生難以校正的色差自拍偷国产三级片2020，且結(jié)構(gòu)復(fù)雜日韩高清性爱网站。