The results show: the strongest bond is the Al-Al bond in the segregated cell without containing vacancy, where the Al atomic covalence radius is greater than that of Li atom in the cell; while the strongest bond is the Al-Li bond in the segregated cell containing vacancy, and the Al atomic covalence radius in the cell is less than that of Li atom. Since the difference of electronagativity between the Al and Li atoms is obvious, it is inclined to formed the Al-Li segregated cell of short range order structure in the condition of vacancy present. The short range order structure containing vacancy is probably the embryo or precursor structure of the metastable phase δ′(Al3Li). Because the strongest covalent bond in the Al-Li-vacancy segregated cell in alloy formed in quenching is the main strength reason for supersaturated solid solution of alloy. The bond net of succeeding precipitation of δ′(Al3Li) has the picture of anisotropic Al-Al bonding and the bond intensity enhanced. Since the δ′(Al3Li) is coherence with matrix, the bond net strength is enhanced by the precipitation of δ′(Al3Li) and so strengthen the alloy.

計(jì)算結(jié)果表明：不包含空位的偏聚晶胞的鍵絡(luò)最強(qiáng)鍵為Al—Al鍵人人摸夜夜操，其中Al原子的共價(jià)半徑較Li原子的共價(jià)半徑要大；而含空位的偏聚晶胞的最強(qiáng)鍵為Al—Li鍵91制服丝袜， Al原子的共價(jià)半徑要比Li原子的共價(jià)半徑要醒侵轆v色先锋资源电影网站。辉诳瘴淮嬖诘那闆r下可以直接在线观看黄网站免费，由于Al原子與Li原子的電負(fù)性相差明顯，促使Al和Li原子結(jié)合99久热只有精品视频最新，傾向形成Al-Li短程序結(jié)構(gòu)偏聚區(qū)美女裸体日韩成人网站视频在线观看，這種含空位的短程序結(jié)構(gòu)很可能就是δ′(Al3Li)亞穩(wěn)相的前兆結(jié)構(gòu)和生長胚胎；由于Al-Li-空位有序偏聚晶胞的Al—Li鍵絡(luò)比基體鍵絡(luò)要強(qiáng)許多在线观看无码区，因此免费在线观看黄片AV，淬火過程中合金生成的Al-Li-空位偏聚晶胞對合金過飽和固溶體起主要強(qiáng)化作用；后續(xù)析出的δ′(Al3Li)亞穩(wěn)相鍵絡(luò)各項(xiàng)異性顯著九一精品视频在线美女在线观看，鍵絡(luò)強(qiáng)度明顯提高国产精品久久久精品日日；由于Al3Li與基體共格，其大量均勻彌散析出起到提升基體整體鍵絡(luò)強(qiáng)度欧美激情丁香综合，同樣對合金產(chǎn)生強(qiáng)化作用6080无码吃奶在线观看视频。

The results indicate that [(L 1) 2SnEt 2] can selectively bind to the N 1 atom of the base and the phosphate oxygen atom of AMP and may further destroy the helical structure of DNA, while the dimethyltin compound of 1,3 dimethyl 4 acetyl 5 pyrazolone [(L 1) 2SnMe 2] merely binds to the the phosphate oxygen atom of AMP and causes the contraction of DNA helical structure.

結(jié)論3 二甲基 4 乙酰基 5 吡唑酮的二乙基錫配合物(L1 ) 2 SnEt2 可與AMP 的堿基N1 和磷酸根氧原子螯合并可能會(huì)破壞DNA 的雙股螺旋結(jié)構(gòu)国内视频在线视频自拍区；而二甲基錫配合物(L1 ) 2 SnMe2 易與單核苷酸的磷酸氧結(jié)合你懂得黄色网址，難以與單核苷酸的堿基氮原子穩(wěn)定結(jié)合且只引起DNA 雙股螺旋的收縮

The atom structure model of Ni64Pd16Al20 amorphous alloy was set up by using molecular dynamics theory.

摘 要：根據(jù)分子動(dòng)力學(xué)理論建立了非晶Ni64Pd16Al20的結(jié)構(gòu)模型，利用Recursion方法計(jì)算了Ni64X16Al20系非晶及相應(yīng)晶態(tài)的電子結(jié)構(gòu)羞羞视频免费播放。

atom smasher：原子粒子加速器

atom powered ship 原子動(dòng)力船 | atom smasher 原子粒子加速器 | atom structure 原子結(jié)構(gòu)

periodic table：(元素)周期表

三、片段中提及俄國人門得烈夫 (Dmitri Mendeleev) 發(fā)現(xiàn)元素之間有一定規(guī)律,并創(chuàng)制了元素周期表 (periodic table). 甚麼是元素周期表?元素周期表對於原子結(jié)構(gòu) (atomic structure) 的發(fā)現(xiàn)有甚麼啟示?四免费人成视频在线观看视频网站、原子 (atom) 曾經(jīng)被認(rèn)為是不可分割和改變的,

atomies：原子防御

atom structure 原子結(jié)構(gòu) | atomies 原子防御 | atomic 原子的