处理实验数据的一种重要方法——回归分析与相关分析

在大一化学的实验中有一些定量实验。例如,测定过硫酸铵与碘化钾反应的活化能和反应级数;用沉淀滴定法测定银氨络离子的配位数等。在这类实验中所得的数据都含有具有线性关系的两个变量。     

Ⅷ.O-乙基N,N-二乙氨基一(或二)硫代磷酸钠的制备及其化学反应

1.本文报告以O-乙基N,N-二乙氨基硫代磷酰氯(Ⅲ)为原料,合成O-乙基N,N-二乙氨基一(或二)硫代磷酸钠(Ⅰ)、(Ⅱ)的方法。2.Ⅰ和Ⅱ分别与卤代烷反应,得到相应的酯(Ⅴ),(Ⅵ)。Ⅰ和Ⅱ在低温下用稀盐酸酸化则转化成相应的酸(Ⅶ)和(Ⅷ),后者分别与碘乙烷、重氮甲烷、环己胺等作用得到相应的酯(Ⅸ)和铵盐(Ⅺ)。3.Ⅱ与卤素(溴或碘)反应形成二硫化物(Ⅻ),后者与等量氯反应得到磷酰氯(Ⅲ)。     

Joule-Thomson expansion of the regular(Bardeen)-AdS black hole

We study the Joule-Thomson expansion of the regular black hole in an anti-de Sitter background,and obtain the inversion temperature for the Bardeen-AdS black hole in the extended phase space.We investigate the isenthalpic and inversion curves for the Bardeen-AdS black hole in the T-P plane and find that the intersection points between them are exactly the inversion points discriminating the heating from the cooling process.The inversion curve for the regular(Bardeen)-AdS black hole is not closed and there is only a lower inversion curve,in contrast to the Van der Waals fluid.Most importantly,we find that the ratio between the minimum inversion temperature and the critical temperature for the regular(Bardeen)-AdS black hole is 0.536622,which is larger than any known ratio for the singular black hole.The large ratio for the Bardeen-AdS black hole may be due to the repulsive de Sitter core near the origin of the regular black hole.     

高效液相色谱分析青藏高原长梗喉毛花植物中的（口山）酮

1 引言 龙胆科(Gentianacese)植物长梗喉毛花(Comastoma Pedunlulatum[Rogle ex D.Dou] Holub)分布在西藏、青海、甘肃和四川北部,生长在海拔3000～4800 m的河滩和高山草甸等环境中.<晶珠本草>记载:植物长梗喉毛花比之加滴色淡而软,叶微黄.藏名"桑斗",藏医常用药.全草入药,性味苦寒,有利湿祛痰、清热解毒、舒肝利胆等功效.     

高效液相色谱分析青藏高原长梗喉毛花植物中的酮

1　引　　言龙胆科 (Ｇｅｎｔｉａｎａｃｅｓｅ)植物长梗喉毛花 (ＣｏｍａｓｔｏｍａＰｅｄｕｎｌｕｌａｔｕｍ[ＲｏｇｌｅｅｘＤ .Ｄｏｕ]Ｈｏｌｕｂ)分布在西藏、青海、甘肃和四川北部 ,生长在海拔 3 0 0 0～ 4 80 0ｍ的河滩和高山草甸等环境中。《晶珠本草》记载 :植物长梗喉毛花比之加滴色淡而软 ,叶微黄。藏名“桑斗” ,藏医常用药。全草入药 ,性味苦寒 ,有利湿祛痰、清热解毒、舒肝利胆等功效。藏药长梗喉毛花富含酮类化合物 ,酮又称苯并色原酮。自然界得到酮是黄色的酚性化合物 ,它是有广泛的生理活性 ,具有解肝毒、护肝、抗炎…     

单晶YSZ的Xe+离子辐照效应研究

 200keV Xe⁺离子辐照使单晶YSZ由无色透明变成紫色透明，结果表明，能量为200keV，注量为1×10¹⁷cm^-22的Xe⁺离子辐照YSZ单晶产生的损伤高达350dpa，在损伤区产生高密度的缺陷，但仍然没有发生非晶化转变。吸收光谱测试结果表明，产生吸收带的注量阈值大约为10¹⁶cm^-2。注量为1×10¹⁶cm^-2和1×10¹⁷cm^-2的样品，吸收带峰值分别位于522nm和497nm。光吸收带可能与Zr阳离子最近邻的氧空位捕获电子形成的F型色心和Y阳离子近邻的氧离子捕获空穴形成的V型色心有关。     

CO2激光和等离子体清洗提高石英基片损伤阈值

 采用连续CO₂激光和真空等离子体相结合的方法对石英基片进行清洗。通过光学显微图、水接触角、透过率和损伤阈值测量分别表征了CO₂激光和等离子体对真空硅脂蒸发物污染过的石英基片的清洗效果。研究表明：对于真空硅脂蒸发物污染后的石英基片，可以先采用低能量的CO₂激光进行大面积清洗，再用真空等离子体进行精细清洗。光学显微图像表明：清洗后的基片表面的油珠被清除干净；水滴接触角由63°下降到4°；在400 nm附近，基片透过率由92.3%上升到93.3%；损伤阈值由3.77 J/cm²上升到5.09 J/cm²。     

含胺基功能性单体的聚合研究 XIV.含二甲氨基丙烯酰类衍生物与过硫酸钾引发体系引发的丙烯酰胺聚合

N-(N′,N′-二甲氨基亚甲基)甲基丙烯酰胺、甲基丙烯酸N,N二甲氨基乙酯、可聚合叔胺、氧化还原引发体系、超高分子量聚丙烯酰胺     

BENDING OF A CIRCULAR CYLINDER CONTAINING A CRACK

The sludy of bending of cracked circular cylinders is of more significance.The bendingof cylinders containing radical crack or cracks was discussed by refs.[1]-[4]and that ofconcentrically craked circular cylinders was studied by[5].Continuing[6]and usingcomplex variable methods in elasticity,this paper deals with the bending problems of acircular cylinder,containing an internal linear crack at any position under an acting forceperopendicular to the crack.The general forms of displacements stresses,and stress-intensity factors,expressed in terms of series,are obtained and to this bending problemswith small Ah are presented good approximate formulas for the stress-intebsity factorswhose variations with the center of the crack are analysed.Finally,the twist angle per unitlength and the center of bending for the radically cracked circular cylinder,one of whosecrack-tips is located at the origin,have been computed and the results are almost the sameas that calculated in[1].     

单层介质膜的反射起偏

本文讨论了单层介质膜反射起偏的特点,并导出起偏角所满足的关系式。