脑胶质瘤患者血清IL-6、IL-8、IL-10和TNF-α的表达及临床意义

[目的]探讨血清中白介素6（IL-6）、IL-8、IL-10和肿瘤坏死因子（TNF-α）对于脑胶质瘤的诊断价值。[材料与方法]分别检测健康对照组、低级别脑胶质瘤组和高级别脑胶质瘤组中IL-6、IL-8、IL-10和TNF-α的含量。[结果]与健康对照组比较,低级别脑胶质瘤组的IL-6、IL-8和TNF-α有统计学差异,高级别脑胶质瘤组的IL-6、IL-8、IL-10和TNF-α均具有统计学差异。与低级别脑胶质瘤组相比较,高级别脑胶质瘤组的IL-6、IL-10和TNF-α有统计学差异。其中区分低级别脑胶质瘤和高级别脑胶质瘤的诊断价值最好的指标为IL-10,其诊断灵敏性和特异性分别为74.90%和65.80%。IL-6、IL-10和TNF-α联合检测时其灵敏性和特异性分别为92.30%和93.10%。[结论]证实IL-6、IL-10和TNF-α联合诊断价值优于单项指标,为脑胶质瘤的临床诊断提供辅助方法。     

非奇异H-矩阵的充分必要判据

设A=(aij)∈Cn×n,若存在α∈(0,1),使i≠j(i,j∈N={1,2,…,n}),有aii.ajj>[αΛi(A)+(1-α)Si(A)].[αΛj(A)+(1-α)Sj(A)],则称A为严格α-双对角占优矩阵。首先推广严格α-双对角占优矩阵的概念到广义α-双对角占优矩阵;然后得到了判别广义α-双对角占优矩阵的一个充分必要条件,进而可以判断非奇异H-矩阵,改进和推广了已有的结论,进一步丰富和完善了α-双对角占优矩阵的理论。     

基于含参量蕴涵算子H_（p,λ）的多种三I算法

基于新的带参数的蕴涵算子H（p,λ）给出粘了FMP问题的三I支持算法公式、α-三I支持算法公式以及α-三I约束算法公式。并详细证明了这些算法的正确性。     

新型双α-氨基烷基膦酸酯衍生物的一锅合成

在无催化剂条件下,由对苯二甲醛、芳胺和亚磷酸二乙酯进行Kabachnik反应,合成了新型双a-氨基烷基膦酸酯衍生物.其结构经1H-NMR,13C-NMR和元素分析等测试技术进行了表征.实验证明此方法操作方便,条件温和,产率较高,是合成此类化合物的有价值的方法.     

A half century of radioisotope neutron sources in China

Near 50 years history of the development of radioisotope neutron sources in China is briefly reviewed. The structure design, preparing technology and production status of routine neutron sources including 210Po-Be sources, 210po mock fission sources, 241 Am-Be sources, 238pu-Be sources, 252Cf spontaneous fission sources and other special-shape neutron sources are summarized. In addition, the prospects of development on radioisotope neutron source in China are predicted from the needs of nuclear power construction, oil well-logging, neutron moisture gauge and neutron brachytherapy.     

基于身份的前向安全和可公开验证签密方案

针对具有前向安全性和可公开验证的签密方案进行研究,基于Liber 和Quisquater的签密方案,给出了一个新的签密方案,并对所提出方案的安全性和效率进行了分析.结果表明:文章给出的签密方案实现了同时提供前向安全性和可公开验证性;而基于身份公钥密码和双线性对技术,使该方案又具有密钥长度短和密钥管理简单的特点,使其具有与LQ签密方案相当的效率.这种高效性和高安全性签密方案的提出,不仅对相关公开问题的解决具有一定理论意义,同时文中签密方案能更好的满足电子商务等实际应用的高安全需求,因此也具有一定应用价值.     

PKA和PKC对HeLa细胞G2/M/G1进程的影响

为了研究ＰＫＡ和ＰＫＣ对ＨｅＬａ细胞Ｇ２→用Ｍ→Ｇ１期进程的影响,用ＰＫＡ和ＰＫＣ抑制剂分别处理同步的Ｇ２期和Ｍ期的ＨｅＬａ细胞后,测定了细胞有丝分裂指数和ＰＫＡ,ＰＫＣ与ＣＤＣ２激酶的活性。     

调和α-Bloch函数和调和小α-Bloch函数

用给定的增函数刻画调和α-Bloch函数和调和小α-Bloch函数的特征,它们改进了第二作者早期的一些结果。     

Tensile deformation behavior of a solution-treated Ti-33Nb-4Sn alloy with a dual β and α" phases under cyclic loading-unloading

The cyclical tensile deformation behavior of a solution-treated(ST) Ti-33Nb-4Sn alloy with a dual β and α "phases was investigated in this study.Experimental results indicated that the ST Ti-33Nb-4Sn alloy exhibited different deformation behavior during two different loading-unloading cycles,and that the deformation behavior was closely related to the characteristics of stress-induced martensitic(SIM) transformation,mainly including the extent and the reversibility of SIM transformation.During the first cycle,the extensive and incompletely reversible SIM transformation occurred,resulting in notable "double yielding" during loading and residual permanent strain after unloading.In the second cycle,however,a slight and reverse SIM transformation,together with pure elastic deformation,taken place concurrently,giving rise to a recoverable nonlinear deformation behavior.Our results also imply that by tailing the characteristics of SIM transformation,the Ti-based alloys with a mixture of α" and β phases might perform recoverable deformation and possess a promising potential for engineering applications.     

籼型光温敏感核不育水稻“安农S—1”生化特征的初步研究 (Ⅱ)幼穗分化时期叶片及穗中三种同工酶动态分析

在幼穗分化过程中,特别是育性转换敏感时期,“安农S—1”可育株与不育株叶片中过氧化物酶、α—淀粉酶及苹果酸脱氢酶等三种同工酶,其酶带数目和酶带活性都存在着明显的差异.据此认为“安农S—1”发生育性转换与这些酶的变化有关.可育及不育穗中上述三种同工酶差异不明显,且它们对温度的敏感反应迟于叶片.