Description of a new species of the genus Tylopharynx (Nemata : Diplogasteroidea), T-clariamphida sp n., with a redescription of T-foetida (Butschli, 1874) Goffart, 1930

Tylopharynx clariamphida sp. n. is described from muddy sand collected in Anhui Province, China. It can be distinguished from T foetida (Butschli, 1874), the type and only species of the genus, by numerous characters: having 24 to 26 prominent and clearly separated longitudinal ridges, a higher lip region with no hint of a cephalic framework, more prominent amphidial foveae in lateral view, wider and more posteriorly located amphidial apertures, smaller basal knobs of stoma, longer metacorpus, more enlarged phasmids, shorter spicules with shorter digitate terminus, shorter reflexed part of testis, and thicker gubernaculum with more angular shape. For comparison, an expanded description is given for T foetida from Belgium, and SEM photographs of both species are provided.

牛血清蛋白在亲水硅片表面吸附的原子力显微成像

本文用原子力显微术（AFM）研究了牛血清白蛋白（BSA）在亲水硅片表面的吸附，硅片表面经亲水处理后，将牛血清蛋白（BSA）吸附在表面，采用轻敲模式，可获得清晰的AFM图像，牛血清蛋白（BSA）的AFM图像表明：BSA在亲水硅片表面是单分子，水平吸附在硅片表面，且吸颗粒状；1mg/ml的BSA在吸附30min后为饱和吸附。BSA到达硅表面后，蛋白中可移动的带正电荷的基团可以趋向亲水表面，使BSA与硅表面的静电相互作用由斥力变为吸引力，BSA可以稳定地吸附在亲水硅片表面。

加卸载响应比与损伤变量关系研究

首先介绍加卸载响应比的2个基本参量,并从损伤力学的基本理论出发,引入损伤变量,结合加卸载响应比方法的思想,推导用损伤和应变定义的加卸载响应比,并以Weibull分布作为随机分布函数,建立且分析损伤变量与加卸载响应比之间的联系,并进一步考察Weibull指数对两者关系的影响.然后利用岩石破坏声发射实验的数据,用声发射数密度描述岩石试件的损伤演化过程,并由此根据损伤和应变定义的加卸载响应比,结合实验过程中的损伤和应变,计算花岗岩试件的加卸载响应比曲线,并与用Benioff应变作响应量计算的加卸载响应比曲线进行比较,发现两者具有相当程度的一致性,两者的加卸载响应比值都经历了出现异常→升高到最大值→急剧回落→岩石试件破裂或失稳,这一规律与实际地震震例中加卸载响应比的演化趋势是一致的,同时也说明在实际地震预测中用Benioff应变作为响应量来计算加卸载响应比是合理的.最后介绍意大利那不勒斯大学完成的二层楼房的加卸载实验,且对实验结果进行分析.建立的加卸载响应比与损伤变量的关系,不仅为加卸载响应比用来定量研究脆性介质的损伤程度提供更为坚实的基础,而且也可能为评估大型建筑的损伤和预测工程事故开辟新道路.

Fabrication of two-dimensional periodic nanostructures by two-beam interference of femtosecond pulses

Two-dimensional periodic nanostructures on ZnO crystal surface were fabricated by two-beam interference of 790 nm femtosecond laser. The long period is, as usually reported, determined by the interference pattern of two laser beams. Surprisingly, there is another short periodic nanostructures with periods of 220-270 nm embedding in the long periodic structures. We studied the periods, orientation, and the evolution of the short periodic nanostructures, and found them analogous to the self-organized nanostructures induced by single fs laser beam. (C) 2008 Optical Society of America.

Ultrafast temporal pattern generation and recognition

Ultrafast temporal pattern generation and recognition with femtosecond laser technology is presented, analyzed, and experimentally implemented. Ultrafast temporal pattern generation and recognition are realized by taking advantage of two well-known techniques: the space-time conversion technique and the ultrafast pulse measurement technique. Here the temporal pattern for the designed multiple pulses, optimized with a preassumed Gaussian spectral distribution of an ultrashort pulse, is described. With the simulation of a Gaussian spectral distribution, we realize that the uniformity of the generated multiple ultrafast temporal pulses is relevant to the repeated number of modulation periods in the mask in the spectral plane. Moreover, the change of Gaussian spectral phases with the wavelengths in the modulated phase plate is considered. Experiments of ultrafast temporal pattern recognition by the frequency-resolved optical gating (FROG) characterization technique are also given. (C) 2004 Society of Photo-Optical Instrumentation Engineers.

成像光通信系统及编解码方案

采用通信理论建立了成像光通信的时空连续三维高斯信道模型，分析了信道容量。结果表明利用光的空间特性可以增加信道容量，其效果取决于系统的空间带宽积。提出了一个成像光通信的收发系统方案，给出了基本的系统设计条件，并分析了系统性能。进行了30m距离的点阵图传输实验，结果验证了系统的设计要求和性能。给出了一种适合成像光通信的信号相关探测接收方法，它要求用于通信的点阵图像需按照二维空间正交码来构造。为了提高相关接收时的信号处理速度，还可考虑采用光学信息并行处理器，例如非相干多通道相关器，并对该相关器的工作过程做了描述

国产贝母属（百合科）的系统学研究

作者通过实地调查，栽培观察，大量查阅标本，对国产贝母属(Fritillaria L.)的形态性状作了深入的分析，认为贝母属中植株大小，茎生叶先端卷曲与否，花的数目、花梗的长短、花被片颜色等性状易受生境的影响;而鳞茎所具鳞片的数目，植株最下一轮叶的形状及排列，花部蜜腺的形状，花柱柱头的分裂程度，雄蕊花丝在发育完后的长短，蒴果的形状等性状受生境的影响较小，但在栽培情况下，这些性状有时也会发生变化．此外，作者首次报道了部分国产贝母属种类的核型和花粉形态．在此基础上对我国贝母属进行了系统整理，将正式发表的138个分类名称（包括80个种、52个变种、5个变型、1个栽培变型）归并成24种l变种，并对国产贝母组(Seclion Fritillaria)的种间关系作了初步探讨;同时，对该属的次级分类也作了修订．根据有关，F.karelinii花粉学和细胞学资料，以及邻近4个种的形态特征及分布特点，我们支持J.G..Baker(1874)的观点将该类群保留在贝母属内而不同意A.S.Lozin-Lozinskaya(1935)，A.Takhtajan(1987)将其单立成属也不同意W.B.Turrill &J.R.Sealy(1980)将其并入贝母组(Sect.Fritillaria)，而将该类群做为贝母属中的一个新组——砂贝母组(Sect.Rhinopetalum (Fish. ex Alex.) Y.B.Luo)．并认为该组与贝母组关系较近．作者通过上述工作及查阅世界各地有关贝母属的文献，认为贝母属内最原始的类群是Sect. Fritillaria，而Sect.Petillium，Sect.Rhinopetalum和Sect.Theresia是演化水平中等的类群．Sect.Liliorhiza则是演化水平最高的一类．通过对该属组(Section)级及种级分布式样的分析，认为伊朗一土兰区不仅是组的多度中心，并且也是多样化中心;在种级水平上，地中海区是分布的多度中心，而种级多样化中心则在伊朗一土兰区;此外，在伊朗一土兰区还保留着一些较原始的类群，因而，该区可能是贝母属的起源中心，最后，作者对贝母属的起源时间、散布途径及现代分布格局形成的原因进行了初步探讨．

山茶属茶组植物分子系统学初步研究

山茶科植物的叶绿体基因和nrDNA基因分别为母系和双亲遗传，二者的联合分析为系统发育重建，特别是揭示网状进化过程提供了便利条件。茶组(Sect. Thea (L.) Dyer )属山茶科(Theaceae)山茶属(Camellia)，除茶（C. sinensis (L.) O. Kuntze）为广布种外，其余种主要分布在我国云南、广西、贵州和四川等地。自从W. T. Dyer（1874）建立茶组以来，该组作为一个自然类群，不存在大的争议，但是组下系统分类至今在国内外学术界中争议颇多。 本文选择来自于叶绿体的2个DNA片段，通过序列分析对茶组的28个种进行了系统发育重建。主要结果如下： (1) 叶绿体DNA rpS12-rpL20和trnS-G的序列分析 2个叶绿体DNA片段联合分析，将茶组植物分为两大支，部分种之间的系统发育关系得到了分辨。该叶绿体基因的分析结果支持茶组植物为一个单系类群，但与以往将茶组分为子房五室类群和三室类群的观点不相吻合。 (2) 茶组nrDNA ITS区研究结果 选用14个种茶组植物，对其nrDNA ITS区进行序列分析。茶组植物nrDNA ITS区扩增比较困难，且存在种内多态性，因而在测序之前需要对PCR产物进行克隆。

无指盘臭蛙抑生肽、其基因和变异体及其在制药中的应用

本发明涉及无指盘臭蛙抑生肽、其基因和变异体及其在制药中的应用，属生物医学技术领域。无指盘臭蛙抑生肽是一种多肽，分子量2080.64道尔顿，等电点9.39，具有病原微生物抑制活性。无指盘臭蛙抑生肽全序列为：NH2-GIFGKILGVGKKVLCGLSGMC-COOH。编码的基因由304个核苷酸组成，其中编码成熟部分的为第136-198位核苷酸。改变无指盘臭蛙抑生肽原始序列中一个或几个氨基酸所产生的变异体，人工合成的无指盘臭蛙抑生肽及其变异体具有强烈的病原微生物抑制活性，以及肿瘤抑制活性。而变异体在这些抑制作用中表现出经改良的特性。无指盘臭蛙抑生肽及其变异体作为制备治疗肿瘤和病原微生物感染疾病的治疗药物的应用。并且还具有序列简单、合成方便活性强等优点。

中国鳅属鱼类的副性征、噶氏斑纹和分类整理(鲤形目,鳅科,鳅亚科)

根据噶氏斑纹和雄性个体的副性征,对我国的鳅属鱼类进行了分类整理。一直被作为中华鳅Cobitissinensis Sauvageet Dabry,1874同物异名的长吻鳅C.dolichor hynchus Nichols,1918和稀有鳅C.rarusChen,1981不仅在噶氏斑纹上存在差异,而且它们雄性个体的副性征也明显有别,为有效种;而1925年Nichols命名的花斑鳅C.melanoleuca Nichols,1925与北方鳅C.granoeiRendahl,1935或中华鳅不同,也为有效种。因

武汉东湖沉积物孔隙度与含水量

对采自武汉东湖Ⅰ站、Ⅱ站的沉积物采用一种新的方法计算孔隙度:拍摄扫描式电子显微镜(SEM)图像,采用局部区域阈值化的方法对图像进行阈值化(thresholding)处理,运用自编程序求出孔隙度的垂直变化.结合含水量的垂直变化,分析孔隙度与含水量之间的关系,并对影响它们垂直变化的因素进行了讨论.结果表明:SEM图像局部区域阈值化法是研究沉积物孔隙度的有效方法;孔隙度与含水量表层较大,从表层到底层呈明显的下降趋势;孔隙度(K)与含水量穴H雪有比较好的正相关.运用拟合的相关方程式,可以由较易获得的东湖Ⅰ站和Ⅱ站

A new species of Allocreadium (Trematoda : Allocreadiidae) from freshwater fishes in the Danjiangkou Reservoir in China

A new species of Allocreadium, Allocreadium danjiangensis n. sp., is described from the intestine of several species of freshwater fish, including Abbottina rivularis (Basilewsky, 1855), Sarcocheilichthys nigripinnis nigripinns (Gunther, 1873), Gnathopogon argentatus (Sauvage et Dabry 1874), Opsariichthys uncirostris bidens (Gunther, 1873), and Erythroculter mongolicus mongolicus (Basilewsky, 1855) (Cyprinidae) from the Danjiangkou Reservoir in central China. The main morphological characters of the new species are as follows: vitelline follicles numerous, extending from the level of acetabulum to posterior extremity, distributed over both sides around the ceca; cirrus sac relatively large, developed, lying obliquely anterior to the acetabulum, extending from the level of the intestinal bifurcation to the central level of acetabulum, and overlapping left or right cecal; and ovary much smaller than testes, generally close to or even overlapping the anterior border of anterior testis. Observation by scanning electron microscopy shows only 2 kinds of tegumental formations, i.e., papillae and tubercles, instead of 3 types of tegumental formations, i.e., papillae, bosses, and minute sensor receptors observed on other species of the Allocreadiidae. The tegumental striations of the present species vary on the different parts of the body. In addition, a new structure, identified as the "groove" with a tonguelike tubercle, was observed on the inner wall of acetabulum.

A settlement inhibition assay with cyprid larvae of the barnacle Balanus amphitrite

A settlement inhibition assay using barnacle cyprid larvae, Balanus amphitrite, was developed with Cd2+ and phenol as standard reference toxicants. Mean percentage settlement of cyprid larvae showed a progressive reduction with increasing concentrations of Cd2+ and phenol. A significant reduction in settlement was found when cyprids were exposed to 0.1 mgL(-1) Cd2+ or 10 mgL(-1) phenol. The assay was used to assess the sublethal toxicity of three oil dispersants (Vecom B-1425 GL, Norchem OSD-570 and Corexit 9905) commonly used in Hong Kong waters. Results of this investigation show that the barnacle settlement inhibition assay can be incorporated into the battery of tests currently available for ecotoxicological assessment of marine contaminants. (C) 1997 Elsevier Science Ltd.

基于模糊提取的远程双向生物认证

传统的远程生物认证采用安全信道或者生物认证过程本地化的方法,具有较多的局限性.模糊提取可从生物特征输入中以容错的方式可靠地提取出均匀分布的随机密钥,当输入发生变化且变化很小时,该密钥保持不变.基于这一重要工具,给出了一个零存储的非安全信道双向生物认证方案.该方案无需存储和传输用户的生物特征,有效保护了用户隐私,并能够抵抗假冒攻击和多服务器合谋攻击.此外,所给方案还具有良好的可扩展性,集成口令和智能卡可产生多因素认证方案,并支持用户注册更新.

Effect of Ru addition to CO/SiO2/HZSM-5 catalysts on Fischer-Tropsch synthesis of gasoline-range hydrocarbons

Microporous HZSM-5 zeolite and mesoporous SiO2 supported Ru-Co catalysts of various Ru adding amounts were prepared and evaluated for Fischer-Tropsch synthesis (FTS) of gasoline-range hydrocarbons (C-5-C-12). The tailor-made Ru-Co/SiO2/HZSM-5 catalysts possessed both micro- and mesopores, which accelerated hydrocracking/hydroisomerization of long-chain products and provided quick mass transfer channels respectively during FTS. In the same time. Ru increased Cor reduction degree by hydrogen spillover, thus CO conversion of 62.8% and gasoline-range hydrocarbon selectivity of 47%, including more than 14% isoparaffins, were achieved simultaneously when Ru content was optimized at 1 wt% in Ru-Co/SiO2/HZSM-5 catalyst.