贝努里概型与数据检测抽样规模的估计

根据贝努里概型提出一类数据质量检测抽样的方法,该方法可以预估抽样规模和错误样本抽出率.     

一个推测的马氏珠母贝肿瘤抑制子QM的cDNA分析

从马氏殊母贝（P．martensif）足的SMARTcDNA文库中得到了一个与肿瘤抑制子QM基因同源的克隆,测序获得了757bp的全长cDNA序列，推测的开放阅读框位于23-673bp，编码217个氨基酸，由20种氨基酸组成，最少的为色氨酸，仅占1．4％，最多的为精氨酸，有24个，占11．1％；同GenBank数据库中查找到的马氏珠母贝（P．fucata）QM基因仅在末尾有4个氨基酸存在差异．P.fucata缺少P．mariensii在开放阅读框的第637处对应的碱基C，导致P．fucala的QM蛋白在3′端多了13个氨基酸和缺乏多聚腺苷酸加尾信号AATAAA．因而，已报道的P.fitcataQM基因很可能由于测序等原因导致在开放阅读框第637处缺失了碱基C．     

Dynamic analysis of preferential orientation of arasonite crystals in nacre from mollusk shell

Based on the scanning electron microscope （SEM） observations, it is confirmed that the nacre is composed of aragonite crystals and organic matrix with interlaced arrangement, showing ordered ＂brick-mortar＂ structure. The dynamic analysis of preferential orientation of aragonite crystals in the nacre from the abalone （Haliotis diverscolor supertexta） with different shell ages is systematically investigated using X-ray diffraction （XRD） and high resolution transmission electron microscope （HRTEM）. Experiments reveal that, in the nacre from the juvenile mollusk shell, there exist three kinds of orientations of aragonite crystals： （113）, （002） and （012）. However, along with the growing of the mollusk shell, the intensity of （012） and （113） becomes weak, and the （002） becomes the preferred crystal orientation of aragonite in the nacre from the adult mollusk shell, which means that the c axis of aragonite crystals is perpendicular to the nacreous layers. The results obtained show that the nacre possesses a highly ordered structure at the micrometer/nanometer mulUscale levels.     

鳖养殖中掩蔽物作用的研究

矾究了工厂化养鳖中掩蔽物对鳖的稚鳖期和幼鳖期生长的影响。结果表明：提供砂子、瓦片和水浮莲作为掩蔽物反而不利于鳖的生长；无掩蔽物使得养殖水质更易控制，稚、幼鳖生长率提高。     

山口红树林区稚幼鱼多样性及其对渔业资源的补充作用

于2010年4,10月,2011年1,5和7月对广西山口红树林区内稚幼鱼4个季节5个航次的采样数据进行分析.红树林缘潮滩和红树林内潮沟采样工具分别为定置张网及鱼笼.共采获稚幼鱼40种,隶属于8目24科,所有种类均为硬骨鱼类.红树林区各季节优势种变化较大.林缘潮滩优势种分别为:春季(4和5月)为前鳞鲻(Mugil ophuyseni)和花鲈(Lateolabrax japonicus);秋季(10月)为印度小公鱼(Stolephorus indicus);冬季(1月)为前鳞鲻;夏季(7月)为短吻鰏(Leiognathus brevirostris)和斑鰶(Clupanodon punctatus).林内潮沟优势种分别为:春季(4和5月)为眶棘双边鱼(Am-bassis gymnocephalus)和斑鰶;秋季(10月)为短吻鰏;冬季(1月)为前鳞鲻和纹缟鰕虎鱼(Tridentiger trigonocepha-lus);夏季(7月)为犬牙细棘鰕虎鱼(Acentrogobius caninus).以质量计算不同季节Margalef种类丰富度指数D,Shan-non-Wiener多样性指数H′以及Pielou均匀度指数J,潮滩平均值分别为D=1.83,H′=1.5,J=0.53;潮沟指数分别为D=1.63,H′=1.46,J=0.58.本研究表明山口红树林生态系统内稚幼鱼H′偏低.通过分析鳀科、鲱科以及鲻科鱼类在本研究区域内具有较为典型的生境转移现象,可以认为山口红树林区具有支撑近海鱼类育幼和摄食的作用,同时,该林区内稚幼鱼对当地渔业资源具有补充作用.     

几个不等式的应用

引述几个初等的不等式,给出了这些不等式在求极限、极值时的作用,使一系列问题得到直接的处理.并沟通了一些不等式之间的相互关系.     

贝利特的机械力化学活化

将１３５０℃下合成的贝利特置于振动磨中粉磨１～７０ｈ后，研究了贝利特在粉磨过程中所发生的机械力化学变化，如粒度分布、晶体结构、晶格应变、粉体表面特性及早期水化活性等。结果表明，粉磨作用可降低贝利特粉体粒度，并使贝利特晶胞参数发生变化；同时使贝利特晶体结晶度下降，贝利特晶格应变及早期水化活性增加，大大提高了贝利特浆体强度；随着粉磨时间延长，贝利特表面伦敦色散分量及极性分量不断提高。当粉磨时间超过３０ｈ时，贝利特表面能反而降低，并使贝利特粉体粒度增大。     

四角蛤蜊稚贝的温度试验初探

本文对四角蛤蜊稚贝存活的各项温度指标进行了室内研究,结果表明,四角蛤蜊稚贝起始致死温度是随着驯化的变化而改变,最高起始致死温度为３５．１℃,生长的周平均最高温度为２７．７℃     

Extraction and Purification of Matrix Protein from the Nacre of Pearl Oyster Pinctada fucata

A soluble matrix protein P14 with an apparent molecular mass of 14.5 kDa was isolated from fragmented nacre of pearl oysters （Pinctada fucata） treated with 10% NaOH solution to investigate the nacre matrix proteins and their effect on the CaCO3 crystal. The protein was characterized by gel exclusion chromatography and reversed-phase high performance liquid chromatography after demineralization by 10% acetic acid. The X-ray diffraction pattern of P14 crystals indicates that P14 plays an important role in nacre biomineralization. P14 can induce aragonite formation, stimulate CaCO3 crystal formation, and accelerate aragonite precipitation. Heating of the acid insoluble nacre residue, which was named conchiolin, in 10% sodium dodecyl sulfate solution supplemented with 10% β-mercaptoethanol solution for 10-20 min at about 100℃ gave two other soluble proteins having molecular masses of 19.4 kDa and 25.0 kDa. The present study suggests that these two proteins are linked to the insoluble organic matrix by disulfide bridges because the extraction yield increases when β-mercaptoethanol is added to the medium.     

硅酸盐与硫铝酸盐矿物复合水泥材料的研究进展

阐述了阿利特-硫铝酸盐水泥、贝利特-硫铝酸钙钡水泥的研究、进展及目前研究的热点。同时对以阿利特-硫铝酸钙钡为主导矿物的新型高胶凝性水泥材料进行了展望。