自动感应照像系统在野生动物调查中的应用

在野生动物调查工作中, 使用自动感应像机系统虽然已有较长的历史(Dodge 等1960), 但仅在最近其技术进步之后才得到广泛应用(Seydack, 1984; Kucera等，1993). 至此前, 中国未见具体应用的报道. 这种技术对于记录野生动物, 尤其是野生兽类物种的存在和监测是很适合的。

Compliant shell mechanisms.

This paper describes a class of lightweight structures known as compliant shell mechanisms. These are novel reconfigurable solutions for advanced structures, such as morphing shells and deployable membranes. They have local, discrete corrugations, which articulate and deform to achieve dramatic changes in the overall shape of the shell. The unique kinematics are considered by highlighting examples and by performing analysis using established and novel concepts, and favourable predictions of shape compared with laboratory models are demonstrated.

The reproductive strategies of an endemic Tibetan fish, Gymnocypris selincuoensis

The reproductive traits of Gymnocypris selincuoensis from Selincuo Lake and its tributaries were investigated in 1997 and 1998. The youngest mature male was age 7 with a standard length (SL) of 172.0 mm, and the youngest mature female was age 8 with a SL of 194.0 mm. The L(50)s Of SL and age at first maturity were respectively 250.32 mm and age 9 for males and 224.71 mm and age 8 for females. The gonadosomatic index (GSI) significantly changed with seasons for mature individuals but not for immature individuals. GSIs of mature females at stages IV and V of ovary development increased with SL and reached a maximum value at the SL range from 370 mm to 390 mm; the GSIs of mature males were negatively correlated with SL. The breeding season lasted from early April to early August. Egg size did not significantly change with SL but increased with the delay of spawning. The individual absolute fecundity varied from 1,341 to 28,002 eggs (mean 12,607+/-7,349), and the individual relative fecundity varied from 6.4 to 42.0 eggs.g(-1) (mean 25.5+/-9.7). The individual fecundity increased with total body weight; it also increased with SL for those of SL less than 370 mm. There was a rest of spawning for mature individuals.

New evidence for the origin and behaviour of deep ocean 'crusts'

In situ tests in deep waterWest African clays show crust-like shear strengths within the top few metres of sediment. Typical strength profiles show su rising from mud-line to 10 kPa to 15 kPa before dropping back to normally consolidated strengths of 3 kPa to 4 kPa by 1.5m to 2m depth. A Cam-shear device is used to better understand the mechanical behaviour of undisturbed crust samples under pipelines. Extremely variable peak and residual shear strengths are observed for a range of pipeline consolidation stresses and test shear rates, with residual strengths approximating zero. ESEM of undisturbed samples and wet-sieved samples from various core depths show the presence of numerous randomly-located groups of invertebrate faecal pellets. It is therefore proposed that the cause of strength variability during shear testing and, indeed, of the crust's origin, is the presence of random groups of faecal pellets within the sediment. © 2011 Taylor & Francis Group, London.

化学分类法在有害水华生物分类鉴定中的应用

在综合分析有害水华生物分类鉴定方法研究概况的基础上,阐述了基于光合色素和其它生化标志物的化学分类方法在水华生物检测和鉴定方面的应用,讨论了基于叶绿素a成分分析的监测鉴定技术和基于色素荧光分析的流式细胞技术(FCM)在水华生物化学分类上的优势和特点。相关的分析表明化学分类法能有效地用于对不同属的有害水华生物进行分类鉴定,甚至也能对相同属和种的不同细胞株进行鉴定识别,从而对有害水华生物的鉴定提供较为丰富的分类信息。

Hydrogen sensor based on silicon carbide (SiC) MOS capacitor

Silicon carbide (SiC) based MOS capacitor devices are used for gas sensing in high temperature and chemically reactive environments. A SiC MOS capacitor structure used as hydrogen sensor is defined and simulated. The effects of hydrogen concentration, temperature and interface traps on C-V characteristics were analysed. A comparison between structures with different oxide layer types (SiO2, TiO2 and ZnO) and thicknesses (50..10nm) was conducted. The TiO2 based structure has better performance than the SiO2 and ZnO structures. Also, the performance of the SiC MOS capacitor increases at thinner oxide layers. © 2012 IEEE.

豆粕和土豆蛋白替代饲料中鱼粉对异育银鲫生长及能量收支的影响

利用全能量收支同步测定呼吸仪系统测定了三种不同蛋白源 (鱼粉、豆粕、土豆蛋白 )饲料对银鲫生长及能量收支各组分的影响。对照饲料全部以鱼粉为蛋白源 ,另两种饲料中3 0 %的蛋白质分别来自豆粕和土豆蛋白。试验结果表明 ,银鲫对三种蛋白源的饲料的摄食率 ,食物转化效率均有显著差异 ,以鱼粉组最高 ,豆粕其次 ,土豆蛋白最低。能量收支各组分也均有显著差异 ,能量收支式如下 :鱼粉　 88 1C =1 3 77F +2 95U +2 4 1G +41 8R豆粕　 1 0 2 3C =1 7 1F +2 8U +1

武汉东湖表层沉积物有机物污染状况

2 0 0 0年 12月在武汉东湖采集了 5个表层沉积物样品 ,采用气 -质联用分析了其中的有机污染物 ,以探讨东湖沉积物受有机物污染的程度 .共检出有机物 180种 ,其中环境优先控制污染物和美国EPA筛选的内分泌干扰物 35种 .有机污染严重程度为 :水果湖区 >郭郑湖南湖区 >郭郑湖北湖区 .

雌核发育银鲫两个不同品系线粒体DNA比较

于 1 996年 4月在中国科学院水生生物研究所关桥实验场取得银鲫E系 ( 8♀ ,2♂ )和D系 ( 9♀ ,1♂ )的卵巢 (♀ )或肝脏 (♂ )组织 ,分离纯化其线粒体DNA ,以此为材料 ,用 2 5种限制性内切酶分析了银鲫这两个雌核发育系的线粒体DNA ,构建了两系鱼mtDNA的 1 9种酶 41个位点的酶切图谱。统计比较酶切片段的大小 ,发现 5种内切酶 (AvaⅡ ,BamHⅠ ,BglⅠ ,SphⅠ ,XbaⅠ )酶切位点在两个雌核发育系间存在差异。这些多态性 ,既可以作为区分两个雌核发