Historical evidence of abrupt coastal climatic change in Southern California, 1790-1880

Historical sources of the late-18th and 19th centuries were searched for information on coastal weather conditions in Southern California. Relatively calm winters until 1828 were followed by unusually stormy winters from about 1829 to 1839. Later periods were again predominantly calm, with notable exceptions related to the ENSO events of 1845 and 1878. Following decreases through the stormy 1830s, sizes of kelp forests appear to have rebounded in the 1840s. ENSO occurrences and eruption of the volcano Cosiguina in 1835 are likely causes for changing wind patterns. Our results link the unique AD 1840 Macoma leptonoidea pelecypod shell layer in laminated Santa Barbara Basin sediment ("Macoma event") to abruptly changing oceanographic and weather patterns.

Fishes of Ceylon: a catalogue, key and bibliography

A knowledge of the specific composition of Ceylon fish fauna is essential to any programme of development of commercial fisheries, or the study of Ceylon's ichthyology and the need for cataloguing it has been keenly felt for many years. The need for cataloguing the whole of Ceylon's flora and fauna was stressed by the Natural Science Section of the Ceylon Association for the Advancement of Science during its 1952 annual sessions and it was then that the writer agreed to help satisfy this need by compiling an up-to-date check list of species of two families of fishes, the Clupeidae and the Carangidae, which are important in the beach seine fishery which he was studying at that time. In the course of this work it was decided to expand the check-list to make it comprehensive of all species of fish that have been recorded from Ceylon to date and to supply keys for their identification. This has involved a screening of the pioneer works of Bennet (1834) and Day (1878-1889) and the many subsequent references to Ceylon fish scattered through various scientific journals and other publications, some of them long out and now almost unobtainable.

Nortriterpenoids from Schisandra wilsoniana

Three new highly oxygenated nortriterpenoids, wilsonianadilactones A-C (1-3), together with twelve known ones, i.e., 4-15, were isolated from the leaves and stems of Schisandra wilsoniana. Their structures were established by means of extensive analysis o

入侵生物金苹果螺在滇池流域的首次记录

2004年10月,中国科学院昆明动物研究所首次发现金苹果螺(Pomacea canaliculata)入侵重要的水源保护区嵩明白邑黑龙潭.金苹果螺起源于中南美洲,在亚洲,它通过有意或无意的传播而逐渐扩散到菲律宾、越南、泰国、老挝、柬埔寨、马来西亚、印尼、巴布几内亚、韩国、日本和中国的南部.金苹果螺已成为水稻产区的最大害虫,给农业生产带来巨大的损失.为防止金苹果螺在云南扩散,目前已经实施了严格的预防、控制措施,同时开展了公众保护教育宣传活动.

用于制作亚洲象姿态标本的象皮处理方法

本发明是一种用于制作亚洲象姿态标本的象皮处理方法。即：象皮在转鼓中加入渗透剂和常温水转20分钟后，水洗，再加渗透剂和漂白粉转30分钟，水放干后加入水和工业盐，转10分钟；用甲酸稀释后加入转鼓中，转20分钟；用硫酸水稀释后分两次加入转鼓中，每次转20分钟；然后静置过夜；用甲醛稀释后加入转鼓中，转1小时后静置24小时，甲醛水放出；铬粉加入转鼓中兑水至满转鼓转3小时，静置24小时；甲酸钠稀释后加入转鼓中转2小时；小苏打稀释后分4次加入转鼓中，每加一次转20分钟，静置24小时后出鼓；用砒霜膏均匀的涂抹于象皮内侧，即得制作标本的象皮。此法处理后的象皮柔软，基本不变色，易于整姿，干后仍具一定弹性。

吸毒人员瞳孔动态变化快速检测方法及其装置

一种吸毒人员瞳孔动态变化快速检测方法及其装置，属神经生物学检测装置。本发明将瞳孔的图像数据以视频信号的方式传至计算机上的视频信号采集卡，通过视频模数转换变成数字信号做进一步图像处理；和数据库进行比较，最终对被试是否吸毒做出判别。该装置由眼镜和计算机组成；其中：眼镜上装有塑料的遮光眼罩(1)，固定在塑料的遮光眼罩(1)上的一个红外微型近摄摄像头(3)，其两侧LED构成的红外线光源(2，4)，以及位于遮光罩右边的3个红色发光二极管(5，6，7)；计算机内装有数据采集和处理软件。具有抗干扰性强，结构轻便，操作简单方便、快速、无污染、易监控并能在禁毒、防止爱滋病扩散的过程中普及使用，具很大的实用性等优点。

Theoretical model for dicke superradiance in a semiconductor laser device

A theoretical model for Dicke superradiance (SR) in diode lasers is proposed using the travelling wave method with a spatially resolved absorber and spectrally resolved gain. The role of electrode configuration and optical bandwidth are compared and contrasted as a route to enhance femtosecond pulse power. While pulse duration can be significantly reduced through careful absorber length specification, stability is degraded. However an increased spectral gain bandwidth of up to 150 nm is predicted to allow pulsewidth reductions of down to 10 fs and over 500-W peak power without further degradation in pulse stability. © 2011 IEEE.

中国淋巴囊肿病毒胸苷酸合酶基因结构特点及分析

胸苷酸合酶(Thymidylate synthase, TS)是进行 DNA 合成所必需的酶类,与细胞分化及肿瘤发生密切相关。淋巴囊肿病毒属于虹彩病毒科成员,是能引起百余种淡、海水鱼感染,并产生肿瘤的病毒病原。在已完成中国淋巴囊肿病毒株 (Lymphocystis disease virus-China, LCDV-C) 基因组序列测定的基础上,本文对位于 LCDV-C 基因组开放阅读框 ORF 011L 的 TS 基因结构、及其推定蛋白结构进行了分析。该基因全长 858bp,GC 含量为 28.2%,编

中国活泼泥溞(甲壳纲:双甲目)之考正

<正> 从1990年4月11日采自江西省贵溪县一个池塘的浮游生物标本中,检出雌性泥溞(Ilyocryptus)8个,鉴定为活泼泥溞(I.agilis Kurz,1878)。主要特征为: 体长0.60—0.86mm。侧面观略呈梨形,头窄小而后缘很宽大。壳面无遗留的蜕皮,不

方口鲃属鱼类一新种(鲤形目:鲤科)

本文记述采自云南的鲤科鱼类一新种。Sauvage(1878)以上下唇具乳突等特征建立了方口鲃属Cosmochilus,迄今共3个种。新种命名为南腊方口鲃C.nanlaensis sp.nov.以乳突不发达、呈绒毛状;第一鳃弓鳃耙稀疏;上颌须呈退化状,口角须亦不发达;背鳍末根不分枝鳍条较短;侧线鳞数目偏少等特征易与本属其他种类相区别。文末附本属鱼类之检索表。

谈谈藻类毒素

<正> 早在1878年就有关于有毒蓝藻使动物中毒的报道。廿世纪以来,产毒藻类引起人、畜中毒的事件在世界许多国家和地区均有发生。如1916年,在美国佛罗里达西海岸,许多人曾因甲藻中毒而出现呼吸系统的病状;由于供水系统中的藻类毒素引起人们消化道疾病的事例为数不少,Lippy和Erb 1976年报道的一起肠道疾病的暴发流行即是与水库中的一种丝状蓝藻——裂须藻的大量生长有关,毒性藻华造成鱼类和其它动物中毒和死亡,在经济上带来损失的事例不胜枚举。仅美国Storm湖因水华鱼腥藻毒性藻华使大量禽类及松鼠、狗、猫等动物中

微瘤孟氏藻(新种)静孢子的形成

<正> 在孟氏藻属(Mougeotia)中的一些种类,它们是完全以静孢子营生殖的。以往的藻类学家对于此种孢子的形成过程有不同的意见:如 Hassall(1845)、Wittrock(1878)、W.及G.S.West(1902)和 Czurda(1931)等氏认为此种孢子在形成过程中,孢子母细胞的内含物要发生分裂,接着又进行接合。

Description of two new myxosporean species parasitic in freshwater fishes from the Yangtze River in China

Two new species of myxosporeans (Myxosporea: Myxidiidae), Myxidium tuanfengensis sp. n. and Zschokkella saurogobionis sp. n., Parasitic in freshwater fishes collected from the Yangtze River of China are described in this paper. M. tuanfengensis was found in the liver parenchyma and intestine lumen of Leptobotia taeniops Sauvage, 1878, while Z. saurogobionis was found in the gall bladder of Saurogobio dumerili Bleeker, 1871. The diagnostic characters of M. tuanfengensis are: round or elliptical polysporous plasmodia averaging 118 mum in size; spore oval in frontal view with smooth surface and nearly spindle-shape in sutural view with slightly sinuous sutural ridge, averaging 19.5 x 9.75 x 8.9 mum in size; two large spherical polar capsules 6.8 mum in diameter, with polar filament wound in 4 to 5 coils. The diagnostic characters of Z. saurogobionis are: spore elliptical in both frontal and sutural view measuring 18.3 x 9.8 x 10.8 mum in size; fine sutural ridge in S-form, spore shell marked with 10 to 12 distinct lines paralleled with the sutural line; two spherical polar capsules, 6.7 mum in diameter, with polar filament in 5 coils.