STUDIES ON REPRODUCTION IN MOLE RAT (MYOSPALAX FONTANIERII MILNE—EDWARDS)

Mole rat (Myospalax fontanierii Mile—Edwards) is one of the destructive animals to the pasture of Qinghai plateau. We had obrerved the reproduction of this rat at Men Yuan Horse—Breeder Ranch from 1977 to 1978. The altitude of Men Yuan Horse—Breeder Ranch is over 3200 m. It is at the eastsouth foot of Qilian mountain and belongs to the cold moist climate.     

进化论系列讲座(十二) 达尔文——(三)自然选择

正如前所述,正是随同"贝格尔号"巡洋舰环球考察其间目击到的一些事实,尤其是加拉帕戈斯群岛上的鸟类及其他生物显示出来的性状差异,使达尔文"深受感动"。达尔文当时就思索:"显然可知,只有依据一种推测,就是物种在逐渐地发生变异,才可以去解释这一事实以及其他很多事实。""可是,同样也显明可知,不论是周围环境的作用,或者是生物的意志(特别是就植物而言),都不能够解释各类生物极其良好地适     

ADDITIONAL STUDY ON SINOGNATHUS GRACILIS (CYNODONTIA; REPTILIA)

<正> Although the non-tritylodont cynodonts had been fully flourished in Permian and Triassic age, yet Sinognathus gracilis was the sole representative so far in China.     

Synthesis of (S)-(—)-Vertinolide

(S)-(?)-Vertinolide 1 was synthesized via the tetronic acid derivative 6 from (S)-(?)-tetrahydro-2-methyl-5-oxo-2-furancarboxylic acid 3. (±)-Vertinolide was also synthesized from (±)-3.     

珠穆朗玛峰动物考察(1958—1959)纪实(3)

根据当年亲身经历及考察日记,真实记录了我国科考队动物组于1958年第1次攀登并考察珠穆朗玛峰情况,介绍了所发现的我国鸟类和哺乳动物新纪录和新亚种,以及首次证实并确认的卡玛河谷等地在世界动物地理区划上的具体区界。     

珠穆朗玛峰动物考察(1958—1959)纪实(2)

根据当年亲身经历及考察日记,真实记录了我国科考队动物组于1958年第1次攀登并考察珠穆朗玛峰情况,介绍了所发现的我国鸟类和哺乳动物新纪录和新亚种,以及首次证实并确认的卡玛河谷等地在世界动物地理区划上的具体区界。     

珠穆朗玛峰动物考察(1958—1959)纪实(1)

根据当年亲身经历及考察日记,真实记录了我国科考队动物组于1958年第1次攀登并考察珠穆朗玛峰情况,介绍了所发现的我国鸟类和哺乳动物新纪录和新亚种,以及首次证实并确认的卡玛河谷等地在世界动物地理区划上的具体区界。     

OPERATIONS ON THE PANCREAS—Some Technical Considerations

Many diseases of the pancreas formerly universally considered fatal, now are known to be amenable to surgical therapy. Pancreatic cysts, pseudocysts, calculi, inflammation, and benign and malignant tumors all can be dealt with effectively by operation. In this presentation various surgical techniques which have proved to be of therapeutic importance are considered.     

STUDIES ON THE GENUS ZELE CURTIS (Hymenoptera: Braconidae: Euphorinae)

Nine new species of Zele Curtis are described from India. The genus Zele Curtis (Euphorinae: Meteorini) consists of usually moder-ate sized, dark coloured insects. This genus has no far been reported from:Oriental region by only one species viz., Zele niveitarsis (Cresson) (VanAchterberg, 1979). Earlier two species were reported under this genus byNixon and Lyle viz., Zele elagabalus Nixon and Zele infumator Lyle. Later     

THE DINOSAUR PROJECT——AN INTERNATIONAL COOPERATIVE PROGRAM ON DINOSAURS

<正> The dinosaurs of China are among the most exciting in the world. An appreciation of the anatomy of Chinese dinosaurs has become a central element in modern studies of dinosauriah evolution (Russell 1987), and the world's palaeontologists have paid a great deal of attention to China because of her abundant dinosaur resources. The Dinosaur Project, originally called the Canada-China Dinosaur Project (CCDP), was organized in 1985. In that year, the Ex Terra Foundation, Alberta, signed an agreement establishing the project with three core partners: The Tyrrell Museum of Palaeontology in Drumheller, The Natiolaal Mu-     

进化论系列讲座(十一) 达尔文——(二)改变个人与世界的航行

正达尔文带着《圣经》及对其的虔诚登上了贝格尔号,他那正统的基督徒形象最初常常招致水手们的取笑。但这样的情形随着航程一站又一站的延续在逐渐地改变。改变源于他随身携带的另一本书——莱伊尔的《地质学原理》第一卷,书是行前亨斯罗作为礼物送给他的。海上的航行漫长乏味,达尔文还倍遭晕船的折磨。《地质学原理》成了他忘却痛苦的最佳良药,因为书中描绘的"沧海桑田"给他打开了一个审视世界的全新视角。     

Jure Piskur (1960—2014)

<正>Following a short struggle against an aggressive cancer,Prof.Jure Piskur(Fig.1),a professor of molecular genetics at Lund University(LU),Sweden,and the University of Nova Gorica(UNG),Slovenia,died in his home in Lund on 18 May 2014.He leaves behind his lifelong partner and wife,Judita Gartner,and their sons,Jan and Jure.Jure Piskur was born in 1960 in Slovenia,at that time part of Yugoslavia.Even when Jure’s research led him to many countries and the last quarter of a century to Scandinavia,he always kept close contact with his home country.He was proud to have participated in the Slovenian independence movement,which led to its international recognition as a sovereign state in     

第米特里·纳索诺夫(1895—1957)

1957年12月21日,苏联科学院通讯院士,苏联医学科学院院士,伟大的细胞学家第米特里·尼古拉耶维茨·纳索诺夫((?))教授,正值他创造力的盛期,于列宁格勒逝世了。他的逝世使世界生物学界遭受了沉重的损失。纳索诺夫是细胞学最重要、杰出学派的领袖,一位天才的教师,一位终生献身于科学的人士。纳索诺夫于1895年7月10日诞生于华沙动物学教授H.B.纳索诺夫(以后成为科学院院士)的家里。1919年,他在彼得格勒大学理学院自然科学系毕业,在那里,他作助教、讲师、教授一直工作到生命的终点。纳索诺夫是在卓越的俄罗斯组织学家A.C.道奇尔     

THE EFFECTS OF TEMPERATURE ON SEXUAL DIFFERENTIATION IN THE TEMPERATURE SENSITIVE THELYGENIC—INTERSEXUAL OFFSPRING OF ORCHESTIA GAMMARELLUS (PALLAS) (AMPHIDOPA; CRUSTACEA

An increase in temperature to 25 or 30°C during embryonic development and the first stages of post-embryonic development in the temperature-sensitive thelygenic offspring of Orchestia gammarellus, brings about a higher male ratio in the broods, that is to say weakens or cancels the action of the feminising factor. The effect appears much earlier at 30 than at 25°C. At 30°C, the results achieved partly depend on the stage of embryonic development during which the heat treatment is applied. The more sensitive stages correspond to gastrulation and the formation of germ layers. The sensitivity to the increased temperature depends on the sexual genotype of the individuals: the 2AYY are more sensitive than the XY animals.