一株猴泡沫病毒野毒Pol基因的cDNA的直接测序

A 377 Kunming cell line of Rhesus Monkey Kidney (RMK) from Centre for Medical Pr imates was amplified the cDNA fragments of the pol gene by Nested-PCR,which of a natured infected SFV showed typical CPE after cultured for three weeks,sequence s of products position(nt 5989-6343)were determined directly.The result indicate d that the nucleotid sequences in the region had 48 nucleotids difference(10.78% ) between SFV infected cell and SFV-1 in GENE BANK,and there was 45 nucleotides difference(10.11%) compared with SFVmac in the region, the test with VspⅠ showe d aligment.     

湖北省黑头蜈蚣一新种(唇足纲:蜈蚣目:蜈蚣科)(英文稿)

　In this study,Scolopendra negrocapitis sp.nov.is described.It obviously differs from S.japanica L.Koch distributed over the inland of Japan,in characters of the prefemur of last legs about two times as long as broad and comparatively stout than that of the latter.Statistics show that their ventral thorns of last legs usually 3 at the outer and 2 at the inner sides,and this mode in the materials is about 90 per cent.     

曼盲蝽属中国种类研究(盲蝽科:单室盲蝽亚科)(英文稿)

　In this paper,7 new species of genus Mansoniella are describedM.annulata sp.nov.,M.cristata sp.nov.,M.elongata sp.nov.,M.flava sp.nov.,M.juglandis sp.nov.,M.rosacea sp.nov.,M.rubida sp.nov.; 3 new combinations are suggestedM.cinnamomi(Zheng et Liu, 1992), comb.nov., M.sassafri(Zheng et Liu,1992), comb.nov.,M.wangi(Zheng et Li, 1992), comb.nov..The type specimens are deposited in the Department of Biology,Nankai University, Tianjin, China.     

Estimation of larval dry weight of Chaoborus americanus

A method for estimating larval dry weight as a function of tracheal front air sac length and instar was developed for second, third, and fourth instar Chaoborus americanus using linear regression analysis. The following equation: where W = larval dry weight (μg), L = front air sac length (mm), a = the y-intercept, and b = the slope provided accurate estimates of larval dry weight for three C. americanus populations. No detectable change in size occurred in the air sacs of larvae preserved for one year in 5% formalin. This indicates that air sacs can be used to accurately estimate larval dry weight for preserved as well as living specimens.     

Chromosomal replication in Drosophila virilis

DNA fiber autoradiography was used to determine parameters underlying the DNA replication of the eukaryotic chromosome in Drosophila diploid brain cells in organ culture. The average rate of fork movement, estimated from 4 different labelling intervals, is 0.35 μm/min at 25 ° C. Of the tandem arrays 93% show patterns which are compatible with bidirectional replication, 7% show unidirectional replication. The unidirectional mode of replication is interpreted as being a consequence of the experimental schedule (using hot-cold pulse labelling) combined with the occurrence of termination signals. — Some autoradiograms showed the expected two grain tracks of different densities; others showed only a high density track. The latter were most prominent in arrays of short replicons (<10 μm) which correlate with replicating satellite sequences. — The majority of replicons fall into size classes < 100 μm. The frequency distribution is skewed towards larger replicon sizes; it spans 2–238 μm, has a mean of ˉx = 35.6 μm and a median of = 21.0 μm. If the distribution is corrected for supposed satellite replicons, the median increases to = 31.0 μm. — In experiments using warmhot pulse labelling, arrays were scored which must have been a consequence of fixed termination signals. Furthermore, grain tracks diverging from weak labelled centers often have different lengths, indicating that these replicons contain two diverging replicating sections of unequal length. Presented to Professor Dr. Wolfgang Beermann on the occasion of his 60th birthday with my best wishes     

山东山旺新发现的中新世松鼠类化石

<正>Three forms of Sciuridae, Tamiops asiaticus (Qiu, 1981) , Sciurus lii sp. nov. , and Oriensciums linquensis gen. et sp. nov. are described from the early-middle Miocene Shanwang Formation at Linqu, Shandong Province. Comparisons of Tamiops asiaticus with Meinia asiatica Qiu, 1981 suggest that neither the size nor the morphology of the bodies and dentition allows the two genera to be distinguished. The genus name Meinia Qiu, 1981 is therefore considered a junior synonym of Tamiops Allen, 1906. S. lii is one of the earliest records for the genus Sciurus . Some isolated teeth from the early Miocene locality Sihong, previously referred to Shuanggouia lui show similarities to S. lii and are assigned to the genus Sciurus in this paper. Redetermination of Shuanggouia argues convincingly for its assignment to Sciurinae rather than Petauristinae. Oriensciurus linquensis exhibits some characters similar to Sciurus in the upper cheek teeth, and to Spermophilinus in the lower ones. The overall dental features, however, group the new genus with tree squirrels. The Shanwang fossil sciurid association highly suggests the Shanwang area was a forest biotope during the Miocene, and indicates an obviously "Transitional Zone" between the modem Oriental Region and the Palearctic Region.     

Studies on mineral ion absorption by plants

Summary The relative yield response and phosphate uptake ofS. humilis, P. atropurpureus andD. intortum, grown on a very deficient soil, enriched with phosphate, were measured at four successive harvests during 42 days growth under controlled environmental conditions. Except at the first harvest (19–21 days), the relative yields ofS. humilis andP. atropurpureus at P₀ were identical, and slightly greater than that ofD. intortum; the relative response to applied phosphate was similar for the three species, up to the maximum yield attained. The higher relative yield ofD. intortum, at harvest 1, reflected the influence of a higher initial phosphate concentration in the small Desmodium seedling, compared toS. humilis andP. atropurpureus. The mean absorption rate for phosphate ofD. intortum, and to a lesser degreeS. humilis andP. atropurpureus, showed two distinct maxima: an initial peak at low soil activities (0.3 — 3μM P), and a second at higher soil activities (37–43μM P) when maximum yield had been attained, and luxury accumulation of phosphate appear to occur. The initial peak in was followed by a decline (significant (P=0.05) forD. intortum) at soil phosphate activities corresponding to maximum yield, suggesting that the rate of absorption by the roots was influenced by the demand for phosphate created within the growing plant. Mean absorption rates and relative growth rates , averaged over all phosphate levels, fell in the orderD. intortum >S. humilis >P. atropurpureus. Conversely, the efficiency of phosphate utilization by the plant, which may be expected to be greater in plants of low RGR, fell in the orderP. atropurpureus >S. humilis >D. intortum, and so counteracted the lower ofP. atropurpureus, and to a lesser extent,S. humilis. However,S. humilis had the advantage of a lower retention of phosphate in the root system, compared toP. atropurpureus, due to a relatively greater shortage of nitrogen in the tops when grown on symbiotically-fixed nitrogen.     

BUNOLISTRIODON INTERMEDIUS (SUIDAE, ARTIODACTYLA) FROM TONGXIN, NINGXIA

<正> From the same beds in the east of Tongxin County, Ningxia Hui Autonomous Region, where the large Kubanochoerous had been found (Qiu et al., 1988), some Bunolistriodon jaws and teeth were recently discovered. These specimens have been assigned to B. intermedius. The new material enables us to discuss in more detail the possible relationships between the so-called intermediate "Listriodon" and lophodont listriodons.     

FIRST DISCOVERY OF MEGACEROS (MAMMALIA) IN NINGXI

<正> When I was working in Ningxia Hui Aotonomous Region in 1974, a geologic engineer of Geologic Bureau of Ningxia gave me a fossil mammalian specimen and asked me to identify it. This is the first discovery of Megaceros in Ningxia.     

毛壳属的一个中国新记录种

<正>A Chaetomium specimen isolated from sheep wool in the glacier park of Akto County, Kizilsu Kirgiz Autonomous Prefecture, Xinjiang Uygur Autonomous Region of China in 2007,