The complete mitochondrial genomes sequences of Asio flammeus and Asio otus and comparative analysis

Mitochondrial DNA (mtDNA), as a model sys-tem, has been extensively used for molecular phy-logenetic and evolutionary analysis[1]. With the ad-vances in DNA sequencing technology, more andmore researchers prefer to use complete mitochondrialgenome for phylogenetic analysis[2—4]. Since the com-plete sequencing of human mtDNA in 1981 (Andersonet al., 1981)[5], 342 vertebrate mitochondrial genomeshave so far been sequenced. Up to now the completesequences of 29 avian mitochondrial genomes h…     

穿心莲内酯体外抗白念珠菌生物膜作用的初步研究

目的研究穿心莲内酯对体外白念珠菌生物膜的影响。方法采用XTT减低法评价穿心莲内酯对白念珠菌生物膜及其黏附性的影响;镜下观察该药对白念珠菌生物膜的形态学影响;细胞毒性试验检测该药的毒副作用。结果穿心莲内酯对白念珠菌生物膜的SMIC50、SMIC80分别是250、1000μg/ml;1000μg/ml及100μg/ml时对白念珠菌的早期黏附及菌丝生长有抑制作用;对人细胞毒性较弱。结论穿心莲内酯对体外白念珠菌生物膜有显著的抑制作用。     

陆地棉的核型模式

陆地棉的核型公式为2n=4x=52=30m+20sm(4SAT)+2st(2SAT); 染色体绝对长度平均3.40μm; 臂比值最大与最小的分别是4.02和1.14,平均1.77;随体3对,分别位于第12、19和26对同源染色体的短臂上;最长与最短染色体的比值为2.36;其核型属于Stebbin的2B类型。 Abstract:Karyotype formula of Gossypium hirsutum L.was 2n=4s=52=30m+20m (4SAT)+2st (2SAT); and its absolute lengths of chromosomes averaged 3.40μm; arm ratio differed from 1.24 to 4.02,with the mean value of 1.77; three pairs of satellite chromosomes; the ratio of the longest to the shortest chromosomes was 2.36; and the karyotype belonged to 2B in Stebbin’s classification.     

罕见的46，X，inv(Xq)伴原发闭经一例

X染色体数目及结构异常是原发性闭经的重要原因。在各类X染色体结构异常中,未见有关X染色体长臂的臂内倒位方面的报道。我室在1555例(男832例,女723例)染色体检查的患者中发现了一例,现予报告。     

一种简单、经济的植物RNA抽提方法

一种简单、经济的植物ＲＮＡ抽提方法孟玲谭德勇王焕效吕朝晖王晓燕周翔（云南大学生物系,昆明６５００９１）ＡＳｉｍｐｌｅＥｃｏｎｏｍｉｃａｌＭｅｔｈｏｄｆｏｒｔｈｅＩｓｏｌａｔｉｏｎｏｆＰｌａｎｔＲＮＡＭＥＮＧＬｉｎｇＴＡＮＤｅｙｏｎｇＷＡＮＧＨｕａｎｘ...     

The effects of proteasome inhibitor lactacystin on mouse oocyte meiosis and first cleavage

Many studies have shown that the ubiq-uitin-proteasome pathway (UPP) for the degradation of short-lived proteins plays a key role in regulating cell cycle progression[1—3]. At least two distinct prote-olytic pathways are required for cell cycle process. The first pathway promotes transition from G1 to S phase, and the second initiates the onset of anaphase and exit from mitosis. The inhibition of UPP will re-sult in the blockage of cell cycle process. The knowl-edge of the role of UPP in…     

Complete Genomic Sequence Analysis of a New SV40 Isolate

The genome of a new SV40 strain (SV-IMB) isolated from a rhesus monkey was completely sequenced and compared with other isolates. The results showed that the whole genome contains 5246bp, and the average identity of SV-IMB was 98.1% as compared to other SV40 isolates. Its regulatory region is composed of a complete enhancer and a defective enhancer. Amino acid changes occurred to some extent in both the large T antigen (T-Ag) and VP1 region. The findings demonstrate that the SV-IMB is a new SV40 isolate.     

Sex differences in morphine-induced behavioral sensitization and social behaviors in ICR mice

Gender and genetic strain are two prominent variants that influence drug abuse. Although certain sexrelated behavioral responses have been previously characterized in ICR mice, little is known about the effects of sex on morphine-induced behavioral responses in this outbred strain. Therefore, in this study, we investigated the sex differences of morphine-induced locomotion, anxiety-like and social behaviors in ICR mice. After morphine or saline exposure for four consecutive days(twice daily), increased locomotion, more time spent in the central area, as well as attenuated rearing and self-grooming behaviors were found in morphine-treated females in an open field; no differences were found in locomotion and the time spent in the central area between male and female controls. When interacting with the samesex individuals, female controls were engaged in more social investigation, following, body contacting and self-grooming behaviors than controls; morphine exposure reduced contacting and self-grooming behaviors in females; in contrast, these effects were not found in males. These results indicate that female ICR mice are more prosocial and are more susceptible to morphine exposure than males.     

贵州小型猪肠菌群失调模型的制备

目的 探索小型猪肠菌群失调模型的制备方法.方法 分别采用大黄和氨苄青霉素灌服,通过检测贵州小型猪新鲜粪便中双歧杆菌、乳酸杆菌、肠杆菌、肠球菌的数量,了解其肠菌群变化情况.结果 两种方法都可导致贵州小型猪肠菌群改变.两组相比,大黄组菌群变化速度较快、持续时间较短;氨苄青霉素组菌群变化速度较慢、持续时间较长.结论 两种方法均可制备比较稳定的贵州小型猪肠菌群失调模型,但具体表现不尽相同,应用时可根据需要选择.     

不同地区田间草地贪夜蛾卵巢的结构和发育

【目的】探明田间草地贪夜蛾Spodoptera frugiperda卵巢的发育状态及其变化,为草地贪夜蛾种群的发生和迁飞动态提供精准监测依据。【方法】采用雌性生殖系统解剖法,比较不同日龄和地区的田间草地贪夜蛾雌蛾卵巢的形态差异,分析卵巢成熟状态与雌蛾交配的关系。【结果】草地贪夜蛾雌蛾生殖系统包含卵巢、输卵管、交配囊、导精管、受精囊、附腺和产卵器。根据形态特征可以将田间草地贪夜蛾卵细胞分为卵黄发生前期、卵黄期和成熟期3个时期。田间雌蛾1日龄卵巢中发育最快的卵仅处于卵黄期中期,卵巢管柄为空;3日龄卵巢出现分化,一部分卵巢仍然和1日龄相似,另一部分卵巢中存在成熟卵;这种卵巢发育分化到羽化后11 d时仍然存在。云南江城、弥勒,广西田阳以及浙江瑞安和镇海等地的田间雌蛾,到死亡时分别有61.5%, 51.7%, 41.7%, 42.1%和35.5%卵巢发育不成熟。室内饲养第1代雌蛾中,有39.6%的个体到死亡时卵巢未发育成熟,和田间雌蛾比例相似。交配雌蛾卵巢可以是发育成熟和未成熟的,但是未成熟卵巢的比例仅为18.0%±5.0%。【结论】结果提示同一代次的田间草地贪夜蛾可能同时存在迁飞和非迁飞个体,...