缅甸蟒脂肪酸分析

用气相色谱法测定了缅甸蟒油20种脂肪酸,其中不饱和脂肪酸含量达67.5%,多不饱和脂肪酸含量达10.3%.含量较高的脂肪酸有油酸、棕榈酸、亚油酸、棕榈油酸,特有脂肪酸DHA、α-亚麻酸,并且明显不同于其他蟒和蛇的脂肪酸含量.缅甸蟒油具有重要的药用和保健品开发利用价值.     

蟒蛇的孵卵行为观察

本文观察总结了１９８３，１９９０，１９９１年在动物园内饲养的蟒蛇产卵、孵化及胚胎发育过程。发现蟒蛇具有特殊的异于其它蛇类的孵卵行为。孵卵的亲蟒在孵化期间产生一种节律性的全身肌肉挛缩，使其体温明显高于未孵卵蟒和环境温度。但这种挛缩运动对于蟒卵孵化的意义还有待进一步观察。     

千娇百媚宠物蛇

<正>宠物蛇就是经过人工培养的无毒蛇,性情温和,对人的攻击性很小。从小养起的宠物蛇,还很容易和主人培养感情。宠物蛇由于品种的不同,饲养要求也略有差别。大型宠物蛇品种有黄金蟒、缅甸蟒、红尾蚺等,它们体长可达3米     

蟒的人工饲养初探

本文对2001～2007年先后饲养于成都动物园的14条蟒的食性、行为和护理等进行了观察。分析结果为,蟒行为活动受季节和气温变化影响大,夏季活动与休息的比例为1∶9;冬季活动与休息的比例仅1∶60。人工饲养的适宜温度为25～30℃,相对湿度为50%～90%;安全越冬的基础温度为20～22℃,相对湿度60%～90%。可以自主采食兔子、鸡、鸭和大白鼠等活体动物,而人工填食可用牛肉、精猪肉。易患寄生虫、口腔炎、感冒并继发肺炎等疾病,人工饲养难度较大。     

灰飞虱室内大量繁殖及越冬饲养方法

灰飞虱Laodelphax striatellus(Falln)作为多种植物病毒病的传毒介体,近年来发生数量呈逐年增加趋势,给水稻生产造成严重损失。杀虫剂室内毒力测定和抗性选育工作的顺利进行,必须长期饲养大量的标准试虫。文章介绍采用稻苗饲养室内大量繁殖灰飞虱的方法,饲养盒的使用使该方法更加方便,而越冬用麦苗饲养更接近田间的实际情况。     

具有很高观赏价值的金蟒和黄金蟒

瑞士日内瓦电视台关注我国人工繁殖金蟒和黄金蟒。2010年4月该电视台记者专程从瑞士来到广州专题采访驯蛇用毒奇人——雷重新博士。     

用人工饲料饲养赤眼蜂中间寄主蓖麻蚕

1978—81年筛选出材料易得,成本低的3个蓖麻蚕人工饲料配方。不同蓖麻蚕品种对同一配方有不同的适应性,广乙、广四、684等6个品种适于人工饲料饲养。干饲料用麻袋包装后套上尼龙袋密封常温下可保存9个月。改进了人工饲料的配制和给食方法,简化了设备和降低了养蚕成本,并研制出一套人工饲料大量饲养蓖麻蚕的工具。两年多来共饲养25批15万头蓖麻蚕,成活率均达70.00—97.70%。茧层率,羽化率和平均每雌产卵量不低于鲜叶饲养组。 用人工饲料饲养的蚕卵繁殖赤眼蜂质量良好,田间释放防治甘蔗螟,卵寄生率达65.65—94.18%,枯心苗率仅达 1.47—1.72%,被害节率 2.11—3.28%,和鲜叶养的蚕卵放蜂区接近,效果明显。     

山西蟒河自然保护区栓皮栎林的聚类和排序

本文用等级聚类、极点排序、主成分分析和对应分析等多元分析法, 对蟒河自然保护区的栓皮标(Quercus variabilis)林进与于了聚类和排序。等级聚类法将蟒河自然保护区的栓皮栎林划分为五个群丛, 极点排序、主成分分析和对应分析三种方法得出一致的结论, 并较好地反映了环境变化的梯度及植被变化的连续性。综合分析表明栓皮栎林是保护区内稳定的群落类型。     

说蟒

蟒是蛇类中最原始的一科蛇,有着悠久的历史,从发现的化石可以追溯到古新世时代,距今约74万年以前。这在它们的肛门处见到的痕迹后肢,也证实了它们从原始蜥蜴类演化而来的痕迹,在蟒科中,包括森蚺和水蟒都具两根角质小刺,它虽然已不能用于行走,但都能自如地活动,其作用主要用在求偶之际,去搔弄,刺激雌性。蟒的发源地     

茶尺蠖人工饲料的研究

本报道饲养茶尺蠖(Ectropis obliqua hypulina Wehrli)的5种人工饲料及其饲养方法．5种人工饲料均可用于大规模饲养一代幼虫．其中62号配方可用于续代饲养,在实验室内饲养5代的结果表明。效果良好．在饲料成分的加工．配制及饲养方法等方面．较前人有相当大的改进,因而叶因子用量减少,幼虫历期缩短．用人工饲料饲养的幼虫历期为13-20天。基本接近以茶叶饲养的对照(11—18天)．实验结果还表明饲料含水量．饲养方法．饲养密度和添加饲料的次数不同,对茶尺蠖的生长发育有明显的影响．初龄幼虫用平面培养基倒置饲养和高龄幼虫用片状饲料正置饲养为最佳方法．     

Curcuminoids as inhibitors of thioredoxin reductase: A receptor based pharmacophore study with distance mapping of the active site

Curcumin is the yellow pigment of turmeric that interacts irreversibly forming an adduct with thioredoxin reductase (TrxR), an enzyme responsible for redox control of cell and defence against oxidative stress. Docking at both the active sites of TrxR was performed to compare the potency of three naturally occurring curcuminoids, namely curcumin, demethoxy curcumin and bis-demethoxy curcumin. Results show that active sites of TrxR occur at the junction of E and F chains. Volume and area of both cavities is predicted. It has been concluded by distance mapping of the most active conformations that Se atom of catalytic residue SeCYS498, is at a distance of 3.56 from C13 of demethoxy curcumin at the E chain active site, whereas C13 carbon atom forms adduct with Se atom of SeCys 498. We report that at least one methoxy group in curcuminoids is necessary for interation with catalytic residues of thioredoxin. Pharmacophore of both active sites of the TrxR receptor for curcumin and demethoxy curcumin molecules has been drawn and proposed for design and synthesis of most probable potent antiproliferative synthetic drugs.     

A Unique Protease Cleavage Site Predicted in the Spike Protein of the Novel Pneumonia Coronavirus (2019-nCoV) Potentially Related to Viral Transmissibility

正Dear Editor,In December 2019, a novel human coronavirus caused an epidemic of severe pneumonia(Coronavirus Disease 2019,COVID-19) in Wuhan, Hubei, China(Wu et al. 2020; Zhu et al. 2020). So far, this virus has spread to all areas of China and even to other countries. The epidemic has caused 67,102 confirmed infections with 1526 fatal cases     

Comparative morphology of the carpel in the Liliaceae: Hewardieae, Petrosavieae, and Tricyrteae

The young pistils in the melanthioid tribes, Hewardieae, Petrosavieae and Tricyrteae, are uniformly tricarpellate and syncarpous. They lack raphide idioblasts. All are multiovulate, with bitegmic ovules. The Petrosavieae are marked by the presence of septal glands and incomplete syncarpy. Tepals and stamens adhere to the ovary in the Hewardieae and the Petrosavieae but not in the Tricyrteae. Two vascular bundles occur in the stamens of the Hewartlieae and Tricyrtis latifolia. Ventral bundles in the upper part of the ovary of the Hewardieae are continuous with compound septal bundles and placental bundles in the lower part. Putative ventral bundles occur in the alternate position in the Tricyrteae and putative placental bundles in the opposite. position in the Petrosavieae. The dichtomously branched stigma in each carpel of the Tricyrteae is supplied by a bifurcated dorsal bundle.     

鸡传染性法氏囊病病毒研究进展

传染性法氏囊病(Infection bursal disease, IBD)是由鸡传染性法氏囊病毒(Infectious bursal disease virus, IBDV)引起的鸡和火鸡的一种高度接触性传染病,给世界各国的禽养殖业带来了巨大损失.自IBDV发现至今新的变异株不断出现,分子结构的改变导致病毒致病力的改变及宿主对疫苗应答的改变,使得传统的疫苗已不能控制其流行,因此各国学者对其基因组结构和功能进行了广泛深入的研究,并积极研制新型有效的疫苗以达到防治的目的.     

Development of a Novel Reverse Transcription Loop-Mediated Isothermal Amplification Method for Rapid Detection of SARS-CoV-2

In conclusion, the novel visual RT-LAMP assay is a simple, rapid, and sensitive approach for detection of SARS-CoV-2, and it is ready for application in primary care and community hospitals or health care centers, and even patients' own houses in response to the current SARS-CoV-2 epidemic because the assay does not require sophisticated equipment and skilled personnel. Furthermore, it is also ready to be used in fields for screening samples from wild animals and environments to facilitate the identification of potential intermediate hosts that mediate the cross-species transmission of SARS-CoV-2 from bats to humans.     

Perinatal Vertical Transmission of Chikungunya Virus in Ruili,a Town on the Border between China and Myanmar

正Dear Editor,Chikungunya virus (CHIKV), an arbovirus in the family of Togaviridae, genus Alphavirus, is transmitted by the A.aegyptii or A. albopictus mosquito, and causes disease in humans characterized by fever, rash, and arthralgia (Silva and Dermody 2017; Suhrbier 2019). It was first reported in 1953 in Tanzania, and caused only a few outbreaks and sporadic cases in Africa and Asia in last century. However, in the epidemic in 2004, CHIKV acquired mutations that conferred enhanced transmission by the A. albopictus mosquito(Schuffenecker et al. 2006). Since then, it has successively caused outbreaks in Africa, the Indian Ocean, South East Asia, the South America, and Europe (Zeller et al. 2016).     

Enterovirus 71 3C proteolytically processes the histone H3 N-terminal tail during infection

Highlights
1. The N-terminal tail of histone H3 is specifically cleaved during EV71 infection.
2. Viral protease 3C is identified as a protease responsible for proteolytically processing the N-terminal H3 tail.
3. Our finding reveals a new epigenetic regulatory mechanism for Enterovirus 71 in virus-host interactions.