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报道了青藏高原通泉草科(Mazaceae)肉果草属(Lancea)粗毛肉果草(Lancea hirsuta Bonati)新分布。该种分布于西藏八宿县(30°12′3.8″N,97°16′48″E)、西藏林周县(30°4′58.8″N,91°16′48″E)、西藏当雄县(30°32′24″N,91°20′24″E)和青海杂多县(33°4′48″N,95°9′36″E),该次发现将中国该种自然分布区扩大到西藏、青海等地,海拔分布也增加至4 300m。凭证标本现存于中国科学院青藏高原生物标本馆(HNWP)。 相似文献
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正2016年4月,在西藏雅鲁藏布江中游干流下段的派镇段(29°31′9″N,94°52′12″E,海拔2 897 m),6月在米林段(29°12′1″N,94°5′16″E,海拔2 947 m),2017年7月在里龙段(29°8′32″N,93°54′34″E,海拔2 960 m),使用定置刺网共捕获到15尾疑似黄斑褶(Pseudecheneis sulcatus)的鱼类标本(图1a,b)。2017年4月在雅鲁藏布江下游墨脱段(29°18′10″N,95°16′52″E,海拔682 m)采集到一批黄斑褶标本(图1c,d),并与中游的黄斑褶进行了形态学比较鉴定。 相似文献
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2022年8月,于湖南省郴州市永兴县湘阴渡镇(113°01′18′′E,26°11′87′′N,海拔174 m)采集到两头蛇活体标本1号,通过形态测量比较,发现所采集标本与中国广东省分布的岭南两头蛇(Calamariaarcana)形态特征基本一致;后基于线粒体Cytb基因片段进行分子系统发育分析,结果显示该标本与岭南两头蛇形成高支持率单系群(后验概率PP为1.00,自举值BS为100),所采集标本与岭南两头蛇的遗传距离为1%。综合形态学和分子生物学证据,最终确定该标本为两头蛇科(Calamariidae)两头蛇属的岭南两头蛇,系湖南省蛇类分布新记录种。 相似文献
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于2006年10月及2015年8月在中国云南省采集到台湾灰麝鼩(Crocidura tanakae Kuroda,1938)3号成体标本。1号雄性与1号雌性的标本来自屏边县大围山自然保护区(22°53′59″N,103°41′23″E,2 088 m),另1号雌性标本采自富宁县里达镇半边箐(23°28′11"N,105°35′59″E,1 442 m)。其尾毛长而稀疏,尾长变异大,后足宽大,后足足底和掌外侧垫突出、聚集且呈圆形,这些特征与模式产地的标本吻合。其线粒体Cyt b与地模标本的遗传距离为1.6%。采集地生境为原生林与次生林交界处和落叶季雨林。 相似文献
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2014年在黑龙江省横道河子地区(44°48′44″N,129°02′04″E,海拔约740 m)采集到1只鼩鼱(标本编号为CH5)。2015年在内蒙古自治区达赉湖地区(48°37′20″N,117°53′17″E,海拔约720 m)采集2只鼩鼱(标本编号为DE7和DE12)。这些新获标本经鉴定为姬鼩鼱(Sorex minutissimus)。《小鼩鼱(食虫目:鼩鼱科)辽宁省新纪录》文中的标本(080910,090920)经重新鉴定也为姬鼩鼱。利用mt DNA的Cyt b基因全序列构建系统进化树,结果揭示,小鼩鼱聚为一支,姬鼩鼱聚为另一支,新获标本(CH5、DE7、DE12)和待厘定标本(080910、090920)都聚在姬鼩鼱一支,进一步支持形态学鉴定结果。2015年采集的姬鼩鼱为内蒙古自治区新纪录,而《小鼩鼱(食虫目:鼩鼱科)辽宁省新纪录》文中的小鼩鼱(Sorex minutus)(标本号:080910,090920)更正为辽宁省姬鼩鼱新纪录。 相似文献
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<正>2013年8月6日~11日,作者在辽宁省凌源市进行野外调查,于大河北乡南刘杖子村田地边缘的山麓(40°48'02.3″N,118°54'11.4″E~40°48'09.5″N,118°54'11.6″E,海拔约693 m)采集到蜥蜴标本3号,另于居民住宅附近低矮丘陵顶部(40°48'02.5″N,118°54'02.9″E,海拔811 m)采集到蜥蜴标本1号。经鉴定为蜥蜴科Lacertidae麻蜥属Eremias山地麻蜥E.brenchleyi,为辽宁省蜥蜴新纪录。标本保存于沈阳师范大学两栖爬行动物研究所标本室,编号为SYNU13090016~SYNU13090019。 相似文献
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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 相似文献
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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. 相似文献
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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. 相似文献
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Meng Miao Gang Deng Xiaobei Xiong Yang Qiu Wenda Huang Meng Yuan Fei Yu Shimei Bai Xi Zhou Xiaolu Zhao 《中国病毒学》2022,37(2):314-317
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. 相似文献
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. 相似文献
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Dong Liu Xin Wang Yisong Wang Peigang Wang Dongying Fan Sichang Chen Yuguang Guan Tianfu Li Jing An Guoming Luan 《中国病毒学》2018,33(5):402-409
Rasmussen’s encephalitis (RE) is a rare pediatric neurological disorder, and the exact etiology is not clear. Viral infection may be involved in the pathogenesis of RE, but conflicting results have reported. In this study, we evaluated the expression of both Epstein-Barr virus (EBV) and human herpes virus (HHV) 6 antigens in brain sections from 30 patients with RE and 16 control individuals by immunohistochemistry. In the RE group, EBV and HHV6 antigens were detected in 56.7% (17/30) and 50% (15/30) of individuals, respectively. In contrast, no detectable EBV and HHV6 antigen expression was found in brain tissues of the control group. The co-expression of EBV and HHV6 was detected in 20.0% (6/30) of individuals. In particular, a 4-year-old boy had a typical clinical course, including a medical history of viral encephalitis, intractable epilepsy, and hemispheric atrophy. The co-expression of EBV and HHV6 was detected in neurons and astrocytes in the brain tissue, accompanied by a high frequency of CD8+ T cells. Our results suggest that EBV and HHV6 infection and the activation of CD8+ T cells are involved in the pathogenesis of RE. 相似文献