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广州地区丙型肝炎患者病毒基因分型 及其与临床病情的关系 [PDF]

Zhongshan Daxue xuebao. Yixue kexue ban, 1999
目的: 探讨广州地区丙型肝炎病毒(HCV)基因型分布的特点以及 HCV 基因型与临床病情的关系。方法: 病例 选自广州居民,基因分型使用 Okamoto 的“型特异性引物PCR 法” ,并加以改进,基因型的命名采用国际上统一的 Simmonds两 级命名体系。结果: 广州 HCV 基因型分布 1a 占 7. 6%、1b 占 49. 5%、2a 占 23. 8%、2b占 1. 9%、3a 占 2. 9%、1b+2a 混合型占 9.
安　阳　杨绍基　姚集鲁
doaj   +1 more source

HBV-DNA高水平孕妇的HBV 前S和S区基因突变及基因分型

Zhongshan Daxue xuebao. Yixue kexue ban, 2012
【目的】 研究HBV-DNA高水平孕妇的HBV前S(前S1和前S2)及S区的基因突变模式和基因分型,为从病毒因素探讨HBV母婴传播免疫阻断失败提供实验基础【方法】 选取血清HBsAg阳性且HBV-DNA≥105 IU/ mL的孕妇41 例,提取血清HBV-DNA,靶向设计HBV各基因型的前S及S区通用引物, 经PCR 扩增测序进行序列分析, 检测和分析前S及S区基因的突变情况,并进行基因分型【结果】 ①在 41 例样本中, 共有29例( 70.73%)样本存在前S1前S2及S区基因突变 ...
doaj   +1 more source

Changes of Potential Suitable Areas for Lynx Under Climate Change in Mohe Area, Daxing'anling Mountains, China 气候变化下中国大兴安岭漠河地区猞猁潜在适宜区的变化

Wildlife Letters, EarlyView.
Climate change drives shifts in suitable habitats for Eurasian lynx and its prey (hare, roe deer) in Mohe, Daxing'anling Mountains. Under RCP scenarios, moderate warming (RCP4.5) promotes substantial habitat expansion, while high‐emission conditions (RCP8.5) lead to strong expansion in the 2050s but slower gains and partial contraction by the 2070s ...
Binglian Liu, Dan Ju, Hong Chen, Qi Qi, Geng Liu, Shaochun Zhou   +5 more
wiley   +1 more source

Organ‐specific ozone and nitrogen legacies strengthen substrate control over litter decomposition

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Elevated tropospheric ozone (O3) and nitrogen (N) deposition are concurrent atmospheric changes that strongly influence terrestrial carbon cycling, yet their combined effects on below‐ground decomposition remain poorly understood.
Xiaofan Hou, Pin Li, Yuqian Sun, Chenhan Ma, Yushu Tian, Qiannan Lin, Yun Li, Lijuan Yin, Dongmei Zhang   +8 more
wiley   +1 more source

Alleviation of phosphorus rather than nitrogen limitation driven by permafrost and landscape effects on Dahurian larch forests

Functional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Permafrost thaw is reshaping nutrient dynamics in boreal forests, but its impacts on tree nutrient limitation and functional strategies remain poorly understood. Clarifying these responses is crucial for predicting the response of boreal forests to climate change.
Qiyue Fu, Liang Shi, Zhaopeng Song, Boyi Liang, Honglin He, Kun Yang, Weihua Zhang, Lisha Lyu, Anatoly S. Prokushkin, Hongyan Liu   +9 more
wiley   +1 more source

Inferring alternative ecosystem states with field survey data

Methods in Ecology and Evolution, EarlyView.
Abstract Many ecosystems potentially exhibit alternative stable states, where distinct states can coexist under identical environmental conditions. While simulation models have generated key hypotheses in alternative stable states theory, they often rely on scale‐free parameters disconnected from real ecosystems.
Ning Chen, Xiaoxue Dong, Xinwei Li, Lei Huang, Heng Huang, Changjia Li, Yanchuang Zhao, Chi Xu, Miaojun Ma, Zak Ratajczak, Changming Zhao   +10 more
wiley   +1 more source

Drivers of bat researchers’ intent to adopt field hygiene practices

Conservation Biology, EarlyView.
Abstract Infectious disease is a growing threat to wildlife, with zoonotic transmission most likely at the human–wildlife interface. One underappreciated activity at this interface is fieldwork with wild animals, but associated risks can be mitigated through field hygiene (FH) practices, such as using personal protective equipment and other appropriate
Joanna L. Coleman, Ewan A. Macdonald, Abigail L. Rutrough, Tanja M. Straka, Todd D. Little, Zachary Stickley, Tigga Kingston   +6 more
wiley   +1 more source

Providing regular and frequent maps of losses and gains of farmland birds based on European monitoring data

Conservation Biology, EarlyView.
Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando, Guillem Pocull, Sara Fraixedas, Anna Gamero, David Martí, Oriol Solà, Dani Villero, Verena Keller, Petr Voříšek, Alena Klvaňová, Gabriel Gargallo, Vitalie Ajder, Marc Anton, Ainars Aunins, Dawn Balmer, Mattia Brambilla, Tomasz Chodkiewicz, Przemysław Chylarecki, Cristi Domșa, Vlatka Dumbović Mazal, Virginia Escandell, Néstor Fernández, Ruud Foppen, Juan Gallego‐Zamorano, Carlos Godinho, Irene Guerrero, Christina Ieronymidou, Frédéric Jiguet, Aleksi Lehikoinen, Primož Kmecl, Peter Knaus, Lechosław Kuczyński, Åke Lindström, Qenan Maxhuni, Blas Molina, Jean‐Yves Paquet, Maria Luisa Paracchini, Danae Portolou, Draženko Z. Rajković, Dimitrije Radišić, Jiří Reif, Paul Shimmings, Henk Sierdsema, Jovica Sjeničić, Karel Šťastný, Bård G. Stokke, Nicolas Strebel, Zoltán D. Szabó, Tibor Szép, Norbert Teufelbauer, Nicolas Titeux, Sven Trautmann, Judit Veres‐Szászkac, Thomas Vikstrøm, Lluís Brotons   +54 more
wiley   +1 more source

嗜热四膜虫SP011基因缺陷型细胞株的基因表达变化分析

, 2016
有性生殖的关键过程是通过减数分裂产生生殖细胞,而减数分裂的一个重要环节是进行基于DNA双链断裂的同源染色体重组。在同源染色体重组过程中,SPO11蛋白催化产生DNA双链断裂,从而起始同源染色体的重组。因此,研究SPO11基因缺失在减数分裂过程中所引起的基因表达变化有助于在转录组水平上了解该基因的作用。本研究通过对嗜热四膜虫(Tetrahymena thermophila)野生型和SP011敲除细胞株在接合生殖时期2 h、3 h、4 h、5 h四个时间点的转录组进行高通量测序 ...
闫冠雄, 二袁冬霞, 熊杰, 田苗, 张晶, 缪炜   +5 more
core   +1 more source

Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework

Conservation Biology, EarlyView.
Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift, Amanda M. Barker, William B. Driggers III, Bryan S. Frazier, Douglas H. Adams, James J. Gelsleichter, Dana M. Bethea, Bethany M. Deacy, David S. Portnoy   +8 more
wiley   +1 more source