Results 41 to 50 of about 2,351,627 (156)

铜绿假单胞菌整合子Ⅰ和ISCR1分布及ERIC-PCR分型

open access: yesZhongguo shiyan zhenduanxue, 2012
目的研究临床分离铜绿假单胞菌的整合子Ⅰ和ISCR1的分布情况,并对其进行基因分型。方法分离临床234株铜绿假单胞菌,用WHONET5.4分析菌株药敏情况,PCR检测整合酶Ⅰ、整合子Ⅰ、ISCR1以及ISCR1携带的耐药基因。ERIC-PCR进行基因分型。结果铜绿假单胞菌对阿莫西林/克拉维酸、氨苄西林、氯霉素、头孢唑啉、米诺环素、氨苄西林/舒巴坦高度耐药,对环丙沙星、头孢他啶、头孢哌酮/舒巴坦、阿米卡星、亚胺培南、美洛培南较敏感,118株整合酶Ⅰ阳性,95株Ⅰ类整合子可变区阳性 ...
孙静静, 吴奎海, 芮勇宇
doaj  

Prospective external validation of ADNEX and RMI for estimating risk of malignancy in adnexal masses in general gynecological settings: Danish multicenter study

open access: yesUltrasound in Obstetrics &Gynecology, Volume 68, Issue 2, Page 256-269, August 2026.
ABSTRACT Objectives The primary aims of this study were to validate externally the diagnostic performance of the Assessment of Different NEoplasias in the adneXa (ADNEX) model for distinguishing between malignant and benign adnexal masses, when used by non‐expert ultrasound examiners in general gynecological settings with a low prevalence of ovarian ...
I. M. Dueholm Hjorth   +11 more
wiley   +1 more source

Inferring alternative ecosystem states with field survey data

open access: yesMethods in Ecology and Evolution, Volume 17, Issue 8, Page 2256-2276, August 2026.
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   +10 more
wiley   +1 more source

疏叶骆驼刺母株与子株间的水分整合

open access: yes, 2013
摘 要 在未灌溉的土地上, 疏叶骆驼刺(Alhagi sparsifolia)通常不能进行有性繁殖, 隆繁殖是其种群维持和延续的唯一方式。因此, 克隆性及其相关克隆性状(如水分整合)在疏叶骆驼刺自然种群的维持过程中可能扮演了极其重要的角色。该文通过疏叶骆驼刺母株和子株之间的间隔子切断和给母株补充水分的方法, 研究了母株和子株在各处理下的水势、叶形态和植株生长变化情况。结果表明: (1)间隔子切断后, 疏叶骆驼刺母株和子株正午水势均明显增大(p 0.05)。(3 ...
曾凡江   +5 more
core  

通辽地区大肠埃希菌耐药性与Ⅰ类整合子关系研究

open access: yesZhongguo shiyan zhenduanxue, 2017
目的了解通辽地区大肠埃希菌临床分离株中I类整合子分布情况及基因盒类型,初步探讨耐药与整合子之间的关系。方法收集2013年10月-2014年3月通辽市某医院的非重复菌株作为试验菌株,采用Kirby-Bauer纸片法进行药敏试验;采用PCR方法扩增Ⅰ类整合酶基因,在此基础上扩增Ⅰ类整合子可变区,对部分基因盒阳性菌株测序并分析。结果 99株大肠埃希菌临床分离株对所试23种抗生素中的13种耐药率高于50%,主要为对青霉素、磺胺类药物、头孢菌素等;Ⅰ类整合酶检出55株,检出率为55.56%;基因盒携带有36株 ...
于新   +4 more
doaj  

Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities

open access: yesConservation Biology, Volume 40, Issue 4, August 2026.
Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner   +10 more
wiley   +1 more source

等离子体催化耦合重整生物质燃气研究

open access: yes, 2007
采用分步浸渍法制备了Ni-Mg整体式催化剂,加入萘作为焦油模型化合物考察了低温等离子体耦合催化重整生物质粗燃气的性能,研究了放电条件及反应温度对催化重整制备合成气的调变作用。结果表明:高压高频放电产生等离子体耦合催化重整,对重整净化生物质粗燃气有明显效果。在重整温度为750℃,放电频率为22kHz时CH4的转化率可由催化重整时的86%提高到94%左右,放电条件下可以将合成气的H2/CO比由1.06提高至1.15。温度对耦合重整影响较为显著,CH4、CO2的转化率均随温度的升高而升高,最高可分别达到94 ...
王铁军   +5 more
core  

免疫组化 CSA 法在检测子宫内膜石蜡切片 整合素 αν β3 中的应用

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2002
【目的】探讨免疫组织化学技术检测子宫内膜整合素αν β3 抗原的方法,为研究整合素α ν β3 在胚胎黏附、着床过程中的作用机制提 供方便。【方法】采用免疫组化 LSAB法和 CSA 法检测妊娠组和非妊娠组子宫内膜整合素α ν β3 抗原。【结果】用 CSA 法检测接受胚胎移植治 疗的不孕症患者子宫内膜石蜡切片中的整合素α ν β3 抗原,获得了阳性的结果,妊娠组整合素αν β3 表达明显高于非妊娠组。【结论】CSA 检测法 比 LSAB 法敏感性更高,特别适用于检测组织细胞表达低的抗原 ...
梁英杰, 李 洁, 赖英荣
doaj  

电力多终端量子密钥融合设计及验证

open access: yesGuangtongxin yanjiu, 2021
随着国网信息化建设,国家级、集团式网络安全威胁层出不穷,形成适合电网的量子级安全可靠通信技术解决方案尤为重要。文章从多终端量子密钥应用角度出发,提出了一种基于量子保密通信技术的手持抄表解决方案,实现技术升级换代。首先,从技术理论和应用领域,介绍分析了量子保密通信技术的现状及其与经典设施相结合的可行性;然后,以量子密钥管理系统为核心,设计实现了量子密钥安全存储和业务安全流程应用模型;最后,在搭建量子密钥分发整体环境的基础上,实现多终端量子密钥应用验证架构设计,验证了量子密钥业务应用流程 ...
夏少娴, 翟峰, 夏信, 王守志
doaj  

Out‐of‐Class Exposure Through Audiovisual Materials, Enjoyment, and Language Proficiency: A Mixed‐Methods Longitudinal Study of Junior Secondary FL Learners

open access: yesInternational Journal of Applied Linguistics, Volume 36, Issue 3, Page 2029-2037, August 2026.
ABSTRACT The current study set out to contribute to the burgeoning research area of out‐of‐class L2/FL learning by examining, specifically, English learners’ extramural engagement with watching movies/videos and/or listening to songs (i.e., exposure to audiovisuals).
Art Tsang, Susanna Siu‐sze Yeung
wiley   +1 more source

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