Results 11 to 20 of about 510,708 (165)

干扰素治疗后病毒性肝炎病人#br# 干扰素中和抗体的检测及意义

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1997
摘 要 使用4 种α-干扰素的98 例病毒性肝炎病人, 在治疗前、治疗期间及治疗后定期检测抗干扰素中和抗 体, 结果发现阳性率为34.7%, 该抗体的产生与病人的性别、年龄、治疗前ALT 水平、肝炎病毒感染类型、以及肝炎的 临床类型均无显著相关;低剂量干扰素较易产生中和抗体;使用不同干扰素制剂产生中和抗体存在差异, 其中以 rIFN-α2a 最高, IFN-αN1 最低;但中和抗体的出现对干扰素的抗病毒疗效影响不大, 由于病例数较少,干扰素治疗期间 ...
徐启桓 彭文伟 陆玮伦
doaj   +1 more source

景区人为干扰对野生岩羊行为节律的影响

open access: yes野生动物学报
为探究景区旅游活动对野生动物的干扰效应,本研究以贺兰山国家级自然保护区内野生岩羊(Pseudois nayaur)为研究对象,通过量化苏峪口(强干扰区)与岩画(弱干扰区)两处景区的游客密度、道路与设施邻近度评估人为干扰强度,并结合长期行为观测,分析了不同干扰强度下岩羊行为节律的季节性响应。结果表明:在强干扰区,夏季岩羊的取食行为与游客数量呈显著负相关(P < 0.05或P < 0.01),警戒行为(成年雌性除外)与游客数量呈极显著正相关(P < 0.01 ...
祝招玲   +5 more
doaj   +2 more sources

无线直放站的干扰自适应消除技术

open access: yesGuangtongxin yanjiu, 2009
空间同频干扰在无线直放站工程现场普遍存在,传统的射频滤波器技术无法在频域上解决此问题,因而容易引起直放站自激。文章运用了一种数字化干扰自适应消除技术,其效果相当于将直放站的空间隔离度提高了30 dB以上,从而可以有效解决以上问题。
刘浩, 沈竹, 刘永飘
doaj   +2 more sources

应用EP7-2A文件评价脂浊对淀粉酶的干扰及其定量化

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2008
【目的】 探讨脂浊对淀粉酶检验结果的影响,并对脂浊干扰进行评价及定量化。【方法】 根据美国临床实验室标准化委员会(CLSI)制定的评价方案EP7-2A文件,应用SYSMEX公司提供的标准干扰试剂盒中的乳糜干扰物,测定标准浊度与脂浊指数(Lipemia Index)之间的关系以及脂浊对淀粉酶检测项目的影响大小。【结果】 脂浊指数与标准浊度成线性相关,回归方程为Y(脂浊指数)=32.722X(标准浊度)+0.439,R2=0.9983;根据EP7-P的"配对-差异"方法,判断脂浊对淀粉酶存在干扰;根据EP7-
doaj   +1 more source

NGSO星座Q/V波段星间链路干扰规避技术

open access: yes, 2023
随着大规模星座系统的发展,近地轨道空间频轨资源越来越紧缺。随之而来的星载通信链路干扰风险不容忽视,已成为今后星座系统设计需要重点考量的指标之一。在规避干扰的前提下,保证星座系统的工作性能至关重要。针对大规模非静止轨道(NGSO)星座系统星间链路存在的干扰风险问题,提出了基于干扰、受扰链路夹角的干扰规避方法。以Starlink的Q/V波段星间链路为例,定义了系统效率与工作效率,研究不同干扰规避方法与建链策略下系统的鲁棒性。仿真结果表明,基于受扰链路夹角的干扰规避方法能够在不同建链策略下将系统干扰噪声比I /
姚 秀娟   +4 more
core   +1 more source

Effects of restoration practices on biodiversity in temperate and boreal forests

open access: yesConservation Biology, EarlyView.
Abstract Several restoration practices are used to mitigate and compensate for the negative effects of large‐scale forestry on biodiversity in temperate and boreal forests. A comprehensive synthesis of the benefits of these practices across taxa is missing. We conducted a systematic review and meta‐analysis on this topic.
Malin Tälle   +2 more
wiley   +1 more source

Root economic space is associated with rhizosphere microbial divergence via root metabolite‐mediated pathways in degraded grasslands

open access: yesFunctional Ecology, Volume 40, Issue 7, Page 2068-2082, July 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Grasslands worldwide are experiencing severe degradation due to overgrazing, climate change and anthropogenic disturbances, resulting in substantial declines in biodiversity and ecosystem functioning.
Xiaoqi Wang   +5 more
wiley   +1 more source

Anthropogenic nitrogen addition interrupts seasonal connectivity and structures of plant–pollinator networks

open access: yesFunctional Ecology, Volume 40, Issue 6, Page 1878-1891, June 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao   +8 more
wiley   +1 more source

A link between increased temperature and avian body condition in a logged tropical forest

open access: yesConservation Biology, Volume 40, Issue 3, June 2026.
Abstract The combined effects of anthropogenic disturbances, such as logging and climate change, remain poorly understood; yet, they are the main threats to tropical biodiversity. Most tropical African countries lack long‐term climate data, so climate impacts on biodiversity cannot be assessed.
Moreen Uwimbabazi   +7 more
wiley   +1 more source

Plasmon‐Enhanced NaYF4:Yb/Er/Tm UCNPs Fluorescent Biosensing for Ultrasensitive Detection of GP73 in Clinical Liver Cancer Diagnosis

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Early diagnosis of liver cancer demands high sensitivity, high specificity, convenience and real‐time monitoring capabilities. However, it encounters challenges such as low concentration of markers, numerous interfering factors, and limitations of detection technologies.
Changsheng Shi   +10 more
wiley   +1 more source

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