Results 171 to 180 of about 26,437 (250)

用PCR技术同时检测微量血痕的种属来源及其DNA多态性

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 1992
应用聚合酶链反应技术扩增血痕DNA,根据扩增产物中有无aPoB基因的数量可变重复序列(VNTR)及其扩增片段的大小即可同时确定其种属特异性和DNA的多态性。实验结果显示人血痕可见扩增带并具有多态性,而猴猪狗猫鸡血痕无扩增带。
doaj  

Video Assistant Referee(ndums): A Populist Weapon or Effective Tool to Stop Autocrats in Competitive Authoritarian Regimes in Latin America?

open access: yesLatin American Policy, Volume 16, Issue 4, December 2025.
ABSTRACT In recent years, video assistant referee systems have been increasingly used to correct unfair decisions in sports. Similarly, I argue that constitutional referendums play a corrective role in hybrid or competitive authoritarian regimes, where the electoral referee is biased and the government enjoys unfair advantages.
Muhammet Derviş Mete
wiley   +1 more source

新疆克里雅河下游圆沙古城古代居民线粒体DNA多态性研究 [PDF]

open access: bronze, 2008
高诗珠   +6 more
openalex   +1 more source

To Ban or Not to Ban: The UK's Hamlet Moment With Farm Antibiotics

open access: yesPolitics &Policy, Volume 53, Issue 6, December 2025.
ABSTRACT This article applies the Multiple Streams Framework (MSF) to examine post‐Brexit antimicrobial resistance (AMR) governance in UK agriculture, focusing on the contested regulation of prophylactic antibiotic use in farm animals. The study reveals how Brexit created a structural policy window, yet political and ideological dynamics rendered it ...
George Asiamah
wiley   +1 more source

江西南矶保护区越冬期湿地水鸟群落多样性及种多度关系

open access: yes野生动物学报, 2017
为了深入掌握越冬期湿地水鸟群落多样性及种-多度关系,2016年1月采用定点直接计数法对南矶保护区越冬期湿地水鸟群落进行了监测分析。结果显示:(1)南矶保护区共记录有越冬的湿地水鸟6目12科24种; 物种组成以雁形目和鹤形目鸟种最多(54.16%),其次为鸻形目和鹳形目(33.34%); 区系分布以古北种为主(70.83%),其次是广布种(20.83%); 居留型以冬候鸟占绝对优势(75.00%),其次为留鸟(25.00%); 生态类群以涉禽(54.17%)和游禽(41.67%)占绝对优势 ...
吴庆明 张 琦 姚茂林 黄 显 陈 川 胡斌华 黄晓凤
doaj  

Overcoming Title 42 and the 2022‐3 Venezuelan Migrant Expulsion Spectacle: A Border Securocracy Case Study

open access: yesPolitics &Policy, Volume 53, Issue 6, December 2025.
ABSTRACT On October 12, 2022, the Biden administration abruptly changed course and announced that Venezuelan refugees would be immediately subject to Title 42—the policy that effectively means that those migrants would be summarily forced to return, or expelled, to Mexico.
Terence Michael Garrett   +1 more
wiley   +1 more source

中国云南25个少数民族Y染色体DYS287位点的地理多态性 [PDF]

open access: bronze, 2002
石宏   +6 more
openalex   +1 more source

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