Results 31 to 40 of about 4,981 (163)

中国西北地区汉族苯丙酮尿症患者苯丙氨酸羟化酶基因突变分析

open access: yesZhongguo shiyan zhenduanxue, 2022
目的 分析中国西北地区汉族苯丙酮尿症(PKU)患者苯丙氨酸羟化酶(PAH)基因的突变特征。方法 应用PCR产物直接测序法对2003年1月-2019年8月在中国西北五省区新生儿疾病筛查中心或医学遗传中心确诊的223例汉族PKU患儿及其父母的PAH基因启动子、第1-13外显子及其旁侧内含子区域进行基因突变分析。结果在西北地区223例汉族PKU患者446条PAH等位基因中检测出75种致病突变,总检出率为88.6%(395/446),突变以错义突变(66.7%)、剪切位点突变(16.0%)和无义突变(9.3 ...
何江   +6 more
doaj  

我国模糊网纹溞(甲壳纲:双甲目)的补充描述 [PDF]

open access: yes, 1995
我国模糊网纹溞(甲壳纲:双甲目)的补充描述陈受忠,张世萍,宋希强中国科学院水生生物研究所武汉430072华中在业大学水产系日本Ueno氏在记述中国台湾的枝角类一文 ̄[2]的名录表中列入了模糊网纹(Cerio-daphniadubiaRichard,1..
陈受忠,张世萍,宋希强
core  

Innovation Policy in an Emerging Economy: How Regional and Technological Disparities Moderate the Effects of a National Law

open access: yesReview of Policy Research, Volume 43, Issue 1, January 2026.
ABSTRACT The Innovation Law, enacted in Brazil in 2004, laid the regulatory and institutional foundations for the national innovation system, aiming to promote closer interaction between universities, research institutions, and industry. However, nearly two decades after its implementation, its influence on the national innovation system remains ...
Breno Valente Fontes Araújo   +3 more
wiley   +1 more source

“三北”防护林地区野生动物资源考察概况

open access: yes野生动物学报, 1982
“三北”防护林地区系指东北、华北和西北11个省(区),即包括新疆、宁夏的全部,甘肃、内蒙古的绝大部分,青海的大部分,陕西的秦岭以北,山西的西部和北部及东北三省的西部,共455个市县(旗)。总面积约374万平方公里,占全国陆地面积的1/3左右,但森林只有8,100万亩,森林复被率很低仅为2.1%。“三北”防护林地区地处祖国边疆,少数民族集居,风沙、干旱、水土流失、冰雹和霜冻“五灾”俱全,木料、燃料、饲料和肥料“四料”奇缺,农牧业生产低而不稳,人民生活甚为贫困。为了彻底改变这一地区的落后面貌 ...
林骥
doaj  

中国西北和西南地区古民氐羌族的关系 [PDF]

open access: yes, 1998
departmental bulletin ...
6473   +2 more
core   +1 more source

Citizens Turning Into Scientists: A Calling to Boost the Knowledge of the Public to Address the Environmental Crisis in the Brazilian Semiarid 从公众到科学家:助力提升公众知识以应对巴西半干旱地区环境危机

open access: yesIntegrative Conservation, Volume 4, Issue 4, Page 546-554, December 2025.
Desertification is increasing in the Brazilian Semiarid, leading to loss of species and ecosystem services, while precise data on biodiversity distribution and trends are lacking. Public engagement in scientific projects can improve ecosystem protection.
Lucas Rodriguez Forti   +3 more
wiley   +1 more source

中南地区电瓷技术经验交流会在佛山召开

open access: yesDianci bileiqi, 1975
为推动中南地区电瓷行业生产的发展,醴陵电瓷厂、石湾电瓷厂于1974年11月10日至11月15日在广东佛山召开了中南地区电瓷技术经验交流会。参加会议的有中南地区五个省(自治区)的电瓷生产厂、院校,东北、华北、西北、西南、华东区的电瓷行业组长厂 ...
本刊通讯员
doaj  

Comparative analysis of the circulation and structure characteristics with different types of plum rains in the North of Zhejiang Province(浙北地区不同梅雨年型环流结构差异对比分析)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2014
通过客观分析资料和梅汛期降水量实况,对2005~2013年浙北地区梅汛期降水进行分型,对比分析不同年型大尺度环流及结构特征差异.结果表明:100 hPa上多雨年南亚高压要强于少雨年,当南亚高压主体偏西时,浙北地区降水偏多.500 hPa上多雨年较少雨年588脊线位置明显偏南,少雨年588线的西伸脊点伸展到菲律宾一带,多雨年588线西伸脊点则明显偏东.850 hPa切变线及低空西南急流位置偏南,导致西南急流携带的水汽集聚在浙北地区上空,急流左侧上升运动强,为强降水创造了有利条件 ...
LIWenmi(李文蜜)   +2 more
doaj   +1 more source

郝景盛在西北考查团的植物采集及后来的研究 [PDF]

open access: yes, 2007
郝景盛在西北考查团中的植物考察和采集,是中国学者在新中国成立之前在青海地区有限的几次之一.当时西方人在青藏高原的考察已经很多.郝景盛后来在德国完成的博士论文《青海植物地理》,以他自己的这次考察为基础,充分利用了西方已有的研究成果,对青海东北部作了植物地理学研究 ...
徐凤先
core  

Return of the Swamp Rabbit: Sylvilagus aquaticus Occupancy Increased and Expanded Along the Northern Extent of Its Distribution Range 沼泽兔的回归:沼泽兔 (Sylvilagus aquaticus) 在其分布范围北缘的分布率上升并向外扩张

open access: yesWildlife Letters, Volume 3, Issue 4, Page 161-172, December 2025.
Swamp rabbit (Sulvilagus aquaticus) in southeast Missouri is increasing and expanding, with occupancy probabilities of 0.66 in 2010–2012 and 0.79 in 2021–2022. ABSTRACT Swamp rabbits (Sylvilagus aquaticus) are a bottomland hardwood specialist that have experienced range contraction at the northern and western extents of their range.
Thanchira Suriyamongkol   +6 more
wiley   +1 more source

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