Results 41 to 50 of about 11,059 (156)
Luminescent Properties of Sr_(3-x)Si_(1-x)Al_xO_5:xCe--(3+) Phosphors Prepared by Heterogeneous Precipitation Method [PDF]
, 2012 采用非均相沉淀法制备了Sr3-XSI1-XAlXO5∶XCE3+荧光粉,并与高温固相法制备的该荧光粉进行了对比。以Xrd、SEM和荧光光谱分析来表征所制备的荧光粉。结果表明,非均相沉淀法比高温固相反应法制备的荧光粉相纯度更高,颗粒分布更窄,晶面清晰,团聚程度小,相对发光强度也更高。荧光粉的激发光谱为270~500 nM的双峰宽带,最强激发峰位于417 nM处。发射光谱为450~700 nM的单峰宽带,峰值位于525nM处。电荷补偿剂对荧光粉相对发光强度影响较大,外加Al3+置换SI4 ...
彭杰, 曾人杰, 李郎楷
core
Interdisciplinary Medicine, Volume 4, Issue 1, January 2026.Macrophages stimulated by BCG significantly enhanced endothelial cell proliferation, migration, and tube formation. Mechanistically, this pro‐angiogenic activity was reliant on activating NF‐αB or other signaling pathways, which induced the upregulation of HIF‐1α and VEGFA.
Yuyang Hou +10 more
wiley +1 more source
野生动物学报, 1997 从１９９２年冬季至１９９３年冬季对东北三省熊类资源的调查表明：（１）东北三省共有野生黑熊３６６３头，其中辽宁省３００头（占总量的８．１９％），吉林省７６４头（２０．８６％），黑龙江省２５９９头（７０．９５％）。野生棕熊共１１８８头，其中吉林省５２头（４．３８％），黑龙江省１１３６头（９５．６２％）。（２）东北三省共有熊类养殖场２０６处。饲养黑熊１６２５头，其中辽宁省２６４头（１６．２５％），吉林省１０６６头（６５．６％），黑龙江省２９５头（１８．１５％）。饲养棕熊２６０头，辽宁省７０头（２６．９２ ...
邹红菲, 马建章
doaj
Regulation &Governance, Volume 20, Issue 1, Page 35-63, January 2026.ABSTRACT Existing literature largely agrees that authoritarian regimes establish channels for political participation to gather valuable information on citizens' anti‐regime sentiments and policy preferences and to supervise lower‐level bureaucrats and firms.
Anton Bogs
wiley +1 more source
野生动物学报, 1988 楼燕,又称北京雨燕,属于雨燕目雨燕科,它在吉林省极为罕见。文献只记载六十年代初在吉林省白城地区有过分布,其它资料省内没有记载。我们于1986年7月24日在吉林省林业厅门前,偶尔发现一种正在迅速飞翔的鸟,发出高尖清脆而拖长的 zhi—zhi—zhi—zhi……叫声,随后进行了观察 ...
蒋劲松
doaj
Design and Analysis of an Origami Robot With Tensegrity Characteristics
Applied Bionics and Biomechanics, Volume 2026, Issue 1, 2026.In recent years, small ground robots have demonstrated significant potential in the exploration of complex environments and in rescue operations. However, the rigid structure of conventional robots affects the adaptability and popularity of robots. The research team was inspired by features such as the miniaturization and transport costs of origami ...
Peng Ni +4 more
wiley +1 more source
野生动物学报, 1994 吉林省珲春敬信地区春季鸭科鸟类群落结构的研究杨兴家，吴志刚（吉林省林业生物防治中心站）（吉林省林业科学研究院）珲春敬信地区位于图们江下游近入海地带，距离日本海的最近处仅１０来公里，是我国靠近日本海的最近区域。这里最低海拔高度５米，属图们江水系的河湖泡...
杨兴家, 吴志刚
doaj
[Cross-sectional study on the sleep status and risk factors for sleep problems in infants and young children in Jilin Province]. [PDF]
Zhongguo Dang Dai Er Ke Za Zhi, 2023 Zeng FJ, Zhao ZR, Li XX, Li P.
europepmc +1 more source
全国“爱鸟周”暨授予吉林市“爱鸟护鸟文明城市”仪式在吉林市举行
野生动物学报, 2006 由中国野生动物保护协会、吉林省林业厅、吉林省野生动物保护协会、吉林市政府,于2006年5月14日在北国江城吉林市联合举办全国“爱鸟周”暨授予吉林市“爱鸟护鸟文明城市 ...
doaj