Results 21 to 30 of about 212,295 (161)
, 2003 间充质干细胞具有多向分化功能,在体外培养时仍可保持其增殖和分化的能力,可以作为组织工程的一种较为理想的细胞来源。细胞与胞外环境之间以及细胞与细胞之间的相互作用对细胞增殖和分化具有重要影响。对干细胞的研究大多集中于生化因素的影响,而且一般是在静态的常规细胞培养容器中进行。在本研究中,尝试在骨髓间充质干细胞的培养过程中,施加不同的力学环境 ...
龙勉, 陶祖莱, 后晓南, 孙树津
core +2 more sources
Haiyang yu huzhao伪雄鱼是由雌鱼性逆转而成的生理性雄鱼，在全雌鱼苗种的规模化繁育过程中有着至关重要的作用，但国内外对其精子活力的研究较少。为研究黄姑鱼伪雄鱼繁殖期精子活力及环境因子对其活力的影响，利用计算机辅助精子活力分析系统(CASA)对伪雄鱼的精子密度、运动率、寿命和运动速度等指标进行测定；并且设置不同的温度和pH梯度组，探究不同环境因子对伪雄鱼精子活力的影响。结果显示，伪雄鱼精子密度为(2.60~2.24)×1010个/mL；在繁殖期内，伪雄鱼精子密度呈逐渐下降的趋势，且在排精中期和晚期 ...
王 玙璠 +6 more
doaj +1 more source
投喂频率对横带髭鲷
Haiyang yu huzhao为探究投喂频率对横带髭鲷幼鱼生长性能、营养成分、消化酶活性及消化系统形态结构的影响，选用初始体重为(7.13±0.93) g的活力较好幼鱼，随机分为4组，每组3个重复，每个重复20尾鱼。4个实验组的投喂频率分别是1次/d (F1)、2次/d (F2)、3次/d (F3)、4次/d (F4)，试验持续8周。结果表明，随着投喂频率增加，终末体重、增重率、特定生长率、摄食率均有所上升，但F3和F4组没有显著差异，F4组较F1组终末体重增加了8.29 g、增重率提高了63%、摄食率提高了20 ...
平 洪领 +5 more
doaj +1 more source
Integrative Conservation, EarlyView.This study presents a comprehensive review of the 500‐year spatiotemporal evolution of global botanical gardens, identifying three major development stages—initial exploration (1543–1699), steady expansion (1700–1899), and rapid proliferation (1900–2020)—with six distinct sub‐stages. We propose a tripartite driving framework grounded in colonial botany
Shidong Li, Guangzhen Shi, Qingwei Li
wiley +1 more source
Intact coastal nursery rearing amid climate‐driven phenological shifts in threatened salmon
Conservation Biology, EarlyView.Abstract Literature linking phenology to climate has proliferated in recent decades and shows that climate change has reorganized seasonal opportunities worldwide. However, this literature often quantifies changes in point measures of timing (e.g., beginnings and peaks) without context about duration (e.g., rearing season length) or performance (e.g ...
Stuart H. Munsch +8 more
wiley +1 more source
Genomics‐informed management of ex situ populations
Conservation Biology, EarlyView.Abstract The European Association of Zoos and Aquariums (EAZA) manages insurance populations for hundreds of species through its EAZA ex situ programs (EEPs). EEPs help safeguard against extinction in the wild and provide source populations for genetic rescue programs.
Cock van Oosterhout +8 more
wiley +1 more source
Rare Metals, Volume 45, Issue 10, October 2026.ABSTRACT The use of Ti6Al4V alloy in dental implantation is constrained by its high elastic modulus and biological inertness, which lead to delayed osseointegration and a high failure risk. Additionally, its chemical incompatibility with hydroxyapatite (HA) impedes the development of stable bioactive composites.
Shangyong Zuo +8 more
wiley +1 more source
Habitat and spatial trends of U.K. wintering waterbird populations over 50 years
Conservation Biology, Volume 40, Issue 5, October 2026.Abstract The United Kingdom is an important wintering ground for millions of waterbirds. Most U.K. wintering waterbird populations increased between 1970 and the mid‐1990s, but declined thereafter. We examined U.K. population indices in 46 wintering waterbird species in two 25‐year periods, 1970–1994 and 1995–2019, to identify which waterbird groups ...
Blaise Martay +8 more
wiley +1 more source
Neutral interactions among non‐native plants are common
New Phytologist, Volume 252, Issue 1, Page 292-309, October 2026.Global distribution of studies and overall effect of co‐invasion for all metrics of non‐native plant performance combined. Summary Globalization has accelerated the establishment of non‐native plant species, increasing the prevalence of multispecies co‐invasions; yet interactions among co‐invaders remain poorly understood.
Feng He +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 9, September 2026.ABSTRACT Pyritum can eliminate blood stasis and promote the healing of muscles and bones, which has been used as a traditional mineral medicine in China for thousands of years. However, the mechanisms of action and processing methods of Pyritum were not illustrated.
Mingxia Li +8 more
wiley +1 more source