Jianzhu Gangjiegou Jinzhan火灾下轴心受压约束钢构件的力学响应复杂，所产生的温度内力导致其耐火极限的确定与计算难度大。为简化结构构件在高温承载极限状态时约束钢构件的防火设计，采用有限元数值模拟方法开展了大量参数分析，以确定火灾高温下轴心受压约束钢构件的承载与失效规律。基于经试验验证的可靠有限元模型，研究了不同长细比、轴向约束刚度比和初始荷载比等参数对轴心受压约束钢构件火灾响应的影响。结果表明，上述参数均将显著影响约束钢构件的火灾响应，且当长细比较大、轴向约束刚度比较小、初始荷载比较大时 ...
朱劭骏 +6 more
doaj
[Design and practice of instrumental analysis experiment： determination of borneol and camphor in <i>Chrysanthemum</i> by multiple headspace extraction-gas chromatography- mass spectrometry]. [PDF]
Se PuLi HX +5 more
europepmc +1 more source
野生动物学报为研究观赏禽类中分离的奇异变形杆菌（Proteus mirabilis）对第三代头孢菌素的耐药机制，于2019年从河南省某动物园禽类养殖区绿孔雀（Pavo muticus）、红绿金刚鹦鹉（Ara chloroptera）、火鸡（Meleagris gallopavo）、帽子鸡（polish chicken）和非洲鸵鸟（Struthio camelus）5种观赏禽类中分离17株奇异变形杆菌，经药物敏感性试验、blaCTX-M基因检测、全基因组测序、PFGE和RT ...
梁玉蕾 +5 more
doaj
[Ethyl caffeate alleviates dextran sulfate sodium-induced colitis in mice by restoring intestinal epithelial tight junctions <i>via</i> activating the Wnt/β-Catenin pathway]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoZhang K +7 more
europepmc +1 more source
, 2016 新疆某铜矿矿石属于凝灰岩型氧化铜矿石,选矿厂采用硫化浮选工艺,存在回收率低、捕收剂耗量高、泡沫量大且发黏等问题。本文主要针对新疆滴水铜矿火山凝灰岩型氧化铜矿样进行了选矿试验研究,试验结果表明:采用混合捕收剂,经过一次粗选,三次扫选和三次精选的浮选流程,可获得铜精矿品位为18.94%,回收率为85.05%的浮选指标。
王文海, 叶树峰
core
[CRISPR-Cas9 activation screening identifies candidate chemokine regulators of ter-tiary lymphoid structure formation in bladder cancer]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanWang Y, Song H, DU Y, Xu T.
europepmc +1 more source
[Role and Mechanism of Hyaluronic Acid-modified Milk Exosomes in Reversing Pemetrexed Resistance in Lung Adenocarcinoma Cells]. [PDF]
Zhongguo Fei Ai Za ZhiWu L, Lei J, Li H.
europepmc +1 more source
[Erianin inhibits proliferation and migration of breast cancer cells <i>in vitro</i> by inhibiting Wnt/β-catenin signaling]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoFan D +5 more
europepmc +1 more source
Dianci bileiqi氧化锌压敏电阻在重复过电压下性能会逐渐劣化，最终可能导致短路、起火或爆炸，目前单次耐受测试无法全面反映ZnO压敏电阻在实际使用中的预期性能，亟需对其冲击老化特性及失效机理进行深入研究。文中建立了ZnO压敏电阻重复冲击电流试验实验平台，研究了以压敏电压、冲击残压及泄漏电流为表征的ZnO压敏电阻保护特性劣化特性。研究结果表明，压敏电阻的冲击老化寿命随着冲击密度的增加而显著减少，这是由于电阻片尺寸效应引起的微观缺陷增加所致。此外，不同电流幅值条件下的冲击间隔对老化过程也有显著影响 ...
李宣健楠 +4 more
doaj
[Isolation and identification of <i>Pediococcus acidilactici</i> BPA03 derived from human milk and evaluation of its antioxidant and anti-aging probiotic properties]. [PDF]
Nan Fang Yi Ke Da Xue Xue BaoCao L, Huang P, Zhang Z, Sun W, Qiu F.
europepmc +1 more source