Results 91 to 100 of about 2,463 (148)

砒砂岩区主要造林树种枯落物及林下土壤持水特性

Shuitu Baochi Xuebao, 2017
为了探究砒砂岩区不同造林树种水文特征，以该地区油松、侧柏、青杨、山杏、沙棘、柠条为研究对象，通过浸泡法和环刀法，对比分析了不同树种枯落物层和土壤层的持水特性。结果表明：砒砂岩区主要造林树种枯落物蓄积量变动范围为1.55~7.89 t/hm2，青杨林下枯落物最大持水率最高为281.26%，其他树种枯落物最大持水率依次为油松（217.14%）、侧柏（201.05%）、山杏（202.79%）、沙棘（170.96%）、柠条（158.08%）撂荒地（143.88%）。油松林下土壤层容重最小为1.46 g/cm3 ...
杨振奇, 秦富仓, 李晓琴, 刘力川, 牛晓乐   +4 more
doaj  

大兴安岭北部越冬飞鼠(Pteromys volans)树洞巢材保温机理研究

野生动物学报, 2017
森林生态系统中的树洞对于某些野生动物的生存至关重要。由于树洞具有抵御不良气候的作用,许多树栖性动物利用树洞来提高栖息适应能力而扩大自己的分布范围。树洞对于低温下不冬眠的小型哺乳动物飞鼠(Pteromys volans)而言更是关键资源。然而,目前对于越冬飞鼠洞巢保温作用的机理了解甚少。为此,本文利用热物理学原理和实验,研究了大兴安岭北部越冬飞鼠所利用巢材的保温机理。通过对树洞巢材孔隙率的测定,得到巢材孔隙率为(51.69±0.79)%。这一结果表明巢材是一种高孔隙率的多孔介质 ...
满效强 陈 亮 程卫红 王松庆 马建章
doaj  

[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]

Beijing Da Xue Xue Bao Yi Xue Ban
Zhao J, Ding Q, Li W, Ma Q, Lan Y, Zhang L, Han J.   +6 more
europepmc   +1 more source

[Simulation research on the influence of regular porous lattice scaffolds on bone growth]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Men Y, Wei L, Hu B, Hao P, Zhang C.
europepmc   +1 more source

上扬子区古生界页岩的微观孔隙结构特征及其勘探启示 [PDF]

, 2015
夏嘉, 宋之光, 曹涛涛, 王思波
core  

[Influence of porosity and Young's modulus of gelatin methacrylate anhydride hydrogels on the biological behavior of mouse bone marrow mesenchymal stem cells]. [PDF]

Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Kong Y, Tian F, Liu QH, Zhang C, Song W, Kong Y, Li Z, Jirigala E, Huang S.   +8 more
europepmc   +1 more source

[Early follow-up study on three-dimensional-printed customized porous acetabular components for reconstructing extensive acetabular bone defects in primary total hip arthroplasty]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Tang S, Li Z, Hu X, Tan L, Wang H, Wang Y, Lu M, Tang F, Luo Y, Zhou Y, Tu C, Min L.   +11 more
europepmc   +1 more source

[Applications of ordered porous materials in chromatography separation and analysis]. [PDF]

Se Pu
Wang ZX, Wang DD, Wang ST, Song YY.
europepmc   +1 more source

[Application and research progress of metal-organic framework materials in skin repair]. [PDF]

Sheng Wu Yi Xue Gong Cheng Xue Za Zhi
Ma S, Wu W, Liu H, Liu M, Xing F.
europepmc   +1 more source

[Observation on analgesic efficacy of ultrasound-guided high fascia iliac compartment block for tourniquet-related pain following total knee arthroplasty]. [PDF]

Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi
Yu Q, Tang Y, Fu H, Jiang L, Song B, Wang W, Xie Q, Chen S.   +7 more
europepmc   +1 more source