Preparation and properties of chrome-plated diamond/copper composites [PDF]
To prepare the diamond/copper composite materials with good thermal and physical properties, the surface of diamond particles was modified by chromium plating, and the composites were prepared by vacuum hot pressed sintering (VHP). The microstructure and
HAN Huanqing +4 more
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, 2004 20 0 1年 12月 ,在广东省韶关市凡口铅锌矿湿地处理系统中采集土壤样品 ,采用Singh和Stout的培养法对土样中的原生动物进行定性、定量研究。共发现原生动物 4 2种 ,对照区和湿地每克风干土壤中原生动物的平均丰度分别为 2 377和 113,三大类土壤原生动物丰度中鞭毛虫占优势 ,多于纤毛虫和肉足虫。通过原生动物种类、丰度与土壤理化参数的统计分析说明铅锌尾矿对土壤原生动物群落的危害极大。通过土壤原生动物丰度和物种相似性聚类分析结果反映出正在使用的湿地 3土壤受污染严重 ,已停止使用的湿地 ...
冯伟松,杨军,叶志鸿,缪炜,余育和,黄铭洪,沈韫芬
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Preparation and properties of PEK-c and PVDF nanomaterials composite ultrafiltration membranes [PDF]
, 2017 近年来，纳米材料在膜技术领域引起了广泛的关注和应用。所制备的分离膜具有比表面积大、孔隙率高、通量大和选择透过性好等优点，在污水处理、生物化工等行业具有良好的应用前景。本文提出一种制备高分子纳米材料及其复合膜的方法，利用冷冻-萃取技术制备高分子纳米材料分散液，进而在微孔基膜上制备复合超滤膜。以酚酞型聚芳醚酮（PEK-c）和聚偏氟乙烯（PVDF）为例研究高分子纳米材料的形成原理及制备条件；对所得纳米材料和相应的复合膜进行结构和构型的表征；继而研究其分离性能。主要研究内容和结果如下： （1）PEK ...
吕瑞雪
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[[alternative]]Describe the Grain Fabric Effect on the Shear Strength of Granular Materials Using Fractal Dimensions (III) [PDF]
計畫編號：NSC94-2211-E032-001研究期間：200508~200607研究經費：552,000[[sponsorship ...
楊長義
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[Effect of porous surface structure on fatigue strength of 3D printed zirconia]. [PDF]
Beijing Da Xue Xue Bao Yi Xue BanZhao J +6 more
europepmc +1 more source
[Short-term effecetiveness of endoscopic lumbar discectomy combined with annular suturing in treatment of lumbar disc herniation]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhang S, Yao F, Liao Z, Wang T, Shen M.
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 ZhiMen Y, Wei L, Hu B, Hao P, Zhang C.
europepmc +1 more source
[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 ZhiKong Y +8 more
europepmc +1 more source
[Effectiveness comparison of transforaminal endoscopy and unilateral biportal endoscopy for far lateral lumbar disc herniation]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiZhang J +6 more
europepmc +1 more source