1.Objective: To evaluate the biomechanical efficacy of calcium phosphate cement(CPC) in augmentation and restoration of fusion equipment of pedicle of vertebrae(FEPV).
目的:评价磷酸钙骨水泥(calcium phosphate cement,CPC)强化和修复椎弓根融合器的生物力学效果。
2.Methods 8 majority canis familiaris were studied. 3 lumbar intervertebral discs(L2-3,L3-4,and L4-5)in every dog were classified into 3 groupscontrol group,polymethylmethacrylate(PMMA)group and calcium phosphate cement(CPC)group. Radiographic was performed immediately after the dogs were anesthetized.
方法选用8只成年家犬,以每只犬L2-3、L3-4、L4-5椎间盘为实验对象,随机分为对照组、聚甲基丙烯酸甲酯(polymethylmethacrylate,PMMA)与磷酸钙骨水泥(calcium phosphate cement,CPC)3组。
3.IMPROVING OIL WELL CEMENTING QUALITY WITH MAGNETIZED CEMENT SLURRY IN DAQING OIL FIELD
IMPROVING OIL WELL CEMENTING QUALITY WITH MAGNETIZED CEMENT SLURRY IN DAQING OIL FIELD
4.Objective:To study the influence of anti-tumor drug incorporation on the physicochemical properties of calcium phosphate cement(CPC).
目的:研究复合抗肿瘤药物后对磷酸钙骨水泥(calcium phosphate cement,CPC)理化性质的影响。
5.[Methods] Fifty extracted human teeth were randomly divided into five groups ,A B C D E, each group with 10 teeth. The teeth of group A B C D E were respectively filled with gutta-percha point plus Zinc Oxide-eugenol(ZOE) paste ZOE paste VTTAPEX gutta-percha point plus VITAPEX gutta-percha point plus Compound Thymol Cement paste .
[方法]50颗成人离体牙,随机分为A、B、c、D、E五组,每组10颗,按常规法进行根管预备至40号,A组填充氧化锌丁香油糊剂+牙胶尖、B组填充氧化锌丁香油糊剂、C组填充VITAPEX、D组填充VITAPEX+牙胶尖、E组填充根管充填剂(Compound Thymol Cement)+牙胶尖。
6.The varieties of products are as follows:asbestos and cement wave tile, steel net asbestos and cement small wave tile, fine steel net asbestos and cement big wave tile,asbestos and cement flat plate for construction,reinforced asbestos and cement plate,electric are plate for electric equipment,electric furnace plate and so on.
产品品种有：石棉水泥小波瓦，钢丝网石棉水泥小波瓦，钢丝网石棉水泥中波瓦，石棉水泥防火建筑平板，石棉水泥压力板，电器电弧板，电炉板等。
7.As a kind of cement retarder, normal setting time and good effect for mechanical properties and soundness of cement can be got when adding desulfurization gypsum in cement, so it can used instead of natural gypsum to produce cement entirely, coal gangue is activated and coal ash desulfurized have good active, can improve cement output and also can depress consumption when them be used as mixed material, have well economic and environmental effects.
脱硫石膏作水泥缓凝剂时，水泥的安定性、凝结时间正常，可改善水泥的力学性能，完全可替代天然石膏；活化后的煤矸石和脱硫煤灰具有较好的活性，用作水泥混合材可增加水泥产量、降低生产成本，具有良好的经济和环境效益。
8.On the basis of these factors ,the cement hat cementing tool is developed. Meanwhile,the paper works out the cement hat cementing method which can prevent cement slurry settlement,improve cement slurry displacement efficiency and increase the cement bond strength. Through field application of the method in 502 wells,good effect is obtained
针对大庆油田表层地层疏松 ,流沙层厚 (厚达 1 0 0多米 ) ,上部井眼大 ,井径不规则 ,加之钻井液密度与水泥浆密度差大 ,引起水泥浆下沉等因素 ,研制出了水泥帽固井工具 ,通过对现状的分析 ,制定出防止水泥浆下沉 ,提高水泥浆顶替效率 ,增加水泥胶结强度的水泥帽固井方案 ,经过 5 0 2口井的现场应用 ,取得了较好的效果
9.Study on the compatibility of the Three Kinds of Cements :high belite cement,portland cement and ordinary cement with the four different kinds of superplascizer indicates that high belite cement possesses excellent compatibility with superplascizer, the cause of which is also analyzed:that there is less C?3A and more C?2S contained in high belite cement. ?
研究了高贝利特水泥、普通硅酸盐水泥、基准水泥等3种水泥与4种不同的高效减水剂之间的适应性。 研究结果表明,高贝利特水泥与高效减水剂具有优异的适应性,而高贝利特水泥中较少的C3A含量以及相对较高的C2S含量,是其与高效减水剂具有优异适应性的主要原因。
10.The research reveals that remarkable difference in the physical property and performance of c ement and concrete between the mixed cement and the shaft /rotary kiln cement. When the mix ratio of the shaft kiln cement and r otary kiln cement is 1:3,the strength and durability of the mixed cement and the resultant concrete are better than the weighte d average of the two single cements.
经研究发现,这些混合水泥及其所配成的混凝土物理性能和混凝土的耐久性,与单纯立窑和回转窑煅烧工艺制成的水泥相比有明显的区别,当立窑和回转窑水泥的混合比为1∶3时,混合水泥及其混凝土的强度和耐久性指标均优于单一窑型的加权平均值。
