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1.
广利油田储集层毛管压力特征 总被引:1,自引:0,他引:1
本论文运用毛管压力曲线的形态分析方法结合物性参数,对广利油田的储层进行了很好的评价,得出了大量的统计数据,广利油田存在三类储层,分析了各种储层的特征,对该地区的进一步勘探和油气田的开发提供了一定的依据,具有一定的参考价值。 相似文献
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K. W. Allen 《The Journal of Adhesion》2013,89(3-4):261-277
The once distinct and independent theories of adhesion have been losing their isolation and converging. Ideas of the effects of surface roughness, once dismissed as irrelevant except in the case of textiles, have been revised; albeit on a smaller scale as details of surfaces have been revealed by sophisticated techniques. Electrostatic interactions across an interface have been more deeply explored and their significance recognised and expounded. Diffusion of groupings and chain segments within a polymer have been related to the possibilities of interaction with a variety of surfaces. Perhaps most important, theories of adsorption have been extended in depth. The precise nature of the molecular interactions have been recognised and quantified. In doing this the contribution of diffusion and elastoplastic phenomena have been integrated. These developments are collated and analysed to present the present understanding of the concepts. 相似文献
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A Review of Contemporary Views of Theories of Adhesion 总被引:2,自引:0,他引:2
K. W. Allen 《The Journal of Adhesion》1987,21(3):261-277
The once distinct and independent theories of adhesion have been losing their isolation and converging. Ideas of the effects of surface roughness, once dismissed as irrelevant except in the case of textiles, have been revised; albeit on a smaller scale as details of surfaces have been revealed by sophisticated techniques. Electrostatic interactions across an interface have been more deeply explored and their significance recognised and expounded. Diffusion of groupings and chain segments within a polymer have been related to the possibilities of interaction with a variety of surfaces. Perhaps most important, theories of adsorption have been extended in depth. The precise nature of the molecular interactions have been recognised and quantified. In doing this the contribution of diffusion and elastoplastic phenomena have been integrated. These developments are collated and analysed to present the present understanding of the concepts. 相似文献
4.
Vortex rings have been formed in water by impulsive flow through an orifice, and mixing effects due to the lings have been measured. Laboratory tests on the mixing of stratified layers of salt solution by vortex rings formed at a 6.35 cm diameter orifice have indicated that Froude number is an important factor in determining the energy efficiency of mixing. Field tests using a 25.4 cm orifice in Hamilton Harbour (18 m depth of water) have shown a small mixing effect. Further experiments with a 25.4 cm orifice in a test tank have shown that the vortex rings have a range of at least 30 m. 相似文献
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Dr. Wanyama Peter Juma Dr. Dubekile Nyoni Prof. Dean Brady Prof. Moira L. Bode 《Chembiochem : a European journal of chemical biology》2022,23(7):e202100527
The Morita-Baylis-Hillman (MBH) reaction affords highly functionalised allylic alcohols containing a new stereogenic centre. These MBH adducts are very versatile and have been transformed into a large range of products, some of which have medicinal potential. Several examples of asymmetric syntheses of MBH adducts have been reported, although a generally applicable method remains to be developed. Biocatalytic approaches for the synthesis and enzymatic kinetic resolution of MBH adducts have been reported, and are discussed in detail in this review. Enzymes able to catalyse the asymmetric MBH reaction have been identified, but selectivity and efficiency have generally been low. Lipases, esterases and nitrile-converting enzymes have all been successfully applied in the resolution of MBH adducts, with excellent selectivity being realised in most cases. 相似文献
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本文简要回顾了陶瓷墙地砖深加工的工艺理论和机械设备。对陶瓷墙地砖深加工的自动抛光生产线和组成生产线的工艺单机作了一般介绍。指出设计陶瓷墙地砖深加工工艺单机时要注意的主要问题,并提供了解决这些问题的方法。 相似文献
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驱油剂在双河油砂上的静态吸附研究 总被引:6,自引:0,他引:6
采用静态吸附法研究了驱油剂OCS(石油磺酸盐)和HPAM(部分水解聚丙烯酰胺)在河南油田双河油砂上的吸附特性,求出了在使用浓度下的表观静态吸附量和饱和吸附量,并用Langm u ir和F reund lich公式对其吸附趋势进行了预测,发现OCS和HPAM都具有典型的单分子层的吸附规律。 相似文献
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简述了电炉短流程工艺的特点,介绍了超高功率电炉、LF精炼炉及连铸中间包各部位用耐火材料的选择与应用。实践表明,超高功率电炉一精炼炉一连铸用耐火材料已完全国产化,国产耐火材料取得了良好的使用效果。 相似文献
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Polycyclic Aromatic Hydrocarbons (PAHs) are a group of Volatile Organic Compounds (VOCs), which have serious health problems
associated with their emission into the atmosphere. Catalytic oxidation is an effective abatement process to control PAH emissions,
and the types of catalysts investigated have been reviewed. The majority of studies have used naphthalene as a model PAH,
and in particular, catalysts containing palladium and platinum have demonstrated high activity for total oxidation. Catalysts
based on the precious metals include those supported on high surface area supports, which have also been modified by adding
further components, and metal exchanged zeolites. Metal oxide catalysts have also been employed and the most active for total
oxidation are ceria-based. Studies of PAH total oxidation have largely been reported only in the last 10 years, and there
still remains wide scope to develop improved catalysts and understand their catalytic mechanisms. 相似文献
14.
The great differences between the catalytic activities of the Group VIII and the Group IB metals have attracted much attention, especially over the last 25 years, and explanations of these differences have been sought through studying the manner of activity variation in alloys formed between suitable pairs of metals. Selection of suitable alloy systems has presented difficulties. Most work has naturally been done on systems exhibiting a continuous range of solid solution, and hence Pt-Au and Pt-Ag alloys, both of which have miscibility gaps, have not been widely studied. Much work has been done on Ni-Cu alloys, but recent results have demonstrated the presence of phase separation in this system, and this has called into question the interpretation of the earlier work. The Pd-Ag and Pd-Au systems appear to have complete miscibility, and have consequently been much studied: it is to them that this review is directed. 相似文献
15.
The great differences between the catalytic activities of the Group VIII and the Group IB metals have attracted much attention, especially over the last 25 years, and explanations of these differences have been sought through studying the manner of activity variation in alloys formed between suitable pairs of metals. Selection of suitable alloy systems has presented difficulties. Most work has naturally been done on systems exhibiting a continuous range of solid solution, and hence Pt-Au and Pt-Ag alloys, both of which have miscibility gaps, have not been widely studied. Much work has been done on Ni-Cu alloys, but recent results have demonstrated the presence of phase separation in this system, and this has called into question the interpretation of the earlier work. The Pd-Ag and Pd-Au systems appear to have complete miscibility, and have consequently been much studied: it is to them that this review is directed. 相似文献
16.
具有杀菌活性的吡唑类衍生物的研究进展 总被引:10,自引:2,他引:8
吡唑类衍生物是一类具有良好杀菌活性的化合物。概述了近10年报道的有关芳(杂)环基吡唑、吡唑酰胺、磺酰基吡唑、甲氧丙烯酸酯类等类型的吡唑类衍生物的杀菌活性以及它们结构特点。也介绍了最新的吡唑类杀菌剂品种。研究表明,吡唑类化合物具有广泛生物活性,作为杀菌剂研究开发很有发展前景。 相似文献
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建立了管弹式微反应试验装置和延迟焦化连续试验装置,进行了重质液化油延迟焦化的基础研究和工艺试验。成功地解决了重质液化油在预热器里结焦的问题,获得了最佳工艺条件和比较理想的焦化产品。 相似文献
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Bachan S. Rawat Indar B. Gulati 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》1976,26(1):425-435
Liquid-liquid equilibrium studies have been carried out on 11 solvents using two binary hydrocarbon mixtures for selective extraction of aromatics. The solvents used have been compared on the basis of selectivity, solvent capacity and tie line correlation curves. Tie line data have been determined for 18 systems. The selectivity and solvent power of solvents as obtained from limiting activity coefficient and tie line data have been compared. The selectivity and capacity of solvents have been related to their structure through an empirical parameter. 相似文献
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G. L. Gaines 《Polymer Engineering and Science》1972,12(1):1-11
The surface tension of a polymer liquid is a property of considerable practical importance. Within the past decade the experimental difficulties in accurately measuring the surface tension of viscous polymer melts have been overcome, and a considerable body of data is now available. This review discusses the measurement techniques which have proved useful, the results which have been obtained, and theoretical approaches which have been applied to them. A tabulation of surface and interfacial tension values which have been published up to mid-1971 is included. 相似文献