Metal analysis

Xem 1-20 trên 125 kết quả Metal analysis
  • With many 'flexible' structures such as large span bridges, tall buildings, towers, cable roofs, etc., being built, the need to understand the dynamics behavior of structures has become a necessity for many engineers. The recent problems with the millinium bridge is simply another reminder. The many devastating earthquakes in many parts of the world leading to severe loss of life in densely inhabited urban areas alos has underlined the need for a fundamental understanding of structural behavior.

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  • The book contains an introduction to matrix analysis, and to the basic algorithms of numer- ical linear algebra. Further results can be found in many text books. The book of Horn and Johnson [HJ85] is an excellent reference for theoretical results about matrix analysis; see also [Bha97]. The subject of linear algebra, and matrix analysis in particular, is treated in an original and illuminating fashion in [Lax97].

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  • The story of metal casting is as glamorous as it is ancient, beginning with the dawn of human civilization and interwoven with legends of fantastic weapons and exquisite artworks made of precious metals. It was and is involved in the two main activities of humans since they began walking the earth: producing and defending wealth. Civilization as we know it would not have been possible without metal casting. Metal casting must have emerged from the darkness of antiquity first as magic, later to evolve as an art, then as a technology, and finally as a complex, interdisciplinary science....

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  • Introduction: Hydrogen cyanide (HCN) is volatile (boiling point: 25.7°C) and weakly acidic (pKa: 9.2). It is bound with cytochrome oxidase to inhibit its activity and induce cellular anoxia; it shows an immediate toxic effects. The fatal dose of HCN is about 100 mg. Cyanide has been being involved in various incidents of suicides, homicides and accidents. It is relatively easy to obtain cyanide, because it is being widely used in metallurgy, metal-plating and other chemical industries. It is a typical poison to be analyzed with high priority.

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  • Metal foams are a new, as yet imperfectly characterized, class of materials with low densities and novel physical, mechanical, thermal, electrical and acoustic properties. They offer potential for lightweight structures, for energy absorption, and for thermal management; and some of them, at least, are cheap. The current understanding of their production, properties and uses in assembled in this Design Guide.

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  • Different aspects of metal forming, consisting of process, tools and design, are presented in this book. The chapters of this book include the state of art and analysis of the processes considering the materials characteristics. The processes of hydroforming, forging and forming of sandwich sheet are discussed. Also, a chapter on topography of tools, and another chapter on machine tools are presented. Design of a programmable metal forming press and methods for predicting forming limits of sheet metal are described....

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  • The long-term effects of treatment with sirolimus-eluting stents, as compared with bare-metal stents, have not been established. Methods We performed an analysis of individual data on 4958 patients enrolled in 14 randomized trials comparing sirolimus-eluting stents with bare-metal stents (mean followup interval, 12.1 to 58.9 months). The primary end point was death from any cause. Other outcomes were stent thrombosis, the composite end point of death or myocardial infarction, and the composite of death, myocardial infarction, or reintervention....

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  • The nano-scale spatial organization of metallic and other inorganic materi-als into 1D objects is a key task in nanotechnology. Nano-scale fibers and tubes are very useful templates for such organization because of their inherent 1D organization. Fibrillar biological molecules and biomolecular assemblies are excellent physical supports on which to organize the inor-ganic material.

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  • (BQ) Part 2 book "Mechanics of sheet metal forming" has contents: Simplified analysis of circular shells, cylindrical deep drawing, stretching circular shells, hydroforming.

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  • In the present study, we investigated the metal-binding reactivity of the isolated a domain of human metallothionein isoform 1a, with specific emphasis on resolving the debate concerning the cooperative nature of the metal-binding mechanism.

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  • (BQ) Part 1 book "Mechanics of sheet metal forming" has contents: Material properties, sheet deformation processes, deformation of sheet in plane stress, simplified stamping analysis, load instability and tearing, bending of sheet.

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  • The mechanism of ATP hydrolysis of a shortened variant of the heavy metal-translocating P-type ATPase CopB ofSulfolobus solfataricus was studied. The catalytic fragment, named CopB-B, comprises the nucleotide binding and phosphorylation domains. We demonstrated stoichiometric high-affinity binding of one nucleotide to the protein (Kdiss 1–20lm). Mg is not necessary for nucleotide association but is essential for the phospha-tase activity.

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  • Ca 2+ , as a messenger of signal transduction, regulates numerous target molecules via Ca 2+ -induced conformational changes. Investigation into the determinants for Ca 2+ -induced conformational change is often impeded by cooperativity between multiple metal-binding sites or protein oligomeriza-tion in naturally occurring proteins.

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  • (BQ) Part 2 book "Metal machining - Theory and applications" has contents: Finite element methods, applications of finite element analysis, process selection, improvement and control. Invite you to reference.

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  • (BQ) The adequate selection of manufacturing conditions is one of the most important aspects to take into consideration in the die-sinking electrical discharge machining (EDM) of conductive ceramics, as these conditions are the ones that are to determine such important characteristics as: surface roughness, electrode wear (EW) and material removal rate, among others. In this work, a study was carried out on the influence of the factors of intensity (I), pulse time (ti) and duty cycle (η) over the listed technological characteristics.

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  • The aim of this study was to investigate the effects of metal accumulation on the variation of glutathione S-transferase (GST) activities in some fishes (Cyprinus carpio L, Hypophthalmichthys molitrix, and Oreochromis niloticus) in Nhue-Day river basin. Samples for analysis were taken four times from September 2012 to July 2013.

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  • Our global environment now consists of numerous natural and artificial metals. Metals have played a critical role in industrial development and technological advances. Most metals are not destroyed; indeed, they are accumulating at an accelerated pace, due to the ever-growing demands of modern society. A fine balance must be maintained between metals in the environment and human health. It is with this view in mind that this book has been written to address diverse issues surrounding heavy metals in the environment.

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  • Monitoring the environment for metals has become a topic of considerable importance, not only to those industries emitting heavy metals but also to surveillance agencies and other organizations assessing the impact of metals on the environment. Our goal is to provide a comprehensive and easyto- read text for anyone working in the environmental analytical chemistry arena and to provide essential information to consultants and regulators about analytical and quality control procedures helpful in their evaluation and decision-making procedures.

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  • This workbook is intended to be a natural continuation of the CATIA V5 Workbook and covers a select group of advanced CATIA V5 work benches: Sketcher, Part Design, Assembly Design, Drafting, Generative Stress Analysis, Sheet Metal Designer, Kinematics, Prismatic Machining and Knowledgeware Tools.

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  • Chlorinated paraffins are one of the last classes of chlorinated compounds that are still being produced worldwide and used in high quantities in many applications. They are particularly used in cutting oils in the metal industry, but also as lubricants, plasticizers, flame retardants and as additives in adhesives, rubber, paints and sealants. This volume covers the state-of-the-art of methods for the synthesis and analysis of chlorinated paraffins. Experts in the field provide an overview of their worldwide occurrence and utilization and describe their toxicological properties.

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