product engineering of nanoscaled materials

Chemistry of nanostructured materials

Ngày tải lên : 23/04/2013, 14:23

... area of mesoporous materials [5-9] or with specific segments of this field such as catalysis [10] and adsorption by mesoporous materials [11-13] A number of reviews dealing with different types of ... goal of the current research on microporous materials [16] Even though microporous materials include those with pore sizes between 10 to 20Å, The vast majority of known crystalline microporous materials ... use of germanium has also led to the synthesis of the pure polymorph C of zeolite beta (BEC) even in the absence of the fluoride medium that is generally believed to assist in the formation of...

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The chemistry of nanostructured materials

Ngày tải lên : 23/04/2013, 20:25

... area of mesoporous materials [5-9] or with specific segments of this field such as catalysis [10] and adsorption by mesoporous materials [11-13] A number of reviews dealing with different types of ... goal of the current research on microporous materials [16] Even though microporous materials include those with pore sizes between 10 to 20Å, The vast majority of known crystalline microporous materials ... use of germanium has also led to the synthesis of the pure polymorph C of zeolite beta (BEC) even in the absence of the fluoride medium that is generally believed to assist in the formation of...

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Machining of Hard Materials

Ngày tải lên : 18/10/2013, 03:15

... speeds of up to 42,000 rpm and finishing laser machining can be very profitable for hard part machining The elimination of EDM operations and the use of laser shaping result in shortening of the production ... 4.5 Comparison of traditional and high-speed machining (HSM)-based processes used in die and mould manufacture Machining of Hard Materials 101 Figure 4.6 New method of production of bearing rings: ... possible to obtain a surface finish of Ra about 0.3 µm Typical applications of HB include finishing of a variety of internal profiles such as prismatic internal profiles, internal gear flanks, multiple...

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Static properties of granular materials Philippe Claudin

Ngày tải lên : 01/11/2013, 08:20

... probably one of the issues that has been at the origin of the interest of many physicists for granular materials [359] The last point of this subsection will be dedicated to the study of the stress ... a series of captors), and are thus much noisier 250 Static properties of granular materials F r p h z Fig 14.13 Sketch of the experimental set-up of Reydellet et al for the measure of the pressure ... horizontal position of the apex of the pile – also, changing the sign of x changes that of the shear σx z More generally, the stress state of the jammed grain packing is assumed to be of the form σx...

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The thermodynamics of granular materials Sir Sam Edwards and Raphael Blumenfeld

Ngày tải lên : 01/11/2013, 08:20

... heap of hot sand will have many of the characteristics of a heap of cold sand) and we can write S = Sth + Sconf (13.19) It is interesting to note that conﬁrmation of this ‘thermodynamics’ of granular ... function of the coordination We shall see later that the mean coordination number is a parameter that plays a central role in the behaviour of granular materials 212 The thermodynamics of granular materials ... sketch of the density of granular matter in a vessel after being shaken at amplitude A Adapted from [172, 173, 356] Detailed studies of the density of shaken granular systems as a function of the...

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Tài liệu Final report "The Situation of Learning English for Electrical Engineering of D06k52 Students in Faculty of Foreign Language, Ha Noi University of Technology" docx

Ngày tải lên : 13/12/2013, 12:15

... Faculty of Foreign Language Ha Noi University of Technology The Situation of Learning English for Electrical Engineering of D06k52 Students in Faculty of Foreign Language, Ha Noi University of Technology ... Bich Ngoc D06K52 Faculty of Foreign Language Ha Noi University of Technology Introduction This report discusses the situation of learning EEE of d06, k52 students in FOFL, HUT Before studying ... test.] Le Thi Bich Ngoc D06K52 Faculty of Foreign Language Ha Noi University of Technology Methodology The situation of learning EEE of d06, k52 students in FOFL, HUT is investigated through questionnaire...

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Tài liệu Mechanical Properties of Engineered Materials P2 pptx

Ngày tải lên : 23/12/2013, 00:15

... and 2.8(f) These may be thought of as the absence of a plane of atoms (intrinsic stacking faults) or the insertion of rows of atoms that disturb the arrangement of atoms (extrinsic stacking faults) ... time-dependent ﬂow of materials at temperatures greater than $0.3–0.5 of the melting temperature in degrees Kelvin Also, the activation energy, Q, in Eq (2.10) is indicative of the actual mechanism of diffusion, ... approximately 0.3–0.5 of the melting temperature in degrees Kelvin Since the evolution of microstructure is often controlled by diffusion processes, a brief introduction to elementary aspects of diffusion...

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Tài liệu Mechanical Properties of Engineered Materials P1 pptx

Ngày tải lên : 23/12/2013, 00:15

... classes of materials Following a brief introduction to materials science and basic strength of materials, the fundamentals of elasticity and plasticity are presented, prior to a discussion of strengthening ... extended to Prof Tom Eager and Prof Nam Suh of MIT for inviting me to spend a sabbatical year as Visiting Martin Luther King Professor in the departments of Materials Science and Engineering and ... macroscopic level of understanding of structure [Figs 16(a)–(d)] They are often unaware of the atomic and microstructural constituents that can affect the mechanical behavior of materials and of the role...

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Tài liệu Supply and stock of raw materials pptx

Ngày tải lên : 25/01/2014, 00:20

... PB-Nr: S05 Supply and stock of raw materials flow/process documentation/competence Issed by Hr Bauer Date of release Version 00 Page 2/5 PB-Nr: S05 Supply and stock of raw materials Supplier Documents ... stock of raw materials Check of delivery documents The delivery note transferred by the driver is compared with the specification of the PPS for this order, in order to control the identity of the ... instructions of M08.02 to be executed Issed by Hr Bauer Date of release Version 00 Page 4/5 PB-Nr: S05 Supply and stock of raw materials Applicable documents Factory regulations Handling dangerous materials...

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Development of supplementary materials to improve reading skills for the first year english majors at military science academy

Ngày tải lên : 29/01/2014, 14:39

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Tài liệu Báo cáo khoa học: Enhanced thermostability of methyl parathion hydrolase from Ochrobactrum sp. M231 by rational engineering of a glycine to proline mutation pdf

Ngày tải lên : 15/02/2014, 01:20

... 1, whereas the T50 of G198P was lower than that of the WT enzyme The T50 of the double point mutant (G194P ⁄ G198P) was similar to that of the WT enzyme and between those of G194P and G198P To ... energies of the G194P were lower than those of the WT enzyme (Table 2) As the structure of the G194P mutant become more stable than that of the WT enzyme, the rmsf values (calculated by the MDS) of ... efﬁciency (kcat ⁄ Km) of the mutant G198P was lower than that of the WT enzyme The overall catalytic efﬁciency (kcat ⁄ Km) of the double point mutant (G194P ⁄ G198P) was similar to that of the WT enzyme...

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Tài liệu Báo cáo khoa học: Efﬁcient RNA ligation by reverse-joined hairpin ribozymes and engineering of twin ribozymes consisting of conventional and reverse-joined hairpin ribozyme units ppt

Ngày tải lên : 20/02/2014, 01:20

... After another 105 of incubation, further enrichment of products involving ligation to the 20-mer fragment S20 cp was observed The ratio of product to initial substrate increased; 9% of substrate RNA ... cleavage of the substrate followed by dissociation of the 16-mer versus favourable ligation of the 20-mer The yield of product RNA P44F3F5 could be further increased by stabilization of the ribozyme ... nucleotides of HP–TWRJ (for details refer to main text) (B) Model duplexes used for determination of melting points The sequence of the educt and product duplex corresponds to the sequence of HP–TWRJ...

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ADVANCED MECHANICS OF COMPOSITE MATERIALS pptx

Ngày tải lên : 05/03/2014, 15:20

... ADVANCED MECHANICS OF COMPOSITE MATERIALS ADVANCED MECHANICS OF COMPOSITE MATERIALS Valery V Vasiliev Distinguished Professor Department of Mechanics and Optimization of Processes and Structures ... Structures Russian State University of Technology, Moscow Evgeny V Morozov Professor of Mechanical Engineering Division of Engineering Science & Technology The University of New South Wales Asia, Singapore ... technology and, ﬁrst of all, to mechanics of composite materials which is discussed in this book in conjunction with analysis of composite materials As we hope, thus constructed combination of material...

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Báo cáo khoa học: Increased NADPH concentration obtained by metabolic engineering of the pentose phosphate pathway in Aspergillus niger docx

Ngày tải lên : 07/03/2014, 17:20

... for citric acid-producing mycelia [26] Overproduction of 6PGDH resulted in an increase of synthesis of pyridine nucleotide cofactors, as the total pool of these increased Whether the synthesis ... biosynthesis of cell wall components The Aspergillus niger gene encoding G6PDH (gsdA) has been cloned, but transformation of the fungus with this gene resulted in only low levels of overproduction of G6PDH ... high level of G6PDH overproduction might result in a low lethal NADP ⁄ NADPH ratio in the cell [13] Therefore, in this study isolation of transformants with a higher overproduction of G6PDH was...

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Báo cáo Y học: Human immunoglobulin A (IgA)-speciﬁc ligands from combinatorial engineering of protein A ppt

Ngày tải lên : 08/03/2014, 23:20

... (response units) of HSA and 5300 RU of IgA2167 were immobilized in different ﬂow cells Initial analyses of selected variants were performed using the HSA surface by injection of 25 lL (25–70 lM) ... mL of an overnight culture of E coli, strain RR1DM15, was pelleted by centrifugation, redissolved in 10 mL · TST buffer and lysed by sonication One milliliter of the lysate into which 0.1 mg of ... (Sigma–Aldrich) RESULTS Selection and production of afﬁbody variants A phage displayed protein library constructed by combinatorial mutagenesis of surface-located positions of the IgGbinding domain Z was...

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mechanical properties of engineered materials

Ngày tải lên : 14/03/2014, 17:44

... classes of materials Following a brief introduction to materials science and basic strength of materials, the fundamentals of elasticity and plasticity are presented, prior to a discussion of strengthening ... extended to Prof Tom Eager and Prof Nam Suh of MIT for inviting me to spend a sabbatical year as Visiting Martin Luther King Professor in the departments of Materials Science and Engineering and ... macroscopic level of understanding of structure [Figs 16(a)–(d)] They are often unaware of the atomic and microstructural constituents that can affect the mechanical behavior of materials and of the role...

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COMPUTER MODELLING OF MICROPOROUS MATERIALS potx

Ngày tải lên : 15/03/2014, 18:20

... properties and reactivities of these materials This book focuses on the use of modelling techniques in the science of microporous materials whose complexity and extensive range of applications both ... developing ﬁeld of the prediction of new microporous structures, which we follow with a brief account of the development of models for mesoporous structures We conclude with a survey of the role of static ... characterisation of any hypothetical zeolite must therefore include an analysis of framework topology and of the types of building unit present, as well as some estimate of the thermodynamic stability of the...

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Báo cáo khoa học: Protein engineering of pyruvate carboxylase Investigation on the function of acetyl-CoA and the quaternary structure doc

Ngày tải lên : 16/03/2014, 16:20

... rate of the ATP cleavage reaction is about 0.2% of that of the complete reaction of PC, which almost coincides with that reported for chicken liver enzyme [21] ể FEBS 2004 Protein engineering of ... form of PC is built up in the following way: rst, a dimer of PC is formed through the association of each (CT + BCCP) domain of two protomers of PC, and subsequently, individual BC domains of the ... absence of acetyl-CoA was approximately 0.3% of the maximum (Table 1) PC is known to catalyze the cleavage of ATP in the absence of pyruvate [21] It is hence possible to study the reaction of BC...

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Mathematical Modeling in Mechanics of Granular Materials potx

Ngày tải lên : 16/03/2014, 22:20

... problem of description of mechanical properties of existing materials to the study of the inverse problem of production of materials with preassigned properties This approach requires development of ... At the present level of development of a production technology of artiﬁcial materials, including those of engineering plastics, high-polymeric materials, and composites of various structures, ... agriculture production, problems of design of storage bunkers and grain tanks, problems of design of chemical machines with a boiling granular layer, problems of modeling of avalanching, etc In spite of...

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Mechanics and Properties of Composed Materials and Structures doc

Ngày tải lên : 16/03/2014, 22:20

... Chair of Engineering Mechanics Institute of Mechanics Otto-von-Guericke-University Magdeburg Germany Lucas F M da Silva Department of Mechanical Engineering Faculty of Engineering University of ... researchers participating in the conference The book will offer the state -of- the-art of tremendous advances in engineering technologies of composed materials with complex behavior and also serve as an ... simulation of sliding and shear failure of the joint The adopted model of shear strength capacity of the joint is given in Fig 18 The modelling of shear failure is similar to that of the masonry,...

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