axial compressive strength of steel and composite columns fabricated with high strength steel plate
new frontiers of organic and composite nanotechnology, 2008, p.505
... 9.4.1 Chemical Synthesis of PANI and PPy in the Presence of MnZn Ferrite and Ni/MnZn Ferrite 9.4.2 Electrochemical Synthesis of PANI and PPy in the Presence of MnZn Ferrite and Ni/MnZn Ferrite 9.4.3 ... University of Modena and Reggio Emilia, Modena, Italy alessandrini.andrea@unimo.it Silvana Andreescu Department of Chemistry and Biomolecular Science, Clarkson University, Potsdam, NY, USA eandrees@clarkson.edu ... The gold surface (with roughness of the order of the radius of nanoparticles) was covered and smoothened by 6–10 nm polyion layers Further ‘sandwiching’ of gold nanoparticles with thick polyion...
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Corrosion of Ceramic and Composite Materials Part 1 pptx
... Mortars, Plastics, Elastomers and Linings, and Fabrics: Fifth Edition, Revised and Expanded (Parts A, B, C, and D), Philip A Schweitzer 22 Corrosion of Ceramic and Composite Materials: Second Edition, ... Elastomers and Linings, and Fabrics: Third Edition, Revised and Expanded (Parts A and B), Philip A.Schweitzer Corrosion-Resistant Piping Systems, Philip A.Schweitzer Corrosion Resistance of Zinc and ... the case of hazardous waste disposal Engineers and scientists have been combating the attack upon ceramics of molten glass, molten metals and slags, and molten salts for hundreds of years with many...
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Corrosion of Ceramic and Composite Materials Part 3 docx
... corrosion of glasses, especially applied to nuclear waste glass leachability The earlier work of Newton and Paul [2.72] on a wide variety of glasses was expanded and then combined with that of Pourbaix ... equilibrium pH was greater The rate of hydrolysis of a glass surface is one of the major factors that delineates the field of commercial glasses The rate of hydrolysis is of great importance because ... simply because of the larger surface-tovolume ratio Since one of the major applications of fibers is as a reinforcement to some other material, the main property of interest is that of strength Thus,...
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Corrosion of Ceramic and Composite Materials Part 4 pptx
... subtracting the free energy of formation of the reactants from the free energy of formation of the products An example of the comparison of free energy of reaction and the enthalpy of reaction at several ... state of a mixture with the number of substances or components that make up the mixture and with the environmental conditions of temperature and/ or pressure The region above the solidus is of greatest ... discussion of the order of reactions and the various equations can be found in any book on kinetics [2.136] Integration of Eq (2.67) between concentration limits of c1 and c2 at time limits of t1 and...
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Corrosion of Ceramic and Composite Materials Part 5 pps
... Engineering limitations of ceramic composites for high performance and high temperature applications In Proc 1993 Conf on Processing, Fabrication and Applications of Advanced Composites, Long Beach, ... Heuer, A.H Review—Graphical displays of the thermodynamics of high- temperature gassolid reactions and their application to oxidation of metals and evaporation of oxides J Am Ceram Soc 1985, 68 (2), ... who understands the interaction of polarized and unpolarized light with the various features of the sample It is true that the preparation of a thin section is more tedious than that of a polished...
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Corrosion of Ceramic and Composite Materials Part 6 potx
... method that is often used is first soaking the samples in a molten salt and then performing a MOR test This evaluates both the hightemperature strength and the effects of corrosion upon strength Long-term ... major sources of error The idea of the ruggedness test is to determine the major sources of variation of a procedure and then minimize those variations to within acceptable limits Many standard tests ... 14.04, 15.01, and 15.02 A brief summary of each of these is given below Standards that are in the process of being developed have not been listed in Tables 4.1 and 4.2 These draft standards can...
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Corrosion of Ceramic and Composite Materials Part 10 potx
... containing Zr, Ba, and Th; U, Ba, and Mn; and Sc, Ba, and Y displayed a continuous decrease in corrosion rate with time Those containing Th, Ba, Mn, and Yb or Th, Ba, Zn, and Yb displayed a minimum ... dependence for removal of K or Pb but found a dependence that was linear with time This behavior was also reported by Eppler and Schweikert [6.19] and by Douglas and coworkers Wood and Blachere proposed ... pH
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Corrosion of Ceramic and Composite Materials Part 11 pot
... Corrosion of Composites Materials 295 TABLE 7.2 Acronyms Used in the Discussion of Composites With the advancement of the development of composites, there is an increasing number of acronyms with ... pressures of oxygen, active corrosion takes place with the formation of gaseous products of CO and SiO At higher partial pressures, passive oxidation occurs with the formation of CO and SiO2 that ... be considered composites The concept of composite materials is not a new idea and is definitely not limited to ceramics Nature has provided us with several excellent examples of composite materials...
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Corrosion of Ceramic and Composite Materials Part 12 potx
... Engineering limitations of ceramic composites for high performance and high temperature applications In Proc 1993 Conf on Processing, Fabrication and Applications of Advanced Composites; Long Beach, ... cathodic polarization and was dependent upon the overpotential and the cathodic reaction rate Oxidation of the matrix and fibers was thought to be the cause of ablation of the composite Aylor [7.88] ... Naslain, R Enhancement of the oxidation resistance of interfacial area in C/C composites Part III: the effect of oxidation in dry or wet air on mechanical properties of C/C composites with internal protections...
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Corrosion of Ceramic and Composite Materials Part 13 pot
... temperature, duration of dissolution, and crystallinity of the grain boundary phase In general, the flexural strength decreased with increasing dissolution of Y3+ and Al3+ cations Strengths were decreased ... 1000°C because of the softening of the glassy grain boundary phase A higher fatigue resistance was reported for higher frequencies of the load cycle due to the viscoelastic nature of the glassy ... 500, and 600°C This increase in Ka was attributed to oxidation of the Ce-apatite secondary phase and subsequent development of a surface compressive layer At longer times ( ~ hr) and the two higher...
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Corrosion of Ceramic and Composite Materials Part 14 pdf
... the strength of the bonding, and the amount of covalent bonding References have also been made to compact, strongly bonded glass structures being those with low thermal expansion and high softening ... crystalline phases with higher melting points or glassy compositions with higher viscosities to improve the hightemperature properties The densification processes using lower amounts of additives (generally ... temperature of the carbide solution formed 9.3.2 External Methods of Improvement One method of minimizing corrosion not widely practiced is that of coating the ceramic with a layer of more resistant...
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Báo cáo khoa học: Engineering and characterization of human manganese superoxide dismutase mutants with high activity and low product inhibition potx
... per plate After Directed evolution of hMnSOD mutants incubation of these replated mutant colonies at 37 °C for another 20–24 h, the average size of colonies on each of the mutant colony plates ... multiple cloning site of the vector by digestion with NcoI and PstI This vector backbone was excised from an agarose gel and purified For both standard and error-prone PCR amplification of hMnSOD genes, ... replacement of Tyr34 and Trp161 (with phenylalanine in both cases) resulted in a slower rate of zero-order decay (or an increased product inhibition effect) [21,24], certain substitutions of His30 and...
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Sexual and Reproductive Health Needs of Women and Adolescent Girls living with HIV pdf
... policy and programmatic gaps, regarding the rights and health needs of HIV-positive women and adolescent girls There is unevenness of health providers’ understanding of SRH of women living with ... comprehensive needs of those living with HIV and could provide humane treatment The attitudes of some providers suggested a lack of interest and limited capacity to offer integrated SRH services without ... improve access to and quality of SRH services for HIV-positive women and adolescent girls; approaches for reducing stigma and discrimination; and models of service delivery that link SRH and HIV programmes...
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Báo cáo khoa học: Kinetics of intra- and intermolecular zymogen activation with formation of an enzyme–zymogen complex ppt
... route of intramolecular activation of the zymogen into the active enzyme, E, and one or more peptides represented by W [route (a), Scheme 3] [12,22,25–27] and a route of autocatalytic activation of ... short time after the onset of the reaction, so that the kinetic behaviour of all of the species becomes uni-exponential from this time The higher the value of |k2| compared with k1, the shorter the ... [Z]-values are reached The fifth and seventh columns correspond to the relative error of [Z]-values obtained with Eqn (21) and Eqn (B1), respectively, compared with [Z]sim-values q (%) [Z]sim...
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Báo cáo toán học: " Overview of principles and implementations to deal with spatial issues in monitoring environmental effects of genetically modified organisms" pot
... representativeness of GMP EM sites and (3) to assess large-scale and long-term effects of GMP cultivation In Germany, several research projects dealt with these issues, and some of the methods applied and results ... levels of ecological organization in terms of structures and underlying functions, and correlated levels of time and space which have to be covered by GMP EM [4] The VDI [2] provides planning and ... Overview of principles and implementations to deal with spatial issues in monitoring environmental effects of genetically modified organisms Winfried Schröder†1 and Gunther Schmidt*†1 Chair of Landscape...
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báo cáo hóa học:" Overview of principles and implementations to deal with spatial issues in monitoring environmental effects of genetically modified organisms" pot
... representativeness of GMP EM sites and (3) to assess large-scale and long-term effects of GMP cultivation In Germany, several research projects dealt with these issues, and some of the methods applied and results ... levels of ecological organization in terms of structures and underlying functions, and correlated levels of time and space which have to be covered by GMP EM [4] The VDI [2] provides planning and ... Overview of principles and implementations to deal with spatial issues in monitoring environmental effects of genetically modified organisms Winfried Schröder†1 and Gunther Schmidt*†1 Chair of Landscape...
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Báo cáo y học: "A comparative study of anxiety and depression in patients with bronchial asthma, chronic obstructive pulmonary disease and tuberculosis in a general hospital of chest diseases" ppsx
... participate and were therefore excluded The study included 132 patients (78 men and 54 women) in the pulmonary departments of our hospital Of them, 42 were diagnosed with BA, 60 with COPD and 30 with ... psychogenic and somatic pain, frequent hospital admissions and dependency from medical and nursing personnel The observed higher prevalence of depression and anxiety in patients with chronic ... are the group with the higher and more severe depression comorbidity Depression in patients with chronic respiratory diseases coexists with anxiety and is related to the chronicity of the disease...
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Báo cáo y học: "Association of FCGR2A and FCGR2A-FCGR3A haplotypes with susceptibility to giant cell arteritis" pdf
... component, and there is a strong association with HLA-DRB1*04 in many different populations [4] Within cohorts of biopsy-proven GCA, HLA-DRB1*04 is associated with systemic signs and symptoms ... the FCGR locus is complex in view of the high level of structural homology between the three class II (FCGR2A, FCGR2B and FCGR2C) and two class III (FCGR3A and FCGR3B) receptors Gene duplication ... cohort of 85 GCA cases and 130 controls provides 80% power to detect an odds ratio (OR) of 2.5 or 2.9 for a dominant and recessive mode of inheritance, respectively, assuming an allele frequency of...
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Báo cáo khoa học: "Analysis of clinical and dosimetric factors associated with severe acute radiation pneumonitis in patients with locally advanced non-small cell lung cancer treated with concurrent chemotherapy and intensity-modulated radiotherapy" pot
... Gy (V30), with NTCP and MLD SARP occurred in 45% and 37% of patients with MLD of more than 15 Gy and NTCP of 50% or more, respectively, whereas it occurred in 0% of patients with a MLD of 10 Gy ... (NTCP/V10) and the incidence of SARP for 94 patients; the incidences of SARP in the group with NTCP > 4.2% and NTCP ≤ 4.2% were 43.5% and 1.4%, respectively (p < 0.01); the incidences of SARP in ... GZ and AS participated in the design of the study and performed the statistical analysis and drafted the manuscript HW, RY, FL and BX participated in acquisition of data All authors read and...
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Báo cáo khoa học: "[18F]fluoroethylcholine-PET/CT imaging for radiation treatment planning of recurrent and primary prostate cancer with dose escalation to PET/CT-positive lymph node" potx
... with or without lymphadenectomy of which one patient presented with PET/CT positive lymph nodes (iliac and paraaortal) within two years Seven patients had primary disease Details of patient and ... volume In intermediate and high risk patients with primary disease, the prostate gland and seminal vesicles were included up to a maximum dose of 66,6 Gy In case of involvement of the seminal vesicles, ... an SUV max of 6,0 and an maximum diameter of 1,6 cm The patient received IMRT irradiation of the pelvic lymph nodes to 45 Gy (five weekly fractions of 1,8 Gy) with a total boost dose of 66,6 Gy...
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