properties of structural steel and aluminum shapes

... overview of the results of the mechanical and metallurgical analysis of structural steel from the World Trade Center (WTC), part of the National Institute of Standards and Technology Investigation of ... disaster of September 11, 2001 The goal of the study was threefold: Determine mechanical properties of WTC structural steel, Determine the quality of the steel and if design requirements were met, and ... loads, and aircraft impact damage on the structural, fire protection, and egress systems Determine and analyze the mechanical and metallurgical properties and quality of steel, weldments, and connections...

Ngày tải lên: 01/04/2014, 00:20

... lowered afnity of cystatin F for these enzymes Proline in the S2 site is a feature of human sten A and cystatins F, S and SN, all of which are signicantly less potent inhibitors of cathepsin B ... lysosomal localization of cystatin F, its restricted and readily regulated expression [18], selective and not too potent inhibition of cathepsins are all in favor of the active role of cystatin FEBS ... C and K (not shown) The results for cathepsin S were less clear and showed partial colocalization of the two proteins (Fig 3B) As both primary antibodies for cathepsin F and cystatin F were of...

Ngày tải lên: 19/02/2014, 17:20

... (Fig 4A) In the case of the E315Q mutant, an additional faint band was also seen at an Mr of  43 000 This band appeared as a degradation product during freezing and thawing of the protein that ... investigated Of three newly generated chitinase A variants, the hydrolytic activity of E315M and E315Q mutants was entirely abolished Apparently, structural modification of the carboxylate side-chain of ... (GlcNAc)6, and chitin substrates were also determined, based on the formation of (GlcNAc)2 and the initial velocity of the enzyme, at of reaction at 20 °C Kinetic values for the recombinant wild-type and...

Ngày tải lên: 20/02/2014, 01:20

... results of measurements of the effects of ATP, ADP, AMP and adenosine on the corresponding low pH-induced blue-shift in the absorption maximum of maize PLB, made in the presence and absence of NaF, ... spectral changes in POR and structural changes in PLB The existence of a correlation between the presence of the cubic membrane structure of the PLB and the presence of POR-PChlide650 has long ... spectral properties of POR and structural properties of PLB similar to those studied in this paper have been reported to occur in salt-washed PLB [12,27] The two phenomena are clearly related and...

Ngày tải lên: 22/02/2014, 04:20

... understanding and will be the focus and repeating theme throughout the text A sound understanding of cardiac physiology begins with basic understanding of cardiac anatomy and of the physiology of ... composed of bundles of myosin strands with each strand having a tail, a hinge and a head region The tail regions bind to each other in the central portion of the filament and the Page of 23 strands ... of this manuscript is to provide a detailed understanding of the heart as a muscular pump and of the interaction between the heart and the vasculature The concepts of contractility, preload and...

Ngày tải lên: 22/02/2014, 09:20

... degree of sequence conservation [12,13], and are thought to share a similar functional mechanism Thus, DnaK and mtHsp70 cooperate with the co-chaperones DnaJ and GrpE in bacteria, and with Mdj1p and ... were linear and k+1 and k)1 were derived from the y-intercept and the slope, respectively (Table 1) [31] Comparison of wild-type DnaK and mtHsp70 showed that the binding constants of the latter ... Hsp70–peptide complexes, and the refolding activity which might reflect a destabilization of the PBD Conformational properties of wild-type and chimeric proteins: fluorescence and infrared spectroscopy...

Ngày tải lên: 16/03/2014, 22:20

... The effect of geometrical parameters and material properties of face sheets and core are studied on the face wrinkling of sandwich plates Comparison of the present results with those of plate theories ... anisotropic properties of strength and stiffness of masonry in horizontal and vertical direction, tensile and shear stiffness of cracked masonry, • Concrete yielding in compression, opening of cracks ... tension, mechanism of opening and closing of cracks in concrete under dynamic load, tensile and shear stiffness of cracked concrete, • Strain rate effect of the material properties of masonry, reinforced...

Ngày tải lên: 16/03/2014, 22:20

... Activation and degradation characteristics of this recombinant preparation was documented and compared to those of cationic trypsinogen Furthermore, interactions between the two isoforms were studied and ... saved as TIFF files Quantitation of gel bands was carried out with the IMAGEQUANT 5.2 (Molecular Dynamics) software Rectangles were drawn around each band of interest, and an identical rectangle was ... visible bands of larger peptide fragments, as the bulk of the protein was digested to small peptides In contrast, in the presence of mM Ca2+, the trypsinogen band was converted to trypsin and stable...

Ngày tải lên: 17/03/2014, 03:20

... determination of both thermodynamic and kinetic properties of NR1, and as we have shown for CPR and P450 BM3 (23,24,28) the properties of the flavin binding domains of NR1 are likely to mimic the redox properties ... reduction of substrate (DCPIP or ferricyanide) at appropriate wavelengths (600 nm and 420 nm, respectively) Results are the mean and standard deviation of triplicate assays For the determination of ... unconstrained, and regression analysis provided values in close agreement to those of the initial estimates Ó FEBS 2003 Redox properties of human NR1 (Eur J Biochem 270) 1167 Results Expression and purification...

Ngày tải lên: 23/03/2014, 21:20

... loads, and aircraft impact damage on the structural, fire protection, and egress systems Determine and analyze the mechanical and metallurgical properties and quality of steel, weldments, and connections ... dimensions and standards 57 Table 3–11 Summary of mechanical properties and chemical compositions, and specifications for truss steels tested 58 Table 3–12 Summary of mechanical properties, ... maintenance of the structural, passive fire protection, and emergency access and evacuation systems of WTC 1, 2, and Analyze the baseline performance of WTC and WTC under design, service, and abnormal...

Ngày tải lên: 01/04/2014, 00:20

... in the middle of a quartz tube and heated to 350°C for between 30 and a few hours under continuous flow of a hydrogen-containing forming gas The optical properties of as-grown and annealed samples ... using standard lock-in detection technique Results and discussion The optical properties of the as-grown and annealed QDs on CHP structure are analyzed against those of the controlled QDs and CHP ... intensity and FWHM (a) PL spectra of sample D [QDs on CHP] subject to 350°C ex situ hydrogen annealing for 0, 30, 60, and 120 (offset for clarity) Changes in (b) integrated intensity and (c) FWHM of...

Ngày tải lên: 21/06/2014, 01:20

... significantly decreases Dt and Sa The effects of pull and heat are very similar and not as significant as the effect of velocity Delay and pressure are factors to change the taper length of the pipettes ... inside wall and 3D structures of the inner wall were obtained using MeX software Figures and 10 show an FIB-milled pipette and stereo images Table shows inner surface properties of small b m ... phase of the pull cycle The unit of pressure is psi Changes of less than 10 units will not be noticeable Pressure is another way of controlling tip length and does not change the size of pipette...

Ngày tải lên: 21/06/2014, 03:20

... dipole of CoTPPS4- and that of H2TAPP4+ in the formation process of porphyrin nanoand micro-particles [33, 34] The Soret and Q bands of sample solution placed for 72 h are not shifted, and the ... is one of the proofs that the pyramids consist of CoTPPS4- and H4TAPP6+ Figure 1c, d shows the images of samples and 3, respectively In Fig 1c, the diameter of the spheres is in the range of 250–1,300 ... porphyrin nano- and micro-particles made up of J- and H-heteroaggregates to date [26] The photocatalytic and photoelectronic properties of TiO2 sensitized with this type of porphyrin nano- and micro-particles...

Ngày tải lên: 22/06/2014, 01:20

... demonstrated that the PL of CdSe core and CdSe/ZnS core/shell QDs in the first ns arises from the intrinsic bright ± 1U and ± 1L states with lifetime of about 60 ps and 450 ps, respectively, and from surface ... superposition of three lorentzian curves (see inset of Fig 1A), obtaining the energetic separations among the three states, E1,2 and E2,3 We found E1,2 = 21 meV and E2,3 = 16 meV for core QDs and E1,2 ... times from intrinsic bright states of the fine structure of spherical CdSe QDs [4] into the surface defect states [5], and t3 is comparable with typical lifetime of surface-related emission in CdSe...

Ngày tải lên: 22/06/2014, 18:20

... MOLASSES AND LIGNIN 3.1 Molasses Molasses is a brown viscous liquid and is produced from sugar cane and beet The chemical components of molasses consist of sucrose and saccharides such as glucose and ... hydrogels) Applied stress, strain and frequencies have a wide range according to the kind of sample and shape of probe Although there are various shapes of probe, two kinds of probe were used as shown ... the number of the specimens should be more than three and significant figures of size and those of mass should be coordinated Density Characterization of Green Polymers 27 Density of the sample...

Ngày tải lên: 27/06/2014, 15:20

... Wood extracts and colour stability Figure Absorption spectra of methanol solutions of 1.0 10−4 M DPPH and of oak extract at 0.3, 1.0, and 3.0 g L−1 527 Figure Correlation between ε280 and total ... colour stability of a wood and antioxidant capacity of its extracts MATERIALS AND METHODS 2.1 Chemicals, industrial extracts, and wood samples Reagents were the purest grade of Fluka, Merck, ... Kinetics of reaction of extracts with DPPH was studied as follows Methanol solutions of 10−4 M DPPH and of g/L extract were mixed in the stopped-flow apparatus (final concentrations 10−4 M and g L−1...

Ngày tải lên: 07/08/2014, 16:20

... release and persistence of organic acids (ligands) capable of mobilizing Fe and Al Consequently, the study of relationships between forest floor properties and the degree of development of albic and ... in morphological and chemical properties of forest floor and mineral soil, and each accumulation of DW was examined for the origin (species) and age of decay The objectives of the present study ... for each sample of albic horizon; t is its thickness (cm) and Vand Care the numerical values of its Munsell value and chroma; and Due to the design of the study, the thickness of the forest floor...

Ngày tải lên: 08/08/2014, 19:21

... clinical use Interactions of BMMSCs and F-MSCs with subpopulations of leukocytes, and mechanisms of actions–when investigated–are reviewed Interactions of human BMMSCs and F-MSCs with leukocyte ... stimulatory capacity of DCs Moreover, F-MSCs inhibit the proliferation and cytokine secretion of T cells and promote the expansion of Tregs of such data will help to shed more light and clarity on ... of BMMSCs and immunosuppressive drugs can prolong organ allograft survival [135,136] Because of the profound immunomodulatory effect of BMMSCs shown in vitro and in vivo, co-transplantation of...

Ngày tải lên: 10/08/2014, 05:21

... Topics in Thermal Analysis and Calorimetry Volume Series Editor: Judit Simon, Budapest University of Technology and Economics, Hungary Thermal Properties of Green Polymers and Biocomposites by Tatsuko ... high profile research subjects in academic and industrial fields The authors of this book have continuously made efforts to investigate the properties, especially thermal properties, of green ... CHARACTERIZATION OF GREEN POLYMERS Thermal Analysis 13 Other Characterization Methods 25 Chapter THERMAL PROPERTIES OF CELLULOSE AND ITS DERIVATIVES Introduction 39 Thermal Properties...

Ngày tải lên: 11/08/2014, 06:20

... hydrogels) Applied stress, strain and frequencies have a wide range according to the kind of sample and shape of probe Although there are various shapes of probe, two kinds of probe were used as shown ... the number of the specimens should be more than three and significant figures of size and those of mass should be coordinated Density Characterization of Green Polymers 27 Density of the sample ... Characterization of Polymeric Materials 2nd ed Academic Press, Orlando 33 Hatakeyama, T and Liu, Z., 1998, Handbook of Thermal Analysis John Weily, Chichester 34 Liu, Z and Hatakeyama, T and Zhang,...

Ngày tải lên: 11/08/2014, 06:20