fatigue behavior of a vanadium microalloy steel has been studied in this research. here, microstructure constituents were considered which essentially are dependent on the heat treatment conditions. the results of high cycle fatigue tests revealed that heat treatment procedure and cooling rates have significant effects on fatigue properties. optimal heat treatment cycle of the microalloyed stee...

background: nano-biotechnology is considered as one of the mainly vigorous field of research in new material science. recently, biosynthetic methods employing both biological microorganisms such as bacteria and fungus or plants extract have developed speedily as a trouble-free and feasible choice to obtain nanomaterials alternative to more complex chemical synthetic procedures. the particular d...

use of zinc and iron oxide are common in the desulfurization process from natural gas. in thisresearch, after determinations of the size and specifications through tem and xrd for each of the metaloxides, two different size ratios were used, 0.66 for zinc oxide and 0.142 for iron oxide. further, absorption of sulfur compounds in gas (hydrogen sulfide (h2s), carbonyl sulfide (cos), methyl mercap...

Transanal endoscopic microsurgery may be considered medically necessary for treatment of clinical T1 rectal adenocarcinomas than cannot be removed using other means of local excision and that meet all of the following criteria:  Located in the middle or upper part of the rectum  Well or moderately differentiated (G1 or G2)  Without lymphadenopathy or microscopic angiolymphatic invasion  Les...

One of the main limitations of imaging at high spatial and temporal resolution during in-situ TEM experiments is the frame rate of the camera being used to image the dynamic process. While the recent development of direct detectors has provided the hardware to achieve frame rates approaching 0.1ms, the cameras are expensive and must replace existing detectors. In this paper, we examine the use ...

Two clinical isolates of Escherichia coli, CF1179 and CF1295, were isolated from a patient hospitalized in the hematology unit of the University Hospital of Clermont-Ferrand, Clermont-Ferrand, France. They were resistant to penicillin-clavulanate combinations and to ceftazidime. The double-disk synergy test was positive only for isolate CF1179. Molecular comparison of the isolates showed that t...

This review describes use of transmission electron microscopy (TEM) in wood and fiber analysis. Analytical techniques and sample preparation methods are used to localize substructures of the cell wall polymers and are discussed in this review. The ultrastructural features of the wood cell walls, the structures formed by microfibrils, and the distribution of cell wall polymers, as revealed by TE...

A nationwide survey was carried out in Korea to assess the prevalence of Shigella strains producing extended-spectrum beta-lactamases (ESBLs). From 1991 to 2002, 5,911 clinical strains were isolated and screened for resistance to extended-spectrum cephalosporins. Twenty of the Shigella isolates were ESBL positive, based on the synergistic effects between clavulanate and selected beta-lactams (c...

OBJECTIVES To investigate the diversity of plasmids that carry bla(TEM-52) genes among Escherichia coli and Salmonella enterica originating from animals, meat products and humans. METHODS A collection of 22 bla(TEM-52)-encoding plasmids was characterized by restriction fragment length polymorphism (RFLP), replicon typing (by PCR or replicon sequencing), susceptibility testing, assessment of p...

Based on the sample type, TEM imaging can be classified into cross-sectional TEM (XTEM) and planeview TEM (PTEM). The advantage of XTEM is that it shows stacked layer structures that reflect the manufacturing process steps. Plane-view TEM, on the other hand, is suitable for cases where either the exact defect location has not been isolated for XTEM or the anomaly has affected structures more la...