Preparation of Silicalite Membranes on Stainless Steel Grid Supports

2005 ◽  
Vol 44 (20) ◽  
pp. 7627-7632 ◽  
Author(s):  
Fausto López ◽  
M. Pilar Bernal ◽  
Reyes Mallada ◽  
Joaquín Coronas ◽  
Jesús Santamaría
2005 ◽  
Vol 109 (5) ◽  
pp. 1699-1702 ◽  
Author(s):  
Xiang Yu Xu ◽  
Hong Zhou Zhang ◽  
Qing Zhao ◽  
Yao Feng Chen ◽  
Jun Xu ◽  
...  

2017 ◽  
Vol 7 (3) ◽  
pp. 161-165
Author(s):  
Vivek Patni ◽  
Bhagyashree S Jadhav ◽  
Priyanka Pawar

ABSTRACT Microimplants have ushered in the concept of absolute anchorage by intraoral means with the added benefit of being completely operator dependent. These factors ensure efficient anchorage control. However, these benefits come at the cost of precise placement considering the proximity of anatomically significant structures. It is of utmost importance to avoid damage to roots in case of interradicular placement. In order to overcome this difficulty, the following case report describes an innovative grid-guide template with an anti-inflammatory adhesive backing for accurate and easy microimplant placement. The assembly consists of a stainless steel grid mesh stuck on a micropore surgical tape with trioplast dental paste on the tissue-facing surface. It is an accurate, efficient, economical, and easy method of microimplant placement. How to cite this article Jadhav BS, Patni V, Pawar P. Use of a Disposable Self-adhesive Grid for Accurate Microimplant Placement. J Contemp Dent 2017;7(3):161-165.


Author(s):  
L.E. Murr ◽  
J.S. Dunning ◽  
S. Shankar

Aluminum additions to conventional 18Cr-8Ni austenitic stainless steel compositions impart excellent resistance to high sulfur environments. However, problems are typically encountered with aluminum additions above about 1% due to embrittlement caused by aluminum in solid solution and the precipitation of NiAl. Consequently, little use has been made of aluminum alloy additions to stainless steels for use in sulfur or H2S environments in the chemical industry, energy conversion or generation, and mineral processing, for example.A research program at the Albany Research Center has concentrated on the development of a wrought alloy composition with as low a chromium content as possible, with the idea of developing a low-chromium substitute for 310 stainless steel (25Cr-20Ni) which is often used in high-sulfur environments. On the basis of workability and microstructural studies involving optical metallography on 100g button ingots soaked at 700°C and air-cooled, a low-alloy composition Fe-12Cr-5Ni-4Al (in wt %) was selected for scale up and property evaluation.


Author(s):  
J. A. Korbonski ◽  
L. E. Murr

Comparison of recovery rates in materials deformed by a unidimensional and two dimensional strains at strain rates in excess of 104 sec.−1 was performed on AISI 304 Stainless Steel. A number of unidirectionally strained foil samples were deformed by shock waves at graduated pressure levels as described by Murr and Grace. The two dimensionally strained foil samples were obtained from radially expanded cylinders by a constant shock pressure pulse and graduated strain as described by Foitz, et al.


Author(s):  
R. Gonzalez ◽  
L. Bru

The analysis of stacking fault tetrahedra (SFT) in fatigued metals (1,2) is somewhat complicated, due partly to their relatively low density, but principally to the presence of a very high density of dislocations which hides them. In order to overcome this second difficulty, we have used in this work an austenitic stainless steel that deforms in a planar mode and, as expected, examination of the substructure revealed planar arrays of dislocation dipoles rather than the cellular structures which appear both in single and polycrystals of cyclically deformed copper and silver. This more uniform distribution of dislocations allows a better identification of the SFT.The samples were fatigue deformed at the constant total strain amplitude Δε = 0.025 for 5 cycles at three temperatures: 85, 293 and 773 K. One of the samples was tensile strained with a total deformation of 3.5%.


Author(s):  
Y. L. Chen ◽  
J. R. Bradley

Considerable effort has been directed toward an improved understanding of the production of the strong and stiff ∼ 1-20 μm diameter pyrolytic carbon fibers of the type reported by Koyama and, more recently, by Tibbetts. These macroscopic fibers are produced when pyrolytic carbon filaments (∼ 0.1 μm or less in diameter) are thickened by deposition of carbon during thermal decomposition of hydrocarbon gases. Each such precursor filament normally lengthens in association with an attached catalyst particle. The subject of filamentous carbon formation and much of the work on characterization of the catalyst particles have been reviewed thoroughly by Baker and Harris. However, identification of the catalyst particles remains a problem of continuing interest. The purpose of this work was to characterize the microstructure of the pyrolytic carbon filaments and the catalyst particles formed inside stainless steel and plain carbon steel tubes. For the present study, natural gas (∼; 97 % methane) was passed through type 304 stainless steel and SAE 1020 plain carbon steel tubes at 1240°K.


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