Characterization of Microstructure Variations by Laser-Ultrasound during and after the Heat Treatment of Metals

ABSTRACTSolid sol of silver in poly(methyl methacrylate), Ag/PMMA, was prepared by bulk polymerization of methyl methacrylate solution of silver (I) triflluoroacetate (AgTfa) and followed by postheating. The formation of the metallic Ag nanocluster was characterized by visible spectroscopy, and effects of the concentrations of AIBN and AgTfa and the heat-treatment duration on the formation of Ag cluster were investigated. Furthermore, based on the kinetic study of MMA in the presence of AgTfa, possible mechanism for the reduction and agglomeration of silver is proposed.

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Characterization of phases in Mg-10Y-5Gd-2Zn-0.5Zr alloy processed by heat treatment

Transactions of Nonferrous Metals Society of China ◽

10.1016/s1003-6326(09)60420-9 ◽

2010 ◽

Vol 20 (11) ◽

pp. 2076-2080 ◽

Cited By ~ 7

Author(s):

Qu-dong WANG ◽

Yan GAO ◽

Dong-di YIN ◽

Chang-jiang CHEN

Keyword(s):

Heat Treatment

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Detection and characterization of a factor which rescues spliceosome assembly from a heat-inactivated HeLa cell nuclear extract

Molecular and Cellular Biology ◽

10.1128/mcb.11.7.3425-3431.1991 ◽

1991 ◽

Vol 11 (7) ◽

pp. 3425-3431

Author(s):

P Delannoy ◽

M H Caruthers

Keyword(s):

Heat Treatment ◽

Hela Cell ◽

Nuclear Extract ◽

Mrna Splicing ◽

Splicing Factor ◽

Nuclear Extracts ◽

Small Nuclear Rnas ◽

A Minor ◽

Cell Nuclear Extract

Mild heat treatment of HeLa cell nuclear extracts (NE) selectively inhibits pre-mRNA splicing. Heat-inactivated extracts can be complemented by a small amount of untreated NE. Utilizing this complementation assay and a combination of ion-exchange, affinity, and hydrophobic chromatography, a heat reversal factor (HRF) was purified from NE that is required to rescue pre-mRNA splicing from a heat-inactivated extract. This activity in its most purified form consistently copurified in a fraction containing two 70-kDa proteins and a minor polypeptide of approximately 100 kDa. It was free of the major small nuclear RNAs, sensitive to protease, and required to rescue spliceosome formation from a heat-inactivated nuclear extract. These results suggest that this factor is a protein that may be an important component in pre-mRNA splicing, or alternatively, it may be involved in renaturation of a heat-sensitive splicing factor.

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Synthesis and Characterization of Mnbi Magnetic Alloy via Two Different Processing Routes

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.875.76 ◽

2021 ◽

Vol 875 ◽

pp. 76-80

Author(s):

Hifsa Mazhar ◽

Wilayat Hussain

Keyword(s):

Heat Treatment ◽

Melt Spinning ◽

Treatment Time ◽

Magnetic Energy ◽

Microstructural Characterization ◽

Temperature Phase ◽

Magnetic Alloy ◽

Positive Temperature ◽

Melt Spinning Technique

Manganese bismuth alloy has gained importance due to its rare earth free elements, positive temperature coefficient and unique magnetic properties. Low temperature phase (LTP) MnBi was successfully prepared by arc melting with subsequent heat treatments and melt spinning technique followed by heat treatment for different durations. LTP MnBi formation was confirmed using XRD analysis and microstructural characterization of the samples was done using field emission scanning electron microscope. MnBi with greater LTP amount was formed by melt spinning route when compared with its counter arc melted one. Magnetic energy density of LTP MnBi formed by melt spinning technique with different heat treatment time was studied.

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