Results 141 to 150 of about 16,792 (181)
Some of the next articles are maybe not open access.
Alloy Digest, 1971
Abstract AISI Type H21 is a tungsten-chromium hot-work tool and die steel having good red-hardness and resistance to abrasion with relatively good shock resistance. It will withstand high operating temperatures up to 1000 F for long periods of time.
openaire +1 more source
Abstract AISI Type H21 is a tungsten-chromium hot-work tool and die steel having good red-hardness and resistance to abrasion with relatively good shock resistance. It will withstand high operating temperatures up to 1000 F for long periods of time.
openaire +1 more source
Generalized Viral Illness Caused by an Intermediate Strain of Adenovirus (21/H21 + 35)
Journal of Infectious Diseases, 1980Ten isolates of an antigenically intermediate strain of adenovirus were recovered from eight persons who presented febrile upper respiratory illness, pneumonia, or multisystem disease between November 1976 and August 1978. Six isolates were recovered from four members of an extended family in which the other nine members all had serologic evidence of ...
J C, Hierholzer +2 more
openaire +2 more sources
Transition of Mild Wear to Severe Wear in Oxidative Wear of H21 Steel
Tribology Letters, 2008Under atmospheric conditions at 400 °C, we studied the wear mechanism of H21 steel with different tempering states as a function of normal load. Typical oxidative wear was identified by X-ray diffraction patterns with predominant tribo-oxides of Fe3O4 and Fe2O3.
S. Q. Wang +4 more
openaire +1 more source
A molecular marker associated with the H21 Hessian fly resistance gene in wheat
Molecular Breeding, 1997Near-isogenic lines in conjunction with bulked segregant analysis were used to identify a DNA marker in wheat (Triticum aestivum L.) associated with the H21 gene conferring resistance to biotype L of Hessian fly [Mayetiola destructor (Say)] larvae. Near-isogenic lines were developed by backcross introgression BC3F3:4 (‘Coker 797’ * 4 / ‘Hamlet’) and ...
Y. W. Seo, J. W. Johnson, R. L. Jarret
openaire +1 more source
H21 These Barbies were dermatologists
British Journal of DermatologyAbstract Greta Gerwig’s 2023 Barbie blockbuster provided an infectious reminder that women are capable of the success of their male counterparts, as well as emphasizing the impressiveness of female empowerment and leadership. Luckily, in dermatology, we have had this leadership from the beginning.
openaire +1 more source
Complete genome sequence of a novel virulent phage ST31 infecting Escherichia coli H21
Archives of Virology, 2018More and more virulent phages that are fundamental materials for phage therapy have been isolated, characterized and categorized on GenBank. Phage ST31 infecting Escherichia coli H21 was isolated from wastewater and sequenced using an Illumina Hiseq system.
Honghui, Liu +3 more
openaire +2 more sources
Wear, 1987
Abstract The effects of microstructure on the high temperature wear characteristics of 3Cr2W8V steel, the high temperature wear mechanisms and the features of the worn surface have been investigated by means of a resistance-heating high temperature wear-testing device of our own design. It has been shown that the primary parameters affecting the high
Dao-Yuan Wang, De-Lin Shu, Xin-Cheng Guo
openaire +1 more source
Abstract The effects of microstructure on the high temperature wear characteristics of 3Cr2W8V steel, the high temperature wear mechanisms and the features of the worn surface have been investigated by means of a resistance-heating high temperature wear-testing device of our own design. It has been shown that the primary parameters affecting the high
Dao-Yuan Wang, De-Lin Shu, Xin-Cheng Guo
openaire +1 more source
Cementite Precipitation of a H21 Tool Steel after Hot Compression and Double Temper
Advanced Materials Research, 2014The cementite precipitation behavior in the martensite and banite of the H21 tool steel under high temperature axisymmetric compression test and double temper was investigated. The main purpose on this work is to develop a better understanding regarding the transformation mechanism of bainite and martensite in a H21 tool steel. The selected deformation
Meilinda Nurbanasari +2 more
openaire +1 more source
The Minor Planet Electronic Circulars contain information on unusual minor planets, routine data on comets and natural satellites, and occasional editorial announcements. They are published on behalf of Division F of the International Astronomical Union by the Minor Planet Center, Smithsonian Astrophysical Observatory, Cambridge, MA 02138, U.S.A.
openaire +1 more source
openaire +1 more source
Improvement of Friction and Wear Resistance for Ta or Ta+C Implanted H21 Steel
Chinese Physics Letters, 1997Ta and C ions extracted from a metal vapor vacuum arc ion source were implanted into H21 steel, with an implantation dose of 3 × 1017 cm-2, extraction acceleration 42 kV, and average ion beam flux about 40 μAcm-2. Rutherford backscattering spectrum was used to measure the surface composition after Ta or Ta+C implantation.
Yang Jian-hua +4 more
openaire +1 more source