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Effect of Short-Time Carburizing Treatment on Microstructure and Mechanical Properties of M50 Steel
Yinghua Wei,Xingfu Yu,Shuai Wang,Xiangyang Shen,Wenzeng Zhao,Yong Su,Yu Yang,Xiaochuan Feng 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.6
By using scanning electron microscope (SEM), transmission electron microscope (TEM), X-Ray diffraction (XRD), and hardnessand rotational bending fatigue tests, the effect of short-time carburizing treatment on the microstructure and mechanicalproperties of bearing steel was studied. The results show that when the M50 steel is not carburized, the hardness is 750 HV,the rotational bending fatigue limit is 1100 MPa, and the impact absorption energy is 15.46 J. After short-time carburizationwith the carbon potential of 0.6%, the maximum hardness in the carburized area, the rotational bending fatigue limitand the impact absorption energy are all increased to be 807.7 HV, 1210 MPa and 16.72 J respectively. When the carbonpotential is further enhanced to be 0.8%, the maximum hardness of the carburized area of the steel is further enhanced to be813.4 HV, but the rotational bending fatigue strength and the impact absorption energy are both decreased to be 1125 MPaand 13.65 J respectively, which has close relations with the increasement of undissolved carbides and the precipitation ofacicular carbides.
Minor and major circRNAs in virus and host genomes
Lou Zhihao,Zhou Rui,Su Yinghua,Liu Chun,Wenting Ruan,전체옥,Xiao Han,Chun Lin,BAOLEI JIA 한국미생물학회 2021 The journal of microbiology Vol.59 No.3
As a special type of noncoding RNA, circular RNAs (circRNAs) are prevalent in many organisms. They can serve as sponges for microRNAs and protein scaffolds, or templates for protein translation, making them linked to cellular homeostasis and disease progression. In recent years, circRNAs have been found to be abnormally expressed during the processes of viral infection and pathogenesis, and can help a virus escape the immune response of a host. Thus, they are now considered to play important functions in the invasion and development of viruses. Moreover, the potential application of circRNAs as biomarkers of viral infection or candidates for therapeutic targeting deserves consideration. This review summarizes circRNAs in the transcriptome, including their classification, production, functions, and value as biomarkers. This review paper also describes research progress on circRNAs in viral infection (mainly hepatitis B virus, HIV, and some human herpes viruses) and aims to provide new ideas for antiviral therapies targeting circRNAs.