Mechanism for generating interstitial atoms by thermal stress during silicon crystal growth
Publication date: Available online 8 February 2019Source: Progress in Crystal Growth and Characterization of MaterialsAuthor(s): Takao Abe, Toru Takahashi, Koun ShiraiAbstractIt has been known that, in growing silicon from melts, vacancies (Vs) predominantly exist in crystals obtained by high-rate growth, while interstitial atoms (Is) predominantly exist in crystals obtained by low-rate growth. To reveal the cause, the temperature distributions in growing crystal surfaces were measured. From this result, it was presumed that the high-rate growth causes a small temperature gradient between the growth interface and the interior of the crystal; in contrast, the low-rate growth causes a large temperature gradient between the growth interface and the interior of the crystal. However, this presumption is opposite to the commonly-accepted notion in melt growth. In order to experimentally demonstrate that the low-rate growth increases the temperature gradient and consequently generates Is, crystals were filled with vacancies by the high-rate growth, and then the pulling was stopped as the extreme condition of the low-rate growth. Nevertheless, the crystals continued to grow spontaneously after the pulling was stopped. Hence, simultaneously with the pulling-stop, the temperature of the melts was increased to melt the spontaneously grown portions, so that the diameters were restored to sizes at the moment of pulling-stop. Then, the crystals were cooled as the cooling time elapsed, and ...
This report continues the development of ALIs as a clinical tool in wildlife while systematically testing one possible method for determining an optimal ALI for a particular species. PMID: 32228119 [PubMed - as supplied by publisher]
Authors: Park J, Kim J, Chen Y, Song HC, Chen Y, Zheng M, Surh YJ, Kim UH, Park JW, Joe Y, Chung HT Abstract Oxidative stress is recognised as a key factor that can lead to cellular senescence and aging. Carbon monoxide (CO) is produced by haemoxygenase-1 (HO-1), which exerts cytoprotective effects in aging-related diseases, whereas the effect of CO on cellular senescence and aging has not been elucidated. In the current study, we clearly demonstrated that CO delays the process of cellular senescence and aging through regulation of miR-34a and Sirt1 expression. CO reduced H2O2-induced premature senescence in human ...
Publication date: Available online 1 April 2020Source: Journal of Microbiological MethodsAuthor(s): Wisnu Tafroji, Felicia Monica Bernadette, Ernawati A. Giri Rachman, Dodi Safari
Publication date: Available online 2 April 2020Source: Journal of Microbiology, Immunology and InfectionAuthor(s): Chun-Min Kang, Xiang-Jun Chen, Ching-Chin Chih, Chen-Ching Hsu, Ping-Hung Chen, Tai fen Lee, Lee-Jene Teng, Po-Ren Hsueh
Publication date: Available online 1 April 2020Source: Journal of Microbiology, Immunology and InfectionAuthor(s): Chien-Yu Lee, Pi-Sheng Wang, Yuan-Der Huang, Yung-Ching Lin, Yung-Nien Hsu, Shih-Chung Chen
Publication date: Available online 1 April 2020Source: Journal of Microbiology, Immunology and InfectionAuthor(s): Chia-Hung Liao, Shih-Chang Hung, Yuan-Ti Lee, Hung-Chang Hung, Po-Ren Hsueh
Publication date: Available online 2 April 2020Source: Statistics &Probability LettersAuthor(s): Junhao Guo, Jie Zhou, Sanfeng Hu
Publication date: Available online 1 April 2020Source: Statistics &Probability LettersAuthor(s): S. Mousavinasr, C.R. Gonçalves, C.C.Y. Dorea
Publication date: 1 May 2020Source: Sensors and Actuators A: Physical, Volume 306Author(s): Chuang Ge, Leixiang Bian, Jiayang Li, Mingyou Zhong, Songtong Han, Yunfei Jia
Publication date: Available online 1 April 2020Source: Results in PhysicsAuthor(s): U.S. Okorie, A.N. Ikot, E.O. Chukwuocha, G.J. Rampho
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