The total dose effect of an AD678 with a BiMOS process is studied.We investigate the performance degradation of the device in different bias states and at several dose rates.The results show that an AD678 can endure 3...The total dose effect of an AD678 with a BiMOS process is studied.We investigate the performance degradation of the device in different bias states and at several dose rates.The results show that an AD678 can endure 3 krad（Si） at low dose rate and 5 krad（Si） at a high dose rate for static bias.The sensitive parameters to the bias states also differ distinctly.We find that the degradation is more serious on static bias.The underlying mechanisms are discussed in detail.展开更多
Objective: To develop a simple and efficient method for detecting small populations of mitochondrial DNA deletion. Methods: Peripheral blood cell DNA was obtained from a victim who was accidently exposed to a 60Co rad...Objective: To develop a simple and efficient method for detecting small populations of mitochondrial DNA deletion. Methods: Peripheral blood cell DNA was obtained from a victim who was accidently exposed to a 60Co radiation source 11 years ago. Using the DNA as template, PCR was performed to generate multiple products including true deletions and artifacts. The full length product was recovered and used as template of secondary PCR. The suspicious deletion product of mtDNA could be confirmed if it was only yielded by first PCR. Using either original primers or their nested primers, the suspicious deletion product was amplified and authenticated as true deletion product. The template was recovered and determined to be a deletion by sequencing directly. Results: A new mtDNA deletion, spanning 889 bp from nt11688 to nt12576, was detected in the peripheral blood cells of the victim. Conclusion: The new PCR-based method is more efficient in detecting small populations of mtDNA deletion than other routine methods. MtDNA deletion is found in the victim, suggesting there is relationship between the deletion and phenotypes of the disease.展开更多
文摘The total dose effect of an AD678 with a BiMOS process is studied.We investigate the performance degradation of the device in different bias states and at several dose rates.The results show that an AD678 can endure 3 krad（Si） at low dose rate and 5 krad（Si） at a high dose rate for static bias.The sensitive parameters to the bias states also differ distinctly.We find that the degradation is more serious on static bias.The underlying mechanisms are discussed in detail.
基金Supported by the National Natural Science Foundation of China(No.30171030)
文摘Objective: To develop a simple and efficient method for detecting small populations of mitochondrial DNA deletion. Methods: Peripheral blood cell DNA was obtained from a victim who was accidently exposed to a 60Co radiation source 11 years ago. Using the DNA as template, PCR was performed to generate multiple products including true deletions and artifacts. The full length product was recovered and used as template of secondary PCR. The suspicious deletion product of mtDNA could be confirmed if it was only yielded by first PCR. Using either original primers or their nested primers, the suspicious deletion product was amplified and authenticated as true deletion product. The template was recovered and determined to be a deletion by sequencing directly. Results: A new mtDNA deletion, spanning 889 bp from nt11688 to nt12576, was detected in the peripheral blood cells of the victim. Conclusion: The new PCR-based method is more efficient in detecting small populations of mtDNA deletion than other routine methods. MtDNA deletion is found in the victim, suggesting there is relationship between the deletion and phenotypes of the disease.
