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Articles by Ma Lei
Total Records ( 2 ) for Ma Lei
  Lv Chengguo , Ma Lei and Shi Yan
  Relationship between diurnal changes of net photosynthetic rate (Pn) and the impact factors in leaves of Stevia rebaudiana Bertoni were studied. Diurnal changes of Pn and environmental factors (photosynthetic available radiation and temperature and relative humidity) and physiology factors (stomatal conductance and transpiration rate and intercellular CO2) in leaves of Stevia rebaudiana Bertoni chicory were measured using LI-6400 portable photosynthesis system. The relationship between Pn and environmental factors were analyzed by regression analysis and path analysis. The results showed that the curve of diurnal changes of Pn was demonstrated two peaks in clear day and appeared midday depression at noon and the stomatal conductance decreased. All those were due to high photorespiration which was caused by high light intensity and high temperature.
  Ma Lei , Zhang Qi , Jia Qi-Nan , Zhang Jun , Yi Qing-Qing and He Jian-Feng
  Liver diseases such as Hepatitis B has seriously affected humans’ health. According to the previous reports, gene mutation occurs as an essential factor of sustained infection. Technically, the detection of single nucleotide polymorphism loci can help study risk of infection and degree of disease evaluation. However, regular single nucleotide polymorphism selection methods such as Single-strand conformation polymorphism and Denaturing gradient gel electrophoresis are restricted by time consuming, technical difficulty and high costing. In this study, a computing method based on optimal risk and preventive pattern algorithm is applied to analyze the genetic mutation from perspective of SNPs in Hepatitis B virus Deoxyribonucleic acid sequence which illustrates the characteristics of low costing and simplified operation process. Moreover the proposed method may uncover specific unknown single nucleotide polymorphism loci from Hepatitis B virus gene sequence data. The experiment releases 18 potential single nucleotide polymorphisms locus that demonstrate the transition from Acute to Chronic, where five of them have been reported in previous research, the remaining 13 are potential locus. In addition, 3 potential single nucleotide polymorphisms locus that demonstrated the transition to Cirrhosis are discovered. It may provide valuable reference for the clinic prevention and diagnostics.
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