激光辐照血液疗法和激光磁化血液疗法

简要回顾光辐照血液疗法的发展和类型以及激光磁化血液疗法的兴起。概述光、激光和磁场对血液的生物效应,初步探讨激光磁化血液疗法可能的作用机制。最后进行了多种光辐照血液疗法的初步对比。     

Meristems under Continuous Irradiation

Root tips of Vicia faba and Zea mays have been subjected tocontinuous irradiation from radium or cobalt-60 for long periodsat various dose rates. The rates of mitosis and the damage tothe chromosomes (assessed as percentages of cells with micronulei)have been measured in four regions of the meristems. In Zearates of mitosis are reduced under chronic irradiation, exceptin the quiescent centre, and the cap initials are particularlysensitive. In Vicia the main change in mitosis is that the quiescentcentre increases its rate, but at 12°C there is a slightstimulation of division all over the meristem. In Vicia increasingthe dose rate or lowering the temperature increases the nucleardamage. At 19° C there is an increase in damage with accumulateddose percell cycle, but the data at 12°C do not fall onthe 19°C curve, suggesting that there may be a temperatureeffect on damage other than that caused by changing the durationof the cell cycle. The differences in radiosensitivity betweenthe different regions of the meristem are due solely to differencesin the rates of mitosis of the cells.