人脑脊液中的光偏振及荧光特性

本工作对基本正常人的脑脊液和有神经系统疾病的人脑脊液进行了光偏振及荧光物理特性的测量,对脑脊液的荧光5450Å进行荧光平均寿命测量,并在Ar激光4880Å的监控下,测量了荧光5450Å的强度与照射时间的关系,得到了一些有益的提示。除此之外,我们还测量了OH键Raman带在振动频率Δv=3392cm-1的退偏度,退偏度POH=0,计算了吸收振子和被辐射振子之间的夹角,证明了在人的脑脊液分子中的OH键振动是完全对称的振动,其极化强度是各向同性的。

POLARIZING CHARACTERISTICS OF RAMAN SCATTERING AND FLUORESCENCE IN HUMAN CEREBROSPINAL FLUID

The physical characteristics of the light polarization and the fluorescence in human cerebrospinal fluid for the normal and un-normal cranial nerve centre system are shown in this paper. There is a very strong Raman band at Raman shift 3392cm-1 in the spectrum of human cerebrospinal fluid, originating from the vibration of O-H bond, with polarizing rate POH = 0. It is given that the vibration of O-H bond in human cerebrospinal fluid is completely symmetrical, and its polarizint intensity is isotropic.The polarizing rate of the fluorescence in normal and un-normal human cerebrospinal fluid are 0.69 and 0.74, respectively, thus it is proved that the molecule symmetry would be reduced when haman cranial neive centre system is out of order. Included angle10°31''10'''' is estimated from the polarizing rate of the fluorescence measured.We have measured the lifetime of the fluorescence 5450Å in the normal and non normal human cerebrospinal fluid, they are both 8ns.Besides, the relation of the intensity-time of the fluorescence 5450Å are measured at 4880Å radiation for the samples of the normal and un-normal human cerebrospinal fluid. The curves(see Fig.2), will gradually approach a constant with time. We can obtain some good enlightements from those results -human vertebra end radiated by suitable wavelength of laser for curing some diseases of human cranical nerve centre system.