Tasaki I, Nakaye T
Biophys J. 1986 Aug;50(2):285-93. doi: 10.1016/S0006-3495(86)83462-2.
By using a pyroelectric detector constructed with a polyvinylidene fluoride film, a rapid rise in the temperature of the dark-adapted bullfrog retina induced by light was demonstrated. In the bullfrog retina, as in the squid retina examined previously, the heat generated in response to a brief light pulse was found to be far greater than the amount produced by conversion of the entire radiant energy of the stimulus into heat. The thermal responses consist of the heat generated by the photoreceptor and the postsynaptic elements in the retina, preceded by a small signal reflecting conversion of a portion of the radiant energy of the stimulus into heat. The dependence of the thermal responses on the light intensity, on the wavelength and on a variety of physical and chemical agents was examined. The exothermic process underlying the production of heat by the photoreceptor was found to precede the electrophysiological response of the retina.
通过使用由聚偏二氟乙烯薄膜构成的热释电探测器，证明了光可使暗适应的牛蛙视网膜温度迅速升高。与之前检测的鱿鱼视网膜一样，在牛蛙视网膜中，发现对短暂光脉冲产生的热量远大于刺激的全部辐射能转化为热量所产生的量。热反应由视网膜中光感受器和突触后元件产生的热量组成，在此之前有一个小信号，反映刺激的一部分辐射能转化为热量。研究了热反应对光强度、波长以及各种物理和化学试剂的依赖性。发现光感受器产生热量的放热过程先于视网膜的电生理反应。
