Current anatomical theory does not recognize the existence of an extended floating
threadlike structure inside the blood vessels. Nonetheless, this study developed a new method for observing such an intravascular threadlike structure. The key technique involves injecting acridineorange into the femoral vein to circulate along the blood vessels and stain the nuclei of the intravascular threads inside the blood vessels. In-situ observations were then made under a fluorescence stereomicroscope after saline-perfusion. Confocal microscope images revealed a
distinctive characteristic pattern of nucleus distribution that was clearly distinguishable from fibrin, capillaries, small venules, arterioles, or lymph vessels. Accordingly, it is suggested that the identified intravascular threads are part of the Bonghan's circulatory network that is distributed throughout the body, including inside the blood vessels.
A high-performance lateral p-n photodiode in LPCVD polysilicon has been successfully fabricated and characterized. The device is shown to have a response time of 30 ps, i.e. a 3 dB cut-off frequency of 5.3 GHz, which we believe is the fastest speed reported in polysilicon. The measured device speed is analysed quantitatively on the basis of the recombination-dominated-response model. In so doing, an analytic expression for the impulse response function of such devices is given here for the first time. The general features of the device and its possible applications in optoelectronic integrated circuits are also discussed.
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