Abstract: To provide a collagen/elastin crosslinked material capable of satisfactorily corresponding to various uses such as medical materials including an artificial dermis and scaffolding materials for cell culture. The collagen/elastin crosslinked material is obtained by crosslinking a fish-derived collagen and a fish-derived elastin, and is fully capable of corresponding to various uses such as medical materials including an artificial dermis and scaffold material for cell culture.

Abstract: The pulse signal generating apparatus includes a control circuit, a shift register, a counter and a processor. The control circuit generates a trigger signal to trigger a transition of a signal level. The shift register to which level data to define a signal level is set and in which the level data is serially shifted in response to the trigger signal from the control circuit to generate a pulse signal. The pulse signal is generated based on data shifted out from the shift register. The counter increments a content according to the trigger signal from the control circuit to generate an interruption signal every time the content reaches a predetermined value. The processor sets the level data in the shift register in response to the interruption signal from the counter.

Abstract: An input signal reading circuit includes an up-down counter receiving an input signal and a sampling clock to count up the samplig clock when the input signal is at a high level and to count down the sampling clock when the input signal is at a low level. The up-down counter outputs an underflow signal when a count value of the up-down counter becomes zero. A comparator compares the count value of the up-down counter with a reference value held in a register, to generate a coincidence signal when the count value of the up-down counter becomes coincident with the reference value. A RS flipflop is set by the coincidence signal to bring the read-out signal into a high level, and is reset by the underflow signal to bring the read-out signal into a low level.