Abstract: A high resolution biosensing system for detecting and identifying a biochemical material to be tested by using proportional relationship between frequency variation of oscillation and mass of the biochemical material to be tested comprises a biosensor; an oscillatorfor generating oscillation based on the sensed result; a phase-lock loop circuit receiving the oscillation of the oscillator and generating pulse signals;an ultra-high frequency counter for counting the pulse signals; and a microprocessor for storing and displaying output from the ultra-high frequency counter and for controlling the oscillator. The phase-lock loop circuit generates the pulse signals of a frequency, which is n times the frequency of the oscillator and with a constant phase difference therebetween to trigger the ultra-high frequency counter. Accordingly, the resolution can be raised up to n times.

Abstract: A high resolution biosensing system for detecting and identifying a biochemical material to be tested by using proportional relationship between frequency variation of oscillation and mass of the biochemical material to be tested comprises a biosensor: all oscillator for generating oscillation based on the sensed result, a phase-lock loop circuit receiving the oscillation of the oscillator and generating pulse signals; an ultra-high frequency counter for counting the Bulb; signals; and a microprocessor for storing and displaying output from the ultra-high frequency counter and for controlling the oscillator. The phase-lock loop circuit generates the pulse signals of a frequency, which is n times the frequency of the oscillator and with a constant phase difference therebetween to trigger the ultra-high frequency counter. Accordingly, the resolution can be raised up to n times.

Abstract: The present invention describes a peptide and analogs thereof which is a fragment of an olfactory receptor protein capable of selectively binding to trimethylamine so that they are useful for detecting trimethylamine. The present invention further describes a method and a device for detecting trimethylamine by using the peptide and the analogs thereof.

Abstract: The present invention describes a peptide and analogues thereof, which is a fragment of an olfactory receptor protein capable of selectively binding to trimethylamine so that they are useful for detecting trimethylamine. The present invention further describes a method and a device for detecting trimethylamine by using the peptide and the analogues thereof.

Abstract: A main structure is intended to engage and disengage an flow-injection type piezoelectric sensor and is composed of a movable stand, a lifting mechanism, and a fixed injection portion. The movable stand is capable of being actuated by a rotary shaft of the lifting mechanism to move upwards or downwards. The movable stand is provided with a retaining slot capable of catching and releasing the flow-injection type piezoelectric sensor. When the movable stand is lifted, a transparent end of the fixed injection portion is in an intimate contact with a planar surface of the flow-injection type piezoelectric sensor which is caught in the retaining slot of the movable stand. A liquid test sample is thus injected into a charge channel of the transparent end such that the liquid test sample flows on the surface of a piezoelectric crystal located in an opening of the planar surface of the flow-injection type piezoelectric sensor for detecting the presence of a target molecule in the test sample.

Abstract: The antigen-binding activity of an antibody immobilized on a siliceous support can be increased by pretreatment of the antibody with acid prior to its immobilization.