Abstract: The present invention relates to a method and device for measuring acetone concentrations in breath. Measuring acetone concentrations is based on changes the spectral properties of the fluorophore caused by the chemical interaction of a specific fluorophore with the exhaled air containing acetone which.

Abstract: The present invention relates to a method and device for measuring acetone concentrations in breath. Measuring acetone concentrations is based on changes the spectral properties of the fluorophore caused by the chemical interaction of a specific fluorophore with the exhaled air containing acetone which.

Abstract: The invention provides a method for automatic encrypted marking of liquids and for identifying liquids marked by using this method. For marking certain number of markers is selected and for every marker a random number is generated, which define the amount of a marker used. Based on the number of markers, their measured concentrations and the relation of markers concentrations in the marked liquid, a specific marking code is compiled, characteristic only for this liquid. The marking code is encrypted and delivered to an authorized user. The encrypted marking code is decrypted and for identifying the liquid the original parameters contained in the marking code are compared with parameters actually measured on-site. This identification is carried out automatically in real time without any need for laboratory analyses, thus practically excluding human factor in both the marking and identification processes.

Abstract: The invention provides a method for automatic encrypted marking of liquids and for identifying liquids marked by using this method. For marking certain number of markers is selected and for every marker a random number is generated, which define the amount of a marker used. Based on the number of markers, their measured concentrations and the relation of markers concentrations in the marked liquid, a specific marking code is compiled, characteristic only for this liquid. The marking code is encrypted and delivered to an authorized user. The encrypted marking code is decrypted and for identifying the liquid the original parameters contained in the marking code are compared with parameters actually measured on-site. This identification is carried out automatically in real time without any need for laboratory analyses, thus practically excluding human factor in both the marking and identification processes.

Abstract: A device for non contact detection of low concentration substances outside a laboratory environment is disclosed. A probing laser emission is split into two linear orthogonally polarized emission components and one component is delayed in time relative to the other. Both components are directed to a focal region that is proximate to a target medium thought to contain the substance to be detected. Between the arrival of the first and second emission components, an excitation light pulse at a wavelength corresponding to an absorption line in the spectrum of the substance is directed to the focal region. If vapours of the substance are present, they will be heated by the excitation pulse and will change the index of refraction of the focal region before the second emission component passes through it, thus altering the phase of the back-scattered emission returns. The device delays the first returned component by an equal delay and coherently couples the returned emission components.

Abstract: To detect the presence of a match of a target DNA base sequence with a probe DNA base sequence, a single strand of the probe DNA base sequence is prepared. One end of the single strand probe DNA base sequence is linked to an electrode and the other end to a nano entity capable of exchanging charge with the DNA base sequence. The single strand of the target DNA base sequence is brought into contact with the single strand of the probe DNA base sequence, and the change in the physical properties of the probe DNA base sequence upon hybridization detected.

Abstract: A method is disclosed for establishing communication through free space between a pair of optical communication devices. A divergent beam is transmitted from each of the optical communication devices toward the other. A portion of the received divergent beam is used to create a phase conjugated beam that is returned to the other device. A diffraction grating is dynamically recorded at each devices so as to establish a bi-directional self-tracking optical link between the devices.

Abstract: A method and an apparatus for the treatment of either endo-cavital infections or abnormal surface tissue conditions, particularly destructive bacterial infections, post major invasive surgery abscesses and skin infections such as vitiligo and psoriasis. If required, a catheter system is used, which allows the simultaneous drainage of an infected locus and irradiation of the infected locus with laser-generated pulsed ultraviolet light. The laser light wavelength is chosen so as to require radiation, which is lethal to the microorganisms causing the infection, at the lowest possible dose which will provide ameliorative therapyty. Alternatively, a diode-pumped solid state Raman laser device is used which can be configured to provide in sequence a selected number of output wavelengths in the ultraviolet spectral range.