Abstract: A battery charger amusement has a receptacle adapted to receive a rechargeable battery, an electronic circuit monitoring battery charge status, and a mechanical movement signal activated upon charge status attainment. The battery charger can include a motion actuator so as to move during the battery recharge process. The device is intended to encourage the use of rechargeable batteries over a disposable counterpart.

Abstract: An ultraviolet light emitting diode flashlight is contained within a housing having a pen tip extending from the housing and an ink or dye reservoir in fluid communication with the pen tip. The ultraviolet light emitting diode flashlight within the housing emits light capable of inducing fluorescence in the ink or dye. A switch assembly completes an electrical circuit between a light emitting diode and a battery to activate the flashlight. A writing system package includes at least two of: a neon or pastel colored writing surface, a security pen having an ink or dye that fluoresces in the visible portion of the light spectrum upon exposure to ultraviolet light, and an ultraviolet light emitting diode flashlight.

Abstract: An optical monomode guided-wave device, especially an electroabsorption modulator, having an active region with a mode size small compared with that of an optical fibre is integrated with at least one passive spot size adjuster which has an optical core that tapers simultaneously from a width and height substantially equal to those of the active region adjacent to that region to a width large compared with the width of the active region and a thickness substantially smaller than the thickness of the active region at a position remote from that region. Usually—unless the device includes its own light source—there will be two spot size adjusters, respectively at the inlet and outlet of the device.

Abstract: A test kit for the identification of various bacterial species groupings comprises a DNA probe which can identify palindromic units specific to particular bacterial species or species groupings. Such probes are highly specific for particular species or species subgroups. Accordingly, specific identification of bacteria may be achieved.

Abstract: A test kit for the identification of various bacterial species groupings comprises a DNA probe which can identify palindromic units specific to particular bacterial species or species groupings. Such probes are highly specific for particular species or species subgroups. Accordingly, specific identification of bacteria may be achieved.

Abstract: A test kit for the identification of various bacterial species groupings comprises a DNA probe which can identify palindromic units specific to particular bacterial species or species groupings. Such probes are highly specific for particular species or species subgroups. Accordingly, specific identification of bacteria may be achieved.

Abstract: A method for the detection of the mutagen effect of a substance or composition by producing culture of a micro-organism harboring a recombinant of a sfi gene and of a gene coding for a dosable enzyme in the presence of said substance or composition and measuring the activity of the dosable enzyme induced under the control of the sfi gene. When the latter is activated due to the mutagen character of said substance or composition, measuring the activity of a distinct enzyme synthesized by the microorganism and coded by a gene not involved in the activation process of the sfi gene and measuring the variation of the ratio of the activity of the abovesaid dosable enzyme to the activity of said distinct enzyme. Then comparing the variation that of the ratio of the activities of the same enzyme in a culture of the same microorganism, but in the absence of the mutagen substance.