A method for determining the enzymatic activity of monoamine oxidase contained in an organism sample by reacting enzymatically a benzylaminoazo derivative or its acid addition salt with the organism sample, separating the resulting benzaldehydeazo derivative from the reaction mixture and determining an optical absorbance of the benzaldehydeazo derivative at a wave length within the visible region of the absorption spectrum.

A brain wave signal monitor with a warning device actuated by failure of the signals to be present at a preselected minimal level for a specific period of time. The warning device is actuated by a circuit that remains locked in the actuating condition until reset by an attendant. A delay circuit controls the minimum rate by preventing actuation of the warning device until a predetermined time has elapsed since the last brain wave signal. A circuit tuned to the local power line frequency receives...

Esters of 7-trifluoromethylmercaptoacetamido-3-(1-methyltetrazol-5-ylthiomethyl)-3-c ephem-4-carboxylic acid are prepared. These compounds are antibacterial agents.

A radioimmunoassay method for the in vitro determination of the renin activity of an unknown plasma sample. In this method an unknown generation sample is provided by mixing the unknown plasma sample with a generation buffer solution and an inhibitor for enzymes which convert angiotensin I to other substances. The unknown generation sample is incubated to generate angiotensin I therein by action of renin upon angiotensinogen, thereby producing a generated unknown sample. A generated unknown radi...

Device for monitoring activity of gases in nuclear engineering installations, especially for metrologically registering iodine contained in exhaust air, includes gas-withdrawing lines, and a common measuring and evaluating station to which the gas-withdrawing lines are connected, the gas-withdrawing lines being formed of polytetrafluorethylene and being surrounded by a grounded metal jacket.

A contactless activity and respiration monitor is described which includes a resilient, capacitive pad, which may be a mattress, or a pad used with a mattress, having a capacitor therein responsive to the activity or respiration of a body lying on it. Electronic capacitance sensing circuitry is disclosed which provides an indication or alarm in the event of excessive activity or apnea, or low or high respiration rate. Readouts of respiration rate, and number of events of activity may also be pro...

The compounds are cyanoguanidines, for example N-cyano-N'-methyl-N"-[2-((3-hydroxy-2-pyridyl)methylthio)ethyl]-guanidine, which are inhibitors of histamine activity.

A method of inhibiting histamine activity by administering S-(heterocyclic-alkyl) isothioureas.

The physical activity of biological specimens in an environmental medium is monitored by setting up a standing pattern of ultrasonic acoustic waves in the environmental medium. As the biological specimens move about in the environment, they disturb the standing wave pattern. These distrubances are monitored to produce output indications of the degree of biological activity. The quality of an environmental medium is indicated by monitoring the activity of biological specimens in a controlled samp...

This application discloses a method of analyzing bioelectric outputs of living things by sensing, amplifying and comparing such outputs with selected predetermined values and providing indications of each occurrence of the departure of a discrete value of such outputs from such predetermined values.