Said derivatives are those of the general formula: ##SPC1## In which R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are each hydrogen, an alkyl group or an aryl group, one at least of said symbols being other than hydrogen, or R.sub.2 and R.sub.3 form together a group (CH.sub.2).sub.n, n being equal to 3, 4 or 5, and their acid addition salts. They are therapeutically useful, in particular as analgesic drugs.

A target apparatus for automatically indicating the hit point of a projectile comprises a plurality of target elements mounted one behind the other, each element including two electrically insulated parallel sheets of electrically conductive material and included in an electric circuit, the distance between the two conductive sheets being less than the length of a projectile. At least two of the target elements are situated in planes which are inclined one relative to the other, whereby said rel...

A testing device for single-pole voltage testing comprises, between a test electrode (1) and a ground electrode (2), a high impedance dropping resistor (R1) and a measurement resistor (R2) connected in series. The ground electrode (2) is capacitively coupled to earth through the body of the user. The value of the dropping resistor (R1) is at least 10 times greater than the maximum variation which occurs in the capacitively coupled reactance (C1, C2) of the user relative to the ground, so that th...

A food products that can be reconstituted for consumption includes flavoring toppings and/or flavoring inclusions that closely simulate commercially available flavored table syrups and flavored toppings in appearance, flavor, and texture. By applying these flavorings, such as flavored syrups, flavored toppings, and/or flavored inclusions, to chemically leavened food products, yeast leavened food products, and unleavened food products, including waffles, pancakes, corn breads, wafers, pastries, c...

Polluted industrial waste water having a high chemical demand for oxygen and fine particles in suspension is purified using the following steps: directly heating and evaporating the polluted water without subjecting it to the usual prior steps of mechanical separation such as sieving or decanting; separating sludges from the evaporated water; condensing the evaporated water; subjecting the condensed evaporated water to a physico-chemical purifying process of the coagulation-flocculation type; an...

A surgical ring, designed to be implanted around biological organs comprising a pouch or a duct, so as, on the one hand, to form a closed loop between these two extremities (1, 2), thus forming a first (1) and a second (2) extremity and, on the other hand, to reduce the diameter of the opening of the organ when it is tightened by the ring, the ring including a system for reversibly controlling the variation in its diameter. The system also includes a flexible filiform element (4), inserted longi...

Microorganisms, which are capable of growing with pyrazine as the sole carbon, nitrogen and energy source. These microorganisms hydroxylate pyrazine derivatives of general formula: ##STR1## to hydroxylated pyrazine derivatives of general formula: ##STR2## and the latter are accumulated in the growth medium.

An automatic sewer line trap priming assembly including a gap type, anti-siphoning conduit component. A shielded and directed jet at timed intervals directs priming water increments into a receiving funnel which communicates with the trap.

According to the invention a body may be produced in plastic, in particular by means of rotational casting method, by using a suspension or paste with plastic particles, comprising at least partly a thermoplastic elastomer, in particular SEBS, SBS or TPU. Said invention presents the advantage of no danger to health.

A test device is described for testing an electromagnetic quantity, such as a voltage or a magnetic field. The test device includes a housing, a sensor arranged in the housing and sensing the electromagnetic quantity, a processing circuit for processing to signals received from the sensor, display elements for displaying the signals processed by the processing unit, a galvanic element for supplying power to the test device, an illuminator for illuminating an area to be tested, and a switch for a...