Disclosed is a process for preparing polyamide powder having a narrow particle size distribution and a low porosity. The process comprises, (1) dissolving a polyamide having at least 10 C atoms in its monomer in a C1-C3 alcohol under pressure to produce a solution at 130-165.degree.C, (2) cooling the solution without precipitation until nucleation takes place and maintaining the temperature consta...

This invention relates to new benzoxazinedione derivatives of general formula I, and conjugates thereof with active ingredients e.g. antibiotics. The compounds accor ding to the invention constitute heterocyclically protected catechol derivatives and are eff ective as siderophores against gram-negative bacterial strains, particularly against Pseud omonads and strains of E. coli and Salmonella. In ...

Crystalline zeolites are prepared using a small quantity of an organic templating compound and a larger quantity of an amine component containing at least one amine having from one to eight carbon atoms, ammonium hydroxide, or mixtures thereof.

Methods and apparatus for providing asynchronous audio data to a mobile interactive radio are provided. A method for transmitting audio data includes re ceiving identification data from a subscriber and, in response to that identification da ta, transmitting asynchronous audio data to an authorized subscriber via a wireless communications system. The radio includes a receiver for receiving audio d...

The present specification discloses a lock which incorporates a digital programmable microprocessing interface capable of user-programming and whereby a programmed combination opens the lock. According to one embodiment of the lock , here can be as many as approximately 10 x 10 6 possible different combinations w hich may be entered by the user. The operation of the lock is driven by an electric s...

An anchoring biscuit device for joining boards, including a horizontal top element having a generally biscuit-shaped top view configuration, at least one vertical support member attached to the underside of the top element and extending downwardly for a predetermined length to place the top element at a predetermined height for joinder of two adjacent boards which have been pre-cut with biscuit re...

The invention provides an intake air device (10) which comprises a first frame portion (11) having side walls (11a 1 , 11a 2 ) and a heat exchanger (13) arranged between the side walls (11a 1 , 11a 2 ). The device also comprises a second frame portion (12) having therein an air duct (12a) which has air discharge openings (12b 1 , 12b 2 , 12b 3 ...) in the side face thereof. The second frame portio...

The invention provides an intake air device (10) which comprises a first frame portion (11) having side walls (11a 1 , 11a 2 ) and a heat exchanger (13) arranged between the side walls (11a 1 , 11a 2 ). The device also comprises a second frame portion (12) having therein an air duct (12a) which has air discharge openings (12b 1 , 12b 2 , 12b 3 ...) in the side face thereof. The second frame portio...

In a wireless access system which uses the sector antenna of a radio base statio n to transmit an access channel to and receive an access channel from a radio termina l in each frame, and which switches the sector at each frame, the sector ID s is set in a specific functional relation to the access channel ID a, and a radio terminal which commu nicates with a radio base station transmits and recei...

An apparatus producing and applying microwave generated heat to specific target area as for defrosting a frozen ground area into a workable condition and as for decontaminating various substances.

An encoder, which comprises a means 40 for embedding a specific electronic mark data in a characteristic part of an image converted to a spatial frequency area, a quantizing means 50 for quantizing the spatial frequency area data in which the electronic mark data is embedded and a variable length encoder 60 for variable length coding the quantizer output, outputs compression coded digital image da...

The invention relates to a device for removing heat from an electronic component mounted on a circuit board. The device uses a working fluid circulated through cooling elements which are integrated into a metal matrix composite structure. The cooling elements are positioned and arranged within the structure to efficiently manage heat dissipation by evacuating the heat from the component in a multi...

Electronic unit in which a heat conductive mounting comprises two spaced apart holding elements providing a receiving station for a printed circuit board. Edge regions of the board are in heat conductive engagement with the holding elements. Heat is conducted from electronic components on the board into the holding elements and from there into heat pipes connected to the holding elements. A housin...

Anions délocalisés utiles, sous forme de sels M+X-, pour l'obtention de solutions électrolytiques obtenues lorsque ces sels sont ajoutés à un soluté protique ou aprotique.