A process in continuous is described for the preparation of oxides of olefins by the direct epoxidation of an olefin with hydrogen peroxide, or compounds capable of producing hydrogen peroxide under the reaction conditions, in a solvent medium, in the presence of a catalytic system consisting of a zeolite containing titanium and a nitrogenated organic base having formula (I). wherein: R, ...

The invention describes new chiral stationary phases containing a 4-amino-3,5-dinitrobenzoic unit modified with chiral groups and spacer groups. The invention includes the process for the preparation of said stationary phases starting from 4-halogenated derivative of 3,5-dinitrobenzoic acid, chiral selectors obtainable as intermediates in the aforesaid process, and the use of the chiral stationary...

An apparatus for purifying and activating water is provided. The apparatus comprises a drive shaft having a hollow inside, a capsule secured to a lower end of the drive shaft, a device for supporting the drive shaft for rotation so that an upper opening of the drive shaft is positioned above the surface of water and the capsule is positioned in the water, and a motor for rotationally driving the d...

The invention relates to a covering element (1) for beds (2), characterised in that it has a shape substantially conforming to the shape of the bed (2) and in that it provides a plurality of fixing elements (3) to the same beds.

A method of forming a vacuum micro-chamber for encapsulating a microelectronics device in a vacuum processing chamber comprises the steps of forming a microelectronics device (14) on a substrate base (30). The next step is to cover microelectronics device (14) with an organic spacer such as photoresist in a form having a plurality of protrusions, such as a star shape form (36). The next step is to...

The present invention relates to a tubular thermoinsulating device (10; 20; 30), comprising an evacuated envelope made of barrier sheets inside which an inorganic or polymeric, discontinuous or porous filling material (13; 23) is contained. Said envelope comprises an internal tubular element (11; 21; 31) and an external tubular element (12; 22; 32) of higher diameter, which are coaxially arranged ...

Automatic gain control in a hearing aid is effected by detecting an input sound level and/or an output sound level and adapting the output sound level supplied by the hearing aid in response to the detected sound level by controlling the gain of the hearing aid towards an actual desired value of the output sound level. The gain control is effected at increases and decreases, respectively, of the i...

A cylindrical combustion chamber is built in an incinerator main body. An ai r chamber is built inside the combustion chamber, which enables compressed air to be supplied from a blower to the combustion chamber. Air supply pipes linked to the air chamber , orientated towards the center of the incinerator are installed in the combustion chambe r. The area around the air supply pipes forms the cente...

A boot for a gliding sport, consisting of a bootie with a soft upper (1) and of an intermediate rigid sole (4) itself at least partially covered by a flexible walking sole (9), and provided with a transverse metal bar (6) for connection to a binding. The boot further has bearing surfaces on either side of the bar. At least in the foot sole region, the bearing surface is a projection (7) of the int...

Process for reducing the adsorption of hydrosoluble polymers onto rock matrix, which comprises putting the rock matrix in contact with an aqueous solution of polymers containing sacrificial agents, preferably selected from ionic and non-ionic oligomeric surface-active agents. In the preferred embodiment the surface-active agents are non-ionic.

The present invention provides a method for preparing an ester of betulin-3-acetate including alcoholyzing betulin 3,28-dibenzoate; a method for preparing betulin-3-acetate including: (1) acylating betulin to provide betulin 3,28-dibenzoate and (2) alcoholyzing betulin 3,28-dibenzoate to provide betulin-3-acetate; and a process for preparing betulinic acid including: (1) acylating betulin to provi...

A hybrid module comprises a plurality of insulating layers which are laminated on one another and circuit patterns formed on each surface of the insulating layers and/or formed between the insulating layers, wherein the circuit patterns are connected with one another by through hole conductors. Further, the insulating layers are formed of layers each having a transmitting a laser beam, wherein the...

he present invention refers to a method and a machine for production of stirrups of various shapes, in spiral form, from straightened steel rods of arbritary cross section, for production of consequent sides of the desired length, the desired angles and the desired number of frames, which are mainly used in building construction works as reinforcement in beams and columns, as well as in other appl...

load manager switches loads on or off in a power network to protect the loads from being damaged, and it effects loads management and reduction of peak load because priorities have been assigned to the loads. The load management for a network is effective when a significant percentage of loads use the power managers, since the monitor automatically adjusts the demand to improve the quality of elec...

In order to time track an incoming signal, a receiver demodulates a first instance of a signal to produce a first set of energy values corresponding to a set of possible data values of the signal. The receiver also demodulates a second instance of the signal to produce a second set of energy values corresponding to the set of possible data values. The receiver combines the first and the second set...

In a CDMA receiver used in a CDMA cellular mobile telephone system, a searcher which is used to determine reception timing of a plurality of finger processing portions has a controllable search window to enable wide searching range without any expansion of a size. Specifically, the controllable search window is shifted or delayed so that the reception timing lies therein to decrease the number of ...

A direct sequence CDMA receiver is disclosed that includes an interpolative delay profile production unit. An A/D converter receives signals that have been received by an antenna and converted to a baseband signal and samples the signals at twice the chip rate. A matched filter finds correlation values with the received data using a spreading code of 1/-1, and the delay profile production means in...

A path searching apparatus which is used in a base station apparatus according to the CDMA (Code Division Multiple Access) systems for increasing the accuracy for path detection depending on the number of communication channels to be processed. The path searching apparatus has path searching means for generating a delay profile through to a path searching process composed of a plurality of process...

A switch controlling section 204 controls a switching device 205 and a switching device 211 such that mode information, which shows that a current state of an apparatus is an initial synchronous mode, which is a power-on time, or a standby mode, which is a cell moving time, is input, correlation processing is performed by a matched filter 209 in the initial synchronous mode, and correlation proces...