This invention relates to a new synthetic process for the manufacture of zidovudine from the starting material D-xylose involving: i) Conversion of D-xylose to a 1-( beta -D-xylofuranosyl)thymine derivative; ii) 2 min -Deoxygenation of the thymine derivative; and iii) 3 min -Azidation of the 2 min -deoxy compound. r

This invention relates to a new synthetic process for the manufacture of zidovudine from the starting material D-xylose involving: i) Conversion of D-xylose to a 1-( beta -D-xylofuranosyl)thymine derivative; ii) 2 min -Deoxygenation of the thymine derivative; and iii) 3 min -Azidation of the 2 min -deoxy compound. r

A device for cleansing the colon includes an elastic housing with an oval-shaped end and provided with an aspiration channel and a discharge channel isolated from each other, each channel having its own outlet port in the end of the housing. An endoscope is built into the aspiration channel and is provided with a transparent balloon on its working portion, while the discharge channel accommodates ...

A device for cleansing the colon includes an elastic housing with an oval-shaped end and provided with an aspiration channel and a discharge channel isolated from each other, each channel having its own outlet port in the end of the housing. An endoscope is built into the aspiration channel and is provided with a transparent balloon on its working portion, while the discharge channel accommodates ...

An element for adsorbing one or more active gases in an inert gas to obtain an inert gas such as air containing an inert gas such as air containing an ultra-low concentration active gas such as water vapor. The element is produced by laminating low density papers composed of inorganic fiber to form a matrix in the form of a gas adsorbing element having numerous small channels penetrating through o...

An element for adsorbing one or more active gases in an inert gas to obtain an inert gas such as air containing an inert gas such as air containing an ultra-low concentration active gas such as water vapor. The element is produced by laminating low density papers composed of inorganic fiber to form a matrix in the form of a gas adsorbing element having numerous small channels penetrating through o...

The invention relates to a pin (21) for connecting an electrical conductor (2) to a PCB (4). The pin has a first part (24) thrust into a hole in the PCB and a second part (26), to which the electrical conductor (2) is connected by a sliding contact (8). The cross-sectional dimension (d2) of the second part (26) is greater than the cross-sectional dimension (d1) of the first part (24), and between ...

The invention relates to a method, a transmitter and a receiver for the transmission of digital auxiliary information (d2(t)) above a frequency band used by a main signal (d1(t)). According to the invention a spectrum portion which can be added directly above the spectrum of the main signal is selected by band pass filtering (3) amongst spectrum portions falling between the zero points of the gene...

The hot water boiler has a number of electrical elements which may be connected by a thermostat-controlled regulator unit to the electrical mains and this dependent upon the temp. monitored by a thermostat. One or more changeover switche break the feed of current tothe boiler elements after commencement of feed to them via the load regulator equipment, and during a period of time determined by a t...

The present invention relates to a process for facilitating the scaling of a hexagonal nut or the like by a rotary nut socket, those limit sides 3-5 of the nut socket which surround the nut-receiving opening in the socket 1 being symmetrically broken in the outward direction at an angle a within the range 10 degree -25 degree, preferably within the range 15 degree -20 degree. The invention also re...

Disclosed are alkyl amine-anionic surfactant ion-pair/wax composites useful as fiber- and fabric-conditioning agents. Also disclosed are compositions containing these conditions agents such as fabric detergent compositions, shampoos, hair conditioners and dryer- and washer-added fabric conditioners.

Disclosed are alkyl amine-anionic surfactant ion-pair/wax composites useful as fiber- and fabric-conditioning agents. Also disclosed are compositions containing these conditions agents such as fabric detergent compositions, shampoos, hair conditioners and dryer- and washer-added fabric conditioners.