Ethylene glycol is prepared by a process in which ethylene oxide is extracted from an aqueous solution with near-critical or super-critical carbon dioxide. Thereafter an ethylene oxide-carbon dioxide-water mixture is contacted with a catalyst to form ethylene carbonate, which is then hydrolyzed to ethylene glycol in the presence of the same catalyst. The ethylene glycol is separated as product and...

Pied (1) de palette en matière plastique de forme générale creuse et évasée, destiné à etre solidarisé à l'envers d'une plaque, formant la palette proprement dite, caractérisé en ce que la grande base ouverte (5) du pied (1) présente un large rebord (6) horizontal en forme de couronne, dont la surface extérieure est revetue d'une couche (14) de matière adhésive, revetue à son tour d'une feuille pr...

1428184 Polyamides BAYER AG 12 June 1973 [4 Oct 1972] 27852/73 Heading C3R The anionic polymerization of a mixture comprising at least one lactam containing at least 5 ring members, an alkaline catalyst and an activator is effected in the presence of a lactaminsoluble polyalkylene glycol having unmodified end groups and a molecular weight from 20,000 to 35,000. The polyglycol may be a polymer of e...

A mobile storage and transport rectangular roller unit with a roller and drawbar device for use in a shelf storage system. Each unit is provided with four wheels, one adjacent each corner in a four sided frame. The roller bar is provided with pair of rollers and cooperates with a coupling member of substantially cubic shape which is pivotally mounted on the drawbar. Two transverse cross members ar...

A series/parallel/series shift register memory comprises a substrate on which there are provided storage positions for multivalent data elements. There is provided a redundancy generator for generating one or more redundant code elements on the basis of a group of data elements, said redundant code elements being applied to the series input of the shift register memory later than the associated da...

Instrument pour la chirurgie ophtalmologique au laser, comprenant : a) un support, b) des moyensà table X-Y montés sur le support en vue d'un mouvement omnidirectionnel dans un plan généralement horizontal, c) des moyens à lampe collimatrice ou lampe à fente montés sur les moyens à table pour examiner l'oeil d'un patient, d) des moyens producteurs de faisceau de lasers montés sur les moyens à tabl...

4,1 min ,6 min -trichloro-4,1 min ,6 min -trideoxygalactosucrose is prepared by a process including the steps of: (a) isomerising 2,3,4,3 min ,4 min -penta-O-acetyl sucrose to 2,3,6-3 min ,4 min -penta-O-acetyl sucrose; (b) chlorinating the isomerised acetate at the 4,1 min and 6 min -positions; and (c) deacetylating the resulting chlorinated product; the isomerisation step (a) being effected...

Daunomycin analogues of the formula: (I) wherein when each R1 is hydrogen, each R is hydrogen, chlorine, bromine, methyl or methoxy and when each R1 is chlorine, bromine or methyl, each R is hydrogen, are useful in treating various mammalian tumors and are prepared by reacting a daunomycinone derivative of the formula: (II) wherein R and R1 are as defined above with 1-chloro-...

The novel C8 modified oleandomycin compounds and the processes for their preparation are disclosed.

A series/parallel/series shift register memory system having storage positions provided on a substrate. In addition to the single parallel-connected storage registers required to achieve the nominal storage capacity, there are provided groups of first and second nominally redundant single storage registers. The first redundant registers are used as substitutes for faulty single storage registers, ...

Disclosed herein is a novel series of semi-synthetic oleandomycins having an exocyclic methylene or a cyclopropyl group at the C8 position. Processes for preparing the methylene compounds from the natural oleandomycins and the cyclopropyl compounds from the methylene compounds are also disclosed. The above oleandomycin compounds are effective in inhibiting the growth of microorganism, especially...

Un appareil servant à réduire la modulation du bruit de quatification non masqué dans des systèmes de codage numérique différentiel adaptatifs. Dans le codeur numérique, des signaux de basse fréquence sont renforcés en présence de signaux de haute fréquence dominants qui régissent la dimension du pas de quantification. Dans le décodeur, une coupe complémentaire des signaux de basse fréquence est p...

In an element for implantation in body tissue, particularly bone tissue, consisting of a biologically flawless material with a micro-pitted surface, the pores in the surface have a diameter many times smaller than has been previously known in order to permit the occurrence of such a tight and extensive boundary zone around the implanted element that this achieves reinforced and inextricable anchor...

A prod. having a substantial benzene content is prepd. from normal and slightly branched hydrocarbons by (a) contacting the feed, having a boiling range of 40-200 (esp. 60-120) deg. C, with a conversion catalyst (I) which comprises an intermediate pore size zeolite and pt. cpd., the zeolite being free of acidity; and (b) recovering benzene contg. effluent. - Also claimed is a method of upgrading r...

A process and apparatus for laying highly ordered webs wherein a fibrous strand forwarded towards a collecting surface is caused to oscillate up to an amplitude equal to the desired web width and by passing between two closely spaced plates is laid in successive courses with a very high degree of parallelism and precision. A plurality of the laying devices may be used to produce thicker or wider w...

1384014 Boron; silicon; borides; carbides and nitrides of silicon, boron and metals PFIZER Inc 30 May 1972 [17 June 1971 26 Nov 1971] 25333/72 Addition to 1292534 Heading C1A A thin film of substantially defect free, non- oxygen containing refractory material is formed by depositing said material from the vapour phase on to the surface of a film of pyrolytic graphite, which graphite film has been ...

1384014 Boron; silicon; borides; carbides and nitrides of silicon, boron and metals PFIZER Inc 30 May 1972 [17 June 1971 26 Nov 1971] 25333/72 Addition to 1292534 Heading C1A A thin film of substantially defect free, non- oxygen containing refractory material is formed by depositing said material from the vapour phase on to the surface of a film of pyrolytic graphite, which graphite film has been ...

The invention relates to a tight and insulating tank integrated in the supporting structure of a ship, consisting of two successive sealing barriers which alternate with two heat-insulating courses, provision being made for the second insulating course to consist of two layers of heat-insulating elements (4, 14) lying one above the other, of which the first layer lies exactly under the second seal...

A collapsible packaging tube in which the head and tube pipe are separately made at least partially of plastic material and in which a connecting partially plastic body overlaps and is welded to peripheral edges of the head and pipe. The tube pipe and connecting body have isolated metallic barriers. Process for making such a tube is also disclosed.