The invention provide a process for producing vitamin A aldehyde in high yield by oxidizing vitamin A with a aldehyde of the general formula (1) wherein R1, R5 and R3 are the same or different and respectively represents a lower alkyl group or a lower alkenyl group in the presence of an aluminum alkoxide or aluminum phenoxide in a catalytic amount.

A novel fluorinated copolymer is prepared by copolymerization of a fluorinated olefin with a novel sulfur containing fluorinated vinyl ether of the formula: wherein k is 0 or 1 and l is an integer of 3 to 5, which is prepared from starting materials which are also novel. Said copolymer is useful for preparation of a fluorinated cation exchange membrane having carboxylic acid groups and...

A radio-frequency transformer is described which can be installed automatically in printed circuit boards by means of wave soldering.

The wound annular core includes at least one winding arranged on a holder made from synthetic material. The holder has connection pins (8). The holder consists of a dome (2, 3, 4) arranged on a base (5). The dome is divided into three segments separated from each other by projections (5), over which the annular core is pushed before winding. In one embodiment, the dome segments are broader at thei...

The commence layer material (8) is fed to a stamp (10,11) for dividing the cover layer (7) and the hard-magnetic metal strip (5) into pieces of equal length. A bearer foil (16) is formed with corrugations and is so adhered to the commencement layer material (8') taken from the stamp (10,11) that the corrugation peaks (26) locate over the cuts (14) produced by the stamp and the corrugation valleys ...

Blends of PTFE and perfluorinated ether copolymers of TFE and perfluoro(propyl vinyl ether) provide coating compositions which have reduced crystallinity and useful lives superior to what would be expected from averaging the properties of the unblended resins themselves.

A method for suspending the urethrovesical junction in females comprises inserting sutures (44) through a puncture or incision in the suprapubic abdominal area or through a puncture or incision in the vaginal wall, suspending the urethrovesical junction with the sutures, and anchoring the sutures with an anchoring means (38) at an anchoring site. The anchoring means is a relatively rigid helix hav...

PURPOSE:To generate the kind of a wave form in a state changed over in a real time, by respectively converting two logical data to a plurality of data different in a phase at every one time slot and controlling said data on the basis of a clock signal by first and second logical circuits to multiply the same. CONSTITUTION:The input logical data LD of a terminal 11 is divided into data D1, D2 shift...

The distributed auditing subsystem invention runs in a UNIX-like operating system environment with a hierarchical file system. The invention provides an audit trail of accesses to the objects it protects and maintains and protects that audit trail from modification or unauthorized access or destruction. The audit data generated by the invention is protected so that read access to it is limited to ...

Device in a previously known powder inhalator intended for inhalation of an air flow which contains pharmacologically active compound in micronized form. The powder inhalator comprises a nozzle unit (2) with a nozzle aperture (2a) as well as a container unit (3) with a releasing or dosing unit (6) for delivering the active compound. The air flow generated by inhalation is at least partly aspirated...

A cable clamp for use in apparatus connected to flexible electrical cables such as a plug, is formed as a single injection moulding comprising two co-operative, symmetrically opposed, rotatable, toothed jaws A surmounting integrally formed arcs of gear teeth G, each such arc being enmeshed with the other to produce equal and opposite movement of the jaws against an integrally made, deformable, hor...

A magnetic head slider unit has a slider 1 which is mounted so as to be movable relative to a magnetic medium such as a magnetic disk 100. Contact between the slider and the disk is to be avoided to prevent damage to the disk and therefore the slider is shaped so as to generate an air pressure higher than ambient pressure between itself and the disk. A magnetic head 6 for reading and/or writing da...

A water soluble particulate binder composition comprises a spray dried mixture of an alkaline resole phenol-aldehyde resin and a silane. The spray dried mixture may be readily dissolved in water and used as a binder for making foundry sand moulds or cores.

MEMBRANA DE FILTRACION QUE COMPORTA UNA ESTRUCTURA POROSA EN UN MATERIAL ELEGIDO ENTRE CERAMICA COCIDA, METALES COCIDOS, CARBONO MICROPOROSO, VIDRIO MICROPOROSO. SE CARACTERIZA PORQUE EL CONJUNTO DE LA SUPERFICIE EXTERIOR ASI COMO LA SUPERFICIE INTERIOR DE LOS POROS DE DICHA ESTRUCTURA ESTA RECUBIERTA DE UNA PELICULA Y FINA Y CONTINUA DE CARBONO O DE UN OXIDO.; Filter membrane comprising a porous ...

LAS DISOLUCIONES QUE CONTIENEN DESECHOS DE PESTICIDAS DE LOS INVERNADEROS, POR EJEMPLO, SE DESCONTAMINAN MEDIANTE UN SISTEMA QUE CONTIENE UN REACTOR DE LA CAPA DEL TERRENO. EL AGUA DESECHADA DEL INVERNADERO VA A UN TANQUE DE MUESTRAS DEL CUAL SE RETIRAN LAS MUESTRAS PARA REALIZAR ENSAYOS SOBRE SU TOXICIDAD. EL AGUA DEL TANQUE DE MUESTRAS VA A UN TANQUE DE RETENCION, O A UN SUBSISTEMA DE CORRIENTE ...

SE DESCRIBE UN SISTEMA DE ACUSTICA PASIVA PARA CONTROLAR EL FUNCIONAMIENTO DE UN SOPORTE FLUIDIFICADO EN UN SISTEMA DE SOPORTE FLUIDIFICADO. EL SISTEMA DE ACUSTICA PASIVA UTILIZA UNA TECNOLOGIA DE ANALISIS VIBRATORIO QUE TRADUCE LA ENERGIA ACUSTICA/VIBRATORIA CREADA POR LOS PROCESOS INDUSTRIALES EN INFORMACION UTIL Y RELACIONADA CON EL PROCESO. ESTE INVENTO HACE POSIBLE QUE UN SISTEMA EXPERTO NO A...

UN REGULADOR DE FLUJO 28 PARA UTILIZACION EN UN SISTEMA IMPLANTABLE DE ENTREGA DE FARMACOS, COMPRENDIENDO DICHO REGULADOR UN CUERPO 40, 42 QUE TIENE UN CAVIDAD INTERNA DIVIDIDA POR UN DIAFRAGMA MOVIL 44 PARA DEFINIR UN SECCION INFERIOR Y UNA SECCION SUPERIOR 48 UNA ENTRADA 50 PARA RECIBIR FLUIDO DE UN DISPOSITIVO DE ENTREGA DE FARMACOS 10, ACCIONADO POR PRESION, EN DICHO SISTEMA Y EN COMUNICACION ...

UN ASIENTO DE ESPUMA DE DUREZA MULTIPLE PROVISTO DE RODILLOS LATERALES QUE COMPRENDE UNA O MAS ZONAS DE UNA SEGUNDA ESPUMA DE POLIURETANO ENCAPSULADA EN UNA PRIMERA ESPUMA DE POLIURETANO SE PREPARA AL DISPONER EL MOLDE DEL ASIENTO (10), DE FORMA QUE EL FONDO DEL RODILLO LATERAL (12) SE INCLINE EN DIRECCION PARALELA A SU LONGITUD, INTRODUCIENDO UNA FORMULA DE LA PRIMERA ESPUMA LIQUIDA EN EL FONDO D...

A light illumination membrane switch having a configuration with a reduced size, capable of realizing an effective light illumination of the keys and a highly reliable operation even under the high humidity environment. The switch has a light source section (100) using an LED bare chip element (26) for emitting lights to illuminate the key section (30, 31) which is directly mounted on the electrod...

For an electromotive scooter which gets its driving force from an electric motor driven by batteries mounted thereon, and which has a power source unit for an electromotive scooter which supplies power of nominal value of 48V to the electric motor that requires high voltage to exert high driving performance and also supplies power of nominal value of 12V via an auxiliary power source to the other ...