An alkyl-phenylcarbamate derivative of a polysaccharide has in 80 to 100 percent of hydrogen atoms of the amino and hydroxyl groups an alkylphenyl-carbamoyl group having the formula (I): in which (1) at least one of R1 to R5 is a straight alkyl having 4 to 8 or a branched alkyl having 3 to 8 carbon atoms or at least two of R1 to R5 each are a straight alkyl having 1 to 3 when the polysaccha...

An optical waveguide (1) having a detour is disposed at either or both of the light-receiving and light-emitting ends of a dispersion optical system in a spectroscope. Even though light being propagated through the optical waveguide has specified polarizing characteristics, the light is depolarized by passing through the optical waveguide and many times reflecting therein. Accordingly, unpolarized...

In a method and a device for treating a machined surface of a workpiece made of a brittle material, a laser beam generated by a laser oscillator is applied to the machined surface of the workpiece while the workpiece is relatively moved with respect to the laser beam. Additives and impurities exsisting in cracks generated on the machined surface melt due to thermal energy of the laser beam thereby...

The accumulator has an electrode (1) formed with a thin lead foil (2). On both sides layers of plastics material (3) are insulating and acid resistant. These layers carry layers of positive active lead oxide (4) and negative active lead (5). The plastics material layers are formed with circular apertures such that the lead oxide and lead paste contact the lead foil.The holes on the positive side h...

The invention relates to an X-ray apparatus comprising an apparatus part (9, 2) pivoted around a horizontal swivelling axis (3) outside its gravity centre, and a spring arrangement (7) for compensating the torque executed by the apparatus part. The spring arrangement engages on a coupling member (8) which follows an orbit (100) about the swivelling axis on pivoting of the apparatus part. At the sa...

This invention relates to apparatus for assembling battery plates and includes m ould, generally indicated at (10) which defines a pair of ducts (11, 12) which supply respective sets of mould cavities (13, 14) via we irs (15). Each feed duct (11, 12) has a respective pair of feed passages (16, 17) and (18, 19) extending beneath it and is interconnected t o the respective feed passages by generally...

A method for determining the direction of a borehole during drilling comprises determination of inclination angle .theta. and highside angle .PHI. from gravity acceleration (?) measurements and determination of azimuth angle ? from magnetic field (B) measurements, the determinations being carried out in conventional XYZ-and-NEV coordinate systems coupled by Euler-angle coordinate transformations. ...

Heat-sealable films formed of a polybutylene terephthalate resin composition including between 50 and 95% by weight of a polybutylene terephthalate base resin having an intrinsic viscosity of 0.7 or greater, and between 5 and 50% by weight of a polycarbonate resin having an intrinsic viscosity of 0.4 or greater melt blended with the polybutylene terephthalate base resin.

A pneumatic tire comprises a carcass ply (1), two vulcanized rubber composition layers (3) arranged radially inside the carcass ply, and a continuous layer of a sealing material (2) arranged between the two vulcanized rubber composition layers. The sealing material has a viscosity of not more than 6 x 10<4> poises at 60 DEG C. Bonding portions (1) are formed through the continuous layer, and disco...

A non-contact row crop sensor comprises one or more transmitter/receptor pairs (24, 26; 34, 36) mounted on two row separators (10, 12) of a harvesting machine. Each transmitter (24, 26) transmits an energy beam (40, 42) to one of the receptors (34, 36) and the energy beams (40, 42) cross at a point which defines a position of the harvesting machine relative to a row of crop stalks (18). A circuit...

A method for recycling PET beverage bottles comprises the removal of the contaminants with the use of supercritical carbon dioxide.

This invention describes a practice for the hot-pressing and/or hot working of rare earth element-containing alloy powders (52) using open-to-the-air presses (10;100). The rare earth-containing powder (52) is pressed into a compact body (34) at ambient temperatures using a solid lubricant only on the die wall. This compact body (34) is then hot-pressed in an open-air press (100) utilizing a heated...

The monitoring arrangement contains sections (PUW,SUW) for the different types of monitoring associated with working and program memories. A memory section (SRG) contains messages displayed as a result of fault detection by the monitoring functions. It contains a common timer (TW) for all sections and common functional units (AR,SL,BT) for internal data transfer between them over a bus system (DB...

In a method and an apparatus for the manufacture of reinforced ply fabric material (11, 12) for use in construction of a pneumatic tyre one or more elongate strips (11, 12) of flexible reinforced polymeric tape are wound helically around a mandrel means (36) with successive turns in contact to form a tubular structure much wider than the width of the tape (11, 12). The tubular structure is then cu...

In a process for the production of mouldings from flexible PUR structural (integral) foam by foam moulding by means of polyaddition of a polyol with an isocynate in the presence of water, a closed, tough outer layer on the mouldings is formed by introducing 40 to 60% by volume of air, from 0.05 to 2.5% by weight of water and 0.25 to 2.0% by weight of one of the C1- to C6-hydrocarbons into the poly...

A curing mould for the prodn. of tyres has axially moving top and bottom mould rings to enter a hot press, and profiled mould segments for the rings moving axially with them. The segments can be moved radially independently of the axial movements of the rings.

This invention relates to the use of a C2-6 polyfluorocarbon compound containing no chlorine or bromine atoms as physical blowing agent in the preparation of rigid, closed-cell, polymer foams. Use of such blowing agents, especially 1,1,1,2-tetrafluoroethane (R-134a), in the preparation of polyurethane or polyisocyanurate foams provided for products in which the loss in thermal insulation performan...

Stress cracking in poly(alkylene terephthalate) articles of manufacture is inhibited by applying to the article a stress crack inhibitor which contains an amine having at least 6 carbon atoms. In a preferred embodiment, the stress crack inhibitor is applied to the article in the form of an aqueous fatty acid-based lubricant.

An olefin polymerization catalyst component subjected to successive preliminary polymerization treatment using each of a straight chain alpha-olefin having 2 to 5 carbon atoms and 3-methyl-1-butene; an olefin polymerization catalyst using the olefin polymerization catalyst component; a process for polymerizing olefin(s) which comprises polymerizing or copolymerizing olefin(s) in the presence of th...