Disclosed is an improved process for the preparation of squaraine compositions which comprises reacting squaric acid, an aromatic amine, and a composition selected from the group consisting of phenols and phenol squaraines, in the presence of an aliphatic alcohol, and an optional azeotropic substance.

PCT No. PCT/FI81/00075 Sec. 371 Date May 25, 1982 Sec. 102(e) Date May 25, 1982 PCT Filed Oct. 9, 1981 PCT Pub. No. WO82/01300 PCT Pub. Date Apr. 29, 1982.A method and apparatus prevents piglets from being suffocated under a sow by detecting when the sow stands up and establishing an unpleasant condition, specifically blowing air under the sow to discourage the piglets from moving under the sow. A...

Radiation-sensitive elements, e.g. printing plates, comprising a substrate having coated thereon a photosolubilisable composition comprising an alkali-soluble phenolic resin and an onium salt. The onium salt imparts a solvent resistance to the phenolic resin which is removed upon exposure to radiation thereby providing a solubility differential between exposed and unexposed areas of the compositio...

A mechanism for continually testing a first processor element in a suitable multiprocessor system in which at least first and second processor elements are connected to a common input bus to concurrently receive the same opcodes and operands. Both processors decode the opcodes; when an opcode indicates an operation to be performed by the second processor, the first processor responds by executing ...

A sealed gas recombining lead-acid cell with absorbed electrolyte is produced by assembling unformed plates and high porosity glass mat separator whose surface area is from 0.2-1.7 m2/g, adding a limited quantity of acid into the cell, and then either prior to or after sealing of the cell electrochemically forming the plates of the cell in situ. High rate performance of the cell is significantly i...

Electrical connectors (10) (see Figure 1) are provided with housings (28) having complementary coupling formations (25, 31) comprising drawbars having respectively a headed pin (32) and a hole (34) to receive the pin (32) of an adjacent one of the housings to interconnect the housings in line. The pins (32) are a snap-fit in the holes (32) and the pins and holes are further shaped to restrict pivo...

A very thin, dense membrane is produced by preparing a solution of a polymer and/or prepolymer and a substantially water insoluble surface active agent in an organic liquid, allowing the solution to spread spontaneously on the surface of a liquid support substantially consisting of a polar fluid and allowing the solution to desolvate and to react, if a prepolymer is present. The membrane so produc...

A high gradient magnetic filter is enhanced by the electrophoretic effect whereby the range of effectiveness of the conventional high gradient magnetic filter for collecting suspended magnetic solid particles from liquid streams, such as power plant coolant streams, is extended to collect suspended magnetic solid particles of submicron size as well as particulates not susceptible to a magnetic fie...

In a process for catalysing or conducting a reaction on a surface there is formed on the surface a monolayer of positively charged polymer in the form of an aqueous solution or a stable aqueous colloidal dispersion of particles of particle size diameter less than 3 micrometers, the polymer having, distributed therethrough, active agent capable of reacting with, or catalysing the reaction of, said ...