Abstract: Polyfluoro .gamma.-ketoester compounds are obtained by reaction of ethylenic monoolefins, a metal or quaternary ammonium cyanide, and a fluoroester. These compounds, which have a general formula R.sub.F C(O)CFYCF.sub.2 CO.sub.2 R.sup.1, can be copolymerized directly with fluorinated ethylenic monoolefins, or further reacted to form vinyl ether and allyl ether derivatives which may also be copolymerized with ethylenic comonomers, forming solid, moldable copolymers with useful properties determined by the nature of pendant functional groups R.sub.F.

Abstract: Aerocavin, a novel antibiotic substance having the structure ##STR1## and aerocyanidin, a novel antibiotic substance having the structure ##STR2## can be prepared by cultivation of the microorganism Aerocavin caviae SC 14,030 A.T.C.C. No. 53434.

Abstract: A bidirectional transmission system with echo cancellation allows simultaneous interchange of digital information between an exchange and subscribers on a single transmission line. Data flows are transmitted by packets separated by short silence intervals within which clock signals are extracted and echo-cancellation adjustment is accomplished. Use of an adaptive equalizer and a single sampling operation per sampling period are possible.

Abstract: This invention relates to certain sulfonylurea compounds having a ring structure, which is attached ortho to the sulfonyl bridge through a double bond, agricultural compositions thereof and a method of their use as general preemergence and/or postemergence herbicides or plant growth regulants.

Abstract: Compounds of the formula ##STR1## wherein the symbols have assigned meanings, and their use for controlling insects and mites.

Abstract: Compounds of the formula ##STR1## are useful in the preparation of .alpha.-acyloxy phosphonate compounds. The final products are useful as anti-hypertensive agents due to their angiotensin converting enzyme inhibition activity.

Abstract: An apparatus and method for locating dropouts. Information as to dropouts in a length of video tape is stored in memory and then used to compute data as to location of the dropouts. The data is used to position a tape-inspecting instrument such as a microscope over successive dropouts.

Abstract: Thiophenesulfonamides such as N-[(4,6-dimethylpyrimidin-2-yl)aminocarbonyl]-3-(isoxazol-3-yl)-2-thiophen esulfonamide are useful as herbicides and plant growth regulants.

Abstract: Cardiovascular activity is exhibited by compounds having the formula ##STR1## and pharmaceutically acceptable salts thereof wherein X is oxygen or sulfur;R.sub.1 is alkyl, cycloalkyl, aryl, heterocyclo, --(CH.sub.2).sub.n --Y.sub.1, or halo substituted alkyl;R.sub.2 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, --(CH.sub.2).sub.n --Y.sub.1, or halo substituted alkyl;R.sub.3 is hydrogen, alkyl, cycloalkyl, aryl, heterocyclo, --(CH.sub.2).sub.n --Y.sub.2, --(CH.sub.2).sub.p --Y.sub.3, or halo substituted alkyl;R.sub.4 is aryl or heterocyclo;Y.sub.1 is cycloalkyl, aryl, heterocyclo, hydroxyl, alkoxy, aryl--(CH.sub.2).sub.m --O--, mercapto, alkylthio, aryl--(CH.sub.2).sub.m --S--, amino, substituted amino, carbamoyl, ##STR2## Y.sub.2 is cycloalkyl, aryl, heterocyclo, carbamoyl, ##STR3## Y.sub.3 is hydroxyl, alkoxy, aryl--(CH.sub.2).sub.m --O--, mercapto, alkylthio, aryl--(CH.sub.2).sub.

Abstract: Compounds having the formula ##STR1## and alkyl esters and salts thereof. R.sub.1 is hydrogen, alkanoyl or ##STR2## R.sub.2 is hydrogen, alkyl, or phenylalkyl; n is 0 or 1; andA.sub.1 and A.sub.2 each is an .alpha.-amino or .alpha.-imino acid residue joined through a peptide bond, have useful hypotensive activity.

Abstract: N-(heterocyclicaminocarbonyl)arylsulfonamides and thienylsulfonamides in which the heterocyclic radical is disubstituted; e.g., N-[[4-(2-methoxyethyoxy)-6-methylpyrimidin-2-yl]aminocarbonyl]-2-nitrobenz enesulfonamide and N-[[4-(2,2,2-trifluoroethoxy)-6-methylpyrimidin-2-yl]aminocarbonyl]-2-nitr obenzenesulfonamide; are useful for the regulation of plant growth and as pre-emergence and post-emergence herbicides.

Abstract: A smoke hood is provided which is highly compact, quickly assembled, and light-weight. The device is defined by a tubular, transparent portion made from KAPTON, having a closed upper end and a lower skirt portion adapted to fit over at least the head of a user. A neck seal is attached to the interior of the tube and is designed to allow the user to quickly put on the hood without allowing any of the outside environment to flow into the hood. Inflow and outflow valves are attached to the hood the former of which connects to an air supply system. A method for assembling the hood is also provided along with details of an inflow valve arrangement, an outflow valve arrangement, and a kink-free air supply hose structure.

Abstract: A blend of major amounts of a first silicon resin having relatively low proportions of silanol, phenyl and methyl groups with minor amounts of a second silicone resin having higher such proportions, preferably with aluminum flake, gives good adhesion to steel, aluminum and glass substrates and good non-stick performance for cooking foods. It can be used as a single-layer coating.

Abstract: An electrical connector includes elastic female contacts arranged in an insulating housing having opening, and a spring member obtained by V-bending an elastic sheet. A flexible printed circuit (FPC), which is attached to the V-bent outside surface of the spring member and having an exposed-conductor section to be electrically connected to a contact section of the female contact, is inserted with the spring member into the housing through the opening. The respective conductors of the FPC contact the corresponding female contacts under the spring elasticity of the spring member.

Abstract: A process is provided for making a water-impermeable, vapor-permeable fabric. A lightweight continuous coating of polypropylene resin is applied to the surface of a fibrous sheet to make the sheet impermeable to water and vapor. Subsequent calendering provides vapor permeability to the sheet while maintaining liquid water impermeability. The resultant product is particularly suited for use as a roofing-tile underlayment or as an air-infiltration barrier.

Abstract: Laser beam focusing head having an unfocused-beam input, a focused-beam output and a lens located between the said input and the said output; the said head comprising a reflecting mirror between the said lens and the said output, and the said lens being located in such a position as to be directly invisible by the said output.

Abstract: Cardiovascular activity is exhibited by compounds having the formula ##STR1## and pharmaceutically acceptable salts thereof wherein X is oxygen or sulfur;R.sub.1 is alkyl, cycloalkyl, alkenyl, alkynyl, aryl --(CH.sub.2).sub.n --Y.sub.2, --(CH.sub.2).sub.p --Y.sub.3 or halo substituted alkyl;R.sub.2 is hydrogen, alkyl, alkenyl, alkynyl, cycloalkyl, aryl, --(CH.sub.2).sub.n --Y.sub.1, or halo substituted alkyl;R.sub.3 is hydrogen, alkyl, cycloalkyl, aryl, heterocyclo, --(CH.sub.2).sub.n --Y.sub.2, --(CH.sub.2).sub.p --Y.sub.3, or halo substituted alkyl;R.sub.4 is aryl or heterocyclo;Y.sub.1 is cycloalkyl, aryl, heterocyclo, hydroxyl, alkoxy, aryl--(CH.sub.2).sub.m --O--, mercapto, alkylthio, aryl--(CH.sub.2).sub.m --S--, amino, substituted amino, carbamoyl ##STR2## Y.sub.2 is cycloalkyl, aryl, heterocyclo, carbamoyl, ##STR3## Y.sub.3 is hydroxyl, alkoxy, aryl--(CH.sub.2).sub.m --O--, mercapto, alkylthio, aryl--(CH.sub.2).sub.

Abstract: Antibacterial activity is exhibited by monocyclic .beta.-lactam antibiotics having in the 1-position an --O--SO.sub.3 H activating group and in the 3-position an acylamino group of the formula ##STR1## wherein R.sub.3 and R.sub.4 are each independently hydrogen or alkyl.