Abstract: An apparatus that measures light transmitted through a fluid sample and provides a direct readout of such a measurement by electronically converting light transmitted to an electrical signal that is displayed on a readout device; the apparatus contains a power source, a light source, a photodetector, a sample holder for samples that forms a cell; the improvements used in the apparatus are as follows:(a) a color interference filter positioned between the sample and the photodetector which filters out unwanted bands of color,(b) a converter which electronically converts a current signal from the photodetector to a voltage signal,(c) a logarithmic response circuit that changes the voltage signal to a logarithmic signal proportional to the logarithm of the voltage signal; and(d) a digital voltmeter that converts the logarithm signal to a signal that is displayed on a readout device.

Abstract: Improved continuous process for disproportionating monomethylamine to dimethylamine and ammonia, said process comprising passing monomethylamine over the crystalline aluminosilicate catalyst selected from(a) mordenite wherein the primary cation is Na, HNa having at least 2% Na, Mg, Ca, Sr or Ba(b) ferrierite wherein the primary metal cation is Na, K, Mg, Ca, Sr or Ba(c) clinoptilolite and(d) phillipsite,at a temperature of 250.degree.-475.degree. C. and a pressure of 7-7000 kPa, at a feed rate of 0.1-10 g of monomethylamine/g of catalyst per hour, at a monomethylamine conversion of 15-75%.

Abstract: Angiotensin converting enzyme inhibitory action is shown in mammals by compounds having the formula ##STR1## wherein R.sub.1 and R.sub.2 are the same or different, and each is hydrogen, halogen, trifluoromethyl, or aminosulfonyl;R.sub.3 is hydrogen, alkyl, halogen or trifluoromethyl;R.sub.4 is proline or a proline derivative;R.sub.5 is hydrogen, alkyl, phenylalkyl, or a metal ion;R.sub.6 is hydrogen, hydroxy, alkyl, halogen, azido, amino, cycloalkyl, aryl, arylalkyl, carbamoyloxy, N,N-dialkylcarbamoyloxy, or --Y--R.sub.9 ;R.sub.7 and R.sub.7 ' are the same and each is halogen or --Y--R.sub.10, or R.sub.7 and R.sub.7 ' together are .dbd.O, --O--(CH.sub.2).sub.m --O-- or --S--(CH.sub.2).sub.m --S--;R.sub.8 is hydrogen and R.sub.8 ' is phenyl, 2-hydroxyphenyl or 4-hydroxyphenyl or R.sub.8 and R.sub.8 ' together are .dbd.O;R.sub.9 is alkyl, aryl, arylalkyl, 1- or 2-naphthyl, or biphenyl;R.sub.10 is alkyl, aryl or arylalkyl;Y is oxygen or sulfur; andm is 1 or 2.

Abstract: The coagulation of blood is measured by introducing the blood into an annular gap in a beaker formed between the inner surface of the beaker and a cylindrical member depending into the beaker. The beaker is mounted on the upper end of a rod-like support. A coil arrangement about the lower part of the rod-like support impresses a circular orbiting motion on the support and beaker. Another core associated with the rod-like support measures changes in amplitude of the support produced by the development of fibrin in the blood sample in the annular gap.

Abstract: 2-Chloro- and 2-bromo-1,1,1-trifluoroethane react with potassium, cesium or rubidium fluoride in aqueous solution at elevated temperature under autogenous pressure to produce 1,1,1,2-tetrafluoroethane.

Abstract: A method and an apparatus for photometrically analyzing a stream under test containing both chlorine and chlorine dioxide is characterized by heating a portion of the stream to decompose any chlorine dioxide therein into elemental chlorine. This heated portion of the stream is photometrically analyzed to determine the concentration of chlorine produced by the decomposition of chlorine dioxide, taking into account the concomitant dilution produced thereby.

Abstract: The twenty-one amino acid peptides, (X-Ser-Tyr-Asn-Leu-Leu-Gly-Phe-Leu-Gln-Arg-Ser-Ser-Asn-Phe-Gln-Y-Gln-Lys-L eu-Leu).sub.n, where X is Met or Ser, Y is His or Cys and n is 1 to 12, useful for assaying human fibroblast interferon and for purifying it.

Abstract: An improved photosensitive litho element comprises, in order, a support, a non-photosensitive solvent-soluble contiguous layer having an optical density of at least 3.0 in the visible region of the spectrum and a maximum thickness of 0.015 mm, and a solvent-processable photosensitive layer. Dot-etchable contact litho negatives and positives are provided.

Abstract: A solution polymerization process for the preparation of homopolymers of ethylene and copolymers of ethylene and higher .alpha.-olefins and a coordination catalyst for such a process are disclosed. In the process monomer is polymerized in the presence of the coordination catalyst which consists of a particular admixture of (a) a solution of an organoaluminum compound and an organomagnesium compound, with (b) a solution of a titanium compound and a vanadium compound. The catalyst exhibits relatively high activity in the polymerization of the monomers.

Abstract: A coating composition consisting essentially of certain heat-stable polymers, colorants, antioxidant, and liquid carrier useful for coating an article to produce a finish which is capable of maintaining its hue and can have a decorative pattern produced within it. The antioxidant is phosphoric acid which has been neutralized with an excess of ammonia or an organic base, preferably a volatile amine, to give a pH in the coating composition of at least about 8.5.

Abstract: A method is provided for preparing intermediates for use in 10,10-difluoro prostacyclin syntheses which method includes the steps of aceylating ketopinic acid or its acid halide to form the corresponding ketopinoyl diene ester intermediate, subjecting the diene ester to a Diels-Alder reaction by reacting same with cyclopentendione, subjecting the resulting chiral ester intermediate to a fluorination and reduction to form the corresponding chiral ester diol intermediate, subjecting the diol to solvolysis to form the chiral triol intermediate, hydroxylating the chiral triol to form a pentol intermediate, subjecting the pentol to a ring cleavage to form the difluoro dihydroxy prostacyclin intermediate ##STR1## and subjecting same to a Wittig reaction to form the difluoro dihydroxy prostacyclin intermediate ##STR2## All of the above-mentioned intermediates are novel compounds and thus are also provided.

Abstract: A railway car truck bolster is formed of channel cross section tension and compression members and a reinforced web joined together by welding to form a reinforced I-beam as the primary structural unit for the bolster. The welds joining the main structural elements are disposed to be stressed in shear rather than tension or compression for optimum fatigue performance.

Abstract: Photoimaging compositions comprising (A) 2,4,5-triphenylimidazolyl dimer having selected substituents on the 2,4 and 5 phenyl rings and an extinction coefficient determined in methylene chloride at 10.sup.-5 to 10.sup.-3 mol/liter at 350 nm of at least 4000 liters/mol-cm and at 400 nm of at least 250 liters/mol-cm; and at least one of (B1) leuco dye or (B2) addition polymerizable ethylenically unsaturated monomeric compound. The new imaging compositions are useful in preparing dual response photoimaging products such as proofing papers, printout paper, overlay films and photopolymerizable elements. Improved imaging speed is achieved at equal concentration levels when compared with conventional 2,4,5-triphenylimidazolyl dimers.

Abstract: A compound of the formula ##STR1## wherein R.sub.1 is phenyl or substituted phenyl when R.sub.2 is hydrogen or lower alkyl; andR.sub.2 is phenyl or substituted phenyl when R.sub.1 is hydrogen or lower alkyl.These compounds are useful as anti-inflammatory agents.

Abstract: A process is provided for restoring an ore deposit after uranium solution mining using ammonium carbonate leaching solutions has ceased. The process involves flushing the deposit with an aqueous solution of a potassium salt during which potassium ions exchange with ammonium ions remaining in the deposit. The ammonium-containing flushing solution is withdrawn from the deposit for disposal.

Abstract: A non-stick coated steel article, such as cookware, has a coating of a ceramic frit in two parts, first a non-porous layer, then a porous layer, overlaid with a fluorocarbon primer and, optionally, a fluorocarbon topcoat.

Abstract: Compounds, compositions and method of alleviating hypertension using a compound of the formula ##STR1## wherein R is hydrogen or lower alkyl;R.sub.1 is hydrogen, lower alkyl or phenyl-lower alkyl;R.sub.2 is hydrogen, lower alkyl or phenyl lower alkyl or halo substituted lower alkyl;R.sub.3 is hydroxy, --NHOH or lower alkoxy;Pr-COOR is a substituted proline of the structures ##STR2## R.sub.4 is halogen, keto, azido, cycloalkyl, phenyl, substituted phenyl, phenyl-lower alkyl, substituted phenyl-lower alkyl, ##STR3## or Y--R.sub.6 ; R.sub.5 is hydrogen or lower alkyl;Y is oxygen or sulfur;R.sub.6 is lower alkyl, phenyl, substituted phenyl, phenyl-lower alkyl, substituted phenyl-lower alkyl, 1- or 2-naphthyl, substituted 1- or 2- naphthyl, biphenyl, or substituted biphenyl;R.sub.7 is halogen or --Y--R.sub.8 ;R.sub.8 is lower alkyl, phenyl, phenyl-lower alkyl substituted phenyl-lower alkyl, biphenyl, napthyl, or the R.sub.

Abstract: This invention is directed to compounds of the formula ##STR1## and various intermediates therefore. The final products possess useful hypotensive activity.

Abstract: Fluoroalkoxysulfur fluorides of the formula ##STR1## wherein R is H, CH.sub.3, CF.sub.3, or C.sub.2 F.sub.5, and n is 1 or 2; their preparation by reaction of lithium fluoroalkoxides with sulfur tetrafluoride; their use as fluorinating agents to replace OH groups in organic molecules with F; and halocarbon solutions of lithium fluoroalkoxides.