Abstract: The present patent of invention describes the obtention of lasers in solid condition of dyes of the family of Rhodamines. More particularly, it describes lasers in which said dye or chromophore is to be found covalently anchored to a solid matrix, consisting in a transparent organic polymer and suficiently stable to the pumping radiation. Its application is the production of the laser emittance by an organic dye in a solid matrix and polymers containing rhodamines.

Abstract: The present invention relates to a microporous crystalline material of zeolitic nature, called ITQ-1A, to the process for its preparation and its use in processes of separation and transformation of organic compounds. In the roasted and anhydrous stage, the chemical composition of the material corresponds to the empirical formula: x(M.sub.1/n XO.sub.2):yYO.sub.2 :SiO.sub.2, wherein x has a value smaller than 0.02 and may equal 0: y has a value smaller than 0.04 and may equal 0: m is H.sup.+ or an inorganic cation with the charge +n: X is a chemical element with an oxidation status +3 (Al, Ga, B, Cr) and Y is a chemical element with an oxidation status +4 (Ti, Ge, V). When x=0 and y=0, the material may be described as a new polymorphe form of microporous silica. The material of this invention is characterized also by its X ray diffraction pattern.

Abstract: There is disclosed the use of O-.beta.-D-galactopyranosyl-D-xyloses, particularly 2-O-.beta.-D-galactopyranosyl-D-xylose and 3-O-.beta.-D-galactopyranosyl-D-xylose, for the preparation of compositions and solutions intended to the evaluation of the intestinal lactase, which present an affinity to the substantially enchanced lactase. There is also disclosed a process for producing O-.beta.-D-galactopyranosyl-D-xyloses, comprising: reacting a D-xylose and a substrate of .beta.-D-galactopyranosyl in the presence of an enzyme .beta.-galactosidase, in an aqueous medium buffered to a pH comprised between 5.0 and 9.0 and at temperature between 4 and 37.degree. C., deactivating the .beta.-galactosidase by heating at 100.degree. C. when reaching the maximum yield of formation of disaccharides detected through thin layer chromatography, and isolating the formed disaccharides through filtration in a packed column with a thinner selected between water and water/alcohol.

Abstract: Surfactants having general formula (II) ##STR1## wherein X=8-14; n=2-8. The process for obtaining such surfactants comprises the following steps;a) producing nitroarginin; b) producing N.sub..alpha. -acyl-nitroarginin c) producing N.sub..alpha. N.sub..omega. bis (N.sub..alpha. acyl-arginin).sub..alpha.,.sub..omega. diaminoalkylamide dichlorohydrate. Said surfactants are antimicrobial agents which can be applied in cosmetics, pharmacy and food industry.

Abstract: A method for producing synthetical oils and storable products of calorific energy, by co-processing waste rubber materials, especially waste tires, and coal optionally in the presence of a material containing Fe as a catalyst, comprising the steps of mixing triturated waste rubber material having a particle size of preferredly 1-5 mm, and coal having particle sizes of 0.2-1 mm, and, when used, the catalyst having a referred particle size of 0.05-0.015 mm, until obtaining a mixture, heating the mixture in a reactor to a temperature between 300.degree. C. and 500.degree. C., during 3-180 minutes, at a pressure between atmospheric pressure and 10 MPa, to enable a processing step basically consisting of a pyrolysis/hydropyrolysis. During the processing step, there is a generation of gases containing approximately 50% CO and CO.sub.2, and approximately another 50% by volume of C.sub.1 -C.sub.4 hydrocarbons, and having a calorific energy between 6000 and 8000 kcal/Nm.sup.

Abstract: The invention relates to a material comprised of silicotitanates having a crystalline structure similar to MCM-41 zeolites, said material being characterized in that it contains in its lattice atoms of titanium and channels in its porous structure whose average sizes exceed 10 .ANG., making possible its utilization in catalytic reactions wherein are involved large organic molecules, such as the oxidation of olefins to epoxides and glycols, alcohols to cetones, thio-ethers to sulfoxides and sulfones, and phenol to catechol and hydroquinone, and if Al is introduced into the structure it is then possible to prepare bifunctional catalysts "oxidant-acid/base." In order to obtain such product, and aqueous solution is used which contains the ion NR.sub.1 N.sub.2 N.sub.3 N.sub.4.sup.+ as well as another aqueous solution which contains tetramethyl ammonium hydroxide and a silica source (e.g. aerosil.RTM.. After homogenization, more silica is added, as is the Ti source ?e.g. Ti(C.sub.2 OH.sub.5).sub.4 !.

Abstract: The objective of the present patent is an acoustic chamber for treatment of gaseous effluents containing solid and liquid micro-particles in suspension at various frequencies and high intensities. The acoustic energy agglomerates the micro-particles, thereby facilitating their separation by means of conventional systems (electrostatic filters, cyclones, etc.). The chamber has a rectangular cross section and is axially traversed by the flow of the aerosols to be agglomerated (1), while the acoustic generators, being of vibrating-stepped-plate type (2) and being able to work at different frequencies, are arranged contiguously or alternatingly on the side walls to create intensive stationary fields in the various transversal sections of the chamber. To take advantage of the emissions from both faces of the acoustic generator's radiating plate, it is proposed to locate it in between of two planar reflectors which form an angle.

Abstract: The production of fibers is carried out by allowing a gas mixture containing a gaseous hydrocarbon or an appropriate gas to pass through a substrate (generally a steel sheet) arranged facing the direction of the gas stream and situated in a furnace wherein the gas reaches a temperature of 1.000.degree. C. approximately. The schematized device is comprised of the corresponding gas reservoirs, that is to say the hydrocarbon gas and the carrying and activating gas, a mixing and preheating chamber, the furnace at the outlet of which are collected or burnt the inflammable gases and the grid from the surface of which, duly activated, the carbon fibers may grow. The gist of the invention is that the gas goes through the substrate situated facing the flow, so that said flow of gas is parallel to the direction of the fiber growth. The maximum length of the fibers is set by the distance between the substrate and a substrate or mask situated at the other extremity of the chamber.

Abstract: The object of the disclosed system is the fast switching of high voltage and short duration pulses on loads which requires high instantaneous intensities, in order to provide said pulses in both directions; the system is capable in switching narrow hand signals, and therefore long duration signals. The system is based on a very lower series impedance switching channel which is comprised of two high voltage capacitors (C.sub.1) in series with two rectifying groups (GR.sub.1 and GR.sub.2) connected in opposition and whose conduction status is activated by forced injection, through said groups of a direct current controlled by a reactive network in series with a conventional low voltage unidirectional switch (CBT), thereby providing for its logical control (SL) from digital circuits TTL or CMOS.

Abstract: An improved method for determining the nucleotide base sequence of a DNA molecule employs a .phi.-29 type DNA polymerase modified to have reduced or no exonuclease activity. The method includes annealing the DNA molecule with a primer molecule able to hybridize to the DNA molecule; incubating the annealed mixture in a vessel containing four different deoxynucleoside triphosphates, a DNA polymerase, and one or more DNA synthesis terminating agents which terminate DNA synthesis at a specific nucleotide base, wherein each the agent terminates DNA synthesis at a different nucleotide base; and separating the DNA products of the incubating reaction according to size, whereby at least a part of the nucleotide base sequence of the DNA can be determined. The improvement is provision of a DNA polymerase which is a .phi.29-type DNA polymerase.

Abstract: A method for obtaining oligosaccharides starts with allylation of position (3') of .beta.-lactosides followed by controlled benzylation, which leads to perbenzylated and partially benzylated compounds. The latter are glycosylated at position 3, not benzylated, with a donor of .varies.-fucopyranosyl to yield protected trisaccharides. These and perbenzylated .beta.-Lactosides are deallylated and, later, are glycosylated with 2-azido-2-deoxy-.varies.-D-galactopyranosyl to yield protected tetrasaccharides and trisaccharides, respectively. The debenzylation of said products accompanied by the reduction of the azido group and simultaneous acetylation of the amino group produces intermediary products which, by O-deacetylation, leads respectively to the final tetrasaccharides and trisaccharides.

Abstract: An active component is used for capturing basic nitrogen in field catalytic cracking (FCC). The active component contains a modified sepiolite consisting of a modified magnesium silicate in which divalent Mg cations have been substituted by trivalent Al cations. The component has a surface area of between 50 and 600 m.sup.2 /g and an average pore radius of between 20 and 110 .ANG..

Abstract: An improved method for determining the nucleotide base sequence of a DNA molecule. The method includes annealing the DNA molecule with a primer molecule able to hybridize to the DNA molecule; incubating the annealed mixture in a vessel containing four different deoxynucleoside triphosphates, a DNA polymerase, and one or more DNA synthesis terminating agents which terminate DNA synthesis at a specific nucleotide base, wherein each the agent terminates DNA synthesis at a different nucleotide base; and separating the DNA products of the incubating reaction according to size, whereby at least a part of the nucleotide base sequence of the DNA can be determined. The improvement is provision of a DNA polymerase which is a .phi.29-type DNA polymerase.

Abstract: An improved method for determining the nucleotide base sequence of a DNA molecule. The method includes annealing the DNA molecule with a primer molecule able to hybridize to the DNA molecule; incubating the annealed mixture in a vessel containing four different deoxynucleoside triphosphates, a DNA polymerase, and one or more DNA synthesis terminating agents which terminate DNA synthesis at a specific nucleotide base, wherein each the agent terminates DNA synthesis at a different nucleotide base; and separating the DNA products of the incubating reaction according to size, whereby at least a part of the nucleotide base sequence of the DNA can be determined. The improvement is provision of a DNA-polymerase which is a .phi.29-type DNA polymerase.