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Oligomerisation of olefinic compounds in the presence of an activated oligomerisation catalyst

This invention relates to the oligomerization of olefinic compounds in the presence of an activated oligomerization catalyst. The invention also extends to a particular manner for providing an activated oligomerization catalyst. According to the present invention, there is provided a process for producing an oligomeric product by the oligomerization of at least one olefinic compound, the process including (a) providing an activated oligomerization catalyst by combining, in any order, iii) a source of chromium, ιv) a ligating compound of the formula (R1)mX1(Y)X2(R2)n wherein X1 and X2 are independently an atom selected from the group consisting of nitrogen, phosphorus, arsenic, antimony, bismuth, oxygen, sulphur and selenium or said atom oxidized by S, Se, N or O where the valence of X1 and/or X2 allows for such oxidation, Y is a linking group between X1 and X2 which linking group contains at least one nitrogen atom which is directly bonded to X1 or X2, m and n are independently 0, 1 or a larger integer, and R1 and R2 are independently hydrogen, a hydrocarbyl group, an organoheteryl group or a heterohydrocarbyl group, and the respective R1 groups are the same or different when m>1, and the respective R2 groups are the same or different when n>1, in) a catalyst activator which is an organoboron compound including a cation and a non-coordinating anion of the general formula [(R10)xL*-H]+[B(R20)4]− wherein L* is an atom selected from the group consisting of N, S and P, the cation [(R10)x L*-H]* is a Bronsted acid, x is an integer 1, 2 or 3, each R10 is the same or different when x is 2 or 3 and each is a —H, hydrocarbyl group or a heterohydrocarbyl group, provided that at least one of R10 comprises at least 6 carbon atoms and provided further that the total number of carbon atoms in (R10)x collectively is greater than 12, R20 independently at each occurrence is selected from the group consisting of hydride, dialkylamido, halide, alkoxide, aryloxide, hydrocarbyl, halosubstituted-hydrocarbyl radicals, halosubstituted-alkoxide, halosubstituted-aryloxide and a halosubstituted aromatic ring moiety with at least one halide substituent on the aromatic ring, and vi) an aliphatic solvent, and (b) contacting the at least one olefinic compound with the activated oligomerization catalyst to produce an oligomeric product.




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Co-processing of biomass and synthetic polymer based materials in a pyrolysis conversion process

Disclosed is a process for biomass conversion which includes co-processing the biomass with thermoplastic and non-thermoplastic polymer based materials in a catalytic pyrolysis reactor to convert such to liquid hydrocarbons; wherein hydrogen atoms originating with the polymer materials can remove oxygen from oxygenated hydrocarbons produced in the conversion of the biomass in the reactor.




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Catalyst for metathesis of ethylene and 2-butene and/or double bond isomerization

A process for the double-bond isomerization of olefins is disclosed. The process may include contacting a fluid stream comprising olefins with a fixed bed comprising an activated basic metal oxide isomerization catalyst to convert at least a portion of the olefin to its isomer. The isomerization catalysts disclosed herein may have a reduced cycle to cycle deactivation as compared to conventional catalysts, thus maintaining higher activity over the complete catalyst life cycle.




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Nanoparticles for drug delivery to the central nervous system

The present disclosure relates to compositions and methods for producing nanoparticles to provide relatively more rapid delivery of such particles across the blood-brain barrier. The nanoparticles may be formed from bis-quaternary pyridinium-aldoxime salts that may also be of a specific polymorphic structure and which may be formed in either hydrophobic or hydrophilic type liquid media. In addition, the nanoparticle for transport across the blood-brain barrier may comprise a polymeric resin encapsulating a bis-quaternary pyridinium-2-aldoxime salt.




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Metal silicate nanosheets, methods of making metal silicate nanosheets, and methods of use

Embodiments of the present disclosure relate to the preparation of colloidal dispersions or suspensions of inorganic materials with nano-sized and nano-structured morphologies, preferably the nanosheet form, compositions produced by this method, and the like.




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Composite material, method for producing the same, and apparatus for producing the same

Disclosed is a composite material wherein adhesion between a silicon surface and a plating material is enhanced. A method and an apparatus for producing the composite material are also disclosed. The method for producing a composite material comprises a dispersion/allocation step wherein the surface of a silicon substrate (102), which is a matrix provided with a silicon layer at least as the outermost layer, is immersed into a first solution containing gold (Au) ions, so that particulate or island-shaped gold (Au) serving as a first metal and substituted with a part of the silicon layer are dispersed/allocated on the matrix surface, and a plating step wherein the silicon substrate (102) is immersed into a second solution (24), which contains a reducing agent to which gold (Au) exhibits catalyst activity and metal ions which can be reduced by the reducing agent, so that the surface of the silicon substrate (102) is covered with the metal or an alloy of the metal (108) which is formed by autocatalytic electroless plating using gold (Au) as a starting point.




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Negative active material, method of preparing the same, and lithium battery including the same

Provided are a negative active material, a method of preparing the same, and a lithium battery including the negative active material. The negative active material includes a carbonaceous core that has a sulfur content of about 10 ppm to 900 ppm; and an amorphous carbon layer continuously formed on a surface of the carbonaceous core, wherein the carbonaceous core has a crystalloid plate structure, and a crystallite size measured from a full width at half maximum of the peak with respect to the surface (002) of about 10 nm to about 45 nm in an X-ray diffraction spectrum of the carbonaceous core. The lithium battery including a negative electrode including the negative active material has improved capacity characteristics and ring lifetime characteristics.




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Method of fabricating Ag-doped Te-based nano-material and memory device using the same

A nano-ionic memory device is provided. The memory device includes a substrate, a chemically inactive lower electrode provided on the substrate, a solid electrolyte layer provided on the lower electrode and including a silver (Ag)-doped telluride (Te)-based nano-material, and an oxidizable upper electrode provided on the electrolyte layer.




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Nanostructure, optical device including the same, and methods of manufacturing the nanostructure and the optical device

A nanostructure, an optical device including the nanostructure, and methods of manufacturing the nanostructure and the optical device. A method of manufacturing a nanostructure may include forming a block copolymer template layer and a precursor pattern of metal coupled to the block copolymer template layer on a graphene layer, and forming a metal nanopattern on the graphene layer by removing the block copolymer template layer and reducing the precursor pattern.




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Silica-supported oligomeric hybrid materials

A particle-polymer hybrid material can include: a substance having the structure of Formula 1 Z(Y-FP)m, wherein Z is a particle smaller than 1 mm; m is an integer; Y is a linker including a silicon atom linked to the particle; FP is a functionalized polymer having: a first structure derived from a first norbornene compound linked to the Y; and one or more repeating units linked to the first structure, each unit being derived from a second norbornene compound and having a functional group.




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Controlled synthesis of monolithically-integrated graphene structure

In a method for fabricating a graphene structure, there is formed on a fabrication substrate a pattern of a plurality of distinct graphene catalyst materials. In one graphene synthesis step, different numbers of graphene layers are formed on the catalyst materials in the formed pattern. In a method for fabricating a graphene transistor, on a fabrication substrate at least one graphene catalyst material is provided at a substrate region specified for synthesizing a graphene transistor channel and at least one graphene catalyst material is provided at a substrate region specified for synthesizing a graphene transistor source, and at a substrate region specified for synthesizing a graphene transistor drain. Then in one graphene synthesis step, at least one layer of graphene is formed at the substrate region for the graphene transistor channel, and at the regions for the transistor source and drain there are formed a plurality of layers of graphene.




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Non-volatile memory structure containing nanodots and continuous metal layer charge traps and method of making thereof

A memory device includes a semiconductor channel, a tunnel dielectric layer located over the semiconductor channel, a first charge trap including a plurality of electrically conductive nanodots located over the tunnel dielectric layer, dielectric separation layer located over the nanodots, a second charge trap including a continuous metal layer located over the separation layer, a blocking dielectric located over the second charge trap, and a control gate located over the blocking dielectric.




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Initialization method of a perpendicular magnetic random access memory (MRAM) device

Methods using a sequence of externally generated magnetic fields to initialize the magnetization directions of each of the layers in perpendicular MTJ MRAM elements for data and reference bits when the required magnetization directions are anti-parallel are described. The coercivity of the fixed pinned and reference layers can be made unequal so that one of them can be switched by a magnetic field that will reliably leave the other one unswitched. Embodiments of the invention utilize the different effective coercivity fields of the pinned, reference and free layers to selectively switch the magnetization directions using a sequence of magnetic fields of decreasing strength. Optionally the chip or wafer can be heated to reduce the required field magnitude. It is possible that the first magnetic field in the sequence can be applied during an annealing step in the MRAM manufacture process.




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Biomolecular sensor with plural metal plates and manufacturing method thereof

Disclosed are a biomolecular sensor and a method of fabricating the same having high sensitivity and resolution by using a plurality of metal plates that change electrical properties of a plurality of nanostructures according to the attachment of biomolecules. The biomolecular sensor includes a substrate, first and second electrodes disposed to be spaced apart from each other on the substrate, a plurality of nanostructures disposed on the substrate to connect the first and second electrodes to each other, and a plurality of metal plates that change electrical properties of the plurality of nanostructures according to the attachment of biomolecules.




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Nanoparticles comprising antibacterial ligands

Materials and Methods are disclosed for producing nanoparticles linked to antibacterial ligands, including antibiotics and/or molecules which bind to bacterial markers, and for the use of the nanoparticles for the treatment of conditions treatable by the antibiotic ligands.




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Device and method for forming on a nanowire made of a semiconductor an alloy of this semiconductor with a metal or a metalloid

Device for forming, on a nanowire made of a semiconductor, an alloy of this semiconductor with a metal or metalloid by bringing this nanowire into contact with electrically conductive metal or metalloid probes and Joule heating the nanowire at the points of contact with the probes so as to form an alloy such as a silicide. Application to the production of controlled-channel-length metal-silicide transistors.




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Methods of preparing metal quantum clusters in molecular confinement

Methods for the synthesis of metal quantum clusters within the framework of a porous gel matrix are described. For example, Ag25(glutathione)18 quantum clusters are synthesized in a cross-linked polyacrylamide gel matrix. The methods can be performed on large-scale and yields monodispersed metal quantum clusters.




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Liquid crystal display module

A liquid crystal display module includes a liquid crystal module and a polarizer stacked with each other. The polarizer includes a polarizing layer, a transparent conductive layer and at least two driving-sensing electrodes. The polarizing layer and the transparent conductive layer are stacked with each other. The at least two driving-sensing electrodes are spaced from each other and electrically connected with the transparent conductive layer.




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Multi-modality nanoparticles having optically responsive shape

In certain embodiments novel nanoparticles (nanowontons) are provided that are suitable for multimodal imaging and/or therapy. In one embodiment, the nanoparticles include a first biocompatible (e.g., gold) layer, an inner core layer (e.g., a non-biocompatible material), and a biocompatible (e.g., gold) layer. The first gold layer includes a concave surface that forms a first outer surface of the layered nanoparticle. The second gold layer includes a convex surface that forms a second outer surface of the layered nanoparticle. The first and second gold layers encapsulate the inner core material layer. Methods of fabricating such nanoparticles are also provided.




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Nanocrystals and amorphous nanoparticles and method for production of the same by a low energy process

A process for the production of nanocrystals or amorphous nanoparticles of actives (nanomaterials), especially from the peels of grapes. A dispersion of a micrometer-sized material in a solution of surfactant or a steric stabilizer is first provided. The macrosuspension is then stirred for at least 1 minute at a rotational speed above 500 rpm using a rotor-stator mixer. The stirred mixture is passed through a jet stream or piston-gas type high pressure homogenizer. The nanomaterials produced can be incorporated into formulations for use as nutraceutical, nutritional supplement, or as supportive treatment in medical therapy. The active can be derived from the peels of grapes.




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Ophthalmic and otorhinolaryngological device materials

Disclosed are soft, high refractive index, acrylic device materials. The materials contain a copolymeric additive for glistening resistance.




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Neutralizing agent for paints

The invention relates to a method of neutralizing paints, that includes adding at least one associative neutralizing agent to a formulation such as a pigment concentrate, a white paint base or paint. The associative neutralizing agent includes at least one neutralizing group N and at least one nitrogenous associative group A bonded together by at least one “spacer” group Sp. The invention also relates to pigment concentrates and to paints containing at least one such associative neutralizing agent.




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Surface treated calcium carbonate filler for resin and resin composition containing the filler

Provided is a surface treated calcium carbonate filler for resins, which comprises calcium carbonate particles, the surface of which has been treated with at least one surface active agent (A) selected from the group consisting of saturated fatty acids, unsaturated fatty acids, alicyclic carboxylic acids, resin acids, and salts thereof and with at least one compound (B) having the ability to chelate alkaline earth metals, the compound (B) being selected from the group consisting of phosphonic acids, polycarboxylic acids, and salts thereof. The surface treated calcium carbonate filler for resins of the present invention deteriorates little with time, has satisfactory dispersibility in resins, and can give a sheet or film which has a satisfactory balance among durability, weatherability, strength, and thermal stability, and is useful as a battery separator or a light reflector.




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Optical element for correcting color blindness

Described herein are devices, compositions, and methods for improving color discernment.




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Surface treatment of silicone materials

Disclosed herein are surface treatments for soft silicone gel materials such as silicone intraocular lenses.




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Composite material comprising a monomer with a polyalicyclic structure element

A composite material and method of making and using the same is described. In particular a dental (and preferably photocurable) composite material, and the use of a composite material according to the invention as a dental material and a method for preparation of a composite material according to the invention. Also disclosed are novel radically polymerizable monomers comprising at least one polyalicyclic structure element and certain ethylenic structure elements, which are particularly suitable for use in a composite material according to the invention.




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Dental prosthetics comprising curable acrylate polymer compositions and methods of their use

Disclosed herein are acrylic and methacrylic acid ester-based polymeric materials containing as flexibilizing and brittleness reducing agents 1-60% of C4-C8 polyalkylene or polyalkyldiene compounds, preferably having a molecular weight of 300-2100, and the use of such materials in dentistry and medicine.




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Artificial silica marble having amorphous patterns and method for preparing the same

An artificial silica marble comprises a matrix and a line pattern portion. The line pattern portion comprises fine lines having a width of about 50 to about 500 μm and forms a web- or net-like pattern. The line pattern portion divides or partitions the artificial silica marble into a plurality of irregularly shaped pattern portions to form an amorphous pattern in the cross section of the artificial silica marble.




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Coating/sealant systems, aqueous resinous dispersions, methods for making aqueous resinous dispersions, and methods of electrocoating

A coating/sealant system that includes a coating and a sealant deposited over at least a portion of the coating, in which the coating includes a reaction product formed from reactants comprising a phosphated epoxy resin and a curing agent, and the sealant includes a sulfur-containing polymer.




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Hydroswellable, segmented, aliphatic polyurethanes and polyurethane ureas

Hydroswellable, absorbable and non-absorbable, aliphatic, segmented polyurethanes and polyurethane-urea capable of swelling in the biological environment with associated increase in volume of at least 3 percent have more than one type of segments, including those derived from polyethylene glycol and the molecular chains are structurally tailored to allow the use of corresponding formulations and medical devices as carriers for bioactive agents, rheological modifiers of cyanoacrylate-based tissue adhesives, as protective devices for repairing defective or diseased components of articulating joints and their cartilage, and scaffolds for cartilage tissue engineering.




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Polymer material, ophthalmic lens and contact lens

Provided is a polymer material having superior water wettability and lubricity, and enabling persistence of the same by allowing the surfactant to be retained by the polymer material so as not to be gradually released. The present invention is directed to a polymer material including: [I] a polymer having a constitutional unit derived from (A) a polymerizable compound having an acryloyloxy group and not having a silicon atom; and [II] a surfactant. The content of the surfactant [II] is preferably 0.05% by mass or greater and 1% by mass or less. The surfactant [II] is preferably a nonionic surfactant having a polyoxyethylene group.




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Salts of dehydroacetic acid as a pyrithione stabilizer in plastics

The invention provides a method for preventing discoloration of pyrithione-containing materials, in particular plastic materials or other material such as paints, coatings, adhesives or textiles which are exposed to an outdoor environment. The method is likewise suited for preventing discoloration of other pyrithione-containing materials such as personal care compositions like shampoos. A discoloration inhibitor that includes dehydroacetic acid or a salt thereof is added to the pyrithione-containing material. The discoloration is prevented without the addition of a cyclic organic phosphoric acid ester or an organic phosphite. Use of the discoloration inhibitor does not interfere with the antimicrobial effect of the pyrithione.




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Direct-to-metal and exterior durable non-skid coating

A non-skid coating described herein attempts to overcome the deficiencies of the conventional coatings with improved external durability and color retention, a reduced level of VOCs, and direct-to-metal (DTM) adhesion using organo-siloxane chemistry. The non-skid coating has a first component having an amino-functional siloxane resin; a second component having a non-aromatic epoxy resin; a spherical filler for lowering viscosity; a pigment; a coarse aggregate; and a thixotropic agent. The amino-functional siloxane resin can be an amino-functional methyl phenyl polysiloxane, diphenyl polysiloxane or silsesquioxane-based resin. The non-aromatic epoxy resin can be cycloaliphatic or aliphatic. The first component is about 5% to 20% weight of the coating, and the second component is about 80% to 95% weight of the coating.




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Additive process for production of dimensionally stable three dimensional objects

Generally, compositions and methods of producing dimensionally stable three dimensional objects using an additive build up process. Specifically, materials combinable in an additive build up process using a materials printer for the production of stable three dimensional molds useful in the production of molded or formed parts.




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Poly(butylene-co-adipate terephthalate), method of manufacture and uses thereof

A method for preparing poly(butylene terephthalate-co-adipate) copolymer by polymerizing 1,4-butane diol, an adipic acid component and an aromatic dicarboxy compound derived from polyethylene terephthalate, and a polyester component residue in the presence of a catalyst under conditions effective to form poly(butylene terephthalate-co-adipate) oligomers; adding a quencher; and reacting the quenched poly(butylene terephthalate-co-adipate) oligomers with a chain extender.




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Multifunctional hyperbranched organic intercalating agent, method for its manufacture and its use

A facile synthesis of amphiphilic hyperbranched polymers consisting of poly(amic acid) and polyimide was developed via “A2+B3” approach from difunctional anhydride and trifunctional hydrophilic poly(oxyalkylene)triamine. Various amphiphilic hyperbranched poly(amic acid)s (HBPAAs) with terminal amine functionalities and amic acid structures were prepared through ring-opening polyaddition at room temperature, followed by thermal imidization process for the formation of hyperbranched polyimides (HBPIs), accordingly. The resulting HBPIs were analyzed by GPC, indicating the molecule weights of 5000˜7000 g/mol with a distribution of polydispersity between 2.0 and 3.8. The amine titration for HBPIs indicated the peripheral total-amine contents to be 8.32˜18.32 mequiv/g dependent on compositions.




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Polymerization process and raman analysis for olefin-based polymers

The invention provides a process for monitoring and/or adjusting a dispersion polymerization of an olefin-based polymer, the process comprising monitoring the concentration of the carbon-carbon unsaturations in the dispersion using Raman Spectroscopy. The invention also provides a process for polymerizing an olefin-based polymer, the process comprising polymerizing one or more monomer types, in the presence of at least one catalyst and at least one solvent, to form the polymer as a dispersed phase in the solvent; and monitoring the concentration of the carbon-carbon unsaturations in the dispersion using Raman Spectroscopy.




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Phosphorylcholine-based amphiphilic silicones for medical applications

Amphiphilic biomimetic phosphorylcholine-containing silicone compounds for use in both topical and internal applications as components in biomedical devices. The silicone compounds, which include zwitterionic phosphorylcholine groups, may be polymerizable or non-polymerizable. Specific examples of applications include use as active functional components in ophthalmic lenses, ophthalmic lens care solutions, liquid bandages, wound dressings, and lubricious and anti-thrombogenic coatings.




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Introspection of software program components and conditional generation of memory dump

An approach for introspection of a software component and generation of a conditional memory dump, a computing device executing an introspection program with respect to the software component is provided. An introspection system comprises one or more conditions for generating the conditional memory dump based on operations of the software component. In one aspect, a computing device detects, through an introspection program, whether the one or more conditions are satisfied by the software component based on information in an introspection analyzer of the introspection program. In addition, the computing device indicates, through the introspection program, if the one or more conditions are satisfied by the software component. In another aspect, responsive to the indication, the computing device generates the conditional memory dump through the introspection program.




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Double data rate memory physical interface high speed testing using self checking loopback

A double data rate memory physical interface having self checking loopback logic on-chip is disclosed. Disposed on the chip is a first linear feedback shift register, which is capable of generating a set of test data values that comprise at least two data bits. Also disposed on the chip is a second linear feedback shift register. The second linear feedback shift register is capable of generating a set of expected data values that match the test data values. Further, an internal loopback error check element is disposed on the chip. The internal loopback error check element is used to compare the set of expected data values with the set of test data values.




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Functional fabric based test wrapper for circuit testing of IP blocks

A Test Wrapper and associated Test Access Mechanism (TAM) architecture for facilitating testing of IP blocks integrated on a System on a Chip (SoC). The TAM architecture includes a Test Controller and one or more Test Wrappers that are integrated on the SoC proximate to IP blocks. Test data and commands corresponding to input from an external tester are packaged by the Test Controller and sent to one or more Test Wrappers via an interconnect fabric. The Test Wrappers interface with one or more IP test ports to provide test data, control, and/or stimulus signals to the IP blocks to facilitate circuit-level testing of the IP blocks. Test results for the circuit-level tests are returned to the Test Controller via the fabric. Test Wrappers may be configured to pass through interconnect signals, enabling functional testing of IP blocks to be facilitated via test packages and test results transmitted between the Test Controller and the IP blocks via the fabric. Test wrappers may also be configured to test multiple IP blocks comprising a test partition.




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Method for efficient control signaling of two codeword to one codeword transmission

In a wireless communication system, a compact control signaling scheme is provided for signaling the selected retransmission mode and codeword identifier for a codeword retransmission when one of a plurality of codewords being transmitted over two codeword pipes to a receiver fails the transmission and when the base station/transmitter switches from a higher order channel rank to a lower order channel rank, either by including one or more additional signaling bits in the control signal to identify the retransmitted codeword, or by re-using existing control signal information in a way that can be recognized by the subscriber station/receiver to identify the retransmitted codeword. With the compact control signal, the receiver is able to determine which codeword is being retransmitted and to determine the corresponding time-frequency resource allocation for the retransmitted codeword.




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Techniques for reusing components of a logical operations functional block as an error correction code correction unit

A logical operations functional block for an execution unit of a processor includes a first input data link for a first operand and a second input data link for a second operand. The execution unit includes a register connected to an error correction code detection unit. The logical operations functional block includes a look-up table configured to receive an error correction code syndrome from the error correction code detection unit. The logical operations functional block also includes a multiplexer configured to receive an output signal from the look-up table at a first input and the first operand at a second input, wherein an output of the multiplexer is coupled to the first input data link of a logical functional unit.




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Method and apparatus for decoding and checking tail-biting convolutional code

A method for decoding and checking a tail-biting convolutional code is provided. The method fully utilizes structural features of the tail-biting convolutional code to re-sort Log-Likelihood Ratio (LLR) values input into a decoder, and by reconstructing a derivative generator polynomial of a convolutional code, allows the decoder to output in serial according to a normal ordering of information bits during backtracking, that is, a first bit of an information sequence is first decoded successfully. Thus, CRC checking may be activated as soon as possible, so that part of the backtracking process and the CRC checking may be performed in parallel, thereby achieving the objective of reducing a processing time delay in decoding and checking the tail-biting convolutional code.




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Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal

A method is provided for receiving a signal. The method includes receiving a signal transmitted in a radio frequency (RF) band including at least one RF channel, demodulating the received signal, parsing a preamble of a signal frame including layer-1 information from the demodulated signal, deinterleaving bits of the layer-1 information, decoding the deinterleaved bits using an error correction decoding scheme including a shortening scheme and a puncturing scheme and obtaining physical layer pipes (PLPs) from the signal frame using the error-correction-decoded layer-1 information.




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Method and apparatus for detecting a parity error in a sequence of DQPSK symbols of a digital transmission system

The present disclosure relates to a method for detecting a parity error in a sequence of DQPSK symbols of a digital transmission system, comprising determining a first demodulated symbol r1; determining a second demodulated symbol r2; determining a first parity symbol p1; determining a second parity symbol p2; determining a super-parity symbol q1; and detecting a parity error in the sequence of DQPSK symbols by comparing a combination of the first parity symbol p1 and the second parity symbol p2 against the super-parity symbol q1, wherein a parity between two DQPSK symbols describes a phase difference between the two DQPSK symbols.




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Polymeric composition for the neutralization of noxious agents

The present application is directed to a novel composition which acts as a barrier to noxious agents while adding self-detoxifying catalytic treatments to neutralize the noxious and harmful warfare agents when applied for example on a fabric, or other solid support.




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Cationically hardenable dental composition, process of production and use thereof

The invention relates to a hardenable dental composition comprising component (A) comprising a cationically hardenable compound, component (B) comprising an initiator being able to initiate the hardening reaction of the cationically hardenable compound, and component (C) comprising a filler, wherein the filler comprises a filler body and a filler surface, the filler surface comprising side groups with polar moieties. The invention also relates to a process of producing the dental composition, to the use of the dental composition as dental impression material and to a method of taking an impression of dental tissue.




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Thermal treatment of carbonaceous waste

A method is provided for the decontamination of radioactive carbonaceous material, such as graphite, in which an injection of steam is planned into the material, concurrent with a first roasting thermal treatment of the material at a temperature between 1200° C. and 1500° C. Advantageously, the first treatment may be followed by a second treatment at a lower temperature with an injection of carbon oxide for oxidation according to the Boudouard reaction.




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Method for temporary or permanent disposal of nuclear waste

A method of disposing nuclear waste in underground rock formations is presented. The method includes the steps of selecting a land area having a rock formation positioned there-below of a depth able to prevent radioactive material placed therein from reaching the surface and drilling a vertical wellbore from the surface, to a depth ranging between 5,000 feet and 25,000 feet, into the underground rock formation or repository. A plurality of horizontal laterals or horizontal wellbores, ranging in length from 500 feet to 40,000 feet, are drilled from the vertical wellbore into the underground rock formation or repository. Nuclear waste to be stored within these laterals is encapsulated in a special waste canister and these nuclear waste canisters are positioned within the horizontal laterals wherein they are sealed to prevent loss and leakage. Means are also provided by which these canisters are adapted to allow retrievability of the canisters from the wellbore at a later date and to return the waste to the surface for use after retrieval.