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| 20150068279 | ELECTRO-ENHANCED SOLID-PHASE MICROEXTRACTION METHOD - The electro-enhanced solid-phase microextraction (EE-SPME) method involves extraction that is performed with an SPME fiber, preferably made of polydimethylsiloxane (PDMS), in the presence of an applied electric potential for a predetermined period of time. Polar analytes are extracted onto the fiber, which is the stationary phase. The solid-phase microextraction fiber is then inserted into an injection port of a gas chromatograph coupled with a mass spectrometer. The polar analytes are desorbed in the injection port, and are analyzed by GC-MS to detect and quantify the individual components. The method is particularly useful for the detection of trace amounts of plasticizers, such as phthalate esters and bisphenol A, that are known to disrupt the endocrine system of humans and animals above known levels | 03-12-2015 |
| 20150068291 | MICRO-SOLID PHASE EXTRACTION OF HALOACETIC ACIDS - The micro-solid phase extraction of haloacetic acids is a procedure that extracts haloacetic acids from aqueous solution using iron-modified rice husk silica as the stationary phase or sorbent. Rice husks provide an excellent source of silica. The sorbent is prepared by incinerating the husks to produce a powder that is treated with 1.0 M nitric acid for 24 hours to produce rice husk silica. The silica is washed with base, cetyltrimethylammonium bromide is added, and then titrated with a 10% Fe | 03-12-2015 |
| 20150068916 | CATALYST FOR ELECTROCHEMICAL DECHLORINATION OF HYDROCARBONS - The catalyst for electrochemical dechlorination of hydrocarbons, such as chlorobenzenes, is a d-block transition metal supported by rice husk ash (RHA), preferably rice husk ash-supported platinum or titanium. The catalysts are prepared from rice husk ash by the sol-gel method. In order to dechlorinate chlorinated organic compounds, such as 1,4-dichlorobenzene, 1,2-dichlorobenzene, 1,3-dichlorobenzene, and 1,2,4-trichlorobenzene, a capillary microreactor is at least partially filled with the d-block transition metal supported by rice husk ash catalyst, a buffer solution having a pH preferably between 7 and 10, and the chlorinated organic compound. An electrical potential of approximately 3 kV is then applied across the capillary microreactor to initiate the dechlorination reaction. | 03-12-2015 |
| 20150121993 | DISPERSIVE LIQUID-LIQUID MICROEXTRACTION METHOD OF DETECTING N-NITROSOAMINES - The dispersive liquid-liquid microextraction (DLLME) method of detecting N-nitrosoamines (NAs) is a DLLME performed with a xylene extraction solvent and a methanol disperser solvent. The microextraction is preferably performed by a programmable array logic (PAL) auto-sampler. Determination and measurement of concentration of the NAs in the water sample being found by a gas chromatograph coupled with a mass spectrometer (GC-MS). | 05-07-2015 |
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| 20090082528 | HYPERBRANCHED POLYMER AND CYCLOALIPHATIC EPOXY RESIN THERMOSETS - The present invention relates to rigid and clear thermosetting compositions formed from dendritic or hyperbranched polymers and cylcoaliphatic epoxy resins. The compositions may be used for coatings such as electronic device packaging, adhesives, wire coatings, and finishes. | 03-26-2009 |
| 20130168613 | HIGH IMPACT STRENGTH CONDUCTIVE ADHESIVES - The high impact strength conductive adhesive is a mixture formed from a bisphenol A-based epoxy resin, a curing agent, and silver flakes. In one embodiment, the bisphenol A-based epoxy resin forms about 10.5 wt % of the mixture and the curing agent forms about 14.5 wt % of the mixture, the balance being silver flakes. In this embodiment, the curing agent is preferably an oligomeric polyamine curing agent, such as amidoamine-polyoxypropylenediamine t-butyl phenol. Each silver flake preferably has a tap density of between about 4.0 g/cm | 07-04-2013 |
| 20140138315 | METHOD OF MAKING A WATER-STERILIZING POLYMERIC MEMBRANE - A water-sterilizing polymeric membrane is made from cotton fibers, conductive polyaniline and silver nanostructures. In a first, two-step method of making the membrane, cotton is coated with a conductive polyaniline polymer, and then silver nano structures are incorporated with the polyaniline-coated cotton by conformal or dip coating. The silver nanostructures may be in the form of silver nanoparticles, silver nanowires, silver flakes, combinations thereof, or the like. In a second, one-step approach, silver nanostructures are generated or synthesized in situ during the polymerization of aniline on the cotton fibers. In use, the membrane is used for a filter electrode by passing electrical current therethrough. Then, water to be sterilized is passed through the electrified matrix membrane, producing potable drinking water. The polyaniline, silver and electrical current all contribute to antimicrobial activity in the matrix membrane. | 05-22-2014 |
| 20140138316 | METHOD OF MAKING AND USING AN ELECTRICALLY CONDUCTIVE COMPOSITE MEMBRANE - The method of making and using an electrically conductive composite membrane provides for manufacturing of an electrically conductive composite membrane for water sterilization. The electrically conductive composite membrane is made by first dipping cotton fiber into a graphite solution to form a cotton-graphite composite fiber. The cotton-graphite composite fiber is then coated with different silver nanostructures to form a cotton-graphite-silver composite material. The cotton-graphite-silver composite material may then be dipped into a solution containing a conducting polymer, thus forming the electrically conductive composite membrane. In use, the electrically conductive composite membrane is electrified by passing electrical current therethrough. Then, water to be sterilized is passed through the electrified electrically conductive composite membrane, producing potable drinking water. | 05-22-2014 |
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| 20130052701 | ENZYMATIC TRANSESTERIFICATION/ESTERIFICATION PROCESSES EMPLOYING LIPASES IMMOBILIZED ON HYDROPHOBIC RESINS IN THE PRESENCE OF WATER SOLUTIONS - Disclosed are an enzymatic batchwise or continuous process for the production of fatty acid alkyl esters for use in the biofuels, food and detergent industries and a system therefor. The process utilizes enzymes immobilized on a hydrophobic resin mixed with a fatty acid source and an alcohol or alcohol donor in the presence of an alkaline or mild alkaline aqueous buffer, or in the presence of water or aqueous solution. The production process for fatty acid alkyl esters is carried out by transesterification or esterification simultaneously or sequentially. The biocatalyst activity is maintained with no significant activity losses in multiple uses and also avoids the accumulation of glycerol and water by-products or other hydrophilic compounds on the biocatalyst. | 02-28-2013 |
| 20140030345 | Surface-Modified Heavy Metal Nanoparticles, Compositions And Uses Thereof - Surface-modified heavy metal nanoparticles, including a heavy metal core and a coating layer, the coating layer having at least one ligand, conjugated to polyethylene glycol, the at least one ligand is selected from N-acetyl cysteine, albumin, cysteine, methionine, glutathione, amino thiols, thio-carboxylic acids, ammonia, amines, diamines or any combination thereof. Compositions including surface-modified heavy metal nanoparticles and uses thereof in treatment and diagnosis of various conditions. | 01-30-2014 |
| 20140186908 | ENZYMATIC TRANSESTERIFICATION/ESTERIFICATION PROCESSES EMPLOYING LIPASES IMMOBILIZED ON HYDROPHOBIC RESINS IN THE PRESENCE OF WATER SOLUTIONS - Disclosed are processing systems and processes for carrying out enzymatic batchwise or continuous process for the production of fatty acid alkyl esters for use in the biofuels, food and detergent industries. | 07-03-2014 |
| 20150353970 | ENZYMATIC TRANSESTERIFICATION/ESTERIFICATION PROCESSING SYSTEMS AND PROCESSES EMPLOYING LIPASES IMMOBILZED ON HYDROPHOBIC RESINS - Disclosed are processing systems and processes for carrying out enzymatic batchwise or continuous process for the production of fatty acid alkyl esters for use in the biofuels, food, cosmetics, pharmaceuticals and detergents industries. | 12-10-2015 |
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| 20090133322 | ROBUST MULTIENZYME PREPARATION FOR THE SYNTHESIS OF FATTY ACIDS ALKYL ESTERS - A process for the preparation of short-chain alkyl esters of fatty acids, preferably fatty acid methyl esters (biodiesel) in solvent-free system is disclosed. In particular, the process comprises (a) providing a fatty acid source, (b) stepwise adding a short-chain free alcohol, preferably methanol, or any other alcohol donor, to said fatty acid source in the presence of a lipase preparation and (c) allowing the reaction to proceed under suitable conditions, until said fatty acid source triglycerides are converted to fatty acid methyl esters (FAME). The lipase preparation comprises at least two lipases. The two lipases being separately or jointly immobilized on a suitable support and wherein at least one of the lipases has increased affinity for partial glycerides and at least one of the lipases is sn-1,3 positional specific. | 05-28-2009 |
| 20100035312 | IMMOBILIZED INTERFACIAL ENZYMES OF IMPROVED AND STABILIZED ACTIVITY - Disclosed is a process for the preparation of an interfacial enzyme immobilized on an insoluble support, by providing a bi-phase system comprised of an aqueous buffer solution and at least one first organic solvent; mixing said interfacial enzyme with the bi-phase system provided; adding the support to the obtained mixture and mixing; and isolating from the mixture obtained in the last step the interfacial enzyme immobilized on said support. The produced enzyme is locked in its catalytically active confirmation, and thus exhibits improved activity and stability. Also disclosed are uses of the produced enzymes, particularly in the preparation of biodiesel. | 02-11-2010 |
| 20100112040 | Preparation of Heavy Metal-Containing Nano-Liposomes and their Uses in Medical Therapy - Heavy metal-containing nano-liposome particles and their use in treating, for example, immune-related disorders, such as, cancer and inflammatory conditions, and metal deficiency-related diseases are described. The particles also can be used in diagnostic methods. The particles can contain gold, platinum or iron. | 05-06-2010 |
| 20100209982 | MODIFIED-IMMOBILIZED ENZYMES OF HIGH TOLERANCE TO HYDROPHILIC SUBSTRATES IN ORGANIC MEDIA - Disclosed are preparations of modified interfacial enzymes, particularly lipases and phospholipases, immobilized on a solid support, wherein the enzyme is surrounded by hydrophobic microenvironment, thereby protected from deactivation and/or aggregation in the presence of hydrophilic agents, substrates and/or reaction products. The enzyme may be protected by being covalently bonded with lipid groups which coat the enzyme, or by being immobilized or embedded in a hydrophobic solid support. Also disclosed are processes for the preparation of the hydrophobically protected enzymes. The enzymes may be efficiently used in the preparation of biodiesel. | 08-19-2010 |
| 20100330629 | ROBUST MULTI-ENZYME PREPARATION FOR THE SYNTHESIS OF FATTY ACID ALKYL ESTERS - Disclosed is an enzymatic process for the preparation of fatty acid alkyl esters, particularly fatty acids methyl esters (biodiesel) in a solvent-free microaqueous system, from a fatty acid source and an alcohol or alcohol donor, employing a robust lipase preparation that comprises at least two lipases separately or jointly immobilized on a suitable support, where one of the lipases has increased affinity to partial glycerides, another is sn-1,3 positional specific, and an optional third lipase has high selectivity towards sn-2 position of the glycerol backbone of the fatty acid source. | 12-30-2010 |
| 20140004581 | IMMOBILIZED INTERFACIAL ENZYMES OF IMPROVED AND STABILIZED ACTIVITY | 01-02-2014 |
