Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Substrate (4)
- Conductive composites (3)
- Electrical interconnections (3)
- Electrically conductive adhesives (3)
- Electronic devices (3)
-
- Polymer (3)
- Polymeric materials (3)
- Semiconductor device (3)
- Biodiesel fuel (2)
- Composite materials (2)
- Composition (2)
- Conductive filler (2)
- Conductive thermoplastic bumps (2)
- Electronic package (2)
- Human coagulation factor (2)
- Insulative thermoplastic (2)
- Lead-free interconnection (2)
- Mammary tissue (2)
- Morphology (2)
- Precursors (2)
- Transgenic mammals (2)
- Unzippable polymer (2)
- Adhesion (1)
- Applications (1)
- Binding efficiency (1)
- Catalysts (1)
- Cellulose (1)
- Cellulosic (1)
- Chromatography (1)
- Cloud point (1)
Articles 1 - 30 of 65
Full-Text Articles in Engineering
Rapid Thermocycler System For Rapid Amplification Of Nucleic Acids And Related Methods, Joel R. Termaat, Scoltt E. Whitney, Hendrik J. Viljoen, Matthew R. Kreifels
Rapid Thermocycler System For Rapid Amplification Of Nucleic Acids And Related Methods, Joel R. Termaat, Scoltt E. Whitney, Hendrik J. Viljoen, Matthew R. Kreifels
Department of Chemical and Biomolecular Engineering: Patents
A thermo cycling device and method of operating a thermocycler instrument, the instrument including a sample holder, at least one thermal cycling element, and at least one first and second temperature sensors, for causing the sample holder containing the at least one sample to undergo polymerase chain reaction amplification by repeated cycling between at least a denaturation heating stage and an aunealing cooling stage. The first temperature corresponding with the temperature of the sample holder is monitored using the at least one first temperature sensor, and a second temperature corresponding with the temperature external of the sample holder is monitored …
Transgenic Fibrinogen, William H. Velander
Transgenic Fibrinogen, William H. Velander
Department of Chemical and Biomolecular Engineering: Patents
A transgenic, non-human mammalian animal is capable of expressing a heterologous gene for human or other recombinant physiologically functional fibrinogen holoprotein or individual subunit chain polypeptides thereof or a modified or fusion fibrinogen in mammary glands of the animals and secreting the expressed product into a body fluid. Methodology employing such a mammal yields recombinant physiologically functional fibrinogens, subunit chain polypeptides thereof, and modified or fusion fibrinogens.
Means Of Seeding And Metallizing Polyimide, Ravi F. Saraf
Means Of Seeding And Metallizing Polyimide, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A method to selectively metallize polyimide with an all electroless process.
Transgenic Non-Human Mammals Producing Fibrinogen In Their Milk, William H. Velander
Transgenic Non-Human Mammals Producing Fibrinogen In Their Milk, William H. Velander
Department of Chemical and Biomolecular Engineering: Patents
A transgenic, non-human mammalian animal is capable of expressing a heterologous gene for human or other recombinant physiologically functional fibrinogen holoprotein or individual subunit chain polypeptides thereof or a modified or fusion fibrinogen in mammary glands of the animals and secreting the expressed product into a body fluid. Methodology employing such a mammal yields recombinant physiologically functional fibrinogens, subunit chain polypeptides thereof, and modified or fusion fibrinogens.
Stable Zeolite/Cellulose Composite Materials And Method Of Preparation, Gustavo F. Larsen
Stable Zeolite/Cellulose Composite Materials And Method Of Preparation, Gustavo F. Larsen
Department of Chemical and Biomolecular Engineering: Patents
Stable cellulosic fiber material for use in forming zeolite/cellulose composites is prepared by suspending loose cellulose fibers in an aqueous solution of sodium hydroxide, potassium hydroxide or sodium silicate, stirring the resulting suspension until it reaches a macroscopically homogenous appearance, heating the resulting mixture at a temperature of 323-423 K until only dry solids remain, contacting the resulting mixture with excess distilled water to remove physically adsorbed or trapped sodium hydroxide, potassium hydroxide or sodium silicate from the fibers, and heating the resulting fiber material at 323-423 K to dry the fiber material. Stable zeolite/cellulose composite material characterized in that …
Bio-Chip, Photoluminescent Methods For Identifying Biological Material, And Apparatuses For Use With Such Methods And Bio-Chips, Ravi F. Saraf
Bio-Chip, Photoluminescent Methods For Identifying Biological Material, And Apparatuses For Use With Such Methods And Bio-Chips, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A method detects binding of molecules, advantageously without tagging molecules in the sample. A sensor is used in which is included a single stranded nucleic acid sequence and a photoluminescent material in respective layers. After the sensor is exposed to a biological sample for sufficient time for its single stranded nucleic acid sequence to bind to a material of interest, photoluminescence from the sensor can be measured. An apparatus for tagging-free detection of binding of molecules also is provided. Methods of making tagging-free sensors are provided. Also, tagging-free methods to detect binding of antigens and related devices are disclosed.
Method For Forming An Antenna And A Radio Frequency Transponder, Ravi F. Saraf
Method For Forming An Antenna And A Radio Frequency Transponder, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A method is disclosed for forming an antenna and a radio frequency transponder. The method comprises the steps of (1) forming a paste comprising metal powder, polymeric material, and solvent; and (2) screening the paste through a screen onto a substrate. Additional steps couple electrical components to the paste and dry the paste.
Self Assembled Nano-Devices Using Dna, Ravi F. Saraf
Self Assembled Nano-Devices Using Dna, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
An article of manufacture including an organic structure and inorganic atoms bonded to specific locations on the organic structure.
Synthesis Of Chemical Tags, Ravi F. Saraf
Synthesis Of Chemical Tags, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A method for forming a biological chemical tag. At least one double stranded DNA molecule is provided. At least a portion of the at least one double stranded DNA molecule is denatured. At least one chemical moiety that prohibits recrystallization of the at least one denatured portion to which the at least one chemical moiety is attached is attached to at least one nucleotide in the at least one denatured portion of the at least one double stranded DNA molecule.
Plasticized, Antiplasticized And Crystalline Conducting Polymers And Precursors Thereof, Ravi F. Saraf
Plasticized, Antiplasticized And Crystalline Conducting Polymers And Precursors Thereof, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
Materials containing precursors to electrically conductive polymers and electrically conductive polymers are described which have a high degree of crystallinity. The high degree of crystallinity is achieved by preparing the materials under conditions which provide a high degree of mobility to the polymer molecules permitting them to associate with one another to form a crystalline state. High levels of electrical conductivity are achieved in the electrically conductive materials without stretch orienting the material. The enhanced electrical conductivity is isotropic as compared to a stretch oriental film which has isotropic electrical conductivity.
Micro Goniometer For Scanning Probe Microscopy, Ravi F. Saraf
Micro Goniometer For Scanning Probe Microscopy, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A goniometer for performing scanning probe microscopy on a substrate surface is disclosed. The goniometer has a cantilever, having a cantilevered end and a supported end and a tip disposed at the cantilevered end of the cantilever. The goniometer also has a block disposed at the supported end of the cantilever. The block has at least one pair of piezoelectric layers, a pair of electrodes disposed about each individual piezoelectric layer such that varying a potential difference applied between the individual electrodes of a pair of electrodes causes the corresponding piezoelectric layer to deform, and a first insulating material disposed …
Ferroelectric Storage Read-Write Memory, Ravi F. Saraf
Ferroelectric Storage Read-Write Memory, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A memory device including at least one pair of spaced apart conductors and a ferroelectric material between the pair of conductors. The pair of conductors is spaced apart a distance sufficient to permit a tunneling current there between.
Nano-Devices Using Block-Copolymers, Ravi F. Saraf
Nano-Devices Using Block-Copolymers, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A structure including a substrate. A first electrode and a second electrode are arranged spaced apart from each other on the substrate. A polymer string is positioned on the substrate between the two electrodes, the polymer line has a width of less than about 50 nm.
Expression Of Active Human Factor Ix In Mammary Tissue And Of Milk Non Human Transgenic Mammals, William H. Velander
Expression Of Active Human Factor Ix In Mammary Tissue And Of Milk Non Human Transgenic Mammals, William H. Velander
Department of Chemical and Biomolecular Engineering: Patents
Recombinant Factor IX characterized by a high percentage of active protein can be obtained in the milk of transgenic animals that incorporate chimeric DNA molecules according to the present invention. Transgenic animals of the present invention are produced by introducing into developing embryos DNA that encodes Factor IX, such that the foreign DNA is stably incorporated in the DNA of germ line cells of the mature animal. Particularly efficient expression was accomplished using a chimeric construct comprising a mammary gland specific promoter, Factor IX cDNA that lacked the complete or any portion of the 5'-untranslated and 3'-untranslated region, which is …
Electrode Modification Using An Unzippable Polymer Paste, Ravi F. Saraf
Electrode Modification Using An Unzippable Polymer Paste, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A paste is described for capping electrodes with an oxide free metal layer incorporating a solvent, an unzippable polymer and particles. The electrode could be an interconnect such as a C4 bump. A method for forming a coating and for testing integrated circuit chips is also described. The invention overcomes the problem of interconnecting Pb containing electrodes that are covered with an insulating oxide on integrated circuit chips by coating the Pb containing electrode with Au to provide an oxide free surface for testing and interconnection.
Radio Frequency (Rf) Transponder (Tag) With Composite Antenna, Ravi F. Saraf
Radio Frequency (Rf) Transponder (Tag) With Composite Antenna, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
An antenna composed of composite material which can be screen printed is proposed for RFID transponders and other RF communication systems.
Rfid Transponders With Paste Antennas And Flip-Chip Attachment, Ravi F. Saraf
Rfid Transponders With Paste Antennas And Flip-Chip Attachment, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A radio frequency transponder is provided which comprises a substrate layer, a radio frequency integrated circuit affixed to said substrate layer; and an antenna provided on said substrate layer in electrical connection with said radio frequency integrated circuit. The antenna is comprised of a conductive paste material having a resistivity of approximately 20 µΩ-cm, which is greater than the resistivity of a conventional etched copper antenna, but still sufficiently low to provide a radio frequency transponder having acceptable read range. The substrate layer further comprises a flexible organic material. The radio frequency integrated circuit is disposed in a flip-chip configuration …
Transgenic Non-Human Mammals Expressing Human Coagulation Factor Viii And Von Willebrand Factor , William H. Velander
Transgenic Non-Human Mammals Expressing Human Coagulation Factor Viii And Von Willebrand Factor , William H. Velander
Department of Chemical and Biomolecular Engineering: Patents
A non-human transgenic mammalian animal, as described above, contains an exogenous double stranded DNA sequence stably integrated into the genome of the animal, which comprises cis-acting regulatory units operably linked to a DNA sequence encoding human Factor VIII protein and a signal peptide, where the cis-acting regulatory units are active in mammary gland cells and the signal peptide is active in directing newly expressed Factor VIII into the milk of the animal. The promoter may be a milk protein promoter such as for whey acidic protein, casein, lactalbumin, or beta-lactoglobulin promoter. The transgenic mammals are preferably farm animals, for example, …
Electrode Modification Using An Unzippable Polymer Paste, Ravi F. Saraf
Electrode Modification Using An Unzippable Polymer Paste, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A paste is described for capping electrodes with an oxide free metal layer incorporating a solvent, an unzippable polymer and particles. The electrode could be an interconnect such as a C4 bump. A method for forming a coating and for testing integrated circuit chips is also described. The invention overcomes the problem of interconnecting Pb containing electrodes that are covered with an insulating oxide on integrated circuit chips by coating the Pb containing electrode with Au to provide an oxide free surface for testing and interconnection.
Ultra High Density Storage Media And Method Thereof, Ravi F. Saraf
Ultra High Density Storage Media And Method Thereof, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A storage media for storing information having a substrate. The substrate has an upper surface and a molecular weight greater than 5,000. Preferably the material is a polymer. The material has a plurality of piles of molecular chains in selected areas formed by pushing the molecular chains of the material on its upper surface to the selected area mechanically with a mechanical tool. The piles represent written information. The mechanical tool is preferably an atomic force microscope. Another aspect of the present invention is a method for storing information having the steps of selecting a material substrate having an upper …
Polycrystalline Conducting Polymers And Precursors Thereof Having Adjustable Morphology And Properties, Ravi F. Saraf
Polycrystalline Conducting Polymers And Precursors Thereof Having Adjustable Morphology And Properties, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
Polycrystalline materials containing crystallites of precursors to electrically conductive polymers and electrically conductive polymers are described which have an adjustable high degree of crystallinity. The intersticial regions between the crystallites contains amorphous material containing precursors to electrically conductive polymers and /or electrically conductive polymers. The degree of crystallinity is achieved by preparing the materials under conditions which provide a high degree of mobility to the polymer molecules permitting them to associate with one another to form a crystalline state. This is preferable achieved by including additives, such as plasticizers and diluents, to the solution from which the polycrystalline material is …
Lead Free Conductive Composites For Electrical Interconnections, Ravi F. Saraf
Lead Free Conductive Composites For Electrical Interconnections, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
An electrically conductive paste which includes a thermoplastic polymer, a conductive metal powder and an organic solvent system is disclosed. The invention further encompasses an electrically conductive composite which includes the aforementioned thermoplastic and metal, wherein the metal represents at least about 30% by volume, based on the total volume of the composite. The composite is formed from the paste under elevated temperature. The paste is employed in processes which involve electrically connecting electrical and electronic components under process conditions which convert the paste to the composite.
Immunosorbents With Developed Binding Efficiency And Method Of Manufacture , William H. Velander
Immunosorbents With Developed Binding Efficiency And Method Of Manufacture , William H. Velander
Department of Chemical and Biomolecular Engineering: Patents
The antitope of an antibody is masked with a masking agent, followed by immobilization on a support. The masking agent is then eluted to produce an improved immunosorbent, which is capable of binding more than double the amount of an antigen than existing immunosorbents having the same antibody bound at the same density. Preferably, the masking agent is an antigen or other compound having an epitope for which the antitope of the bound antibody has an avidity. In a preferred embodiment, greater than 30% of the bound antibodies maintain the same vicinity as when unbound for specific antigen or hapten …
Corrosion And Dissolution Protection Of A Conductive Silver/Polymer Composite, Ravi F. Saraf
Corrosion And Dissolution Protection Of A Conductive Silver/Polymer Composite, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A conductive composite is described containing silver particles and a polymer which covers each silver particle and wherein a heterocyclic organic compound containing nitrogen such as benzotriazole (BTA) is present to reduce Ag dissolution and ion mobility by forming a water insoluble complex with the Ag ion. The invention overcomes the problem of silver dissolution or corrosion a conductive composite as a result of normal high Ag ion mobility in the presence of moisture and an electric field
System And Process For Producing Biodiesel Fuel With Reduced Viscosity And A Cloud Point Below Thirty-Two (32) Degrees Fahrenheit, Hossein Noureddini
System And Process For Producing Biodiesel Fuel With Reduced Viscosity And A Cloud Point Below Thirty-Two (32) Degrees Fahrenheit, Hossein Noureddini
Department of Chemical and Biomolecular Engineering: Patents
Triglycerides are reacted in a liquid phase reaction with a homogeneous basic catalyst and alcohol, such as ethanol or methanol. The reaction yields a spatially separated two phase result with an upper located non-polar phase consisting principally of transesterified triglycerides and a lower located phase consisting principally of crude glycerol and residual transesterified triglycerides. The transesterified triglycerides and/or glycerol phase is/are optionally, each separately passed through strong cationic ion exchanger(s) to remove anions, resulting in neutral product(s). The crude glycerol is then flashed to remove alcohol and is reacted with an etherifying agent, such as isobutylene or isoamylene, in the …
Electrically Conductive Polymeric Materials And Use Thereof, Ravi F. Saraf
Electrically Conductive Polymeric Materials And Use Thereof, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
The present invention relates to electrically conductive polymer blend compositions comprising a non-conducting polymeric component and an electrically conducting polymeric component and specific applications to which the blend compositions can be put.
Electrically Conductive Polymeric Materials And Use Thereof, Ravi F. Saraf
Electrically Conductive Polymeric Materials And Use Thereof, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A polymer blend composition, capable of being made electrically conductive by application of heat having an electrically conductive upon doping polymer in undoped form; the undoped polymer is selected from the group consisting of substituted and unsubstituted polyparaphenylenevinylenes, polyanilines, polyazines, polythiophenes, poly-p-phenylene sulfides, polyfuranes, polyselenophenes, polyacetylenes filtered from soluble precursors and combinations and blends thereof, compounded and blended at a molecular scale with a dielectric polymer; wherein the dielectric polymer is selected from the group consisting of interpolymers of acrylonitrile-butadiene-styrene, acetal acrylic liquid crystal polymers, polybutylene terephthalate, polycarbonate, polyester, polyetherimide, polyethersulfone, polyethylene, polyethylene terephthalate, polyphenylene oxide, polyphenylene sulfide, polypropylene, polystyrene, …
Electrically Conductive Polymeric Materials And Use Thereof, Ravi F. Saraf
Electrically Conductive Polymeric Materials And Use Thereof, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
A polymer blend composition, capable of being made electrically conductive by application of heat having an electrically conductive upon doping polymer in undoped form; the undoped polymer is selected from the group consisting of substituted and unsubstituted polyparaphenylenevinylenes, polyanilines, polyazines, polythiophenes, poly-p-phenylene sulfides, polyfuranes, polyselenophenes, polyacetylenes filtered from soluble precursors and combinations and blends thereof, compounded and blended at a molecular scale with a dielectric polymer; wherein the dielectric polymer is selected from the group consisting of interpolymers of acrylonitrile-butadiene-styrene, acetal acrylic liquid crystal polymers, polybutylene terephthalate, polycarbonate, polyester, polyetherimide, polyethersulfone, polyethylene, polyethylene terephthalate, polyphenylene oxide, polyphenylene sulfide, polypropylene, polystyrene, …
Lead-Free Interconnection For Electronic Devices, Ravi F. Saraf
Lead-Free Interconnection For Electronic Devices, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
An electronic device that is equipped with a plurality of bonding pads positioned on the device for making electrical interconnections and electrically conductive composite bumps adhered to the bonding pads wherein the bumps are formed of a composite material consisting of a thermoplastic polymer and at least about 30 volume percent of conductive metal particles based on the total volume of the metal particles and the thermoplastic polymer. The present invention is also directed to a method of making electrical interconnections to an electronic device by pressing a plurality of composite bumps of a polymeric based material against a substrate …
Enhanced Adhesion Between A Vapor Deposited Metal And An Organic Polymer Surface Exhibiting Tailored Morphology, Ravi F. Saraf
Enhanced Adhesion Between A Vapor Deposited Metal And An Organic Polymer Surface Exhibiting Tailored Morphology, Ravi F. Saraf
Department of Chemical and Biomolecular Engineering: Patents
Enhanced adhesion between a vapor deposited metal and an organic polymer surface is achieved without utilizing any intermediate surface preparatory steps. The morphology of the polymer surface is tailored to produce mounds and dimples on the surface which leads to a mechanically tougher, interdigitated metal/polymer interface. In the preferred embodiment, a solution of a solvent or solvent system and two or more polymer precursors or polymers or combinations thereof are cast in a film on a substrate and heated to spontaneously form a rough surface due to phase separation. The surface topography of such a film consists of characteristic mounds …