Abstract: A novel charge-shifting copolymer is provided comprising a first charge-shifting monomer that is cationic under physiological conditions and which possesses cationic groups that may be converted into anionic groups under physiological conditions, a second monomer comprising at least one primary amine that is not convertible to an anionic group under physiological conditions, and optionally, one or more monomers which are polar uncharged monomers. A hydrogel system incorporating this copolymer, as well as a capsule system, are also provided.
Type:
Grant
Filed:
June 3, 2016
Date of Patent:
September 10, 2019
Assignee:
McMaster University
Inventors:
Nicholas Burke, Samantha Ros, Harald Stover
Abstract: A polymer matrix is provided comprising an amine-containing polyampholyte covalently crosslinked with an electrophilic polymer to yield an immunocompatible polymer matrix. A hydrogel system incorporating the polymer matrix is also provided.
Abstract: The present application relates to hydrogel compositions comprising first and second precursor polymers, wherein the precursor polymers are modified poly(oligoethylene glycol methacrylate) copolymers that are crosslinked through electrophile-nucleophile reactions.
Type:
Grant
Filed:
November 4, 2015
Date of Patent:
July 30, 2019
Assignee:
McMaster University
Inventors:
Todd Hoare, Emilia Bakaic, Niels M. B. Smeets, Xudong Deng
Abstract: A computer-implemented method for tuning associations between genetic variants of sequence elements of a subject genome and a target biological characteristic to a target population is described. The method notionally partitions the subject genome into discrete contiguous genome segments and derives a tuning function for each genome segment. The tuning function tunes the associations to the target population, and derivation of the tuning function for each genome segment excludes sequence elements in that same genome segment to avoid overfitting.
Type:
Application
Filed:
September 25, 2017
Publication date:
July 25, 2019
Applicant:
McMaster University
Inventors:
Guillaume PARE, Shihong MAO, Wei Qxi DENG
Abstract: Various embodiments are described herein for a double-rotor switched reluctance machine. In one example embodiment, the double-rotor switched reluctance machine comprises an interior rotor, an exterior rotor spaced from the interior rotor and coaxially and concentrically disposed outside the interior rotor, and at least one stator disposed concentrically with the interior rotor and the exterior rotor. The interior rotor, the exterior rotor and the at least one stator are disposed within one machine set to provide an interior switched reluctance machine and an exterior switched reluctance machine. The interior switched reluctance machine and the exterior switched reluctance machine can operate as two motors, two generators, or a motor and a generator simultaneously.
Abstract: The present application is directed to methods of performing chemical reactions, including multi-step chemical reactions in which two or more of the reagents in the chemical reaction are incorporated or entrapped in a solid polymeric structure comprising pullulan. In certain embodiments, the chemical reaction or multi-step reaction serves as a sensor. Accordingly the present application is also directed to sensors for performing the methods of the application. In certain embodiments, at least one of the reagents is a biomolecule and the sensor is a biosensor. In certain other embodiments, the solid polymeric structure comprising pullulan and the reagents for performing a chemical reaction form a convenient device for performing a chemical reaction.
Type:
Application
Filed:
February 13, 2019
Publication date:
June 13, 2019
Applicant:
McMaster University
Inventors:
Carlos Filipe, John D. Brennan, Robert Pelton, Sana Jahanshahi-Anbuhi, Yingfu Li
Abstract: Various embodiments are described herein for a double-rotor switched reluctance machine with segmented rotors. In one example embodiment, the double-rotor switched reluctance machine comprises an interior rotor, an exterior rotor spaced from the interior rotor and concentrically disposed outside the interior rotor, and at least one stator disposed concentrically with the interior rotor and the exterior rotor. The interior rotor, the exterior rotor and the at least one stator are disposed within one machine set to provide an interior switched reluctance machine and an exterior switched reluctance machine. In the various embodiments described herein, at least one of the interior rotor and the exterior rotor comprises an array of magnetically isolated segments and filler segments. The interior switched reluctance machine and the exterior switched reluctance machine can operate as two motors, two generators, or a motor and a generator simultaneously.
Abstract: The embodiments described herein relate to a reconfigurable energy storage system. In one embodiment, the reconfigurable energy storage system comprises a first energy storage system, a second energy storage system and a power converter. The power converter determines a first power level, a second power level and a load coupled to the power converter and manipulates the power transfer between the energy storage systems based on the first power level, the second power level and the load. In another embodiment, the reconfigurable energy storage system also comprises a third energy storage system. In this embodiment, the power converter determines a third power level corresponding to the third energy storage system and manipulates the power transfer between the energy storage systems based also on the third power level. The third power level may correspond to a state of charge of the third energy storage element or amount of power generated by the third energy storage system.
Abstract: This disclosure relates to the field of energy recovery systems, and more particularly to exhaust heat recovery devices and exhaust flow control devices.
Type:
Application
Filed:
September 7, 2018
Publication date:
May 9, 2019
Applicant:
McMaster University
Inventors:
James Cotton, Rafat Hirmiz, Jeffrey Girad, Hossam Sadek, Yakoob Hana, Edward Corbin Bruce, Michael Cino
Abstract: A method of preserving the one or more chemical and/or biological species in a polymer matrix comprising pullulan and trehalose is described. The method includes combining the one or more chemical and/or biological species, an aqueous pullulan and a trehalose solution and drying the resultant mixture to provide a solid polymeric matrix. A polymeric matrix comprising one or more chemical and/or biological species and its use, for example, on surfaces for food preparation, for food preservation and in biological preparations is also described.
Type:
Application
Filed:
October 16, 2018
Publication date:
April 18, 2019
Applicant:
McMaster University
Inventors:
Vincent Ho Yin Leung, Sana Jahanshahi- Anbuhi, Carlos Filipe, M. Monsur Ali
Abstract: The present application is directed to methods of performing chemical reactions, including multi-step chemical reactions in which two or more of the reagents in the chemical reaction are incorporated or entrapped in a solid polymeric structure comprising pullulan. In certain embodiments, the chemical reaction or multi-step reaction serves as a sensor. Accordingly the present application is also directed to sensors for performing the methods of the application. In certain embodiments, at least one of the reagents is a biomolecule and the sensor is a biosensor. In certain other embodiments, the solid polymeric structure comprising pullulan and the reagents for performing a chemical reaction form a convenient device for performing a chemical reaction.
Type:
Grant
Filed:
November 10, 2014
Date of Patent:
March 26, 2019
Assignee:
McMaster University
Inventors:
Carlos Filipe, John D. Brennan, Robert Pelton, Sana Jahanshahi-Anbuhi, Yingfu Li
Abstract: The present application is directed to the use of electrophoresis with UV detection in the determination of iodine nutritional status in human biological specimens, specifically for monitoring iodine deficiency/inadequacy in large-scale epidemiological studies. In particular, the present application is directed to a method for determining iodide and iodide uptake inhibitors in a human biological sample when using sample self-stacking with capillary electrophoresis and UV detection.
Abstract: A system and method for detecting weapons. A radiofrequency transmitter transmits an RF signal stream into a region of interest. An RF receiver receives a scattered signal stream from the region of interest. The scattered signal stream is generated in the region of interest from the radiofrequency signal stream when a target is at least partially within the region of interest. A plurality of resonant signal components are identified from the scattered signal stream. Preprocessed resonant signal components are generated by removing environmental signal components. A target assessment is determined from the preprocessed resonant signal components using a trained statistical model. A target response is triggered if the target assessment indicates that a weapon is detected on the target.
Abstract: The present application includes stabilized adenovirus compositions comprising an adenovirus and an excipient, wherein the excipient comprises a mixture of dextran and mannitol in amounts effective to maintain at least 40% of the adenovirus activity after spray drying.
Type:
Application
Filed:
September 2, 2016
Publication date:
February 28, 2019
Applicant:
MCMASTER UNIVERSITY
Inventors:
Michael Thompson, Zhou Xing, Daniel Adam LeClair, Emily Cranston
Abstract: Systems and methods are provided for stabilizing the resonance properties of a microring resonator modulator. Intrinsic optical absorption within the p-n junction of a microring modulator resonator is employed as a feedback signal for thermally stabilizing the microring resonator modulator. In some example embodiments, the input optical power provided to a bus waveguide that is optically coupled to the microring resonator modulator is sufficiently low such that the photocurrent dependence on input power is predominantly linear in nature, thereby avoiding or reducing the effect of nonlinear absorption through two-photon absorption.
Abstract: The present application discloses a biosensor that comprises a nucleic acid probe absorbed on reduced graphene oxide, the nucleic acid probe comprising an RCA primer sequence linked to a recognition moiety for an analyte to be detected by the biosensor.
Abstract: The present application describes a biosensor for detecting target nucleic acid. The biosensor's mode of operation is based on binding of the target nucleic acid to another nucleic acid sequence and a circular template which triggers rolling circle amplification and detection of the amplified product as the indicator of the presence of the target nucleic acid. The biosensor is immobilized on a solid support, such as paper.
Abstract: The present application discloses metallophores that complex soluble gold and generate solid gold forms, including gold nanoparticles. In an embodiment, the metallophores are microbial metabolites isolated from organisms that are resistant to gold, or are analogs thereof. Methods of using the metallophores to extract and detect gold, along with detectors comprising the metallophores are disclosed.
Type:
Grant
Filed:
January 14, 2014
Date of Patent:
January 8, 2019
Assignee:
McMaster University
Inventors:
Aubrey Morgan Bailey Wyatt, Chad Johnston, Nathan Magarvey
Abstract: A method for linking a natural product and gene cluster is disclosed. In some embodiments, monomers of natural products are predicted from a gene sequence. In other emboidments, monomers of natural products are predicted from a chemical structure of a natural product. In another embodiment, monomers predicted from gene sequences are aligned with monomers predicted from chemical structures.
Type:
Application
Filed:
December 14, 2016
Publication date:
December 27, 2018
Applicant:
McMaster University
Inventors:
Nishanth MERWIN, Chris DEJONG, Chad JOHNSTON, Gregory CHEN, Haoxin LI, Michael SKINNIDER, McLean EDWARDS, Nathan MAGARVEY, Phil REES
Abstract: Two isoforms of thyroid receptor alpha (THR?1 and THR?2) have been found to be associated with the growth of cancer. Use of inhibitors of THR?1 (Formula I) and/or agonists of THR?2 (Formula II) in the treatment of such cancers is disclosed. Treatment of other disorders associated with such receptors is also contemplated, as is the use of diagnostic methods for predicting therapeutic outcomes based on the levels of expression of THR?1 and THRa?2 in a tissue sample.
Type:
Application
Filed:
December 22, 2016
Publication date:
December 27, 2018
Applicant:
MCMASTER UNIVERSITY
Inventors:
Sukhbinder Dhesy-Thind, Katarzyna J. Jerzak, Anita Bane, Jessica G. Cockburn, John A. Hassell