376
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Kennedy JF, Garaita MG. Structural Biological Materials. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00240-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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377
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Kennedy JF, Knill CJ. Protein Glycosylation. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00251-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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378
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Garaita MG, Kennedy JF. Carbohydrates. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00225-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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379
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Kennedy JF, Thorley M. Food Product Design. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00227-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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380
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381
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Kennedy JF, Thorley M. Chemical Analysis. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00223-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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382
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Kennedy JF, Cosnett IR. Food flavours biology and chemistry. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00236-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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383
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Kennedy JF, Thorley M. Novel Macromolecules in Food Systems. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00228-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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384
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Kennedy JF, Garaita MG. Frying of food. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00237-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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385
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Kosseva MR, Kennedy JF. The Handbook of Enology. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00224-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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386
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Kennedy JF, Thorley M. Polymer Blends (2 volume set). Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00204-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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387
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Garaita MG, Kennedy JF. Metabolism of Agrochemicals in Plants. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00200-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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388
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Kennedy JF, Knill CJ. Reactive Oxygen Species in Biological Systems: An Interdisciplinary Approach. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00197-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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389
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Kennedy JF, Knill CJ. Physical Chemistry of Non-aqueous Solutions of Cellulose and Its Derivatives. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00205-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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390
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Kennedy JF, Knill CJ. Glycoscience – Synthesis of Oligosaccharides and Glycoconjugates, 2nd ed. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00206-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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391
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Kennedy JF, Turan N. New Trends in Synthetic Medicinal Chemistry. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00203-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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392
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Kennedy JF, Knill CJ. Comprehensive Organic Transformations: A Guide to Functional Group Preparations (2nd ed). Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(01)00198-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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393
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Trachtenberg MC, Tu CK, Landers RA, Willson RC, McGregor ML, Laipis PJ, Kennedy JF, Paterson M, Silverman DN, Thomas D, Smith RL, Rudolph FB. Carbon dioxide transport by proteic and facilitated transport membranes. LIFE SUPPORT & BIOSPHERE SCIENCE : INTERNATIONAL JOURNAL OF EARTH SPACE 2001; 6:293-302. [PMID: 11543269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
Abstract
Membrane separation of gases is governed by the permeability of each species across the membrane. The ratio of permeabilities yields the selectivity. Use of certain organic carriers in facilitated transport membranes and the CO2 converting enzyme carbonic anhydrase (CA) in proteic and facilitated transport membranes allows a dramatic increase in CO2 selectivity over other gases. CA has a low Km (9 mM), which we predicted would allow it to scavenge CO2 to very low partial pressures. Our goal was to determine if CA could remove CO2 from an environment at levels of 0.1% or less. Prior measurements of CO2 transport across thin supported liquid membranes showed that addition of CA enhanced CO2 flux by 3- to 100-fold. Proteic films use bifunctional reagents (e.g., glutaraldehyde) to cross-link the enzyme forming a gel. Bovine serum albumin (BSA) is often added for structural stability. Using such a preparation we examined the ability of proteic films to improve CO2 selectivity and to scavenge CO2 from a mixed gas stream. Proof-of-concept results, measured by mass spectrometry, showed a fivefold improvement in CO2 capture rate with maximal improvement at CO2 values of 1% partial pressure difference in the presence of 0 atm absolute difference. At 0.1% CO2 the membrane exhibited a 76% improvement over controls. At 0.3% CO2 the improvement is about threefold. CA proteic membranes exhibit selectivity for CO2 over oxygen and nitrogen in excess of three orders of magnitude. A CA-based proteic or facilitated transport membrane should readily achieve CO2 partial pressures of 0.05% under CELSS conditions. In addition to proteic membranes we are exploring direct immobilization of engineered CA to ultra-high-permeability teflon membranes. Site-directed mutagenesis was used to add functional groups while retaining full enzymatic activity. These results provide a basis for development of far more efficient CO2 capture proteic and facilitated transport membranes with increased selectivity to values closer to 100-fold at 1% CO2. The result will be CO2 selectivity at 0.1% on the order of 400-fold. These results exceed those obtained with other technologies.
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394
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Dutra RF, Castro CM, Azevedo CR, Vinhas E, Malagueño E, Melo EH, Lima Filho JL, Kennedy JF. Immobilization of pneumococcal polysaccharide vaccine on silicon oxide wafer for an acoustical biosensor. Biosens Bioelectron 2001; 15:511-4. [PMID: 11419647 DOI: 10.1016/s0956-5663(00)00084-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
One the most important aspects of a biosensor is related to immobilization and maintenance of specific reference compounds on sensing surfaces. A method for the immobilization of polysaccharides to a silicon oxide surface intended for Surface Acoustical Waves (SAW) sensors is described. Silicon oxide is a hydrophobic inorganic support used for the fabrication of many electronic devices. The pneumococcal polysaccharide (PPS) vaccine is immobilized via Protein A after pre-treatment of the surface with hydrochloric acid. The effects of non-specific binding are discussed. The results indicate that the immobilization of PPS via Protein A increases the sensitivity of detecting Streptococcus pneumoniae antibodies in human sera and offers greater reproducibility of response compared with ELISA methods. The principles of this technique are simple and are applicable to the immobilization of many capsular polysaccharides.
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395
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Melo EH, Kennedy JF. Sweetners: Alternative. Carbohydr Polym 2001. [DOI: 10.1016/s0144-8617(00)00222-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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396
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Parmar A, Kumar H, Marwaha SS, Kennedy JF. Advances in enzymatic transformation of penicillins to 6-aminopenicillanic acid (6-APA). Biotechnol Adv 2000; 18:289-301. [PMID: 14538105 DOI: 10.1016/s0734-9750(00)00039-2] [Citation(s) in RCA: 96] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
This article elaborates on the important recent developments in the enzymatic transformation of penicillins to 6-aminopenicillanic acid (6-APA), which is the basic raw material for the industrial production of semisynthetic penicillins such as amoxycillin and ampicillin. Particular emphasis is placed on the improvements in purification, stability, and immobilization of the enzymes, (i.e. penicillin acylases) used for these transformations.
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397
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Kennedy JF, Garaita M. Conformation of Carbohydrates. Carbohydr Polym 2000. [DOI: 10.1016/s0144-8617(99)00160-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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398
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Knill CJ, Kennedy JF. Sweeteners: Nutritive. Carbohydr Polym 2000. [DOI: 10.1016/s0144-8617(99)00159-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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399
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Kennedy JF. Public involvement. HEALTH BULLETIN 2000; 58:145-7. [PMID: 12813844] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
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400
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Kennedy JF, Methacanon P. GC/MS A Practical User's Guide, Edited by McMaster, M., & McMaster, C., New York: Wiley-VCH, 1998 (xii+ 167pp. Price £38.95. ISBN 0-471-24826-6). Carbohydr Polym 1999. [DOI: 10.1016/s0144-8617(98)00161-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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