Search Results - "Karatzas, Kimon Andreas"

Selection of potential probiotic lactic acid bacteria from fermented olives by in vitro tests by Argyri, Anthoula A., Zoumpopoulou, Georgia, Karatzas, Kimon-Andreas G., Tsakalidou, Effie, Nychas, George-John E., Panagou, Efstathios Z., Tassou, Chrysoula C.

“…The present study aims to evaluate the probiotic potential of lactic acid bacteria (LAB) isolated from naturally fermented olives and select candidates to be…”
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The effect of pH control and ‘hydraulic flush’ on hydrolysis and Volatile Fatty Acids (VFA) production and profile in anaerobic leach bed reactors digesting a high solids content substrate by Cysneiros, Denise, Banks, Charles J., Heaven, Sonia, Karatzas, Kimon-Andreas G.

“…► pH control and hydraulic flush improved anaerobic leach bed reactors’ performance. ► pH control improved hydrolysis and VFA production. ► Neutral pH produced…”
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Anaerobic Digestion of Steam-Exploded Wheat Straw and Co-Digestion Strategies for Enhanced Biogas Production by Kaldis, Fokion, Cysneiros, Denise, Day, James, G. Karatzas, Kimon-Andreas, Chatzifragkou, Afroditi

“…Wheat straw (WS) is considered a favourable substrate for biogas production. However, due to its rigid structure and high carbon to nitrogen (C/N ratio), its…”
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Characterization of the Intracellular Glutamate Decarboxylase System: Analysis of Its Function, Transcription, and Role in the Acid Resistance of Various Strains of Listeria monocytogenes by KARATZAS, Kimon-Andreas G, SUUR, Laura, O'BYRNE, Conor P

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Divergent evolution of the activity and regulation of the glutamate decarboxylase systems in Listeria monocytogenes EGD-e and 10403S: roles in virulence and acid tolerance by Feehily, Conor, Finnerty, Aiden, Casey, Pat G, Hill, Colin, Gahan, Cormac G M, O'Byrne, Conor P, Karatzas, Kimon-Andreas G

“…The glutamate decarboxylase (GAD) system has been shown to be important for the survival of Listeria monocytogenes in low pH environments. The bacterium can…”
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Intracellular Accumulation of High Levels of γ-Aminobutyrate by Listeria monocytogenes 10403S in Response to Low pH: Uncoupling of γ-Aminobutyrate Synthesis from Efflux in a Chemically Defined Medium by Karatzas, Kimon-Andreas G, Brennan, Orla, Heavin, Sinéad, Morrissey, John, O'Byrne, Conor P

“…It is well established that the glutamate decarboxylase (GAD) system is central to the survival of Listeria monocytogenes at low pH, both in acidic foods and…”
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Functional γ-Aminobutyrate Shunt in Listeria monocytogenes: Role in Acid Tolerance and Succinate Biosynthesis by FEEHILY, Conor, O'BYRNE, Conor P, KARATZAS, Kimon Andreas G

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The role of phase separation and feed cycle length in leach beds coupled to methanogenic reactors for digestion of a solid substrate (Part 1): Optimisation of reactors’ performance by Cysneiros, Denise, Banks, Charles J., Heaven, Sonia, Karatzas, Kimon-Andreas G.

“…► A novel operational mode for two-phase anaerobic system is demonstrated. ► Feed cycle length and digestate retention affected reactors’ performance. ► High…”
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The role of phase separation and feed cycle length in leach beds coupled to methanogenic reactors for digestion of a solid substrate (Part 2): Hydrolysis, acidification and methanogenesis in a two-phase system by Cysneiros, Denise, Banks, Charles J., Heaven, Sonia, Karatzas, Kimon-Andreas G.

“…► The effect of feed cycle length on anaerobic digestion’s trophic stages was shown. ► Short feed cycle increased hydrolysis rate and methanogenesis in leach…”
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Thiamine plays a critical role in the acid tolerance of Listeria monocytogenes by Madeo, Moira, O'Riordan, Niamh, Fuchs, Thilo M., Utratna, Marta, Karatzas, Kimon Andreas G., O'Byrne, Conor P.

“…Abstract Understanding the molecular basis of acid tolerance in the food-borne pathogen Listeria monocytogenes is important as this property contributes to…”
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Self-Assembly and Antimicrobial Activity of Lipopeptides Containing Lysine-Rich Tripeptides by Adak, Anindyasundar, Castelletto, Valeria, de Sousa, Ana, Karatzas, Kimon-Andreas, Wilkinson, Callum, Khunti, Nikul, Seitsonen, Jani, Hamley, Ian W.

“…The conformation and self-assembly of two pairs of model lipidated tripeptides in aqueous solution are probed using a combination of spectroscopic methods…”
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Investigation into the antimicrobial activity of fumarate against Listeria monocytogenes and its mode of action under acidic conditions by Barnes, Ruth H., Karatzas, Kimon Andreas G.

“…Organic acids such as fumarate are commonly used as antimicrobials in foods. Apart from the classical mechanism of intracellular dissociation, weak acids are…”
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Gamma aminobutyric acid production by commercially available probiotic strains by Monteagudo-Mera, Andrea, Fanti, Valentina, Rodriguez-Sobstel, Claudia, Gibson, Glenn, Wijeyesekera, Anisha, Karatzas, Kimon-Andreas, Chakrabarti, Bhismadev

“…Certain bacteria can produce gamma aminobutyric acid (GABA) from glutamate in the human intestinal tract, leading to the possibility of altering GABA levels…”
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Antimicrobial Activity of Lipopeptide Biosurfactants Against Foodborne Pathogen and Food Spoilage Microorganisms and Their Cytotoxicity by Kourmentza, Konstantina, Gromada, Xavier, Michael, Nicholas, Degraeve, Charlotte, Vanier, Gaetan, Ravallec, Rozenn, Coutte, Francois, Karatzas, Kimon Andreas, Jauregi, Paula

“…Lipopeptide biosurfactants produced by sp. were assessed regarding their antimicrobial activity against foodborne pathogenic and food spoilage microorganisms…”
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Arginine-Containing Surfactant-Like Peptides: Interaction with Lipid Membranes and Antimicrobial Activity by Castelletto, Valeria, Barnes, Ruth H, Karatzas, Kimon-Andreas, Edwards-Gayle, Charlotte J. C, Greco, Francesca, Hamley, Ian W, Rambo, Robert, Seitsonen, Jani, Ruokolainen, Janne

“…The activity of antimicrobial peptides stems from their interaction with bacterial membranes, which are disrupted according to a number of proposed mechanisms…”
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A novel approach in acidic disinfection through inhibition of acid resistance mechanisms; Maleic acid-mediated inhibition of glutamate decarboxylase activity enhances acid sensitivity of Listeria monocytogenes by Paudyal, Ranju, Barnes, Ruth H., Karatzas, Kimon Andreas G.

“…Here it is demonstrated a novel approach in disinfection regimes where specific molecular acid resistance systems are inhibited aiming to eliminate…”
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Sulforaphane-enriched extracts from glucoraphanin-rich broccoli exert antimicrobial activity against gut pathogens in vitro and innovative cooking methods increase in vivo intestinal delivery of sulforaphane by Abukhabta, Salah, Khalil Ghawi, Sameer, Karatzas, Kimon Andreas, Charalampopoulos, Dimitris, McDougall, Gordon, Allwood, J. Will, Verrall, Susan, Lavery, Siobhan, Latimer, Cheryl, Pourshahidi, L. Kirsty, Lawther, Roger, O’Connor, Gloria, Rowland, Ian, Gill, Chris I. R.

“…Purpose Studies on broccoli ( Brassica oleracea var. italica ) indicate beneficial effects against a range of chronic diseases, commonly attributed to their…”
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High Phenotypic Variability among Representative Strains of Common Salmonella enterica Serovars with Possible Implications for Food Safety by Abdullah, Wan Zawiah Wan, Mackey, Bernard M, Karatzas, Kimon Andreas G

“…Salmonella is an important foodborne pathogen, whose ability to resist stress and survive can vary among strains. This variability is normally not taken into…”
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Restructuring of Lipid Membranes by an Arginine-Capped Peptide Bolaamphiphile by Castelletto, Valeria, Barnes, Ruth H, Karatzas, Kimon-Andreas, Edwards-Gayle, Charlotte J. C, Greco, Francesca, Hamley, Ian W, Seitsonen, Jani, Ruokolainen, Janne

“…We study the self-assembly of arginine-capped bolaamphiphile peptide RA3R (A: alanine, R: arginine) together with its binding to model membranes and its…”
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Supplemental Vitamin B-12 Enhances the Neural Response to Sensory Stimulation in the Barrel Cortex of Healthy Rats but Does Not Affect Spontaneous Neural Activity by Kang, Sungmin, Hayashi, Yurie, Bruyns-Haylett, Michael, Baker, Daniel H, Boura, Marcia, Wang, Xuedan, Karatzas, Kimon-Andreas, Serra, Ines, Bithell, Angela, Williams, Claire, Field, David T, Zheng, Ying

“…Although vitamin B-12 (B-12) is known to contribute to the structural and functional development of the brain, it is unclear if B-12 supplementation has any…”
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