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PENG J, LIU C, XING S, BAI K, LIU F. The application of electrostatic field technology for the preservation of perishable foods. FOOD SCIENCE AND TECHNOLOGY 2023. [DOI: 10.1590/fst.121722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Jiakun PENG
- China Agricultural University, China; China Agricultural University, China
| | - Chune LIU
- China Agricultural University, China
| | | | - Kaikai BAI
- China Agricultural University, China; China Agricultural University, China
| | - Feng LIU
- China Agricultural University, China
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Microampere Electric Current Causes Bacterial Membrane Damage and Two-Way Leakage in a Short Period of Time. Appl Environ Microbiol 2020; 86:AEM.01015-20. [PMID: 32561580 DOI: 10.1128/aem.01015-20] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 06/12/2020] [Indexed: 01/26/2023] Open
Abstract
Physical agents, such as low electric voltage and current, have recently gained attention for antimicrobial treatment due to their bactericidal capability. Although microampere electric current was shown to suppress the growth of bacteria, it remains unclear to what extent the microampere current damaged the bacterial membrane. Here, we investigated the membrane damage and two-way leakage caused by microampere electric current (≤100 μA) with a short exposure time (30 min). Based on MitoTracker staining, propidium iodide staining, filtration assays, and quantitative single-molecule localization microscopy, we observed significant membrane damage, which allowed two-way leakage of ions, small molecules, and proteins. This study paves the way to new development of antimicrobial applications for ultralow electric voltage and current.IMPORTANCE Although electric voltage and current have been studied for a long time in terms of their ability to suppress the growth of bacteria and to kill bacteria, increasing interest has been aroused more recently due to the prevalence of antibiotic resistance of microbes in past decades. Toward understanding the antimicrobial mechanism of low electric voltage and current, previous studies showed that treating bacteria with milliampere electric currents (≥5 mA) for ≥72 h led to significant damage of the bacterial membrane, which likely resulted in leakage of cellular contents and influx of toxic substances through the damaged membrane. However, it remains unclear to what extent membrane damage and two-way (i.e., inward and outward) leakage are caused by lower (i.e., microampere) electric current in a shorter time frame. In this work, we set out to answer this question. We observed that the membrane damage was caused by microampere electric current in half an hour, which allowed two-way leakage of ions, small molecules, and proteins.
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Stathoulias A, Milioni A, Kritikou S, Karmakolia A, Goudoudaki S, Siamoglou S, Chassomeris C, Vassilakis S, Karamperis K, Velegraki A, Anastassopoulou C, Manoussopoulos Y, Patrinos GP, Kambouris ME. Toward High-Throughput Fungal Electroculturomics and New Omics Methodologies in 21st-Century Microbiology and Ecology. ACTA ACUST UNITED AC 2020; 24:493-504. [DOI: 10.1089/omi.2020.0012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Andreas Stathoulias
- Laboratory of Pharmacogenomics and Individualized Therapy, Department of Pharmacy, School of Health Sciences, University of Patras, Patras, Greece
| | - Aphroditi Milioni
- Department of Microbiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Stavroula Kritikou
- Department of Microbiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Aikaterini Karmakolia
- Laboratory of Virology, Plant Protection Division of Patras, ELGO-Demeter, Patras, Greece
| | - Stavroula Goudoudaki
- Laboratory of Virology, Plant Protection Division of Patras, ELGO-Demeter, Patras, Greece
| | - Stavroula Siamoglou
- Laboratory of Pharmacogenomics and Individualized Therapy, Department of Pharmacy, School of Health Sciences, University of Patras, Patras, Greece
| | - Constantinos Chassomeris
- Laboratory of Pharmacogenomics and Individualized Therapy, Department of Pharmacy, School of Health Sciences, University of Patras, Patras, Greece
| | - Stamatis Vassilakis
- Laboratory of Pharmacogenomics and Individualized Therapy, Department of Pharmacy, School of Health Sciences, University of Patras, Patras, Greece
| | - Kariofyllis Karamperis
- Laboratory of Pharmacogenomics and Individualized Therapy, Department of Pharmacy, School of Health Sciences, University of Patras, Patras, Greece
| | - Aristea Velegraki
- Department of Microbiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Cleo Anastassopoulou
- Department of Microbiology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Yiannis Manoussopoulos
- Laboratory of Virology, Plant Protection Division of Patras, ELGO-Demeter, Patras, Greece
| | - George P. Patrinos
- Laboratory of Pharmacogenomics and Individualized Therapy, Department of Pharmacy, School of Health Sciences, University of Patras, Patras, Greece
| | - Manousos E. Kambouris
- Laboratory of Pharmacogenomics and Individualized Therapy, Department of Pharmacy, School of Health Sciences, University of Patras, Patras, Greece
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Palza H, Zapata PA, Angulo-Pineda C. Electroactive Smart Polymers for Biomedical Applications. MATERIALS (BASEL, SWITZERLAND) 2019; 12:E277. [PMID: 30654487 PMCID: PMC6357059 DOI: 10.3390/ma12020277] [Citation(s) in RCA: 83] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Revised: 01/02/2019] [Accepted: 01/09/2019] [Indexed: 01/05/2023]
Abstract
The flexibility in polymer properties has allowed the development of a broad range of materials with electroactivity, such as intrinsically conductive conjugated polymers, percolated conductive composites, and ionic conductive hydrogels. These smart electroactive polymers can be designed to respond rationally under an electric stimulus, triggering outstanding properties suitable for biomedical applications. This review presents a general overview of the potential applications of these electroactive smart polymers in the field of tissue engineering and biomaterials. In particular, details about the ability of these electroactive polymers to: (1) stimulate cells in the context of tissue engineering by providing electrical current; (2) mimic muscles by converting electric energy into mechanical energy through an electromechanical response; (3) deliver drugs by changing their internal configuration under an electrical stimulus; and (4) have antimicrobial behavior due to the conduction of electricity, are discussed.
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Affiliation(s)
- Humberto Palza
- Departamento de Ingeniería Química, Biotecnología y Materiales, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, 8370456 Santiago, Chile.
- Millenium Nuclei in Soft Smart Mechanical Metamaterials, Universidad de Chile, 8370456 Santiago, Chile.
| | - Paula Andrea Zapata
- Grupo de Polímeros, Facultad de Química y Biología, Universidad de Santiago de Chile, 8350709 Santiago, Chile.
| | - Carolina Angulo-Pineda
- Departamento de Ingeniería Química, Biotecnología y Materiales, Facultad de Ciencias Físicas y Matemáticas, Universidad de Chile, 8370456 Santiago, Chile.
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Alterations in Aspergillus brasiliensis ( niger ) ATCC 9642 membranes associated to metabolism modifications during application of low-intensity electric current. Bioelectrochemistry 2017. [DOI: 10.1016/j.bioelechem.2017.06.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Kambouris ME, Markogiannakis A, Arabatzis M, Manoussopoulos Y, Kantzanou M, Velegraki A. Wireless electrostimulation: a new approach in combating infection? Future Microbiol 2017; 12:255-265. [DOI: 10.2217/fmb-2017-0157] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Electrostimulation (ES), hitherto successfully employed in wound treatment, has shown potential in antimicrobial applications, suggesting its use as synergistic to or replacement of antibiotics. The differential susceptibility of pathogens and host tissue and organs to various ES modalities might allow selective use against specific infections. The use of ES is cheaper in terms of development/testing, routine application and environmental footprint. If extensive substitution of chemical compounds is achieved, the development of resistance might be reversed through negative selection. A promising setup of ES seems to be the noncontact current transfer, due to low amperage similar to innate bioelectricity, painlessness, simple logistics and low risk for treatment-caused infection.
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Affiliation(s)
| | | | - Michael Arabatzis
- Mycology Research Laboratory, Department of Microbiology, Medical School, National and Kapodistrian University of Athens 11527, Greece
| | | | - Maria Kantzanou
- Department of Hygiene, Epidemiology & Medical Statistics, National Retrovirus Reference Center, Medical School, National and Kapodistrian University of Athens 11527, Greece
| | - Aristea Velegraki
- Mycology Research Laboratory, Department of Microbiology, Medical School, National and Kapodistrian University of Athens 11527, Greece
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Wang LH, Wang MS, Zeng XA, Liu ZW. Temperature-mediated variations in cellular membrane fatty acid composition of Staphylococcus aureus in resistance to pulsed electric fields. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2016; 1858:1791-800. [DOI: 10.1016/j.bbamem.2016.05.003] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2016] [Revised: 04/25/2016] [Accepted: 05/03/2016] [Indexed: 10/21/2022]
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Bansal V, Sharma A, Ghanshyam C, Singla M, Kim KH. Influence of pulsed electric field and heat treatment on Emblica officinalis juice inoculated with Zygosaccharomyces bailii. FOOD AND BIOPRODUCTS PROCESSING 2015. [DOI: 10.1016/j.fbp.2015.05.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Inactivation of Dekkera bruxellensis yeasts in wine storage in brand new oak barrels using low electric current technology. ANN MICROBIOL 2015. [DOI: 10.1007/s13213-015-1047-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Zuehlke JM, Petrova B, Edwards CG. Advances in the control of wine spoilage by Zygosaccharomyces and Dekkera/Brettanomyces. Annu Rev Food Sci Technol 2012; 4:57-78. [PMID: 23215631 DOI: 10.1146/annurev-food-030212-182533] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Understanding the characteristics of yeast spoilage, as well as the available control technologies, is vital to producing consistent, high-quality wine. Zygosaccharomyces bailii contamination may result in refermentation and CO2 production in sweet wines or grape juice concentrate, whereas Brettanomyces bruxellensis spoilage often contributes off-odors and flavors to red wines. Early detection of these yeasts by selective/differential media or genetic methods is important to minimize potential spoilage. More established methods of microbial control include sulfur dioxide, dimethyl dicarbonate, and filtration. Current research is focused on the use of chitosan, pulsed electric fields, low electric current, and ultrasonics as means to protect wine quality.
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Affiliation(s)
- J M Zuehlke
- School of Food Science, Washington State University, Pullman, WA, USA.
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Pozo-Bayón MÁ, Monagas M, Bartolomé B, Moreno-Arribas MV. Wine features related to safety and consumer health: an integrated perspective. Crit Rev Food Sci Nutr 2012; 52:31-54. [PMID: 21991989 DOI: 10.1080/10408398.2010.489398] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
This review presents a global view of the current situation of the scientific knowledge about aspects of wine with possible repercussions (positive or negative) on consumer health and wine safety. The presence in wine of some potential harmful compounds such as phytosanitary products, trace metal compounds, sulfites, and some toxics of microbial origin, such as ochratoxin A, ethyl carbamate, and biogenic amines, is discussed. The different strategies and alternative methodologies that are being carried out to reduce or to avoid the presence of these substances in wines are also discussed. In recent years much work has focused on establishing the scientific explanations for the positive biological effects of some wine compounds. In this review, we also examine the latest knowledge regarding wine and health, focusing on two types of compounds that have been related to the positive effects of moderate wine consumption, such as phenolic compounds and bioactive peptides.
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Affiliation(s)
- M Ángeles Pozo-Bayón
- Instituto de Investigación en Ciencias de la Alimentación (CIAL) (CSIC-UAM), Madrid, Spain
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Gomes MDN, Teixeira CAA, Barbosa GM, Froes MT, Silva MB, da Veiga VF, Soares RMDA, dos Santos ALS, Holandino C. Effects of direct electric current on Herpetomonas samuelpessoai: An ultrastructural study. Bioelectromagnetics 2011; 33:334-45. [DOI: 10.1002/bem.20712] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2011] [Accepted: 09/18/2011] [Indexed: 01/28/2023]
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Velasco-Alvarez N, González I, Damian-Matsumura P, Gutiérrez-Rojas M. Enhanced hexadecane degradation and low biomass production by Aspergillus niger exposed to an electric current in a model system. BIORESOURCE TECHNOLOGY 2011; 102:1509-15. [PMID: 20739180 DOI: 10.1016/j.biortech.2010.07.111] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 07/27/2010] [Accepted: 07/28/2010] [Indexed: 05/15/2023]
Abstract
The effects of an electric current on growth and hexadecane (HXD) degradation by Aspergillus niger growth were determined. A 450-mL electrochemical cell with titanium ruthenium-oxide coated electrodes and packed with 15 g of perlite (inert biomass support) was inoculated with A. niger (2.0×10(7) spores (g of dry inert support)(-1)) and incubated for 12 days (30 °C; constant ventilation). 4.5 days after starting culture a current of 0.42 mA cm(-2) was applied for 24h. The current reduced (52±11%) growth of the culture as compared to that of a culture not exposed to current. However, HXD degradation was 96±1.4% after 8 days whereas it was 81±1.2% after 12 days in control cultures. Carbon balances of cultures not exposed to current suggested an assimilative metabolism, but a non-assimilative metabolism when the current was applied. This change can be related to an increase in total ATP content. The study contributes to the knowledge on the effects of current on the mycelial growth phase of A. niger, and suggests the possibility of manipulating the metabolism of this organism with electric current.
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Affiliation(s)
- Nancy Velasco-Alvarez
- Departamento de Biotecnología, Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, Iztapalapa 09340, DF, Mexico
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Lustrato G, Vigentini I, De Leonardis A, Alfano G, Tirelli A, Foschino R, Ranalli G. Inactivation of wine spoilage yeasts Dekkera bruxellensis using low electric current treatment (LEC). J Appl Microbiol 2010; 109:594-604. [PMID: 20148995 DOI: 10.1111/j.1365-2672.2010.04686.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
AIMS The objective of this study was to investigate the inactivation of a selected yeast Dekkera bruxellensis strain 4481 in red wine by application of low electric current treatment (LEC). METHODS AND RESULTS LEC (200 mA) was applied for 60 days to a red wine, Montepulciano d'Abruzzo, in an alternative strategy to the SO(2) addition during wine storage. The LEC effect on both cell activity and microflora viability was assessed. LEC decreased significantly the survival viable cells and increased the death rate of D. bruxellensis strain 4481 yeast. A final comparison was made of the main physico-chemical parameters of the wine after the different treatments. The study suggests the importance of an appropriate LEC treatment which limits wine deterioration in terms of off-flavours synthesis. CONCLUSIONS The results demonstrate that the growth of undesirable Dekkera can be inhibited by low voltage treatment; LEC was shown to be useful to prevent wine spoilage and has the potential of being a concrete alternative method for controlling wine spoilage. SIGNIFICANCE AND IMPACT OF THE STUDY Wine spoilage can be avoided by preventing the growth of undesirable Dekkera yeasts, through the effective use of LEC in the winemaking process.
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Affiliation(s)
- G Lustrato
- DISTAT, Università del Molise, Pesche, Italy
| | | | | | - G Alfano
- DISTAT, Università del Molise, Pesche, Italy
| | - A Tirelli
- DISTAM Università di Milano, Milano, Italy
| | - R Foschino
- DISTAM Università di Milano, Milano, Italy
| | - G Ranalli
- DISTAT, Università del Molise, Pesche, Italy
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Valle A, Zanardini E, Abbruscato P, Argenzio P, Lustrato G, Ranalli G, Sorlini C. Effects of low electric current (LEC) treatment on pure bacterial cultures. J Appl Microbiol 2008; 103:1376-85. [PMID: 17953548 DOI: 10.1111/j.1365-2672.2007.03374.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS This research focused on the effects of low electric current (LEC) on the cell viability and metabolic activity of Escherichia coli and Bacillus cereus. METHODS AND RESULTS Different LEC intensities at fixed amperage were applied, employing either graphite or copper electrode pairs, and the effects were determined by conventional cultural methods and bioindicators. On E. coli, the LEC with graphite electrodes at 5 and 10 mA led to no significant variation, but at 20 and 40 mA there was increasing inhibition of both the enzymatic activities and growth, and a reduction in ATP content. On B. cereus, similar experiments at the lower amperages did not have any inhibitor effects, however, the 40 mA current stimulated growth, ATP content and some enzymatic activities. The LEC treatment using copper electrodes caused, already at 5 mA, inhibition of bacterial growth and metabolic and enzymatic activities in both E. coli and B. cereus. CONCLUSIONS On the basis of the obtained results using different amperages and electrodes, we can conclude that E. coli seem to be more sensitive compared with B. cereus. SIGNIFICANCE AND IMPACT OF THE STUDY The study increases the knowledge on LEC treatment effects on the pure bacterial cultures.
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Affiliation(s)
- A Valle
- Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche (DISTAM), Sez. Microbiologia Agraria, Alimentare, Ecologica (MAAE), Università di Milano, Milan, Italy.
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Lustrato G, Alfano G, Belli C, Grazia L, Iorizzo M, Ranalli G. Scaling-up in industrial winemaking using low electric current as an alternative to sulfur dioxide addition. J Appl Microbiol 2007; 101:682-90. [PMID: 16907818 DOI: 10.1111/j.1365-2672.2006.02931.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS To better understand the outcome of employing low electric current (LEC) technology as a new preservation and alternative in wine technology, and to contribute to its development. It is used in industrial-scale winemaking with commercial yeast (Saccharomyces cerevisiae) during the grape must fermentation. METHODS AND RESULTS LEC (200 mA, time 16 days) was applied to fresh grape must as an alternative method to the usual sulfur dioxide addition used in the industrial process; two tanks, each 30,000 l, were employed for parallel fermentations. The results show that LEC decreased the survival time and increased the death rate of apiculate yeasts, whereas it did not affect the growth and survival of S. cerevisiae. A comparison was made of the main chemical and sensory parameters of the wines obtained. CONCLUSIONS The results have demonstrated that the low-voltage treatment had a positive effect on the grape juice fermentation (yeast microflora) during the early stages of winemaking. SIGINIFICANCE AND IMPACT OF THE STUDY: These results could be of significant importance in developing, for 'biological wine', new winemaking technologies for an innovative control process of yeast fermentation.
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Affiliation(s)
- G Lustrato
- DISTAAM, Università del Molise, Campobasso, Italy
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Reiher A, Warnke C, Radoch S, Witte H, Krtschil A, Mair T, Müller SC, Krost A. Electrical stimulation of the energy metabolism in yeast cells using a planar Ti-Au-electrode interface. J Bioenerg Biomembr 2006; 38:143-8. [PMID: 17031550 DOI: 10.1007/s10863-006-9014-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2006] [Accepted: 03/06/2006] [Indexed: 11/28/2022]
Abstract
We report on the influence of dielectric pulse injection on the energy metabolism of yeast cells with a planar interdigitated electrode interface. The energy metabolism was measured via NADH fluorescence. The application of dielectric pulses results in a distinct decrease of the fluorescence, indicating a response of the energy metabolism of the yeast cells. The reduction of the NADH signal significantly depends on the pulse parameters, i.e., amplitude and width. Furthermore, the interface is used to detect electrical changes in the cell-electrolyte system, arising from glucose-induced oscillations in yeast cells and yeast extract, by dielectric spectroscopy at 10 kHz. These dielectric investigations revealed a beta(1)-dispersion for the system electrolyte/yeast cells as well as for the system electrolyte/yeast extract. In agreement with control measurements we obtained a glycolytic period of 45 s for yeast cells and of 11 min for yeast extract.
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Affiliation(s)
- A Reiher
- Department of Semiconductor Epitaxy, Institute of Experimental Physics, Otto-von-Guericke-University Magdeburg, PO Box 4120, 39016, Magdeburg, Germany.
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Bressan M, Liberatore L, d'Alessandro N, Tonucci L, Belli C, Ranalli G. Improved combined chemical and biological treatments of olive oil mill wastewaters. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2004; 52:1228-1233. [PMID: 14995126 DOI: 10.1021/jf035128p] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A novel system was investigated, finalized to reduce the impact of highly polluting wastewaters, and based on combined actions of catalytic oxidations and microbial biotechnologies. Olive oil mill wastewaters (COD 10,000-100,000 mg O(2)/L) were oxidized up to 80-90% by stoichiometric amounts of dilute hydrogen peroxide (35%) and in the presence of water soluble iron catalysts, either Fe(II) or Fe(III), at concentrations up to 1% w/w and more, i.e., much larger than those reported for conventional Fenton processes. In the combined action, the mineralization activity of a selected microbial consortium was used to degrade residual volatile and nonvolatile organic compounds into CO(2) and biomass. The results of this search could suggest an improved operational methodology capable to reduce the potential impact of wastewater.
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Affiliation(s)
- Mario Bressan
- Dipartimento di Scienze, Università G. d'Annunzio di Chieti-Pescara, Pescara, Italy.
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Lustrato G, Alfano G, Belli C, Grazia L, Iorizzo M, Maiuro L, Massarella F, Zanardini E, Ranalli G. Controlling grape must fermentation in early winemaking phases: the role of electrochemical treatment. J Appl Microbiol 2003; 95:1087-95. [PMID: 14633038 DOI: 10.1046/j.1365-2672.2003.02057.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS To contribute to an understanding of the phenomena related to the effect of low electric current (LEC) in grape must fermentation during laboratory and pilot plant scale winemaking, with selected co-culture yeasts (Saccharomyces cerevisiae strain 404 and Hanseniaspora guilliermodii strain 465). METHODS AND RESULTS LEC (10, 30, 50 and 100 mA) was applied to fresh grape must as an alternative method to the usual addition of SO2. Parameters such as polarity, treatment duration (24-96 h) and type of inoculum yeast were varied one at a time. LEC decreased the survival time and increased the death rate of H. guilliermondii strain 465 in co-cultures, whereas it did not affect the growth and survival of S. cerevisiae strain 40. A final comparison was made of the main physico-chemical parameters on wine obtained after the different tests. CONCLUSIONS The results have demonstrated that the low voltage treatment using a pair of graphite electrodes had a positive effect on grape juice fermentation (yeast microflora) during the early stages of winemaking, even with the potential of being an alternative method to the usual addition of SO2. SIGNIFICANCE AND IMPACT OF THE STUDY These results could be of significant importance in developing new winemaking technologies for an innovative yeast fermentation control process for 'biological wine'.
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Affiliation(s)
- G Lustrato
- DISTAAM, Facoltà di Agraria, Università del Molise, Campobasso, Italy
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