151
|
Hou Y, Wang R, Gan Z, Shao T, Zhang X, He M, Sun A. Effect of cold plasma on blueberry juice quality. Food Chem 2019; 290:79-86. [PMID: 31000059 DOI: 10.1016/j.foodchem.2019.03.123] [Citation(s) in RCA: 87] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Revised: 03/18/2019] [Accepted: 03/23/2019] [Indexed: 12/23/2022]
Abstract
This work focusses on the effects of cold plasma, a novel, non-thermal technology, on the quality of blueberry juice, such as inactivation of Bacillus, anthocyanins, phenolics, vitamin C, antioxidant activity and color change. Oxygen concentration (0, 0.5% and 1%) of ionized gas was firstly confirmed to be the main factors for CP treatment, besides treatment time (2, 4 and 6 min). The increment of treatment time and oxygen concentration significantly promoted an increasing trend of death for Bacillus. Compared with thermal treatment, the content of phenolics was significantly increased by CP treatment, and also CP treatment could better keep the original color of blueberry juice. In terms of anthocyanin and vitamin C, relatively shorter exposure time to CP was more suggested. In antioxidant tests, increment of oxygen concentration resulted in the increasing trends of antioxidant activity in DPPH and ABTS assays.
Collapse
Affiliation(s)
- Yanan Hou
- Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 10083, People's Republic of China
| | - Ruixue Wang
- Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, People's Republic of China
| | - Zhilin Gan
- Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 10083, People's Republic of China.
| | - Tao Shao
- Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, People's Republic of China.
| | - Xinxue Zhang
- Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 10083, People's Republic of China
| | - Mohe He
- Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 10083, People's Republic of China
| | - Aidong Sun
- Department of Food Science and Engineering, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 10083, People's Republic of China
| |
Collapse
|
152
|
Roh SH, Lee SY, Park HH, Lee ES, Min SC. Effects of the treatment parameters on the efficacy of the inactivation of Salmonella contaminating boiled chicken breast by in-package atmospheric cold plasma treatment. Int J Food Microbiol 2019; 293:24-33. [PMID: 30634068 DOI: 10.1016/j.ijfoodmicro.2018.12.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 11/10/2018] [Accepted: 12/19/2018] [Indexed: 11/22/2022]
Abstract
The effects of surface coating, microbial loading, surface-to-volume ratio, sample stacking, mixing of samples with romaine lettuce, and shaking of the samples on the inactivation of Salmonella contaminating boiled chicken breast (BCB) cubes using in-package atmospheric dielectric barrier discharge cold plasma (ADCP) treatment at 38.7 kV were investigated. Whey protein coating increased the ADCP treatment efficacy in inactivating Salmonella on BCB cubes; the D-value increased from 0.2 to 1.3 min when the initial inoculum concentration increased from 3.8 to 5.7 log CFU/sample. ADCP decontaminated stacked BCB samples uniformly, and shaking during the treatment increased the inactivation rate. The concentrations of chicken protein isolate, water, and soybean oil in a chicken breast model food that resulted in the highest Salmonella reduction (1.7 log CFU/sample) were 20.5%, 68.9%, and 10.6%, respectively. ADCP treatment did not affect the color and tenderness of the model food, irrespective of its composition. The present study indicated that ADCP is a feasible technology to decontaminate prepackaged ready-to-eat meat cube products.
Collapse
Affiliation(s)
- Si Hyeon Roh
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Seung Young Lee
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Hyeon Hwa Park
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Eun Song Lee
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Sea C Min
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea.
| |
Collapse
|
153
|
Yodpitak S, Mahatheeranont S, Boonyawan D, Sookwong P, Roytrakul S, Norkaew O. Cold plasma treatment to improve germination and enhance the bioactive phytochemical content of germinated brown rice. Food Chem 2019; 289:328-39. [PMID: 30955620 DOI: 10.1016/j.foodchem.2019.03.061] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 03/12/2019] [Accepted: 03/12/2019] [Indexed: 01/09/2023]
Abstract
The changes in the bioactive phytochemicals of six cultivars of Thai germinated brown rice (GBR) were monitored in parallel to those of cold plasma-treated GBR (PGBR). After treatment with the optimal plasma conditions, the germination percentage, root length, and seedling height measurements of the most sensitive rice cultivar increased by 84%, 57%, and 69%, respectively. For all of the rice cultivars, there were no significant differences in the antioxidant activities of the GBRs and PGBRs. Conversely, higher contents of γ-oryzanols were observed in the PGBR group than in the GBR group during the 2-day germination period. Certain cultivars in the PGBR group reached their maximum values for total phenolic compounds, total vitamin E, certain simple phenolics, phytosterols, triterpenoids, and anthocyanins one day earlier than the same values for GBR. In contrast, the concentrations of 2-acetyl-1-pyrroline in both the GBR and PGBR samples were reduced significantly with increased germination time.
Collapse
|
154
|
Mahnot NK, Mahanta CL, Keener KM, Misra NN. Strategy to achieve a 5-log Salmonella inactivation in tender coconut water using high voltage atmospheric cold plasma (HVACP). Food Chem 2019; 284:303-311. [PMID: 30744862 DOI: 10.1016/j.foodchem.2019.01.084] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 12/07/2018] [Accepted: 01/08/2019] [Indexed: 11/18/2022]
Abstract
This study examined high voltage atmospheric cold plasma (HVACP) technology as a non-thermal intervention for inactivating Salmonella enterica serovar Typhimurium LT2 (ST2) in tender coconut water (TCW). Treatment with HVACP in air at 90 kV for 120 s inactivated 1.30 log10 of ST2. Development of a TCW stimulant suggested an interfering role of magnesium and phosphate salts with HVACP inactivation. Generation of reactive gas species, viz. ozone and hydrogen peroxides were found to be responsible for microbial inactivation. The addition of 400 ppm citric acid to the TCW effectively reduced ST2 by 5 log10 during HVACP treatment. Under these conditions, higher cellular leakage and morphological damage were observed in ST2. Minimal physico-chemical changes in TCW were observed with HVACP treatment, except for an 84.35% ascorbic acid loss (added externally). These results demonstrate a potential pathway for developing highly effective cold plasma treatments to preserve fruit and vegetable juices.
Collapse
Affiliation(s)
- Nikhil Kumar Mahnot
- Department of Food Engineering and Technology, School of Engineering, Tezpur University, Assam, India; Department of Food Sciences, Purdue University, West Lafayette, IN, USA
| | - Charu Lata Mahanta
- Department of Food Engineering and Technology, School of Engineering, Tezpur University, Assam, India.
| | - Kevin M Keener
- Department of Food Sciences, Purdue University, West Lafayette, IN, USA; Center for Crops Utilization Research, Iowa State University, Ames, IA, USA; BioCentury Research Farm, Iowa State University, Ames, IA, USA.
| | - N N Misra
- Center for Crops Utilization Research, Iowa State University, Ames, IA, USA.
| |
Collapse
|
155
|
Sheteiwy MS, An J, Yin M, Jia X, Guan Y, He F, Hu J. Cold plasma treatment and exogenous salicylic acid priming enhances salinity tolerance of Oryza sativa seedlings. Protoplasma 2019; 256:79-99. [PMID: 29984388 DOI: 10.1007/s00709-018-1279-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 06/15/2018] [Indexed: 05/06/2023]
Abstract
The present study was designed to highlight the effects of cold plasma (10 kV) treatment and priming with 2 mM salicylic acid (SA) and their combination (10 kV of plasma + 2 mM SA) on the physiological parameters and metabolism of two cultivars of Oryza sativa, i.e., Zhu Liang You 06 (ZY) and Qian You No. 1 (QY), under salinity stress (150 mM NaCl) and normal growth condition (0 mM NaCl). Seed germination and seedling growth were enhanced by SA priming and cold plasma treatment either alone or in combination under salinity stress. Photosynthetic pigments, photosynthetic gas exchange, and chlorophyll fluorescence were improved by cold plasma treatment and SA priming under salinity stress as compared to the untreated seeds. The activities of antioxidant enzymes were significantly improved by the combination of SA priming and cold plasma treatment in both cultivars under salinity stress. There were rapid changes in the cellular content of sodium (Na+) and calcium (Ca+), where the plants grown under saline conditions accumulate more Na+ and less Ca+ contents resulting in ionic imbalances. Interestingly, cold plasma and SA treatments diminished this action by reducing Na+ accumulation and increasing K+ and Ca+ contents in the plant cell under salinity stress. The activities of enzymes involved in secondary metabolism assimilation were up-regulated with cold plasma and SA priming either alone or combination under salinity stress. An increase in reactive oxygen species (ROS) accumulation and malondialdehyde (MDA) content was also observed under salinity stress condition. On contrast, seed treated with SA and plasma alone or combined resulted in a significant decrease in ROS and MDA contents under salinity stress. Our results indicated that SA priming and cold plasma treatment either alone or combined improved plant uptake of nutrients in both cultivars under stress conditions. The ultrastructural changes were observed to be more prominent in ZY than QY cultivar. Plants without SA priming or cold plasma treatments have a big vacuole due to the movement of ions into the vacuole directly from the apoplast into the vacuole through membrane vesiculation leading to membrane destabilization. However, SA priming and cold plasma treatment alone or combined helped the plants to recover their cell turgidity under salinity stress.
Collapse
Affiliation(s)
- Mohamed S Sheteiwy
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
- Department of Agronomy, Faculty of Agriculture, Mansoura University, Mansoura, 35516, Egypt
| | - Jianyu An
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Mengqi Yin
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Xiaowen Jia
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yajing Guan
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
| | - Fei He
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Jin Hu
- Seed Science Center, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
| |
Collapse
|
156
|
Putnik P, Kresoja Ž, Bosiljkov T, Režek Jambrak A, Barba FJ, Lorenzo JM, Roohinejad S, Granato D, Žuntar I, Bursać Kovačević D. Comparing the effects of thermal and non-thermal technologies on pomegranate juice quality: A review. Food Chem 2018; 279:150-161. [PMID: 30611474 DOI: 10.1016/j.foodchem.2018.11.131] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 11/22/2018] [Accepted: 11/26/2018] [Indexed: 11/15/2022]
Abstract
The consumption of pomegranate juice (PJ) has increased substantially since scientific literature reported its therapeutic benefits that are attributable to antioxidant, antimicrobial, anti-carcinogenic, and anti-inflammatory properties. The growing consumer demands for fresh and high-quality food products have led to the interest in non-thermal technologies for preservation of fruit juices. Although thermal pasteurization is the most widely used preservation technology, it has adverse effects on the nutritional and sensory quality of juices. Conversely, non-thermal technologies are suitable alternatives for preservation and without negative effects on the quality. However, there is limited scientific literature concerning the use of non-thermal technologies for preservation of PJ. Therefore, this review focuses on PJ preservation by using non-thermal technologies. In conclusion, pomegranate is an economical crop that can justify the use of advanced non-thermal technologies for PJ preservation, as consumers' interest can offset the expenses associated with investments in alternative technological options and processing adjustments.
Collapse
Affiliation(s)
- Predrag Putnik
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - Željka Kresoja
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - Tomislav Bosiljkov
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - Anet Režek Jambrak
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia
| | - Francisco J Barba
- Nutrition and Food Science Area, Preventive Medicine and Public Health, Food Sciences, Toxicology and Forensic Medicine Department, Faculty of Pharmacy, Universitat de València, Avda. Vicent Andrés Estellés, s/n, 46100 Burjassot, València, Spain
| | - Jose M Lorenzo
- Centro Tecnológico de la Carne de Galicia, Adva. Galicia n° 4, Parque Tecnológico de Galicia, San Cibrao das Viñas, 32900 Ourense, Spain
| | - Shahin Roohinejad
- Department of Food Science and Nutrition, University of Minnesota, St. Paul, MN 55108, USA; Burn and Wound Healing Research Center, Division of Food and Nutrition, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Daniel Granato
- Department of Food Engineering, State University of Ponta Grossa, Ponta Grossa, Brazil
| | - Irena Žuntar
- Faculty of Pharmacy and Biochemistry of the University of Zagreb, A. Kovačića 1, 10000 Zagreb, Croatia
| | - Danijela Bursać Kovačević
- Faculty of Food Technology and Biotechnology, University of Zagreb, Pierottijeva 6, 10000 Zagreb, Croatia.
| |
Collapse
|
157
|
Dong P, Yang F, Cheng X, Huang Z, Nie X, Xiao Y, Zhang X. Plasmon enhanced photocatalytic and antimicrobial activities of Ag-TiO 2 nanocomposites under visible light irradiation prepared by DBD cold plasma treatment. Mater Sci Eng C Mater Biol Appl 2018; 96:197-204. [PMID: 30606525 DOI: 10.1016/j.msec.2018.11.005] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Revised: 09/20/2018] [Accepted: 11/03/2018] [Indexed: 12/17/2022]
Abstract
Silver nanoparticles (Ag NPs) have been deposited on powder P25 by a novel two-step method involving a precipitation reaction and atmospheric pressure dielectric barrier discharge (DBD) cold plasma treatment without the use of any environmentally and biologically hazardous reducing agents. The silver precursor is formed in the processing of precipitation reaction and then completely reduced to the metallic state by atmospheric pressure DBD cold plasma treatment as proved by X-ray photoelectron spectroscopy, UV-Visible absorption spectra and HRTEM analyses. TEM images indicate that the Ag NPs with average diameter of 3.7 nm were deposited on powder P25 with high dispersion although no reducing agents, stabilizers or surfactants were used. The prepared products show remarkable improvement for methylene blue (MB) photodegradation and effective inhibition of bacterias against Escherichia coli and Staphylococcus aureus.
Collapse
Affiliation(s)
- Peimei Dong
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Fangfang Yang
- School of Pharmaceutical Biotechnology, Zhejiang University, Hangzhou 310027, China
| | - Xudong Cheng
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhengfeng Huang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xiaoxiao Nie
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yonghong Xiao
- State Key Laboratory for Diagnosis and Treatment of Infectious Diseases, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, The First Affiliated Hospital of Medical College, Zhejiang University, 310003, China
| | - Xiwen Zhang
- State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.
| |
Collapse
|
158
|
Silveira MR, Coutinho NM, Rocha RS, Moraes J, Esmerino EA, Pimentel TC, Freitas MQ, Silva MC, Raices RSL, Senaka Ranadheera C, Borges FO, Fonteles TV, Neto RPC, Tavares MIB, Fernandes FAN, Rodrigues S, Cruz AG. Guava flavored whey-beverage processed by cold plasma: Physical characteristics, thermal behavior and microstructure. Food Res Int 2018; 119:564-570. [PMID: 30884690 DOI: 10.1016/j.foodres.2018.10.033] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Revised: 09/30/2018] [Accepted: 10/07/2018] [Indexed: 11/15/2022]
Abstract
The present study aimed to compare the physicochemical (pH), physical (rheology parameters and particle size), microstructure (optical microscopy) and thermal properties (differential scanning calorimetry) of guava flavored whey-beverages submitted to cold plama technology in different processing time (5, 10, and 15 min) and gas flow (10, 20, and 30 mL min-1) conditions with a conventional pasteurized product. Whey beverages treated by cold plasma presented higher pH values, lower consistency and lower viscosity, and a flow behavior index similar to Newtonian fluids. Milder cold plasma conditions resulted in whey beverages with higher pH, lower viscosity and consistency, and similar particle distribution and microstructure compared to the pasteurized product. In contrast, more severe processing conditions resulted in a higher particle surface area ([D 3,2]) and smaller particles (~10 μM), due to the decrease in the number of larger particles (1000 μM), cell rupture, the formation of cell fragments, and higher viscosity and consistency. The treatments did not affect the thermal properties (enthalpy and bound water) of any sample.
Collapse
Affiliation(s)
- Marcello R Silveira
- Universidade Federal Fluminense (UFF), Faculdade de Medicina Veterinária, 24230-340 Niterói, Brazil
| | - Nathalia M Coutinho
- Universidade Federal Fluminense (UFF), Faculdade de Medicina Veterinária, 24230-340 Niterói, Brazil
| | - Ramon S Rocha
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil
| | - Jeremias Moraes
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil
| | - Erick A Esmerino
- Universidade Federal Rural do Rio de Janeiro (UFRRJ), Instituto de Tecnologia (IT), Seropédica 23890-000, Rio de Janeiro, Brazil
| | | | - Monica Q Freitas
- Universidade Federal Fluminense (UFF), Faculdade de Medicina Veterinária, 24230-340 Niterói, Brazil
| | - Marcia C Silva
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil
| | - Renata S L Raices
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil
| | - C Senaka Ranadheera
- The University of Melbourne, Faculty of Veterinary & Agricultural Sciences, School of Agriculture & Food, Melbourne, VIC 3010, Australia
| | - Fábio O Borges
- Universidade Federal Fluminense (UFF), Instituto de Física, 24210-340 Niteroi, Brazil
| | - Thatyane V Fonteles
- Universidade Federal do Ceará (UFC), Departamento de Engenharia de Alimentos, 60440-900 Fortaleza, Ceará, Brazil
| | - Roberto P C Neto
- Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Macromoléculas Professora Eloisa Mano (IMA), 21941-598 Rio de Janeiro, Brazil
| | - Maria Inês B Tavares
- Universidade Federal do Rio de Janeiro (UFRJ), Instituto de Macromoléculas Professora Eloisa Mano (IMA), 21941-598 Rio de Janeiro, Brazil
| | - Fabiano A N Fernandes
- Universidade Federal do Ceará (UFC), Departamento de Engenharia Química, 60440-900 Fortaleza, Ceará, Brazil
| | - Sueli Rodrigues
- Universidade Federal do Ceará (UFC), Departamento de Engenharia de Alimentos, 60440-900 Fortaleza, Ceará, Brazil
| | - Adriano G Cruz
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (IFRJ), Departamento de Alimentos, 20270-021 Rio de Janeiro, Brazil.
| |
Collapse
|
159
|
Kirsten N, Herberger K, Augustin M, Tigges W, Behrendt C, Heidemann F, Debus ES, Diener H. [Modern wound treatment-from best practice to innovation]. Chirurg 2018; 89:931-942. [PMID: 30242438 DOI: 10.1007/s00104-018-0731-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
According to the Research Group for Primary Medical Care (PMV), approximately 890,000 people in Germany were suffering from a chronic wound in 2012. This corresponds to a prevalence of 1.1%. Ulcus cruris, diabetic ulcers and decubital ulcers are among the most frequent causes of chronic wounds (57-80%). The guarantee for successful wound care is based on a good understanding of the physiology of the wound healing process. A disorder of the phase-like course can lead to complications, delays or suspension of wound healing. There are many reasons for pathological wound healing including infections, oxygen deficiency and non-phase-adapted wound care. In addition to established wound products, innovative products such as dermal matrixes, cold plasma therapy and platelet-rich plasma represent promising therapeutic alternatives for non-healing chronic wounds.
Collapse
Affiliation(s)
- N Kirsten
- Comprehensive Wound Center, Universitäres Herzzentrum Hamburg, Universitätsklinik Hamburg Eppendorf, Martinistraße 52, 20246, Hamburg, Deutschland
| | - K Herberger
- Comprehensive Wound Center, Universitäres Herzzentrum Hamburg, Universitätsklinik Hamburg Eppendorf, Martinistraße 52, 20246, Hamburg, Deutschland.,Institut für Versorgungsforschung Dermatologie, Universität Hamburg Eppendorf, Hamburg, Deutschland
| | - M Augustin
- Comprehensive Wound Center, Universitäres Herzzentrum Hamburg, Universitätsklinik Hamburg Eppendorf, Martinistraße 52, 20246, Hamburg, Deutschland.,Institut für Versorgungsforschung Dermatologie, Universität Hamburg Eppendorf, Hamburg, Deutschland
| | - W Tigges
- Klinik für Gefäßmedizin, AGAPLESION DIAKONIEKLINIKUM HAMBURG gGmbH, Hamburg, Deutschland
| | - C Behrendt
- Klinik und Poliklinik für Gefäßmedizin, Universitäres Herzzentrum Hamburg, UniversitätsklinikumHamburg-Eppendorf, Hamburg, Deutschland
| | - F Heidemann
- Klinik und Poliklinik für Gefäßmedizin, Universitäres Herzzentrum Hamburg, UniversitätsklinikumHamburg-Eppendorf, Hamburg, Deutschland
| | - E S Debus
- Klinik und Poliklinik für Gefäßmedizin, Universitäres Herzzentrum Hamburg, UniversitätsklinikumHamburg-Eppendorf, Hamburg, Deutschland.,Comprehensive Wound Center, Universitäres Herzzentrum Hamburg, Universitätsklinik Hamburg Eppendorf, Martinistraße 52, 20246, Hamburg, Deutschland
| | - H Diener
- Klinik und Poliklinik für Gefäßmedizin, Universitäres Herzzentrum Hamburg, UniversitätsklinikumHamburg-Eppendorf, Hamburg, Deutschland. .,Comprehensive Wound Center, Universitäres Herzzentrum Hamburg, Universitätsklinik Hamburg Eppendorf, Martinistraße 52, 20246, Hamburg, Deutschland.
| |
Collapse
|
160
|
Kleineidam B, Nokhbehsaim M, Deschner J, Wahl G. Effect of cold plasma on periodontal wound healing-an in vitro study. Clin Oral Investig 2018; 23:1941-1950. [PMID: 30232626 DOI: 10.1007/s00784-018-2643-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Accepted: 09/11/2018] [Indexed: 01/05/2023]
Abstract
OBJECTIVES Cold atmospheric plasma (CAP), a room temperate ionized gas, seems to be a possible way to enhance tissue recovery. An in vitro study was conducted to investigate the influence of medical CAP on the regenerative capacity of human periodontal ligament (PDL) cells. MATERIAL AND METHODS Human PDL cells were subjected to CAP at various intensities, distances, and durations. The effects of CAP on a number of specific markers were studied at transcriptional level using real-time PCR. Additionally, an in vitro wound healing assay was applied to PDL cell monolayers either in the presence or absence of CAP by using JuLI™ Br Live Cell Analyzer and software. Finally, cell viability of CAP-treated cells was analyzed by an XTT assay. RESULTS CAP treatment enhanced significantly the expression of the cytokines tumor necrosis factor (TNF)α, cyclooxygenase (COX)2, interleukin (IL)-1β, IL-6, IL-8, collagen (COL)1α, and matrix metalloproteinase (MMP)1, as well as the proliferation markers Ki67 and proliferating cell nuclear antigen (PCNA), but downregulated apoptotic markers Apaf1 and p53. Additionally, the in vitro wound healing rate was significantly enhanced after CAP application. Moreover, CAP treatment resulted in a significantly increased cell viability in the XTT assay. CONCLUSION This in vitro study shows that CAP has regulatable effects on markers of periodontal wound healing thereby underlining the potential use of CAP as a benefit treatment strategy. CLINICAL RELEVANCE Our study demonstrates the application of CAP in the treatment of oral pathologies suggesting a promising future treatment approach.
Collapse
Affiliation(s)
- Benedikt Kleineidam
- Department of Oral Surgery, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany.
| | - M Nokhbehsaim
- Section of Experimental Dento-Maxillo-Facial Medicine, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| | - J Deschner
- Department of Periodontology and Operative Dentistry, University Medical Center of the Johannes Gutenberg University, Augustusplatz 2, 55131, Mainz, Germany
| | - G Wahl
- Department of Oral Surgery, Center of Dento-Maxillo-Facial Medicine, University of Bonn, Welschnonnenstr. 17, 53111, Bonn, Germany
| |
Collapse
|
161
|
Stratakos AC, Grant IR. Evaluation of the efficacy of multiple physical, biological and natural antimicrobial interventions for control of pathogenic Escherichia coli on beef. Food Microbiol 2018; 76:209-218. [PMID: 30166143 DOI: 10.1016/j.fm.2018.05.011] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 05/23/2018] [Accepted: 05/25/2018] [Indexed: 12/26/2022]
Abstract
Antimicrobial effects of multiple physical, biological and natural interventions on pathogenic Escherichia coli in raw beef were assessed. A cocktail of E. coli strains was inoculated onto gamma-irradiated beef and enumerated immediately after each intervention and during storage at 4 °C for 7 days. Of the physical interventions, silver-containing antimicrobial packaging and ozone gas treatment did not show significant antimicrobial effects, however cold plasma treatment reduced E. coli levels by 0.9 and 1.82 log10 CFU/cm2 after 2 and 5 min treatments, respectively. A phage cocktail reduced E. coli counts by 0.63 and 1.16 log10 CFU/g after 24 h storage at 4 and 12 °C, respectively. Of the natural interventions, vinegar and lactic acid (5%) washes for 5 min caused reductions of ∼1 log10 CFU/g immediately after treatment, whereas lactoferrin and nisin treatments, separately or in combination, had insignificant antimicrobial effects. Nanoemulsions containing carvacrol or thyme essential oils caused immediate E. coli reductions of 1.41 and 1.36 log10 CFU/g, respectively, plus a progressive reduction in viable numbers during storage at 4 °C. Our findings suggest that cold plasma, bacteriophages, vinegar, lactic acid, or carvacrol and thyme essential oil nanoemulsions could potentially be of use to the beef industry for controlling pathogenic E. coli contamination.
Collapse
Affiliation(s)
- Alexandros Ch Stratakos
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, UK
| | - Irene R Grant
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, Belfast, UK.
| |
Collapse
|
162
|
Abstract
Cold plasma has emerged as a non-thermal technology for microbial inactivation in the food industry over the last decade. Spore-forming microorganisms pose challenges for microbiological safety and for the prevention of food spoilage. Inactivation of spores induced by cold plasma has been reported by several studies. However, the exact mechanism of spore deactivation by cold plasma is poorly understood; therefore, it is difficult to control this process and to optimize cold plasma processing for efficient spore inactivation. In this review, we summarize the factors that affect the resistance of spores to cold plasma, including processing parameters, environmental elements, and spore properties. We then describe possible inactivation targets in spore cells (e.g., outer structure, DNA, and metabolic proteins) that associated with inactivation by cold plasma according to previous studies. Kinetic models of the sporicidal activity of cold plasma have also been described here. A better understanding of the interaction between spores and cold plasma is essential for the development and optimization of cold plasma technology in food the industry.
Collapse
Affiliation(s)
- Xinyu Liao
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China.,Fuli Institute of Food Science, Zhejiang University , Hangzhou , China
| | - Aliyu Idris Muhammad
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China.,Department of Agricultural and Environmental Engineering, Faculty of Engineering, Bayero University Kano , Kano , Nigeria
| | - Shiguo Chen
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China
| | - Yaqin Hu
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China
| | - Xingqian Ye
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China
| | - Donghong Liu
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China.,Fuli Institute of Food Science, Zhejiang University , Hangzhou , China
| | - Tian Ding
- Department of Food Science and Nutrition, National Engineering Laboratory of Intelligent Food Technology and Equipment, Zhejiang University , Hangzhou , Zhejiang , China.,Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture, Zhejiang Key Laboratory for Agro-Food Processing , Hangzhou , Zhejiang , China.,Fuli Institute of Food Science, Zhejiang University , Hangzhou , China
| |
Collapse
|
163
|
Hertrich SM, Boyd G, Sites J, Niemira BA. Cold Plasma Inactivation of Salmonella in Prepackaged, Mixed Salads Is Influenced by Cross-Contamination Sequence. J Food Prot 2017; 80:2132-2136. [PMID: 29166173 DOI: 10.4315/0362-028x.jfp-17-242] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Customer demand for convenient food products has led to an increased production of prepackaged and ready-to-eat food products. Most of these products rely mainly on surface disinfection and other traditional approaches to ensure shelf life and safety. Novel processing techniques, such as cold plasma, are currently being investigated to enhance the safety and shelf life of prepacked foods. The purpose of this study was to determine the effects of cold plasma corona discharge on the inactivation of Salmonella on prepackaged, tomato-and-lettuce mixed salads. Two different inoculation methods were evaluated to address cross-contamination of Salmonella from cherry tomatoes to lettuce and vice versa. In separate studies, a sample of either cherry tomatoes (55 g) or romaine lettuce (10 g) was inoculated with a Salmonella cocktail (6.93 ± 0.99 log CFU/mL), placed into a commercial polyethylene terephthalate plastic container, and thoroughly mixed together with its noninoculated counterpart. Mixed salads were allowed to dry in a biosafety cabinet for 1 h. Samples were treated with 35 kV cold plasma corona discharge inside plastic containers for 3 min. Samples were stomached and serially diluted in buffered peptone water and then were plated onto aerobic plate count Petrifilm and incubated for 18 h at 37°C. When lettuce was the inoculated counterpart, log kill of Salmonella was significantly greater on tomatoes (0.75 log CFU/g) compared with lettuce (0.34 log CFU/g) (P = 0.0001). Salmonella was reduced on mixed salad only when lettuce was the inoculated counterpart (0.29 log CFU/g) (P = 0.002). Cold plasma can kill Salmonella in a prepackaged mixed salad, with efficacy dependent on the nature of contamination, direction of transfer, and the surface topography of the contaminated commodity.
Collapse
Affiliation(s)
- Sarah M Hertrich
- Food Safety and Intervention Technologies Unit, U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Glenn Boyd
- Food Safety and Intervention Technologies Unit, U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Joseph Sites
- Food Safety and Intervention Technologies Unit, U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Brendan A Niemira
- Food Safety and Intervention Technologies Unit, U.S. Department of Agriculture, Agricultural Research Service, Eastern Regional Research Center, 600 East Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| |
Collapse
|
164
|
Nomura Y, Takamatsu T, Kawano H, Miyahara H, Okino A, Yoshida M, Azuma T. Investigation of blood coagulation effect of nonthermal multigas plasma jet in vitro and in vivo. J Surg Res 2017; 219:302-9. [PMID: 29078897 DOI: 10.1016/j.jss.2017.06.055] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Revised: 05/17/2017] [Accepted: 06/16/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND Nonthermal atmospheric pressure plasma (NTAPP) has recently received attention as a novel tool in medicine. It is thought that plasma components yield plasma effects such as sterilization, blood coagulation, and wound healing. These effects are produced without thermal damage. We investigated the blood coagulation effect of NTAPP by using a multigas plasma jet. MATERIALS AND METHODS Multigas plasma jets can generate NTAPP by several gas species. In this study, argon, oxygen, helium, nitrogen, mock air, and carbon dioxide were used to generate NTAPP, and blood coagulation times were compared with each plasma-treated sample. The NTAPP blood coagulation effects on whole blood with four different anticoagulants were investigated. In addition, in this study, the effects of plasma treatment on porcine tissues and organs were investigated as in vivo experiment. RESULTS A tendency to coagulate later with argon gas plasma than others was shown. There were no significant differences between oxygen, helium, nitrogen, mock air, and carbon dioxide. Whole blood with each anticoagulant demonstrated fast coagulation by NTAPP treatment. Fast control of the bleeding lesions on porcine stomach and liver by plasma treatment was observed, and no tissue damage due to the plasma treatment was detected by optical microscope. CONCLUSIONS These experiments suggest the potential of various gas NTAPPs as a novel medical device to control bleeding lesions.
Collapse
|
165
|
Abstract
Plasma processing has been getting a lot of attention in recent applications as a novel, eco-friendly, and highly efficient approach. Cold plasma has mostly been used to reduce microbial counts in foodstuff and biological materials, as well as in different levels of packaging, particularly in cases where there is thermal sensitivity. As it is a very recent application, the impact of cold plasma treatment has been studied on the protein structures of food and pharmaceutical systems, as well as in the packaging industry. Proteins, as a food constituent, play a remarkable role in the techno-functional characteristics of processed foods and/or the physico-chemical properties of protein-based films. At the same time, some proteins are responsible for reduction in quality and nutritional value, and/or causing allergic reactions in the human body. This study is a review of the influences of different types of plasma on the conformation and function of proteins with food origin, especially enzymes and allergens, as well as protein-made packaging films. In enzyme manipulation with plasma, deactivation has been reported to be either partial or complete. In addition, an activity increase has been observed in some cases. These variations are caused by the effect of different active species of plasma on the enzyme structure and its function. The level and type of variations in the functional properties of food proteins, purified proteins in food, and plasma-treated protein films are affected by a number of control factors, including treatment power, time, and gas type, as well as the nature of the substance and the treatment environment.
Collapse
Affiliation(s)
- Haniye Tolouie
- a Department of Food Science and Technology , Shahid Beheshti University of Medical Science , Tehran , Iran
| | - Mohammad Amin Mohammadifar
- b Research Group for Food Production Engineering , National Food Institute, Technical University of Denmark, SøltoftsPlads , Kgs. Lyngby , Denmark
| | - Hamid Ghomi
- c Laser and Plasma Research Institute, Shahid Beheshti University, Evin , Tehran , Iran
| | - Maryam Hashemi
- d Microbial Biotechnology Department , Agricultural Biotechnology Research Institute of Iran (ABRII), AREEO, Agricultural Research, Education and Extension Organization (AREEO) , Karaj , Iran
| |
Collapse
|
166
|
Honarvar Z, Farhoodi M, Khani MR, Mohammadi A, Shokri B, Ferdowsi R, Shojaee-Aliabadi S. Application of cold plasma to develop carboxymethyl cellulose-coated polypropylene films containing essential oil. Carbohydr Polym 2017; 176:1-10. [PMID: 28927586 DOI: 10.1016/j.carbpol.2017.08.054] [Citation(s) in RCA: 59] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 07/20/2017] [Accepted: 08/10/2017] [Indexed: 11/26/2022]
Abstract
This study was aimed to develop and characterize carboxymethyl cellulose-coated polypropylene (PP/CMC) films with Zataria multiflora essential oil (ZEO) as a new antimicrobial food packaging. For better attachment of CMC on polypropylene (PP) film surface, atmospheric plasma pretreatment was used. Results showed the formation of polar groups such as CO and OH in the PP surface following the plasma treatment. Plasma-treated PP had rougher surfaces and their contact angle reduced from 88.92° to 52.15° indicating increased surface hydrophilicity. Plasma-treated PP/CMC films showed lower water vapor permeability (WVP) and higher tensile strength compared to untreated bilayer films. Results revealed that antimicrobial PP/CMC films with higher content of ZEO had lower WVP, but was more sensitive to breakage. Antimicrobial characteristics in the direct contact and vapor phase represented great inhibition for all the tested bacteria. Our findings suggest that plasma-treated PP/CMC films have the potential for application in food antimicrobial packaging.
Collapse
Affiliation(s)
- Zohreh Honarvar
- Students' Research Committee, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Farhoodi
- Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Reza Khani
- Department of Physics, Shahid Beheshti University, Tehran, Iran and Laser-Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Abdorreza Mohammadi
- Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Babak Shokri
- Department of Physics, Shahid Beheshti University, Tehran, Iran and Laser-Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Ruhollah Ferdowsi
- Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saeedeh Shojaee-Aliabadi
- Department of Food Science and Technology, National Nutrition and Food Technology Research Institute, Faculty of Nutrition Sciences and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| |
Collapse
|
167
|
Bhide S, Salvi D, Schaffner DW, Karwe MV. Effect of Surface Roughness in Model and Fresh Fruit Systems on Microbial Inactivation Efficacy of Cold Atmospheric Pressure Plasma. J Food Prot 2017; 80:1337-1346. [PMID: 28708029 DOI: 10.4315/0362-028x.jfp-17-064] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study investigates the efficacy of cold atmospheric pressure plasma (CAPP) on microbial inactivation as influenced by surface roughness of two types of surfaces: sandpaper and fresh fruit peel. Different grits of closed-coat sandpaper were selected, with their roughness (Pq) values ranging from 6 to 16 μm. Apple, orange, and cantaloupe peels were selected for roughness values that were similar to the sandpapers. The sandpapers and the fruit peel surfaces were spot inoculated with Enterobacter aerogenes (109 CFU/63.64 cm2) and exposed to CAPP for 492 s. Similar microbial enumeration techniques were used for both systems to quantify the microbial inactivation. The smoothest sandpaper showed a 0.52-log higher inactivation of E. aerogenes (2.08 log CFU/63.64 cm2 sandpaper surface inactivation) than did the roughest sandpaper (1.56 log CFU/63.64 cm2 sandpaper surface inactivation), and the difference was statistically significant (P < 0.05). The smoothest fresh fruit peel surface (apple) showed a 1.25-log higher inactivation of the microorganism (1.86 log CFU/63.64 cm2 fruit peel surface inactivation) than did the roughest fresh fruit peel surface (cantaloupe; 0.61 log CFU/63.64 cm2 fruit peel surface inactivation), and the difference was statistically significant (P < 0.05). As the surface roughness increased, microbial inactivation efficacy of CAPP decreased for both systems. The results from sandpaper show that, in a scenario in which the surface roughness was the only parameter of difference, the microbial inactivation efficacy of CAPP decreased with increasing surface roughness. The results from fruit surfaces show high variability and were not directly predictable from the sandpaper data. This suggests that the microbial inactivation efficacy of CAPP in real-world food systems, such as on fresh fruit peels, is affected by factors in addition to surface roughness.
Collapse
Affiliation(s)
- Siddharth Bhide
- Department of Food Science, Rutgers, State University of New Jersey, 65 Dudley Road, New Brunswick, New Jersey 08901, USA
| | - Deepti Salvi
- Department of Food Science, Rutgers, State University of New Jersey, 65 Dudley Road, New Brunswick, New Jersey 08901, USA
| | - Donald W Schaffner
- Department of Food Science, Rutgers, State University of New Jersey, 65 Dudley Road, New Brunswick, New Jersey 08901, USA
| | - Mukund V Karwe
- Department of Food Science, Rutgers, State University of New Jersey, 65 Dudley Road, New Brunswick, New Jersey 08901, USA
| |
Collapse
|
168
|
Min SC, Roh SH, Niemira BA, Boyd G, Sites JE, Uknalis J, Fan X. In-package inhibition of E. coli O157:H7 on bulk Romaine lettuce using cold plasma. Food Microbiol 2017; 65:1-6. [PMID: 28399991 DOI: 10.1016/j.fm.2017.01.010] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/24/2017] [Accepted: 01/24/2017] [Indexed: 11/28/2022]
Abstract
Dielectric barrier discharge atmospheric cold plasma (DACP) treatment was evaluated for the inactivation of Escherichia coli O157:H7, surface morphology, color, carbon dioxide generation, and weight loss of bulk Romaine lettuce in a commercial plastic clamshell container. The lettuce samples were packed in a model bulk packaging configuration (three rows with either 1, 3, 5, or 7 layers) in the container and treated by DACP (42.6 kV, 10 min). DACP treatment reduced the number of E. coli O157:H7 in the leaf samples in the 1-, 3-, and 5-layer configurations by 0.4-0.8 log CFU/g lettuce, with no significant correlation to the sample location (P > 0.05). In the largest bulk stacking with 7 layers, a greater degree of reduction (1.1 log CFU/g lettuce) was observed at the top layer, but shaking the container increased the uniformity of the inhibition. DACP did not significantly change the surface morphology, color, respiration rate, or weight loss of the samples, nor did these properties differ significantly according to their location in the bulk stack. DACP treatment inhibited E. coli O157:H7 on bulk lettuce in clamshell containers in a uniform manner, without affecting the physical and biological properties and thus holds promise as a post-packaging process for fresh and fresh-cut fruits and vegetables.
Collapse
Affiliation(s)
- Sea C Min
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA; Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | - Si Hyeon Roh
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA; Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | - Brendan A Niemira
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA.
| | - Glenn Boyd
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| | - Joseph E Sites
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| | - Joseph Uknalis
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| | - Xuetong Fan
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| |
Collapse
|
169
|
Shapira Y, Multanen V, Whyman G, Bormashenko Y, Chaniel G, Barkay Z, Bormashenko E. Plasma treatment switches the regime of wetting and floating of pepper seeds. Colloids Surf B Biointerfaces 2017. [PMID: 28633122 DOI: 10.1016/j.colsurfb.2017.06.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Cold radiofrequency plasma treatment modified wetting and floating regimes of pepper seeds. The wetting regime of plasma-treated seeds was switched from the Wenzel-like partial wetting to the complete wetting. No hydrophobic recovery following the plasma treatment was registered. Environmental scanning electron microscopy of the fine structure of the (three-phase) triple line observed with virgin and plasma-treated seeds is reported. Plasma treatment promoted rapid sinking of pepper seeds placed on the water/air interface. Plasma treatment did not influence the surface topography of pepper seeds, while charged them electrically. Electrostatic repulsion of floating plasma-treated seeds was observed. The surface charge density was estimated from the data extracted from floating of charged seeds and independently with the electrostatic pendulum as σ≈1-2μC/m2.
Collapse
Affiliation(s)
- Yekaterina Shapira
- Ariel University, Engineering Faculty, Department of Chemical Engineering, Biotechnology and Materials, 407000, P.O.B. 3, Ariel, Israel
| | - Victor Multanen
- Ariel University, Engineering Faculty, Department of Chemical Engineering, Biotechnology and Materials, 407000, P.O.B. 3, Ariel, Israel
| | - Gene Whyman
- Ariel University, Natural Sciences Faculty, Physics Department, 407000, P.O.B. 3, Ariel, Israel
| | - Yelena Bormashenko
- Ariel University, Engineering Faculty, Department of Chemical Engineering, Biotechnology and Materials, 407000, P.O.B. 3, Ariel, Israel
| | - Gilad Chaniel
- Ariel University, Natural Sciences Faculty, Physics Department, 407000, P.O.B. 3, Ariel, Israel
| | - Zahava Barkay
- Wolfson Applied Materials Research Center, Tel Aviv University, Ramat-Aviv, 69978, Israel
| | - Edward Bormashenko
- Ariel University, Engineering Faculty, Department of Chemical Engineering, Biotechnology and Materials, 407000, P.O.B. 3, Ariel, Israel.
| |
Collapse
|
170
|
Liao X, Xiang Q, Liu D, Chen S, Ye X, Ding T. Lethal and Sublethal Effect of a Dielectric Barrier Discharge Atmospheric Cold Plasma on Staphylococcus aureus. J Food Prot 2017; 80:928-932. [PMID: 28459615 DOI: 10.4315/0362-028x.jfp-16-499] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The lethal and sublethal effect of a dielectric barrier discharge atmospheric cold plasma on Staphylococcus aureus were investigated by nonselective and selective media. The inactivation level and sublethally injured proportions of S. aureus cells by dielectric barrier discharge atmospheric cold plasma depended on the treatment times (0, 5, 15, and 45 s), applied input powers (40, 50, and 60 W), and gap distances (2, 4, and 6 mm). Under weak conditions (e.g., 5 s, 40 W, and 6 mm), the occurrence of inactivation and sublethal injury of S. aureus showed a relatively low level. Strong treatment (e.g., 45 s, 60 W, and 2 mm) resulted in highly an inactivated rate, but with small fractions of sublethally injured S. aureus cells. Mild action of cold plasma induced both a large inactivation and a sublethal injury of S. aureus . Therefore, it is significant to optimize the processing of cold plasma sterilization in practice to ensure food safety.
Collapse
Affiliation(s)
- Xinyu Liao
- 1 Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Qisen Xiang
- 2 College of Food and Biological Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People's Republic of China
| | - Donghong Liu
- 1 Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Shiguo Chen
- 1 Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Xingqian Ye
- 1 Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| | - Tian Ding
- 1 Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang 310058, People's Republic of China
| |
Collapse
|
171
|
Kim HS, Min SC. Effects of microwave-discharged cold plasma on synthesis and characteristics of citrate derivatives of corn starch granules. Food Sci Biotechnol 2017; 26:697-706. [PMID: 30263594 DOI: 10.1007/s10068-017-0110-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Revised: 02/22/2017] [Accepted: 02/27/2017] [Indexed: 11/26/2022] Open
Abstract
The objectives of this study were to identify the potential function of microwave-discharged cold plasma (MCP) treatment in preparing starch citrate (SC) non-thermally and to investigate the physicochemical properties of MCP-induced starch citrates. SCs were prepared by either dry heating in a convection oven (as a reaction control; COV) or MCP treatment using N2 (N2-MCP) and N2-O2 (N2/O2-MCP). Fourier transform-infrared spectra of the MCP-induced SCs revealed new peaks indicating ester bonds. The molar degree of substation was 0.013-0.015 depending on the reaction conditions. The plasma-formed dents were observed more on the surfaces of granular starch citrates (GSCs) treated with N2/O2-MCP than N2-MCP. Relative to COV, MCP-induced GSCs possessed lower resistant starch content, solubility, and gelatinization temperatures and higher swelling power. The pasting viscosities were higher with N2-MCP GSCs and lower with N2/O2-MCP GSCs. The results suggest that MCP can be used as a novel catalyst for non-thermal starch citration.
Collapse
Affiliation(s)
- Hyun-Seok Kim
- 1Department of Food Science and Biotechnology, Kyonggi University, Suwon, Gyeonggi 16227 Korea
| | - Sea Cheol Min
- 2Department of Food Science and Technology, Seoul Women's University, Seoul, 01797 Korea
| |
Collapse
|
172
|
Amini M, Ghoranneviss M, Abdijadid S. Effect of cold plasma on crocin esters and volatile compounds of saffron. Food Chem 2017; 235:290-293. [PMID: 28554638 DOI: 10.1016/j.foodchem.2017.05.067] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 04/26/2017] [Accepted: 05/14/2017] [Indexed: 10/19/2022]
Abstract
The effect of cold plasma on crocin esters and volatile oils of saffron was studied for the first time. After the treatments, (Ar, Ar/5% O2 and Ar/10% O2 at 8 and 12kV of voltage), a decrease in crocin esters and saffranal and an increase in isophorone and 4-ketoisophorone was observed. After 4min, the saffron samples treated with Ar/20% O2 had blackened and the treatment was discontinued. The results show that increasing the input voltage and increasing the amount of added oxygen to Argon gas increased the changes in the safranal and crocin esters. There was no trans-2G, cis-4GG or cis-3Gg compounds observed after the Ar/10% O2 cold plasma treatment at 12kV.
Collapse
Affiliation(s)
- Maryam Amini
- Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran.
| | - Mahmood Ghoranneviss
- Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Sara Abdijadid
- Intellectual and Developmental Disabilities Research Center, University of California Los Angeles, Los Angeles, CA, USA
| |
Collapse
|
173
|
Oh YJ, Song AY, Min SC. Inhibition of Salmonella typhimurium on radish sprouts using nitrogen- cold plasma. Int J Food Microbiol 2017; 249:66-71. [PMID: 28319800 DOI: 10.1016/j.ijfoodmicro.2017.03.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Revised: 02/27/2017] [Accepted: 03/09/2017] [Indexed: 10/20/2022]
Abstract
This study investigated the effects of cold plasma treatment (CPT) on the inhibition of Salmonella typhimurium on radish sprouts and the quality attributes of the sprouts. Radish sprouts were treated with nitrogen (N2)-cold plasma at 900W and 667Pa for 0, 2, 5, 10, and 20min using a microwave-powered CPT system. The sensory attributes of the radish sprouts, appearance and odor, were evaluated before and after the treatment. The effects of N2-CPT for 10min on microbial growth and the quality attributes of the radish sprouts were evaluated during storage for 12days at 4 and 10°C. N2-CPT at 900W and 667Pa for 20min reduced the number of S. typhimurium by 2.6±0.4logCFU/g. The moisture content of the radish sprouts decreased with treatment time. The appearance and odor of the radish sprouts were not altered by CPT (p>0.05) and this treatment did not affect the quality attributes of the sprouts in terms of color, ascorbic acid concentration, or antioxidant activity during storage at both 4 and 10°C. These findings suggest that CPT has the potential to improve the microbiological safety of radish sprouts with reference to S. typhimurium during cold storage without significant detriment to its quality properties.
Collapse
Affiliation(s)
- Yeong Ji Oh
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - A Young Song
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea
| | - Sea C Min
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 01797, Republic of Korea.
| |
Collapse
|
174
|
Min SC, Roh SH, Boyd G, Sites JE, Uknalis J, Fan X, Niemira BA. Inactivation of Escherichia coli O157:H7 and Aerobic Microorganisms in Romaine Lettuce Packaged in a Commercial Polyethylene Terephthalate Container Using Atmospheric Cold Plasma. J Food Prot 2017; 80:35-43. [PMID: 28221875 DOI: 10.4315/0362-028x.jfp-16-148] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The effects of dielectric barrier discharge atmospheric cold plasma (DACP) treatment on the inactivation of Escherichia coli O157:H7 and aerobic microorganisms in romaine lettuce packaged in a conventional commercial plastic container were evaluated during storage at 4°C for 7 days. Effects investigated included the color, carbon dioxide (CO2) generation, weight loss, and surface morphology of the lettuce during storage. Romaine lettuce pieces, with or without inoculation with a cocktail of three strains of E. coli O157:H7 (~6 log CFU/g of lettuce), were packaged in a polyethylene terephthalate commercial clamshell container and treated at 34.8 kV at 1.1 kHz for 5 min by using a DACP treatment system equipped with a pin-type high-voltage electrode. Romaine lettuce samples were analyzed for inactivation of E. coli O157:H7, total mesophilic aerobes, and yeasts and molds, color, CO2 generation, weight loss, and surface morphology during storage at 4°C for 7 days. The DACP treatment reduced the initial counts of E. coli O157:H7 and total aerobic microorganisms by ~1 log CFU/g, with negligible temperature change from 24.5 ± 1.4°C to 26.6 ± 1.7°C. The reductions in the numbers of E. coli O157:H7, total mesophilic aerobes, and yeasts and molds during storage were 0.8 to 1.5, 0.7 to 1.9, and 0.9 to 1.7 log CFU/g, respectively. DACP treatment, however, did not significantly affect the color, CO2 generation, weight, and surface morphology of lettuce during storage (P > 0.05). Some mesophilic aerobic bacteria were sublethally injured by DACP treatment. The results from this study demonstrate the potential of applying DACP as a postpackaging treatment to decontaminate lettuce contained in conventional plastic packages without altering color and leaf respiration during posttreatment cold storage.
Collapse
Affiliation(s)
- Sea C Min
- U.S. Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | - Si Hyeon Roh
- U.S. Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | - Glenn Boyd
- U.S. Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Joseph E Sites
- U.S. Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Joseph Uknalis
- U.S. Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Xuetong Fan
- U.S. Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| | - Brendan A Niemira
- U.S. Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, Pennsylvania 19038, USA
| |
Collapse
|
175
|
Min SC, Roh SH, Niemira BA, Sites JE, Boyd G, Lacombe A. Dielectric barrier discharge atmospheric cold plasma inhibits Escherichia coli O157:H7, Salmonella, Listeria monocytogenes, and Tulane virus in Romaine lettuce. Int J Food Microbiol 2016; 237:114-120. [PMID: 27562348 DOI: 10.1016/j.ijfoodmicro.2016.08.025] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 07/29/2016] [Accepted: 08/15/2016] [Indexed: 10/21/2022]
Abstract
The present study investigated the effects of dielectric barrier discharge atmospheric cold plasma (DACP) treatment on the inactivation of Escherichia coli O157:H7, Salmonella, Listeria monocytogenes, and Tulane virus (TV) on Romaine lettuce, assessing the influences of moisture vaporization, modified atmospheric packaging (MAP), and post-treatment storage on the inactivation of these pathogens. Romaine lettuce was inoculated with E. coli O157:H7, Salmonella, L. monocytogenes (~6logCFU/g lettuce), or TV (~2logPFU/g lettuce) and packaged in either a Petri dish (diameter: 150mm, height: 15mm) or a Nylon/polyethylene pouch (152×254mm) with and without moisture vaporization. Additionally, a subset of pouch-packaged leaves was flushed with O2 at 5% or 10% (balance N2). All of the packaged lettuce samples were treated with DACP at 34.8kV for 5min and then analyzed either immediately or following post-treatment storage for 24h at 4°C to assess the inhibition of microorganisms. DACP treatment inhibited E. coli O157:H7, Salmonella, L. monocytogenes, and TV by 1.1±0.4, 0.4±0.3, 1.0±0.5logCFU/g, and 1.3±0.1logPFU/g, respectively, without environmental modifications of moisture or gas in the packages. The inhibition of the bacteria was not significantly affected by packaging type or moisture vaporization (p>0.05) but a reduced-oxygen MAP gas composition attenuated the inhibition rates of E. coli O157:H7 and TV. L. monocytogenes continued to decline by an additional 0.6logCFU/g in post-treatment cold storage for 24h. Additionally, both rigid and flexible conventional plastic packages appear to be suitable for the in-package decontamination of lettuce with DACP.
Collapse
Affiliation(s)
- Sea C Min
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA; Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | - Si Hyeon Roh
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA; Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | - Brendan A Niemira
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA.
| | - Joseph E Sites
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| | - Glenn Boyd
- United States Department of Agriculture, Eastern Regional Research Center, 600 Mermaid Lane, Wyndmoor, PA 19038, USA
| | - Alison Lacombe
- National College of Natural Medicine, 014 SE Porter St., Portland, OR 97201, USA
| |
Collapse
|
176
|
Mohd Nasir N, Lee BK, Yap SS, Thong KL, Yap SL. Cold plasma inactivation of chronic wound bacteria. Arch Biochem Biophys 2016; 605:76-85. [PMID: 27046340 DOI: 10.1016/j.abb.2016.03.033] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2016] [Revised: 03/20/2016] [Accepted: 03/30/2016] [Indexed: 10/22/2022]
Abstract
Cold plasma is partly ionized non-thermal plasma generated at atmospheric pressure. It has been recognized as an alternative approach in medicine for sterilization of wounds, promotion of wound healing, topical treatment of skin diseases with microbial involvement and treatment of cancer. Cold plasma used in wound therapy inhibits microbes in chronic wound due to its antiseptic effects, while promoting healing by stimulation of cell proliferation and migration of wound relating skin cells. In this study, two types of plasma systems are employed to generate cold plasma: a parallel plate dielectric barrier discharge and a capillary-guided corona discharge. Parameters such as applied voltage, discharge frequency, treatment time and the flow of the carrier gas influence the cold plasma chemistry and therefore change the composition and concentration of plasma species that react with the target sample. Chronic wound that fails to heal often infected by multidrug resistant organisms makes them recalcitrant to healing. Methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa (Pseudomonas aeruginosa) are two common bacteria in infected and clinically non-infected wounds. The efficacies of the cold plasma generated by the two designs on the inactivation of three different isolates of MRSA and four isolates of P. aeruginosa are reported here.
Collapse
Affiliation(s)
- N Mohd Nasir
- Plasma Research Laboratory, Department of Physics, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - B K Lee
- Plasma Research Laboratory, Department of Physics, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - S S Yap
- Faculty of Engineering, Multimedia University, Cyberjaya, 63100, Selangor, Malaysia
| | - K L Thong
- Institute of Biological Sciences, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - S L Yap
- Plasma Research Laboratory, Department of Physics, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| |
Collapse
|
177
|
Kaushik NK, Kaushik N, Yoo KC, Uddin N, Kim JS, Lee SJ, Choi EH. Low doses of PEG-coated gold nanoparticles sensitize solid tumors to cold plasma by blocking the PI3K/AKT-driven signaling axis to suppress cellular transformation by inhibiting growth and EMT. Biomaterials 2016; 87:118-130. [PMID: 26921841 DOI: 10.1016/j.biomaterials.2016.02.014] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Revised: 01/31/2016] [Accepted: 02/15/2016] [Indexed: 12/30/2022]
Abstract
Metastasis, the primary cause of tumor cell transformation, is often activated during cancer invasion and progression and is associated with poor therapeutic outcomes. The effects of combined treatments that included PEG-coated gold nanoparticles (GNP) and cold plasma on epithelial-mesenchymal transition (EMT) and the maintenance of cancer stem cells (CSC) have not been described so far. Here, we report that co-treatment with GNP and cold plasma inhibited proliferation in cancer cells by abolishing the activation of the PI3K/AKT signaling axis. In addition, co-treatment reversed EMT in solid tumor cells by reducing the secretion of a number of proteins, resulting in the upregulation of epithelial markers such as E-cadherin along with down-regulation of N-Cadherin, Slug and Zeb-1. The inhibition of the PI3K/AKT pathway and the reversal of EMT by co-treatment prevented tumor cells growth in solid tumors. Furthermore, we show that GNP and plasma also suppresses tumor growth by decreasing mesenchymal markers in tumor xenograft mice models. Importantly, co-treatment resulted in a substantial decrease in sphere formation and the self-renewal capacity of glioma-like stem cells. Together, these results indicate a direct link between a decrease of EMT and an increase in cell death in solid tumors following co-treatment with cold plasma and GNP.
Collapse
Affiliation(s)
- Nagendra Kumar Kaushik
- Plasma Bioscience Research Center, Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 139-701, Republic of Korea.
| | - Neha Kaushik
- Plasma Bioscience Research Center, Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 139-701, Republic of Korea; Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, 133-791, Republic of Korea
| | - Ki Chun Yoo
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, 133-791, Republic of Korea
| | - Nizam Uddin
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, 133-791, Republic of Korea
| | - Ju Sung Kim
- Plasma Bioscience Research Center, Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 139-701, Republic of Korea
| | - Su Jae Lee
- Department of Life Science, Research Institute for Natural Sciences, Hanyang University, Seoul, 133-791, Republic of Korea.
| | - Eun Ha Choi
- Plasma Bioscience Research Center, Department of Electrical and Biological Physics, Kwangwoon University, Seoul, 139-701, Republic of Korea.
| |
Collapse
|
178
|
Bahrami N, Bayliss D, Chope G, Penson S, Perehinec T, Fisk ID. Cold plasma: A new technology to modify wheat flour functionality. Food Chem 2016; 202:247-53. [PMID: 26920291 PMCID: PMC4778607 DOI: 10.1016/j.foodchem.2016.01.113] [Citation(s) in RCA: 86] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Revised: 01/22/2016] [Accepted: 01/27/2016] [Indexed: 11/28/2022]
Abstract
Wheat flour was treated with low levels of cold plasma. Cold plasma treatment did not impact microflora. Cold plasma treatment altered the molecular weight distribution of wheat protein polymers. Cold plasma treatment oxidised free fatty acids and phospholipids. Wheat flour subjected to cold plasma treatment produced a stronger dough.
Atmospheric pressure cold plasma has the potential to modify biological chemistry and modulate physical surface properties. Wheat flour was treated by low levels of cold plasma (air, 15 V and 20 V) for 60 or 120 s. There was no change in the total aerobic bacterial count or total mould count as a result of treatment. Treatment did not impact the concentration of total non-starch lipids, or non-polar and glycolipids. However, treatment did reduce total free fatty acids and phospholipids and was dose dependent. Oxidation markers (hydroperoxide value and head space n-hexanal) increased with treatment time and voltage, which confirmed the acceleration of lipid oxidation. Total proteins were not significantly influenced by treatment although there was a trend towards higher molecular weight fractions which indicated protein oxidation and treated flour did produce a stronger dough. This study confirms the potential of cold plasma as a tool to modify flour functionality.
Collapse
Affiliation(s)
- Niloufar Bahrami
- The University of Nottingham, Division of Food Sciences, School of Bioscience, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Danny Bayliss
- Campden BRI, Station Road, Chipping Campden, Gloucestershire GL55 6LD, UK
| | - Gemma Chope
- Campden BRI, Station Road, Chipping Campden, Gloucestershire GL55 6LD, UK
| | - Simon Penson
- Campden BRI, Station Road, Chipping Campden, Gloucestershire GL55 6LD, UK
| | - Tania Perehinec
- The University of Nottingham, Division of Food Sciences, School of Bioscience, Sutton Bonington Campus, Loughborough LE12 5RD, UK
| | - Ian D Fisk
- The University of Nottingham, Division of Food Sciences, School of Bioscience, Sutton Bonington Campus, Loughborough LE12 5RD, UK.
| |
Collapse
|
179
|
Herbst SR, Hertel M, Ballout H, Pierdzioch P, Weltmann KD, Wirtz HC, Abu-Sirhan S, Kostka E, Paris S, Preissner S. Bactericidal Efficacy of Cold Plasma at Different Depths of Infected Root Canals In Vitro. Open Dent J 2015; 9:486-91. [PMID: 26962378 PMCID: PMC4768658 DOI: 10.2174/1874210601509010486] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 11/03/2015] [Accepted: 11/06/2015] [Indexed: 11/27/2022] Open
Abstract
Objectives: Cold plasma (CP) has been shown to be effective even against multiresistant microorganisms. As previous investigations on the effect of CP in root canals showed promising results, the aim of the present study was to analyze the bactericidal efficacy of CP in different depths of infected dentin. Methods: 32 standardized root canals of human mandibular premolars were infected with Enterococcus faecalis and incubated for one week. Specimens were randomly selected for one of four disinfection methods: control (5mL NaCl), 5mL chlorhexidine (CHX), CP alone (CP), and a combination of 5mL CHX and cold plasma (CHX+CP). CHX was ultrasonically activated for 30s, while cold plasma was used for 60s in the root canals. Dentin samples at depths of 300, 500 and 800 µm were obtained and diluted serially. Colony forming units (CFUs) were counted on agar plates after 24h of incubation. Results: The highest overall logarithmic reduction factors (RF) were obtained from CHX+CP (log RF 3.56 p<0.01; Mann-Whitney U test), followed by CP (log RF 3.27 p<0.01) and CHX alone (log RF 2.65 p<0.01) related to the control. All disinfection methods showed significantly lower CFU counts compared to the control group in 300 µm and 800 µm (both p<0.01, Kruskal-Wallis test). Discussion: The adjuvant use of CP might be beneficial in highly infected root canals to improved disinfection. However, the disinfection effect against Enterococcus faecalis of CP is comparable to ultrasonically activated CHX.
Collapse
Affiliation(s)
- Sascha R Herbst
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Moritz Hertel
- Charité - Universitätsmedizin Berlin, Department of Oral Medicine, Dental Radiology and Oral Surgery, Germany
| | - Husam Ballout
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Philipp Pierdzioch
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Klaus-Dieter Weltmann
- INP Greifswald, Leibniz Institute for Plasma Science and Technology, Greifswald, Germany
| | - Henrik C Wirtz
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Shady Abu-Sirhan
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Eckehard Kostka
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Sebastian Paris
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| | - Saskia Preissner
- Charité - Universitätsmedizin Berlin, Department of Operative and Preventive Dentistry, Germany
| |
Collapse
|
180
|
Lee H, Kim JE, Chung MS, Min SC. Cold plasma treatment for the microbiological safety of cabbage, lettuce, and dried figs. Food Microbiol 2015; 51:74-80. [PMID: 26187830 DOI: 10.1016/j.fm.2015.05.004] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2014] [Revised: 04/28/2015] [Accepted: 05/01/2015] [Indexed: 10/23/2022]
Abstract
Microwave-powered cold plasma treatment (CPT) was evaluated as a means to improve the microbiological safety of fresh vegetables and dried fruits. The CPT at 900 W, conducted for 10 min using nitrogen as a plasma-forming gas, inactivated Salmonella Typhimurium inoculated on cabbage and lettuce by approximately 1.5 log CFU/g. The CPT at 400-900 W and 667 Pa, conducted for 1-10 min using a helium-oxygen gas mixture, inactivated Listeria monocytogenes on cabbage by 0.3-2.1 log CFU/g in a time-dependent manner (P < 0.05). The Weibull model adequately described the inactivation of L. monocytogenes on cabbage by CPT. The CPT at the optimum conditions of treatment power (400 W) and time (10 min) inactivated L. monocytogenes on lettuce by 1.8 ± 0.2 log CFU/g. As the water activity of the dried figs increased from 0.70 to 0.93, the reductions in numbers of Escherichia coli O157:H7 and L. monocytogenes on figs increased from 0.5 to 1.3 log CFU/g and from 1.0 to 1.6 log CFU/g, respectively. The microbial inactivation by CPT increased synergistically when the pH of the figs was reduced from 6 to 4. CTPs have potential application to increase the microbiological safety of vegetables and dried fruits.
Collapse
Affiliation(s)
- Hanna Lee
- Department of Food Science and Technology, Seoul Women's University, Seoul, 139-774, Republic of Korea
| | - Jung Eun Kim
- Department of Food Science and Technology, Seoul Women's University, Seoul, 139-774, Republic of Korea
| | - Myong-Soo Chung
- Department of Food Science and Engineering, Ewha Womans University, Seoul, 120-750, Republic of Korea
| | - Sea C Min
- Department of Food Science and Technology, Seoul Women's University, Seoul, 139-774, Republic of Korea.
| |
Collapse
|
181
|
Li Y, Sun K, Ye G, Liang Y, Pan H, Wang G, Zhao Y, Pan J, Zhang J, Fang J. Evaluation of Cold Plasma Treatment and Safety in Disinfecting 3-week Root Canal Enterococcus faecalis Biofilm In Vitro. J Endod 2015; 41:1325-30. [PMID: 26027875 DOI: 10.1016/j.joen.2014.10.020] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 10/20/2014] [Accepted: 10/22/2014] [Indexed: 11/30/2022]
Abstract
INTRODUCTION Although endodontic infection is caused by multi-bacteria species, Enterococcus faecalis is usually isolated in chronic apical periodontitis. The aim of this study was to evaluate the effectiveness and mechanical safety of cold plasma therapy in disinfecting 3-week E. faecalis biofilms. METHODS Teeth with 3-week E. faecalis biofilm were treated with AC argon/oxygen (Ar/O2) cold plasma for various treatment times and compared with those treated with Ca(OH)2, 2% chlorhexidine gel, and Ca(OH)2/chlorhexidine for a week. Antimicrobial efficacy was assessed by colony-forming unit method. Scanning electron microscopy was used to assess the morphologic changes of E. faecalis biofilm by plasma. Confocal laser scanning microscopy was used to confirm the viability of the biofilm after the plasma treatment. Microhardness and roughness changes of root canal dentin caused by plasma were verified with Vickers Hardness Tester and 3D Profile Measurement Laser Microscope, respectively. RESULTS There were no detectable live bacteria after 12 minutes of cold plasma treatment. This was further confirmed by scanning electron microscopy and confocal laser scanning microscopy results. Microhardness and roughness of root canal dentin showed no significant difference after plasma treatment. CONCLUSIONS Atmospheric pressure cold plasma is an effective therapy in endodontics for its strong sterilization effect on fully matured biofilm within a few minutes. Meanwhile, it has an accepted mechanical safety for its low temperature and not affecting the microhardness and roughness of root canal dentin significantly.
Collapse
Affiliation(s)
- Yinglong Li
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Ke Sun
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Guopin Ye
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Yongdong Liang
- College of Engineering, Peking University, Beijing, China
| | - Hong Pan
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Guomin Wang
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China
| | - Yijiao Zhao
- National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing, China
| | - Jie Pan
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China; Department of General Dentistry, Peking University School and Hospital of Stomatology, Beijing, China.
| | - Jue Zhang
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China; College of Engineering, Peking University, Beijing, China
| | - Jing Fang
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, China; College of Engineering, Peking University, Beijing, China
| |
Collapse
|
182
|
Bormashenko E, Whyman G, Multanen V, Shulzinger E, Chaniel G. Physical mechanisms of interaction of cold plasma with polymer surfaces. J Colloid Interface Sci 2015; 448:175-9. [PMID: 25733393 DOI: 10.1016/j.jcis.2015.02.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Revised: 02/08/2015] [Accepted: 02/08/2015] [Indexed: 11/26/2022]
Abstract
Physical mechanisms of the interaction of cold plasmas with organic surfaces are discussed. Trapping of plasma ions by the CH2 groups of polymer surfaces resulting in their electrical charging is treated. Polyethylene surfaces were exposed to the cold radiofrequency air plasma for different intervals of time. The change in the wettability of these surfaces was registered. The experimentally established characteristic time scales of the interaction of cold plasma with polymer surfaces are inversely proportional to the concentration of ions. The phenomenological kinetic model of the electrical charging of polymer surfaces by plasmas is introduced and analyzed.
Collapse
Affiliation(s)
- Edward Bormashenko
- Ariel University, Physics Faculty, P.O.B. 3, 40700 Ariel, Israel; Ariel University, Chemical Engineering and Biotechnology Faculty, P.O.B. 3, 40700 Ariel, Israel.
| | - Gene Whyman
- Ariel University, Physics Faculty, P.O.B. 3, 40700 Ariel, Israel
| | - Victor Multanen
- Ariel University, Chemical Engineering and Biotechnology Faculty, P.O.B. 3, 40700 Ariel, Israel
| | | | - Gilad Chaniel
- Ariel University, Physics Faculty, P.O.B. 3, 40700 Ariel, Israel; Bar Ilan University, Physics Faculty, 52900 Ramat Gan, Israel
| |
Collapse
|
183
|
Heuer K, Hoffmanns MA, Demir E, Baldus S, Volkmar CM, Röhle M, Fuchs PC, Awakowicz P, Suschek CV, Opländer C. The topical use of non-thermal dielectric barrier discharge (DBD): nitric oxide related effects on human skin. Nitric Oxide 2014; 44:52-60. [PMID: 25435001 DOI: 10.1016/j.niox.2014.11.015] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2014] [Revised: 11/14/2014] [Accepted: 11/25/2014] [Indexed: 11/17/2022]
Abstract
Dielectric barrier discharge (DBD) devices generate air plasma above the skin containing active and reactive species including nitric oxide (NO). Since NO plays an essential role in skin physiology, a topical application of NO by plasma may be useful in the treatment of skin infections, impaired microcirculation and wound healing. Thus, after safety assessments of plasma treatment using human skin specimen and substitutes, NO-penetration through the epidermis, the loading of skin tissue with NO-derivates in vitro and the effects on human skin in vivo were determined. After the plasma treatment (0-60 min) of skin specimen or reconstructed epidermis no damaging effects were found (TUNEL/MTT). By Franz diffusion cell experiments plasma-induced NO penetration through epidermis and dermal enrichment with NO related species (nitrite 6-fold, nitrate 7-fold, nitrosothiols 30-fold) were observed. Furthermore, skin surface was acidified (~pH 2.7) by plasma treatment (90 s). Plasma application on the forearms of volunteers increased microcirculation fourfold in 1-2 mm and twofold in 6-8 mm depth in the treated skin areas. Regarding the NO-loading effects, skin acidification and increase in dermal microcirculation, plasma devices represent promising tools against chronic/infected wounds. However, efficacy of plasma treatment needs to be quantified in further studies and clinical trials.
Collapse
Affiliation(s)
- Kiara Heuer
- Department of Trauma and Hand Surgery, Medical Faculty, Heinrich-Heine-University Düsseldorf, Germany
| | - Martin A Hoffmanns
- Department of Trauma and Hand Surgery, Medical Faculty, Heinrich-Heine-University Düsseldorf, Germany
| | - Erhan Demir
- Department of Plastic Surgery, Hand Surgery, Burn Center, Merheim Hospital Cologne, University of Witten/Herdecke, Germany
| | - Sabrina Baldus
- Institute for Electrical Engineering and Plasma Technology, Ruhr University, Bochum, Germany
| | - Christine M Volkmar
- Department of Trauma and Hand Surgery, Medical Faculty, Heinrich-Heine-University Düsseldorf, Germany
| | - Mirco Röhle
- Department of Trauma and Hand Surgery, Medical Faculty, Heinrich-Heine-University Düsseldorf, Germany
| | - Paul C Fuchs
- Department of Plastic Surgery, Hand Surgery, Burn Center, Merheim Hospital Cologne, University of Witten/Herdecke, Germany
| | - Peter Awakowicz
- Institute for Electrical Engineering and Plasma Technology, Ruhr University, Bochum, Germany
| | - Christoph V Suschek
- Department of Trauma and Hand Surgery, Medical Faculty, Heinrich-Heine-University Düsseldorf, Germany
| | - Christian Opländer
- Department of Trauma and Hand Surgery, Medical Faculty, Heinrich-Heine-University Düsseldorf, Germany.
| |
Collapse
|
184
|
Ulbin-Figlewicz N, Jarmoluk A, Marycz K. Antimicrobial activity of low-pressure plasma treatment against selected foodborne bacteria and meat microbiota. ANN MICROBIOL 2014; 65:1537-1546. [PMID: 26273240 PMCID: PMC4529465 DOI: 10.1007/s13213-014-0992-y] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 09/29/2014] [Indexed: 11/25/2022] Open
Abstract
The effects of helium and argon plasma treatments on inactivation of both pure bacterial cultures inoculated onto the surface of agarized media and the surface microbiota of meat were investigated. Cold plasmas were generated by high voltage discharge at low pressure (20 kPa) for 2, 5, and 10 min. The number of viable microorganisms was determined using a plate count method. Morphological changes were observed using scanning electron microscopy (SEM). Microbial log reduction depended on time of exposure and type of gas used. After a 10-min treatment with helium plasma, the total number of microorganisms, yeasts and molds, and psychrotrophic microorganisms was reduced in the range of 1.14-1.48 log cycles for pork and 0.98-2.09 log cycles for beef. A significant reduction of 2.00 log for Bacillus subtilis and Yersinia enterocolitica was achieved within 2 min of helium plasma treatment. Similar results were obtained for Staphylococcus aureus, Escherichia coli and Pseudomonas fluorescens after 5 min and 10 min of exposure. SEM revealed disruption and lysis of E. coli cells treated with helium plasma for 10 min, suggesting a bactericidal effect.
Collapse
Affiliation(s)
- Natalia Ulbin-Figlewicz
- Department of Animal Products Technology and Quality Management, Wrocław University of Environmental and Life Sciences, ul. Chełmońskiego 37/41, 51-630 Wrocław, Poland
| | - Andrzej Jarmoluk
- Department of Animal Products Technology and Quality Management, Wrocław University of Environmental and Life Sciences, ul. Chełmońskiego 37/41, 51-630 Wrocław, Poland
| | - Krzysztof Marycz
- Department of Animal Hygiene and Animal Welfare, Wrocław University of Environmental and Life Sciences, ul. Chełmońskiego 38 C, 51-631 Wrocław, Poland
| |
Collapse
|
185
|
Kumar Ch S, Sarada P, Reddy Ch S, Reddy M S, Dsv N. Plasma torch toothbrush a new insight in fear free dentisry. J Clin Diagn Res 2014; 8:ZE07-10. [PMID: 25121075 DOI: 10.7860/jcdr/2014/8815.4516] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 06/03/2014] [Indexed: 11/24/2022]
Abstract
Dental treatment is considered painful either because of fear or anxiety. Even though fear and anxiety could be managed; the needle pricks and the heat generated with drills are both painful and destructive to the tissues of the tooth. A new technology which can reduce the pain and destruction of the dental tissues will be of huge value. Plasma torch toothbrush fits into such criteria and when developed fully, will be able to apply for many of the dental procedures for increasing the efficiency.
Collapse
Affiliation(s)
- Santosh Kumar Ch
- Reader, Department of Pedodontics, Sri Sai College of Dental Surgery , Telangana, India
| | - P Sarada
- Professor, Department of Pedodontics, Sri Sai College of Dental Surgery , Telangana, India
| | - Sampath Reddy Ch
- Professor, Department of Pedodontics, Sri Sai College of Dental Surgery , Telangana, India
| | - Surendra Reddy M
- Senior Lecturer, Department of Pedodontics, Sri Sai College of Dental Surgery , Telangana, India
| | - Nagasailaja Dsv
- Post Graduate, Department of Pedodontics, Sri Sai College of Dental Surgery , Telangana, India
| |
Collapse
|
186
|
Kim JE, Lee DU, Min SC. Microbial decontamination of red pepper powder by cold plasma. Food Microbiol 2013; 38:128-36. [PMID: 24290635 DOI: 10.1016/j.fm.2013.08.019] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2013] [Revised: 08/05/2013] [Accepted: 08/29/2013] [Indexed: 11/16/2022]
Abstract
Effects of the microwave-powered cold plasma treatments (CPTs) on the inhibition of microorganisms in red pepper powder, including Aspergillus flavus and Bacillus cereus spores, were investigated. Combinations of heat treatment with CPT were investigated for the inhibition of B. cereus spores on the powder. The number of A. flavus was reduced by 2.5 ± 0.3 log spores/g by the CPT with nitrogen at 900 W and 667 Pa for 20 min. CPT at 900 W and 667 Pa for 20 min inhibited naturally occurring total aerobic bacteria in the red pepper powder by approximately 1 log CFU/g. B. cereus spores were inhibited (3.4 ± 0.7 log spores/g reduction) only when heat treatment at 90 °C for 30 min was integrated with the CPT using a helium-oxygen gas mixture at 900 W. Fermi's model and Weibull model adequately described the inhibition of A. flavus on the red pepper powder by the CPT. The changes in treatment temperature and water activity were less than 5.0 °C (initial temperature: 23.8 °C) and 0.22, respectively, and were affected by both treatment power and time (P < 0.05). The CPTs have demonstrated the potential to reduce the microbial counts of red pepper powder and other powder products.
Collapse
Affiliation(s)
- Jung Eun Kim
- Department of Food Science and Technology, Seoul Women's University, 621 Hwarangro, Nowon-gu, Seoul 139-774, Republic of Korea
| | | | | |
Collapse
|