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Gamma-radiation combined with tricycloazole to protect tempera paintings in ancient Egyptian tombs (Nile Delta, Lower Egypt). J Radioanal Nucl Chem 2019. [DOI: 10.1007/s10967-019-06580-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Inactivation of fungal contaminants on Korean traditional cashbox by gamma irradiation. Radiat Phys Chem Oxf Engl 1993 2016. [DOI: 10.1016/j.radphyschem.2015.05.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Wang TH, Kittipayak S, Lin YT, Lin CH, Pan LK. Quantification of the In Vitro Radiosensitivity of Mung Bean Sprout Elongation to 6MV X-Ray: A Revised Target Model Study. PLoS One 2015; 10:e0128384. [PMID: 26053016 PMCID: PMC4459877 DOI: 10.1371/journal.pone.0128384] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2014] [Accepted: 04/26/2015] [Indexed: 11/19/2022] Open
Abstract
In this study, a revised target model for quantifying the in vitro radiosensitivity of mung bean sprout elongation to 6-MV X-rays was developed. The revised target model, which incorporated the Poisson prediction for a low probability of success, provided theoretical estimates that were highly consistent with the actual data measured in this study. The revised target model correlated different in vitro radiosensitivities to various effective target volumes and was successfully confirmed by exposing mung beans in various elongation states to various doses of 6-MV X-rays. For the experiment, 5,000 fresh mung beans were randomly distributed into 100 petri dishes, which were randomly divided into ten groups. Each group received an initial watering at a different time point prior to X-ray exposure, resulting in different effective target volumes. The bean sprouts were measured 70 hr after X-ray exposure, and the average length of the bean sprouts in each group was recorded as an index of the mung bean in vitro radiosensitivity. Mung beans that received an initial watering either six or sixteen hours before X-ray exposure had the shortest sprout length, indicating that the maximum effective target volume was formed within that specific time period. The revised target model could be also expanded to interpret the "two-hit" model of target theory, although the experimental data supported the "one-hit" model. If the "two-hit" model was sustained, theoretically, the target size would be 2.14 times larger than its original size to produce the same results.
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Affiliation(s)
- Tzu Hwei Wang
- Department of Radiotherapy Oncology, Buddhist Tzu Chi General Hospital, Taichung Branch, Taichung, 427, Taiwan
- Graduate Institute of Radiological Science, Central Taiwan University of Science and Technology Takun, Taichung, 406, Taiwan
| | - Samrit Kittipayak
- Graduate Institute of Radiological Science, Central Taiwan University of Science and Technology Takun, Taichung, 406, Taiwan
| | - Yu Ting Lin
- Graduate Institute of Radiological Science, Central Taiwan University of Science and Technology Takun, Taichung, 406, Taiwan
- Department of Radiology, China Medical University Beigang Hospital, Yunlin, 651, Taiwan
| | - Cheng Hsun Lin
- Graduate Institute of Radiological Science, Central Taiwan University of Science and Technology Takun, Taichung, 406, Taiwan
| | - Lung Kwang Pan
- Graduate Institute of Radiological Science, Central Taiwan University of Science and Technology Takun, Taichung, 406, Taiwan
- * E-mail:
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Nocardia Septic Arthritis Complicating an Anterior Cruciate Ligament Repair. J Clin Microbiol 2015; 53:2760-2. [PMID: 26041900 DOI: 10.1128/jcm.00754-15] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2015] [Accepted: 05/26/2015] [Indexed: 01/18/2023] Open
Abstract
Nocardia infection following anterior cruciate ligament (ACL) allograft reconstruction is a rare occurrence. We report a case of Nocardia infection of an allograft ACL reconstruction and septic arthritis of the knee joint due to an organism most similar to the novel Nocardia species Nocardia aobensis.
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Hossain F, Follett P, Vu KD, Salmieri S, Senoussi C, Lacroix M. Radiosensitization of Aspergillus niger and Penicillium chrysogenum using basil essential oil and ionizing radiation for food decontamination. Food Control 2014. [DOI: 10.1016/j.foodcont.2014.04.022] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Nemţanu MR, Braşoveanu M, Karaca G, Erper İ. Inactivation effect of electron beam irradiation on fungal load of naturally contaminated maize seeds. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:2668-2673. [PMID: 24604474 DOI: 10.1002/jsfa.6607] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2013] [Revised: 01/17/2014] [Accepted: 01/30/2014] [Indexed: 06/03/2023]
Abstract
BACKGROUND This work focuses on the effect of accelerated electrons (0.1-6.2 kGy) on naturally attached fungi on maize seeds. The fungal viability and corresponding inactivation kinetics were determined. The inactivation and radiosensitivity of the most abundant species in the contaminant fungi detected on maize seeds (Aspergillus spp., Penicillium spp. and Fusarium spp.) are discussed. RESULTS Fungal contamination of maize seeds decreased significantly with increasing irradiation dose. The survival curve of total fungi determined by the blotter test showed a sigmoidal pattern that can be attributed to the mixture of fungal subpopulations with different radiation sensitivities. This behaviour could be modelled well (R² = 0.995) with a modified Gompertz equation. The predicted values for shoulder length and inactivation rate were 0.63 ± 0.10 kGy and 0.44 ± 0.04 kGy⁻¹ respectively. The sensitivity of the most common fungi to electron beam treatment followed the order Penicillium spp. > Fusarium spp. > Aspergillus spp., with total inactivation at irradiation doses of 1.7, 2.5 and 4.8 kGy respectively. CONCLUSION The effect of electron beam treatment against fungi on naturally contaminated maize seeds depended on irradiation dose, allowing the control of maize fungal load.
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Affiliation(s)
- Monica R Nemţanu
- Electron Accelerators Laboratory, National Institute for Lasers, Plasma and Radiation Physics, 409 Atomistilor Street, PO Box MG-36, RO-077125, Bucharest-Magurele, Romania
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Hwang EN, Kang SM, Kim JK, Lee JW, Park JH. Screening of Radio-resistant Lactic Acid Bacteria. Korean J Food Sci Anim Resour 2013. [DOI: 10.5851/kosfa.2013.33.3.335] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Ferreira-Castro F, Potenza M, Rocha L, Correa B. Interaction between toxigenic fungi and weevils in corn grain samples. Food Control 2012. [DOI: 10.1016/j.foodcont.2012.02.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Maity JP, Kar S, Banerjee S, Sudershan M, Chakraborty A, Santra SC. Effects of gamma radiation on fungi infected rice (in vitro). Int J Radiat Biol 2011; 87:1097-102. [DOI: 10.3109/09553002.2011.606288] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Ribeiro J, Cavaglieri L, Vital H, Cristofolini A, Merkis C, Astoreca A, Orlando J, Carú M, Dalcero A, Rosa C. Effect of gamma radiation on Aspergillus flavus and Aspergillus ochraceus ultrastructure and mycotoxin production. Radiat Phys Chem Oxf Engl 1993 2011. [DOI: 10.1016/j.radphyschem.2010.12.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Aquino S, Gonçalez E, Rossi MH, Nogueira JHDC, Reis TAD, Corrêa B. Evaluation of fungal burden and aflatoxin presence in packed medicinal plants treated by gamma radiation. J Food Prot 2010; 73:932-7. [PMID: 20501045 DOI: 10.4315/0362-028x-73.5.932] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study was developed to evaluate the fungal burden, toxigenic molds, and mycotoxin contamination and to verify the effects of gamma radiation in four kinds of medicinal plants stored before and after 30 days of irradiation treatment. Eighty samples of medicinal plants (Peumus boldus, Camellia sinensis, Maytenus ilicifolia, and Cassia angustifolia) purchased from drugstores, wholesale, and open-air markets in São Paulo city, Brazil, were analyzed. The samples were treated using a (60)Co gamma ray source (Gammacell) with doses of 5 and 10 kGy. Nonirradiated samples were used as controls of fungal isolates. For enumeration of fungi on medicinal plants, serial dilutions of the samples were plated in duplicate onto dichloran 18% glycerol agar. The control samples revealed a high burden of molds, including toxigenic fungi. The process of gamma radiation was effective in reducing the number of CFU per gram in all irradiated samples of medicinal plants after 30 days of storage, using a dose of 10 kGy and maintaining samples in a protective package. No aflatoxins were detected. Gamma radiation treatment can be used as an effective method for preventing fungal deterioration of medicinal plants subject to long-term storage.
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Affiliation(s)
- Simone Aquino
- Instituto Biológico de São Paulo, Av. Conselheiro Rodrigues Alves 1252, CEP 04014-002, São Paulo, SP, Brazil.
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Braghini R, Pozzi C, Aquino S, Rocha L, Corrêa B. Effects of γ-radiation on the fungus Alternaria alternata in artificially inoculated cereal samples. Appl Radiat Isot 2009; 67:1622-8. [DOI: 10.1016/j.apradiso.2009.03.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 03/09/2009] [Accepted: 03/09/2009] [Indexed: 11/25/2022]
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MAITY JYOTIPRAKASH, CHAKRABORTY ANINDITA, SANTRA SUBHASC. EFFECTS OF STERILIZATION BY GAMMA RADIATION OF EDIBLE STOREDVIGNA MUNGOL. ANDTRITICUM AESTIVUML. SEED INFESTED WITH SURFACE MICROFLORA IN INDIA. J Food Saf 2009. [DOI: 10.1111/j.1745-4565.2009.00168.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Maity J, Chakraborty A, Chanda S, Santra S. Effect of gamma radiation on growth and survival of common seed-borne fungi in India. Radiat Phys Chem Oxf Engl 1993 2008. [DOI: 10.1016/j.radphyschem.2008.02.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ferreira-Castro FL, Aquino S, Greiner R, Ribeiro DHB, Reis TA, Corrêa B. Effects of gamma radiation on maize samples contaminated with Fusarium verticillioides. Appl Radiat Isot 2007; 65:927-33. [PMID: 17537639 DOI: 10.1016/j.apradiso.2007.03.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2006] [Revised: 03/15/2007] [Accepted: 03/21/2007] [Indexed: 11/23/2022]
Abstract
The efficacy of gamma-irradiation as a method of decontamination of maize containing Fusarium verticillioides under controlled conditions of relative humidity (RH) (97.5%) and water activity has been studied. Maize grains inoculated with a spore suspension of F. verticillioides were irradiated to 2, 5, and 10 kGy. Thereafter, the irradiated and control samples were analyzed for the presence of fumonisins, their viable cells were counted, and their morphology was investigated by electronic microscopy. It was found possible to decrease the risk of exposure to fumonisins by irradiating maize to 5 or 10 kGy. However, at the dose of 2 kGy, the survived fungi (36%) can produce more fumonisins than the fungi in the control unirradiated samples under the same conditions.
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Affiliation(s)
- F L Ferreira-Castro
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, Av. Prof. Lineu Prestes 1374, CEP 05508-900 São Paulo, Brazil.
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Trampuz A, Piper KE, Steckelberg JM, Patel R. Effect of gamma irradiation on viability and DNA of Staphylococcus epidermidis and Escherichia coli. J Med Microbiol 2006; 55:1271-1275. [PMID: 16914659 DOI: 10.1099/jmm.0.46488-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Gamma irradiation is widely used for sterilization; however, its effect on elimination of amplifiable DNA, an issue of relevance to molecular diagnostic approaches, has not been well studied. The effect of gamma irradiation on the viability of Staphylococcus epidermidis and Escherichia coli (using quantitative cultures) and on their DNA (using quantitative 16S rRNA gene PCR) was evaluated. Viability was abrogated at 2.8 and 3.6 kGy for S. epidermidis and E. coli, respectively. The radiation dose required to reduce viable bacteria by one log10 (D10 value) was 0.31 and 0.35 kGy for S. epidermidis and E. coli, respectively. D10 values for amplifiable DNA extracted from bacteria were 2.58 and 3.09 kGy for S. epidermidis and E. coli, respectively, whereas D10 values for amplifiable DNA were significantly higher for DNA extracted from irradiated viable bacterial cells (22.9 and 52.6 kGy for S. epidermidis and E. coli, respectively; P<0.001). This study showed that gamma irradiation of DNA in viable bacterial cells has little effect on amplifiable DNA, was not able to eliminate amplifiable 16S rRNA genes at a dose of up to 12 kGy and cannot therefore be used for elimination of DNA contamination of PCR reaction components or laboratory equipment when this DNA is present in microbial cells. This finding has practical implications for those using molecular diagnostic techniques in microbiology.
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Maity J, Chakraborty A, Saha A, Santra S, Chanda S. Radiation-induced effects on some common storage edible seeds in India infested with surface microflora. Radiat Phys Chem Oxf Engl 1993 2004. [DOI: 10.1016/j.radphyschem.2003.10.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Jones HE, West HM, Chamberlain PM, Parekh NR, Beresford NA, Crout NMJ. Effects of gamma irradiation on Holcus lanatus (Yorkshire fog grass) and associated soil microorganisms. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY 2004; 74:57-71. [PMID: 15063536 DOI: 10.1016/j.jenvrad.2004.01.027] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
An investigation was conducted to determine the impact of acute doses of gamma radiation on the microbial community structure of a Holcus lanatus dominated grassland soil. Mesocosms containing soil and established grass were irradiated using a sealed (137)Cs source (7.0 Gy min(-1)). Doses ranged from 5 to 160 Gy, analyses were conducted on the day of irradiation, then 7 and 30 days later. Plant growth and arbuscular mycorrhizal fungal colonisation of roots were reduced by irradiation. Gram-negative bacteria, and microbial metabolic capacity were also negatively affected by treatment. Microbial biomass measured by phospholipid fatty acid (PLFA) analysis, showed an increase at doses above 20 Gy, 7 and 30 days after treatment. Proportions of Gram-positive bacterial and fungal PLFAs fluctuated inversely to each other, in response to both sampling time and radiation dose. We hypothesise that many of the observed soil microbial responses are indirect effects mediated by the influence of ionising radiation on the plants in this system.
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Affiliation(s)
- Helen E Jones
- School of Life and Environmental Sciences, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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YOUSSEF BOTHAINAM, MAHROUS SOUZANR, AZIZ NAGYH. EFFECT OF GAMMA IRRADIATION ON AFLATOXIN B1PRODUCTION BY ASPERGILLUS FLAVUS IN GROUND BEEF STORED AT 5C. J Food Saf 1999. [DOI: 10.1111/j.1745-4565.1999.tb00248.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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