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Hata Y, Hiruma S, Miyazaki H, Nakamura S. Sequential Approach for Water Purification Using Seashell-Derived Calcium Oxide through Disinfection and Flocculation with Polyphosphate for Chemical Pollutant Removal. ACS OMEGA 2024; 9:12635-12642. [PMID: 38524416 PMCID: PMC10955710 DOI: 10.1021/acsomega.3c07627] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 02/20/2024] [Accepted: 02/23/2024] [Indexed: 03/26/2024]
Abstract
Safe water supply is usually inadequate in areas without water treatment plants and even in a city under emergency conditions due to a disaster, even though safe water is essential for drinking and other various purposes. The purification of surface water from a river, lake, or pond requires disinfection and removal of chemical pollutants. In this study, we report a water purification strategy using seashell-derived calcium oxide (CaO) via disinfection and subsequent flocculation with polyphosphate for chemical pollutant removal. Seashell-derived CaO at a concentration (2 g L-1) higher than its saturation concentration caused the >99.999% inactivation of bacteria, mainly due to the alkalinity of calcium hydroxide (Ca(OH)2) produced by hydration. After the disinfection, the addition of sodium polyphosphate at 2 g L-1 allowed for the flocculation of CaO/Ca(OH)2 particles with adsorbing chemical pollutants, such as Congo red, dichlorodiphenyltrichloroethane, di(2-ethylhexyl)phthalate, and polychlorinated biphenyls, for removing these pollutants; purified water was obtained through filtration. Although this purified water was initially highly alkaline (pH ∼ 12.5), its pH decreased into a weak alkaline region (pH ∼ 9) during exposure to ambient air by absorbing carbon dioxide from the air with the precipitating calcium carbonate. The advantages of this water purification strategy include the fact that the saturation of CaO/Ca(OH)2 potentially serves as a visual indicator of disinfection, that the flocculation by polyphosphate removes excessive CaO/Ca(OH)2 as well as chemical pollutants, and that the high pH and Ca2+ concentrations in the resulting purified water are readily decreased. Our findings suggest the usability of seashell-derived material-polymer assemblies for water purification, especially under emergency conditions due to disasters.
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Affiliation(s)
- Yuuki Hata
- Department
of Chemical Science and Engineering, School of Materials and Chemical
Technology, Tokyo Institute of Technology, 2-12-1-H121 Ookayama, Meguro-ku 152-8550, Tokyo, Japan
- Division
of Biomedical Engineering, National Defense
Medical College Research Institute, 3-2 Namiki, Tokorozawa-shi 359-8513, Saitama, Japan
| | - Sumiyo Hiruma
- Division
of Biomedical Engineering, National Defense
Medical College Research Institute, 3-2 Namiki, Tokorozawa-shi 359-8513, Saitama, Japan
| | - Hiromi Miyazaki
- Division
of Biomedical Engineering, National Defense
Medical College Research Institute, 3-2 Namiki, Tokorozawa-shi 359-8513, Saitama, Japan
| | - Shingo Nakamura
- Division
of Biomedical Engineering, National Defense
Medical College Research Institute, 3-2 Namiki, Tokorozawa-shi 359-8513, Saitama, Japan
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2
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Omura K, Kaibara E, Yamaguchi S, Aoyagi H, Nishio M, Tomita K, Sawai J. Effect of Treatment with Heated Scallop Shell Powder on the Inactivation of Naturally Existing Bacteria and Listeria monocytogenes Inoculated on Chicken Meat. Foods 2024; 13:370. [PMID: 38338505 PMCID: PMC10855425 DOI: 10.3390/foods13030370] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 01/17/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
This study investigated the efficacy of heated scallop shell powder (HSSP) treatment in preserving chicken thigh meat. Chicken thigh meat was treated with HSSP slurry (1% and 5%) for 60 min, and the variation in aerobic bacteria and coliform populations was assessed during refrigerated storage (10 °C). There was a substantial increase in aerobic bacteria, reaching nearly 7 log10 colony forming unit (CFU)/g following 7 days of refrigeration, in the untreated chicken meat. Conversely, the aerobic bacterial population of the HSSP-treated chicken was <5 log10 CFU/g. Coliform growth in the untreated chicken reached over 5 log10 CFU/g following 7 days. In contrast, the coliform population of the HSSP-treated chicken did not reach 5 log10 CFU/g at 1% HSSP concentration; it was suppressed to <4 log10 CFU/g at 5% concentration. Listeria monocytogenes, which can grow at low temperatures, was inoculated into the chicken meat (5 log10 CFU/g) treated with alcohol, which was followed by HSSP. In the untreated chicken, L. monocytogenes increased to 9 log10 CFU/g even when refrigerated for 7 days. However, in the chicken treated with 5% HSSP, L. monocytogenes was suppressed to approximately 3 log10 CFU/g. These findings reveal that HSSP treatment is an effective method for disinfecting meat, inhibiting bacterial growth, and enhancing preservation.
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Affiliation(s)
- Kiuta Omura
- Department of Nutrition and Life Science, Faculty of Health and Medical Sciences, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Kanagawa, Japan
| | - Emi Kaibara
- Department of Nutrition and Life Science, Faculty of Health and Medical Sciences, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Kanagawa, Japan
| | - Sae Yamaguchi
- Department of Nutrition and Life Science, Faculty of Health and Medical Sciences, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Kanagawa, Japan
| | - Hana Aoyagi
- Department of Nutrition and Life Science, Faculty of Health and Medical Sciences, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Kanagawa, Japan
| | - Mari Nishio
- Department of Nutrition and Life Science, Faculty of Health and Medical Sciences, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Kanagawa, Japan
| | - Kazuhisa Tomita
- Faculty of Applied Biosciences, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Kanagawa, Japan
| | - Jun Sawai
- Department of Nutrition and Life Science, Faculty of Health and Medical Sciences, Kanagawa Institute of Technology, 1030 Shimo-Ogino, Atsugi 243-0292, Kanagawa, Japan
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3
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Borowicz M, Krzyżanowska DM, Jafra S. Crystal violet-based assay for the assessment of bacterial biofilm formation in medical tubing. J Microbiol Methods 2023; 204:106656. [PMID: 36526040 DOI: 10.1016/j.mimet.2022.106656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 11/28/2022] [Accepted: 12/11/2022] [Indexed: 12/15/2022]
Abstract
Crystal violet-based assay is widely used to evaluate the early stages of bacterial biofilm formation. Here, we modified it to study biofilm formation in medical tubing. While cost-effective and requiring no sophisticated equipment, our method provided quantitative and qualitative distinctions between the ability of four bacterial strains to colonize PVC catheters.
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Affiliation(s)
- Marcin Borowicz
- Laboratory of Plant Microbiology, Intercollegiate Faculty of Biotechnology of the University of Gdańsk and Medical University of Gdańsk, University of Gdańsk, ul. A. Abrahama 58, 80-307 Gdańsk, Poland
| | - Dorota M Krzyżanowska
- Laboratory of Biologically Active Compounds, Intercollegiate Faculty of Biotechnology of the University of Gdańsk and Medical University of Gdańsk, University of Gdańsk, ul. A. Abrahama 58, 80-307 Gdańsk, Poland
| | - Sylwia Jafra
- Laboratory of Plant Microbiology, Intercollegiate Faculty of Biotechnology of the University of Gdańsk and Medical University of Gdańsk, University of Gdańsk, ul. A. Abrahama 58, 80-307 Gdańsk, Poland.
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4
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Hata Y, Bouda Y, Hiruma S, Miyazaki H, Nakamura S. Biofilm Degradation by Seashell-Derived Calcium Hydroxide and Hydrogen Peroxide. NANOMATERIALS (BASEL, SWITZERLAND) 2022; 12:3681. [PMID: 36296871 PMCID: PMC9609215 DOI: 10.3390/nano12203681] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/04/2022] [Accepted: 10/14/2022] [Indexed: 06/16/2023]
Abstract
Microbial cells and self-produced extracellular polymeric substances assembled to form biofilms that are difficult to remove from surfaces, causing problems in various fields. Seashell-derived calcium hydroxide, a sustainable inorganic material, has shown high bactericidal activity even for biofilms due to its alkalinity. However, its biofilm removal efficacy is relatively low. Herein, we report a biofilm degradation strategy that includes two environmentally friendly reagents: seashell-derived calcium hydroxide and hydrogen peroxide. A biofilm model of Escherichia coli was prepared in vitro, treated with calcium hydroxide-hydrogen peroxide solutions, and semi-quantified by the crystal violet stain method. The treatment significantly improved biofilm removal efficacy compared with treatments by calcium hydroxide alone and hydrogen peroxide alone. The mechanism was elucidated from calcium hydroxide-hydrogen peroxide solutions, which suggested that perhydroxyl anion and hydroxyl radical generated from hydrogen peroxide, as well as the alkalinity of calcium hydroxide, enhanced biofilm degradation. This study showed that concurrent use of other reagents, such as hydrogen peroxide, is a promising strategy for improving the biofilm degradation activity of seashell-derived calcium hydroxide and will contribute to developing efficient biofilm removal methods.
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Affiliation(s)
- Yuuki Hata
- Correspondence: (Y.H.); (S.N.); Tel.: +81-4-2995-1211 (Y.H. & S.N.)
| | | | | | | | - Shingo Nakamura
- Correspondence: (Y.H.); (S.N.); Tel.: +81-4-2995-1211 (Y.H. & S.N.)
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5
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Antibiofilm Effects of Heated Scallop Shell Powder on Campylobacter jejuni Biofilms. MEMBRANES 2021; 12:membranes12010043. [PMID: 35054569 PMCID: PMC8779294 DOI: 10.3390/membranes12010043] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/24/2021] [Revised: 12/23/2021] [Accepted: 12/28/2021] [Indexed: 11/17/2022]
Abstract
Methods to reuse large numbers of scallop shells from the harvesting regions of Japan are being explored. The major component of scallop shells is calcium carbonate (CaCO3), which forms the powerful bactericidal agent, calcium oxide (CaO), when heated. Heated scallop shell powder (HSSP) exhibits strong and broad-spectrum antimicrobial activity against bacteria, fungi, and viruses. This study investigated the antibiofilm activity of HSSP against the biofilms of Campylobacter jejuni, which is the predominant species in campylobacteriosis. Biofilm samples of C. jejuni were prepared on 0.45 µm filter paper under microaerobic conditions. The HSSP treatment inactivated and eradicated C. jejuni biofilms. The resistance of C. jejuni biofilms to HSSP was significantly higher than that of the floating cells. Moreover, the antibiofilm activity of the HSSP treatment against C. jejuni biofilms was higher than that of NaOH treatment at the same pH. These results indicated that HSSP treatment is an effective method for controlling C. jejuni biofilms.
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Hata Y, Ishihara M, Hiruma S, Takayama T, Nakamura S, Ando N. Recent Progress in the Development of Disinfectants from Scallop Shell-Derived Calcium Oxide for Clinical and Daily Use. Biocontrol Sci 2021; 26:129-135. [PMID: 34556615 DOI: 10.4265/bio.26.129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The current pandemic of novel coronavirus disease (COVID-19) has highlighted the importance of disinfectants. As a raw material for next-generation disinfectants, scallop shell-derived calcium oxide (CaO) has been revealed to exhibit significant virucidal and microbicidal activities and is compatible with living tissues and the environment. This minireview summarizes recent progress in the development of disinfectants from scallop shell-CaO, focusing especially on studies of clinical and daily use applications. We describe the preparation, basic characteristics, and virucidal and microbicidal activities of scallop shell-CaO disinfectants. Furthermore, their applications in the disinfection of contaminated masks and the treatment of infected wounds are briefly introduced.
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Affiliation(s)
- Yuuki Hata
- Division of Biomedical Engineering, National Defense Medical College Research Institute
| | - Masayuki Ishihara
- Division of Biomedical Engineering, National Defense Medical College Research Institute
| | - Sumiyo Hiruma
- Division of Biomedical Engineering, National Defense Medical College Research Institute
| | - Tomohiro Takayama
- Department of Oral and Maxillofacial Surgery, National Defense Medical College Hospital
| | - Shingo Nakamura
- Division of Biomedical Engineering, National Defense Medical College Research Institute
| | - Naoko Ando
- Division of Biomedical Engineering, National Defense Medical College Research Institute
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7
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Takayama T, Ishihara M, Sato Y, Nakamura S, Fukuda K, Murakami K, Yokoe H. Bioshell calcium oxide (BiSCaO) for cleansing and healing Pseudomonas aeruginosa-infected wounds in hairless rats. Biomed Mater Eng 2021; 31:95-105. [PMID: 32568170 DOI: 10.3233/bme-201082] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND Scallop shell powder is called bioshell calcium oxide (BiSCaO), which is known to possess deodorizing properties and broad antimicrobial activity against various pathogenic microbes, including viruses, bacteria, spores, and fungi. OBJECTIVE This study aims to investigate the applications of BiSCaO suspension cleansing in clinical situations, for instance for the prevention and treatment of infections in chronic wounds in healing-impaired patients, without delaying wound healing. METHODS The bactericidal activities of 1000 ppm BiSCaO suspension; 500 ppm hypochlorous acid; 1000 ppm povidone iodine; and saline were compared to evaluate in vivo disinfection and healing of Pseudomonas aeruginosa-infected wounds in hairless rats. RESULTS Cleansing of the infected wounds with BiSCaO suspension daily for 3 days significantly enhanced wound healing and reduced the in vivo bacterial counts, in comparison to hypochlorous acid, povidone iodine, and saline. Furthermore, histological examinations showed significantly advanced granulation tissue and capillary formation in the wounds cleansed with BiSCaO suspension than in those cleansed with the other solutions. CONCLUSIONS This study suggested that the possibility of using BiSCaO suspension as a disinfectant for infected wounds and limiting disinfection to 3 days may be sufficient to avoid the negative effects on wound repair.
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Affiliation(s)
- Tomohiro Takayama
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Masayuki Ishihara
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Yoko Sato
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Shingo Nakamura
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Koichi Fukuda
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Kaoru Murakami
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan
| | - Hidetaka Yokoe
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, Tokorozawa, Saitama, Japan
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8
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Ishihara M, Hata Y, Hiruma S, Takayama T, Nakamura S, Sato Y, Ando N, Fukuda K, Murakami K, Yokoe H. Safety of Concentrated Bioshell Calcium Oxide Water Application for Surface and Skin Disinfections against Pathogenic Microbes. Molecules 2020; 25:E4502. [PMID: 33019606 PMCID: PMC7582750 DOI: 10.3390/molecules25194502] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 09/25/2020] [Accepted: 09/29/2020] [Indexed: 01/07/2023] Open
Abstract
Immediately post-production, commercially available bioshell calcium oxide (BiSCaO) water is colorless, transparent, and strongly alkaline (pH 12.8), and is known to possess deodorizing properties and broad microbicidal activity. However, BiSCaO Water may represent a serious safety risk to the living body, given the strong alkalinity. This study aimed to investigate the safety of BiSCaO Water for use as an antiseptic/disinfectant despite concerns regarding its high alkalinity. The change over time in pH of BiSCaO Water was measured during air contact (stirring BiSCaO Water in ambient air). When sprayed on metal, plastic, wood piece, paper, and skin surfaces, the pH of BiSCaO Water decreased rapidly, providing a white powder coating upon drying. Scanning electron microscopy images, energy dispersive X-ray elemental mapping, and X-ray diffractograms showed that the dried powder residues of BiSCaO Water were composed primarily of calcium carbonate. These results suggested that BiSCaO Water is a potent reagent that may overcome the obstacles of being strongly alkaline, making this material appropriate for use in disinfection against pathogenic microbes.
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Affiliation(s)
- Masayuki Ishihara
- Division of Biomedical Engineering, National Defense Medical College Research Institute, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (Y.H.); (S.H.); (S.N.); (N.A.); (K.F.)
| | - Yuuki Hata
- Division of Biomedical Engineering, National Defense Medical College Research Institute, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (Y.H.); (S.H.); (S.N.); (N.A.); (K.F.)
| | - Sumiyo Hiruma
- Division of Biomedical Engineering, National Defense Medical College Research Institute, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (Y.H.); (S.H.); (S.N.); (N.A.); (K.F.)
| | - Tomohiro Takayama
- Department of Oral and Maxillofacial Surgery, National Defense Medical College Hospital, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (T.T.); (K.M.); (H.Y.)
| | - Shingo Nakamura
- Division of Biomedical Engineering, National Defense Medical College Research Institute, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (Y.H.); (S.H.); (S.N.); (N.A.); (K.F.)
| | - Yoko Sato
- Division of Statistical Analysis, Research Support Center, Shizuoka General Hospital, 4-27-1 Kita-ando, Aoi-ku, Shizuoka 420-8527, Japan;
| | - Naoko Ando
- Division of Biomedical Engineering, National Defense Medical College Research Institute, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (Y.H.); (S.H.); (S.N.); (N.A.); (K.F.)
| | - Koichi Fukuda
- Division of Biomedical Engineering, National Defense Medical College Research Institute, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (Y.H.); (S.H.); (S.N.); (N.A.); (K.F.)
| | - Kaoru Murakami
- Department of Oral and Maxillofacial Surgery, National Defense Medical College Hospital, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (T.T.); (K.M.); (H.Y.)
| | - Hidetaka Yokoe
- Department of Oral and Maxillofacial Surgery, National Defense Medical College Hospital, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (T.T.); (K.M.); (H.Y.)
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9
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Concentrated Bioshell Calcium Oxide (BiSCaO) Water Kills Pathogenic Microbes: Characterization and Activity. Molecules 2020; 25:molecules25133001. [PMID: 32630051 PMCID: PMC7412244 DOI: 10.3390/molecules25133001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/26/2020] [Accepted: 06/27/2020] [Indexed: 12/17/2022] Open
Abstract
Bioshell calcium oxide (BiSCaO) exhibits deodorizing properties and broad microbicidal activity. In this study, we examined possible utility of BiSCaO Water for that purpose. BiSCaO Water was prepared by adding 10 wt% BiSCaO to clean water and gently collecting the supernatant in a bottle. The same volume of clean water was gently poured onto the BiSCaO precipitate and the supernatant was gently collected in a bottle; this process was repeated fifty times. The produced BiSCaO Water contained nanoparticles (about 400-800 nm) composed of smaller nanoparticles (100-200 nm), and was colorless and transparent, with a pH > 12.7. In vitro assays demonstrated that BiSCaO Water eliminated more than 99.9% of influenza A (H1N1) and Feline calicivirus, Escherichia coli such as NBRC 3972 and O-157:H7, Pseudomonas aeruginosa, Salmonella, and Staphylococcus aureus within 15 min. We compared BiSCaO Water with the other microbicidal reagents such as ethanol, BiSCaO, BiSCa(OH)2 suspensions, povidone iodine, NaClO, BiSCaO dispersion and colloidal dispersion with respect to deodorization activity and microbicidal efficacy. The results showed that BiSCaO Water was a potent reagent with excellent deodorization and disinfection activities against pathogenic bacteria and viruses (including both enveloped and nonenveloped viruses).
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Takayama T, Ishihara M, Nakamura S, Sato Y, Hiruma S, Fukuda K, Murakami K, Yokoe H. Bioshell Calcium Oxide (BiSCaO) Ointment for the Disinfection and Healing of Pseudomonas aeruginosa-Infected Wounds in Hairless Rats. Int J Mol Sci 2020; 21:E4176. [PMID: 32545309 PMCID: PMC7312885 DOI: 10.3390/ijms21114176] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 06/02/2020] [Accepted: 06/09/2020] [Indexed: 12/24/2022] Open
Abstract
Bioshell calcium oxide (BiSCaO) possesses deodorizing properties and broad microbicidal activity. This study aimed to investigate the application of BiSCaO ointment for the prevention and treatment of infection in chronic wounds in healing-impaired patients, without delaying wound healing. The bactericidal activities of 0.04, 0.2, 1, and 5 wt% BiSCaO ointment, 3 wt% povidone iodine ointment, and control (ointment only) were compared to evaluate the in vivo disinfection and healing of Pseudomonas aeruginosa-infected wounds in hairless rats. Treatment of the infected wounds with 0.2 wt% BiSCaO ointment daily for 3 days significantly enhanced wound healing and reduced the in vivo bacterial counts compared with povidone iodine ointment and control (no wound cleaning). Although 5 wt% BiSCaO ointment provided the lowest bacterial counts during 3 days' treatment, it delayed wound healing. Histological examinations showed significantly advanced granulation tissue and capillary formation in wounds treated with 0.2 wt% BiSCaO ointment for 3 days compared to wounds treated with the other ointments. This study suggested that using 0.2 wt% BiSCaO ointment as a disinfectant for infected wounds and limiting disinfection to 3 days may be sufficient to avoid the negative effects of BiSCaO on wound repair.
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Affiliation(s)
- Tomohiro Takayama
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (K.M.); (H.Y.)
| | - Masayuki Ishihara
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (M.I.); (S.N.); (S.H.); (K.F.)
| | - Shingo Nakamura
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (M.I.); (S.N.); (S.H.); (K.F.)
| | - Yoko Sato
- Division of Statistical Analysis, Research Support Center, Shizuoka General Hospital, 4-27-1 Kita-ando, Aoi-ku, Shizuoka 420-8527, Japan;
| | - Sumiyo Hiruma
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (M.I.); (S.N.); (S.H.); (K.F.)
| | - Koichi Fukuda
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (M.I.); (S.N.); (S.H.); (K.F.)
| | - Kaoru Murakami
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (K.M.); (H.Y.)
| | - Hidetaka Yokoe
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (K.M.); (H.Y.)
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11
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Sato Y, Ohata H, Inoue A, Ishihara M, Nakamura S, Fukuda K, Takayama T, Murakami K, Hiruma S, Yokoe H. Application of Colloidal Dispersions of Bioshell Calcium Oxide (BiSCaO) for Disinfection. Polymers (Basel) 2019; 11:E1991. [PMID: 31810346 PMCID: PMC6960535 DOI: 10.3390/polym11121991] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 11/26/2019] [Accepted: 11/27/2019] [Indexed: 11/24/2022] Open
Abstract
Bioshell calcium oxide (BiSCaO) is a scallop-shell powder heated at a high temperature. BiSCaO is composed mainly of calcium oxide and exhibits broad microbicidal properties. The aim of this study is to evaluate the disinfection and decontamination abilities of BiSCaO colloidal dispersions with that of commercially available bioshell calcium hydroxide (BiSCa(OH)2) following the formation of flocculants/precipitates under strongly alkaline conditions (pH 11.5-12.2). Various concentrations of BiSCaO and BiSCa(OH)2 colloidal dispersions were prepared by mixing with Na-polyPO4 (PP) and Na-triPO4 (TP) as flocculating agents. The microbicidal activities, and the degree of flocculation/precipitation of trypan blue, albumin, chondroitin sulfate, heparin, non-anticoagulant heparin carrying polystyrene (NAC-HCPS), and low-molecular-weight heparin/protamine nanoparticles (LMWH/P NPs) were dependent on the pH, the average particle diameter, and the concentration of BiSCaO or BiSCa(OH)2 and of the phosphate compound. BiSCaO (average particle diameter: 6 μm) colloidal dispersions (0.2 wt.%) containing 0.15 wt.% PP or TP exhibited substantially stronger microbicidal activity and flocculation/precipitation under strongly alkaline conditions. These results suggest that BiSCaO colloidal dispersions together with phosphate compounds have practical applicability for disinfection.
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Affiliation(s)
- Yoko Sato
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorazawa, Saitama 359-8513, Japan; (Y.S.); (H.O.); (A.I.); (S.N.); (K.F.); (S.H.)
| | - Heisuke Ohata
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorazawa, Saitama 359-8513, Japan; (Y.S.); (H.O.); (A.I.); (S.N.); (K.F.); (S.H.)
| | - Akinori Inoue
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorazawa, Saitama 359-8513, Japan; (Y.S.); (H.O.); (A.I.); (S.N.); (K.F.); (S.H.)
| | - Masayuki Ishihara
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorazawa, Saitama 359-8513, Japan; (Y.S.); (H.O.); (A.I.); (S.N.); (K.F.); (S.H.)
| | - Shingo Nakamura
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorazawa, Saitama 359-8513, Japan; (Y.S.); (H.O.); (A.I.); (S.N.); (K.F.); (S.H.)
| | - Koichi Fukuda
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorazawa, Saitama 359-8513, Japan; (Y.S.); (H.O.); (A.I.); (S.N.); (K.F.); (S.H.)
| | - Tomohiro Takayama
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (T.T.); (K.M.); (H.Y.)
| | - Kaoru Murakami
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (T.T.); (K.M.); (H.Y.)
| | - Sumiyo Hiruma
- Division of Biomedical Engineering, Research Institute, National Defense Medical College, 3-2 Namiki, Tokorazawa, Saitama 359-8513, Japan; (Y.S.); (H.O.); (A.I.); (S.N.); (K.F.); (S.H.)
| | - Hidetaka Yokoe
- Department of Oral and Maxillofacial Surgery, National Defense Medical College, 3-2 Namiki, Tokorozawa, Saitama 359-8513, Japan; (T.T.); (K.M.); (H.Y.)
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12
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Preparation and Application of Bioshell Calcium Oxide (BiSCaO) Nanoparticle-Dispersions with Bactericidal Activity. Molecules 2019; 24:molecules24183415. [PMID: 31546939 PMCID: PMC6767003 DOI: 10.3390/molecules24183415] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Revised: 09/04/2019] [Accepted: 09/08/2019] [Indexed: 01/12/2023] Open
Abstract
Scallop-shell powder (SSP) heated at high temperature exhibits high pH and broad antimicrobial activity. Bioshell calcium oxide (BiSCaO) is an SSP composed mainly of calcium oxide. It is poorly water-soluble under alkaline conditions and the generated precipitate can plug spray nozzles. The aim of this study was to establish that BiSCaO dispersion caused no significant CaO loss and plugging of spray nozzles, and to evaluate its deodorization and microbicidal abilities and its ability to reduce the concentrations of NO2- and NO3-. BiSCaO dispersions were prepared by mixing various concentrations of BiSCaO suspension, while phosphate compounds such as Na3PO4, Na2HPO4 or NaH2PO4 and the pH, average diameter, zeta potential, and form of the compounds with cryo-SEM were evaluated. We evaluated deodorization using tainted pork meat and microbicidal efficacy using contaminated suspension with normal bacterial flora. The concentration of NO2- and NO3- after mixing BiSCaO dispersion and pure water containing a high proportion of NO2- and NO3- were measured. BiSCaO dispersion formed with Na2HPO4, whose ratio to BiSCaO was 60%, showed a high pH (>12), a small particle diameter (>181 nm) and was stable for seven days. The BiSCaO dispersion showed higher deodorization and microbicidal activities than SSP-Ca(OH)2, which was mainly composed of Ca(OH)2. BiSCaO, but not SSP-Ca(OH)2, could reduce the concentration of NO2- and NO3- by more than 90% within 15 min. We developed a stable BiSCaO dispersion, and it had high deodorization and microbicidal efficacy. These activities of BiSCaO might result from the high pH caused by CaO hydration and a reduction activity causing active radical species.
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13
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Yang S, Peng Z, Wang L, Wang T, Yang C. Calcinated Shell Powder from Corbicula fluminea as a Natural Antimicrobial Agent for Soybean Curd (Tofu) Preservation. FOOD SCIENCE AND TECHNOLOGY RESEARCH 2019. [DOI: 10.3136/fstr.25.545] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Shihang Yang
- Department of Food Science and Technology, National Pingtung University of Science and Technology
| | - Zhengzi Peng
- Department of Food Science and Technology, National Pingtung University of Science and Technology
| | - Litang Wang
- Department of Electrical Engineering, National Central University
| | - Tzuching Wang
- Department of Hospitality Management, Meiho University
| | - Chiching Yang
- Department of Food Science and Technology, National Pingtung University of Science and Technology
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14
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Nomoto Y, Sawada S, Abe S, Wakazawa J, Kikuchi M, Sawai J. Sorbitol Minimizes Calcium Carbonate Scale Generation While Maintaining the Disinfection Effect of Heated Scallop-Shell Powder for Fresh Produce. Biocontrol Sci 2018; 23:157-165. [PMID: 30584202 DOI: 10.4265/bio.23.157] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Scallop shells subjected to heat treatment exhibit antimicrobial activity, and heated scallop-shell powder (HSSP) has recently been reported to be effective for disinfecting food. However, because the main component of these shells is calcium oxide, there is a problem that scales of calcium carbonate (CaCO3) become established on the surface of equipment used for food processing. In this study, we thus investigated whether the addition of sugar to HSSP slurry suppressed CaCO3 scale generation and whether the sugar-supplemented HSSP could be applied to the disinfection and preservation of fresh lettuce. The results showed that glucose, sucrose, and sorbitol could suppress the scale generation in HSSP slurry. However, glucose and sucrose decreased the antibacterial activity of HSSP. Since the addition of sorbitol did not affect the antibacterial activity of HSSP slurry, it was used for subsequent experiments because of its low bioavailability. Sorbitol effectively suppressed scale formation by dissolving it before the addition of HSSP. The disinfection and preservative effects of sorbitol-supplemented HSSP ( S-HSSP) treatment on lettuce did not decrease compared with those upon HSSP treatment and were almost equal to or higher than those of sodium hypochlorite treatment at 200 mg/l. The addition of sorbitol solved the major problem of scale generation by HSSP containing CaO, which contributes to expansion of usage of heated shell powder, such as HSSP, in food processing.
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Affiliation(s)
- Yuri Nomoto
- Faculty of Applied Bioscience, Kanagawa Institute of Technology
| | - Shun Sawada
- Faculty of Applied Bioscience, Kanagawa Institute of Technology
| | - Shinya Abe
- Faculty of Applied Bioscience, Kanagawa Institute of Technology
| | - Jin Wakazawa
- Faculty of Applied Bioscience, Kanagawa Institute of Technology
| | - Mikio Kikuchi
- Faculty of Applied Bioscience, Kanagawa Institute of Technology
| | - Jun Sawai
- Faculty of Applied Bioscience, Kanagawa Institute of Technology
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15
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Strategies for Biofilm Inhibition and Virulence Attenuation of Foodborne Pathogen-Escherichia coli O157:H7. Curr Microbiol 2017; 74:1477-1489. [DOI: 10.1007/s00284-017-1314-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 07/19/2017] [Indexed: 10/19/2022]
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16
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Jung SJ, Park SY, Kim SE, Kang I, Park J, Lee J, Kim CM, Chung MS, Ha SD. Bactericidal Effect of Calcium Oxide (Scallop-Shell Powder) Against Pseudomonas aeruginosa Biofilm on Quail Egg Shell, Stainless Steel, Plastic, and Rubber. J Food Sci 2017. [PMID: 28627772 DOI: 10.1111/1750-3841.13753] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The aim of this study was to evaluate the bactericidal effect of calcium oxide (CaO) against Pseudomonas aeruginosa biofilms on quail eggshells and major egg contacting surfaces (stainless steel, plastic, and rubber). The samples were subjected to CaO treatments (0%, 0.01%, 0.05%, 0.10%, 0.15%, 0.20%, 0.25%, and 0.30%) for 1 min. All the CaO treatments significantly reduced P. aeruginosa biofilms on all tested surfaces as compared to controls. In comparison of biofilm stability, the strongest and most resistant biofilm was formed on eggshell against the CaO treatment, followed by rubber, stainless steel, and plastic. In evaluation of bactericidal effect, the largest reduction (3.16 log CFU) was observed in plastic even at the lowest concentration of CaO (0.01%), whereas the least reduction was found in eggshells, regardless of CaO concentration. In addition, stainless steel showed a significant reduction in biofilm formation at all concentrations except 0.10% to 0.15% CaO. At 0.30% CaO, the reduction of P. aeruginosa in biofilms on stainless steel, plastic, rubber, and eggshell were 5.48, 6.37, 4.87, and 3.14 log CFU/cm2 (CFU/egg), respectively. Biofilm reduction after CaO treatment was also observed by field emission scanning electron microscopy (FE-SEM). Based on the FE-SEM images, we observed that P. aeruginosa biofilms formed compact aggregations on eggshell surfaces with CaO treatments up to 0.30%. More specifically, a 0.20% CaO treatment resulted in the reductions of 3 to 6 log CFU in all materials.
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Affiliation(s)
- Soo-Jin Jung
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
| | - Shin Young Park
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
| | - Seh Eun Kim
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
| | - Ike Kang
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
| | - Jiyong Park
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
| | - Jungwon Lee
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
| | - Chang-Min Kim
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
| | - Myung-Sub Chung
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
| | - Sang-Do Ha
- School of Food Science and Technology, Advanced Food Safety Research group, BrainKorea21 Plus, Chung-Ang Univ., 72-1 Nae-Ri, Daeduck-Myun, Ansung, Kyunggido, 456-756, Republic of Korea.,Dept. of Animal Science, Cal Poly, San Luis Obispo, CA, U.S.A.,Dept. of Biotechnology and Bioproducts Research center, Yonsei Univ., Seoul, Korea.,Join Co., Ltd., Yongin-si, Gyunggi-do, Korea
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17
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Ohshima Y, Takada D, Namai S, Sawai J, Kikuchi M, Hotta M. Antimicrobial Characteristics of Heated Eggshell Powder. Biocontrol Sci 2015; 20:239-46. [PMID: 26699855 DOI: 10.4265/bio.20.239] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Eggshells have high bioavailability and can be used as a source of calcium. The main component is CaCO3, which, when heated, is converted to CaO. Seashells are also mainly composed of CaCO3 and were previously found to exhibit antimicrobial activity after being heated. In this study, heated eggshell powder (HESP) was found to have antimicrobial activity against bacterial vegetative cells, fungi and bacterial spores. Parameters, such as the minimum inhibitory concentration, were determined with kinetic analysis using an indirect conductimetric assay. Moreover, HESP was able to kill the Bacillus subtilis spores. There were no significant differences in the activity between HESP, heated scallop-shell powder and pure CaO. The MIC values for HESP against bacteria and fungi were 0.29-0.43 and 1.3-1.5 mg/mL, respectively. Against B. subtilis spores, a reduction of two orders of magnitude of viability was confirmed following 20 min of treatment at 10 mg/mL at 60 ℃. The active oxygen generated from the HESP slurry was examined with chemiluminescence. The intensity of this increased with increasing concentrations of the HESP slurry. This suggests that HESP could be used as a natural antimicrobial agent. Although a high pH is the main contributor to this antimicrobial activity, active oxygen species generated from HESP are likely to be the main antimicrobial agents..
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Affiliation(s)
- Yuki Ohshima
- Faculty of Applied Bioscience, Kanagawa Institute of Technology
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