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Synthesis, Adsorption Isotherm and Kinetic Study of Alkaline- Treated Zeolite/Chitosan/Fe 3+ Composites for Nitrate Removal from Aqueous Solution-Anion and Dye Effects. Gels 2022; 8:gels8120782. [PMID: 36547306 PMCID: PMC9777915 DOI: 10.3390/gels8120782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 11/25/2022] [Accepted: 11/26/2022] [Indexed: 12/02/2022] Open
Abstract
In the present study, alkaline-treated zeolite/chitosan/Fe3+ (ZLCH-Fe) composites were prepared and analyzed using scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and pH of zero point of charge (pHzpc) to remove nitrates from water. The process was carried out using an adsorption method with a varied initial pH, adsorbent dosage, initial nitrate concentration and contact time. The pHzpc demonstrated that the ZLCH-Fe surface had a positive charge between 2 and 10, making it easier to capture the negative charge of nitrate. However, the optimal pH value is 7. After 270 min, the maximum adsorption capacity and percent removal reached 498 mg/g and 99.64%, respectively. Freundlich and pseudo-second-order were fitted to the adsorption isotherm and kinetic models, respectively. An evaluation was conducted on the effects of anions-SO42- and PO43--and dyes-methylene blue (MB) and acid red 88 (AR88)-upon nitrate removal. The results indicated that the effect of the anion could be inhibited, in contrast to dye effects. However, the optimal pH values were changed to 10 for MB and 2 for AR88, resulting in a hydrogel formation. This might be indicated by the protonation of hydroxyl and amino groups resulting from a chitosan nitrate reaction in the AR88 solution.
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Liu Y, Wang H, Wu L, Han J, Sui B, Meng L, Xu Y, Lu S, Wang H, Peng J. Intestinal changes associated with nitrite exposure in Bufo gargarizans larvae: Histological damage, immune response, and microbiota dysbiosis. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2022; 249:106228. [PMID: 35751941 DOI: 10.1016/j.aquatox.2022.106228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 05/16/2022] [Accepted: 06/15/2022] [Indexed: 06/15/2023]
Abstract
Nitrite is a ubiquitous toxic compound in aquatic ecosystems and has negative effects on aquatic organisms. The intestine and the trillions of microbes that inhabit it, play an integral role in maintaining digestive and immune functions. However, the effects of nitrite on intestinal health and microflora have been poorly investigated. Therefore, the present study evaluated the response of intestinal histology, immunity, digestive enzyme activities and microbiota to nitrite exposure in Bufo gargarizans tadpoles. The results showed that nitrite caused damage to the intestine and impaired digestive performance. Significant changes in the transcriptional profiles of genes involved in oxidative stress (sod, gpx and hsp), inflammation, and immunity (socs3, il-27, il-1β and il-17d) were observed in the NO2-N treatment groups. In addition, exposure to nitrite induced alterations of intestinal microbial diversity, structure and composition, suggesting that nitrite may lead to intestinal microbiota dysbiosis. It is noteworthy that probiotics (e.g., Bacteroidetes and Fusobacteria) were decreased after exposure to nitrite, whereas potentially opportunistic pathogens such as Proteobacteria and Enterobacteriaceae were elevated. Functional prediction and correlation analysis suggested that the above changes may interfere with metabolic function and trigger various diseases. Taken together, we concluded that nitrite exposure induced intestinal microbial dysbiosis, which may lead to immune dysfunction and metabolic disorder, and ultimately to histological damages in B. gargarizans. Further, this study will provide a scientific basis for further understanding the risk of nitrite pollution on the intestinal health of amphibians.
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Affiliation(s)
- Yutian Liu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Hemei Wang
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Lifeng Wu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Jian Han
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Baoying Sui
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Lingna Meng
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Yunxuan Xu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Siwen Lu
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China
| | - Hongyuan Wang
- College of Life Science, Shaanxi Normal University, Xi'an 710119, China.
| | - Jufang Peng
- Basic Experimental Teaching Center, Shaanxi Normal University, Xi'an 710119, China.
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Zhang B, Deng J, Xie J, Wu H, Wei C, Li Z, Qiu G, Wei C, Zhu S. Microbial community composition and function prediction involved in the hydrolytic bioreactor of coking wastewater treatment process. Arch Microbiol 2022; 204:426. [PMID: 35751757 DOI: 10.1007/s00203-022-03052-z] [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: 09/05/2021] [Revised: 04/08/2022] [Accepted: 06/03/2022] [Indexed: 11/25/2022]
Abstract
The hydrolytic acidification process has a strong ability to conduct denitrogenation and increase the biological oxygen demand/chemical oxygen demand ratio in O/H/O coking wastewater treatment system. More than 80% of the total nitrogen (TN) was removed in the hydrolytic bioreactor, and the hydrolytic acidification process contributed to the provision of carbon sources for the subsequent nitrification process. The structure and diversity of microbial communities were elaborated using high-throughput MiSeq of the 16S rRNA genes. The results revealed that the operational taxonomic units (OTUs) belonged to phyla Bacteroidetes, Betaproteobacteria, and Alphaproteobacteria were the dominant taxa involved in the denitrogenation and degradation of refractory contaminants in the hydrolytic bioreactor, with relative abundances of 22.94 ± 3.72, 29.77 ± 2.47, and 18.23 ± 0.26%, respectively. The results of a redundancy analysis showed that the OTUs belonged to the genera Thiobacillus, Rhodoplanes, and Hylemonella in the hydrolytic bioreactor strongly positively correlated with the chemical oxygen demand, TN, and the removal of phenolics, respectively. The results of a microbial co-occurrence network analysis showed that the OTUs belonged to the phylum Bacteroidetes and the genus Rhodoplanes had a significant impact on the efficiency of removal of contaminants that contained nitrogen in the hydrolytic bioreactor. The potential function profiling results indicate the complementarity of nitrogen metabolism, methane metabolism, and sulfur metabolism sub-pathways that were considered to play a significant role in the process of denitrification. These results provide new insights into the further optimization of the performance of the hydrolytic bioreactor in coking wastewater treatment.
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Affiliation(s)
- Baoshan Zhang
- Guangdong Province Key Laboratory for Biotechnology Drug Candidates, School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Jinsi Deng
- Guangdong Province Key Laboratory for Biotechnology Drug Candidates, School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Junting Xie
- Guangdong Province Key Laboratory for Biotechnology Drug Candidates, School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, China
| | - Haizhen Wu
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, China
| | - Cong Wei
- School of Environment and Energy, South China University of Technology, Guangzhou, China
| | - Zemin Li
- School of Environment and Energy, South China University of Technology, Guangzhou, China
| | - Guanglei Qiu
- School of Environment and Energy, South China University of Technology, Guangzhou, China
| | - Chaohai Wei
- School of Environment and Energy, South China University of Technology, Guangzhou, China.
| | - Shuang Zhu
- Guangdong Province Key Laboratory for Biotechnology Drug Candidates, School of Biosciences and Biopharmaceutics, Guangdong Pharmaceutical University, Guangzhou, China.
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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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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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Fukuda K, Sato Y, Ishihara M, Nakamura S, Takayama T, Murakami K, Fujita M, Yokoe H. Skin Cleansing Technique with Disinfectant using Improved High-Velocity Steam-Air Micromist Jet Spray. Biocontrol Sci 2020; 25:35-39. [PMID: 32173665 DOI: 10.4265/bio.25.35] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
Application of a high-velocity steam-air micromist jet spray (HVS-AMJS) with disinfectants for cleansing the skin is proposed. Low-pressure steam is mixed with compressed air in a nozzle and then sprayed onto a surface of skin or material located approximately 22 cm from the nozzle. The temperature on the sprayed surface was controlled between 40ºC and 45 ºC. The improved HVS-AMJS installed scattering prevention cover with tap water effectively removed normal bacterial flora (total viable count and coliform bacteria) from contaminated skin pieces and pig skin wounds. Furthermore, the cleansing efficacy increased by advanced-treating with bio-shell calcium oxide (BiSCaO), hypochlorous acid (HClO), sodium hypochlorite (NaClO), povidone iodine, or chlorhexidine gluconate. Especially, the improved HVS-AMJS combined with BiSCaO had higher bactericidal activity than when combined with other disinfectants. This study suggests that application of the HVS-AMJS with disinfectants, especially BiSCaO, may be useful for skin cleansing to prevent infection.
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Affiliation(s)
- Koichi Fukuda
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Yoko Sato
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Masayuki Ishihara
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Shingo Nakamura
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Tomohiro Takayama
- Department of Oral and Maxillofacial Surgery, National Defense Medical College
| | - Kaoru Murakami
- Department of Oral and Maxillofacial Surgery, National Defense Medical College
| | - Masanori Fujita
- Division of Environmental Medicine, Research Institute, National Defense Medical College
| | - Hidetaka Yokoe
- Department of Oral and Maxillofacial Surgery, National Defense Medical College
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Bioshell Calcium Oxide-Containing Liquids as a Sanitizer for the Reduction of Histamine Production in Raw Japanese Pilchard, Japanese Horse Mackerel, and Chub Mackerel. Foods 2020; 9:foods9070964. [PMID: 32708249 PMCID: PMC7404465 DOI: 10.3390/foods9070964] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 07/14/2020] [Accepted: 07/17/2020] [Indexed: 11/16/2022] Open
Abstract
Recently, there has been an increase in the number of food poisoning cases associated with histamine in food, mainly in relation to histamine in fish. Here, we investigated methods to decrease histamine levels in Japanese pilchard, Japanese horse mackerel, and chub Mackerel, stored at 10 °C using various concentrations of heated scallop bioshell calcium oxide (BiSCaO) suspension, dispersion (BiSCaO + Na2HPO4), colloidal dispersion (BiSCaO + NapolyPO4), scallop shell powder (SSP) Ca(OH)2 in pure water (PW) or saline, and BiSCaO water. BiSCaO in a high alkaline pH solution chemically decomposes histamine poorly, but the partial flocculation/precipitation of histamine was observed with 1 and 0.2 wt.% BiSCaO dispersion and BiSCaO colloidal dispersion, respectively. Cleaning fish samples with BiSCaO suspension, dispersion, colloidal dispersion, or BiSCaO water remarkably reduced histamine levels and normal bacterial flora (coliform bacteria (CF) and total viable bacterial cells (TC)) after storage for four days at 10 °C, while much higher histamine levels were observed after cleaning with saline. These results suggest that cleaning fish with BiSCaO dispersion, colloidal dispersion, or BiSCaO water can significantly reduce histamine levels through their bactericidal activity against histamine-producing bacteria.
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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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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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Sato Y, Ishihara M, Nakamura S, Fukuda K, Kuwabara M, Takayama T, Hiruma S, Murakami K, Fujita M, Yokoe H. Comparison of Various Disinfectants on Bactericidal Activity Under Organic Matter Contaminated Environments. Biocontrol Sci 2019; 24:103-108. [PMID: 31204354 DOI: 10.4265/bio.24.103] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
The bactericidal activity of heated bio-shell calcium oxide (BiSCaO) powder suspension (pH 12.4) , hypochlorous acid (HClO; pH 6), sodium hypochlorite (NaClO; pH 8) , povidone-iodine (Isodine solution®) , and chlorhexidine gluconate (Hibiscrub®) under organic matter contaminated environments were compared for tests conducted on wood scraps and pig skin pieces that were incubated with normal bacterial flora (total viable counts and coliform bacteria) . The test results showed that BiSCaO suspension had higher bactericidal activity than HClO and NaClO. Furthermore, more than 10-fold higher concentrations of antiseptics such as povidone-iodine and chlorhexidine gluconate were required to achieve bactericidal activity comparable to that of BiSCaO suspension. Our results demonstrate the possibility of using BiSCaO suspension under organic matter contaminated environments as a disinfectant for environmental and food hygiene applications.
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Affiliation(s)
- Yoko Sato
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Masayuki Ishihara
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Shingo Nakamura
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Koichi Fukuda
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Masahiro Kuwabara
- Department of Plastic and Reconstructive Surgery, National Defense Medical College
| | - Tomohiro Takayama
- Department of Oral and Maxillofacial Surgery, National Defense Medical College
| | - Sumiyo Hiruma
- Division of Biomedical Engineering, Research Institute, National Defense Medical College
| | - Kaoru Murakami
- Department of Oral and Maxillofacial Surgery, National Defense Medical College
| | - Masanori Fujita
- Division of Environmental Medicine, Research Institute, National Defense Medical College
| | - Hidetaka Yokoe
- Department of Oral and Maxillofacial Surgery, National Defense Medical College
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11
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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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Gholami Z, Abtahi M, Golbini M, Parseh I, Alinejad A, Avazpour M, Moradi S, Fakhri Y, Mousavi Khaneghah A. The concentration and probabilistic health risk assessment of nitrate in Iranian drinking water: a case study of Ilam city. TOXIN REV 2019. [DOI: 10.1080/15569543.2019.1614958] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Zeinab Gholami
- Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mehrnoosh Abtahi
- Environmental and Occupational Hazards Control Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Golbini
- Environment Research Center, Research Institute for Primordial Prevention of Non-communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Iman Parseh
- Department of Environmental Health Engineering, Behbahan faculty of Medical Science, Behbahan, Iran
| | - Abdolazim Alinejad
- Department of Environmental Health Engineering, School of Public Health, Ilam University of Medical Sciences, Ilam, Iran
| | - Moayed Avazpour
- Department of Environmental Health Engineering, School of Public Health, Ilam University of Medical Sciences, Ilam, Iran
| | - Samin Moradi
- Department of Environmental Health, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Yadolah Fakhri
- Department of Environmental Health Engineering, Student Research Committee, School of Public Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Amin Mousavi Khaneghah
- Department of Food Science, Faculty of Food Engineering, University of Campinas (UNICAMP), São Paulo, Brazil
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