Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures
The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concent...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Srivastava, Swati [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2017transfer abstract |
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| Umfang: |
9 |
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| Übergeordnetes Werk: |
Enthalten in: The development of a computational platform to design and simulate on-board hydrogen storage systems - Mazzucco, Andrea ELSEVIER, 2017transfer abstract, [Amsterdam] |
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| Übergeordnetes Werk: |
volume:55 ; year:2017 ; pages:11-19 ; extent:9 |
| Links: |
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| DOI / URN: |
10.1016/j.jes.2016.06.016 |
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| 520 | |a The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. | ||
| 520 | |a The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. | ||
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10.1016/j.jes.2016.06.016 doi GBV00000000000076A.pica (DE-627)ELV025451340 (ELSEVIER)S1001-0742(16)30229-7 DE-627 ger DE-627 rakwb eng 690 690 DE-600 660 VZ 620 VZ 610 VZ 44.94 bkl Srivastava, Swati verfasserin aut Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures 2017transfer abstract 9 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. Kumar, Arun oth Enthalten in Elsevier Mazzucco, Andrea ELSEVIER The development of a computational platform to design and simulate on-board hydrogen storage systems 2017transfer abstract [Amsterdam] (DE-627)ELV015065863 volume:55 year:2017 pages:11-19 extent:9 https://doi.org/10.1016/j.jes.2016.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_252 44.94 Hals-Nasen-Ohrenheilkunde VZ AR 55 2017 11-19 9 045F 690 |
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10.1016/j.jes.2016.06.016 doi GBV00000000000076A.pica (DE-627)ELV025451340 (ELSEVIER)S1001-0742(16)30229-7 DE-627 ger DE-627 rakwb eng 690 690 DE-600 660 VZ 620 VZ 610 VZ 44.94 bkl Srivastava, Swati verfasserin aut Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures 2017transfer abstract 9 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. Kumar, Arun oth Enthalten in Elsevier Mazzucco, Andrea ELSEVIER The development of a computational platform to design and simulate on-board hydrogen storage systems 2017transfer abstract [Amsterdam] (DE-627)ELV015065863 volume:55 year:2017 pages:11-19 extent:9 https://doi.org/10.1016/j.jes.2016.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_252 44.94 Hals-Nasen-Ohrenheilkunde VZ AR 55 2017 11-19 9 045F 690 |
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10.1016/j.jes.2016.06.016 doi GBV00000000000076A.pica (DE-627)ELV025451340 (ELSEVIER)S1001-0742(16)30229-7 DE-627 ger DE-627 rakwb eng 690 690 DE-600 660 VZ 620 VZ 610 VZ 44.94 bkl Srivastava, Swati verfasserin aut Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures 2017transfer abstract 9 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. Kumar, Arun oth Enthalten in Elsevier Mazzucco, Andrea ELSEVIER The development of a computational platform to design and simulate on-board hydrogen storage systems 2017transfer abstract [Amsterdam] (DE-627)ELV015065863 volume:55 year:2017 pages:11-19 extent:9 https://doi.org/10.1016/j.jes.2016.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_252 44.94 Hals-Nasen-Ohrenheilkunde VZ AR 55 2017 11-19 9 045F 690 |
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10.1016/j.jes.2016.06.016 doi GBV00000000000076A.pica (DE-627)ELV025451340 (ELSEVIER)S1001-0742(16)30229-7 DE-627 ger DE-627 rakwb eng 690 690 DE-600 660 VZ 620 VZ 610 VZ 44.94 bkl Srivastava, Swati verfasserin aut Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures 2017transfer abstract 9 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. Kumar, Arun oth Enthalten in Elsevier Mazzucco, Andrea ELSEVIER The development of a computational platform to design and simulate on-board hydrogen storage systems 2017transfer abstract [Amsterdam] (DE-627)ELV015065863 volume:55 year:2017 pages:11-19 extent:9 https://doi.org/10.1016/j.jes.2016.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_252 44.94 Hals-Nasen-Ohrenheilkunde VZ AR 55 2017 11-19 9 045F 690 |
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10.1016/j.jes.2016.06.016 doi GBV00000000000076A.pica (DE-627)ELV025451340 (ELSEVIER)S1001-0742(16)30229-7 DE-627 ger DE-627 rakwb eng 690 690 DE-600 660 VZ 620 VZ 610 VZ 44.94 bkl Srivastava, Swati verfasserin aut Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures 2017transfer abstract 9 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. Kumar, Arun oth Enthalten in Elsevier Mazzucco, Andrea ELSEVIER The development of a computational platform to design and simulate on-board hydrogen storage systems 2017transfer abstract [Amsterdam] (DE-627)ELV015065863 volume:55 year:2017 pages:11-19 extent:9 https://doi.org/10.1016/j.jes.2016.06.016 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_24 GBV_ILN_40 GBV_ILN_70 GBV_ILN_252 44.94 Hals-Nasen-Ohrenheilkunde VZ AR 55 2017 11-19 9 045F 690 |
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Comparative cytotoxicity of nanoparticles and ions to Escherichia coli in binary mixtures |
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The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. |
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The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. |
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The objective of this study was to understand toxicity of mixture of nanoparticles (NPs) (ZnO and TiO2) and their ions to Escherichia coli. Results indicated the decrease in percentage growth of E. coli with the increase in concentration of NPs both in single and mixture setups. Even a small concentration of 1mg/L was observed to be significantly toxic to E. coli in binary mixture setup (exposure concentration: 1mg/L ZnO and 1mg/L TiO2; 21.15% decrease in plate count concentration with respect to control). Exposure of E. coli to mixture of NPs at 1000mg/L (i.e., 1000mg/L ZnO and 1000mg/L TiO2) resulted in 99.63% decrease in plate count concentration with respect to control. Toxic effects of ions to E. coli were found to be lesser than their corresponding NPs. The percentage growth reduction was found to be 36% for binary mixture of zinc and titanium ions at the highest concentration (i.e., 803.0mg/L Zn and 593.3mg/L Ti where ion concentrations are equal to the Zn ions present in 1000mg/L ZnO NP solution and Ti+4 ions present in 1000mg/L TiO2 NP solution). Nature of mixture toxicity of the two NPs to E. coli was found to be antagonistic. The alkaline phosphatase (Alp) assay indicated that the maximum damage was observed when E. coli was exposed to 1000mg/L of mixture of NPs. This study tries to fill the knowledge gap on information of toxicity of mixture of NPs to bacteria which has not been reported earlier. |
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