Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture
Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Réveillon, Damien [verfasserIn] |
|---|
| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2016transfer abstract |
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| Schlagwörter: |
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| Umfang: |
6 |
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| Übergeordnetes Werk: |
Enthalten in: LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION - Achtem, L. ELSEVIER, 2014, Amsterdam [u.a.] |
|---|---|
| Übergeordnetes Werk: |
volume:58 ; year:2016 ; pages:45-50 ; extent:6 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.hal.2016.07.008 |
|---|
| Katalog-ID: |
ELV029642337 |
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| 245 | 1 | 0 | |a Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture |
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| 520 | |a Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. | ||
| 520 | |a Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. | ||
| 650 | 7 | |a BMAA |2 Elsevier | |
| 650 | 7 | |a DAB |2 Elsevier | |
| 650 | 7 | |a Bacteria |2 Elsevier | |
| 650 | 7 | |a Diatoms |2 Elsevier | |
| 650 | 7 | |a Phaeodactylum tricornutum |2 Elsevier | |
| 700 | 1 | |a Séchet, Véronique |4 oth | |
| 700 | 1 | |a Hess, Philipp |4 oth | |
| 700 | 1 | |a Amzil, Zouher |4 oth | |
| 773 | 0 | 8 | |i Enthalten in |n Elsevier Science |a Achtem, L. ELSEVIER |t LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION |d 2014 |g Amsterdam [u.a.] |w (DE-627)ELV017599377 |
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10.1016/j.hal.2016.07.008 doi GBVA2016007000026.pica (DE-627)ELV029642337 (ELSEVIER)S1568-9883(16)30201-3 DE-627 ger DE-627 rakwb eng 580 580 DE-600 610 VZ 600 540 VZ Réveillon, Damien verfasserin aut Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. BMAA Elsevier DAB Elsevier Bacteria Elsevier Diatoms Elsevier Phaeodactylum tricornutum Elsevier Séchet, Véronique oth Hess, Philipp oth Amzil, Zouher oth Enthalten in Elsevier Science Achtem, L. ELSEVIER LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION 2014 Amsterdam [u.a.] (DE-627)ELV017599377 volume:58 year:2016 pages:45-50 extent:6 https://doi.org/10.1016/j.hal.2016.07.008 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 58 2016 45-50 6 045F 580 |
| spelling |
10.1016/j.hal.2016.07.008 doi GBVA2016007000026.pica (DE-627)ELV029642337 (ELSEVIER)S1568-9883(16)30201-3 DE-627 ger DE-627 rakwb eng 580 580 DE-600 610 VZ 600 540 VZ Réveillon, Damien verfasserin aut Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. BMAA Elsevier DAB Elsevier Bacteria Elsevier Diatoms Elsevier Phaeodactylum tricornutum Elsevier Séchet, Véronique oth Hess, Philipp oth Amzil, Zouher oth Enthalten in Elsevier Science Achtem, L. ELSEVIER LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION 2014 Amsterdam [u.a.] (DE-627)ELV017599377 volume:58 year:2016 pages:45-50 extent:6 https://doi.org/10.1016/j.hal.2016.07.008 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 58 2016 45-50 6 045F 580 |
| allfields_unstemmed |
10.1016/j.hal.2016.07.008 doi GBVA2016007000026.pica (DE-627)ELV029642337 (ELSEVIER)S1568-9883(16)30201-3 DE-627 ger DE-627 rakwb eng 580 580 DE-600 610 VZ 600 540 VZ Réveillon, Damien verfasserin aut Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. BMAA Elsevier DAB Elsevier Bacteria Elsevier Diatoms Elsevier Phaeodactylum tricornutum Elsevier Séchet, Véronique oth Hess, Philipp oth Amzil, Zouher oth Enthalten in Elsevier Science Achtem, L. ELSEVIER LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION 2014 Amsterdam [u.a.] (DE-627)ELV017599377 volume:58 year:2016 pages:45-50 extent:6 https://doi.org/10.1016/j.hal.2016.07.008 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 58 2016 45-50 6 045F 580 |
| allfieldsGer |
10.1016/j.hal.2016.07.008 doi GBVA2016007000026.pica (DE-627)ELV029642337 (ELSEVIER)S1568-9883(16)30201-3 DE-627 ger DE-627 rakwb eng 580 580 DE-600 610 VZ 600 540 VZ Réveillon, Damien verfasserin aut Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. BMAA Elsevier DAB Elsevier Bacteria Elsevier Diatoms Elsevier Phaeodactylum tricornutum Elsevier Séchet, Véronique oth Hess, Philipp oth Amzil, Zouher oth Enthalten in Elsevier Science Achtem, L. ELSEVIER LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION 2014 Amsterdam [u.a.] (DE-627)ELV017599377 volume:58 year:2016 pages:45-50 extent:6 https://doi.org/10.1016/j.hal.2016.07.008 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 58 2016 45-50 6 045F 580 |
| allfieldsSound |
10.1016/j.hal.2016.07.008 doi GBVA2016007000026.pica (DE-627)ELV029642337 (ELSEVIER)S1568-9883(16)30201-3 DE-627 ger DE-627 rakwb eng 580 580 DE-600 610 VZ 600 540 VZ Réveillon, Damien verfasserin aut Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture 2016transfer abstract 6 nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. BMAA Elsevier DAB Elsevier Bacteria Elsevier Diatoms Elsevier Phaeodactylum tricornutum Elsevier Séchet, Véronique oth Hess, Philipp oth Amzil, Zouher oth Enthalten in Elsevier Science Achtem, L. ELSEVIER LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION 2014 Amsterdam [u.a.] (DE-627)ELV017599377 volume:58 year:2016 pages:45-50 extent:6 https://doi.org/10.1016/j.hal.2016.07.008 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U SSG-OLC-PHA AR 58 2016 45-50 6 045F 580 |
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English |
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Enthalten in LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION Amsterdam [u.a.] volume:58 year:2016 pages:45-50 extent:6 |
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Enthalten in LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION Amsterdam [u.a.] volume:58 year:2016 pages:45-50 extent:6 |
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LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION |
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LIFE AFTER TAVI: EXPLORING PATIENTS' PERCEIVED HEALTH STATUS AFTER TRANSCATHETER AORTIC VALVE IMPLANTATION |
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production of bmaa and dab by diatoms (phaeodactylum tricornutum, chaetoceros sp., chaetoceros calcitrans and, thalassiosira pseudonana) and bacteria isolated from a diatom culture |
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Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture |
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Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. |
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Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. |
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Microalgae have previously been reported to contain β-N-methylamino-l-alanine (BMAA), and the global presence of these primary producers has been associated with the widespread occurrence of BMAA in marine organisms. It has been repeatedly shown that filter-feeding bivalves accumulate phytoplankton species and their toxins. In this study, the concentrations of total soluble BMAA and DAB as a function of growth phase were observed for four non-axenic diatom species (i.e. Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and Thalassiosira pseudonana). These strains had previously been shown to contain BMAA using a highly selective HILIC-MS/MS method. BMAA cell quota appeared to be species-specific, however, highest BMAA concentrations were always obtained during the stationary growth phase, for all four species, suggesting that BMAA is a secondary metabolite. While DAB was detected in a bacterial culture isolated from a culture of P. tricornutum, the presence or absence of a bacterial population did not influence production of BMAA and DAB by P. tricornutum, i.e. no significant difference was noted for BMAA and DAB production between axenic and non-axenic cultures. The presence of DAB in bacteria had previously been shown, and raised the question as to whether DAB observed in many species of microalgae may arise from the non-axenic culture conditions or from the microalgae themselves. |
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Production of BMAA and DAB by diatoms (Phaeodactylum tricornutum, Chaetoceros sp., Chaetoceros calcitrans and, Thalassiosira pseudonana) and bacteria isolated from a diatom culture |
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