91 resultados para harmful algal blooms
Filtro por publicador
- Aberdeen University (3)
- Abertay Research Collections - Abertay University’s repository (1)
- Acceda, el repositorio institucional de la Universidad de Las Palmas de Gran Canaria. España (2)
- AMS Tesi di Dottorato - Alm@DL - Università di Bologna (4)
- Aquatic Commons (99)
- Archimer: Archive de l'Institut francais de recherche pour l'exploitation de la mer (6)
- Archive of European Integration (8)
- Archivo Digital para la Docencia y la Investigación - Repositorio Institucional de la Universidad del País Vasco (8)
- Aston University Research Archive (2)
- Biblioteca de Teses e Dissertações da USP (2)
- Biblioteca Digital da Câmara dos Deputados (3)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (9)
- Biblioteca Digital da Produção Intelectual da Universidade de São Paulo (BDPI/USP) (3)
- Biblioteca Digital de la Universidad Católica Argentina (1)
- Biblioteca Digital de Teses e Dissertações Eletrônicas da UERJ (5)
- BORIS: Bern Open Repository and Information System - Berna - Suiça (4)
- Boston College Law School, Boston College (BC), United States (1)
- Brock University, Canada (1)
- Cambridge University Engineering Department Publications Database (2)
- CentAUR: Central Archive University of Reading - UK (14)
- Chinese Academy of Sciences Institutional Repositories Grid Portal (95)
- Cochin University of Science & Technology (CUSAT), India (12)
- Comissão Econômica para a América Latina e o Caribe (CEPAL) (1)
- CORA - Cork Open Research Archive - University College Cork - Ireland (2)
- Cornell: DigitalCommons@ILR (1)
- Dalarna University College Electronic Archive (1)
- Deakin Research Online - Australia (41)
- Department of Computer Science E-Repository - King's College London, Strand, London (1)
- Digital Archives@Colby (1)
- Digital Commons at Florida International University (13)
- DigitalCommons - The University of Maine Research (4)
- DigitalCommons@The Texas Medical Center (1)
- DigitalCommons@University of Nebraska - Lincoln (1)
- DRUM (Digital Repository at the University of Maryland) (3)
- eResearch Archive - Queensland Department of Agriculture; Fisheries and Forestry (14)
- FAUBA DIGITAL: Repositorio institucional científico y académico de la Facultad de Agronomia de la Universidad de Buenos Aires (1)
- FUNDAJ - Fundação Joaquim Nabuco (1)
- Helda - Digital Repository of University of Helsinki (82)
- Illinois Digital Environment for Access to Learning and Scholarship Repository (1)
- Indian Institute of Science - Bangalore - Índia (39)
- Instituto Nacional de Saúde de Portugal (1)
- Instituto Politécnico do Porto, Portugal (1)
- Lume - Repositório Digital da Universidade Federal do Rio Grande do Sul (1)
- Massachusetts Institute of Technology (1)
- Ministerio de Cultura, Spain (1)
- National Center for Biotechnology Information - NCBI (3)
- Plymouth Marine Science Electronic Archive (PlyMSEA) (91)
- Publishing Network for Geoscientific & Environmental Data (75)
- QUB Research Portal - Research Directory and Institutional Repository for Queen's University Belfast (47)
- Queensland University of Technology - ePrints Archive (143)
- Repositório digital da Fundação Getúlio Vargas - FGV (1)
- Repositório Institucional da Universidade de Aveiro - Portugal (1)
- Repositório Institucional da Universidade Federal do Rio Grande - FURG (1)
- Repositorio Institucional de la Universidad de La Laguna (1)
- Repositório Institucional UNESP - Universidade Estadual Paulista "Julio de Mesquita Filho" (14)
- SAPIENTIA - Universidade do Algarve - Portugal (9)
- Universidade Estadual Paulista "Júlio de Mesquita Filho" (UNESP) (1)
- Universidade Federal do Rio Grande do Norte (UFRN) (5)
- Universitat de Girona, Spain (2)
- Université de Montréal (1)
- Université de Montréal, Canada (9)
- University of Connecticut - USA (3)
- University of Michigan (7)
- University of Queensland eSpace - Australia (19)
- University of Washington (1)
Resumo:
The algae represent major producers of calcium carbonate and silica among the world's biota. Calcification involves the precipitation of CaCO3 from Ca2+ and CO32− ions. Algal calcification by coccolithophores may account for up to half of global oceanic CaCO3 production. Silicification, the transformation of silicic acid into skeletal material, occurs in a few algal groups. The abundant diatoms represent the major silicifiers, playing a key role in marine silica cycling. Fossilised diatomaceous deposits have long been exploited for building and filling materials. Biomineralisation of calcium and silicon require homeostatic ion controls that are well characterised for Ca2+ and H+ in coccolithophores. Calcification occurs in an alkalinised vesicle, while silicification requires an acidic pH. Research on silicification remains focused upon cell wall development. Initiation and development of structures that are mineralised intracellularly requires initiation and regulation by organic components within the vesicles. Low-temperature, low-pressure biogenic formation of silica and calcite has potential for biotechnological application in novel industrial processes.