| Registro completo |
| Provedor de dados: |
Animal Sciences
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| País: |
Brazil
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| Título: |
Calcium-free and low-calcium water production for aquaculture research - doi: 10.4025/actascianimsci.v33i1.10686
Calcium-free and low-calcium water production for aquaculture research - doi: 10.4025/actascianimsci.v33i1.10686
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| Autores: |
Pinheiro, Paloma Damasceno; Universidade Federal do Ceará
Cavalcante, Davi de Holanda; Universidade Federal do Ceará
Moraes, Manuella Gazzineo de; Universidade Federal do Ceará
Sá, Marcelo Vinícius do Carmo e; Universidade Federal do Ceará
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| Data: |
2011-02-03
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| Ano: |
2011
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| Palavras-chave: |
EDTA
Calcium hardness
Fish culture EDTA
Calcium hardness
Fish culture
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| Resumo: |
The present work aimed to obtain a mathematical expression to calculate the amount of EDTA required to produce calcium-free and low-calcium water ([Ca2+] < 5 mg L-1). Initially, a pilot test was carried out to confirm the effectiveness of EDTA as a chelating agent of waterborne calcium and to evaluate its effect on water pH. Five application rates of Na-EDTA (25, 50, 75, 100 and 125 mg L-1) were tested. The concentration of calcium in water was determined initially (before the application of EDTA) and after one hour. Linear regression analysis was performed to find out the relationship between the desired calcium concentration in water and the required EDTA: initial calcium hardness ratio. The expression ŷ = -0.0911x + 3.3628 (R² = 0.933) was derived from the linear regression analysis carried out, in which x represents the desired calcium concentration in water and y the required EDTA: initial calcium hardness ratio.
The present work aimed to obtain a mathematical expression to calculate the amount of EDTA required to produce calcium-free and low-calcium water ([Ca2+] < 5 mg L-1). Initially, a pilot test was carried out to confirm the effectiveness of EDTA as a chelating agent of waterborne calcium and to evaluate its effect on water pH. Five application rates of Na-EDTA (25, 50, 75, 100 and 125 mg L-1) were tested. The concentration of calcium in water was determined initially (before the application of EDTA) and after one hour. Linear regression analysis was performed to find out the relationship between the desired calcium concentration in water and the required EDTA: initial calcium hardness ratio. The expression ŷ = -0.0911x + 3.3628 (R² = 0.933) was derived from the linear regression analysis carried out, in which x represents the desired calcium concentration in water and y the required EDTA: initial calcium hardness ratio.
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| Idioma: |
Português
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| Identificador: |
http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10686
10.4025/actascianimsci.v33i1.10686
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| Editor: |
Editora da Universidade Estadual de Maringá
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| Formato: |
application/pdf
application/pdf
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| Fonte: |
Acta Scientiarum. Animal Sciences; v. 33, n. 1 (2011); 47-49
Acta Scientiarum. Animal Sciences; v. 33, n. 1 (2011); 47-49
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| Direitos: |
DECLARATION OF ORIGINALITY AND CESSATION OF COPYRIGHTI Declare that current article is original and has not been submitted for publication, in part or in whole, to any other national or international journal. I also declare that once published in the Acta Scientiarum. Animal Sciences, a publication of the Universidade Estadual de Maringá, it will not be submitted by me or by any co-author to any scientific communication mean. In my name and in the name of co-authors, I shall cede the copyright of the above mentioned article to the Universidade Estadual de Maringá and I declare that I know that the non-observance of this norm may make me liable for the penalties contemplated in the Law for the Protection of Authors’ Rights (Act 9609 of the 19th February 1998).
DECLARAÇÃO DE ORIGINALIDADE E CESSÃO DE DIREITOS AUTORAIS Declaro que o presente artigo é original, não tendo sido submetido à publicação em qualquer outro periódico nacional ou internacional, quer seja em parte ou em sua totalidade. Declaro, ainda, que uma vez publicado na revista Acta Scientiarum. Animal Sciences, editada pela Universidade Estadual de Maringá, o mesmo jamais será submetido por mim ou por qualquer um dos demais co-autores a qualquer outro meio de divulgação científica. Através deste instrumento, em meu nome e em nome dos demais co-autores, porventura existentes, cedo os direitos autorais do referido artigo à Universidade Estadual de Maringá e declaro estar ciente de que a não observância deste compromisso submeterá o infrator a sanções e penas previstas na Lei de Proteção de Direitos Autorias (Nº9609, de 19/02/98).
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