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| Registros recuperados: 2.094 | |
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| Marchand, Michel; Caprais, Jean-claude. |
| The analysis of volatile organic substances requires a specifie methodology. We have taken up the Grob's procedure [1]. Enrichment of the volatile trace organics is performed by close-loop gaseous stripping followed by absorption on a microcharcoal filter. The organic substances are eluted from the charcoal by 15 µ of carbon disulfide and analyzed by high resolution gas chromatography. The recovery of the method (trapping from water, desorption from activated charcoal) is determined for different kinds of volatile organic compounds: saturated hydrocarbons (n-C7 to n-C19), aromatic hydrocarbons (benzene, naphtalene and alkylated compounds) and chloro-aromatic hydrocarbons of benzene and naphthalene. |
| Tipo: Text |
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| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00186/29769/28212.pdf |
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| Rees, Eis; Walker, Ajm. |
| Based on 12 years of sampling in Liverpool Bay a number of spatial and temporal variants of the Abra community can be recognised: a) species poor localities that are consistently dominated by Pectinaria koreni or Abra alba ; b) unstable fluid muds with ephemeral recruitments of Pectinaria ; c) species rich localities with a range of alternative dominants; d) heterogeneous offshore localities that are temporarily colonised by Abra community species. General colonisation events occurred in 1972 and 1978 which may be synchronised with events elsewhere in the North Sea. |
| Tipo: Text |
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| Ano: 1983 |
URL: http://archimer.ifremer.fr/doc/00247/35779/34292.pdf |
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| Sampaio,Vladimir R.; Matsue,Alice Massae; Colombo,Meiribel P.; Olitta,Antonio F.L.; Barbin,Decio. |
| Fez-se a aplicação de giberelinas (50 e 100 ppm) e de clorofenoxipropionamida (250, 500 e 1000 ppm) sobre figos em vários estádios de desenvolvimento, de plantas podadas em dezembro, visando-se à produção de figos fora da época normal. Os resultados demostraram que as giberelinas a 50 ppm provocaram alongamento no comprimento dos figos. O tratamento com clorofenoxipropionamida (Fruitone CPA) a 1000 ppm resultou em frutos mais pesados, porém, estes valores não diferiram estatisticamente daqueles do tratamento controle. O peso médio dos figos foi de 50,0 gramas, para as primeiras oito semanas de colheita, período considerado no experimento. |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 1983 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0071-12761983000100005 |
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| Registros recuperados: 2.094 | |
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