Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Reis BO"'
Autor:
Oliveira AM, Rodrigues CG, Reis Borges A, Martins A, dos Santos SL, Rocha Pires F, Mascarenhas Araújo J, Ramos de Deus J
Publikováno v:
International Journal of General Medicine, Vol 2014, Iss default, Pp 137-141 (2014)
Ana Maria de Oliveira,1 Catarina Graça Rodrigues,1 Alexys Borges,2 Alexandra Martins,1 Sofia Loureiro dos Santos,3 Francisco Rocha Pires,4 João Mascarenhas Araújo,2 João Ramos de Deus1 1Department of Gastroenterology, 2Department of Internal Medi
Externí odkaz:
https://doaj.org/article/5733f068bca44b4caec6e738894a94b0
Publikováno v:
PASOS Revista de Turismo y Patrimonio Cultural, Vol 7, Iss 2, Pp 297-305 (2009)
This article aims, through a theoretical reflection, examining the relationship between the ownership of the territory by the tourist activity and its impacts on culture and the environment, calling attention to the need for sustainable planning in t
Externí odkaz:
https://doaj.org/article/a50f0ec18f8749cbbd0e6891e0d5dddf
Publikováno v:
Journal of the Brazilian Chemical Society, Vol 15, Iss 1, Pp 38-42 (2004)
A flow system is proposed for simultaneous in-line concentration of cations and anions. A sliding-bar commutator was employed to insert an anion and a cation exchange column into a flowing sample stream for serial retention of the analytes. In the in
Externí odkaz:
https://doaj.org/article/2c5b15cf17c44d8184bd7007713aea60
Publikováno v:
Química Nova, Vol 27, Iss 1, Pp 50-54 (2004)
In this work a micro-heater device to be used as an integral part of the flow analysis manifold is described. The usefulness of the device was demonstrated using it in the development of a multicommutated flow analysis procedure for the spectrophotom
Externí odkaz:
https://doaj.org/article/2f3a88e7cdd04ce2bb36877aa9629979
Autor:
Vieira Jonas A., Raimundo Jr. Ivo M., Reis Boaventura F., Montenegro M. Conceição B.S.M., Araújo Alberto N.
Publikováno v:
Journal of the Brazilian Chemical Society, Vol 14, Iss 2, Pp 259-264 (2003)
An automated flow potentiometric titration procedure for the determination of chloride in milk and wine exploiting the monosegmented flow approach is described. The flow network was designed based on a six-way solenoid valve, controlled by a microcom
Externí odkaz:
https://doaj.org/article/ceb8ec9a940b4870b4a05fbae91fde90
Publikováno v:
Journal of the Brazilian Chemical Society, Vol 13, Iss 5, Pp 642-646 (2002)
A flow system for spectrophotometric multidetermination in waters is proposed. Reagent aliquots (25-75 muL) were inserted into the sample stream, allowing up to 4.5-fold increase in sensitivity and an average 12-fold reduction in reagent consumption.
Externí odkaz:
https://doaj.org/article/9eb40deab09146d480562688bf1e2210
Autor:
Gervasio Ana P. G., Miranda Carlos E. S., Luca Gilmara C., Tumang Cristiane A., Campos Luis F. P., Reis Boaventura F.
Publikováno v:
Journal of the Brazilian Chemical Society, Vol 12, Iss 1, Pp 81-86 (2001)
A flow-injection procedure for spectrophotometric determination of phosphorus in electrolytic iron and iron alloys is proposed. The method is based on the ammonium molybdate reaction followed by stannous chloride reduction in acidic medium. In order
Externí odkaz:
https://doaj.org/article/0bb7d90db68145ffbeb5c114cdf147d1
Autor:
Luca Gilmara C., Reis Boaventura F.
Publikováno v:
Química Nova, Vol 24, Iss 2, Pp 191-194 (2001)
A spectrophotometric flow injection analysis (FIA) procedure employing natural urease enzyme source for the determination of urea in animal blood plasma was developed. Among leguminous plants used in the Brazilian agriculture, the Cajanus cajan speci
Externí odkaz:
https://doaj.org/article/1cecdd50eba14777a741756f61f1c3b7
Publikováno v:
Química Nova, Vol 23, Iss 1, Pp 119-125 (2000)
Didactic experiments are proposed in order to demonstrate the characteristics of flow injection analysis and to extend the applications of FIA to the determination of physical chemistry parameters in undergraduate labs. All experiments can be perform
Externí odkaz:
https://doaj.org/article/2c84c0bdead6478eb4dcd9e5c32434eb
Publikováno v:
Journal of the Brazilian Chemical Society, Vol 11, Iss 1, Pp 44-49 (2000)
A flow system for copper on-line preconcentration, employing a tannin resin prepared from Eucalyptus Saligna Sm, with determination by flame atomic absorption spectrometry is proposed. The manifold was designed by assembling an automatic injector-com
Externí odkaz:
https://doaj.org/article/7e6141062bed4b9b8d95db4a1a3c6b67