Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/1486
Registo completo
Campo DC | Valor | Idioma |
---|---|---|
dc.contributor.author | Pereira, Martinha | - |
dc.contributor.author | You-Ting Wu | - |
dc.contributor.author | Madeira, Pedro | - |
dc.contributor.author | Venâncio, Armando | - |
dc.contributor.author | Macedo, Eugénia | - |
dc.contributor.author | Teixeira, J. A. | - |
dc.date.accessioned | 2005-05-09T08:41:51Z | - |
dc.date.available | 2005-05-09T08:41:51Z | - |
dc.date.issued | 2004 | - |
dc.identifier.citation | “Journal of chemical & engineering data”. ISSN 0021-9568. 49:1(2004) 43-47. | eng |
dc.identifier.issn | 0021-9568 | - |
dc.identifier.uri | https://hdl.handle.net/1822/1486 | - |
dc.description.abstract | The phase diagrams of Ucon 50-HB-5100 (Ucon) + ammonium sulfate (NH4)(2)SO4 + water, Ucon 50-HB-5100 + poly(vinyl alcohol) 10000 (PVA 10000) + water, Ucon 50-HB-5100 + hydroxypropyl starch (Reppal PES 100) + water, and poly(ethylene glycol) 8000 (PEG 8000)-PVA 10000 systems were determined at 22 degreesC. Measurements at 30 and 40 degreesC were also done for each Ucon-salt system. A linear regression was used to calculate the slope and standard deviation for each tie line. The standard deviations are in most situations lower than 0.1, and the tie-line slopes for each phase diagram vary within 5.5% around the medium value for all cases with the exception of the Ucon + (NH4)(2)SO4 + water system at 40 degreesC. The phase diagrams of the Ucon + (NH4)(2)SO4 + water system at different temperatures were shown to have a smaller amount of salt and polymer than conventional systems and to be thermoseparating, versatile, and particularly attractive, since phase formation is temperature-dependent. The phase diagrams of Ucon + PVA 10000 + water, Ucon + PES + water, and PEG + PVA 10000 + water systems were very similar, since high polymer concentrations (PES or PVA 10000) are required to form the two phases. | eng |
dc.description.sponsorship | Fundação para a Ciência e a Tecnologia (FCT) – PRAXIS XXI. | eng |
dc.description.sponsorship | Fundação para a Ciência e a Tecnologia (FCT) – Programa Operacional “Ciência, Tecnologia, Inovação” (POCTI) - POCTI/EQU/33185/99. | - |
dc.description.sponsorship | CEC - INCO-DC - contract number ERB IC18 CT97 0182. | - |
dc.language.iso | eng | eng |
dc.publisher | American Chemical Society | eng |
dc.rights | openAccess | eng |
dc.title | Liquid-liquid equilibrium phase diagrams of new aqueous two-phase systems : Ucon 50-HB5100 + Ammonium Sulfate + water, Ucon 50-HB5100 + Poly(vinyl alcohol) + water, Ucon 50-HB5100 + Hydroxypropyl Starch + water, and Poly(ethylene glycol) 8000 + Poly(vinyl alcohol) + water | eng |
dc.type | article | eng |
dc.peerreviewed | yes | eng |
oaire.citationStartPage | 43 | - |
oaire.citationEndPage | 47 | - |
oaire.citationIssue | 1 | - |
oaire.citationVolume | 49 | - |
dc.identifier.doi | 10.1021/je034038d | - |
dc.subject.wos | Science & Technology | - |
sdum.journal | Journal of Chemical & Engineering Data | - |
Aparece nas coleções: | CEB - Publicações em Revistas/Séries Internacionais / Publications in International Journals/Series |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
2004-34.pdf | 79,6 kB | Adobe PDF | Ver/Abrir |