Alessandra Lopes de Oliveira

Prof. Dr. Alessandra Lopes de Oliveira

orcid

Research Focus & Metrics

Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 January 2011 in The Journal of Supercritical Fluids
Verified
Journal Article
Closed access
HMHugo A. Martinez-Correa
Hugo A. Martinez-Correa
PMPedro M. Magalhães
Pedro M. Magalhães
CQCarmen Lucia Queiroga
Carmen Lucia Queiroga
CPCamila A. Peixoto
Camila A. Peixoto
AOAlessandra Lopes de Oliveira
Alessandra Lopes de Oliveira
FCFernando A. Cabral
Fernando A. Cabral

1 June 2008 in Brazilian Journal of Chemical Engineering
Verified
Journal Article
Open access
PDF file
GSG. F. Silva
G. F. Silva
Felix Martin Carbajal GamarraFelix Martin Carbajal Gamarra
Felix Martin Carbajal Gamarra
AOAlessandra Lopes de Oliveira
Alessandra Lopes de Oliveira
FCF. A. Cabral
F. A. Cabral
The solubility of 93% pure bixin in supercritical carbon dioxide (SC-CO2) and of the bixin present in annatto seeds (Bixa orellana L.) was measured. For the seeds, the measurements were made in a temperature range from 30 to 50ºC and pressure between 10 and 35 MPa and for the pure bixin, at 40ºC from 10 to 35 MPa. The main pigments of annatto seeds are bixin and norbixin, but the extracts only showed the presence of cis and trans-bixin, indicating that norbixin is not soluble in SC-CO2. The annatto seeds used in the experiments contained about 2.7% bixin and 3.1% oil. In the seeds, the crossover point of solubility was at about 28 MPa and values for solubility were about ten times higher than those of the pure bixin, giving evidence that the oil acted as a co-solvent with the CO2.FAPES

1 January 2014 in Journal of Chromatography A
Verified
Journal Article
Closed access
ELEric Lesellier
Eric Lesellier
ALA. Latos
A. Latos
AOAlessandra Lopes de Oliveira
Alessandra Lopes de Oliveira

1 August 2008 in The Journal of Supercritical Fluids
Verified
Journal Article
Closed access
GFGenival L. Filho
Genival L. Filho
Veridiana de RossoVeridiana de Rosso
Veridiana de Rosso
MMMaria Angela Meiireles
Maria Angela Meiireles
PRPaulo Rosa
Paulo Rosa
AOAlessandra Lopes de Oliveira
Alessandra Lopes de Oliveira
FCFernando A. Cabral
Fernando A. Cabral

1 August 2020 in Bioresource Technology
Verified
Journal Article
Closed access
FPFernando Marques Putrino
Fernando Marques Putrino
MTMarcela Tedesco
Marcela Tedesco
RBRenata Barbosa Bodini
Renata Barbosa Bodini
AOAlessandra Lopes de Oliveira
Alessandra Lopes de Oliveira

1 January 2006 in Food Chemistry
Verified
Journal Article
Closed access
AOAlessandra Lopes de Oliveira
Alessandra Lopes de Oliveira
RLRoberta B. Lopes
Roberta B. Lopes
FCFernando A. Cabral
Fernando A. Cabral
MEMarcos N. Eberlin
Marcos N. Eberlin