Andrezza S. Ramos

Instituto Federal do Amazonas

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Almir Oliveira Neto

National Nuclear Energy Commission

Jaqueline de Araújo Bezerra

Universidade Federal do Amazonas

R.F.B. De Souza

Universidade Estadual de Campinas (UNICAMP)

Marcos B. Machado

Universidade Federal do Amazonas

José de Toledo Piza

Secretaria da Saúde

Edgar Aparecido Sanches

Universidade Federal do Amazonas

Pedro Henrique Campelo

Universidade Federal de Viçosa

Josiana Moreira Mar

Instituto Federal do Amazonas

Monique C.L. Santos

Instituto de Pesquisas Energéticas e Nucleares

Rodrigo Romero Corrêa

Universidade de São Paulo

Cooperative Institutions

Universidade Federal do Amazonas

National Nuclear Energy Commission

Instituto de Pesquisas Energéticas e Nucleares

Instituto Federal do Amazonas

Universidade de São Paulo

Universidade Estadual de Campinas (UNICAMP)

Amazon (United States)

Universidade Federal de São Carlos

Universidade do Estado do Amazonas

Secretaria da Saúde

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cis-[6-(Pyridin-2-yl)-1,3,5-triazine-2,4-diamine](dichloride) Palladium(II)-Based Electrolyte Membrane Reactors for Partial Oxidation Methane to Methanol

ACS Omega (2022)

Luis M. S. Garcia Priscilla J. Zambiazi Khaoula Chair Tuan Duy Doan Andrezza S. Ramos

Methane is an abundant resource and the main constituent of natural gas. It can be converted into higher value-added products and as a subproduct of electricity co-generation. The application of polymer electrolyte reactors for the partial oxidation of methane to methanol to co-generate power and chemical products is a topic of great interest for gas and petroleum industries, especially with the use of materials with a lower amount of metals, such as palladium complex. In this study, we investigate the ideal relationship between cis-[6-(pyridin-2-yl)-1,3,5-triazine-2,4-diamine(dichloride)palladium(II)] (Pd-complex) nanostructure and carbon to obtain a stable, conductive, and functional reagent diffusion electrode. The physical and structural properties of the material were analyzed by Fourier transform infrared (FT-IR) and Raman spectroscopies, transmission electron microscopy (TEM), and X-ray powder diffraction (XRD) techniques. The electrocatalytic activity studies revealed that the most active proportion was 20% of Pd-complex supported on carbon (m/m), which was measured with lower values of open-circuit and power density but with higher efficiency in methanol production with reaction rates of r = 4.2 mol L-1·h-1 at 0.05 V.

Partial oxidation

10.1021/acsomega.2c01463

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Citations (1)

Evaluation of sensory and antioxidant properties of araçá-boi wines as an effect of yeast type, must filtration and fermentation temperature

Chemical Papers (2022)

Pedro Lucas L. Souza Andrezza S. Ramos Alan Diego da Conceição Santos Lúcia Schuch Boeira Jaqueline de Araújo Bezerra

Fractional factorial design

10.1007/s11696-022-02119-x

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Citations (1)

Pedra-ume caá fruit: An Amazon cherry rich in phenolic compounds with antiglycant and antioxidant properties

Food Research International (2019)

Andrezza S. Ramos Josiana Moreira Mar Laiane Souza da Silva Leonard Domingo Rosales Acho Bárbara Janaína P. Silva

Species of Eugenia have been used as an antidiabetic natural source. Chemical, antioxidant and antiglycant screening of extracts from pedra-ume caá (Eugenia punicifolia) fruits were performed. 1H NMR assisted by non-supervised chemometric methods were employed for the evaluation of the chemical profiles which were distinguished according to the color of fruit maturation stages, as well as for pulp and seed fruit. Furthermore, 1H NMR fingerprint analysis of the crude extract allowed the identification of quercitrin and myricitrin, beside other nine compounds. The extracts of the yellow (YP) and green (GP) pulps presented higher antiglycant and antioxidant activities. Fresh juice from E. punicifolia was encapsulated in microcapsules produced with dextrose equivalent (DE) of 10, 20 or 30 as wall materials for the maintainment of their antioxidant and antiglycant properties. The more efficient retention of the bioactive compounds was found using the DE30. The Encapsulation Efficiency (EE) and the Retention Efficiency (RE) of this system was found around 89.7% and 97.6%, respectively. In addition, NMR spectra revealed the presence of flavonoids O-glycosylated (quercitrin and myricitrin) which might be related to the antiglycant and antioxidant activities. The YP presented larger content of quercitrin (117.6 ± 0.4 mg per each 100 g of fresh fruit). Therefore, pedra-ume caá should be employed as an alternative nutraceutical source, as well as intherapeutic pourposes.

Quercitrin

Nutraceutical

10.1016/j.foodres.2019.05.042

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Citations (33)

Sôbre os trabalhos da campanha de combate à esquistossomose no Estado de São Paulo, Brasil

Revista de Saúde Pública (1971)

Andrezza S. Ramos José de Toledo Piza

Foi demonstrado que a esquistossomose está em fase de expansão no Estado de São Paulo, o que vem sendo comprovado através da descoberta de novos focos ativos em municípios onde já havia sido assinalada; da verificação de seu recrudescimento a cada ano pelo registro de novos casos autóctones e, ainda pela observação de focos ativos no início de sua instalação, isto é, captura de planorbídeos naturalmente infectados pelas cercárias do Schistosoma mansoni em localidades onde até o momento não se constatou qualquer caso autóctone da endemia. Foram apresentados informes sobre a incidência da helmintose no Estado de São Paulo: casos autóctones registrados de 1951 até 31 de julho de 1970 - 4.499 distribuídos em 30 municípios; casos importados de outras Unidades da Federação, no período de 1958 a agôsto de 1970, o número registrado é de 7.859. Referem-se também aos trabalhos que vêm sendo executados pela Campanha de Combate à Esquistossomose, destacando-se a política sanitária adotada em relação à parasitose. Informa-se ainda sobre os trabalhos de saneamento ambiental, e o que tem sido realizado em relação ao tratamento dos portadores da infecção. No período de 1969 até julho do corrente ano, foi tratada por moluscicidas uma área de 293.247 m². Quanto aos doentes foram tratados 4.276, pelo Etrenol (Hycanthone).

10.1590/s0034-89101971000200008

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A. darlingi and A. oswaldoi var. metcalfi naturally infected with malarial Parasites in the southern Part of the State of Sâo Paulo.

Rodrigo Romero Corrêa Andrezza S. Ramos

Malarial parasites

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Quantification of ascorbic acid in Amazon fruits

Andrezza S. Ramos João Pedro Gallo de Oliveira Jaqueline de Araújo Bezerra Marcos B. Machado

10.36229/978-65-5866-067-5.cap.14

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Pouteria spp. fruits: Health benefits of bioactive compounds and their potential for the food industry

Food Research International (2023)

Andreza Cavalcante de Oliveira Josiana Moreira Mar Renilto Frota Corrêa Edgar Aparecido Sanches Pedro Henrique Campelo

Health Benefits

Sapotaceae

10.1016/j.foodres.2023.113310

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Citations (3)

Thermal Treatment and High-Intensity Ultrasound Processing to Evaluate the Chemical Profile and Antioxidant Activity of Amazon Fig Juices

Processes (2023)

Josias Martins dos Anjos Cruz Andrezza S. Ramos Renilto Frota Corrêa Edgar Aparecido Sanches Pedro Henrique Campelo

The present paper evaluated the influence of heat treatment (HT) and high-intensity ultrasound (HIUS) on the chemical profile of the Amazon fig (Ficus subapiculata, Moraceae) juices. Antioxidant activity, quantification of carotenoids, total phenolic compounds (TPC), pH, titratable acidity, soluble solids, color and chemical profile (NMR) were evaluated. Treatments did not change the pH (3.4–3.5), titratable acidity (0.044–0.048%) and soluble solids (2.3–2.4 °Brix). The highest antioxidant activity (DPPH, ABTS) and TPC were presented by the HT-treated juice, which was equivalent to 1235 ± 11 µM TE, 1440 ± 13 µM TE and 312 ± 5 mg GAE mL−1, respectively. The treatments influenced the color luminosity according to the L* and a* parameters, while the b* parameter showed no significant change. The L* parameter was elevated in all treated samples compared to the control sample. Analyzing the parameter a* f, it was verified that the sample with thermal treatment (HT) was different from the control sample, but presented similarity with the samples of the HIUS processes. The 1H NMR spectra of the juices showed similar chemical profiles in all treatments. The compounds α-glucose, β-glucose, fructose, citric, malic, quinic, and p-hydroxybenzoic acids were identified. The HT treatment presented higher efficiency to extract the antioxidant compounds from fig juices. The HIUS treatments with constant energy density also improved the tolerance of the antioxidant compounds, especially in conditions of higher potency and reduced time. Future studies will be devoted to carry out microbiological analysis and evaluate the stability of treated juices.

Titratable acid

ABTS

10.3390/pr11020408

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Citations (4)

Methane conversion to higher value-added product and energy co-generation using anodes OF PdCu/C in a solid electrolyte reactor: alkaline fuel cell type monitored by differential mass spectroscopy

Research on Chemical Intermediates (2020)

Camila M. Godoi Monique C.L. Santos A. J. Silva T. L. Tagomori Andrezza S. Ramos

Dimethyl ether

Methyl formate

10.1007/s11164-020-04296-4

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