Search | SciELO

Polysaccharide-based prodrugs formed via pH-responsive covalent interactions can be used to prepare nanoparticles for drug delivery to tumor cells. This study reports the synthesis of cashew gum-doxorubicin prodrugs via Schiff base (CG-S-DOX) and amide bonds (CG-A-DOX), both of which exhibit pH-responsive behavior. Synthesis was confirmed using spectroscopic techniques. Drug-binding content and efficiency were higher for CG-S-DOX than for CG-A-DOX. The capacity of the nanoparticles to self-organize in aqueous media was confirmed using fluorescence spectroscopy, dynamic light scattering, and atomic force microscopy. Both prodrugs possessed sizes < 200 nm and showed responsive doxorubicin-release profiles in the acidic tumor cell microenvironment. Compared with free DOX, the CG-S-DOX and CG-A-DOX prodrug had significantly reduced cytotoxicity against non-tumor cells (L929). CG-S-DOX, but not CG-A-DOX, showed antitumor activity against HCT-116 (human colorectal cancer) and MCF-7 (human breast cancer) cells. An uptake assay confirmed that the nanoparticles were easily taken up by HCT-116 cells. These results together with the great reduction in cytotoxicity against non-tumor cells, confirm the potential of CG-S-DOX prodrug nanoparticles as a reliable and efficient system for the effective delivery of doxorubicin to tumor cells. Polysaccharidebased Polysaccharide based pHresponsive pH gumdoxorubicin gum CGSDOX CG S DOX (CG-S-DOX CGADOX, CGADOX A , (CG-A-DOX) behavior techniques Drugbinding Drug binding CGADOX. DOX. selforganize self organize spectroscopy scattering microscopy 20 doxorubicinrelease release microenvironment nontumor non L929. L929 L . (L929) CGSDOX, HCT116 HCT 116 HCT-11 human cancer MCF7 MCF 7 MCF- (CG-A-DOX 2 L92 (L929 HCT11 11 HCT-1 L9 (L92 HCT1 1 HCT- (L9 (L

https://doi.org/10.21577/0103-5053.20240087

Stable and Thermo-Responsive Dextran Sulfate-Graft-PNIPAm Amphiphilic Nanoparticles for Potential Target Methotrexate Delivery ThermoResponsive Thermo Responsive SulfateGraftPNIPAm Sulfate Graft PNIPAm
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Santos, Aline T. dos

; Silva, Emerson L. da

; Montenegro, Raquel C.

; Sousa, Jeanlex S. de

; Paula, Regina C. M. de

; Feitosa, Judith P. A.

Journal of the Brazilian Chemical Society

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2023, Volume 34 N. 9 Pages 1262 - 1272

Abstract: En | Text: En | PDF: En

Thermo-responsive copolymers grafted with N-isopropylacrylamide (NIPAm) are excellent candidates for drug release. Dextran sulfate (DS) acts as a specific ligand in inflamed regions, turning it highly useful as a target for drug delivery. DS was associated with NIPAm to produce amphiphilic graft copolymers prepared via free radicals. The molar ratio of feed reagents NIPAm/DS varied from 1 (DS-g-PNIPAm) to 4 (DS-g-4PNIPAm). The synthesis was confirmed by spectroscopic techniques (Fourier transform infrared (FTIR) and nuclear magnetic resonance (NMR)). All copolymers showed self-organization capacity in an aqueous medium in temperatures higher than 34 °C, and sizes less than 300 nm. DS-g-3PNIPAm exhibited stability in water and in phosphate buffer at pH 7.4. Scanning electron microscopy confirmed their spherical shape. This copolymer showed specificity to leukemic cells, and normal cells’ proliferation. Methotrexate (MTX) is a very low water-soluble drug used for rheumatoid arthritis and cancer. Unfortunately, MTX have severe collateral effects. MTX-loaded nanoparticles can overcome such issues as well as enhance bioactivity and stability. The MTX was encapsulated and delivered from the DS-g-3PNIPAm with potential target delivery due to the presence of DS. Comparison with MTX encapsulated in other nanoparticles reveals that the DS-g-PNIPam presents the best performance among the thermo-responsive and the second among the target MTX nanocarriers. Thermoresponsive Thermo responsive Nisopropylacrylamide N isopropylacrylamide (NIPAm release (DS regions radicals NIPAmDS DSgPNIPAm g PNIPAm (DS-g-PNIPAm DSg4PNIPAm. DSg4PNIPAm 4PNIPAm . (DS-g-4PNIPAm) Fourier FTIR (FTIR NMR. NMR (NMR)) selforganization self organization 3 C °C 30 nm DSg3PNIPAm 3PNIPAm 74 7 7.4 shape cells proliferation (MTX watersoluble soluble cancer Unfortunately effects MTXloaded loaded DSgPNIPam PNIPam thermoresponsive thermo nanocarriers DSg (DS-g-4PNIPAm (NMR) 7. (NMR

https://doi.org/10.21577/0103-5053.20230037

Zika virus infection among symptomatic patients from two healthcare centers in Sao Paulo State, Brazil: prevalence, clinical characteristics, viral detection in body fluids and serodynamics
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Tozetto-Mendoza, Tania Regina

; Avelino-Silva, Vivian Iida

; Fonseca, Silvia

; Claro, Ingra Morales

; Paula, Anderson Vicente de

; Levin, Anna Sara

; Sabino, Ester Cerdeira

; Mendes-Correa, Maria Cassia

; Figueiredo, Walter Manso

; Felix, Alvina Clara

; Souza, Nathalia C. Santiago

; Costa, Angela Aparecida

; Inenami, Marta

; Silva, Rosangela M. Gasparetto da

; Levi, José Eduardo

; Romano, Camila Malta

; Paranhos-Baccalà, Glaucia

; Segurado, Aluisio Cotrim

; Mayaud, Philippe

Revista do Instituto de Medicina Tropical de São Paulo

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2019, Volume 61 elocation e19

Abstract: En | Text: En | PDF: En

ABSTRACT Zika virus (ZIKV) clinical presentation and frequency/duration of shedding need further clarification. Symptomatic ZIKV-infected individuals identified in two hospitals in Sao Paulo State, Brazil, were investigated regarding clinical characteristics, shedding in body fluids, and serodynamics. Ninety-four of 235 symptomatic patients (Site A: 58%; Site B: 16%) had Real-Time PCR-confirmed ZIKV infection; fever, headache and gastrointestinal symptoms were less frequent, and rash was more frequent compared to ZIKV-negative patients. Real-Time PCR in serum had worse performance compared to plasma, while urine had the highest sensitivity. Shedding in genital fluids and saliva was rare. IgM positivity was the highest <14 days after the symptoms onset (86%), decreasing >28 days (24%); IgG positivity increased >14 days (96%) remaining positive in 94% of patients >28 days. ZIKV prevalence varied importantly in two neighboring cities during the same transmission season. Urine Real-Time PCR can improve diagnostic sensitivity; serum testing is less useful. Accurate serological tests are needed to improve diagnosis and surveillance.

https://doi.org/10.1590/s1678-9946201961019 2345 downloads

Frequency and carbapenems susceptibility profile of non-fermenting Gram-negative bacilli isolated from clinical samples between 2007 and 2012
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Paula, Milena Cristina de

; Monteiro, Rachel M.

; Domingues, Pedro C. A.

; Hermann, Paula Regina S.

; Andrade, Denise de

; Ferreira, Adriano M.

; Watanabe, Evandro

Jornal Brasileiro de Patologia e Medicina Laboratorial

Journal Metrics
- Sobre o periódico
- SciELO Analytics

feb 2018, Volume 54 N. 1 Pages 5 - 8

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO Introdução: Um dos grandes problemas nos serviços de saúde é a ocorrência de infecções relacionadas com assistência à saúde (IRAS) por microrganismos resistentes a vários antimicrobianos. Objetivos: Descrever a frequência e o perfil de suscetibilidade de Pseudomonas aeruginosa e Acinetobacter baumannii aos carbapenêmicos no hospital da Fundação Santa Casa de Franca, São Paulo, Brasil. Métodos: Retrospectivamente, a suscetibilidade de P. aeruginosa e A. baumannii aos carbapenêmicos foi analisada em 304 isolados clínicos entre 2007 e 2012, a partir de um banco de dados do setor de microbiologia do laboratório clínico do hospital da Fundação Santa Casa de Franca, São Paulo, Brasil. Resultados: Das cepas isoladas e identificadas, 236 (5,3%) P. aeruginosa eram suscetíveis a imipenem (2007 - 69,6% a 2012 - 41,7%) e meropenem (2007 - 63,3% a 2012 - 25%). Além disso, todos os 68 (1,7%) isolados de A. baumannii eram suscetíveis aos dois antibióticos. Conclusão: Não foi identificada resistência de A. baumannii aos carbapenêmicos, no entanto houve diminuição da suscetibilidade aos carbapenêmicos no decorrer dos anos para P. aeruginosa.

ABSTRACT Introduction: One of the major problems in health services is the occurrence of healthcare-associated infections (HAIs) by microorganisms resistant to various antimicrobials. Objectives: To describe the frequency and susceptibility profile of Pseudomonas aeruginosa and Acinetobacter baumannii to carbapenems in the hospital from Fundação Santa Casa de Franca, São Paulo, Brazil. Methods: The susceptibility of P. aeruginosa and A. baumannii to carbapenems from 304 clinical isolates between 2007 and 2012 was retrospectively analyzed from a microbiology database at the clinical laboratory of the hospital of Fundação Santa Casa de Franca, São Paulo, Brazil. Results: From isolated and identified strains, 236 (5.3%) P. aeruginosa were susceptible to imipenem (2007 - 69.6% to 2012 - 41.7%) and meropenem (2007 - 63.3% to 2012 - 25%). In addition, all 68 (1.7%) A. baumannii isolates were susceptible to both antibiotics. Conclusion: A. baumannii resistance to carbapenems was not identified; however, there was a decrease in susceptibility to carbapenems over the years for P. aeruginosa.

https://doi.org/10.5935/1676-2444.20180001 852 downloads

Streptococcus Mutans Biofilm Influences on the Antimicrobial Properties of Glass Ionomer Cements
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Fúcio, Suzana B. P.

; Paula, Andréia B. de

; Sardi, Janaina C. O.

; Duque, Cristiane

; Correr-Sobrinho, Lourenço

; Puppin-Rontani, Regina M.

Brazilian Dental Journal

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2016, Volume 27 N. 6 Pages 681 - 687

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo O objetivo neste estudo foi avaliar in vitro as propriedades antibacterianas e a inibição do biofilme de cimentos de ionômero de vidro restauradores. Ketac Nano, Vitremer, Ketac Molar Easymix and Fuji IX foram avaliados através dos seguintes testes: a) teste de difusão em ágar para avaliar a inibição de S. mutans nos cimentos (n=8); b) adesão de S. mutans pela contagem de unidades formadoras de colônia após 2h de exposição material/bactéria (n=10); c) peso do biofilme úmido após sete dias de acúmulo bacteriano nos discos do material, com meio de cultura renovado após 48 h (n=10); d) mensuração do pH e liberação de flúor do meio aspirado nos intervalos de 48 h durante 7 dias de crescimento do biofilme (n=10). Os dados dos testes a, b e c foram submetidos aos testes Kruskal-Wallis e Mann-Whitney e os dados de liberação de flúor e pH a ANOVA dois fatores e Tukey (a = 5%). Vitremer seguido pelo Ketac Nano mostrou maior zona de inibição contra S. mutans quando comparados aos ionômeros convencionais. Vitremer também apresentou valores de pH mais elevados do que Ketac Nano e Fuji IX nas primeiras 48 h e liberou maior quantidade de flúor do que Ketac Nano e Ketac Molar Easymix durante todo o período experimental. A composição química dos ionômeros de vidro restauradores influenciou nas propriedades antibacterianas. O ionômero de vidro modificado por resina (Vitremer) foi mais eficaz na inibição de S. mutans e permitiu maior neutralização do pH nas primeiras 48 h. No entanto, o tipo de ionômero de vidro (modificado por resina ou convencional) não influenciou no peso e adesão do biofilme e na liberação de flúor.

Abstract The aim of this study was to evaluate the in vitro antibacterial and biofilm inhibition properties of glass ionomer restorative cements. Ketac Nano, Vitremer, Ketac Molar Easymix and Fuji IX were analyzed using the following tests: a) agar plate diffusion test to evaluate the inhibitory activity of cements against S. mutans (n=8); b) S. mutans adherence test by counting colony-forming units after 2 h of material/bacteria exposure (n=10); c) biofilm wet weight after seven days of bacterial accumulation on material disks, with growth medium renewed every 48 h (n=10); d) pH and fluoride measurements from the medium aspired at 48 h intervals during the 7-day biofilm development (n=10). Data from the a, b and c tests were submitted to Kruskal-Wallis and Mann-Whitney tests and the fluoride-release and pH data were submitted to two-way ANOVA and Tukey tests (a=5%). Vitremer followed by Ketac Nano showed the greatest inhibitory zone against S. mutans than the conventional ionomers. Vitremer also showed higher pH values than Ketac Nano and Fuji IX in the first 48 h and released higher fluoride amount than Ketac Nano e Ketac Molar Easymix throughout the experimental period. The chemical composition of restorative glass ionomer materials influenced the antibacterial properties. The resin modified glass ionomer (Vitremer) was more effective for inhibition of S. mutans and allowed greater neutralization of the pH in the first 48 h. However, the type of glass ionomer (resin modified or conventional) did not influence the weight and adherence of the biofilm and fluoride release.

https://doi.org/10.1590/0103-6440201600655 2870 downloads

Novel and Fast Microwave-Assisted Synthesis of Carbon Quantum Dots from Raw Cashew Gum
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Pires, Natalia R.

; Santos, Clara M. W.

; Sousa, Rayane R.

; Paula, Regina C. M. de

; Cunha, Pablyana L. R.

; Feitosa, Judith P. A.

Journal of the Brazilian Chemical Society

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2015, Volume 26 N. 6 Pages 1274 - 1282

Abstract: En | Text: En | PDF: En

Carbon quantum dots (C-dots) with average size of 9 nm were synthesized from an aqueous solution of raw cashew gum (RCG) using a novel and fast microwave-assisted technique which involves two steps. In the first step (partial depolymerization in solution) some monomer units are formed through the autohydrolysis of CG and a small amount of 5-hydroxymethyl furfural can be obtained. The second step involves polycondensation/polymerization to give rise to a polyfuranic structure followed by aromatization/carbonization and nuclear burst. At the end of the process a composite of partially depolymerized CG and C-dot was formed. A mechanism involved in microwave-assisted two-steps synthesis was suggested. Although no passivation reagent was used, an intensely blue photoluminescent material in UV light was obtained. C-dot was characterized by spectroscopy in the medium infrared, thermal analysis, gel permeation chromatography, transmission electron microscopy, zeta potential, and photoluminescence.

https://doi.org/10.5935/0103-5053.20150094 7079 downloads

Growing knowledge: an overview of Seed Plant diversity in Brazil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Zappi, Daniela C.

; Filardi, Fabiana L. Ranzato

; Leitman, Paula

; Souza, Vinícius C.

; Walter, Bruno M.T.

; Pirani, José R.

; Morim, Marli P.

; Queiroz, Luciano P.

; Cavalcanti, Taciana B.

; Mansano, Vidal F.

; Forzza, Rafaela C.

; Abreu, Maria C.

; Acevedo-Rodríguez, Pedro

; Agra, Maria F.

; Almeida Jr., Eduardo B.

; Almeida, Gracineide S.S.

; Almeida, Rafael F.

; Alves, Flávio M.

; Alves, Marccus

; Alves-Araujo, Anderson

; Amaral, Maria C.E.

; Amorim, André M.

; Amorim, Bruno

; Andrade, Ivanilza M.

; Andreata, Regina H.P.

; Andrino, Caroline O.

; Anunciação, Elisete A.

; Aona, Lidyanne Y.S.

; Aranguren, Yani

; Aranha Filho, João L.M.

; Araújo, Andrea O.

; Araújo, Ariclenes A.M.

; Araújo, Diogo

; Arbo, María M.

; Assis, Leandro

; Assis, Marta C.

; Assunção, Vivian A.

; Athiê-Souza, Sarah M.

; Azevedo, Cecilia O.

; Baitello, João B.

; Barberena, Felipe F.V.A.

; Barbosa, Maria R.V.

; Barros, Fábio

; Barros, Lucas A.V.

; Barros, Michel J.F.

; Baumgratz, José F.A.

; Bernacci, Luis C.

; Berry, Paul E.

; Bigio, Narcísio C.

; Biral, Leonardo

; Bittrich, Volker

; Borges, Rafael A.X.

; Bortoluzzi, Roseli L.C.

; Bove, Cláudia P.

; Bovini, Massimo G.

; Braga, João M.A.

; Braz, Denise M.

; Bringel Jr., João B.A.

; Bruniera, Carla P.

; Buturi, Camila V.

; Cabral, Elza

; Cabral, Fernanda N.

; Caddah, Mayara K.

; Caires, Claudenir S.

; Calazans, Luana S.B.

; Calió, Maria F.

; Camargo, Rodrigo A.

; Campbell, Lisa

; Canto-Dorow, Thais S.

; Carauta, Jorge P.P.

; Cardiel, José M.

; Cardoso, Domingos B.O.S.

; Cardoso, Leandro J.T.

; Carneiro, Camila R.

; Carneiro, Cláudia E.

; Carneiro-Torres, Daniela S.

; Carrijo, Tatiana T.

; Caruzo, Maria B.R.

; Carvalho, Maria L.S.

; Carvalho-Silva, Micheline

; Castello, Ana C.D.

; Cavalheiro, Larissa

; Cervi, Armando C.

; Chacon, Roberta G.

; Chautems, Alain

; Chiavegatto, Berenice

; Chukr, Nádia S.

; Coelho, Alexa A.O.P.

; Coelho, Marcus A.N.

; Coelho, Rubens L.G.

; Cordeiro, Inês

; Cordula, Elizabeth

; Cornejo, Xavier

; Côrtes, Ana L.A.

; Costa, Andrea F.

; Costa, Fabiane N.

; Costa, Jorge A.S.

; Costa, Leila C.

; Costa-e-Silva, Maria B.

; Costa-Lima, James L.

; Cota, Maria R.C.

; Couto, Ricardo S.

; Daly, Douglas C.

; De Stefano, Rodrigo D.

; De Toni, Karen

; Dematteis, Massimiliano

; Dettke, Greta A.

; Di Maio, Fernando R.

; Dórea, Marcos C.

; Duarte, Marília C.

; Dutilh, Julie H.A.

; Dutra, Valquíria F.

; Echternacht, Lívia

; Eggers, Lilian

; Esteves, Gerleni

; Ezcurra, Cecilia

; Falcão Junior, Marcus J.A.

; Feres, Fabíola

; Fernandes, José M.

; Ferreira, D.M.C.

; Ferreira, Fabrício M.

; Ferreira, Gabriel E.

; Ferreira, Priscila P.A.

; Ferreira, Silvana C.

; Ferrucci, Maria S.

; Fiaschi, Pedro

; Filgueiras, Tarciso S.

; Firens, Marcela

; Flores, Andreia S.

; Forero, Enrique

; Forster, Wellington

; Fortuna-Perez, Ana P.

; Fortunato, Reneé H.

; Fraga, Cléudio N.

; França, Flávio

; Francener, Augusto

; Freitas, Joelcio

; Freitas, Maria F.

; Fritsch, Peter W.

; Furtado, Samyra G.

; Gaglioti, André L.

; Garcia, Flávia C.P.

; Germano Filho, Pedro

; Giacomin, Leandro

; Gil, André S.B.

; Giulietti, Ana M.

; A.P.Godoy, Silvana

; Goldenberg, Renato

; Gomes da Costa, Géssica A.

; Gomes, Mário

; Gomes-Klein, Vera L.

; Gonçalves, Eduardo Gomes

; Graham, Shirley

; Groppo, Milton

; Guedes, Juliana S.

; Guimarães, Leonardo R.S.

; Guimarães, Paulo J.F.

; Guimarães, Elsie F.

; Gutierrez, Raul

; Harley, Raymond

; Hassemer, Gustavo

; Hattori, Eric K.O.

; Hefler, Sonia M.

; Heiden, Gustavo

; Henderson, Andrew

; Hensold, Nancy

; Hiepko, Paul

; Holanda, Ana S.S.

; Iganci, João R.V.

; Imig, Daniela C.

; Indriunas, Alexandre

; Jacques, Eliane L.

; Jardim, Jomar G.

; Kamer, Hiltje M.

; Kameyama, Cíntia

; Kinoshita, Luiza S.

; Kirizawa, Mizué

; Klitgaard, Bente B.

; Koch, Ingrid

; Koschnitzke, Cristiana

; Krauss, Nathália P.

; Kriebel, Ricardo

; Kuntz, Juliana

; Larocca, João

; Leal, Eduardo S.

; Lewis, Gwilym P.

; Lima, Carla T.

; Lima, Haroldo C.

; Lima, Itamar B.

; Lima, Laíce F.G.

; Lima, Laura C.P.

; Lima, Leticia R.

; Lima, Luís F.P.

; Lima, Rita B.

; Lírio, Elton J.

; Liro, Renata M.

; Lleras, Eduardo

; Lobão, Adriana

; Loeuille, Benoit

; Lohmann, Lúcia G.

; Loiola, Maria I.B.

; Lombardi, Julio A.

; Longhi-Wagner, Hilda M.

; Lopes, Rosana C.

; Lorencini, Tiago S.

; Louzada, Rafael B.

; Lovo, Juliana

; Lozano, Eduardo D.

; Lucas, Eve

; Ludtke, Raquel

; Luz, Christian L.

; Maas, Paul

; Machado, Anderson F.P.

; Macias, Leila

; Maciel, Jefferson R.

; Magenta, Mara A.G.

; Mamede, Maria C.H.

; Manoel, Evelin A.

; Marchioretto, Maria S.

; Marques, Juliana S.

; Marquete, Nilda

; Marquete, Ronaldo

; Martinelli, Gustavo

; Martins da Silva, Regina C.V.

; Martins, Ângela B.

; Martins, Erika R.

; Martins, Márcio L.L.

; Martins, Milena V.

; Martins, Renata C.

; Matias, Ligia Q.

; Maya-L., Carlos A.

; Mayo, Simon

; Mazine, Fiorella

; Medeiros, Debora

; Medeiros, Erika S.

; Medeiros, Herison

; Medeiros, João D.

; Meireles, José E.

; Mello-Silva, Renato

; Melo, Aline

; Melo, André L.

; Melo, Efigênia

; Melo, José I.M.

; Menezes, Cristine G.

; Menini Neto, Luiz

; Mentz, Lilian A.

; Mezzonato, A.C.

; Michelangeli, Fabián A.

; Milward-de-Azevedo, Michaele A.

; Miotto, Silvia T.S.

; Miranda, Vitor F.O.

; Mondin, Cláudio A.

; Monge, Marcelo

; Monteiro, Daniele

; Monteiro, Raquel F.

; Moraes, Marta D.

; Moraes, Pedro L.R.

; Mori, Scott A.

; Mota, Aline C.

; Mota, Nara F.O.

; Moura, Tania M.

; Mulgura, Maria

; Nakajima, Jimi N.

; Nardy, Camila

; Nascimento Júnior, José E.

; Noblick, Larry

; Nunes, Teonildes S.

; O'Leary, Nataly

; Oliveira, Arline S.

; Oliveira, Caetano T.

; Oliveira, Juliana A.

; Oliveira, Luciana S.D.

; Oliveira, Maria L.A.A.

; Oliveira, Regina C.

; Oliveira, Renata S.

; Oliveira, Reyjane P.

; Paixão-Souza, Bruno

; Parra, Lara R.

; Pasini, Eduardo

; Pastore, José F.B.

; Pastore, Mayara

; Paula-Souza, Juliana

; Pederneiras, Leandro C.

; Peixoto, Ariane L.

; Pelissari, Gisela

; Pellegrini, Marco O.O.

; Pennington, Toby

; Perdiz, Ricardo O.

; Pereira, Anna C.M.

; Pereira, Maria S.

; Pereira, Rodrigo A.S.

; Pessoa, Clenia

; Pessoa, Edlley M.

; Pessoa, Maria C.R.

; Pinto, Luiz J.S.

; Pinto, Rafael B.

; Pontes, Tiago A.

; Prance, Ghillean T.

; Proença, Carolyn

; Profice, Sheila R.

; Pscheidt, Allan C.

; Queiroz, George A.

; Queiroz, Rubens T.

; Quinet, Alexandre

; Rainer, Heimo

; Ramos, Eliana

; Rando, Juliana G.

; Rapini, Alessandro

; Reginato, Marcelo

; Reis, Ilka P.

; Reis, Priscila A.

; Ribeiro, André R.O.

; Ribeiro, José E.L.S.

; Riina, Ricarda

; Ritter, Mara R.

; Rivadavia, Fernando

; Rocha, Antônio E.S.

; Rocha, Maria J.R.

; Rodrigues, Izabella M.C.

; Rodrigues, Karina F.

; Rodrigues, Rodrigo S.

; Rodrigues, Vinícius T.

; Rodrigues, William

; Romaniuc Neto, Sérgio

; Romão, Gerson O.

; Romero, Rosana

; Roque, Nádia

; Rosa, Patrícia

; Rossi, Lúcia

; Sá, Cyl F.C.

; Saavedra, Mariana M.

; Saka, Mariana

; Sakuragui, Cássia M.

; Salas, Roberto M.

; Sales, Margareth F.

; Salimena, Fatima R.G.

; Sampaio, Daniela

; Sancho, Gisela

; Sano, Paulo T.

; Santos, Alessandra

; Santos, Élide P.

; Santos, Juliana S.

; Santos, Marianna R.

; Santos-Gonçalves, Ana P.

; Santos-Silva, Fernanda

; São-Mateus, Wallace

; Saraiva, Deisy P.

; Saridakis, Dennis P.

; Sartori, Ângela L.B.

; Scalon, Viviane R.

; Schneider, Ângelo

; Sebastiani, Renata

; Secco, Ricardo S.

; Senna, Luisa

; Senna-Valle, Luci

; Shirasuna, Regina T.

; Silva Filho, Pedro J.S.

; Silva, Anádria S.

; Silva, Christian

; Silva, Genilson A.R.

; Silva, Gisele O.

; Silva, Márcia C.R.

; Silva, Marcos J.

; Silva, Otávio L.M.

; Silva, Rafaela A.P.

; Silva, Saura R.

; Silva, Tania R.S.

; Silva-Gonçalves, Kelly C.

; Silva-Luz, Cíntia L.

; Simão-Bianchini, Rosângela

; Simões, André O.

; Simpson, Beryl

; Siniscalchi, Carolina M.

; Siqueira Filho, José A.

; Siqueira, Carlos E.

; Siqueira, Josafá C.

; Smith, Nathan P.

; Snak, Cristiane

; Soares Neto, Raimundo L.

; Soares, Kelen P.

; Soares, Marcos V.B.

; Soares, Maria L.

; Soares, Polyana N.

; Sobral, Marcos

; Sodré, Rodolfo C.

; Somner, Genise V.

; Sothers, Cynthia A.

; Sousa, Danilo J.L.

; Souza, Elnatan B.

; Souza, Élvia R.

; Souza, Marcelo

; Souza, Maria L.D.R.

; Souza-Buturi, Fátima O.

; Spina, Andréa P.

; Stapf, María N.S.

; Stefano, Marina V.

; Stehmann, João R.

; Steinmann, Victor

; Takeuchi, Cátia

; Taylor, Charlotte M.

; Taylor, Nigel P.

; Teles, Aristônio M.

; Temponi, Lívia G.

; Terra-Araujo, Mário H.

; Thode, Veronica

; Thomas, W.Wayt

; Tissot-Squalli, Mara L.

; Torke, Benjamin M.

; Torres, Roseli B.

; Tozzi, Ana M.G.A.

; Trad, Rafaela J.

; Trevisan, Rafael

; Trovó, Marcelo

; Valls, José F.M.

; Vaz, Angela M.S.F.

; Versieux, Leonardo

; Viana, Pedro L.

; Vianna Filho, Marcelo D.M.

; Vieira, Ana O.S.

; Vieira, Diego D.

; Vignoli-Silva, Márcia

; Vilar, Thaisa

; Vinhos, Franklin

; Wallnöfer, Bruno

; Wanderley, Maria G.L.

; Wasshausen, Dieter

; Watanabe, Maurício T.C.

; Weigend, Maximilian

; Welker, Cassiano A.D.

; Woodgyer, Elizabeth

; Xifreda, Cecilia C.

; Yamamoto, Kikyo

; Zanin, Ana

; Zenni, Rafael D.

; Zickel, Carmem S

Rodriguésia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2015, Volume 66 N. 4 Pages 1085 - 1113

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Resumo Um levantamento atualizado das plantas com sementes e análises relevantes acerca desta biodiversidade são apresentados. Este trabalho se iniciou em 2010 com a publicação do Catálogo de Plantas e Fungos e, desde então vem sendo atualizado por mais de 430 especialistas trabalhando online. O Brasil abriga atualmente 32.086 espécies nativas de Angiospermas e 23 espécies nativas de Gimnospermas e estes novos dados mostram um aumento de 3% da riqueza em relação a 2010. A Amazônia é o Domínio Fitogeográfico com o maior número de espécies de Gimnospermas, enquanto que a Floresta Atlântica possui a maior riqueza de Angiospermas. Houve um crescimento considerável no número de espécies e nas taxas de endemismo para a maioria dos Domínios (Caatinga, Cerrado, Floresta Atlântica, Pampa e Pantanal), com exceção da Amazônia que apresentou uma diminuição de 2,5% de endemicidade. Entretanto, a maior parte das plantas com sementes que ocorrem no Brasil (57,4%) é endêmica deste território. A proporção de formas de vida varia de acordo com os diferentes Domínios: árvores são mais expressivas na Amazônia e Floresta Atlântica do que nos outros biomas, ervas são dominantes no Pampa e as lianas apresentam riqueza expressiva na Amazônia, Floresta Atlântica e Pantanal. Este trabalho não só quantifica a biodiversidade brasileira, mas também indica as lacunas de conhecimento e o desafio a ser enfrentado para a conservação desta flora.

Abstract An updated inventory of Brazilian seed plants is presented and offers important insights into the country's biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, showing an increase of 3% in its species richness in relation to 2010. The Amazon Rainforest is the richest Brazilian biome for Gymnosperms, while the Atlantic Rainforest is the richest one for Angiosperms. There was a considerable increment in the number of species and endemism rates for biomes, except for the Amazon that showed a decrease of 2.5% of recorded endemics. However, well over half of Brazillian seed plant species (57.4%) is endemic to this territory. The proportion of life-forms varies among different biomes: trees are more expressive in the Amazon and Atlantic Rainforest biomes while herbs predominate in the Pampa, and lianas are more expressive in the Amazon, Atlantic Rainforest, and Pantanal. This compilation serves not only to quantify Brazilian biodiversity, but also to highlight areas where there information is lacking and to provide a framework for the challenge faced in conserving Brazil's unique and diverse flora.

https://doi.org/10.1590/2175-7860201566411 33340 downloads

Sediment removal from crude oil emulsion using microwave radiation
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics
- Dimensions
- PlumX
- Altmetric

Antes, Fabiane G.

; Pereira, Juliana S. F.

; Diehl, Liange O.

; Pereira, Letícia S. F.

; Boeck, Paula

; Guimarães, Regina C. L.

; Guarnieri, Ricardo A.

; Ferreira, Bianca M. S.

; Santos, Maria de Fatima P. dos

; Foletto, Edson Luiz

; Flores, Erico M. M.

Journal of the Brazilian Chemical Society

Journal Metrics
- Sobre o periódico
- SciELO Analytics

aug 2013, Volume 24 N. 8 Pages 1287 - 1294

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Radiação micro-ondas em sistema fechado foi utilizada para a remoção de sedimentos de emulsão de petróleo para a posterior caracterização em laboratório. O programa de aquecimento do forno de micro-ondas foi otimizado através da avaliação do tempo de aquecimento (5 a 30 s) e da potência de micro-ondas (300 a 1400 W). O teor de sedimentos foi determinado usando um procedimento de filtração com membrana conforme recomendado pela norma ASTM D 4807-05, antes e após a remoção de sedimentos. Os teores de água e cloreto foram determinados no óleo obtido após a remoção de sedimentos. Até oito amostras de 20 g puderam ser processadas simultaneamente. A eficiência de remoção de sedimentos foi superior a 95%. Foi possível a obtenção de petróleo virtualmente isento de água, sal e sedimentos, permitindo a determinação de parâmetros como gravidade API, densidade, viscosidade e número de acidez total sem interferências causadas por sedimentos ou mesmo sal e água.

Microwave radiation in closed vessels was applied for removal of sediments from crude oil allowing the subsequent crude oil characterization in laboratory. Heating time and microwave power were evaluated in the range of 5 to 30 s and 300 to 1400 W, respectively. Sediment content was determined using the method recommended by ASTM D 4807-05 based on a filtration step in a membrane before and after sediment removal. Water and chloride contents were determined in the oil phase obtained after sediment removal. Up to eight samples of 20 g of crude oil could be simultaneously processed. Sediment removal efficiency was better than 95%. It was possible to obtain crude oil in a suitable condition for determination of routine parameters as API gravity, density, viscosity and total acid number without interferences caused by sediments or even water and salt.

https://doi.org/10.5935/0103-5053.20130163 42005 downloads

Anti-oxidative and anti-ulcerogenic activity of Ipomoea imperati
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Miyahara, Maria Regina M.

; Imamura, Paulo M.

; Freitas, José C. De

; Leonor, Sérgio J.

; Baffa, Oswaldo

; Kinoshita, Angela

; Paula-Zurron, Ana Claudia B. De

Revista Brasileira de Farmacognosia

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2011, Volume 21 N. 6 Pages 978 - 985

Abstract: En | Text: En | PDF: En

Ipomoea imperati (Vahl) Griseb., Convolvulaceae, is used in traditional medicine for the treatment of inflammation, swelling and wounds, as well as to treat pains and stomach problems. This work evaluates the anti-oxidative activity by ESR (Electron Spin Resonance spectroscopy) and the preventive and curative actions of I. imperati in gastric ulcer animal model. Ipomoea imperati (200 mg/kg, p.o.) prevented the formation of gastric lesions in 78% (p<0.05) when compared with the negative control tween 80. Lanzoprazole, prevented in 85% the gastric lesions formation induced by ethanol (p<0.05). Therefore, the oral administration of I. imperati one hour before the ulcerogenic agent prevented the ulcer formation, conserving the citoprotection characteristics of the gastric mucosa and assuring the integrity of gastric glands and gastric fossets. The healing activity of I. imperati (200 mg/kg, p.o.) evaluated in chronic ulcer experiments induced by the acetic acid, was 72% (p<0.05). The positive control, ranitidine, healed 78% of the gastric lesions (p<0.05). The histological analysis confirmed the recovery of the mucosal layer and the muscle mucosal layer harmed by the acetic acid. Experiments in vitro with DPPH (2.2-diphenyl-1-picrylhydrazyl) of anti-oxidative activity demonstrated that I. imperati presents an IC50 of 0.73±0.01 mg/mL.

2162 downloads

10.

Lippia sidoides essential oil encapsulation by angico gum/chitosan nanoparticles
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Paula, Haroldo C. B.

; Sombra, Fernanda M.

; Abreu, Flávia O. M. S

; Paul, Regina C. M. de

Journal of the Brazilian Chemical Society

Journal Metrics
- Sobre o periódico
- SciELO Analytics

dec 2010, Volume 21 N. 12 Pages 2359 - 2366

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Nanoparticulas de quitosana (CH) e goma do angico (AG), dopadas com óleo essencial de Lippia sidoides (Ls) foram preparadas e caracterizadas em relação às suas composições, distribuição de tamanho de partículas, estabilidade térmica, bem como as liberações in vitro e in vivo. Os dados obtidos revelaram que as nanopartículas preparadas usando razões Ls:AG variando de 1:2 a 1:20, apresentaram dopagens na faixa de 3,3 a 7,7%, com eficiência de encapsulação entre 16,0 e 77,8%. Os tamanhos de partículas ficaram na faixa de 10-60 nm, com distribuições independentes do teor de óleo incorporado. FTIR revelou a presença de timol, principal componente de Ls. Análises de TGA e DSC mostraram que a incorporação de óleo na matriz resulta em nanopartículas de menor estabilidade térmica. A amostra Ls: AG = 1:10 apresentou um perfil de liberação in vitro mais lento que as demais, exibindo, porém, nos bioensaios, uma maior mortalidade larval.

Chitosan (CH) and angico gum (AG) nanoparticles were loaded with essential oil, Lippia sidoides (Ls), being characterized according to their composition, size distribution, Ls:polymer ratio, thermal stability and in vitro and in vivo controlled release. Nanoparticles prepared using Ls:AG ratios of 1:2 to 1:20 had loading values of 3.3 to 7.7%, with encapsulation efficiencies in the range of 16.0 to 77.8%. Particle sizes were in the range of 10-60 nm and size distributions were independent of Ls content, for different Ls:AG ratios. Infrared spectroscopy revealed the presence of thymol in the nanoparticles. TGA and DSC revealed that the degradation temperature of AG-CH nanoparticles decreased with an increase in Ls content. Controlled-release data showed a slower release profile for samples with Ls:AG = 1:10 than for the other samples. Bioassays showed that sample Ls:AG = 1:10 has a greater larvicidal effect, with 85 ± 3% mortality.

4965 downloads

11.

Esferas (beads) de alginato como agente encapsulante de óleo de croton zehntneri Pax et Hoffm
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Paula, Haroldo C. B. de

; Oliveira, Erick F. de

; Abreu, Flavia O. M. S.

; Paula, Regina C. M. de

; Morais, Selene M. de

; Forte, Maria M. C.

Polímeros

Journal Metrics
- Sobre o periódico
- SciELO Analytics

jun 2010, Volume 20 N. 2 Pages 112 - 120

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Esferas de alginato (ALG) reticuladas com cálcio e revestidas com goma do cajueiro (GC) foram preparadas e dopadas com óleo essencial de Croton zehntneri Pax et Hoffm (Cz), visando a seu emprego como larvicida para combate ao vetor da dengue. As esferas foram caracterizadas estruturalmente por espectroscopia de infravermelho, análise térmica, microscopia eletrônica de varredura e em relação aos seus parâmetros de transporte líquido, dopagem, embebição (Q) e cinética de liberação in vitro e in vivo. Os resultados revelaram que as esferas possuem morfologia com uma alta regularidade esférica, com superfície porosa. A matriz ALG:Cz =1:1 apresentou maior dopagem e eficiência de encapsulamento e valores de Q entre 10 e 12. O perfil de liberação do óleo encapsulado apresentou-se mais prolongado nas esferas contendo goma do cajueiro, ALG-GC:Cz =1:1. A taxa de mortalidade de larvas de Stegomyia aegypti para teores de 1,81 a 4,25 mg de óleo nas esferas resultou em valores na faixa de 72 a 100%, após 24 h. A matriz polimérica mostrou-se efetiva para proteção do principio ativo até cerca de 70 dias, com perdas da ordem de 35%. A análise térmica revelou que a incorporação de Cz e GC resulta em uma matriz polimérica termicamente mais estável.

Alginate beads (ALG) crosslinked with calcium and coated with cashew gum (GC) were prepared and loaded with an essential oil from Croton zehntneri Pax et Hoffm (Cz). The beads were characterized by FTIR, thermal properties, with respect to their size, shape, larvicide loading, swelling, and in vitro and in vivo release kinetics. Results showed that beads with ALG:Cz =1:1 relative ratio showed higher loading and encapsulation efficiency, although presenting a faster release kinetics. On the other hand, ALG beads coated with GC showed Q values from 10 to 12, representing a significant increase in the hydrophilic character of the matrix. Infrared spectroscopy and thermal analysis confirmed the presence of essential oil encapsulated in beads. Morphologic investigation by SEM revealed a highly spherical and porous surface. The in vitro profile showed that the Cz oil encapsulated had a prolonged release in ALG-GC beads, probably due to the crosslinking. In vivo tests showed that the mortality degree was related to the mass of the beads, where beads having oil content from 1.81 to 4.25 mg caused larvae mortalities from 72 to 100% after 24 h. The control release system was found to be effective up to 70 days. These results showed that ALG-GC beads loaded with Cz are promising candidate for the control of Stegomyia aegypti larvae.

5363 downloads

12.

Viscoelásticos oftálmicos: comparação entre os comerciais e formulações de galactomanana de Dimorphandra gardneriana
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Pires, Natália R.

; Cunha, Pablyana L. R. da

; Paula, Regina C. M. de

; Feitosa, Judith P. A.

; Jamacaru, Francisco V. F.

; Moraes Filho, Manoel O.

Química Nova

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2010, Volume 33 N. 8 Pages 1709 - 1713

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Ophthalmic viscosurgical devices (OVD) are materials injected in intraocular space during cataract removal to reduce trauma in the patient's eye. Three Brazilian commercially available OVDs (Medilon®, Metilcelulose® and Ofthyal®) were evaluated as well as formulations based on Dimorphandra gardneriana galactomannan. Viscosity and viscoelastic parameters, such as viscosity at zero shear, pseudoplasticity index, elastic and viscous moduli, relaxation time, were determined and compared. Characteristics of an effective OVD were proposed. None of the Brazilian devices studied fulfill the rheological requirements. Only the galactomannan at 3% concentration showed potential to be used as effective OVD.

4919 downloads

13.

Essential oil yield and composition of Lamiaceae species growing in southern Brazil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Agostini, Fabiana

; Santos, Ana Cristina Atti dos

; Rossato, Marcelo

; Pansera, Márcia Regina

; Santos, Paula Luciana dos

; Serafini, Luciana Atti

; Molon, Rosângela

; Moyna, Patrick

Brazilian Archives of Biology and Technology

Journal Metrics
- Sobre o periódico
- SciELO Analytics

apr 2009, Volume 52 N. 2 Pages 473 - 478

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Em vista do reconhecimento de espécies da família Lamiaceae como produtoras de óleos essenciais, este trabalho teve como objetivo identificar algumas espécies nativas do Rio Grande do Sul, bem como avaliar seu potencial aromático. Para isso, foram coletadas sete amostras pertencentes à esta família, em diferentes localidades do Estado. O óleo essencial foi obtido por hidrodestilação em aparelho Clevenger pelo período de 1 hora. Os compostos foram identificados por comparação de seus Índices de Retenção de Kovats (R.I), deterninados com referência a uma série homóloga de n-alcanos e por comparação de seus padrões de fragmentação de massa com dados da literatura. C. incisa e M. aquatica, apresentaram os melhores rendimentos de óleo essencial (1.94% v/p e 0.93% v/p respectivamente). M. aquatica também destacou-se por apresentar cerca de 80% de mentona, além de pouco mais de 14% de pulegona. C. microcephala apresentou aproximadamente 53% de mentofurano e C. incisa cerca de 45% de 1,8-cineol e 18% de α-terpineol.

The Lamiaceae family has been described to be rich in essential oil. The aim of the present work was to identify the native species of Rio Grande do Sul with potential use as the aromatic plants. Seven species of the family were collected in the different localities of the state. The essential oils were obtained by 1h hydrodistillation in a Clevenger apparatus. The constituents were identified by comparing their GC Kovats retention indices (RI), determined with reference to a homologous series of n-alkanes and by comparing their mass spectral fragmentation patterns with literature data. Cunila incisa and Mentha aquatica resulted in the higher esssential oil yields (1.94% v/w and 0.93% v/w, respectively. The composition of M. aquatica was 80% methone, with almost 14% pulegone. C. microcephala had 53% menthofuran and C. incisa nearly 45% of 1.8-cineol and 18% α-terpineol.

5959 downloads Cited 2 times in SciELO

14.

Oxidation of cashew tree gum exudate polysaccharide with TEMPO reagent
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
CiteULike
Mendeley
Other networks

Metrics
- SciELO Analytics

Cunha, Pablyana L. R.

; Maciel, Jeanny S.

; Sierakowski, Maria Rita

; Paula, Regina C. M. de

; Feitosa, Judith P. A.

Journal of the Brazilian Chemical Society

Journal Metrics
- Sobre o periódico
- SciELO Analytics

2007, Volume 18 N. 1 Pages 85 - 92

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

A goma do cajueiro, um polissacarídeo exsudado da árvore Anacardium ocidentale, foi oxidada com o reagente TEMPO e o produto (CGOX) foi caracterizado por técnicas espectroscópicas (FT-IR e RMN), análises cromatográficas (HPLC e GPC), viscosidade e análise térmica (TGA). O rendimento do produto da reação foi de 96%. O teor de ácido urônico da goma nativa (7,2%) aumentou para 36% após a reação. O grau de oxidação, tendo como base as unidades de galactose e glucose livres, foi de 68%. Os dados de RMN mostraram que a oxidação ocorreu preferencialmente nos carbonos primários das unidades de galactose. A grande diferença entre o valor esperado de etaCGOX/etaCG e o valor observado indica que a degradação, durante a oxidação, ocorreu em grande extensão. A presença de impurezas orgânicas e inorgânicas no novo polieletrólito foi detectada por TGA. A goma do cajueiro após a modificação com TEMPO apresentou mais baixa estabilidade térmica que a goma nativa, indicada pelos valores de temperatura inicial de decomposição e IPDT.

Cashew gum (CG), an exudate polysaccharide from Anacardium ocidentale trees, was oxidized with TEMPO reagent and the 7product (CGOX) characterized by spectroscopic techniques (FT-IR and NMR), chromatographic analyses (HPLC and GPC), viscosity measurements and thermal analysis (TGA). The yield of the reaction product was 96%. The uronic acid content in starting gum (7.2 m%) was increased to 36 m%. The degree of oxidation based on free galactose and glucose units was 68%. NMR data show that oxidation occurred preferentially at primary carbons of galactose units. High degradation degree after oxidation was estimated by the difference on the expected and observed etaCGOX/etaCG ratio. The presence of organic and inorganic impurities in the new polyelectrolyte was detected by TGA. A less thermally stable cashew gum is formed after the oxidation with TEMPO based on initial decomposition temperature and IPDT.

5771 downloads

Showing

itens per page

Page of 1 Next

Select one or more results

All Alphabetic

Results

Comparative chart Download CSV

Statistics of

Send result

To*

Use ; (semicolon) to insert more emails.

Send to email

This page

Selected records

All references (max. 300)

Your email

Subject

Comments

Export format:

RIS (for EndNote, ProCite, Reference Manager, RefWorks, Citavi, etc.)

BibTeX

Citation

CSV (for Excel, etc)

Export:

This page

Selected itens

All references (max. 2000)

Sem resultados

No documents were found for your search

Glossary and search help

You can enrich your search in a very simple way. Use the search indexes combined with the connectors (AND or OR) and specify more your search.

For example, if you want to search for articles about
cases of dengue in Brasil in 2015, use:
ti:dengue and publication_year:2015 and aff_country:Brasil

See below the complete list of search indexes that can be used:

Index code	Element
ti	article title
au	author
kw	article keywords
subject	subject (title words, abstract and keywords)
ab	abstract
ta	journal short title (e.g. Cad. Saúde Pública)
journal_title	journal full title (e.g. Cadernos de Saúde Pública)
la	publication language code (e.g. pt - Portuguese, es - Spanish)
type	document type
pid	publication identifier
publication_year	publication year of publication
sponsor	sponsor
aff_country	country code of the author's affiliation
aff_institution	author affiliation institution
volume	article volume
issue	article issue
elocation	elocation
doi	DOI number
issn	journal ISSN
in	SciELO colection code (e.g. scl - Brasil, col - Colômbia)
use_license	article usage license code

SciELO - Scientific Electronic Library Online
Rua Dr. Diogo de Faria, 1087 – 9º andar – Vila Clementino 04037-003 São Paulo/SP - Brasil
Email: scielo@scielo.org

All the contents of this site www.scielo.br, except where otherwise noted, is licensed under a Creative Commons Attribution License.
more »