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Ecotoxicological Effects of Biochar Obtained from Spent Coffee Grounds
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Souza, Lorrana Zélia Martins de

; Pinto, Bruna Cristina

; Alves, Adriana Barboza

; Ribeiro, Amanda Vanessa de Oliveira

; Feliciano, Débora Cristina Teodoro

; Silva, Luisa Heringer da

; Dias, Thiago Tales Moraes

; Yılmaz, Murat

; Oliveira, Magno André de

; Bezerra, Augusto Cesar da Silva

; Ferreira, Osania Emerenciano

; Lima, Robson Pereira de

; Pimenta, Lúcia Pinheiro do Santos

; Machado, Alan Rodrigues Teixeira

Materials Research

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2022, Volume 25 Supl. 2 elocation e20220013

Resumo: En | Texto: En | PDF: En

Abstract The objective of this work is to investigate the conversion of spent coffee grounds (SCG) into biochar (BSC) and the ecotoxicological effects of the product obtained. The SCG and BSC were characterized by characterized by different techniques (TGA/DTG, FTIR, XRD, SEM, EDS, and EDXRF). Proton Nuclear Magnetic Resonance (1H NMR) was used to characterize the aqueous extract of BSC. The inhibitory effect on lettuce (Lactuca sativa) germination was investigated. Besides, antimicrobial activity evaluation trials were conducted with Azospirillum brasilense and Trichoderma spp. The results showed that in the BSC production process, the extractives and lignocellulosic components in the SCG were partly decomposed. Tests conducted with microorganisms did not reveal any toxic effect of BSC. However, high phytotoxicity against lettuce was recorded for rate 100 t/ha of BSC. This effect was associated with the presence of carboxylic acids identified by 1H NMR in the BSC extract aqueous.

https://doi.org/10.1590/1980-5373-mr-2022-0013

NMR-Based Metabolomic Screening for Metabolites Associated with Resistance to Meloidogyne javanica in Annona muricata Roots
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Machado, Alan R. T.

; Medeiros, Felipe S.

; Souza Filho, José D. de

; Sena, Marcelo M.

; Terra, Willian C.

; Pimenta, Lúcia P. S.

Journal of the Brazilian Chemical Society

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Jun 2019, Volume 30 Nº 6 Páginas 1276 - 1283

Resumo: En | Texto: En | PDF: En

The resistance of Annona muricata roots to the nematode Meloidogyne javanica was investigated by nuclear magnetic resonance (NMR)-based metabolomics in combination with principal component analysis (PCA). Metabolic changes in roots exposed and not exposed to the nematode were evaluated and compared. In addition, the presence of nematicidal compounds in the root extracts was investigated through in vitro assay against Meloidogyne javanica second-stage juveniles. Plants exposed to nematodes showed significant changes in their metabolism after 24 h. Several resistance-related metabolites, including dopamine, xanthine and aromatic compounds, could be identified in the roots with the joint analysis of 1D/2D NMR and the loadings of PC3 (17.8%). A.muricata root chloroform extract, containing mainly acetogenins, has shown nematostatic activity against M. javanica, suggesting that a pre-formed defense mechanism can support the reported resistance. For the first time, metabolomic studies allowed to identify induced and pre-formed defense mechanisms and their related metabolites in Annona muricata.

https://doi.org/10.21577/0103-5053.20190022 881 downloads

Zika Virus Activity of the Leaf and Branch Extracts of Tontelea micrantha and Its Hexane Extracts Phytochemical Study
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Ferreira, Fernanda L.

; Hauck, Marcela S.

; Duarte, Lucienir P.

; Magalhães, José C. de

; Silva, Louise S. M. da

; Pimenta, Lúcia P. S.

; Lopes, Julio C. D.

; Mercadante-Simões, Maria O.

; Vieira Filho, Sidney A.

Journal of the Brazilian Chemical Society

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Abr 2019, Volume 30 Nº 4 Páginas 793 - 803

Resumo: En | Texto: En | PDF: En

The new triterpene friedelan-1,3,21-trione, the known compounds friedelan-3-one, 3β-friedelinol, 3,4-seco-friedelan-3-oic acid, 28-hydroxyfriedelan-3-one, friedelan-3-oxo-28-al, friedelan-3,21-dione, 30-hydroxyfriedelan-3-one, a mixture of 30-hydroxyfriedelan-3-one/21α-hydroxyfriedelan-3-one, 21β-hydroxyfriedelan-3-one, gutta-percha, squalene, and a mixture of palmitic/stearic/oleic acids were isolated from the hexane extracts of leaves and branches of T. micrantha. Their chemical structures were established by Fourier transform infrared spectroscopy (FTIR), gas chromatography (GC), 1D/2D nuclear magnetic resonance (NMR) and comparison with the literature data. All compounds were described for T. micrantha and the genus Tontelea for the first time. The branch and leaf extracts displayed anti-Zika virus activity at the lowest tested concentration of 15.6 µg mL-1, mainly virucidal effect, and presented no cytotoxicity to Vero cells. Furthermore, the ethyl acetate and methanolic leaf extracts demonstrated the best activities at the concentration of 31.2 and 15.6 µg mL-1 at the viral adsorption and penetration stages, respectively. These results showed that these extracts may be promising candidates for the Zika virus treatment.

https://doi.org/10.21577/0103-5053.20180210 729 downloads

In vitro cytotoxic, antifungal, trypanocidal and leishmanicidal activities of acetogenins isolated from Annona cornifolia A. St. -Hil. (Annonaceae)
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LIMA, LUCIANA A.R.S.

; ALVES, TÂNIA M.A.

; ZANI, CARLOS L.

; SALES JÚNIOR, POLICARPO A.

; ROMANHA, ALVARO J.

; JOHANN, SUSANA

; CISALPINO, PATRÍCIA S.

; PIMENTA, LÚCIA P.S.

; BOAVENTURA, MARIA AMÉLIA D.

Anais da Academia Brasileira de Ciências

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Jun 2014, Volume 86 Nº 2 Páginas 829 - 839

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Annona cornifolia A. St. -Hil. é uma pequena árvore anual perene encontrada no cerrado brasileiro; seu fruto verde é usado popularmente no tratamento de úlceras. As acetogeninas isoladas a partir das sementes de Annona cornifolia anteriormente apresentaram atividade antioxidante. Continuando as nossas investigações sobre as atividades biológicas das acetogeninas, quatro misturas binárias e dez acetogeninas bis-tetra-hidrofurânicas adjacentes puras foram avaliadas quanto às atividades: citotóxica (sobre três linhagens de células tumorais humanas), antifúngica (sobre Paracoccidioides brasiliensis), tripanocida (sobre Trypanosoma cruzi) e leishmanicida (sobre Leishmania amazonensis). As acetogeninas apresentaram atividade citotóxica, confirmando seu uso potencial na terapia anticâncer. Quanto às atividades leishmanicida e tripanocida, foi observada uma inibição de 87% das formas amastigotas de L. amazonensis e 100% de formas amastigotas e tripomastigotas de T. cruzi, quando testadas a uma concentração de 20 µg mL–1. Além disso, seis acetogeninas mostraram maior atividade sobre todas as três cepas testadas de P. brasiliensis que o trimetoprim-sulfametoxazol, um medicamento usado no tratamento da paracoccidioidomicose. Assim, as acetogeninas podem ser uma alternativa no tratamento de uma série de doenças que têm um enorme impacto em milhões de pessoas no mundo. Este trabalho relata pela primeira as atividades antifúngica, leishmanicida e tripanocida para estas acetogeninas.

Annona cornifolia A. St. -Hil. is a small annual perennial tree found in the Brazilian savannah; their green fruit is popularly used in the treatment of ulcers. The acetogenins isolated from the seeds of Annona cornifolia previously showed to possess antioxidant activity. In continuation of our investigations on the biological activities of acetogenins, four binary mixtures and ten pure adjacent bis-tetrahydrofuran annonaceous acetogenins were evaluated: the cytotoxic (against three human tumor cell lines), antifungal (against Paracoccidioides brasiliensis), trypanocidal (against Trypanosoma cruzi) and leishmanicidal (against Leishmania amazonensis) activities. Acetogenins presented cytotoxic activity confirming their potential use in anti-cancer therapy. Regarding leishmanicidal and trypanocidal activities, an inhibition of 87% of L. amazonensis amastigotes and 100% of T. cruzi amastigotes and trypomastigotes was observed, when tested at the concentration of 20 µg mL–1. Moreover, six acetogenins showed more activity against all the three tested isolates of P. brasiliensis than trimethoprim-sulfamethoxazole, a drug used for treating paracoccidioidomycosis. Thus, acetogenins may be an alternative in treating a number of diseases that have a huge impact on millions of people worldwide. This paper reports for the first time the antifungal, leishmanicidal and trypanocidal activities for these acetogenins.

https://doi.org/10.1590/0001-3765201420130048 2737 downloads

Evaluation of antimicrobial activity and toxic potential of extracts and triterpenes isolated from Maytenus imbricata
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Rodrigues, Vanessa G.

; Duarte, Lucienir P.

; Silva, Grácia D. F.

; Silva, Fernando C.

; Góes, Jefferson V.

; Takahashi, Jacqueline A.

; Pimenta, Lúcia P. S.

; Vieira Filho, Sidney A.

Química Nova

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2012, Volume 35 Nº 7 Páginas 1375 - 1380

Resumo: En | Texto: En | PDF: En

The phytochemical study of hexane/ethyl ether (1:1) extract of the roots of M. imbricata, Celastraceae, resulted in the isolation and characterization of six known triterpenes: 11α-hydroxylup-20(29)-en-3-one, previously isolated from this species besides, 3β,11α-di-hydroxylup-20(29)-ene, 3,7-dioxofriedelane, 3-oxo-29-hydroxyfriedelane, tingenone and 6-oxo-tingenol. The chemical structures of these triterpenes were established by spectrometric data (IR, ¹H and 13C NMR) and through comparison with literature data. The hexane/ethyl ether (1:1), ethyl acetate and methanol extracts, and 11α-hydroxylup-20(29)-en-3-one, tingenone and 6-oxo-tingenol, showed antimicrobial properties on in vitro assays. All extracts and triterpenes, except 3β,11α-di-hydroxylup-20(29)-ene, presented toxicity demonstrated by the larvicidal effect test using Artemia salina.

2794 downloads

In vitro antifungal activity of fatty acid methyl esters of the seeds of Annona cornifolia A.St.-Hil. (Annonaceae) against pathogenic fungus Paracoccidioides brasiliensis
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Lima, Luciana Alves Rodrigues dos Santos

; Johann, Susana

; Cisalpino, Patrícia Silva

; Pimenta, Lúcia Pinheiro Santos

; Boaventura, Maria Amélia Diamantino

Revista da Sociedade Brasileira de Medicina Tropical

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Dez 2011, Volume 44 Nº 6 Páginas 777 - 780

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

INTRODUÇÃO: Os ácidos graxos são abundantes em óleos vegetais. Eles são conhecidos por suas propriedades antibacterianas e antifúngicas. MÉTODOS: A suscetibilidade a antifúngicos foi avaliada pelo ensaio de microdiluição em caldo de acordo com CLSI (anteriormente NCCLS) sobre 16 isolados de interesse clínico. RESULTADOS: Nesse trabalho, os ésteres metílicos de ácidos graxos (FAME) inibiram doze isolados clínicos do fungo patogênico Paracoccidioides brasiliensis, e também foi muito ativo no ensaio de bioautografia sobre o fungo Cladosporium sphaerospermum. CONCLUSÕES: FAME foi um antifúngico mais potente do que sulfametoxazol-trimetoprim contra P. brasiliensis, nas condições utilizadas no presente trabalho.

INTRODUCTION: Fatty acids are abundant in vegetable oils. They are known to have antibacterial and antifungal properties. METHODS: Antifungal susceptibility was evaluated by broth microdilution assay following CLSI (formerly the NCCLS) guidelines against 16 fungal strains of clinical interest. RESULTS: In this work, fatty acid methyl esters (FAME) was able to inhibit 12 clinical strains of the pathogenic fungus Paracoccidioides brasiliensis and were also active in the bioautographic assay against Cladosporium sphaerospermum. CONCLUSIONS: FAME was a more potent antifungal than trimethoprim-sulfamethoxazole against P. brasiliensis under the experimental conditions tested.

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Acetogeninas de anonáceas isoladas de folhas de Rollinia laurifolia
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Nascimento, Francisco das Chagas do

; Boaventura, Maria Amélia Diamantino

; Assunção, Angela Cristina S.

; Pimenta, Lúcia Pinheiro Santos

Química Nova

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Mai 2003, Volume 26 Nº 3 Páginas 319 - 322

Resumo: Pt En | Texto: Pt En | PDF: Pt | PDF: En

Phytochemical investigation of hexanic extract of leaves of Rollinia laurifolia afforded three known acetogenins, uvariamicin-I (1), solamin(2) and gonionenin(3), for the first time isolated from Rollinia genus. The structures of 1, 2 and 3 were elucidated by spectroscopic methods.

4862 downloads

I Diretriz de Dor Torácica na Sala de Emergência
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Bassan, Roberto

; Pimenta, Lúcia

; Leães, Paulo Ernesto

; Timerman, Ari

; Volschan, André

; Polanczyk, Carisi

; Clare, Cristina

; Silva Júnior, Delcio Gonçalves da

; Mesquita, Evandro Tinoco

; Abreu, Flávio Berriel

; Monteiro Júnior, Francisco das Chagas

; Greque, Gilmar Valdir

; Almeida, Gustavo Luis Gouvea de

; Correa Filho, Harry

; Lima, Luis Eduardo de Magalhães

; Oliveira, Maria das Graças Sousa de

; França Neto, Olímpio Ribeiro

; Gamarski, Roberto

; Silva, Sergio Gouveia de Araújo

; Campodonico Filho, Sidney

; Barbosa Filho, Waldomiro

Arquivos Brasileiros de Cardiologia

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Ago 2002, Volume 79 Supl. 2 Páginas 1 - 22

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165198 downloads Citado 4 vezes em SciELO

Is female sex an independent predictor of in-hospital mortality in acute myocardial infarction?
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Pimenta, Lúcia

; Bassan, Roberto

; Potsch, Alfredo

; Soares, José Francisco

; Albanesi Filho, Francisco Manes

Arquivos Brasileiros de Cardiologia

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Jul 2001, Volume 77 Nº 1 Páginas 44 - 50

Resumo: En | Texto: En | PDF: En

OBJECTIVE: To assess whether female sex is a factor independently related to in-hospital mortality in acute myocardial infarction. METHODS: Of 600 consecutive patients (435 males and 165 females) with acute myocardial infarction, we studied 13 demographic and clinical variables obtained at the time of hospital admission through uni- and multivariate analysis, and analyzed their relation to in-hospital death. RESULTS: Females were older (p<0.001) and had a higher incidence of hypertension (p<0.001). Males were more frequently smokers (p<0.001). The remaining risk factors had a similar incidence among both sexes. All variables underwent uni- and multivariate analysis. Through univariate analysis, the following variables were found to be associated with in-hospital death: female sex (p<0.001), age >70 years (p<0.001), the presence of previous coronary artery disease (p=0.0004), previous myocardial infarction (p<0.001), infarction in the anterior wall (p=0.007), presence of left ventricular dysfunction (p<0.001), and the absence of thrombolytic therapy (p=0.04). Through the multivariate analysis of logistic regression, the following variables were associated with in-hospital mortality: female sex (p=0.001), age (p=0.008), the presence of previous myocardial infarction (p=0.02), and left ventricular dysfunction (p<0.001). CONCLUSION: After adjusting for all risk variables, female sex proved to be a variable independently related to in-hospital mortality in acute myocardial infarction.

2345 downloads

10.

Efficacy of a diagnostic strategy for patients with chest pain and no ST-segment elevation in the emergency room
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Bassan, Roberto

; Gamarski, Roberto

; Pimenta, Lúcia

; Volschan, André

; Scofano, Marcelo

; Dohmann, Hans Fernando

; Araujo, Monica

; Clare, Cristina

; Fabrício, Marcelo

; Sanmartin, Carlos Henrique

; Mohallem, Kalil

; Macaciel, Renato

; Gaspar, Sergio

Arquivos Brasileiros de Cardiologia

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Mai 2000, Volume 74 Nº 5 Páginas 412 - 417

Resumo: En | Texto: En | PDF: En

PURPOSE: To evaluate the efficacy of a systematic model of care for patients with chest pain and no ST segment elevation in the emergency room. METHODS: From 1003 patients submitted to an algorithm diagnostic investigation by probability of acute ischemic syndrome. We analyzed 600 ones with no elevation of ST segment, then enrolled to diagnostic routes of median (route 2) and low probability (route 3) to ischemic syndrome. RESULTS: In route 2 we found 17% acute myocardial infarction and 43% unstable angina, whereas in route 3 the rates were 2% and 7%, respectively. Patients with normal/non--specific ECG had 6% probability of AMI whereas in those with negative first CKMB it was 7%; the association of the 2 data only reduced it to 4%. In patients in route 2 the diagnosis of AMI could only be ruled out with serial CKMB measurement up to 9 hours, while in route 3 it could be done in up to 3 hours. Thus, sensitivity and negative predictive value of admission CKMB for AMI were 52% and 93%, respectively. About one-half of patients with unstable angina did not disclose objective ischemic changes on admission. CONCLUSION: The use of a systematic model of care in patients with chest pain offers the opportunity of hindering inappropriate release of patients with ACI and reduces unnecessary admissions. However some patients even with normal ECG should not be released based on a negative first CKMB. Serial measurement of CKMB up to 9 hours is necessary in patients with medium probability of AMI.

2168 downloads Citado 2 vezes em SciELO

11.

Chest pain in the emergency room. Importance of a systematic approach
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Bassan, Roberto

; Scofano, Marcelo

; Gamarski, Roberto

; Dohmann, Hans Fernando

; Pimenta, Lúcia

; Volschan, André

; Araujo, Mônica

; Clare, Cristina

; Fabrício, Marcelo

; Sanmartin, Carlos Henrique

; Mohallem, Kalil

; Gaspar, Sergio

; Macaciel, Renato

Arquivos Brasileiros de Cardiologia

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Jan 2000, Volume 74 Nº 1 Páginas 22 - 29

Resumo: En | Texto: En | PDF: En

OBJECTIVE: To evaluate the efficiency of a systematic diagnostic approach in patients with chest pain in the emergency room in relation to the diagnosis of acute coronary syndrome (ACS) and the rate of hospitalization in high-cost units. METHODS: One thousand and three consecutive patients with chest pain were screened according to a pre-established process of diagnostic investigation based on the pre-test probability of ACS determinate by chest pain type and ECG changes. RESULTS: Of the 1003 patients, 224 were immediately discharged home because of no suspicion of ACS (route 5) and 119 were immediately transferred to the coronary care united because of ST elevation or left bundle-branch block (LBBB) (route 1) (74% of these had a final diagnosis of acute myocardial infarction [AMI]). Of the 660 patients that remained in the emergency room under observation, 77 (12%) had AMI without ST segment elevation and 202 (31%) had unstable angina (UA). In route 2 (high probability of ACS) 17% of patients had AMI and 43% had UA, whereas in route 3 (low probability) 2% had AMI and 7 % had UA. The admission ECG has been confirmed as a poor sensitivity test for the diagnosis of AMI ( 49%), with a positive predictive value considered only satisfactory (79%). CONCLUSION: A systematic diagnostic strategy, as used in this study, is essential in managing patients with chest pain in the emergency room in order to obtain high diagnostic accuracy, lower cost, and optimization of the use of coronary care unit beds.

6019 downloads Citado 2 vezes em SciELO

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