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Sulfonation of （1 →6）-β-D-Glucan （Lasiodiplodan） and Its Antioxidant and Antimicrobial Potential

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Journal of Pharmacy and Pharmacology 2017年第12期5卷 850-863页

作者： Gabrielle C. Calegari Vidiany A. Q. Santos Sirlei D. Teixeira Aneli M. Barbosa-dekker Robert F. H. dekker Mairio A. A. da Cunha departamento de quimica Universidade Tecnol6gica Federal do Paran6 Pato Branco-PR 85503-390 Brasil departamento de quimica CCE Universidade Estadual de Londrina Londrina-PR 85503-390 Brasil programa de pos-graduacao em Engenharia Ambiental Universidade Tecnologica Federal do Parana Londrina-PR 85503-390Brasil

Kinetics and thermodynamic studies of Methyl Orange removal by polyvinylidene fluoride-PEDOT mats

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Journal of Environmental Sciences 2021年第2期33卷 62-73页

作者： Romario J.da Silva Lizeth Carolina Mojica-Sanchez Filipe D.S.Gorza Graciela C.Pedro Bruna G.Maciel Gabriela P.Ratkovski Herica D.daRocha Kamila T.O.do Nascimento Juan CMedina-Llamas Alicia E.Chavez-Guajardo Jose J.Alcaraz-Espinoza Celso P.de Melo Program a de pos-Graduagao em Ciencia de Materials U niversidade Federal de Pernambuco50670-901 RecifePEBrazil departamento de Ffsica Uniuersidade Federal de Pemambiico50670-901 Reci/ePEBrazil Centro de Estudios Cientificosy Tecnologicos No.18 Instituto Politecnico Nacional98160 ZacatecasZacMexico Unidad Academica de Ciencias de la Tierra Uniuersidad Aut6noma de Zacatecas98058 ZacatecasZacMexico departamento de quimica Universidad Autonoma Metropolitana09340Ciudad de MexicoMexico

We report the preparation of poly(3,4-ethylene dioxythiophene)(PEDOT)-modified polyvinylidene fluoride electrospun fibers and their use as a novel adsorbent material for the removal of the anionic dye Methyl Orange(MO)from aqueous *** novel adsorbent material can be used to selectively remove MO on a wide p H range(3.0-10.0),with a maximum capacity of 143.8 mg/g at p H *** used in a recirculating filtration system,the maximum absorption capacity was reached in a shorter time(20 min)than that observed for batch mode experiments(360 min).Based on the analyses of the kinetics and adsorption isotherm data,one can conclude that the predominant mechanism of interaction between the membrane and the dissolved dye molecules is ***,considering the estimated values for the Gibbs energy,and entropy and enthalpy changes,it was established that the adsorption process is spontaneous and occurs in an endothermic *** good mechanical and environmental stability of these membranes allowed their use in at least 20 consecutive adsorption/desorption cycles,without significant loss of their *** suggest that the physical-chemical characteristics of PEDOT make these hybrid mats a promising adsorbent material for use in water remediation protocols and effluent treatment systems.

关键词： Electrospinning Composite mats Pedot Pvdf mats Dye removal Water remediation

Functionalization of AuMSS nanorods towards more effective cancer therapies

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Nano Research 2019年第4期12卷 719-732页

作者： Carolina F. Rodrigues Telma A. Jacinto Andre F. Moreira Elisabete C. Costa Sonia P. Miguel Ilidio J. Correia CICS-UBI -Centro de Investigagao em Ciencias da Saude Universidade da Beira Interior Covilhd 6200-506 Portugal CIEPQF - departamento de Engenharia quimica Universidade de Coimbra Rua 13 Silvio Lima Coimbra 3030-790 Portugal

The applicatio n of nano particles as selective drug delivery platforms arises as one the most promising therapeutic strategies in the biomedical field. Such systems can encapsulate drugs, prevent its premature degradation, transport and promote the drugs specific delivery to the target site. Among the different nanostructures, gold-core mesoporous silica shell (AuMSS) nanorods have been one of the most explored due to their unique physical and chemical properties. The mesoporous silica biocompatibility, high surface area that can be easily functionalized, tubular pores that can store the drugs, conjugated with the intrinsic capacity of gold nanorod to absorb near-infrared radiation, allows the combination of hyperthermia (i.e., photothermal effect) with drug delivery, making them a nanoplatforms with a huge potential for cancer therapy. Nevertheless, the successful applicati on of AuMSS nanoparticles as an effective can cer nano medicine is hindered by the uncon trolled release of the therapeutic payloads, limited blood circulation time and unfavorable pharmacokinetics. In this review, an overview of the modificati ons performed to improve the AuMSS nano rods applicati on in nanom edicine is provided, highlighting the practical approaches that enhaneed the AuMSS nanorods targeting, responsiveness to different stimuli, and blood circulation time. Further, the basics of AuMSS nano rods syn thesis procedures, gen eral properties, and its applicati on in can cer therapy are also described.

关键词： gold nano rods silica surface modifications targeting cancer

Phenolic profile and biological potential of Endopleura uchi extracts

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Asian Pacific Journal of Tropical Medicine 2015年第11期8卷 870-878页

作者： Luis R.Silva Rafaela Teixeira CICS-UBI-Centro de Investigacao em Ciencias da Saude.Universidale da Beira Interior Av.Infante D.Henrique.6201-506.Corilha.Portugal Instituto Politecnico de Castelo Branco Escola Superior de Saude Dr Lopes DiasArenido do EmpresarioCampus da Talagueira6000-767Castelo BrancaPortugal LEPABE Departamento de Engenharia QuimicaFaculdade de Engenharia.Universidade do PortoRua Dr.Roberto Friass/n4200-465 PortoPortugal REQUIMTE/Laboratorio de Farmacognosia Departamento de QuimicaFaculdade de FarmaciaUniversidade do Porto.Rua de Jorge Viterbo Ferreira228.4050-313 PortoPortugal

Objective:To improve the knowledge on the metabolite composition of Endopleura uchi bark,concerning phenolic compounds,and to evaluate some of its biological capacities for further possible exploitation in food and pharmaceutical industries associated to their healthpromoting ***:Two different extracts(infusion and hydroethanolic) were studied concerning phenolic composition and biological ***:Five compounds were determined by HPLC-DAD,being bergenin the major *** general way,infusion presents a greater richness in these *** antioxidant,***,α-glucosidase and antibacterial activity were checked by in vitro assays.A dose-dependent response was noticed against DPPH,superoxide and nitric oxide radicals,acetylcholinesterase,butyrylcholinesterase and against α-glucosidase inhibitory *** capacity of both extracts was investigated against Gram-positive and Gramnegative bacteria,being more effective against the first *** concentrations of infusion extract tested here revealed that is non-toxic for intestinal(Caco-2) cells ***:The results suggest that the extracts of Endopleura uchi may be interesting for incorporating in pharmaceutical preparations for human health,since it can suppress hyperglycaemia and inhibit cholinesteases,and or as food additive due to its antiradical and antibacterial activities.

关键词： Endopleura uchi Bark Phenolic compounds Anti-diabe

Use of Ultrasound Bath in the Extraction and Quantification of Ester-Linked Phenolic Acids in Tropical Forages

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American Journal of Analytical Chemistry 2011年第3期2卷 344-351页

作者： Mellina Damasceno Rachid Santos Aline de Paula Vitor Jailton da Costa Carneiro Domingos Savio Campos Paciullo Renato Camargo Matos Maria Auxiliadora Costa Matos NUPIS(Nucleo de Pesquisa em Instrumentacao e Separacao Analiticas) Departamento de QuimicaInstituto de Ciencias ExatasUniversidade Federal de Juiz de ForaJuiz de ForaBrazil emBRAPA—Centro Nacional de Pesquisa de Gado de Leite(CNPGL) Juiz de ForaBrazil

A method was developed for the analysis of ester-linked phenolic acids in forage samples using extraction by an ultrasound-assisted treatment and quantification by HPLC with a UV-VIS detector. A reversed-phase C18 column was used for developing the method and the optimal condition was established with isocratic elution using acetonitrile/methanol/H3PO4 pH 2.08 (13:12.5:74.5) as the mobile phase. To reduce the time of sample processing, the extraction of ester-linked phenolic acids was studied using ultrasound bath and the results were then compared with those from an extraction usual using alkaline hydrolysis (20°C for 24 h). The method was valued through external and internal calibration. Internal calibration using o-coumaric acid as internal standard and m-coumaric acid as surrogate internal standard showed better results. The detection limits were of 0.09 and 0.04 mg●L-1 for p-coumaric and ferulic acids, respectively. The proposed method showed a good linear dynamic range (3.00 - 30.00 mg●L-1) for the analytes. The usefulness of the methodology was demonstrated by addition-recovery experiments using forage samples and values were in the 83 to 99% range. The extraction of ester-linked phenolic acids by 120 minutes of ultrasound bath was faster and more reproducible than alkaline hydrolysis (20°C for 24 h).

关键词： Ultrasound Bath Phenolic Acids Forage Internal Calibration

Pyrolysis of Agroindustrial Residues of Coffee, Sugarcane Straw and Coconut-Fibers in a Semi-pilot Plant for Production of Bio-oils： Gas Chromatographic Characterization

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Journal of Earth Science and Engineering 2016年第5期6卷 235-244页

作者： Mozart D. Bispo Jamilly Andressa Santos Barros debora Tomasini Carmem Primaz Elina B. Caramao Claudio Dariva Laiza C. Krause Nucleo de Estudos em Sistemas Coloidais Instituto de Tecnologia e Pesquisa PBI/PEP/UNIT Aracaju-SE 49032-490 Brasil Instituto de quimica INCT Energia e Ambiente UFRGS-Porto Alegre RS--Brasil

O-Acetylated （1→6）-13-D-Glucan （Lasiodiplodan）： Chemical derivatization, Characterization and Antioxidant Activity

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Journal of Pharmacy and Pharmacology 2018年第4期6卷 320-332页

作者： William N. Sanchez Luna Vidiany A. Q. Santos Sirlei D. Teixeira Aneli M. Barbosa-dekker Robert F. H.dekker Mario A. A. da Cunha departamento de quimica Universidade Tecnologica Federal do Parana Pato Branco-PR 85503-390 Brasil departamento de quimica CCE Universidade Estadual de Londrina Londrina-PR 86051-990 Brazil programa de P6s-graduacao em Engenharia Ambiental Universidade Tecnologica Federal do Paran6 Londrina-PR 86036-370Brazil