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Chemical and microbiological characterization of tinctures and microcapsules loaded with Brazilian red propolis extract

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j.urnal of Pharmaceutical Analysis 2017年第5期7卷 280-287页

作者： Erika Tayse da Cruz Almeida Maria Cristina Delgado da Silva j.sé Marcos dos santos Oliveira Regianne Umeko Kamiya Rodolfo Elleson dos santos Arruda danilo Abreu Vieira Valdemir da costa Silva Pierre Barnabé Escodro Irinaldo Diniz Basílio-j.nior Ticiano Gomes do Nascimento Laboratório de Controle de Qualidade e Análise de Fármacos Medicamentos e AlimentosCurso de FarmáciaEscola de Enfermagem e FarmáciaUniversidade Federal de AlagoasCampus A.C.SimõesBR 104 Norte-Km 97MaceióAL.CEP:57072-970Brazil Laboratório de Controle de Qualidade Microbiológico de Alimentos Faculdade de NutriçãoUniversidade Federal de AlagoasCampus A.C.SimõesBR 104 Norte/Km 97MaceióAL.CEP:57072-970Brazil

The aim of this study was to characterize tinctures and microcapsules loaded with an ethanol extract of red propolis through chemical, physicochemical and microbiological assays in order to establish quality control tools for nutraceutical preparations of red propolis. The markers(isoflavonoids, chalcones, pterocarpans,flavones, phenolic acids, terpenes and guttiferones) present in the tinctures A and B were identified and confirmed using LC/ESI/FTMS/Orbitrap. Four compositions(A, B, C and D) were prepared to contain B tincture of the red propolis with some pharmaceutical excipients and submitted to two drying processes, i. ***-drying and freeze-drying to obtain microcapsules loaded with the red propolis extract. The tinctures and microcapsules of the red propolis were submitted to the total flavonoid content and antioxidant activity *** antibacterial activity and minimum inhibitory concentration(MIC) were tested using Staphylococcus aureus ATCC 25293 and Pseudomonas aeruginosa ATCC 27853 strains. The tinctures and microcapsules presented high flavonoid quantities from 20.50 to 40.79 mg/100 mg of the microcapsules. The antioxidant activity and IC50 were determined for the tinctures A and B(IC50: 6.95 μg/m L and 7.48 μg/m L), the spray-dried microcapsules(IC50: 8.89–15.63 μg/m L) and the freeze-dried microcapsules(IC50: 11.83–23.36 μg/m L). The tinctures and microcapsules were proved to be bioactive against gram-positive and gram-negative bacteria with inhibition halos superior to 10 mm at concentration of 200 μg/m L and MIC values of 135.87–271.74 μg/m L using gram-positive strain and 271.74–543.48 μg/m L using gram-negative strain. The tinctures and microcapsules of the red propolis have a potential application for nutraceutical products.

关键词： Red propolis Tinctures Microcapsules Isoflavonoids LC/ESI/FTMS/Orbitrap Antioxidant activity Antibacterial activity

Recovery of rare-earth metals from aqueous solutions by bio/adsorption using non-conventional materials:a review with recent studies and promising approaches in column applications

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j.urnal of Rare Earths 2020年第4期38卷 339-355页

作者： Talles Barcelos da costa Meuris Gurgel Carlos da Silva Melissa Gurgel Adeodato Vieira University of Campinas School of Chemical EngineeringAlbert Einstein Avenue50013083e852 CampinasBrazil

The recovery of rare-earth metals(REMs)is of great economic and environmental interest,because of their high market prices and various industrial ***,with the increasing demand for high-purity rare-earth compounds,the separation and purification of these elements have gained considerable *** bio/adsorption process has been considered an alternative to recover these elements,by its simplicity,low cost and efficiency for recovery of REMs at low *** review article presents the recent progress regarding REM bio/adsorption published literature in batch system by different non-conventional bio/adsorbents,as well as a critical analysis of the technological challenges to be faced and future *** this purpose,the best application model(isotherm,kinetics),thermodynamic quantities and selection of eluents for desorption studies are also ***,in this review,the application of different bio/adsorbent materials were reviewed extensively in terms of the removal and recovery of REMs in continuous fixed-bed adsorption and regeneration ***,future aspects in bio/adsorption research and prospects for commercial applications were discussed.

关键词： Rare-earth metals Bio/adsorbents Adsorption kinetics Isotherm Batch desorption Continuous fixed-bed adsorption

Raman Spectra of Nd:La3Ga5SiO14 and Nd:La3Ga5.5Ta0.5O14 Crystals

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Chinese j.urnal of Structural Chemistry 2016年第11期35卷 1673-1678页

作者：张娜娜王继扬潘晓茹宋明君 Clenilton costa dos santos Ilde Guedes da Guedesa College of Chemistry & Chemical and Environmental Engineering Weifang University State Key Laboratory of Crystal Materials Shandong University Departamento de Física CCETUniversidade Federal do Maranh?o Departamento de Física Universidade Federal do CearáCampus do Pici

Single crystals of Nd：La3Ga5SiO14 （NLGS） and Nd：La3Ga5.5Ta0.5O14 （NLGT） were grown by Czochralski method. Both crystals exhibit a langasite structure （space group D32 （P321） with Z = 1）, whose general formula is A3BC2D3O14, where A, B, C and D represent the dodecahedral, octahedral and tetrahedral positions, respectively. The adding of low content of Nd does not change the crystal structure. Although they are isostructural, the distribution of atoms among the symmetric sites is different. While NLGT exhibits a perfect orderly structure, NLGS exhibits an intrinsically disordered structure due to the random distribution of Ga and Si atoms at the C3（2） symmetry sites. To understand what changes occur in the phonon distribution when Ta replaces Si, we recorded and analyzed room temperature polarized Raman spectra. We observe 8A1＋18E modes for NLGS and 10A1＋13E for NLGT crystals. When Si is substituted by Ta, we observe that the wavenumber of some modes related to vibrations involving Ga and O atoms decreases. This agrees with the fact that the Ga–O bonds are shorter in NLGS than in NLGT.

关键词： Czochralski method langasite structure Raman scattering piezoelectric

Broadband Optical Active Waveguides Written by Femtosecond Laser Pulses in Lithium Fluoride

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Chinese Physics Letters 2014年第1期31卷 72-75页

作者： Ismael Chiamenti Francesca Bonfigli Anderson S. L. Gomes Rosa Maria Montereali Larissa N. da costa Hypolito j. Kalinowski Federal University of Technology- Parang 80230-901 Curitiba Brazil ENEA C. R. Frascati Photonics Micro and Nanostructures Laboratory UTAPRAD-MNF V. E. Fermi 45 00044 Frascati (Rome) Italy Department of Physics Universidade Federai de Pernambuco necife Brazil

Broadband waveguiding through light-emitting strips directly written in a blank lithium fluoride crystal with a femtosecond laser is reported. Light guiding was observed at several optical wavelengths, from blue, 458 nm, to near-infrared, at 155nm. Visible photoluminescence spectra of the optically active F2 and F33 color centers produced by the fs laser writing process were measured. The wavelength-dependent refractive index increase was estimated to be in the order of 10-3-10-4 in the visible and near-infrared spectral intervals, which is consistent with the stable formation of point defects in LiF.

关键词： POINT defects CRYSTAL defects IMPURITY centers ANTISITE defects INTERSTITIALS FLUX pinning

Mechanical properties of a clay soil reinforced with rice husk under drained and undrained conditions

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j.urnal of Rock Mechanics and Geotechnical Engineering 2023年第10期15卷 2676-2686页

作者： Claudia Regina Bernardi Baldin Maiky Yamato Kawanami Weiner Gustavo Silva costa Vitor Reinaldo Bordignon Cristhyano Cavali da Luz Ronaldo Luis dos santos Izzo Federal University of Technology-Paraná CuritibaBrazil

Fiber-reinforced soils have been increasingly used in geotechnical *** the years,research has sought to understand and investigate the influences of fibers as reinforcement in soilefiber *** study assessed the behavior of clayey soil in the city of Curitiba(Paraná,Brazil),adding rice husk fiber(RHF),an industrial waste from Cooperativa Agroindustrial in Alegrete(Rio Grande do Sul,Brazil).To evaluate the effect of the presence of natural RHF on the mechanical behavior of compacted soil,aspects such as the influence of fiber content and the drained and undrained behaviors of the soil were evaluated through unconfined triaxial compression *** following tests were realized:soil granulometry,specific mass of solids and Atterberg *** were produced in quadruplicate for the soil and mixtures using the RHF contents of 0.5%,0.75%,1%and 1.5%to determine the unconfined compressive strength(UCS).Triaxial tests were realized on a pure soil specimen and the specimens with 1%RHF under confining pressures of 50 kPa,100 kPa,200 kPa and 400 *** interactions at the interface between husk surface and soil were analyzed using scanning electron microscopy(SEM).In UCS tests,specimens with RHF percentages of 1%and 1.5%presented the highest results,with an increment of 36%compared to the soil without *** results of the consolidated drained triaxial compression tests show that in terms of effective stress,there was a small difference in the strength of the compacted pure soil and soil with the addition of *** the undrained tests,the strength increased with the inclusion of husk,with a reduction of 50%in cohesion and an increment of 22%in friction angle for specimens containing RHF compared to the soil without RHF additions.

关键词： Clay soil Rice husk Soil reinforcemen

Auriculotherapy in primary health care: A large-scale educational experience in Brazil

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j.urnal of Integrative Medicine 2019年第4期17卷 302-309页

作者： Charles dalcanale Tesser Ari Oj.da Ocampo More Melissa costa santos Emiliana Domingues Cunha da Silva Fatima Terezinha Pelachini Farias Lucio j.se Botelho Department of Public Health Federal University of Santa Catarina Floriandpolis Santa Catarina 88036-800 Brazil Post-graduate Program in Public Health Federal University of Santa Catarina Florianopolis Santa Catarina 88036-800 Brazil Integrative Medicine and Acupuncture Service University Hospital Federal University of Santa Catarina Floriandpolis Santa Catarina 88036-800 Brazil Floriandpolis Municipality Health Office Florianopolis Santa Catarina 88036-800 Brazil

Auriculotherapy consists of physical stimuli applied to the outer ear and is commonly associated with traditional Chinese medicine (TCM). The authors present and discuss the development of a course that offers a semi-on-site auriculotherapy course for Brazilian primary health care (PHC) professionals. The course was funded by the Brazilian Ministry of Health and developed at the Federal University of Santa Catarina in 2015 by a team of experts in auriculotherapy. It consisted of 75 h of distance learning (five sequential modules) and 5 h of on-site learning. The modules included the following items:(1) introduction to integrative practices;(2) ear reflexology;(3) introduction to TCM;(4) biomedical view of auriculotherapy;and (5) auriculotherapy in PHC. The teaching material in eluded a workbook for each module, 14 video lectures and an interactive ear(on line resource) to study location and application to the main auricular points. The on-site lectures follow a structured script of ear palpation techniques, auricular seed insertion practice and clinical case discussions, under the supervision of trained instructors. The course was offered in 2016 and 2017 and on-site lectures took place in 25 cities, covering all Brazilian regions, in coordination with municipal or state boards of health. A total of 4273 health professionals concluded the training and their evaluation of the course was highly positive. The Brazilian experience of large-scale training shows the potential to disseminate auriculotherapy in the context of PHC, given that its practice is fast, easy to learn, safe, effective for different health problems and well accepted by the patients.

关键词： Auriculotherapy Traditional Chinese medicine Primary health care Health education Distance learning

Active packaging for lipid foods and development challenges for marketing

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Food Bioscience 2022年第1期45卷 20-33页

作者： Erica da costa Moncao Cristiani Viegas Brandao Grisi j.naína de Moura Fernandes Priscila santos Souza Antonia Lucia de Souza Programa de Pos-Graduacao Em Ciencia e Tecnologia de Alimentos Universidade Federal da ParaíbaJoao PessoaPB58051Brazil Programa de Pos-Graduacao Em Tecnologia Agroalimentar Universidade Federal da ParaíbaBananeiras-PB58220-000Brazil Programa de Pos-Graduacao Em Química Universidade Federal da ParaíbaJoao PessoaPB58051Brazil

Consumer demand for natural products with low concentration of additives and controlled environmental impact has been a maj.r challenge for the lipid food packaging *** of this fact,active packaging such as oxygen absorbers and antioxidant releasers are trends in the *** this work,research developed on oxygen absorbing packaging and antioxidant-releasing packaging will be *** work will also reveal the challenges to *** that slows down lipid oxidation in food presents satisfactory results and greater efficacy than vacuum *** challenges for the development of active packaging that consist of biopolymers and natural additives are related to the physical and mechanical properties of the *** research should develop biodegradable active packaging that are resistant to industrial ***,there are plenty of natural resources not yet studied and that may be applicable for the development of active oxygen-absorbing and antioxidant active packaging for food.

关键词： Oxygen absorbers Antioxidants Food packaging Lipids Oxidation

Exploring the synthesis conditions to control the morphology of gold-iron oxide heterostructures

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Nano Research 2019年第8期12卷 1781-1788页

作者： Pablo Tancredi Luelc Souza da costa Sebastian Calderon Oscar Moscoso-Londono Leandro M. Socolovsky Paulo j. Ferreira Diego Muraca daniela Zanchet Marcelo Knobel Laboratory of Amorphous Solids INTECINFaculty of EngineeringUniversity of Buenos Aires - CONICETBuenos AiresCP C1063ACVArgentina Department of Inorganic Chemistry Institute of ChemistryUniversity of Campinas (UNICAMP)CP615413083-970CampinasSPBrazil Brazilian Nanotechnology National Laboratory (LNNano) Rua Giuseppe Maximo Scolfaro 10000CampinasSPBrazil International Iberian Nanotechnology Laboratory (INL) Av. Mestre Jose Veiga s/n4715-330 BragaPortugal “Gleb Wataghin” Institute of Physics University of Campinas (UNICAMP)CEP 13083-859CampinasSPBrazil Autonomous University of Manizales Antigua Estacion del FerrocarrilManizalesCP 170001Colombia Facultad Regional Santa Cruz Universidad Tecnoldgica Nacional - CIT Santa Cruz (CONICET)- Av delos Inmigrantes 555Rio GallegosSanta CruzArgentina Materials Science and Engineering Program The University of Texas at AustinAustinTexas 78712USA

Gold-iron oxide nano-heterostructures with a clear and well-defined morphology were prepared via a seed-assisted method. The synthesis process and the events of heterogeneous nucleation during the decomposition of the iron precursor were carefully studied in order to understand the mechanism of the reaction and to tailor the architecture of the fabricated heterostructures. When employing Au seeds of 3 and 5 nm, nanoparticles with a dimer-like morphology were produced due to the occurrence of a single iron oxide nucleation event. Otherwise, multi-nucleation events could be favored by two mechanisms:(i) by the incorporation of a reducing agent and the slowing down of the heating protocol, leading to a core-shell system;(ii) by the increase of the Au seed size to 8 nm, leading to a flower-like system. Further increase of the Au seed size to 12 nm using similar synthesis conditions promotes the homogeneous nucleation and growth of the iron oxide phase, without formation of heterostructures. An in-depth study was performed on the gold-iron oxide heterostructures to confirm the epitaxial growth of the oxide domain over the Au seed and to analyze the elemental distribution of the components within the heterostructures. Finally, it was found that the modification of the plasmonic properties of the Au nanoparticles are strongly influenced by the architecture of the heterostructure, with a more pronounced damping effect for the systems produced after multi-nucleation events.

关键词： nanoparticles gold-iron oxide heterostructures heterogeneous nucleation epitaxial growth HR-microscopy

The corpus cavernosum after treatment with dutasteride or finasteride： a histomorphometric study in a benign prostatic hyperplasia rodent model

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Asian j.urnal of Andrology 2018年第5期20卷 505-510页

作者： Marcello H A da Silva Waldemar S costa Francisco j.B Sampaio Diogo B De Souza Urogenital Research Unit Rio de Janeiro State University Rio de Janeiro RJ 20551-030 Brazil

Erectile dysfunction is a common side effect of finasteride and dutasteride treatments. The obj.ctive of this study was to investigate the structural changes in the penis using a benign prostatic hyperplasia （BPH） rodent model treated with dutasteride or finasteride. Sixty male rats were divided into the following groups： C, untreated control rats; C ＋ D, control rats receiving dutasteride; C ＋ F, control rats receiving finasteride; H, untreated spontaneously hypertensive rats （SHRs）; H ＋ D, SHRs treated with dutasteride; and H ＋ F, SHRs treated with finasteride. Treatments were performed for 40 days, and penises were collected immediately thereafter. The organs were analyzed using histomorphometric methods to determine the cross-sectional penile area, as well as the surface density （Sv） of smooth muscle fibers, connective tissue, elastic system fibers, and sinusoidal spaces of the corpus cavernosum. The results were compared using a one-way ANOVA with Bonferroni＇s posttest. Groups C ＋ D and C ＋ F had a significantly smaller penile cross-sectional area, but more elastic system fiber Sv compared to Group C. Group C ＋ D showed less smooth muscle Sv, and Group H showed more connective tissue but a smaller sinusoidal space Sv in the corpus cavernosum compared to Group C. Groups H ＋ D and H ＋ F had less smooth muscle Sv than Group H. Group H ＋ D also had more connective tissue and elastic system fiber Sv than Group H. Both dutasteride and finasteride promoted penile modifications in the control rat penis, although this affect was ~reater in Group H animals. In this rodent model, dutasteride was the drug that most affected the corpus cavernosum.

关键词： animal models benign prostatic hyperplasia dutasteride erectile dysfunction finasteride penis