0000000000676397

AUTHOR

Vera Lucia Borges Isaac

showing 4 related works from this author

Caffeine analysis and extraction from a topical cream intended for UV-skin protection

2020

Made available in DSpace on 2021-06-25T10:16:59Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-01-01 This study aimed to develop and validate a method for the analysis of caffeine in complex cosmetic samples, such as sunscreens. Besides, an extraction method of caffeine from coffee oil and from creams, which contains both lipophilic and hydrophilic components, has been developed. The method to analyze caffeine was developed using an isocratic pump, Waters 1515 and an automatic injector Perkin-Elmer Series 200 and an UV detector Perkin-Elmer. As stationary phase, Kromasil C-18 (150 × 4.6 mm ID with particle size of 5 µm) column was used and a mixture of water (pH 4.00)/acetonitrile (…

emulsionSkin protectionSunscreensChromatographyPolymers and PlasticsExtraction (chemistry)02 engineering and technology021001 nanoscience & nanotechnologySurfaces Coatings and Filmschemistry.chemical_compoundTopical cream020401 chemical engineeringchemistrychemical analysisEmulsionextractionExtraction methods0204 chemical engineeringPhysical and Theoretical Chemistry0210 nano-technologyCaffeinecaffeineJournal of Dispersion Science and Technology
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Release and permeation profiles of spray-dried chitosan microparticles containing caffeic acid

2018

Made available in DSpace on 2018-12-11T17:17:17Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-03-01 Caffeic acid (CA), a phenolic compound found in plants with antioxidant and antimicrobial activity, induces collagen production and prevents premature aging of the skin. The objective of this study was to develop two types of chitosan microparticles (MP) containing CA and to relate the morphology with the release and permeation profiles. One type of MP was prepared from a hydroalcoholic solution (MPI) and the other from an aqueous solution (MPII). Their morphology and size was evaluated by high-resolution scanning electron microscopy. The release profile of CA was evaluated using the…

Premature agingPharmaceutical Science02 engineering and technology030226 pharmacology & pharmacyArticleChitosan03 medical and health scienceschemistry.chemical_compound0302 clinical medicineCaffeic acidChitosan microparticlesControlled releaseCellulosePharmacologyCaffeic acidChromatographyAqueous solutionlcsh:RM1-950PermeationPermeation021001 nanoscience & nanotechnologyControlled releaseMembranelcsh:Therapeutics. PharmacologychemistrySpray-dryer0210 nano-technologySaudi Pharmaceutical Journal
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Guava: phytochemical composition of a potential source of antioxidants for cosmetic and/or dermatological applications

2017

Made available in DSpace on 2018-11-28T14:21:45Z (GMT). No. of bitstreams: 0 Previous issue date: 2017-01-01. Added 1 bitstream(s) on 2019-10-09T18:26:25Z : No. of bitstreams: 1 S1984-82502017000200612.pdf: 803011 bytes, checksum: 199524e8d40cccb25490594ec61b3ed8 (MD5) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) PADC-FCF-UNESP Fundação para o Desenvolvimento da UNESP (FUNDUNESP) Guava (Psidium guajava L.) is a native fruit of the American tropics with commercial applications for its taste, flavor and aroma. Numerous pharmacological uses have been described for it, such as the antiseptic effect of it…

0301 basic medicineAntioxidantP. guajava L./use in cosmeticsmedicine.medical_treatmentlcsh:RS1-44101 natural scienceslcsh:Pharmacy and materia medica03 medical and health scienceschemistry.chemical_compoundmedicineOrganic chemistryFood scienceGeneral Pharmacology Toxicology and PharmaceuticsP.guajava L./use in cosmeticsAromaFlavorPsidiumP. guajava L./antioxidant/chemical compositionABTSbiologyP.guajava L./antioxidant/chemical compositionP.guajava L./phytochemistrybiology.organism_classificationFree radical scavengerP.guajava L/chemical stabilityHigh Performance Liquid Chromatography0104 chemical sciences010404 medicinal & biomolecular chemistry030104 developmental biologychemistryP. guajava L./phytochemistryQuercetinKaempferolP. guajava L/chemical stability
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Guava: phytochemical composition of a potential source of antioxidants for cosmetic and/or dermatological applications

2022

ABSTRACT Guava (Psidium guajava L.) is a native fruit of the American tropics with commercial applications for its taste, flavor and aroma. Numerous pharmacological uses have been described for it, such as the antiseptic effect of its leaves, the use of the fresh fruit and tea from its leaves for the treatment of diarrhea, dysentery, diabetes mellitus, and others. However, considering its rich composition, the guava also is a potential source of antioxidants to be used in the development of new formulations for cosmetic and/or dermatological applications, the main focus of this research. Herein, we describe the study of the phytochemical composition and the antioxidant activity of a guava e…

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