Results 81 to 90 of about 182,970 (169)
Pest Management Science, EarlyView.The bio‐guided phytochemical study resulted in the new compound 17‐epi‐melianodiol. The compound eliminated 100% of Aedes aegypti larvae at 100 ppm, causing pronounced morphological changes, cuticular damage, and extensive vacuolization. Abstract BACKGROUND In Brazil, Aedes aegypti is the primary vector of arboviruses such as dengue, chikungunya ...
Kethleen Duarte Crespo Soares +8 more
wiley +1 more source
POTENTIOMETRIC DETERMINATION OF CAPTOPRIL IN PHARMACEUTICAL FORMULATIONS
Eclética Química, 2018 A simple, precise, rapid and low-cost potentiometric method for captopril determination in pure form and in pharmaceutical preparations is proposed. Captopril present in tablets containing known quantity of drug was potentiometrically titrated in aqueous
P. R. da S. RIBEIRO +3 more
doaj +1 more source
Dendrimeric Antigens for Passive Mast Cell Activation in the Evaluation of Amoxicillin Allergy
Allergy, EarlyView.DeAns with defined nanoscale structure reveal that conjugate size and determinant density govern IgE‐mediated effector‐cell activation in AX allergy. All DeAn generations bind to sIgE in inhibition immunoassay, but only larger DeAns trigger FcεRI‐dependent responses in mouse MC, huRBL‐2H3, and LUVA cells.
Amene Tesfaye Ayane +12 more
wiley +1 more source
Benign by design: A paradigm shift in cosmetic ingredient development
International Journal of Cosmetic Science, EarlyView.Benign by design strategies enable the creation of biodegradable cosmetic ingredients, reducing environmental persistence while maintaining the intended biological activity. This work compiles design rules and tools to guide the development of more sustainable molecules for the cosmetics industry.
Sandra Mota +3 more
wiley +1 more source
Antimicrobial and Antioxidant Activities of the Essential Oil of Resin of
Natural Product Communications, 2006 The essential oil obtained by hydrodistillation from the fresh resin of Protium heptaphyllum was analyzed by GC/MS. The main constituents were: α-pinene (10.5%), α-phellandrene (16.7%), limonene (16.9%), and terpinolene (28.5%).
P. N. Bandeira +7 more
doaj +1 more source
Journal of Applied Polymer Science, Volume 143, Issue 30, August 10, 2026.Polyurethane films were prepared from andiroba (Carapa guianensis) and buriti (Mauritia flexuosa) oil‐derived polyols, emphasizing their potential as bio‐based materials. UV–Vis analysis indicates the retention of carotenoid‐related chromophoric features within the polymer matrix.
João A. P. da Silva +5 more
wiley +1 more source
Antibacterial and Antioxidant Activities of Ursolic Acid and Derivatives
Molecules, 2014 Ursolic acid, an important bioactive compound, was isolated from ethanol extract of aerial parts of Sambucus australis. In order to develop bioactive ursolic acid derivatives, two semi-synthetic compounds were obtained through modification at C-3.
Patrícia G.G. do Nascimento +7 more
doaj +1 more source
Advanced Synthesis &Catalysis, Volume 368, Issue 15, 1 August 2026.An enantioselective Mannich reaction using barbituric acids as nucleophiles provides access to chiral heterocycles bearing quaternary stereocenters. The transformation is catalyzed by a bifunctional thiourea with high selectivity. An immobilized catalyst enables recycling and application under continuous‐flow conditions, offering an efficient and ...
Rodrigo Sánchez‐Molpeceres +4 more
wiley +1 more source
Natural Product Communications, 2006 n-Hexane, chloroform and ethyl acetate fractions obtained from methanol extracts of the wood and roots of Esenbeckia almawillia (Rutaceae) were tested against five tumor cells lines (HL-60, CEM, B-16, HCT-8 and MCF-7).
Fátima M. Nunes +13 more
doaj +1 more source
Revista Brasileira de Educação Especial, 2018 RESUMO: A presente pesquisa procura responder uma questão complexa: Como favorecer uma educação inclusiva e, ao mesmo tempo, promover a aprendizagem da química em jovens no Ensino Médio?
J. Moreno, Wilmar de Jesús Murillo
semanticscholar +1 more source