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2 results on '"Wellington da Silva Lyra"'

1. Molluscicidal Activity of the Essential Oil of Zingiber officinale Roscoe Rhizomes

Author

Adriana Crispim de Freitas, Victor Elias Mouchrek Filho, Paulo Roberto Barros Gomes, Maria do Livramento de Paula, Romer Pessôa Fernandes, Maria Alves Fontenele, Jeremias Caetano da Silva, Jonas Batista Reis, Wellington da Silva Lyra, Rayone Wesly Santos de Oliveira, and Hilton Costa Louzeiro

Subjects
biology, Traditional medicine, 010405 organic chemistry, Organic Chemistry, Aquatic animal, biology.organism_classification, 01 natural sciences, Biochemistry, 0104 chemical sciences, Analytical Chemistry, law.invention, Aquatic organisms, Rhizome, 010404 medicinal & biomolecular chemistry, law, Biomphalaria glabrata, Zingiber officinale, Essential oil, Freshwater mollusc
Abstract

This work evaluated the molluscicidal activity of the essential oil of the Zingiber officinale Roscoe rhizomes in with of the Biomphalaria glabrata species. The essential oil was isolated q...

Published
2019
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2. Biamperometric Determination of Tetracycline in Pharmaceuticals

Author

Renato S. Lima, Everaldo Paulo de Medeiros, Glimaldo Marino, Valberes B. Nascimento, Mário César Ugulino de Araújo, Francisco Fernandes Gambarra Neto, and Wellington da Silva Lyra

Subjects
Detection limit, Chromatography, Tetracycline, Supporting electrolyte, Chemistry, Biochemistry (medical), Clinical Biochemistry, Relative standard deviation, Biochemistry, Analytical Chemistry, Tetracycline Hydrochloride, Sequential method, Reagent, Electrochemistry, medicine, Spectroscopy, medicine.drug
Abstract

A fast, reliable, and low cost biamperometric flow‐injection method, with an error of 1.3% and an analytical throughput of 55 samples h−1, for determination of tetracycline hydrochloride in pharmaceuticals capsules is proposed. The analytical curve was linear (r=0.998) in the range 10 to 50 mg l−1 using Fe(CN)6 3− and NaOH solutions as reagent and carrier stream/supporting electrolyte, respectively. A relative standard deviation of 1.6% (10 sequential injections of 30.0 mg l−1) was verified with detection and quantification limits of 0.6 and 3.4 mg l−1, respectively.

Published
2007
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