Results 21 to 30 of about 273,868 (276)
Performance of Caffeine Content Analysis in Robusta sp and Theobroma cacao L using Iodometry, UV-Vis Spectrophotometry and High Performance Liquid Chromatography [PDF]
Journal of Pure and Applied Chemistry Research, 2020 Caffeine is a xanthine alkaloid compound found in Robusta sp and Theobroma cacao L. The caffeine extract was obtained by evaporating CHCl3 using a rotary evaporator and determine its content using iodometry, UV-Vis spectrophotometry and High Performance ...
Yeanchon H. Dulanlebit +5 more
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Jurnal Farmasi Sains dan Praktis, 2022 Borax is a dangerous material if it is contained in food so its use is prohibited. Borax contained in wet noodles is used as a preservative to keep the noodles supple and durable.
Rulyta Aulia Munandar +2 more
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Journal of Tropical Pharmacy and Chemistry, 2023 Jamu is made from the toga plant, which is still used medicinally in Indonesia. Rutin, a type of flavonoid component, is frequently present in herbal medicine pegel linu. Rutin serves as an antioxidant and anti-inflammatory by neutralizing free radicals,
Selma Septi Pratiwi +3 more
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Kovalen: Jurnal Riset Kimia, 2020 This study aims to determine the content of secondary metabolites and the levels of total secondary metabolites in ethanol extract of Okra (Abelmoschus esculentus L. Moench) fruit with UV-Vis Spectrophotometry method.
Joni Tandi +3 more
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Química Nova, 2011 This paper reports on a modification of the procedures originally described in the French Pharmacopoeia for the UV-visible spectrometric analysis of flavonoids, and proposes a validation of the method and its application in the determination of total ...
Carolina Hyppólito Alves Ferreira +1 more
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Química Nova, 2015 This work aimed to adapt the analysis of methemoglobin recommended by Evelyn - Malloy (visible spectrophotometry), in order to facilitate its application in the field, or to analysis in clinical laboratory, of existing sites of diflubenzuron application.
Cristiane Barata-Silva +5 more
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Photodegradation Study of Nystatin by UV-Vis Spectrophotometry and Chemometrics Modeling
Journal of AOAC INTERNATIONAL, 2014 Abstract Nystatin, one of the tetraene antifungal antibiotics, is very sensitive to light. Thus, when nystatin is exposed to natural daylight, it is photodegraded to products of lower biological activity. In this work, the photodegradation kinetics of nystatin was monitored by a UV-Vis spectrophotometry method.
Bahram, Hemmateenejad +3 more
openaire +2 more sources
Determination of Ni(II) in metal alloys by spectrophotometry UV-Vis using dopasemiquinone
Química Nova, 2010 A spectrophotometric method was proposed for Ni(II) determination in alloys using a dopa-semiquinone (L-1) to form [Ni(II)(L1-)3]1-, ε = 9.3 x 10³ L mol-1 cm-1. The optimal conditions for the determination were: wavelength 590 nm, temperature 25 °C,
Wagner José Barreto +5 more
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Correlation between UV-VIS spectra and the structure of Cu(II) complexes with hydrogenated dextran in alkaline solutions [PDF]
Hemijska Industrija, 2005 UV-VIS spectrophotometric investigations of Cu(II) complexes with hydroge-nated dextran showed that the complexation of Cu(II)-ions began at pH > 7. The formation of Cu(II) complexes with dextran monomer units was observed at pH 7-12.
Nikolić Goran S. +4 more
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Karakterisasi Senyawa Minyak Atsiri Ekstrak Etil Asetat Bawang Putih (allium sativum l.)
Indonesian Journal of Pharmaceutical Education, 2021 Garlic (Allium sativum L.) is one of tuber vegetable crops that is widely grown in various countries in the word and is often used as food spices and medicines. The purpose of this study was to characterize the volatile oil compound ethyl acetate extract
Muhammad Taupik +3 more
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