Results 21 to 30 of about 11,124,318 (249)

Effect of oviposition by Bactrocera dorsalis on the antioxidant activity of orange juice [PDF]

open access: yesBrazilian Journal of Biology, 2019
Among fruits and fruit products, oranges and orange juice are the most widely consumed worldwide. However, the effects of pest infestation of oranges on the quality of orange juice are not yet known.
M. Ni   +6 more
doaj   +1 more source

Spectrophotometric determination of some theophylline derivatives

open access: yes, 1988
A spectrophotometric method for the determination of 8-chlorotheophylline, diprophylline and oxyethyltheophylline, is presented. Spectrophotometric determinations were carried out in CH3OH, 0.5 mol dm-3 H2SO4 4.65 mol dm-3 KOH, respectively.
Nikolić, Kosta, Medenica, Mirjana
core   +7 more sources

Antimicrobial and Antioxidant Activity of Black Elder, Stinging Nettle, Marigold and Ribwort Plantain

open access: yesScientific Papers Animal Science and Biotechnologies, 2023
The aim of the study was to determine antimicrobial and antioxidant activity of plant extracts against pathogenic microorganisms in vitro. Extracts of black elder (Sambucus nigra L.), stinging nettle (Urtica dioica L.), marigold (Calendula officinalis L.)
Miroslava Kačániová   +7 more
doaj  

Development of Spectrophotometric method for quantitative determination of dexamethasone in pharmaceutical preparations

open access: yesTikrit Journal of Pure Science, 2023
This Study is concerned a fast, easy, sensitive, accurate and economical spectrophotometric method for the determination of Dexamethasone. This method based on the use of UV- spectra measurements at 242 nm.
Rafal Abdulraheem Abdullah   +1 more
doaj   +1 more source

Spectrophotometric method for determination of Glucosamine Sulphate in dosage forms by derivatization using Quality by Design approach [PDF]

open access: yesRecords of Pharmaceutical & Biomedical Sciences, 2018
A Quality by Design approach was used to develop a sensitive spectrophotometric method for determination of glucosamine Sulphate in pharmaceutical dosage forms and optimize a derivatization reaction of glucosamine with o-phthalaldhyde.
rasha ahmed   +3 more
doaj   +1 more source

Spectrophotometric method for simultaneous estimation of atenolol in combination with losartan potassium and hydrochlorothiazide in bulk and tablet formulation

open access: yesJournal of Pharmacy and Bioallied Sciences, 2010
Aim : To develop a simple, accurate, rapid and precise UV spectrophotometric method for the estimation of atenolol in combination with losartan potassium and hydrochlorothiazide.
Sanjay Bari   +3 more
doaj   +1 more source

Development of method for the mineral water catalase activity determination

open access: yesTrudy Odesskogo Politehničeskogo Universiteta, 2014
Biological effects of mineral water depend not only on the chemical composition but also on the metabolic products of microbial cenosis. Among numerous microorganisms constituting the autochthonous microflora of mineral waters, we do evolve the ...
O. М. Нiкiпелова   +2 more
doaj   +4 more sources

Development of spectrophotometric method for simultaneous estimation of diclofenac sodium and papaverine hydrochloride in tablets based on simultaneous equation method

open access: yesCurrent Issues in Pharmacy and Medical Sciences, 2012
A simple, rapid, accurate and precise spectrophotometric method for simultaneous estimation of diclofenac sodium and papaverine hydrochloride in combined tablet and the dissolution media used in the release studies has been developed.
Regina Kasperek   +4 more
doaj   +1 more source

A Study of the Antioxidant, Cytotoxic Activity and Adsorption Properties of Karelian Shungite by Physicochemical Methods

open access: yesAntioxidants, 2021
This study reveals that fossil shungite samples exhibit antioxidant activity, can reduce oxidized components, and bind to free radicals. A sample of Sh20 (size fraction—20 μm) (1.30 mg equivalents of ascorbic acid/g of shungite; 3.46 mg equivalents of ...
Liubov Skrypnik   +7 more
doaj   +1 more source

Simultaneous Determination of Xipamide and Triamterene by First Derivative, Ratio Difference, and Derivative Ratio Spectrophotometric Methods

open access: yesArchives of Pharmaceutical Sciences Ain Shams University, 2021
Validated, rapid and sensitive spectrophotometric techniques were established for simultaneous determination of Xipamide and Triamterene. The first technique based on determination of Triamterene with zero-crossing of Xipamide using zero order method at ...
Nermin Victor   +3 more
doaj   +1 more source

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