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Opus Journal Demo

Vol 23, Issue 3,2033

Opus Journal Demo

Vol 3, Issue 5,2024

Opus Journal Demo

Vol 43, Issue 2,2024

Opus Journal Demo

Vol 123, Issue 23,2023

Opus Journal Demo

Vol 12, Issue 23,2023

Opus Journal Demo

Vol 2, Issue 4,2023

Natural polyphenols, ferulic acid (FA) and hesperetin (Hp) were tested for their Fe3+-reducing power, using the TPTZ methodology, as a first step to rank them according to their antioxidant potential. Ranking also included quercetin (Qt), a very well-studied natural, polyphenolic antioxidant, and ascorbic acid (AA). All phenolics considered were al...

By Marie Aoun, Dimitris P Makris

Paeonia peregrina Mill. and Paeonia tenuifolia L. are endangered species of herbaceous plants with high ornamental and medicinal values. There are a few natural habitats in Serbia where these plants spontaneously grow: Krivi Vir, Skrobnica, Golina, Pirot, Deliblato Sands, and Sokobanja, in the municipality of Knjaževac. In July 2021, the symp...

By Sara Mikić, Tatjana Marković, Nina Vučković, Željana Prijić, Jingqi Xue

Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test Test test ...

By Mladen Babic Layout 2, Mladen Autor

This paper is a comparative survey of the National Food Safety Systems (NFSS) of the European Union (EU) Member-States (MS) and the Central EU level. The main organizational structures of the NFSS, their legal frameworks, their responsibilities, their experiences, and challenges relating to food safety are discussed. Growing concerns about food saf...

By Andreas Hadjigeorgiou, Elpidoforos S. Soteriades, Anastasios Philalithis, Anna Psaroulaki, Yiannis Tselentis, Achilleas Gikas

This study was designed to investigate the impact of different extraction methods (ultrasound-assisted extraction, maceration, and microwave-assisted extraction) on the content of polyphenols and biological activities of leaf extract of Paeonia daurica subsp. daurica collected in Južni Kučaj (Serbia). The total polyphenol and flavonoid c...

By Petar Batinić, Natalija Čutović, Aleksandra Jovanović, Dejan Stojković, Gokhan Zengin, Tamara Carević, Željana Prijić, Aleksandar Marinković, Tatjana Marković

The aims of the present research were to develop and characterize 4-hydroxycoumarin-loaded liposomes via the determination of encapsulation efficiency, antioxidant capacity, vesicle size, polydispersity index (PDI), zeta potential, conductivity, mobility, density, surface tension, viscosity, and 60-day storage stability. The encapsulation efficien...

By Aleksandra A. Jovanović, Edina Avdović, Ana Plećić, Vojislav Ćirić, Branko Bugarski, Zoran Marković

Relatively simple, but very reliable, one-step qualitative/quantitative HPLC analysis of four key flavonoids, and a phenolcarboxylic acid, has been introduced. For substrate/sample preparations, either triple percolations, using 70% ethanol-water (V/V), or/and ultrasonic bath methanol extractions, were carried out to obtain the desired isolates yi...

By Vanja Tadić, Dragica Bojović, Goran Marković, Ivana Nešić, Ana Žugić

The microbiological stability of cosmetic products is crucial, especially in products with high water content, such as creams. Therefore, preservatives are used in order to protect consumers from harmful pathogens that would otherwise invade the cosmetics. Despite their function, the addition of preservatives can be considered controversial in the...

By Tatjana Stević, Nemanja Krgović, Jelena Mudrić, Nada Ćujić Nikolić, Ana Žugić, Dubravka Bigović, Tea Ganić, Katarina Šavikin

In this study, antimicrobial activity of essential oils extracted from the aerial flowering parts (herbs) of Hyssopus officinalis subsp. aristatus (Godr.) Nyman (Lamiaceae) collected from five different locations in Montenegro, or purchased in Serbia, were investigated. In addition, their antibacterial activity in combination with antibiotics was ...

By Tijana Mićović, Dušan Ušjak, Marina Milenković, Stevan Samardžić, Zoran Maksimović

Dental caries is one of the most prevalent public health problems. It is caused by a well-organized bacterial structure i.e., biofilm, where the cariogenic bacteria Streptococcus mutans is recognized as the primary pathogenic factor. Furthermore, the first phase of dental biofilm onset is predominantly associated to bacteria of the Streptococcus g...

By Milica Nemoda, Biljana Nikolić, Tatjana Vukotić, Dragana Rakašević, Dejan Marković, Milica Jovičić, Jelena Marinković

This journal is Formerly known as a Test Journal