Vol. 58 No. 4 (2023): Volume 58, Issue 4

Published: 2023-07-01

Articles

Convectional extraction of phenolic compounds from red fruits – chokeberry (aronia) and elderberry

Bohzidar Enchev, Maria Karsheva, Ralitsa Radoeva

639-644
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EPR spectroscopy investigation on the antioxidant efficacy of Sambucus Nigra L (dry flowers/blossom) extract

Kamelia Petkova-Parlapanska, Svetlomir Diankov, Maria Karsheva

645-653
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Preparation and antimicrobial activity of fucoidan containing collagen/(ZnTiO₃/SiO₂) composites

Todorka G. Vladkova, Boris L. Martinov, Anna D. Staneva, Iliana At. Ivanova, Dilyana N. Gospodinova, Madalina G. Albu-Kaya

654-663
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Comparative analysis of antibacterial activity and physicochemical properties of peppermint and cornmint essential oils and their main compound menthol

Vanya Gandova, Hafize Fidan, Ivan Iliev, Veska Lasheva, Stanko Stankov, Albena Stoyanova, Nikolay Yavorov

664-671
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Oxidation of aniline by iron (III) in the presence of bipyridyl in SDS/Triton X-100 mixed micelles. Applicability of Berezin pseudo phase model

Rama Satya Sarveswara Srikanth Vemuri, Shyamala Pulipaka, Venkata Nagalakshmi Kilana

672-681
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Removal of H₂S and CO₂ from biogas by algae-assisted bioelectrochemical system with oxygenic and anoxygenic photosynthesis

Anatoliy Angelov, Svetlana Bratkova, Rosen Ivanov, Polina Velichkova

682-689
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Investigations of solvent parameters on acidity dissociation constants of bromocresol purple in water-dioxane media

Sokaina Saad Hemdan, Asma Mansour Al Gebali, Fatma Khairallah Ali

690-699
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Zircon ceramic pigments synthesized from waste product by petroleum industry

Tsvetan Dimitrov, Irena Markovska, Mariela Minova

700-706
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Doping effect of WO₃ on the structure and luminescent properties of ZnO-B₂O₃-Bi₂O₃:Eu³⁺ glass

Lyubomir Aleksandrov, Aneliya Yordanova, Margarita Milanova, Reni Iordanova, Margit Fabian

707-715
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Technological approach for production of silicate insulating materials and panels for decorative cladding of buildings

Krasimira Toncheva, Bojidar Jivov, Lyuben Lakov, Anna Staneva

716-724
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Change of the antimony anodizing kinetics by coating the electrode with a thin film

Emil Lilov, Vanya Lilova, Svetlozar Nedev, Stephan Kozhukharov, Alaa M. Adam, Christian Girginov

725-730
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Review of ion imprinted polymers nanofiber with technology electrospinning: An advanced materials for removal of heavy metal ions

Jaya Edianta, Octavianus Cakra Satya, Khairul Saleh, Frinsyah Virgo, Fiber Monado, Idha Royani

731-748
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Specifics of particulate matter dispersion in the atmosphere of a clay quarry

Maya Vatzkitcheva, Plamen Savov, Nikolay Kolev

749-755
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Characterization of mechanical properties of aluminium based composites reinforced with copper nanoparticles

Henry Kayode Talabi

756-762
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Microstructural characterization of compacted and extruded specimens made of aluminium alloy chips

Veselin Petkov, Rositza Dimitrova, Angel Velikov

763-771
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Melting of resource-saving alloys for precision Ni-Mo alloys: optimization of technical and economic indicators

Stanislav Hryhoriev, Ganna Shyshkanova, Olena Kulabnieva, Vasyl Ostapenko, Oksana Vodennikova, Anton Riabenko, Serhii Shumykin

772-782
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Role of pre-heat treatment in the formation of a favorable fine-grained structure in copper and brass for further deformation

Abdrakhman Naizabekov, Irina Volokitina, Evgeniy Panin, Vasily Rubanik, Yury Tsarenko

783-787
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Influence of stepped annealing on the properties of conductor wire after ingotless rolling-extrusion and drawing of aluminum alloys containing Zr, Ce, La and Fe

Vadim Bespalov, Denis Voroshilov, Viktor Berngardt, Sergey Sidelnikov, Sergey Lezhnev, Mikhail Motkov, Timofey Bermeshev, Alexander Durnopyanov, Diana Bespalova, Anastasiya Durnopyanova

788-797
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Development of rational chemical composition of special steel with increased mechanical and performance characteristics

Sergey Sheyko, Yuriy Belokon, Alona Kripak, Vadim Shalomeev, Volodymyr Tsyganov, Elena Kulabneva

798-805
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Changes in the properties of Fe37-3FN steel during ECAP-drawing

Andrey Volokitin, Abdrakhman Naizabekov

806-812
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Characteriation of boronized layers on X80 WCrV 18-04-01 steel and kinetic approach for boron diffusion

Sarra Laid, Mohammed Elamine Djeghlal, Mohamed Elhabri Rahmouni

813-817
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