Vol. 79 No. 9 (2026)

Published: 30-09-2026

Full Issue

Table of Contents

Chemistry

Green Synthesis of Nickel Nanoparticles Using Pomegranate Peel for Cr(VI) Removal from Wastewater: A Sustainable and Low-cost Approach

Kadriye Ozlem Saygi

1157–1166
- Full Text

Geology

Reconstructing Ancient Copper Smelting Practices in the Eastern Part of the Srednogorie Metallogenic Zone (SE Bulgaria) Using Slag Mineralogy and Chemistry

Nikoleta Tzankova

1167–1175
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Assessment of Undrained Soil Strength Using the Fall Cone Test and Empirical Modelling

Tina Đurić, Dragoslav Rakić, Jovana Janković Pantić, Jelka Lukić, Stevan Ćorluka

1176–1185
- Full Text

Physical Geography

Methodological Integration in Psycho-ecological Research: A Structured Study and Interdisciplinary Framework

Nadia Mateeva

1186–1190
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Geophysics

Modelling of a Macroseismic Impact Field for Bulgaria

Stela Simeonova, Dimcho Solakov, Irena Aleksandrova, Plamena Raykova

1191–1201
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Integrated Methodological Framework for Air Quality and Human Health Risk Assessment in Urban Areas

Reneta Dimitrova, Angel M. Dzhambov, Angel Burov, Danail Brezov, Margret Velizarova, Veronika Dimitrova, Nevena Germanova, Elena Hristova

1202–1211
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Surface Ozone Variability and Meteorological Drivers at Coastal and Mountain Sites in Bulgaria

Ventsislav Danchovski

1212–1219
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Engineering Sciences

Mathematical Modelling of Multiphase Induction Machines Based on the Phase-domain Approach

Chun Xiang Huang, Yifan Xu, Victor Busher, Valerii Tytiuk, Vitalii Kuznetsov, Mykola Babyak, Liudmyla Ivanova

1220–1229
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A Numerical Evaluation Performance of Bio-inspired Metaheuristic MPPT Algorithms for Low-power PV Systems

Rizky Ajie Aprilianto, Faiq Mananul Faqih, Tiang Jun-Jiat, Abdrabbi Bourezg, Abdelbasset Azzouz

1230–1237
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Medicine

Transperineal versus Transrectal Prostate Biopsy: Comparative Analysis of Efficacy and Safety

Angel Bozhkov, Yordan Dochev, Dmitrii Dmitrenko, Elenko Popov, Chavdar Slavov

1238–1246
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Fixed Ratio versus Z-score/LLN Interpretation in Spirometry: Effects on Ventilatory Pattern Classification

Muazzez Elçin Özkan, Mutlu Onur Güçsav, Damla Serçe Unat, Ömer Selim Unat, Mukaddes Hande Özgen, Erdal İlhan, Dilara Özdemir, Onur Akçay, Orhan Meral

1246–1253
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Associations of Acetylsalicylic Acid, Low-molecular-weight Heparin and Nattokinase Use with the Presence and Size of Subchorionic Hematoma in a Prospective Cohort

Boyan Terziyski, Irina Markova, Svetlozar Slavov, Sergei Slavov

1254–1260
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