Vol. 79 No. 7 (2026)

Published: 27-07-2026

Full Issue

Table of Contents

Mathematics

On the Theorems of Biernacki

Radoš Bakić

857–861
- Full Text

Chemistry

The Influence of Transmembrane Pressure on Flux and Ethanol Rejection during Nanofiltration of Mavrud Red Wines from Harmanli and Asenovgrad

Alex Georgiev, Viktor Prodanov, Maria Lyudmilova, Maria Dencheva-Zarkova, Julia Genova

862–870
- Full Text
Fast and Reliable Determination of Alkali and Alkaline-earth Elements in Biological Fluids Using Laser-induced Breakdown Spectroscopy

Krum V. Bardarov, Tanya Yordanova

871–880
- Full Text

Biology

Effect of the Cryopreservation Process on the CatSper Channels in Human Spermatozoa

Lora Gaydarova, Elena Hristova, Plamen Todorov

881–888
- Full Text

Geophysics

Knowledge-enhanced XGBoost for Wind Power Forecasting under Extreme Meteorological Events

Jin Ma, Ming Xu, Wei Du, Zhongzhi Qiao

889–897
- Full Text

Engineering Sciences

Novel Methods for Biofabrication and Stimulation of Engineered Living Materials

Spas Kerimov, Victoria Atanassova, Georgi Yankov, Radostin Stefanov, Ekaterina Iordanova, Georgi Marinov

898–903
- Full Text
Oil Spill Detection in UAV-based Environmental Monitoring Using Lightweight Deep Learning Architectures

Yue Zheng, Chengjian Dong, Cheng Gu, Anna Aleksieieva, Oleksiy Kozlov, Ivan Sova, Mykola Demchyna, Maksym Maksymov

904–912
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Classification of Video Dynamic Texture Based on Lie-SVM

Zhigui Li, Zhiyuan Zhu, Mingliang Zheng

913–922
- Full Text

Medicine

Distribution and Evolution of cagA, cagE, and vacA Genes among Helicobacter pylori Isolates in Bulgaria

Liliya Boyanova, Lyudmila Boyanova, Daniel Yordanov, Raina Gergova, Rumyana Markovska

923–930
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Decoding Pediatric Vaccination Research: A Decade-long Bibliometric Analysis of Global Trends, Hotspots, and Emerging Frontiers

Hüseyin Ilgın Bal, Yunus Emre Avcı

931–938
- Full Text
Advanced Paternal Age and Partnered Intrauterine Insemination Outcomes

Ralica Petkova, Desislava Dyulgerova-Nikolova, Tanya Milachich, Maria Yunakova

939–945
- Full Text
Assessment of the Products of Systemic Lupus Erythematosus (SLE) Genetic Predisposition Biomarkers in Bulgaria

Valentina Reshkova, Dobroslav Kyurkchiev

946–953
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Differences in the Expression of OCT4A, SOX2, and NANOG in Human Mesenchymal Stem/stromal Cells Derived from Adipose Tissue and Umbilical Cord

Snejana Kestendjieva, Milena Kostadinova, Mihail Chervenkov, Milena Mourdjeva, Lyubomir Djerov, Elena Stoyanova

954–962
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Restoring Function, Aesthetics, and Confidence: A Multi-country Study of Pediatric Prosthetic Outcomes and Dental Practice Patterns

Zeeshan Qamar, Mahesh Shenoy, Nishath Sayed Abdul, Cristalle Soman, Oubada Suliman, Khalid Alnajjar, Naveen Reddy Ramireddy

963–972
- Full Text

Agricultural Sciences

Classification of Winter Wheat Genotypes Based on Grain Yield Components Using K-means Clustering in Multi-environment Trials

Georgi Raykov

973-980
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Forage Quality of Naturally Restored Legume Species from Burnt Grasslands

Tatyana Bozhanska, Galina Naydenova, Alexandrina Ignatova, Mariana Radkova, Georgy Kunev, Svetoslav Anev, Katerina Stefanova, Miglena Revalska, Anelia Iantcheva

981–990
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Trends in the Biochemistry of Certain Cherry Varieties under the Influence of Climate Change

Anton Sotirov

991–999
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Effect of Dietary Tenebrio molitor Meal on the Production Performance and Egg Quality of Laying Hens

Teodora Popova, Evgeni Petkov, Desislava Vlahova-Vangelova, Nikolay Kolev, Desislav Balev, Krasimir Dimov, Stefan Dragoev

1000–1010
- Full Text