Founded in 1948 by academician Georgy Nadjakov, "Comptes rendus de l’Académie bulgare des Sciences" is also known as "Доклади на БАН","Доклады Болгарской академии наук" and "Proceedings of the Bulgarian Academy of Sciences". If applicable, the name of the journal should be abbreviated as follows: C. R. Acad. Bulg. Sci. (according to ISO.) Related subjects: Astronomy, Mathematics, Physics, Chemistry, Biology, Geology, Geophysics, Space Sciences, Engineering Sciences, Physical Geography, Medicine,…
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Engineered living materials (ELMs) that contain photosynthetic microorganisms are promising low-energy platforms for biological carbon capture. Here, we report the fabrication and 33-day evaluation of fibrous alginate hydrogels embedding Chlorella vulgaris . Each construct contained 0.5 g dry algal biomass in an approximately 40 g hydrated material matrix and provided an effective surface area of…
This paper presents the development and evaluation of a lightweight onboard deep learning module for real-time oil spill detection within a distributed UAV-based maritime environmental monitoring system. The study investigates four object detection architectures under controlled training conditions using both baseline and augmented dataset configurations: three convolutional one-stage detectors…
In order to more accurately measure the dynamic texture pattern of video clips, it is necessary to analyze the topological space of this pattern; to this end, we propose a method for classifying video clips based on dynamic texture features and a support vector machine (SVM) with a Lie group kernel. First, the autoregressive moving average model (ARMA) is established to describe the dynamic…
Cryopreservation of spermatozoa is a routine procedure used in assisted reproductive technologies. However, there is limited data on its effect on the specific Ca 2+ channels involved in the key processes of capacitation and hyperactivation of the male gametes. The influence of two different cryopreservation methods upon the CatSper index (CI) of human male gametes has been investigated. After…
Nanofiltration technology is an effective technique for reducing alcohol content in wine. This study examines nanofiltration experiments conducted with Bulgarian Mavrud red dry wines sourced from the Harmanli and Asenovgrad regions, utilizing a MaxiMem – PS Prozesstechnik GmbH membrane filtration system equipped with an Alfa Laval NF99HF polyester membrane (MWCO 300 Da). The experiments were…
This work is focused on the development of a quantitative assay for the determination of Na, K, Ca, Mg, and Li in blood serum, urine, and saliva by a simple procedure using single pulse laser-induced breakdown spectroscopy (LIBS). All analyses were performed on samples in the form of homogeneous glass-supported polyacrylamide gel films containing Rb and Ba as internal standards. No additional…
Helicobacter pylori is a species with a highly plastic genome encoding numerous virulence factors, such as the pathogenicity island ( cag PAI) and vacuolating cytotoxin A (VacA). cag PAI consists of more than 26 genes, with cagA and especially cagE being essential predictors of cag PAI intactness. vacA gene has numerous allelic variations, among which s1m1i1 is the most virulent. The aim of our…
Pediatric vaccination is a key component of global public health; however, the rapid growth of the literature requires a comprehensive and up-to-date overview of research trends and thematic developments. This study aimed to map pediatric vaccination research published between 2016 and 2025, focusing on publication trends, leading contributors, collaboration patterns, and evolving thematic…
The aim of this study was to evaluate the association between advanced paternal age (APA) and intrauterine insemination (IUI) outcomes. This retrospective cohort study included 861 IUI cycles in couples in which the female partner was ≤ 35 years. Patients were stratified according to paternal age into a control group (< 40 years) and a study group (≥ 40 years). The study group was further…
The scope of the current clinical trial is to investigate the products of systemic lupus erythematosus (SLE) genetic predisposition biomarkers and to determine those biomarkers that correlate with the clinical course of the disease. The present study includes 48 patients with SLE (43 women and 5 men) age 53 years with 4.32 points (min. 0 max. 12 points) of activity of SLE be SLEDAI-2K and 35…