Accès ouvert
2026
article
OpenAlex
Alexandra G. Ivanova, Simona Ivanova, Dimitar N. Petrov, Vera Gledacheva et autres
Background: Fenugreek is a widely used aromatic herb valued as a food ingredient. Fenugreek seeds and leaves are rich in antioxidants and bioactive compounds that support overall health, particularly gastrointestinal function. The present paper describes a green synthesis of silver nanoparticles (AgNPs) …
bg
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Accès ouvert
2026
article
OpenAlex
Alexandra G. Ivanova, Mina Mihaylova Todorova, Dimitar N. Petrov, Vera Gledacheva et autres
Chlorella vulgaris is a microalga with well-established nutritional, antioxidant, anti-inflammatory, and antibacterial potential. The current study aimed to explore the green synthesis of silver nanoparticles (AgNPs) using the ethanolic extract of C. vulgaris and to assess how nanoparticle formation affects the chemical …
bg
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Accès ouvert
2025
article
OpenAlex
Petja Emilova Marinova, Nikola Tomov Burdzhiev, Evelina Varbanova, Slava Hristova Tsoneva et autres
(This paper presents the synthesis of a novel copper(II) metal complex with ethyl (2-(methylcarbamoyl)phenyl)carbamate and 3-methylquinazoline-2,4(1H,3H)-dione. The characterization of the compound was conducted through various techniques, including melting point determination, microwave plasma atomic emission spectrometry (MP-AES) for Cu, attenuated total reflection (ATR), …
bg
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Accès ouvert
2025
article
OpenAlex
Alexandra G. Ivanova, Mina Mihaylova Todorova, Dimitar N. Petrov, Zhana Y. Petkova et autres
This study presents the synthesis and characterization of silver nanoparticles (AgNPs) using two Spirulina platensis extracts: one of them cultivated in a bioreactor in Bulgaria (near Varvara village), and the other one from the local market in Bulgaria (Dragon Superfoods). To assess …
bg
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Accès ouvert
2025
article
OpenAlex
Mihaela Stoyanova, Miglena Milusheva, Milena Georgieva, Penyo Ivanov et autres
Background: Irritable bowel syndrome (IBS) is a prevalent gastrointestinal disorder with a complex pathogenesis that necessitates innovative therapeutic approaches for effective management. Among the commonly used treatments, mebeverine (MBH), an antispasmodic, is widely prescribed to alleviate IBS symptoms. However, challenges in delivering …
bg, ir
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Accès ouvert
2025
article
OpenAlex
G. Georgiev, Nicolás Coca-López, Dirk Lellinger, Luchesar Iliev et autres
ABSTRACT Raman spectra from the same sample might differ between instruments and over time depending on the spectrometer, optical path, or sample environment, among others. There is a need to harmonize and standardize characterization by Raman spectroscopy, enabling end users to share …
bg, es, de
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Accès ouvert
2025
article
OpenAlex
Katya Hristova, Irena P. Kostova, Tinko Eftimov, G. Patronov et autres
Despite notable advancements in the development of borate materials, improving their luminescent efficiency remains an important focus in materials research. The synthesis of lanthanum borates (LaBO3), doped and co-doped with europium (Eu3⁺) and dysprosium (Dy3⁺), by the solid-state method, has demonstrated significant …
bg, ca
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Accès ouvert
2024
article
OpenAlex
Mihaela Stoyanova, Miglena Milusheva, Vera Gledacheva, Iliyana D. Stefanova et autres
Background: Irritable bowel syndrome (IBS) has a major negative influence on quality of life, causing cramps, stomach pain, bloating, constipation, etc. Antispasmodics have varying degrees of efficacy. Mebeverine, for example, works by controlling bowel movements and relaxing the muscles of the intestines …
bg
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Accès ouvert
2024
article
OpenAlex
Petja Emilova Marinova, Dimitar Genchev Stoitsov, Nikola Tomov Burdzhiev, Slava Hristova Tsoneva et autres
The goal of this study is to synthesize, determine the structure, and examine the antimicrobial properties of novel Cu(II) and Au(III) complexes of 2,4-dithiouracil and its derivatives. These complexes were obtained by mixing aqueous solutions of the corresponding metal salts with the …
bg
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Accès ouvert
2024
article
OpenAlex
Miglena Milusheva, Mihaela Stoyanova, Vera Gledacheva, Iliyana D. Stefanova et autres
Irritable bowel syndrome (IBS) is a common gastrointestinal (GI) disorder characterized by abdominal pain or discomfort. Mebeverine is an antispasmodic that has been widely used in clinical practice to relieve the symptoms of IBS. However, its systemic use usually leads to side …
bg
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Accès ouvert
2024
preprint
OpenAlex
Petja Emilova Marinova, Dimitar Genchev Stoitsov, Nikola Tomov Burdzhiev, Slava Hristova Tsoneva et autres
The goal of this study is to synthesize, determine the structure, and examine the antimicrobial properties of novel metal complexes of 2,4-dithiouracil and its derivatives. These complexes were obtained by mixing aqueous solutions of the corresponding metal salts with the ligand dissolved …
bg
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Accès ouvert
2024
article
OpenAlex
Irena P. Kostova, Tinko Eftimov, Katya Hristova, Stefka Nachkova et autres
In this paper, we present the characteristics of photoluminescent YBO3 successfully synthesized through a solid-state reaction and a microwave-assisted method. We used yttrium oxide and boric acid in excess as the starting reagents. The synthesis conditions were reflected in the fluorescent characteristics …
bg, ca
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