Kalin Valentinov Ivanov

Dr. Kalin Valentinov Ivanov

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Research Focus & Metrics

Academic Career Length

6Years (2021-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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20 August 2021 in Nutrients
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Velislava TodorovaVelislava Todorova
Velislava Todorova
KIKalin Valentinov Ivanov
Kalin Valentinov Ivanov
Delattre CedricDelattre Cedric
Delattre Cedric
VNVanya Nalbantova
Vanya Nalbantova
Diana Karcheva-BahchevanskaDiana Karcheva-Bahchevanska
Diana Karcheva-Bahchevanska
Stanislava IvanovaStanislava Ivanova
Stanislava Ivanova
Adaptogens are synthetic compounds (bromantane, levamisole, aphobazole, bemethyl, etc.) or plant extracts that have the ability to enhance the body’s stability against physical loads without increasing oxygen consumption. Extracts from Panax ginseng, Eleutherococcus senticosus, Rhaponticum carthamoides, Rhodiola rosea, and Schisandra chinensis are considered to be naturally occurring adaptogens and, in particular, plant adaptogens. The aim of this study is to evaluate the use of plant adaptogens in the past and now, as well as to outline the prospects of their future applications. The use of natural adaptogens by humans has a rich history—they are used in recovery from illness, physical weakness, memory impairment, and other conditions. About 50 years ago, plant adaptogens were first used in professional sports due to their high potential to increase the body’s resistance to stress and to improve physical endurance. Although now many people take plant adaptogens, the clinical trials on human are limited. The data from the meta-analysis showed that plant adaptogens could provide a number of benefits in the treatment of chronic fatigue, cognitive impairment, and immune protection. In the future, there is great potential to register medicinal products that contain plant adaptogens for therapeutic purposes.

1 January 2022 in BioMed Research International
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VKVanya Rangelov Kozhuharov
Vanya Rangelov Kozhuharov
KIKalin Valentinov Ivanov
Kalin Valentinov Ivanov
Stanislava IvanovaStanislava Ivanova
Stanislava Ivanova
Background. The substances used in sport could be divided into two major groups: those banned by the World Anti‐Doping Agency and those which are not. The prohibited list is extremely detailed and includes a wide variety of both medicinal and nonmedicinal substances. Professional athletes are exposed to intense physical overload every day. They follow a relevant food regime and take specific dietary supplements, which is essential for the better recovery between trainings and competitions. However, the use of “nonprohibited” dietary supplements (DS) is not always completely safe. One of the risks associated with the use of dietary supplements is the risk of unintended doping—originating from contaminated products. The presence of undeclared compounds in the composition of DS is a serious concern. The aim of this study is to evaluate the risk of unintentional doping. Materials and Methods. Literature search was done through PubMed, Science Direct, Google Scholar, and Web of Science. Studies investigating the presence of undeclared compounds, in dietary supplements, banned by WADA met the inclusion criteria. The last search was conducted in June 2021. The present review is based on a total of 50 studies, which investigated the presence of undeclared compounds in DS. Results. The total number of analyzed DS is 3132, 875 of which were found to contain undeclared substances. Most frequently found undeclared substances are sibutramine and anabolic‐androgenic steroids. Conclusion. More than 28% of the analyzed dietary supplements pose a potential risk of unintentional doping. Athletes and their teams need to be aware of the issues associated with the use of DS. They should take great care before inclusion of DS in the supplementation regime.

8 December 2021 in Foods
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Stanislava IvanovaStanislava Ivanova
Stanislava Ivanova
Delattre CedricDelattre Cedric
Delattre Cedric
Diana Karcheva-BahchevanskaDiana Karcheva-Bahchevanska
Diana Karcheva-Bahchevanska
NBNiko Benbasat
Niko Benbasat
VNVanya Nalbantova
Vanya Nalbantova
KIKalin Valentinov Ivanov
Kalin Valentinov Ivanov
According to the World Health Organization, obesity has nearly tripled since the 1970s. Obesity and overweight are major risk factors for cardiovascular diseases, diabetes, inflammatory-mediated diseases, and other serious medical conditions. Moreover, recent data suggest that obesity, overweight, diabetes, and cardiovascular diseases are risk factors for COVID-19-related mortality. Different strategies for weight control have been introduced over the last two decades. Unfortunately, these strategies have shown little effect. At the same time, many studies show that plants might be the key to a successful strategy for weight control. Following the PRISMA guidelines for conducting systematic reviews, a search was conducted in PubMed, Web of Science, Scopus, and Embase using the following keywords: obesity, globesity, vegan, plant-based diet, etc. Our results show that vegan diets are associated with improved gut microbiota symbiosis, increased insulin sensitivity, activation of peroxisome proliferator-activated receptors, and over-expression of mitochondrial uncoupling proteins. The key features of this diet are reduced calorie density and reduced cholesterol intake. The combination of these two factors is the essence of the efficiency of this approach to weight control. Our data suggest that plant-based/vegan diets might play a significant role in future strategies for reducing body weight.

26 December 2021 in Plants
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Velislava TodorovaVelislava Todorova
Velislava Todorova
KIKalin Valentinov Ivanov
Kalin Valentinov Ivanov
Stanislava IvanovaStanislava Ivanova
Stanislava Ivanova
Background: In the 1960s, research into plant adaptogens began. Plants with adaptogenic properties have rich phytochemical compositions and have been used by humanity since ancient times. However, it is not still clear whether the adaptogenic properties are because of specific compounds or because of the whole plant extracts. The aim of this review is to compare the bioactive compounds in the different parts of these plants. Methods: The search strategy was based on studies related to the isolation of bioactive compounds from Rhaponticum carthamoides, Lepidium meyenii, Eleutherococcus senticosus, and Panax ginseng. The Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines were followed. Results: This review includes data from 259 articles. The phytochemicals isolated from Rhaponticum carthamoides, Lepidium meyenii, Eleutherococcus senticosus, and Panax ginseng were described and classified in several categories. Conclusions: Plant species have always played an important role in drug discovery because their effectiveness is based on the hundreds of years of experience with folk medicine in different nations. In our view, there is great potential in the near future for some of the phytochemicals found in these plants species to become pharmaceutical agents.

13 November 2024 in Molecules
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SPStela Pashova
Stela Pashova
Diana Karcheva-BahchevanskaDiana Karcheva-Bahchevanska
Diana Karcheva-Bahchevanska
KIKalin Valentinov Ivanov
Kalin Valentinov Ivanov
Stanislava IvanovaStanislava Ivanova
Stanislava Ivanova
The genus Stachys represents one of the most extensive genera within the subfamily Lamioideae and ranks as one of the largest genera in the Lamiaceae family. Many Stachys species are associated with a rich history in traditional medicine across various cultures, and their extracts and essential oils are rich in non-volatile and volatile compounds. Because of their complex profile of bioactive substances, Stachys members are considered to possess an extensive spectrum of therapeutic properties, including antioxidant, anti-inflammatory, analgesic, antibacterial, cytotoxic, and wound-healing effects, as well as benefits for memory enhancement, lipid profile regulation, blood glucose control, and weight management. Despite the wide distribution and chemical diversity of the genus, studies on its biological activities remain limited. The aim of this review is to summarize the most relevant data from studies on the bioactive compounds, traditional uses, and pharmacological properties of Stachys species found in databases such as Science Direct, PubMed, and Scopus. Specific keywords were used in the search strategy, including “bioactive compounds”, “Stachys”, “Lamiaceae”, “Stachys extract”, “Stachys essential oil”, “traditional uses”, “chemical composition”, “therapeutic potential”, “clinical trials”, “in vivo studies”, “in vitro studies”. The search strategy was performed according to the guidelines for Preferred Reporting Items for Systematic Reviews and Meta-Analyses. Data from 171 studies were included. The manuscript highlights the drug-discovery potential of Stachys species, emphasizing their potential applications in medicine, cosmetics, dietary supplements, and the food industry. Moreover, it provides important data that could assist Stachys research programs.

18 February 2022 in Processes
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Stanislava IvanovaStanislava Ivanova
Stanislava Ivanova
Velislava TodorovaVelislava Todorova
Velislava Todorova
SDStanislav Dyankov
Stanislav Dyankov
KIKalin Valentinov Ivanov
Kalin Valentinov Ivanov
Background: High-performance thin-layer chromatography (HPTLC) is an advantageous, modern analytical technique based on the principles of thin-layer chromatography (TLC), which provides essential benefits, such as improved sample application, better and faster separation, and less mobile phase usage. The aim of this work was to develop a simple and rapid HPTLC method that could be used for the identification of meloxicam and piroxicam. Methods: HPTLC. The analysis was carried out using silica gel 60 F254 glass TLC plates and as the mobile phase: hexane: ethyl acetate: glacial acetic acid, in a ratio of 65:30:5 v/v/v. For the standard solution preparation, ethanol was used. Front: 60 mm. Detection was performed at 366 nm. Results: The Rf value for meloxicam was 0.81 and the Rf value for piroxicam was 0.57. The proposed method can be used in the detection of the analyzed compounds in very low concentrations. It was established that the detection limit of meloxicam was 0.04 μg per band and that of piroxicam was 0.05 μg per band. It was also established that the quantitation limit of meloxicam was 0.12 μg per band and that of piroxicam was 0.15 μg per band. Conclusions: The proposed method is simple, sensitive, stable, cost effective, and eco-friendly. It could be used in research or for routine quality control purposes.