Jan Brindza

• Slovak University of Agriculture in Nitra

Brassica oleracea (cabbage) is a widely consumed cruciferous vegetable known for its nutritional richness and health-promoting properties. This study aimed to evaluate the mineral composition, total polyphenol content (TPC), antioxidant activity (AA), and the presence of potentially toxic elements in selected cabbage varieties. Total polyphenol con...

Swiss chard (Beta vulgaris L. subsp. cicla) is a nutritionally rich leafy vegetable valued for its high bioactive compounds and essential mineral content. This study aimed to evaluate the total polyphenol content (TPC), antioxidant activity (AA), macro- and microelement concentrations, and the presence of selected risk elements (lead and cadmium) i...

This study aimed to test the antioxidant parameters of the flower and fruit ethanol extracts of 15 genotypes of Asimina triloba (L.) Dunal. (AzTr-01 – AzTr-15) collected in the M.M. Gryshko National Botanical Garden (Kyiv, Ukraine). Antioxidant activity of the extracts of the investigated genotypes was measured with free radical scavenging activity...

Black chokeberry (Aronia melanocarpa L.) attracts scientific interest due to its high content of bioactive compounds with beneficial effects on human health. Presented work aimed to determine the total polyphenol content (TPC), total anthocyanin content (TAC), and antioxidant activity by methods ABTS, DPPH, FRAP of black chokeberry (Aronia melanoca...

Cherries are highly valued not only for their appealing taste and nutritional benefits but also for their rich profile of phenolic compounds, which contribute significantly to their potential health-promoting properties. Apart from these beneficial substances, cherries may also accumulate traces of heavy metals, which raises important concerns as t...

The increasing interest in spicy plants for their diverse applications in functional foods and as melliferous plants highlight a wide array of species valued for their distinctive flavours, nutritional benefits, and therapeutic properties. Dracocephalum moldavica L., commonly known as Moldavian dragonhead, is a noteworthy candidate due to its nutri...

Strawberry (Fragaria vesca L.) plays a valuable role in human nutrition due to its richness in minerals, vitamins, antioxidants, flavonoids, anthocyanins, and other bioactive compounds that benefit the human body. This study focused on assessing the total polyphenol content (TPC) and antioxidant activity (AA) using UV-Vis spectrophotometry, and lev...

This work reviewed the dynamics of changes in the state of walnut fruits (Juglans regia L.) and American pokeweed berries (Phytolacca americana L.) from the point of view of the thermodynamic laws of biological systems. The development of fruits/berries, accompanied by the exchange of substances and energy with the external environment, and the pri...

The purpose of this research was to study the effect of Juniperus sabina extract, a natural substance of mineral origin Alginite and bioregulators genistifolioside and Moldstim on the germination kinetics of beech seeds of Roznava (Slovakia) origin. The gibberellic acid served as standard plant growth regulator. Seed viability, determined by two ex...

The aim of the work. In this study, the total phenolic content (TPC) and composition of volatile compounds in the seeds of the newly developed cultivar 'Rizdviana zirochka' of Nigella damascena L. (love-in-a-mist) were analyzed. The morphometric characteristics of these seeds were also evaluated. Materials and Methods. The gas chromatography-mass s...

This study aimed to analyze the compositions of flavonoids and phenolic acids in the aerial parts of two Artemisia L. species (Artemisia ludoviciana Nutt. and Artemisia campestris L.) when grown in Ukraine. High-performance liquid chromatography analysis (HPLC) detected the presence of 11 flavonoids and 10 phenolic acids in the plant materials unde...

The purpose of our work was to study the emerging of Fagus sylvatica seedlings of “Plaiul Fagului” origin under the influence of bioregulators and adaptation beech plants in the natural conditions. Seeds of F. sylvatica were collected in October 2023 on the territory of the “Plaiul Fagului” Natural Reserve, Ungheni district, Radenii Vechi commune,...

The purpose of our work was to study the emerging of Fagus sylvatica seedlings of “Plaiul Fagului” origin under the influence of bioregulators and adaptation beech plants in the natural conditions. Seeds of F. sylvatica were collected in October 2023 on the territory of the “Plaiul Fagului” Natural Reserve, Ungheni district, Radenii Vechi commune,...

Thermotherapy for seeds of European beech (Fagus sylvatica L.) is recommended as an effective method to eliminate or reduce pathogens and pests, especially before long-term storage of seeds. In this investigation, we studied the influence of moderate temperatures, as well as the influence of bioregulators on the viability and germination of beech s...

Echinacea Moench species (Asteraceae Bercht. & J. Presl) are one of the most known medicinal and ornamental plants with numerous pharmacological activities. The objects of this study were plant raw materials of Echinacea angustifolia DC. (Kherson Oblast, Ukraine) and E. purpurea (L.) Moench (Kherson and Poltava Oblast, Ukraine) was collected at the...

Many growers and family farmers in the countryside still conserved original and culinary important old and local crop varieties. These varieties are the basis of the food security of the rural population. Under the conditions of Slovakia, the common bean (Phaseolus vulgaris L.) has always been an important legume crop, evidenced by the hundreds of...

The tree-of-heaven plant, due to the content of secondary metabolites with a variety of unique properties, is widely studied as a potential raw material for obtaining remedies for organic farming. Our work aimed to study the allelopathic effect of Ailanthus altissima extracts on tomato (Lycopersicon esculentum) seeds. Dry plant materials of ailanth...

This study aimed to evaluate the mineral content, and content of bioactive compounds in fruits of Cornelian cherry (Cornus mas L.). Neochlorogenic acid, chlorogenic acid, caffeic acid, and rutin were determined in the samples. Vitamin C content ranged from 610.36 to 1344 mg kg⁻¹ FW. Content of K, Ca, P, Mg, and Na in samples ranged from 1750.8 to 2...

The success of artificial beech reforestation depends on the quality of planting material. Therefore, the purpose of our work was to study the reproductive capacity of beech seeds collected in the Natural Reserve “Plaiul Fagului” and the possibility of increasing it with the application of natural bioregulators. The viability of freshly harvested s...

This study aimed to evaluate the antioxidant potential of ethanol extracts of Nigella L. species from the Kherson Oblast of Ukraine. The extracts of seeds and above-ground parts of N. damascena L., N. hispanica L., N. orientalis L., and N. sativa L. cv. Diana were used to determine the total phenolic content (TPC), total flavonoid content (TFC), to...

The aim of the monography is presentation of pollen grain characteristics from selected group of plant species. The evaluated group consists of plants that are traditionally cultivated such asHelianthus annuus L., Prunus avium (L.) L.; rarely used such as Castanea sativa Mill., Aronia melanocarpa (Michx.) Elliott; less known species Diospyros kaki...

Nowadays, especially important is the introduction of new plants into cultivation in connection with global climate change. Acclimatization of new fruit plants in Ukraine contributes to an increase in the biodiversity of flora. Castanea sativa Mill. (sweet chestnut) fruits belong to underutilized fruit plants of the forest-steppe of Ukraine, as a p...

The results of seasonal variation of total polyphenols (TPC), flavonoids (TFC) and phenolic acid (TPAC) accumulation and antioxidant activity of Artemisia balchanorum Krasch. × Artemisia taurica Willd. genotypes from the Kherson Oblast of Ukraine represented in this study. The total polyphenol content was identified by the Folin-Ciocalteu method an...

This review aims to analyze Mentha piperita L. as a potential raw material for the development of new health-promoting products (nutraceuticals, cosmetics, and pharmaceutical products). A lot of scientific publications were retrieved from the Scopus, PubMed, and Google Scholar databases which enable the study and generalization of the extraction pr...

An herbal supplement made with thyme, mint, cilantro, and rowan and viburnum fruit has been used to fortify wheat bread with antioxidants. The antioxidant activity of raw materials and bread was determined by the spectrophotometric method. To determine substances with antioxidant properties, the HPLC method was used. The chromatogram of the alcohol...

The interest in natural products, namely, bee products is actual nowadays. The Bee pollen is a rich source of nutrients and biologically active compounds with numerous biological activities such as antioxidant, antimicrobial, anticancer, anti-inflammatory, etc. The search for new plant raw as a source of natural products has a practical meaning. Th...

The morphological variability of the male and female flowers of 23 date plum (Diospyros lotus L.) genotypes found together at date plum collection in Arboretum Mlynany (Slovak Republic) was investigated. The collection consists of seed-propagated genotypes, which were established in 1970 with introduced seeds from different countries. Results showe...

The influence of the culture medium without bacterial cells, obtained after the cultivation of endophytic bacteria Priestia endophytica UCM B-5715, on the growth and synthesis of some metabolites in lettuce and chicory seedlings under in vitro conditions was studied. Bacteria were cultivated in liquid LB medium at 37 ºC for 24 h with periodic stirr...

In the current study, Cornelian cherry powder (CCP, Cornus mas) was investigated as a functional ingredient for bread production. Experimental bread loaves were prepared using five levels of CCP (0, 1, 2, 5, and 10% w/w) to replace wheat flour in bread formulation. The final products were analyzed regarding their proximate composition, content of s...

Sea buckthorn (Hippophae rhamnoides L.) is described by various beneficial effects as it contains several bioactive substances characterized by antioxidant effects. These effects are closely related to the reduction of oxidative stress that is involved in the development of the disease. One such diseases is Diabetes mellitus, the prevalence of whic...

Aim. The aim of the study was to develop the methodical approach to determine the antioxidant activity of the tinctures of Monarda fistulosa herb and flowers and roots of Echinacea purpurea, as well as to develop their technology in laboratory conditions. Materials and Methods. The following methods were used: analysis, synthesis, systematization,...

The research focused on determining the economic value of a selected collection of 20 shrubs from a wild-growing population of Mahonia aquifolium (Pursh) Nutt. from Arboretum Mlyňany and Nitra region. By morphological analysis, we determined weight of fruits 0.18-0.50 g, the height of fruits 5.57-13.22 mm, the width of fruits 0.98-11.00 mm, and the...

This article reveals the international experience on the positive effects of bee pollen and bee bread on the human body. The properties of bee pollen of different botanical type are insufficiently studied, which may have limitations on their use.

The article describes the main approaches to the selection of foods for diet therapy. Mandatory rules of primary processing of food products (meat, fish, eggs) for diet therapy are described.

The article presents thermal methods of food processing. Properly selected method of heat treatment of quality food is the key to the effectiveness of therapeutic nutrition. Preference is given to steaming, water bath and stewing.

The article substantiates the use of beekeeping products from ancient times to the present. The use of apiproducts for the prevention and treatment of various human diseases has been comprehensively studied in terms of beekeeping, botany, chemistry, microbiology, pharmacy and medicine.

Beech seeds are characterized by a strong exogenous and deep physiological dormancy. They need a long period of stratification, but even through stratification, seed germination is greatly extended in time. The aim of this study was to accelerate the seeds germination and improve the resistance of seedling by application of different growth regulat...

This scientific work was aimed to evaluate the antioxidant potential of aromatic plants of Thymus spp. in the East of Ukraine. These plants are known as medicinal and food around the world. All antioxidant parameters were investigated spectrophotometrically: total content of polyphenols (TPC), the total content of phenolic acids (TPAC), the total c...

Within the framework of the Convention on the Conservation of Biodiversity and the implementation of the program “Agrobiodiversity for the improvement of nutrition, health and quality of life” by joint research of the Department of Acclimatization of Fruit Plants of the M. M. Gryshko National Botanical Garden of the National Academy of Sciences of...

It is known that a polymorphic population consisting of a large number of genotypes adapts more rapidly to the environment conditions. The availability of a large gene pool predetermines the success of the introduction and further breeding of new cultivars with economically valuable features. Morphometrics is a classical tool for studying the ampli...

The DPPH assay provides an easy and rapid way to evaluate the antioxidant activity of herbal preparations. The most important stage of the elaboration of the analytical procedure of total antioxidant activity measured by the DPPH test is to select the volume of an extract or its appropriate dilution for the determination of the reliable total antio...

Due to the rise in ambient temperature, it is important to conduct researches on the interconnection between the plant diversity of ecosystems and their pollinators – the honey bees. The purpose of our researches was related to the adaptability of bees to high ambient temperatures. The task of the research was to investigate the effect of high te...

The pellicles, which cover the walnut kernels, protect the lipids from the kernel's endosperm against the oxidative degradation. In previous studies, we showed that for the formation of the bad brown colour and bitter taste of walnut kernels, the oxidized polyphenols (naphthoquinones) are responsible. It is necessary to mention that the ratio betwe...

Allium vegetables belong to the most widespread and commonly grown vegetables in Slovakia. In this study, we dealt with the content of selected heavy metals (Zn, Mn, Cr, Cu, Ni, Pb, and Cd) in cultivated garlic (Záhorský, Lukan, Makoi), onion (Amika, Red Matte, Diamant), and leek (Bavaria, Golem, Tango). We determined the total content of heavy met...

У тезах ідеться про передумови створення, цілі, завдання та результати реалізації міжнародного проєкту «SAVE BEES. Save endangered bees to improve nutrition, health and quality of life». Проєкт було реалізовано впродовж 2019-2020 років за участі 13 країн. Основною метою проєкту було: створити інтелектуальний та інституційний потенціал міжнародної п...

Applied two preparations of alginite formed from natural bituminous rock alginite in 4 different variants into the soil (granular forms) and spraying on leaves (extracts) in 2 cultivars of Solanum lycoper-sicum L. resulted in reduced production traits on plants and fruits, increased or decreased accumulation of macro and microelements content in pl...

Echinocystis lobata (Mich.) Torr. et Gray extracts were investigated for their bioactive compounds and their potential for natural antioxidant properties. In vitro antioxidant activity of methanol, ethanol, and water extracts were evaluated by 1,1-diphenyl-picrylhydrazyl (DPPH) radical scavenging activity. Total phenolic content (TPC) and total fl...

Plant extracts and essential oils from 200 species of 50 plant families was tested as phytopesticides on insect-acaricidal, ovicidal and deterrent-repellent properties against various groups of insects and mites. Due to the variety of secondary metabolites, the largest number of phytopesticides was found among the plants of Apiaceae family. It was...

Capsicum chili peppers are popular vegetables in Slovakia. They provide a supply of health-promoting substances, but contaminated vegetables can pose a serious health risk to the people who consume them. Therefore, the aim of this study was to determine the content of heavy metals (Mn, Zn, Cr, Cu, Ni, Cd, Pb and Hg) in the soil as well as in select...

Цель наших исследований состояла в изучении инсектицидных и антифидантных свойств ряда эфирных масел из растений сем. Lamiaceae и Apiacea по отношению к гусеницам Galleria mellonella.

Bee pollen samples were discriminated using vibrational spectroscopic methods by connecting with botanical sources, composition, and color. SEM and light microscope images of bee pollen loads were obtained and used to assess the botanical origin. Fourier transform (FT) mid- and near-infrared (FT-MIR, FT-NIR), and FT-Raman spectra of bee pollen samp...

Natural dyes from pokeweed berries were stable during the 6-12 months of storage at -12°C. The decrease in the antioxidant potential of stored berries was conditioned by chemical constituents different from the betacyanin - betaxanthin complex.

The publication aims to present some knowledge about the less-known but at the same time very scarce bituminous rock alginite with comprehensive practical use in the form of a brief overview. Alginite is an organic-bituminous rock that was formed about six million years ago from dead fossil algae Botryococcus braunii Kütz and diatoms in the area of...

An international team of scientists continues to study the resource potential of non-conventional or little-utilized plants. Pawpaw (Asimina triloba (L.) Dunal) fruit (pulp and peel) and seeds were analyzed for their nutritional compositions. Seeds exhibited significantly higher levels of crude protein, lipid, and vitamin E (11.82 %, 34.0 %, and 20...

Pseudocydonia sinensis (Thouin) C. K. Schneid. less known plant species in the Ukraine conditions, but the fruits were widely used in traditional Chinese medicine for the treatment of asthma, colds, sore throat, mastitis, rheumatoid arthritis, and tuberculosis. The content of protein, ash, and lipids in the seeds was found to be greater than in the...

We have investigated different ways of bees’ stimulation to lay protein food while using artificial honeycombs. It has been proved that the use of artificial combs to get bee-bread upon the condition of the post-treatment processing of its elements by wax and honey syrup does not stimulate bees to lay and process protein food in their cells. It has...

Lavender honey was studied for physicochemical and organoleptic parameters. Established high antioxidant activity of lavender honey. This confirms the prospect of using lavender honey in the food and pharmaceutical industries.

Dvykaliuk, R. M., Adamchuk, L. O., & Brindza, J. (2021). The place of propolıs ın packagıng materıals trends. Scientific achievements in solving current problems of production and processing of raw materials, standardization and food safety: Abstract Book of the X International Scientific and Practical Conference (Kyiv, April 22-23, 2021), 151-152.

Background. The search for new plant raw material as a potential source of antioxidants is still ongoing. This study aimed to evaluate the antioxidant and antimicrobial capacity of the plant raw material of Crambe spp. during vegetation. Materials and methods. The free radical scavenging activity and molybdenum reducing power of the extracts were u...

Background: The search for new plant raw material as a potential source of antioxidants is still ongoing. This study aimed to evaluate the antioxidant and antimicrobial capacity of the plant raw material of Crambe spp. during vegetation. Methods: The free radical scavenging activity and molybdenum reducing power of the extracts were used to dete...

Background: Economically important vegetables are a strong source of antioxidants with different characteristics. Capsicum L. (pepper) is an important agricultural plant because of its economical, medicinal, and nutritional values. Methods: This study aimed to test antioxidant parameters in the fruits of 9 cultivars of Capsicum annuum L. (CA 01-...

A comparative analysis of the seeds ash composition of the breed Rif (Brassica napus L.) rapeseeds grown in the Lipetskaya region was held. The plants were grown in the conditions of the agroecological experiment using mineral (NPK and zeolite) and organic (hen droppings) fertilizers. 6 variants of the experiment were studied – the plants are grown...

Honey as a multi-component substance made by honey bees is a carbohydrate source and contains flavonoid compounds that act as antioxidants and may have ergogenic properties. As an ancient activity in Ukraine, using honey in the production of honey drinks has a long and varied history. Despite its very long tradition, only a few honey drink recipes...

Pseudocydonia sinensis (Thouin) C.K. Schneid. less known plant species in the Ukraine conditions, but the fruits were widely used in traditional Chinese medicine for the treatment of asthma, colds, sore throat, mastitis, rheumatoid arthritis, and tuberculosis. In this study, chemical compositions of the leaves of Pseudocydonia sinensis were investi...

Old and landraces varieties of cultivated plant species selected from natural populations adapted to long-term cultivation, which represent a rich genetic potential for the development of agroecosystems and agriculture under specific conditions, resources for an environment aestheticization, landscaping and development of cultural traditions. The r...

American pokeweed (Phytolacca americana L.) is a good ornamental plant due to its ability to grow rapidly, broad and tall vegetation, and attractive grape-like fruits. However, American pokeweed and some useful chemical constituents, which accumulate in different parts of this plant, until present, in our opinion, are not utilised sufficient effect...

American pokeweed (Phytolacca americana L.) is a good ornamental plant due to its ability to grow rapidly, broad and tall vegetation, and attractive grape-like fruits. However, american pokeweed and some useful chemical constituents, which accumulate in different parts of this plant, until present, in our opinion, are not utilised sufficient effect...

In the summer of 2020 on the plantations of Phytolacca americana L. (pokeberry) growing in the central zone of the Republic of Moldova, a new, economically dangerous pest species was discovered, known as the southern green stink bug or southern vegetable bug-Nezara viridula L. (Heteroptera: Pentatomidae). At both stages of bug development, larvae a...

Solidago canadensis L. was introduced to Europe as an ornamental plant from North America in 1645 and began to spread during the XIX-XX centuries. Nowadays the species is considered the most aggressive invasive species. On the other hand, S. canadensis is considered to be a medicinal plant. The raw material known as Herba Solidaginis includes herbs...

A promising way to increase the use of buckwheat is the wider introduction of technologies for its processing, including grinding of non-hulled grain. It requires the search for new plant materials with more suitable characteristics. In this work, the possibilities to use the grain of a new artificial buckwheat species Fagopyrum hybridum for flour...

The aim of the research is the determination of the total antioxidant activity and the content of phenolic compounds of the leaves of 12 species of non-traditional plants, namely, Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem., Aronia mitschurinii A.K. Skvortsov & Maitul., Castanea sativa Mill., Chaenomeles japonica (Thunb.) Lindl., Cornus mas L.,...

Background: Sea buckthorn is a good and possible source of a wide range of bioactive compounds with a positive effect on the human body, especially polyphenols and carotenoids. Methods: The present study aimed to evaluate the antioxidant and antimicrobial activities of Hippophae rhamnoides L. products - 100% oil, 100% juice, dry berries, and tea...

Chokeberry (Aronia Medik.) is a non-traditional fruit plant known as a rich source of biologically active compounds and inhibits the numerous biological activities. We compared the antioxidant activity and phenolic compounds of fruits between widely cultivated Aronia mitschurinii (AM-TCH, from Tchekhov district; AM-D, from Dmitrov district; AM-OZ,...

The risk of type 2 Diabetes mellitus is constantly increasing and therefore it is necessary to seek effective and new therapies. Cornelian cherry (Cornus mas L.) presents an opportunity in an alternative for treatment of type 2 Diabetes mellitus due its high antioxidant effects. The objective of the study was to assess the effect of Cornelian cherr...

Owing to a limited body of information on perga properties in the literature, the compressive properties of perga were determined in this study using uniaxial compressive tests. Certain mechanical properties such as the failure stress and strain and the modulus of elasticity can be used to evaluate the mechanical behavior of buckwheat (Fagopyrum es...

Bacteria, yeasts and microscopic fungi, which are live and grow normally on the grape surfaces, are important for winemaking. The aim of this study was to investigate the microbiota of the Tokaj wines grapes of Slovak origin. The total bacterial count ranged from 2.48 log cfu/g to 4.52 log cfu/g. Malt Extract Agar (MEA) with acid base indicator bro...

The purpose of the work was to apply of the DPPH stable chromogen radical method for determining the antioxidant activity of beekeeping products. Product samples were selected in view of botanical origin of bee colonies in different regions of Ukraine. The antioxidant activity was determined by a spectrophotometric method with a stable DPPH chromog...

The aim of our research was to establish morphological and spectrometric characteristics, the content of phenolic compounds and the antioxidant activity of P. rhoeas bee pollen. Samples of monofloral and polyfloral bee pollen were collected in districts of the Kiev region (Ukraine) in the summer period of 2016 with the help of hinged pollen traps....