Albena Stoyanova's research while affiliated with University Of Food Technology - Plovdiv and other places
What is this page?
This page lists the scientific contributions of an author, who either does not have a ResearchGate profile, or has not yet added these contributions to their profile.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
It was automatically created by ResearchGate to create a record of this author's body of work. We create such pages to advance our goal of creating and maintaining the most comprehensive scientific repository possible. In doing so, we process publicly available (personal) data relating to the author as a member of the scientific community.
If you're a ResearchGate member, you can follow this page to keep up with this author's work.
If you are this author, and you don't want us to display this page anymore, please let us know.
Publications (177)
Introduction
Centranthus kellereri is a Bulgarian endemic plant species, found only in two locations in the world: The Balkans Mountains (Stara Planina), above the town of Vratsa, and The Pirin Mountains, above the town of Bansko, Bulgaria. Being endemic and endangered species precluded any significant research on it. The hypothesis of this study w...
In today's dynamic world, it is necessary to explore more alternative options for starch isolation and develop technologies to obtain better quality products. The presence of impurities in the composition of starch is an indicator that affects its properties. Starch was isolated from whole emmer seeds. The present study aims to compare the protein...
Flaxseed oil is a prevalent food supplement. On one hand, vegetable oil is used in the food industry and pharmacy due to its health benefits; on the other hand, it has an application as a lubricant oil. The fatty acid composition of the investigated oil was determined as follows: the main fatty acids were α-linolenic (57.5%), oleic (17.5%), linolei...
Fennel (Foeniculum officinale Mill. var. dulce Mill) is an annual aromatic plant of the Lamiaceae family. Its fruits are processed to obtain essential oil for use in the food industry and cosmetics. The physical parameters of the fruits, i.e. length (5.50-8.00 mm), width (1.50-2.00 mm), volume of 100 fruits (1.36 × 10-6 m3), density of 100 fruits (...
The aim of the present paper was to study and present a comparative analysis of the antibacterial activity and physicochemical properties of commercial mint essential oils from two different species-peppermint (Mentha piperita Huds. (L.)) and cornmint (Mentha arvensis L.). Peppermint oils exhibited weak antibacterial activity, but were more pronoun...
Carvacrol is a major component of many essential oils of the genus Thymus, Satureja, and Origanum, determining their antimicrobial, antioxidant, and other properties. The aim of the present study was to investigate some physicochemical and biological properties of pure carvacrol. The surface tension and density were measured at six different temper...
The genus Nepeta, belonging to the family Lamiaceae, includes about 300 species, most of which are used in folk medicine due to their pronounced biological properties. The aim of the present study was to evaluate the agrobiological characteristics of Nepeta transcaucasica (N. transcaucasica) Grossh. and Nepeta cataria (N. cataria) L., cultivated in...
Summer savory (Satureja hortensis L.) is a plant source of essential oil belonging to the Lamiaceae family, widely used in the food industry. The present work aims to determine the physicochemical parameters of food emulsions containing the essential oil. The summer savory essential oil with main components carvacrol (63.71%), γ-terpinene (20.47%),...
Lemon balm (Melissa officinalis L.) is a perennial plant of the family Lamiaceae, which is used in folk medicine and the food industry, as well as being processed to obtain essential oil. The aim of the special work is to monitor the influence of vegetation on the composition of the essential oil. The chemical composition of essential oils, obtaine...
During the processing of fennel fruits (Foeniculum vulgare Mill.) for obtaining essential and vegetable oils, biomass is released. It is mainly used as an additive for feeding or as an organic fertilizer. The aim of this research is to investigate the possibilities of using biomass obtained during the processing of fruits from harvest 2020 and 2021...
Hypericum species and especially H. perforatum L. are well known for their therapeutic applications. The present study assessed the essential oil (EO) composition, and antifungal and aphid suppression activity of seven Bulgarian Hypericum species. The EOs were analyzed by GC-MS-FID. Two experiments were conducted. In the first experiment, H. perfor...
The aim of the present study was to determine the antimicrobial activity and some physicochemical parameters of the essential oil of spearmint (Mentha spicata L.) and its main component L-carvone. It was found that the essential oil did not exhibit antimicrobial activity against the tested test cultures. At the same time, L-carvone was most active...
Marrubium friwaldskyanum Boiss (Lamiaceae) is a Bulgarian endemic species. Overall, the essential oil (EO) composition of M. friwaldskyanum was different from that of the other Marrubium species reported in the literature. The main EO constituents of M. friwaldskyanum were (E)-caryophyllene, germacrene D, and caryophyllene oxide. The effect of the...
Physalis alkekengi L. (Solanaceae) is encountered in different regions of Bulgaria as a wild growing or ornamental plant. The objective of this work was to characterize the phytochemical composition (macro and micro components) of the leaves and stems of two local phenotypes (PA-SB and PA-NB), with the view of revealing their use potential. The dry...
Apart from the main aroma products, the lavender essential oil industry generates huge quantities of undervalorized biomass, which was discarded nearby to the distilleries or used as a fertilizer. Therefore, the current study was performed to explore the hypothesis that the lavender waste biomass could be additionally utilized as a source of polysa...
In recent years there has been an extensive search for nature-based products with functional potential. All structural parts of Physalis alkekengi (bladder cherry), including fruits, pulp, and less-explored parts, such as seeds and peel, can be considered sources of functional macro- and micronutrients, bioactive compounds, such as vitamins, minera...
Different investigations at Clary sage (Salvia
sclarea L.) essential oil were presented. Antioxidant properties
of the oil were evaluated by four different methods – DPPH,
ABTS, FRAP, and CUPRAC. The oxidative stability of clary
sage essential oil was provided at two temperatures 6 and
25°C. Using the Arrhenius equation the rate constant of the
oxi...
Mediterranean sage (Salvia aethiopis L.) is a common species in Turkey belonging to the family Lamiaceae. It could be used for various medicinal purposes as an ointment, for treating multiple diseases, etc. Mediterranean sage was collected from the campus area of Yozgat Bozok University Erdoğan Akdağ in June 2017. The essential oil was isolated fro...
Physalis alkekengi L. is the only representative of the genus Physalis (Solanaceae) that is native to Bulgaria, found in wild habitats under different climatic and soil conditions. The plant is poisonous, but produces edible fruit, which are a source of functional nutrients—vitamins, phenolic antioxidants, minerals, etc. Therefore, the objective of...
Citation: Zhelev, I.; Petkova, Z.; Kostova, I.; Damyanova, S.; Stoyanova, A.; Dimitrova-Dyulgerova, I.; Antova, G.; Ercisli, S.; Assouguem, A.; Kara, M.; et al. Chemical Composition and Antimicrobial Activity of Essential Oil of Fruits from Vitex agnus-castus L., Growing in Two Regions in Bulgaria. Plants 2022, 11, 896.
Nowadays, the requirements of new sources of natural food components are constantly expanding worldwide. On one hand, the constituents derived from the common agriculture plants satisfy the needs of the body to function properly. On the other hand, the price of producing ordinary foods is gradually increasing. For that reason, it is necessary to fi...
The emulsion stability of different pumpkin O/W emulsions was investigated. Preparation of emulsions were performed with oil phase between 10 and 40 percent, water and soybean protein isolate. To determine emulsion properties different methods were used. Density, viscosity, centrifugation tests and spectroscopic measurements were performed for thei...
The seeds of Cape gooseberry ( Physalis peruviana L.) remain as a by-product from juice production, but they can also be a potential resource of valuable nutrients. The objective of this study was to analyze the phytonutrient composition of the seeds isolated from fruit at two maturity stages unsuitable for regular realization (unripe and under-rip...
The present paper aims to investigate the chemical composition of unripe black pine seeds obtained from Bulgaria. The lipid fraction was evaluated in unripe seeds, and the cellulose, total carbohydrates, glucose, fructose, and sucrose were evaluated in seedcakes. The major fatty acid identified in the Pinus nigra seed oil was unsaturated linoleic a...
Koelreuteria paniculata Laxm. is used in traditional medicine and has various established biological activities, however, the species is considered to be a potentially invasive alien tree species for Bulgarian flora. However, there is still much to be studied about the phytochemical and biological characteristics of the species. The present study a...
The aim of the present study was to investigate the possibilities for obtaining pellets by single-screw extrusion of black pine (Pinus nigra Arn.) biomass. Two fractions of black pine needles-1) with dp ≥ 500 μm and bulk density ρn = 0.243 g/cm 3 and 2) black pine twigs with d ≥ 500 μm and ρn = 0.297 g/cm 3 , were obtained. Wheat bran with dp ≥ 500...
This study aimed to identify the chemical composition (ash, cellulose, total chlorophylls, carotenoid, and essential oil (EO) content), antioxidant activity, and mineral composition of the lemon balm (Melissa officinalis L) obtained from Bulgaria. The chemical composition of the EO was analyzed using gas chromatography-mass spectrometry (GC-MS). Th...
Cape gooseberry (Physalis peruviana L.) is a South American fruit with high nutrient
content, pleasant taste and antioxidant properties. However, its consumption in some
countries is underеvalued. The aim of this study was to determine the nutritional
composition of two genotypes of Cape gooseberry fruit produced in Bulgaria (CG-F and
CG-P) and to...
The thermodynamic and physicochemical properties of lavender oil (Lavandula angustifolia Mill.)-ethanol-water system were measured. The chemical composition of solutions of the lavender oil in 70%, 75%, 80%, 85%, 90%, and 95% ethanol was determined using GC/MS analysis. The main compounds in the solutions are oxygenated monoterpenes (-linalool, te...
![Thermo physical parameters of the main compounds [19]](profile/Stanislava-Tasheva/publication/353210010/figure/tbl3/AS:1044970895052800@1626151884229/Thermo-physical-parameters-of-the-main-compounds-19_Q320.jpg)
The some physochemical and chemical properties of the clary sage (Salvia sclarea L.) essential oil were determined. The main constituents in the clary sage essential oil (above 2%) were: linalyl acetate (34.62%), -linalool (17.67%), -muurolene (8.27%), -caryophyllene (5.60%), -ylangene (5.18%), -terpineol (4.84%), n-docosane (3.00%), and neryl...
![Thermo physical parameters of the main compounds [19]](publication/353192928/figure/tbl3/AS:1044767416786944@1626103371021/Thermo-physical-parameters-of-the-main-compounds-19_Q320.jpg)
The some physochemical and chemical properties of the clary sage ( Salvia sclarea L.) essential oil were determined. The main constituents in the clary sage essential oil (above 2%) were: linalyl acetate (34.62%), β -linalool (17.67%), α -muurolene (8.27%), β -caryophyllene (5.60%), α -ylangene (5.18%), α -terpineol (4.84%), n-docosane (3.00%), and...
The thermodynamic and physicochemical properties of lavender oil ( Lavandula angustifolia Mill.)-ethanol-water system were measured. The chemical composition of solutions of the lavender oil in 70%, 75%, 80%, 85%, 90%, and 95% ethanol was determined using GC/MS analysis. The main compounds in the solutions are oxygenated monoterpenes ( β -linalool,...
Juniperus excelsa M. Bieb and J. sabina L. contain essential oil (EO), while J. sabina also contains podophyllotoxin, which is used as a precursor for anti-cancer drugs. Two studies were conducted. The first assessed the variability in the EO profile and podophyllotoxin concentration of the two junipers, depending on the location and tree gender. T...
The aim of this study was to determine the characteristics of a biomass, obtained after hydro-distillation of different parts of Pinus nigra Arn., growing in Bulgaria, due to revealing potential use in the production of pellets. The biomass, comprised of needles and needles with twigs, was milled and subjected to sieve analysis, thus producing thre...
Volatiles from aerial parts of Koelreuteria paniculata Laxm. have been isolated by hydrodistillation
for the first time and they were identified by GC/MS analysis. The yield of essential oils was 0.035 %,
0.021 %, 0.018 %, 0.011 % in the flower buds, flowers, leaves and stem bark, respectively. The main essential oil
constituents of the flower buds...
The aim of the present study was to determine the thermodynamic and kinetic parameters of biomass obtained from black pine ( Pinus nigra Arn.). The biomass, consisting of twigs with needles and needles alone of black pine, was used. Ultimate analysis with the elemental composition of the biomass with respect to the main components such as carbon (C...
Comprehensive chemical profiling of threeRosa damascena Mill. essential oil samples and two extracts (supercritical and subcritical) was performed by means of GC/MS/FID. As a result 85 compounds, representing 87.9-99.2% of the detected compounds, were identified by GC/MS and simultaneously quantified by GC-FID.The main aroma constituents in the ess...
Physalis peruviana L. fruit (Cape gooseberry, CG) is a rich source of phytonutrients, including vitamins, minerals, polyphenols, polyunsaturated fatty acids (FAs), phytosterols, dietetic fibers, and others. The popularity and production areas of CG have been expanding worldwide, thus producing fruit with origin-substantiated differences in their nu...
Laurel (Laurus nobilis L.) is a plant species from Lauraceae family, and is native to the Mediterranean region. The goal of this study was to compare chemical composition of laurel leaves and antibacterial activity of its essential oil (EO) from wild-grown trees in Greece and Georgia. The laurel leaves from the two native habitats had dissimilar co...
Physalis peruviana L. (Cape gooseberry) is recognized as a valuable source of nutrients and antioxidants, and is extensively cultivated nowadays in many countries of the tropical and subtropical zone. To the best of our knowledge, there are no previous reports about the antioxidant capacity of P. peruviana fruits originating from Bulgaria. We hypot...
Introduction. The aim of the present study was to determine the
phytochemical composition of Helichrysum arenarium (L.) Moench
(aerial parts) essential oil and extracts obtained from Turkey as a source of bioactive components for the food, cosmetics and pharmaceutical industry.
Materials and methods. The flower essential oil was obtained by hydrodi...
The aim of this study was to evaluate the chemical composition of ripe Juniperus excelsa M. Bieb. galbuli (female cones) collected from "Izgoraloto Gyune" Reserve in Krichim, Bulgaria. The moisture (36.88%), abs. weight 693.96 g/1000 pcs., and the ash content (10.57%) of ripe galbuli were determined. Lipid fraction (9.12%), cellulose (13.54%), prot...
Grecian juniper (Juniperus excelsa M. Bieb.) is an evergreen tree and a rare plant found in very few locations in southern Bulgaria. The aim of this study was to evaluate the phytochemical content and antioxidant potential of J. excelsa unripe and ripe galbuli from three different locations in Bulgaria. The essential oil content ranged between 1.9%...
The main nutrients of seeds from bitter vetch (Vicia ervilia L.) were determined. The seeds were with Russian origin, introduced in Bulgaria. They possessed high carbohydrate (66.2%) and protein (20.1%) content, but their oil content was extremely low (1.4%). The starch and dietary fibers were found to be 20.4 and 3.1%, respectively. The individual...
Introduction. This research aims at determining the effect of canola oil and natural antioxidant of basil on chemical and sensory properties of fresh cheese.
Materials and methods. A fresh spreadable cheese was prepared by the use of fresh whole milk, canola oil and natural antioxidant of basil. The prepared cheese was analysed on fatty acid profil...
Salvia is the largest genus of the Lamiaceae family, representing approximately 1000 species and possessing a high rate of endemism all over the world. S. candidissima Vahl. ssp. occidentalis is a herbaceous perennial native throughout Turkey. This study aimed to estimate the phytochemical composition of S. candidissima Vahl. ssp. occidentalis. The...
The chemical composition of dill fruits (Anethum graveolens L.) originating in Bulgaria, France and Romania was determined. The composition of the lipid fraction and its fatty acid composition are determined. The fruits of France are the richest of essential oil (5.0%).The amount of protein ranges from 19.6 to 20.2% for fruits of different origins....
The surface tension, density and refractive index of coriander oil + ethanol (70, 75, 80, 85, 90, and 95%) solutions in ratios 1:5, 1:6, and 1:7 were measured. The density and surface tension decrease but refractive index increases as the percentage of etha-nol in the solution increases. The chemical composition of solutions was determined using GC...
The genus Nicotiana (Solanaceae) includes over 70 species, with a long history of traditional use; many of them are nowadays used in bioengineering, biosynthesis, molecular biology, and other studies, while common tobacco, N. tabacum L., is one of the most economically important industrial crops worldwide. Although Nicotiana species have been exten...
The objective of this study was to investigate the species identification, chemical composition and the antimicrobial activity of tuart (Eucalyptus gomphocephala DC) fruits and leaves. The essential oil content was 0.34 % and 0.23 % in the fruits and leaves, respectively. The main essential oil constituents of tuart fruits were 1,8-cineole (46.69 %...
The main objective of this mini-review was to synthesize recent data about the phytochemical composition, the nutritional properties, and the biological and pharmacological activities of a now cosmopolitan genus, Physalis (Solanaceae), being in the focus of intensive research over the last two decades. Six Physalis species with nutritional and phar...
The interest in carob pod as an ingredient of functional foods is constantly increasing due to its beneficial health effect and functional properties. The aim of this study was to evaluate the chemical composition and antioxidant potential of carob seeds, as well as the functional properties of its isolated galactomannan fraction. The lipid, protei...
Some physicochemical and thermal properties of (±) linalool-ethanol-water solutions with different ethanol concentrations were determined. The molar refraction was calculated and determined that decrease with increase of ethanol solvent in each series of solutions. Thermodynamic and thermal properties were calculated to describe the stability of th...
The thermodynamic and kinetic parameters of the extraction process of caraway fruit were studied. The thermodynamic parameters Gibbs free energy, entropy and enthalpy of the process, and the kinetic parameters activation energy, effective diffusion coefficient, reaction rate constant and rate constant of the process were determined. The extraction...
N. glutinosa L. is a relatively less studied Nicotiana species (Solanaceae), although there are data about its importance as a model plant in viral control studies, as a gene donor in tobacco hybridization and as a source of agents with insecticidal or fungicidal effects. The biological activities of the species were associated mostly with the pres...
Essential oils from the leaves and flowers of Micromeria frivaldszkyana obtained by hydrodistillation were analyzed by GC/MS for the first time. The yield of oils during the flowering stage was 0.69% in flowers and 0.26% in leaves. Thirty components were identified in the flower oil, representing 98.45% of the total content, with the main constitue...
Physalis peruviana L. fruit contain various functional compounds with health promoting effects. The aim of this study was to investigate the possibility of obtaining reduced sugar jellies from physalis juice with different sugars and sugar substitues.
Tobacco (Nicotiana tabacum L.) aroma is an important attribute of tobacco quality and is influenced by a variety of minor chemical components, including carotenoid degradation products. The objectives of this work were to determine the content of the most important fragrance-shaping carotenoid degradation products in the essential oils (EOs) of the...
Tobacco (Nicotiana tabacum L.) is not just an important industrial crop but also a source of phytochemicals with diverse biological and pharmacological activities. The study aimed at the investigation of the chemical composition and the antimicrobial activity of resinoids obtained from three types of tobacco grown in Bulgaria (Virginia, Burley, and...
