Faculty of Veterinary Medicine

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NATURAL RADIOACTIVITY LEVELS IN SOME VEGETABLES COMMONLY USED IN THE CITY OF SKOPJE (MACEDONIA)
(International Scientific Publications, 2022-09-18)
Aleksandra Angeleska
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Radmila Crceva-Nikolovska
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Elizabeta Dimitrieska-Stojkovikj
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Vasilka Poposka-Trenevska
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Katerina Blagoevska
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Analysis of wheat production in the Republic of North Macedonia from 2016-2019
(Institute of Agricultural Economics, 2021-09)
Aleksandra Angeleska
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Risto Uzunov
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Radmila Crceva-Nikolovska
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Elizabeta Dimitrieska-Stojkovikj
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Katrina Blagoevska
Corn, wheat and other different types of cereal crops, are one of the basic nutritional products in general, which have essential and vast application in the daily diet of people around the world. Cereal crops are the most important food sources, and cereal-based food is the main source of energy, protein, B vitamins and minerals for the world population. Therefore, the goal of this research is to analyze the production of wheat on arable land in the Republic of North Macedonia, as an agricultural country, which will indirectly help to draw conclusions about the impact on the economic structure of the population, their standard of living, the investment and economic fluctuations in market prices, taken as a sui generis element, set as an assumption ceteris paribus against the other determinants and factors that affect the national economy in the Republic of North Macedonia.
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DETERMINATION OF MILK FAT ADULTERATION IN SOUR CREAM WITH VEGETABLE OILS BY GC-FID METHOD
(Congress for Food Quality and Safety, Health and Nutrition – NUTRICON, 2021-12-31)
Zehra Hajrulai-Musliu
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Risto Uzunov
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Aleksandra Angeleska
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Vasilka Poposka-Trenevska
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Mila Arapcheska
Food adulteration appears in all areas of the food industry, most often to reduce production costs and to earn extra money. In the dairy industry, the adulteration of milk fat with vegetable oils is an act of intentionally reducing their qualities. Мilk fat in milk and dairy products can be partially or completely substituted with vegetable oils. The most often adulterants of vegetable oils are palm oil and coconut oil. The aim of this study is determination of vegetable oils in sour cream by GC-FID method.
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RADIOACTIVITY LEVELS IN SOME MUSHROOM SPECIES COLLECTED FROM MACEDONIA AND CONSEQUENT DOSES
(Faculty of Agriculture (University of East Sarajevo), 2022-03-01)
Aleksandra Angeleska
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Radmila Crceva-Nikolovska
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Elizabeta Dimitrieska-Stojkovikj
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Katerina Blagoevska
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Biljana Stojanovska-Dimzoska
Mushrooms are bioindicators in the environment that accumulate radionuclides, therefore they can pose a radiological threat. In the Republic of Macedonia, mushrooms are widely consumed as a part of the diet, for this reason their radiological control is required. In this research, the activity concentrations in different types of mushrooms (Boletus edulis, Marasmius oreades, Morchela conica, Lactarius deliciosus) were determined. The mushrooms were collected from six different locations in the Republic of Macedonia, and information on the radiation dose for the general population were obtained with this measurement. The analyses were performed by means of HPGe gamma spectrometry, i.e. an instrument - gamma spectrometer (Canbera Packard) with a high purity germanium detector. The obtained spectra from the measurement were analyzed by using the GENIE 2000 program. On the basis of the performed tests, the mean values for the activity concentrations in the mushrooms were as follows 41.9±1.2 Bq kg − 1 for 226Ra, 40.3±1.8 Bq kg − 1 for 232Th, 83.75±6.2 Bq kg − 1 for 40K, and 2.34±0.24 Bq kg − 1 for 137Сs. The mean value of the radiation risk index Heks is lower than the maximum allowed value which is <1 for Heks. The value of the radium equivalent activity Raeq is below the maximum recommended limit, i.e. 370 Bq kg-1. Significant variations were not observed in regard to the activity concentrations of 137Cs and 40K in the same mushroom species from different sampling points. High activity concentrations of 137Cs activity were not detected in any of the mushrooms. The researches in this study show that all mushroom samples pose no biological threat, i.e. it was found that the analyzed radionuclides do not pose a health risk and the levels are below the international standards.
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Activity concentration of natural radionuclides in chicken feeds in the Republic of North Macedonia
(Croatian Agronomic Society, 2022-04-20)
Aleksandra Angeleska
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Radmila Crceva-Nikolovska
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Elizabeta Dimitrieska-Stojkovikj
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Katerina Blagoevska
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Biljana Stojanovska-Dimzoska
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Radionuclide contamination and nutritional evaluation of the wheat mostly used in the Republic of North Macedonia
(University of Banjaluka, Faculty of agriculture, 2022-06-30)
Aleksandra Angeleska
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Radmila Crceva-Nikolovska
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Elizabeta Dimitrieska-Stojkovikj
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Zehra Hajrulai-Musliu
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Biljana Stojanovska-Dimzoska
Wheat is one of the world's most commonly consumed cereal grains. It originates from a type of grass (Triticum) that is grown in countless varieties worldwide. Bread wheat or common wheat is a primary species. Several other closely related species include durum, spelt, emmer, einkorn, and Khorasan wheat. In addition to being a major source of starch and energy, wheat also provides substantial amounts of a number of components which are essential or beneficial for health, notably proteins, vitamins (notably B vitamins), dietary fibres, and phytochemicals. Wheat is a basic food product of Macedonian population. This study is mainly focused on measuring the concentration of radioactivity due to natural radioactive nuclides (226 Ra, 232 Th, 40 K) in wheat grain samples, as well as on determining the quality of wheat used in daily diet. In addition, in this study we calculated radiation hazard indices (radium equivalent activity and internal hazard index) in the wheat sample. Average activity concentrations of 226 Ra, 232 Th, and 40 K in the wheat samples were 0.57±0.14; 0.39±0.11; 96.55±0.86 (Bq·kg-1), respectively. The radiation hazard indices were calculated for all samples in this study where mean values did not exceed safety limits, pointing out to negligible radiation hazard arising from terrestrial radionuclides that are naturally present in wheat. In terms of quality, we confirmed that all tested samples meet the requirements regarding quality in accordance with the laws in our country.
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Dietary Exposure and Health Risk Assessment of Aflatoxin M1 in Dairy Products Consumed by Population in North Macedonia
(Shahd Sadoughi University of Medical Sciences@ Health Services, 2022-06-30)
Gordana Ilievska
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Biljana Stojanovska-Dimzoska
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Dushica Koceva
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Goran Stojkovic
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Aleksandra Angeleska
Background: Aflatoxins (AFs), as secondary metabolites, are mainly produced by fungi of Aspergillus genus. The determination of contamination rate, dietary exposure, and health risk assessment for aflatoxin M1 (AFM1) was conducted aimed to estimate potential health risks for the population of North Macedonia. Methods: A total of 974 dairy samples, including 404 Ultra-High Temperature (UHT) milk, 291 ice cream, 178 yogurt, and 101 cheese were collected from the markets in North Macedonia. Analysis of AFM1 was done using Enzyme-Linked Immunosorbent Assay and High-Performance Liquid Chromatography with Fluorescence Detection Results: The AFM1 incidence was highest in yogurt samples (93.8%) and lowest in UHT milk samples (67.8%). AFM1 concentrations were 49.1±68.4, 30.9±30.0, 35.1±40.4, and 40.1±90.1 ng/kg for UHT milk, ice cream, yogurt, and cheese samples, respectively. The Estimated Daily Intake (EDI) for the average population and high consumers (upper bound; samples with AFM1
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Investigetion of the cultivation influence on the levels of natural radionucleides in soil from the surrounding of the city of Skopje.
(Society of physicists of Macedonia DFRM, 2017-04-28)
Aleksandra Angjeleska
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Elizabeta Dimitrieska-Stojkovikj
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Biljana Stojanovska-Dimzoska
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Evaluation of dose for the population due to natural radioactivity of uncultivated soil from the surrounding of the city of Skopje
(BENA, 2016)
Aleksandra Angjeleska
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Elizabeta Dimitrieska-Stojkovikj
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Bosko Boskovski
Determination of natural radionuclides in the environment is important as relevant parameter for radiological risks estimations. The objective of this research was focused to define the activity concentrations of 226Ra, 232Th, and 40K in samples of uncultivated soil, taken from 13 locations in the surrounding of the Skopje city. Within the research performed, the obtained data indicated that the value of 232Th and 226Ra activity was within the range from 27.06 to 43.66 Bq kg–1, and from 20.38 to 39.44 Bq kg–1, respectively. As expected, the 40K concentration in soil was significantly higher, ranged between 392.48 and 625.80 Bq kg–1. The concentrations obtained were the basis for calculation of other parameters that are fundamental for determination of the environmental radiation safety for the population. The obtained results from this study suggest that in the surrounding of Skopje there is no significant radiation risk for the population, i.e. the safe limits were not exceeded, pointing out the insignificant risk that arises from naturally occurring radionuclides in the environmental soil.
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Aflatoxins occurrence in feeding stuffs for poultry
(Faculty of Veterinary Medicine-Skopje, Ss. Cyril and Methodius University in Skopje, North Macedonia, 2016-09-24)
Katerina Davceva
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Biljana Stojanovska Dimzoska
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Elizabeta Dimitrieska-Stojkovikj
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