Ágnes Keresztesi

Institute for Research and Development for Wildlife and Mountain Resources

The integration of monitoring systems in beekeeping has significant implications for the health and sustainability of honeybee colonies. These advanced systems, which include sensors for temperature, humidity, hive weight, and sound analysis, allow for real-time tracking of hive conditions, enabling beekeepers to respond promptly to potential threa...

The aim of this study was to provide customers with additional information by analyzing and comparing the nutritional data of different dairy product varieties in Romania. Milk is an ideal source of nutrition because it contains a balanced combination of carbohydrates, proteins, fats, minerals, and vitamins. In this study, the nutritional constitue...

Modern societies are characterized by increased air pollution, and particulate matter (PM) is one of the most significant air pollutants and is a major environmental health problem. Therefore, long- and short-term exposure via inhalation, ingestion, and dermal absorption of particulate matter may cause series health issues, such as cardio pulmonary...

The aim of this research was to evaluate the results obtained by ultrasonic tagging of sturgeon species and to collect field data for the period 2019-2021. Thus, an analysis was made of the information collected from the beginning of the period and also will be presented the migration capacity of sturgeons in the area of hydrotechnical arrangements...

Ecosystem-based approaches to climate change mitigation involves the use of ecosystems carbon storage and sequestration services. For this purpose, comprehensive CO2 efflux (Reco) measurements of the wetland and terrestrial ecosystems were performed in the adjacent area of Bucharest, by applying two complementary methods using close chambers: dynam...

A severe form of recurrent exertional rhabdomyolysis occurs enzootically in a well-defined region of Transylvania, Harghita county. At the highest lying two settlements (more than 800 m above sea level), the prevalence of equine rhabdomyolysis is between 17 and 23%, while in the neighbouring villages in the valley it is less than 2%. The objective...

Observations of particulate matter less than 10 μm (PM10) were conducted from January to December in 2015 in the Ciuc basin, Eastern Carpathians, Romania. Daily concentrations of PM10 ranged from 10.90 to 167.70 μg/m3, with an annual mean concentration of 46.31 μg/m3, which is higher than the European Union limit of 40 μg/m3. Samples were analyzed...

This study presents the PM10 concentration, respiratory and cardiovascular disease hospital admissions evolution in the Ciuc basin for a period of 9 years (2008–2016), taking into consideration different meteorological conditions: boundary layer, lifting condensation level, temperature-humidity index, and wind chill equivalent chart index. The PM10...

Long-term variations of ozone and its precursors have been examined in an intra-mountain closed basin during January 1st 2008 and June 30th 2017. A complete assessment of surface ozone concentration is given, investigating the ozone cycle, the weekend effect, seasonal and diurnal variability of O 3 and its precursors, photolysis of O 3 and the atmo...

The PM10 concentration reduction caused by large-scale precipitation in the Ciuc Basin was studied under no-wind conditions. The PM10 concentration changing before, during, and after the rainfall was followed up from 2008 to 2019. After the rainfall episode, the PM10 concentrations were lower in the cold and warm periods with 2.8 μg/m 3, and 2 μg/m...

The air quality decrease, especially in urban areas, is related to local-scale conditions and to dispersion of air pollutants (regional and long-range) as well. The main objective of this study was to decipher the seasonal variation of PM10, NO, NO2, NOx, SO2, O3, and CO over a 1-year period (2017) and the possible relationships between air polluti...

The association between air pollution and a wide-ranging spectrum of acute and chronic disorders—including cardiovascular diseases—is widely acknowledged. Exposure to airborne pollutants triggers harmful mechanisms such as oxidative stress and systemic inflammation, which lead to increased incidence of myocardial infarction, arterial hypertension,...

A comprehensive analysis of the chemical composition of precipitation was performed on rainwater samples collected between 1978 and 2017 over the conterminous US. A total of 86470 data records downloaded from the National Atmospheric Deposition Program were statistically analyzed and assessed in terms of precipitation chemistry. The ion abundance f...

The chemical composition of rainwater was studied from January 2009 to December 2017 in the northern group of Eastern Carpathians, Romania, taking under consideration air mass trajectories, the zonal index and zonal circulations, to show the imprints of long-range transported pollutants on the precipitation chemistry. Rainwater samples were analyze...

Extratropical cyclones are essential for climate conditions in midlatitude areas due to energy budget transfer which they sustain between the poles and tropical areas. With the multitude of cyclone tracking and detection methods developed over the years, the principal challenge focused on the agreement between them. For this purpose, we selected 12...

The aim of this study is the assessment of rainwater composition, regarding the various sources of major ions and heavy metals, taking into account the characteristic atmospheric circulations and the main air mass transport routes. Rainwater samples were analyzed for pH, electrical conductivity, major ions and heavy metals. At all sampling sites th...

Monthly time series of mean and maximum wind speed over the period 1961-2018 from 104 weather stations evenly distributed over Romania (spatially and elevation-wise) were tested for trends with the Mann-Kendall nonparametric test. The monthly mean wind speed is decreasing at about half of the stations, while increasing trends are between 5% (Novemb...

In order to identify changes in the annual temperature extremes, the Mann-Kendall non-parametric trend test has been applied to several thermal indices, recommended by the Expert Team on Climate Change Detection and Indices (ETCCDI). The indices were computed from gridded daily data of minimum and maximum temperature at 0.1° resolution (~10 km), fr...

Background The chemical composition of precipitation was assessed in 27 European countries from 2000 to 2017, offering a general point of view on the rainwater chemistry in Europe, contributing to a larger understanding of air pollution and atmospheric chemistry. Results The volume-weighted mean concentrations (VWM) were calculated, showing the r...

In order to investigate the precipitation chemistry, studies were carried out from January 2013 to December 2013 in Odorheiu Secuiesc and Miercurea Ciuc, Eastern Carpathians, Romania. During a period of eleven years (2006 – 2016), 2013 was the driest year. The rainwater samples were analyzed for pH, major anions and cations. HCO 3⁻ concentrations w...

In order to investigate the precipitation chemistry, studies were carried out from January 2013 to December 2013 in Odorheiu Secuiesc and Miercurea Ciuc, Eastern Carpathians, Romania. During a period of eleven years (2006-2016), 2013 was the driest year. The rainwater samples were analyzed for pH, major anions and cations. HCO3 − concentrations wer...

In the last years, the adsorption processes were proven effective and easy to use techniques to clean polluted wastewater. The purpose of this research is to examine the biosorption method on organic indicators (Methylene Blue, Malachite Green, Congo Red and Bromphenol Blue) in aqueous medium by using chicken eggshell. The adsorption process was in...

A comprehensive study on the chemical composition of precipitation, the influence of peat fires and their relations with atmospheric circulation was conducted in the year of 2012, in two intra-mountain basins, the Ciuc basin (CB) and the Giurgeu basin (GB), Eastern Carpathians, Romania. Atmospheric circulation types showed the presence of a westerl...

A comprehensive study on the chemical composition of rainwater was carried out from 2006 to 2016 in four sampling locations from the Eastern Carpathians, Romania, in order to study the differences between the precipitation chemistry and atmospheric circulations of intra-mountain and extra-mountain areas. All samples were analyzed for pH, electrical...

This paper presents the evolution of ozone concentration for the 2007-2016 decade and a comparison with key values related to human and vegetation health. As temperature is one of the main factors influencing ozone concentration in this area, the most significant changes of air temperature and extreme temperature indices for the 2007 - 2016 decade...

A study of precipitation chemistry was conducted from 2006 January to 2016 November in the Ciuc and Giurgeu basin, Eastern Carpathians, Romania. The results show that the natural precipitation in these areas is alkaline, with a volume weighted mean (VWM) of 6.49 and 6.88 in Ciuc and Giurgeu basin, respectively. NH4+ is the most potential species to...

A study of precipitation chemistry was conducted for 11 years (01 January 2006 - 31 December 2016) in the Ciuc basin, Eastern Carpathians, Romania. The studied area is an enclosed basin, also called 'the Carpathians cold pole'. All collected samples were analyzed for major cations and anions. HCO3− concentrations were calculated based on the empiri...

Noxious agents released into the atmosphere that can cause harmful effects on human health and environment are often in the form of a complex of toxic substances in which both solid and gas particles are present. Polluting elements do not remain at the sources where they are produced, but due to influential factors, they are propagated to significa...

Assessing the corrosion condition and structural modifications which occur in old concrete structures could provide valuable information regarding the preservation state of the historical construction as well as the needed support for future maintenance works in order to minimize as much as possible the loss of these structures with important histo...

Air quality modelling is an essential tool for most air pollution studies. The air quality models are the means whereby pollutant emissions can be related to atmospheric pollutant concentrations. The uncertainties in assessment of air quality are related to both the quality of measured values of pollutant concentrations in local network and the inp...

Studies on precipitation chemistry were carried out from January 2006 to November 2016 at Miercurea Ciuc, Ciuc basin, and Joseni, Giurgeu basin, Eastern Carpathians, Romania. A total of 362 and 114 samples were collected at Miercurea Ciuc and Joseni, respectively, and were analyzed for pH, major cations and anions (NH4+, Na+, K+, Ca2+, Mg2+, Cl-, N...

The goal of this paper is to present an analysis of evolution in time and trends of air temperature, and the number of days with significant characteristics of the air temperature, in the city of Miercurea-Ciuc (Romania) for the 2006-2015 timeframe. The data were measured at an hourly basis by the Miercurea-Ciuc weather station, situated at an alti...

Beginning with the statement of the World Conference on Environment and Sustainable Development from Rio de Janeiro (1992), the world's countries have started to develop national policies for implementing the concept of sustainable development. The experiences of those years led to a more pragmatic approach of the sustainable development implementi...

This study summarizes the results of a continuous measurements of gaseous pollutants, NO, NO2, NOx and O3 in the ambient air of Ciuc basin. The main objectives of this report were to characterize the concentration and temporal variations of ozone and its precursors in Ciuc basin; to discuss the relationship between ozone and atmospheric oxidation O...

This study summarizes the results of continuous measurements of gaseous pollutants, NO, NO2, NOx and O3 in the ambient air of Ciuc basin. The main objectives of this report were to characterize the concentration and temporal variations of ozone and its precursors Ciuc basin; to discuss the relationship between ozone and atmospheric oxidation and in...

Studies on precipitation chemistry were carried out from January 2006 to December 2016 at Miercurea Ciuc, Ciuc basin, Eastern Carpathians, Romania. A total of 362 samples were collected and were analyzed for pH and major cations and anions (NH4+, Na+, K+, Ca2+, Mg2+, Cl−, NO3−, and SO42−). HCO3− concentrations were calculated through pH measurement...

Plenary session