50 research outputs found
Bracketing the age of freshwater carbonate formation by OSL dating near Lake Kolon, Hungary
Freshwater carbonates are unique depositions in the centre of the Carpathian Basin, with debated origin and age. Their formation on the sand covered area of the Danube-Tisza Interfluve is mainly related to lakes appearing in low lying interdune areas from time-totime. Carbonate deposition is governed by various processes, but in general it can be traced back to climatic and concomitant surface and subsurface hydrological variations. Therefore marl, limestone and dolomite layers can be a marker of environmental change. To identify the type of environmental change they may indicate absolute or numerical ages are needed. In previous studies this issue has been addressed by the means of radiocarbon dating. In the present study we attempted to bracket the age of freshwater carbonate formation with the help of optically stimulated luminescence dating and compared our results to radiocarbon data from the literature. In general, the luminescence properties of the investigated samples proved to be suitable for determining the age of the bedding and covering sediments. OSL dates confirmed previous interpretations that freshwater carbonate formation in the area could have a peak around 10,5 ka. However, the termination of the deposition could not be unambiguously determined at the present stage of the analysis. The compound geomorphology and sedimentology of the study area call for further investigations
Mapping Freshwater Carbonate Deposits by Using Ground-Penetrating Radar at Lake Kolon, Hungary
Freshwater carbonate deposit, as a special phenomenon in the Danube-Tisza Interfluve, located in the centre of Hungary, is a significant geological heritage in the Carpathian Basin. At present there is not any applicable method to investigate the presence of carbonate layers in an undisturbed way, as neither vegetation nor morphological characteristics indicate unambiguously these formations. Ground-penetrating radar technology is widely used in various earth science related researches, and the number of applications is steadily increasing. The aim of the study was to determine the spatial extension of freshwater limestone using geophysical methods near Lake Kolon, Hungary. The lake, which is now a protected wetland area with opened water surfaces, was formed in the paleo-channel of the River Danube. Measurements were performed with the help of ground-penetrating radar, the results were calibrated by high spatial resolution drillings. Investigations have been made since 2012, and freshwater limestone was detected at several locations determining the more exact extension of the formation. Ground-penetrating radar proved to be an appropriate method to detect the compact and fragmented freshwater limestone layers in such an environment. However, based on the results the method can be best applied under dry soil or sediment conditions while the uncertainty of the results increases significantly as a matter of higher soil moisture. Further control measurements are necessary verified by several drillings in order to give an exact method to determine freshwater limestone
Szenior versenyúszók antropometriai értékeinek, életminőségének és táplálkozásának felmérése
összefoglalás: RĂ©gi Ăşj igazság, hogy a fizikai aktivitás egĂ©szsĂ©ges, amit Ă©vezredek tapasztalatai Ă©s modern kutatások bizonyĂtanak. Ez azĂ©rt aktuális hazánkban, mert a magyar lakosságra jellemzĹ‘, hogy keveset mozog, Ă©s ez az egyik oka, hogy magas az elhĂzottak Ă©s tĂşlsĂşlyosak aránya. A kutatás cĂ©lja volt egyrĂ©szt vizsgálni a szenior versenyĂşszás, mint fizikai aktivitás
hatását a testösszetĂ©telre Ă©s Ă©letminĹ‘sĂ©gre, másrĂ©szt a táplálkozási szokások felmĂ©rĂ©se. A felmĂ©rĂ©sben rĂ©szt vett szenior versenyĂşszĂłk (n = 93) testzsĂr % Ă©s vázizomtömeg Ă©rtĂ©kei jobbak voltak a referenciaĂ©rtĂ©kekhez kĂ©pest. A felmĂ©rt csoport Ă©letminĹ‘sĂ©ge is kedvezĹ‘ Ă©rtĂ©keket mutatott a magyar lakosság átlagĂ©rtĂ©keihez kĂ©pest minden korcsoportban. A táplálkozásuk nagyobb arányban felelt meg
az ajánlottnak, ám emellett is sok hiányosság volt kimutathatĂł. KövetkeztetĂ©skĂ©ppen a szakirodalmi adatok Ă©s a felmĂ©rĂ©s alapján elmondhatĂł, hogy a szenior versenyĂşszás pozitĂv hatással lehet a testösszetĂ©telre Ă©s Ă©letminĹ‘sĂ©gre. Emellett az Ă©letmĂłd másik fontos tĂ©nyezĹ‘je a helyes táplálkozás tudatosĂtása fontos elem lehetne az egĂ©szsĂ©gfejlesztĂ©s rĂ©szekĂ©nt.
is not a new statement that physical activity has a positive effect on health which is proved by experiences of centuries and modern researches. It is always relevant because Hungarian population has an inadequate level of physical activity what is one of the several reasons that the prevalence of obesity is high. The purpose of this study was to examine the
effect of Masters swimming on body composition and quality of life and to analyze nutrition. The data showed that masters swimmers (n = 93) have better body fat percentage and skeletal muscle mass values compared to the reference values. The quality of life scores were as well better compared to the average scores of the Hungarian population. The nutrition of the Masters swimmers was adequate in higher
proportion than non-adequate compared to the nutritional recommendations but there was a considerable amount of inadequacies. In conclusion, according to the data of scientific literature and this study, masters swimming can have a positive effect on body composition and quality of life. Besides, to promote health it is recommended to improve nutrition which an important life style factor
Bracketing the age of freshwater carbonate formation by OSL dating near Lake Kolon, Hungary
Freshwater carbonates are unique depositions in the centre of the Carpathian Basin, with debated origin and age. Their formation on the sand covered area of the Danube-Tisza Interfluve is mainly related to lakes appearing in low lying interdune areas from time-totime. Carbonate deposition is governed by various processes, but in general it can be traced back to climatic and concomitant surface and subsurface hydrological variations. Therefore marl, limestone and dolomite layers can be a marker of environmental change. To identify the type of environmental change they may indicate absolute or numerical ages are needed. In previous studies this issue has been addressed by the means of radiocarbon dating. In the present study we attempted to bracket the age of freshwater carbonate formation with the help of optically stimulated luminescence dating and compared our results to radiocarbon data from the literature. In general, the luminescence properties of the investigated samples proved to be suitable for determining the age of the bedding and covering sediments. OSL dates confirmed previous interpretations that freshwater carbonate formation in the area could have a peak around 10,5 ka. However, the termination of the deposition could not be unambiguously determined at the present stage of the analysis. The compound geomorphology and sedimentology of the study area call for further investigations