Authors:Tamás Magyar, Felipe Werle Vogel, Florence Tóth, Attila Nagy, János Tamás, and Péter Tamás Nagy
products formed during hydrolysis. The metabolism of these compounds results in the formation of alcohols, ketones, CO 2 , H 2 S and, mainly volatile organic acids, with acetic, propionic and butyric acids found in higher concentrations [ 10, 14 ]. The
Authors:J.K. Odusote, A.A. Adeleke, P.P. Ikubanni, O.S. Ayanda, J.M. Abdul, and R.A. Yahya
corrosion, a passive oxide adherent film is usually formed in various environments. The amphoteric nature of the oxide film causes it to dissolve significantly when the metal is placed in a high concentration of acidic or basic media [ 5 ]. After the oxide
Authors:Ezekiel Folorunso Sodiya and Folasegun Anthony Dawodu
surface [ 5 , 6 ]. On the other hand, when a plant extract of higher number of inhibitory secondary metabolites but lower concentrations of phytochemicals as in the case of Jatropha curcas [ 7 , 8 ] determined qualitatively was synergized with another
field predictions using different turbulence models, whereas combustion characteristics (e.g., temperature and gas concentration) were predicted reasonably well by all models.
One of the turbulence-chemistry interaction models most used with
Authors:Ikram Abarkan, Abdellatif Khamlichi, and Rabee Shamass
components frequently contain geometric discontinuities such as groove, fillet, and holes (i.e., notches) that, due to the phenomenon of stress concentration, can produce extensive plastic deformation even at applied stresses lower than the elastic limit
Detailed analysis of household generated greywater (GW) samples is an essential task for the design of treatment systems before reuse. In this paper modern analytical methods will be discussed, which were applied to determine the ionic and elemental concentration of different GW samples. Ion chromatography (IC) and Microwave plasma atomic emission spectrometry (MP-AES) methods were used to spoor the composition of GW samples. It was shown that from the IC results and from calculated parameters (Na ee% and SAR) the application of raw or treated GW flows for irrigation is controlled. According to the elemental concentration, GW samples from laundry/kitchen sink and dishwasher proved to be the most contaminated compared to drinking water, while the concentration of the measured elements did not elevate as significantly in GW samples from shower/bathtub.
The aim of this article is to examine the effect of temperature, humidity, air velocity and CO2 concentration regarding the human behaviour in indoor environment with natural ventilation, i.e. without a ventilation device, or where there is forced ventilation or an air conditioning.
protection of the public against indoor exposure to radon (90/143/Euratom)
Nagy É. H., Breitner D., Horváth Á., Szabó Cs. Study of a passive radon mitigation process and indoor radon concentration’s time dependence after
It is a prime aim to ensure a suitable comfort level in case of office buildings. The productivity of office employees is directly influenced by the comfort. Thermal discomfort and poor indoor air quality deteriorate the intensity and quality of human work. We investigated the comfort in office buildings with on-site measurements during the summer season. The office buildings were operating with different HVAC (Heating, Ventilating and Air-Conditioning) systems: ducted fan-coil with suspended ceiling, installation, non-ducted fan-coil with floor-mounted installation, active chilled beam with fresh air supply.
We evaluated the thermal comfort under PMV (Predicted Mean Vote), PPD (Predicted Percentage of Dissatisfied), the local discomfort based on DR (Draught Rate) and the IAQ (Indoor Air Quality) based on carbon dioxide concentration. The comfort measurements were evaluated. The measurements were evaluated with scientific research methods, comfort categories based on the requirements of CR 1752. The results of this comparison were presented in this article.