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environment of the human body. The simulated body fluid (SBF) is an example of an artificial solution, which should contain similar inorganic ions (Ca 2+ , Mg 2+ , K + Na + , HPO 4 2- , Cl − ) in similar concentrations to those of the human blood plasma to
time). It was found that cracks in the reflow-soldered joint propagated from the solder surface to the inner joint as a result of stress concentration deriving from the mismatch of various thermal expansion coefficients in the joint assembly. High
meteoritical cooling rates. Goldstein et al. [ 2 ] estimated this parameter using the diffusion coefficients for Ni in Fe. Another method [ 2 , 3 ] was based on a processing of Ni concentration data across kamacite band and taenite–kamacite border. Later, the
amount of oxygen in it; however, the side 2 (A″) of Figure 9 c shows a very high concentration of the silicon, nitrogen, and oxygen. This means that the dark phase (A″) is a combination of silicon oxide and silicon nitride which explains its higher
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
for gas concentration tolerances . [2] Palko M. ( 2014 ), Physical assessment of a window using a computer simulation . Advanced
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
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.
Abstract
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.
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.
