Kleinová J., Klejdus B. (2014): Determination of volatiles in beer using solid-phase microextraction in combination with gas chromatography/mass spectrometry. Czech J: Food Sci., 32: 241–248. Headspace solid phase microextraction and purge and trap analysis were used for the determination of volatiles in beer. These methods were compared with the analysis of unconcentrated gas phase and liquid ...

We present in this work simulations using the finite difference approximation in 2D for the melting of an encapsulated phase-change material suitable for heat storage applications; in particular, we study CaCl2·6H2O in a cylindrical encapsulation of internal radius 8 mm. We choose this particular salt hydrate due to its availability and economic feasibility in high thermal mass building walls o...

Aluminum recycling is a promising solution to environmental and economic issues. Secondary aluminum production will rise in the near future; however, process not without challenges. Some of major concerns during remelting are metal losses due oxidation molten removal impurities from bath. The current study summarizes latest progress use solid salt fluxes for secondary treatment metal. chemistry...

Essential requirements for the maintenance of active uptake of sodium chloride in isolated frog skin in Ringer's solution are: sufficient oxygen supply (8); neutral or slightly alkaline reaction of Ringer's solution (10); a reasonable temperature, e.g. 25°C., of the environment (10). A few years ago it was found (11) that, in addition to the above mentioned factors, the K + level in Ringer's so...

5-Hydroxytryptamine(1B) (5-HT(1B)) receptors have been implicated in mediating arterial contraction to 5-HT. Additionally, the 5-HT(1B) receptor has been reported to be "unmasked" by depolarizing stimuli. We hypothesized that 5-HT(1B) receptors in arteries from hypertensive animals, arteries reported to have a depolarized resting membrane potential in smooth muscle cells, are unmasked and parti...

ATP-stimulated prostacyclin release from veins was investigated using epigastric veins isolated from hamsters. Veins were perfused with MOPS-buffered physiological salt solution (PSS). ATP was administered into the perfusate, and the bath solution (MOPS-PSS) was collected and assayed for the presence of the stable prostacyclin metabolite 6-keto-PGF1alpha. ATP (100 microM) resulted in reproducib...

Cadmium sulphide films were prepared by Chemical Bath Deposition (CBD) technique from CdCl2, CdSO4, Cd(CH3COO)2 respectively, as cadmium precursor salts, and thiourea in ammoniacal medium. In this paper we study the changes in the morphology and properties of the films prepared from different cadmium salts, although the starting reaction parameters as concentration of the reactants, pH (denoted...

background: the newborn’s first bath, performed in neonatal intensive care units (nicu), is believed to be a stressful situation, especially for the premature infants. as a developmental care approach, swaddle bathing is a low-stress bathing method for vulnerable preterm neonates. given the limited number of the studies examining this bathing method, the present study was conducted with the aim...

A quantum Langevin model, like models from optomechanics, was developed for phonons. It predicts intermodulation phonon sidebands (IPSs) in anharmonic crystals. Ab initio calculations of phonons rock-salt NaBr showed these spectral features as many-body effects. Modern inelastic neutron scattering measurements on a crystal at 300 K revealed diffuse intensity high energy predicted upper IPS. The...