Kvasny Prumysl, 2002 (vol. 48), issue 10


Direct Analyses of Beer Macromolecular Complexes by Means of a New Differential Nephelometric Titration Method.Peer-reviewed article

P. SLADKÝ, H. CÍSAŘOVÁ, M. DIENSTBIER, P. GABRIEL

Kvasny Prum. 2002; 48(10): 268-272 | DOI: 10.18832/kp2002020  

A new method of analyses of beer and intermediates macromolecular complexes - Differential Nephelometric Titration (DNT) was developed. The method was analytically evaluated in various protein and PVP model solutions and their mixtures by titration with ammonium sulphate saturated solution. Observed characteristic structural maxima, minima and shoulders on the DNT curves were correlated with molecular weight bands of complexes in solution. Using the DNT method, the principal molecular weight bands of beer macromolecular complexes at approx. 100, 40 and 15 kDa were identified in agreement with literature data obtained by various chromatographic methods...

Malt Risk Potential.Peer-reviewed article

C. KONRAD

Kvasny Prum. 2002; 48(10): 274-275 | DOI: 10.18832/kp2002021  

Homogeneity of a malt batch is one of the most important parameters of malt quality. The analysis of homogeneity by Carlsberg Calcofluor method, in combination with automatic and standardized evaluation, provides a high declaratory capability. Above all, the analysis of filtration risk based on the data gives a high declaratory value in relation to malt processing and further brewing process. The acceptable analysis time (approx. 20 to 30 minutes) as well as the possibility of direct data exchange for the evaluation between the brewery and malting plant are the positive features of the method.Homogeneity of a malt batch is one of the most important...