• MeSH
• biogenní aminy analýza   normy   MeSH
• financování organizované MeSH
• pivo analýza   normy   MeSH
• polyaminy analýza   normy   MeSH
• Geografické názvy
• Česká republika MeSH

• Publikační typ
• abstrakt z konference MeSH

The net effect of increased wort osmolarity on fermentation time, bottom yeast vitality and sedimentation, beer flavor compounds, and haze was determined in fermentations with 12 degrees all-malt wort supplemented with sorbitol to reach osmolarity equal to 16 degrees and 20 degrees. Three pitchings were performed in 12 degrees/12 degrees/12 degrees, 16 degrees/16 degrees/12 degrees, and 20 degrees/20 degrees/12 degrees worts. Fermentations in 16 degrees and 20 degrees worts decreased yeast vitality measured as acidification power (AP) by a maximum of 10%, lowered yeast proliferation, and increased fermentation time. Repitching aggravated these effects. The 3rd "back to normal" pitching into 12 degrees wort restored the yeast AP and reproductive abilities while the extended fermentation time remained. Yeast sedimentation in 16 degrees and 20 degrees worts was delayed but increased about two times at fermentation end relative to that in 12 degrees wort. Third "back-to-normal" pitching abolished the delay in sedimentation and reduced its extent, which became nearly equal in all variants. Beer brewed at increased osmolarity was characterized by increased levels of diacetyl and pentanedione and lower levels of dimethylsulfide and acetaldehyde. Esters and higher alcohols displayed small variations irrespective of wort osmolarity or repitching. Increased wort osmolarity had no appreciable effect on the haze of green beer and accelerated beer clarification during maturation. In all variants, chill haze increased with repitching.

• MeSH
• acetaldehyd analýza   MeSH
• alkoholy analýza   MeSH
• časové faktory MeSH
• chuť MeSH
• diacetyl analýza   MeSH
• estery analýza   MeSH
• fermentace MeSH
• financování organizované MeSH
• mikrobiální viabilita MeSH
• osmotický tlak MeSH
• pentany analýza   MeSH
• pivo analýza   mikrobiologie   MeSH
• Saccharomyces fyziologie   MeSH
• sulfidy analýza   MeSH

• MeSH
• metabolismus MeSH
• mikrobiální genetika MeSH
• mikrobiologie životního prostředí MeSH
• mikrobiologie MeSH

• Konspekt
• Mikrobiologie
• Učební osnovy. Vyučovací předměty. Učebnice
• NLK Obory
• mikrobiologie, lékařská mikrobiologie
• NLK Publikační typ
• učebnice vysokých škol