IBD GCD Key Terms Test with Complete Solutions

IBD GCD Key Terms Test with Complete Solutions ABV - Answer-The standard method of measuring the concentration of ethyl alcohol (ethanol) in water. The units are percentage (%) Alcohol By Volume. Acetaldehyde - Answer-An unwanted flavor compound produced as a co-product (congener) of fermentation and distillation. Acetic Acid - Answer-An organic acid (Vinegar) also produced as a congener of fermentation and distilling. Acetobacter - Answer-A contaminating bacteria responsible for producing acetic acid. Aeration - Answer-The mixing of air with liquid but usually means mixing with wort. Aerobic / Anaerobic - Answer-With or without the presence of oxygen Alcohol - Answer-There are different types of alcohol but generally refers to the principal product of fermenting sugar with yeast. Proper chemical name is ethyl alcohol or ethanol (C2H5OH). Absolute alcohol (anhydrous ethanol) is generally defined as having less than 1% water. Alembic - Answer-Alternative term for a pot still (q.v.), especially in brandy distillation. Aleurone Area - Answer-A layer of cells under the skin of barley responsible for the production of enzymes which can break down starch to fermentable sugars. Alkali - Answer-Opposite of acid, alkalis have high pH (q.v.) Strong alkalis are commonly used as sterilising agents because. of their anti-microbial effects. Amyl Alcohol - Answer-A higher alcohol (q.v.) normally produced in greatest amount during fermentation, and therefore the principal component of the fusel oil (q.v.) collected during distillation. Amylase - Answer-Collective term for two types (Alpha and Beta) of enzyme which break down starch molecules to fermentable sugars. Analyser Column - Answer-Primary continuous-distillation column for separating ("stripping") alcohol from fermented beer/wash/wine.