Chapter 9 Flashcards
yang dijadikan starter
log phase. starter bisa dalam bentuk freeze dried powder o, liquid/pasta, single or mixed cultures
types of fermentation
- alcoholic
yeast - lactic acid
lactic acid bacteria - acetic acid bacteria
acetic acid bacteria - alkaline fermentation
bacillus sp
homofermentative end products and enzyme
lactic acid. enzyme: aldolase
heterofermentative end products and enzyme
lactic acid and ethanol. enzyme: phosphoketolase
alkaline fermentation usually takes place with the help of bacterium…….
bacillus subtilis
b. subtilis is found on untreated grains and tolerates heat very well.
valuable m.o cultivated by humans to induce alkaline fermentation are…
aspergillus or mucor, inoculated into the graons only after cooking
fermentation of milk
produce lactic acid from lactose, gel pH 5.2, protein precipitation 4.6 at 20-45 derajat c.
yoghurt starter
s. thermophilus (39 derajat celcius), l. bulgaricus (45 derajat celcius)
acidophilus milk
l. acidophilus
kefir, koumiss
LAB and yeat
chymosin enzyme/rennet
produce calcium phosphate para caseinate from casein, temperature at 30c 30min, cheese with LAB, cheese ripening in 4,4-7c for up 12 months
soft cheese
unripened (mozzarella, cottage)
ripened: camembert, brie
salt-cured: domiati
semi soft
ripened by mold (danish blue)
ripened by bacteria: brick, goudam, edam
hard cheese
without eyes, ripened by bacteria (cheddar)
with eye: ripened by bacteria (emmental)
very hard cheese
parmesan
fermentation of fish
- peda
LAB, kembung - fish sauce
LAB, small fish - terasi/bekasam
LAB, fish
fermentation of meat
- salt tolerant (2-4%), ex: sausage
- culture:
- p. cereviciae
- p. acidilactisi
- p. pentosceus
- l. plantarum
- m.variants
fermentation of fruit
brine fermentation (added 2.5% of salt)
ex: sauerkraut, pickles
culture: l. mesenteroides, l. brevis, p. cereviceae
fruit fermentation
use yeast/bacteria
ex: cider, wine, nata, vinegar
fermentation of beer
s. cereviceae, barley malt + plant flower: hops
fermentation of bread
s. cereviceae + c. krusei: produce co2
l.plantarum + l.acidophilus: produce flavor
fermentation of tape and brem
s. cereviceae, glutenized rice or cassava
fermentation of tempe
r. oligosporus