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SWE Study Guide > Ch2-Wine Faults > Flashcards

Ch2-Wine Faults Flashcards

1
Q

What is the aroma of corked wine?

A

musty, moldy, wet basement

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2
Q

What is the source of cork taint?

A

mold on and in bark of a cork oak tree

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3
Q

What is the chemical that causes a corked wine?

A

2,4,6 trichloroanisole or TCA

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4
Q

What is the recognition threshhold for TCA?

A

low; 2 - 7 parts per trillion

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5
Q

What are the 3 chemicals that could appear in wine resulting from sulfur?

A

sulfur dioxide (SO2), Hydrogen sulfide (H2S), mercaptan

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6
Q

What causes a wine to smell like burnt matches?

A

sulfur dioxide

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7
Q

How is SO2 related to pH?

A

the more acdic the wine, the more pronounced the SO2 will be.

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8
Q

What causes wine to smell like rotten eggs?

A

If sulfur rich wine sits too long with absence of oxygen, hydrogen sulfide forms

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9
Q

What sulfur risk is there for screw cap wines?

A

hydrogen sulfide since no oxygen gets through the cap

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10
Q

What causes wine to smell like garlic / onions?

A

merceptan - result of sulfur and ethanol combining

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11
Q

What is the most serious of sulfur compounds?

A

merceptans; no way to fix

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12
Q

What are the 2 bacteria that can survive the acidic environment in wine?

A

lactic bacteria and acetobacter

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13
Q

What is the odor of acetic acid?

A

vinegar

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14
Q

What is the odor of butyric acid?

A

rancid butter or spoiled cheese

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15
Q

What is the odor of lactic acid?

A

sauerkraut or goat

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16
Q

What is the odor of ethyl acetate?

A

fingernail polish remover or airplane glue

17
Q

What is ascensence?

A

when acetic acid and ethyl acetate combine

18
Q

What is the odor of geranium?

A

geranium leaves; caused by incomplete malolactic fermentation

19
Q

What is brett / brettanomyces?

A

member of the yeast family

20
Q

What are odors from brett?

A

swetty, horsy, ‘band aid like’, medicinal

21
Q

What is a green odor?

A

smell of leaves from using underripe grapes

22
Q

What is acetobacter

A

Bacteria that can convert alcohol into acetic acid

23
Q

What is the smell of oxidized wine?

A

nutty, carmelized like fino sherry. Can brown a wine; mute the fruit flavors

24
Q

What is the smell of materized wine?

A

cooked or baked odor from excessive heating

25
Q

What does it mean if a wine is rubbery?

A

smells like rubber; low acid wine or excess sulfur

26
Q

What does it mean if a wine is yeasty / leesy?

A

smells like yeast; from dead yeast cells being in contact with the wine for too long.

27
Q

What does it mean if a wine is reductive?

A

generic term. Could results of ‘lack of oxygen’, rotten eggs, garlick, struck matches

SWE Study Guide (4 decks)

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