ApolloSpeed

Recipes 

My WLP820 yeast asks for a yeast starter....but I only have Dextrose on hand. No DME or LME.


Will that be ok?

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david_42

Recipes 

If you have some yeast nutrient, otherwise it won't work. Pure sugar won't let the yeast grow, so it just ferments.

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s3n8

Recipes 

I would not use Dextrose in a starter. If you start the yeast out on Dextrose, they may not develop a taste for maltose.

Someone with more scientific knowledge should explain this better.

ChshreCat

Recipes 

Someone with more experience with starters can follow up and confirm this for me (or dispute it), but from what I understand it's not a good idea because you get the yeast geared toward eating the wrong type of sugar that way. Using DME, they're used to maltose when they get tossed into the wort.

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Beerrific

Recipes 

That's right. Within 1-2 generations the yeast will lose the ability to create the enzyme needed to ferment maltose.

s3n8

Recipes 

See, I knew someone would chime in with a better explanation.

giligson

Recipes 

They won't so much lose it as pack it away in the closet. Brewer's yeast actually have a variety of metabolic options based on the carbon source they are using. So you will get yeast growth and multiplication. And if you add yeast nutrient you will also get normal logarithmic growth with normal sized yeast. But when you switch their carbon source and they finish eating up all the easy glucose they will have to switch metabolic pathways to utilize the maltose (and trisaccharides for those yeasts capable). This may result in a sudden slowdown and possibly stuck fermentation (eg in say, a cold fermentation with a flocculent yeast)

slimer

Recipes 

Go get some Goya Malta and use it in a starter.

dagamore

Recipes 

anyone know the SG of Goya Malta?

found this here Malta - Non Alcoholic Malt Beverage from the Caribbean and Latin America - Ask The Beer Guy «
they say it should be near 1.040 perfect for a starter, but dont know if thats right. Will see if i can find some GoyaMalta and test it out.

ApolloSpeed

Recipes 

so basically.....used DME or LME...... or don't use a starter at all.

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