Search found 8 matches

by robert4136
Sun Feb 22, 2009 7:09 pm
Forum: BeerTools.com Online Tools
Topic: Tinseth Formula
Replies: 8
Views: 23916

perceived bitterness

one quick note before i try to gather some more info . I kinda have the same grip as bill, the concentration of isohumulone in the wort should be the amount of "IBUs" in the beer, however the International Bitterness Unit is not based on an actual concentration of anything in solution, It is a "perc...
by robert4136
Sat Feb 21, 2009 8:14 pm
Forum: BeerTools.com Online Tools
Topic: Tinseth Formula
Replies: 8
Views: 23916

thanks for the reply, i think im on to something, BTP is accounting for different grain bills, for instance a 1.061 wort of all crystal 60 will have a different calculated IBU than a wort of all 2 row, i am assuming the normal online and my excel calculators do not have this calculation built in. TH...
by robert4136
Sat Feb 21, 2009 9:57 am
Forum: BeerTools.com Online Tools
Topic: Tinseth Formula
Replies: 8
Views: 23916

Tinseth Formula

I have been experimenting recently with the different hop utilization formulas, particularly with the Tinseth formula. given a certain recipe, i get a different IBU using BeerTools set to tinseth , then when i use the formula calculated into an excel spread sheet/online calculator For instance 1.061...
by robert4136
Tue Jan 06, 2009 8:10 pm
Forum: Brewing Science
Topic: Fructose and yeast
Replies: 6
Views: 18695

one cool guy

you could say the smily face with the glasses is a "cool guy" and the one in front would read, Im one cool guy. ..........yeah
by robert4136
Mon Jan 05, 2009 10:33 pm
Forum: Brewing Science
Topic: Fructose and yeast
Replies: 6
Views: 18695

fructose

http://www.springerlink.com/content/x2458m74u2767718/

the abstract here say most yeasts are capable of fermenting fructose. The main end products should be the same although i would guess that there are different intermediates along the pathway to CO2 and ethanol.
by robert4136
Mon Jan 05, 2009 10:15 pm
Forum: Brewing Science
Topic: Totalizing gas meter source?
Replies: 5
Views: 17647

CO2 flow

are you just curious to see how vigorous your fermentation is at a given time? you can also estimate the total mass and volume of CO2 that has excaped based on the starting and finishing gravity.
by robert4136
Mon Jan 05, 2009 10:05 pm
Forum: Brewing Science
Topic: Engineering Natural carbonation
Replies: 3
Views: 12096

another thought

thinking about your carbonation experiments led me to an idea of sorts. Given the fact that Yeast is expelling CO2 out the fermenter and we let this happen until the yeast effectively stop fermenting. We then half to either prime and bottle to capture the right amount of CO2 or force carbonate with ...
by robert4136
Mon Jan 05, 2009 9:52 pm
Forum: Brewing Science
Topic: how long does it take for beer to "get" carbonated
Replies: 4
Views: 15147

atmospheres

an atmosphere (atm) is a unit of pressure just like pounds per square inch (PSI), an atmosphere is relative to the pressure of the earth's atmosphere at sea level at a standard temperature. With that said, the standard pressure of the earth's atmosphere is 1 atm. 1 atm = about 14.7 PSI.