HOMEBREW Digest #5194 Mon 11 June 2007


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	FORUM ON BEER, HOMEBREWING, AND RELATED ISSUES
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Contents:
  British pint vs. American pint vs. Syracuse pint (Wes Smith)
  2007 BUZZ Off Results! ("Christopher Clair")
  Re: British pint vs. American pint vs. Syracuse pint ("Greg 'groggy' Lehey")
  Re: British pint vs. American pint vs. Syracuse pint ("Peter A. Ensminger")
  Re: British pint vs. American pint vs. Syracuse pint ("Greg 'groggy' Lehey")
  re: olive oil ("-s@adelphia.net")
  more beer measures ... ("Peter A. Ensminger")
  re: olive oil/revision ("steve.alexander")

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---------------------------------------------------------------------- Date: Sat, 09 Jun 2007 13:41:50 +1000 From: Wes Smith <wessmith at ozemail.com.au> Subject: British pint vs. American pint vs. Syracuse pint Peter Ensminger makes a good explanation of the old English "Imperial" system. Just one small point Peter - an Imperial pint is 20 Imperial ounces. 1 Imp gallon = 8 Imp pints = 160 Imp ounces = 4.546 ltrs 1 Imp ounce = 28.4125 ml Its been so long I had to go and look it up! Cheers, Wes "In Britain, a pint of beer (or cider or perry) is an "imperial pint", which is 568.26125 mL (=19.2 fluid ounces). Apparently, the British government declared that an "imperial gallon" of water weighs 10 lbs at 62 deg F and the "imperial pint" is 1/8 of an "imperial gallon"." Return to table of contents
Date: Sun, 10 Jun 2007 16:51:02 -0400 From: "Christopher Clair" <buzzclub at verizon.net> Subject: 2007 BUZZ Off Results! It is with great pleasure that I can announce the results of the 14th Annual BUZZ Off homebrew competition! The BUZZ Off was held on June 9th at Iron Hill Brewery & Restaurant in West Chester, PA. We had 269 entries from around the country competing in 25 judging categories. Congratulations to Ed Bielaus for his Best of Show winning Premium American Lager! For complete results, please visit our website http://hbd.org/buzz. Please allow me a few days to compile MCAB qualifiers. Score sheets, ribbons and prizes should go out within the next week and a half. I also want to thank all the judges and stewards for giving their time on Sat. and our generous prize sponsors. Without these people, the BUZZ Off would not be possible. Finally, I want to give a special thank you to Chris LaPierre and the entire staff at Iron Hill Brewery & Restaurant for hosting us (both the BUZZ Off and our monthly meetings). Their generosity towards home brewers is unmatched and greatly appreciated. Christopher Clair, 2007 BUZZ Organizer buzzclub at verizon.net http://hbd.org/buzz Return to table of contents
Date: Mon, 11 Jun 2007 10:15:19 +0930 From: "Greg 'groggy' Lehey" <grog at lemis.com> Subject: Re: British pint vs. American pint vs. Syracuse pint On Friday, 8 June 2007 at 1:29:46 -0400, Peter A. Ensminger wrote: > Some discussion in another listserv inspired me to look up the value of > an "Imperial pint", a unit of measure in Great Britain. > > In Britain, a pint of beer (or cider or perry) is an "imperial pint", > which is 568.26125 mL (=19.2 fluid ounces). Where do you get this from? An Imperial pint is 20 Imperial fluid ounces. > Apparently, the British government declared that an "imperial > gallon" of water weighs 10 lbs at 62 deg F and the "imperial pint" > is 1/8 of an "imperial gallon". Well, it's not a sudden declaration; it's been that way for a very long time. > However! You will often see that cans of beer in Britain contain 500 mL. > This is known as the "metric pint". > > See: http://www.opsi.gov.uk/si/si1995/Uksi_19951804_en_2.htm This confirms my statement (1 pint is 20 floz). It doesn't mention "metric pints". Where did you get that from? Greg - -- Finger grog at lemis.com for PGP public key. See complete headers for address and phone numbers. Return to table of contents
Date: Mon, 11 Jun 2007 00:06:49 -0400 From: "Peter A. Ensminger" <ensmingr at twcny.rr.com> Subject: Re: British pint vs. American pint vs. Syracuse pint Greetings! Regarding my post at: http://www.hbd.org/hbd/archive/5193.html#5193-1 ... A British Government web site, http://www.opsi.gov.uk/si/si1995/Uksi_19951804_en_2.htm , is the source for my information: 1 imp pint = 568.26125 mL, for beer, cider, or perry. Type "568.26125 mL in ounces" into Google, and you get "19.2151987 US fluid ounces". Sorry that I did not specify in my previous post that I was talking about "US" fluid ounces. Type "568.26125 mL in imperial ounces" into Google and you get "19.9999917 (=20) Imperial fluid ounces", which is what Greg says. Type "500 mL in ounces" into Google and you get "16.9070113 US fluid ounces". This is the "metric pint" or "short pint". See: http://en.wikipedia.org/wiki/Pint (or http://de.wikipedia.org/wiki/Pinte for speakers of German). Now for you Germans and Austrians: How much is a "Mass" (Ma-'scharfes s'). One liter? Why not just call it a liter? Cheers! Peter A. Ensminger Syracuse, NY Apparent Rennerian: [394, 79.9] Return to table of contents
Date: Mon, 11 Jun 2007 15:28:50 +0930 From: "Greg 'groggy' Lehey" <craftbrewer at lemis.com> Subject: Re: British pint vs. American pint vs. Syracuse pint On Monday, 11 June 2007 at 0:17:49 -0400, peter ensminger wrote: Only to me, but it's fairly clear from the content that you meant to send it to the list, so I'm following up there. > On Monday, 11 June 2007 at 10:15:19 +0930, Greg Lehey wrote: >> On Friday, 8 June 2007 at 1:29:46 -0400, Peter A. Ensminger wrote: >>> Some discussion in another listserv inspired me to look up the value of >>> an "Imperial pint", a unit of measure in Great Britain. >>> >>> In Britain, a pint of beer (or cider or perry) is an "imperial pint", >>> which is 568.26125 mL (=19.2 fluid ounces). >> >> Where do you get this from? An Imperial pint is 20 Imperial fluid >> ounces. >> >>> However! You will often see that cans of beer in Britain contain 500 mL. >>> This is known as the "metric pint". >>> >>> See: http://www.opsi.gov.uk/si/si1995/Uksi_19951804_en_2.htm >> >> This confirms my statement (1 pint is 20 floz). It doesn't mention >> "metric pints". Where did you get that from? > > A British Government web site, > http://www.opsi.gov.uk/si/si1995/Uksi_19951804_en_2.htm , is the > source for my information: 1 imp pint = 568.26125 mL, for beer, cider, > or perry. > > Type "568.26125 mL in ounces" into Google, and you get "19.2151987 US > fluid ounces". Sorry that I did not specify in my previous post that I > was talking about "US" fluid ounces. That's *very* confusing! But then, all these archaic measures are. > Now for you Germans and Austrians: How much is a "Mass" > (Ma-'scharfes s'). One liter? Why not just call it a liter? Because it wasn't, at least originally. The word Ma&szlig; (sorry, not allowed to use German characters on this list, but if you're reading mail with a web browser it might even display correctly) is not the same word as Mass. It's a German word meaning, amongst other things, "measure". You can see how it could be applied to beer. Wiki refers to the general term at http://de.wikipedia.org/wiki/Ma%C3%9F and the beer mug at http://de.wikipedia.org/wiki/Ma%C3%9Fkrug . There you will see that it bears very much the same relationship to the litre as the Imperial pint does to the "metric pint" that you mention: it's archaic and slightly larger. Specifically, it used to be 1.069 litres, slightly less than an Imperial quart. Another unit of measure, like the Ma&szlig; mentioned in the Reinheitsgebot, is the Kopf ("head"). That's a little smaller, but I haven't found any indication how much less. I've taken a look through Wikipedia and I see that there's a mention of metric pints there; there's no reference to the legality of doing so. Here in South Australia the "pints" are smaller; http://en.wikipedia.org/wiki/Pint tells me that they're 425 ml. To add to the fun, look at the French wikipedia page, http://fr.wikipedia.org/wiki/Pinte . There you can read: Parisian pint 952.146 ml Canadian (qu&eacute;becois?) pint 1,136.5225 ml US dry pint 550.61 ml I suppose it's also worth knowing that the word "pound" is still in use in Germany and, to a lesser extent, in France. In each case it represents 500 g and was declared so during the 19th century by a law which was later repealed. Greg - -- Finger craftbrewer at lemis.com for PGP public key. See complete headers for address and phone numbers. Return to table of contents
Date: Mon, 11 Jun 2007 05:20:28 -0400 From: "-s at adelphia.net" <-s@adelphia.net> Subject: re: olive oil Back to the question of adding olive oil (or others) to wort to enhance yeast performance. Abbreviations, notation: FA - fatty acids SFA - saturated FAs UFA - unsaturated FAs MUFA -mono-nusaturated FAs (one point of desaturation) PUFA - poly-unsaturated FAs (two or more points of desaturation) C18 - a notation for a SFA with 18 carbons (stearic) C18:2 - notation for a PUFA with 18 carbons and 2 points of desaturation. The common saturated fatty acids are C12 (lauric), C14 (myristic), C16 (palmitic), C18 (stearic) and C20 arachidic). Some common UFAs are C18:1 oleic (9-octadecenoic), C18:2 linoleic (9,12-octadecadienoic), C18:3 linolenic. To re-iterate the background. Yeast (and in fact all cell membranes) require sterols and UFA, and oxygen is necessary to make sterol from squalene precursor and to make UFAs from SFAs. Yeast in brewery fermentation do not have access to oxygen after the first few hours(at most), so their supply of sterol & UFA is restricted. Yeast are capable of extracting and using UFAs and sterol from wort and incorporating these intheir cell membranes. The mechanism (and yes they can use n-acyl-glycerides) is documented in the literature. This uptake of fermenter lipids is one reported cause of improved yeast performance in trubby wort. Many reports exist that indicate that addition of UFAs and sterols to wort improve yeast performance. Of course any excess lipids that remain in the finished beer detract from head retention and are potential staling/oxidation problems. Olive oil consist of about 14% SFAs, 73% MUFAs and 11% PUFAs. (As a side note, the 11% PUFA consist of abt 91% omega-6, and 7% omega-3 PUFAs). Of course the majority of these fatty acids appear in the form of triacyl-glycerices and diacyl-glycerides; fats. These can be thought of as two or 3 fatty acids connected together by a glycerol(glycerine) molecule. Olive oil is a very simple extraction from olives, so it should be no surprise that it contains other things. Phenolic antioxidants keep olive oil fresh. Squalene (a sterol precursor) at ~0.7%, and ~0.2% plant sterols, and smaller amounts of vitamin A, E & K. Some small amounts of simple organic acids &minerals. The characteristic aroma/flavor of olive oils is likely due to tiny amounts of isoprenoid(terpene) compounds (also related to sterol metabolism). Briefly note that clear all-malt sweet wort contains ~32mg/L of palmitic(C16) and ~35mg/L linoleic(C18:2), ~3mg/L of stearic(C18) and only minor amounts of others FAs and 0.1mg/L sterols. After the boil the concentration of fatty acids is reduced by roughly a factor of 10 (FAs are lost in the break). Several sources inducate that finished wort contains ~5-7mg/L total fatty acids (0.1gm-0.14gm/5gal). Yeast/wort/beer - A yeast cell has a dry weight of ~40 pico-gm. Conventional beer pitching rates are ~9 million cells/ml for ale and ~20mill/ml for lager (assuming ~12P wort) . The final yeast population reaches about 80-100mill/ml in both cases. So in a 5gal(20l) fermenter we end up with about 2 trillion cells, 75-90% of which are new. The pitched dry yeast cell mass is 7-15grams/5gal and the final dry yeast mass is about 65-80 grams. Yeast cells in peak condition have have 10% lipids total including 1-1.2%sterols (similar to levels at the end of the aerobic phase). At low or repressed growth rates yeast can reach 2.5-6% sterols (and I suspect this is what the dried yeast are at). At the end of normal anaerobic fermentation yeast drop to about 0.1% sterols, which is minimal and prevents cell reproduction. Yeast FAs follow a similar trajectory as sterols. Peaking at up to 15% FAs (as a % of dry mass) but dropping to around 3% at the end of a normal brewery fermentation. The UFAs peak at around 50% of the total FAs around 5 hours into the fermentation, but drop to about 20-25% by the end of fermentation. A finished 5gal fermenter thus contains about 80 grams (dry weight) of yeast containing ~0.1 gram of sterol and 2.4gm of fatty acids (0.6gm as UFAs), but the same yeast would be far better off with about 1 gram of sterols and 8 grams of FAs. Also note that malt and olive oil contain only ~0.1% - 0.2% plant sterols as a fraction of lipids, while yeast contain a much higher sterol level at 1%-10% sterol as a fraction of total lipids. So you can't practically M&Bs (1982 2nd ed, pp 646) reports that addition of "as low as" 5 u-gm/ml of sterols or UFAs have an impact. This is equivalent to 0.1 grams of UFA per 5 gallon or about 0.12ml of oil/5gal. Much larger amounts can be consumed by yeast. Note that this "as low as" amount is still 1440 times greater than Matt Baum reported (0.0000833mL/5gal), so there is something fundamentally wrong with the figures in the note he reported. One most relevant study [Taylor, Thurston & Kirsop, "The Influence of Lipids Derived from Malt Spent Grains on Yeast Metabolism & Fermentation", JIB v85 pp219-227] adds lipids from spent malt to conventional wort and notes the impact on fermentation & yeast. Adding 300mg/L (!!! 15 GRAMS of oil per 5 gallons !!). This particular lipid extract included ~60% triacylglycerides and a very high 10% plant sterols. The beer resulting from the lipid enhanced wort had LOWER final FA content as well as lower esters and fusels. The yeast retained much of the PUFAs introduced, but very little of the SFAs.Some fats(triacylglycerides) were incorporates into the yeast, but at a lower rate than the free fatty acids. One important note - the addition of these lipids to de-oxygenated wort did allow for complete fermentation, but the yeast growth was about half of normal and the fermentation was very slow. Personally I wouldn't add 3 or 4 tablespoons of vegie oil to my fermenter (~15gm/5gal) but apparently it's possible to do this without negative effects on the final beer ! So there you have it - adding something between 0.1gm to 15gm of lipids/5gal can improve the fermentation. Of course the addition of UFAs reduces the oxygen required, but still a little O2 is needed for sterol production. -S Return to table of contents
Date: Mon, 11 Jun 2007 10:09:27 -0400 From: "Peter A. Ensminger" <ensmingr at twcny.rr.com> Subject: more beer measures ... Greg provides some more interesting info on beer measures. For non-German speakers, see: http://en.wikipedia.org/wiki/Ma%C3%9F The German wikipedia provides a huge list of beer measures here: http://de.wikipedia.org/wiki/Bierma%C3%9Fe Cheers! Peter A. Ensminger Syracuse, NY Apparent Rennerian: [394, 79.9] Return to table of contents
Date: Mon, 11 Jun 2007 11:50:53 -0400 From: "steve.alexander" <steve-alexander at adelphia.net> Subject: re: olive oil/revision janitor at hbd.org wrote: > Suggestion from the Janitors: > ======================================================================= > You've got an incomplete sentence/paragraph: > > .. yeast contain a much higher > sterol level at 1%-10% sterol as a fraction of total lipids. So you > can't practically > Proofreaders yet ! Oops - the price of re-editing. The notion is that you can't practically use conventional oils to supply sufficient (plant) sterol for yeast growth simple plants generally have much lower sterol:FA ratio than yeast. Also, the mix of sterols in yeast membrane impacts fermentation performance (which could be why the malt lipid additions where not a good substitute for oxygen). -S Return to table of contents
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