HOMEBREW Digest #4975 Fri 17 March 2006

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  Re: beer in Puerto Rico (Rod Prather)
  Oxygen absorbing caps ("Peed, John")
  oxygen absorbing caps (Andrew Kligerman)
  Fwd: Re: Re: Oxygen absorbing caps ("John Mealey")
  Lamarck (Kurt Thorn)
  Re: beer in Puerto Rico (lyona)
  puerto rico beer and oxy caps (Aaron Martin Linder)

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---------------------------------------------------------------------- Date: Fri, 17 Mar 2006 07:25:00 -0500 From: Rod Prather <rodpr at comcast.net> Subject: Re: beer in Puerto Rico Peter, I don't know about Puerto Rico, but I travel extensively. I follow this tried and true rule. When in Rome, do as the Romans do. Then go to the rum. In other words, Try the beer if you like. But the RUM is the local drink. From: "Peter A. Ensminger" <ensmingr at twcny.rr.com> Greetings! I am traveling to Puerto Rico in a few months. Any beer recommendations from the HBD collective? Or should I just stick with the rum? Cheerio! Peter A. Ensminger > > > > > - -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.2.3/281 - Release Date: 3/14/2006 Return to table of contents
Date: Fri, 17 Mar 2006 06:22:12 -0800 From: "Peed, John" <jpeed at elotouch.com> Subject: Oxygen absorbing caps The oxygen-absorbing caps are activated when they get wet. Presumably, if you store them in a plastic bag in a dry place, they stay inactive. Also, presumably, you need to tip the bottle to wet the cap after applying it. John Peed Oak Ridge, TN Return to table of contents
Date: Fri, 17 Mar 2006 07:22:27 -0800 (PST) From: Andrew Kligerman <homebre973 at yahoo.com> Subject: oxygen absorbing caps If I remember correctly, these caps were developed as a by-product of trying to invent an artificial lung for scuba diving at the Duke Marine Lab. It either involved artificial hemoglobin that would bind oxygen or some membrane setup. My memory may be faulty from too much beer consumption! Andy in Hillsborough Return to table of contents
Date: Fri, 17 Mar 2006 09:27:01 -0700 From: "John Mealey" <mealey at gw.grand.k12.ut.us> Subject: Fwd: Re: Re: Oxygen absorbing caps Fred Johnson said: Thanks to those who responded ... "I still don't know the mechanism or capacity of these caps. How can these possibly be effective for any length of time if they are exposed to air?" Regarding the mechanism and capacity of these caps, here's what Paddock Wood Brewing says at their site in their "Ask the Brewmaster" Q and A section: http://www.paddockwood.com "Yes, Oxygen Absorbing crown caps really do work. Over a 6 month period a typical crown cap will allow approximately 1500ppb of O2 to enter the bottle. Bottles with more than 600ppb O2 will show definite signs of staling in 6 months. The Oxygen cap limits the O2 ingress to approx. 125ppb over the same 6 month period (at 24DegC). (Data from the Proceedings of the European Brewing Convention held in Oslo 1993, pg 654)." According to this, the staling problem isn't as much from residual oxygen in the solution but , rather, oxygen slipping past the caps. He also says: "Oxygen and temperature are the crucial factors which limit the shelf-life of beer, in other words, beer will oxidize more rapidly as storage temperature increases. So keep your finished beer cool, and the cooler the better, but don't freeze it. Reduce the amount of oxygen trapped in the bottle when filling, and consider Oxy-Caps if you plan on storing the beer for more than 6 months. How they keep from becoming saturated during storage, I don't know. I've never used them. They sell these caps on their site. Hope this is helpful. John Return to table of contents
Date: Fri, 17 Mar 2006 11:37:44 -0500 From: Kurt Thorn <Kthorn at CGR.Harvard.edu> Subject: Lamarck Steve gives a nice history lesson about Lamarck and Darwin but he's somewhat incorrect in ruling out Lamarckian inheritance: > Some HBers seem to believe in Lamarkism in the sense that they believe > that if they are brewing a big beer they think the starter should be high > gravity too. If they will ferment cold, then they make the starter cold > too. It's nonsense of course. > The only inheritable asset are the parts of the parent cell passed to the > daughter at division. When a yeast cell divides, the mother and daughter cell split the cellular contents equally. This means that they get equal shares of not only the DNA but also of all the enzymes and so on. So if your parent is adapted for high gravity or cold and has expressed certain proteins to enable that adaptation, the daughter cell will get them as well. Of course if the daughter doesn't continue to express those proteins, they'll disappear in a few generations. One way that disappearance can be prevented is if there is positive feedback from the end product promoting its own synthesis. This is known to occur in some cases. There are other mechanisms for non-genetic inheritance (collectively known as epigenetic mechanisms). In yeast one of the most famous of these is prion inheritance - there are a few yeast prions that are highly heritable. The other main mechanism of epigenetic inheritance is due to modifications of the histone proteins that package up DNA. While all these are possible mechanisms of epigenetic inheritance, it's still not known how important they are in actually transmitting information between generations. (I work next to someone who works on epigenetic inheritance in yeast, hence this message.) Kurt Return to table of contents
Date: Fri, 17 Mar 2006 11:47:56 -0500 From: lyona at umich.edu Subject: Re: beer in Puerto Rico > I am traveling to Puerto Rico in a few months. Any beer recommendations > from the HBD collective? Or should I just stick with the rum? I was in Puerto Rico about three years ago and went to the worst brewery I've ever visited. They seemed to be pursuing a wide range of light, flavorless beers and had their air conditioning up WAY too high. It was called Borinquen Grill & Brewing Company and was located right near the beach in New San Juan. I would not recommend it to anyone...ever. Beeradvocate.com lists another brewery now, Old Harbor Brewery, Steak & Lobster House. I don't think it was there when I visited, but it's in Old San Juan (a much nicer area to walk around, by the way). Anyway, it can't be as bad as Borinquen, which might even be closed now. If you have the opportunity, you can check out the Bacardi distillery. The tour was interesting at times and you get a few free drinks at the end. Also, try to check out the rainforest (El Yunque) if you get an opportunity. Enjoy! -Aaron Return to table of contents
Date: Fri, 17 Mar 2006 12:24:33 -0500 (EST) From: Aaron Martin Linder <lindera at umich.edu> Subject: puerto rico beer and oxy caps > > I am traveling to Puerto Rico in a few months. Any beer recommendations > from the HBD collective? Or should I just stick with the rum? > > From: "Spencer W. Thomas" <spencer at spencerwthomas.com> > Subject: Beer in PR > > Stick with the rum. > my lab mate is from puerto rico, and he recommends a brewpub in san juan if you will be there(i assume you will be there for at least awhile). It might have some flavorful beers. All of the rest of it is uninteresting. maybe hotter climates correlate with diminishing beer flavor? WRT oxy caps. I don't know how they work, but i'd like to have an "oxy plate" in my keg to absorb free oxygen if possible, that would be great. just try bottling a few bottles with and without the oxy caps and you will be able to tell the difference in a few-several months. they work. Return to table of contents
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