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New
Technical Quarterly Papers Published |
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"Identification of Microbial Populations Associated with Sorghum Fermentation," by E. D. Deenanath, S. E. Iyuke, and D. Lindsay, has been published in the MBAA
Technical Quarterly.
Abstract
This study reports on the isolation and identification of microbiological populations that are unique to the University of the Witwatersrand microbrewery plant during sorghum fermentation. For the fermentation procedure, the hydrolysate was propagated with either
Saccharomyces cerevisiae strain NRRL Y2084 or
Issatchenkia orientalis. Microbiological procedures such as plate counts and PCR were performed at the postmashing and postfermentation stages to detect the dominant microorganisms during sorghum processing when inoculated with starter cultures. Microbial isolates were characterized by sequencing and phylogenetic analysis. At the postmashing stage, no microbial contaminants were found to be associated with the process. At the postfermentation stage, plate counts showed microbial counts between 5.00 and 8.00 log CFU/mL. The characterization of microbes isolated at the postfermentation stage was based on PCR amplification of the 16S and internal transcribed spacer (ITS) regions. Sequencing results identified the isolates as
Lactococcus lactis, Lactococcus garvieae, Lactobacillus casei, Enterococcus faecalis, Saccharomyces cerevisiae strains NCL117 and T8,
Saccharomyces paradoxus, Saccharomyces pastorianus, Saccharomyces kudriavzevii, Issatchenkia orientalis, and
Candida inconspicua.
"The Enzymology of Cell Wall Breakdown During Malting and Mashing: An Overview," by C. W. Bamforth, has been published in the MBAA Technical Quarterly.
Abstract
Enzymolysis of the cell walls of the starchy endosperm of barley can be considered a two-stage process: solubilization and polymer digestion. Solubilase enzymes include not only carboxypeptidase acting as an esterase, but also other enzymes, notably an early-developing xylanase. It is supposed that pentosan is primarily located on the outside of the cell wall. Nonetheless, pentosan is less efficiently degraded than
b-glucan, probably because the chief xylanases are blocked by an endogenous inhibitor. Although there can be very efficient depolymerization of
b-glucan, it appears that degradation is incomplete and that the primary hydrolysis products are
b-linked oligosaccharides. This is likely because the exo-glucanases that hydrolyze them develop late in germination and also have a very low affinity for their substrates. The advantage of this for the brewer is that beer can be legitimately claimed as a good source of putative prebiotics.
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MBAA Technical Director Notes
2010
MBAA Brewery Packaging Technology Course
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 The 2010 MBAA Brewery Packaging Technology Course is in full swing, with a full-house of 50 attendees. We toured the New Glarus brewery this past Saturday, and brewmaster and brewery owner Dan Carey hosted one of the tour groups. Attendee Jim Maliziola (MillerCoors) led one of the group discussions.
Read
more...
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District New England to Hold Spring Meeting |
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MBAA
District New England is holding its spring meeting at Cape Cod Beer (1336 Phinneys Lane, Hyannis, MA) on Friday, March 19, from 3:30 p.m. to approximately 7:00 p.m. The technical program will consist of a panel discussion featuring brewery representatives Aaron Mateychuck (Watch City Brewing) and Liz Melby (Harpoon) and media representatives Kerry Byrne (Boston Herald), Andy Crouch, and Todd Alstrom. The discussion will be on methods of using the media to establish and grow direct customer relationships for small brewers.
Dinner will be provided by Todd and Beth Marcus, owners of Cape Cod Beer. Please RSVP to Judy Nadeau ASAP at
mailto:judy@crosby-baker.com.
—Judy Nadeau
District Secretary
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District New York to Hold Meeting at Brooklyn Brewery |
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MBAA
District New York is pleased to announce that it will hold an extraordinary meeting on Monday, March 22, at the Brooklyn Brewery in New York City. This will be a fascinating evening, spent with several international brewers and their unique beers. Dinner will be catered by the famous Blue Ribbon restaurant group. Those who are on a roll can head next door for Brooklyn Bowl bowling, music, and more good pints.
For more information, contact
Rich Ellis.
—Rich Ellis
District BOG Representative
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District Ontario Holds Brewing Fundamentals Seminar |
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 MBAA
District Ontario offered another successful Brewing Fundamentals Seminar as part of the newly renamed Ontario Technical Conference. This year's presentations focused on mashing and starch conversion as a continuation of last year's focus on milling and wort separation.
Read more...
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District Ontario Announces Annual Educational Scholarship |
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MBAA District Ontario is proud to announce the 2010 recipient of its annual Educational Scholarship. The scholarship is made possible by the generosity of our allied trade members who support the educational mission of the Master Brewers Association of the Americas.
Read more...
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District Philadelphia Announces Upcoming Meeting |
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Join District Philadelphia April 16, 2010, at the Boston Beer Company in Fogelsville, PA. Hospitality and plant tours start at 4:00 p.m. Dinner can be purchased for $30 and begins at 6:00 p.m. Technical presentations following dinner include
"Brewhouse Material Efficiency" by Phil Davidson (brewer, Yuengling Brewery) and
"Packaging Line Design/Troubleshooting: Conveyer Line Speed Calculations" by Dan Holmes (packaging manager, Yuengling Brewery). For more information and to RSVP, visit the
District Philadelphia website.
—Rich Wagner
District Secretary/Membership Chair
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District St Louis to Hold Meeting at Sage Bistro |
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MBAA District St. Louis will hold its regular monthly meeting this evening, Thursday, March 18, at Sage Bistro in the shadow of the Anheuser-Busch St. Louis brewery. Rob Naylor (Anheuser-Busch) will be confirmed as our new District secretary, a position recently vacated due to a resignation. The dinner presentation will be given by Gordon Gosejohan (DSI Process Systems) on the history and manufacturing techniques of sanitary process fittings and equipment used in the food, beverage, and pharmaceutical industries. For those considering applying for the District scholarships, applications must be submitted by April 30. Details and qualification requirements are posted on the
District St. Louis website.
—Steve Huffman
District Publicity Chair
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