|
| |
| | Fermented and vegetables. A global perspective. Chapter 5. |
 | | This diversity makes them very adaptable to a range of conditions and is largely responsible for their success in acid food fermentations. | | | Normal conditions required for this pathway are excess sugar and limited oxygen. | | | During fermentation, visible changes take place which are important in judging the progress of the process. |
|
http://www.fao.org/docrep/x0560e/x0560e10.htm
(5720 words)
|
|
| |
| | Background Information The lactic Acid Bacteria |
| | They are, however, selectively utilized by intestinal lactic acid bacteria, especially bifidobacteria, thereby enhancing the healthful effects of these beneficial intestinal flora | | | It has been observed that the diet of the host influences the nature and levels of beneficial intestinal microflora, such as lactobacilli. | | | The species which have been therapeutically used are : |
|
http://www.lactospore.com/back.htm
(880 words)
|
|
| |
| | WINE BUSINESS MONTHLY |
| | Experiments in our laboratory and under commercial conditions have shown this to be an important factor in determining the success or failure of a treatment for stuck fermentation. | | | We have tried to emulate commercial fermentation conditions as closely as is possible in a laboratory environment, but these experiments should be replicated on a larger scale to determine if the observations made here can be adopted in a winery situation. | | | We found that the concentration of ethanol at the end of the experiment was similar between strains, and was not related to the initial concentration of acetic acid in the ferment. |
|
http://www.winebusiness.com/html/MonthlyArticle.cfm?AId=43531&issueId=43490
(3052 words)
|
|
| |
| | article content |
| | The clarification of white must in particular before fermentation is a practice that is generally used in the winemaking process. | | | This condition is reversed when the bacteria re-enter the active growth phase under more favourable conditions, allowing them to be retained by the filter (Millet and Lonvaud-Funel, 2000). | | | Acetic acid bacteria were detected two weeks after the treatment of the staves with SO These authors also treated the staves with potassium carbonate, chlorine and hot water. |
|
http://www.newworldwinemaker.com/article_content.asp?id=49
(3199 words)
|
|
| |
| | Dorlands Medical Dictionary |
| | The organisms are found in the intestines of pigs. | | | [schwa]-m[imacr]d) [USP] a carbonic anhydrase inhibitor with a wide variety of uses, including adjunctive treatment of glaucoma and epilepsy, treatment of familial periodic paralysis, prophylaxis and treatment of acute mountain sickness, and as a urinary alkalizer in the prophylaxis and treatment of uric acid renal calculi; administered orally, intravenously, and intramuscularly. | | | o-fen) [USP] the amide of acetic acid and p-aminophenol; a nonprescription drug having analgesic and antipyretic effects similar to aspirin but only weak anti-inflammatory effects. |
|
http://www.mercksource.com/pp/us/cns/cns_hl_dorlands.jspzQzpgzEzzSzppdocszSzuszSzcommonzSzdorlandszSzdorlandzSzdmd_a_06zPzhtm
(1630 words)
|
|
| |
| | Let the yeast do the work for you: Less alcohol per bottle |
| | During this ongoing study, we have attempted to genetically enhance a yeast strain from Saccharomyces cerevisiae to reach this goal. | | | Using molecular biology techniques, the Aspergillus niger glucose oxidase gene was successfully integrated into a Saccharomyces cerevisiae (laboratory strain) genome. | | | The hydrogen peroxide that is produced leads to hyperbaric oxygen toxicity - a result of the peroxidation of the membrane lipid - and a strong oxidising effect on the bacterial cell, which is the cause of the destruction of basic molecular structures, such as nucleic acids and cell proteins. |
|
http://www.wynboer.co.za/recentarticles/0406yeast.php3
(1094 words)
|
|
| |
| | IngentaConnect Application of molecular methods for the differentiation of aceti... |
| | Significance and Impact of the study: The availability of molecular techniques for a fast and reliable genotypic characterization should increase our knowledge of the ecology of acetic acid bacteria and determine more accurately their growth behaviour during various stages of vinification. | | | Conclusions: ERIC-PCR and REP-PCR techniques proved useful for characterizing strains of acetic acid bacteria. | | | Aims: To apply rapid and reliable molecular techniques for typing acetic acid bacteria and studying their population dynamics during wine-making processes. |
|
http://www.ingentaconnect.com/content/bsc/jam/2004/00000096/00000004/art00026
(338 words)
|
|
| |
| | New employment opportunities in fibre and food processing industries in Pakistan |
| | Food processing techniques are used for reducing the food borne diseases, attack of micro-organisms and to protect the health of consumers. | | | Some times irradiation, heat preservation and dehydration techniques are also used for processing and preservation purposes. | | | In food industries we use various industrial fermentations like, lactic acid bacteria, acetic acid bacteria, yeast with lactic and acetic acid bacteria. |
|
http://www.chemlin.de/publications/documents/fibre_and_foodprocessing.htm
(305 words)
|
|
| |
| | Acetic acid - Wikipedia, the free encyclopedia |
| | Acetic anhydride is also a reagent for the production of aspirin, heroin, and other compounds. | | | Prior to the commercialisation of the Monsanto process, most acetic acid was produced by oxidation of acetaldehyde. | | | Under similar conditions and using similar catalysts as are used for butane oxidation, acetaldehyde can be oxidised by the oxygen in air to produce acetic acid |
|
http://en.wikipedia.org/wiki/Acetic_acid
(3067 words)
|
|
| |
| | Articles |
| | During fermentation, however, all the SO2 should be bound to acetaldehyde, but the initial acetic acid bacteria population may be effectively reduced by SO2 applications before fermentation. | | | A high acetic acid bacteria population at the end of fermentation may also cause the winemaker a lot of grief. | | | High acetic acid bacteria numbers at the end of fermentation may be "transferred" to subsequent winemaking processes (5). |
|
http://www.wynboer.co.za/recentarticles/0501bacteria.php3
(1466 words)
|
|
| |
| | mrwizard - WineMaker Magazine: Killer Bacteria & pH: Wine Wizard |
| | Another and much easier way to de-acidify is to use a malolactic fermentation. | | | Tartaric acid is one of the naturally present grape acids, and is not consumed by yeast or by any other microorganism in the winemaking process. | | | All we can do is find ways to live with them. |
|
http://www.winemakermag.com/mrwizard/97.html
(2171 words)
|
|
| |
| | Acetic acid fumigation can prevent pear rots |
| | He said acetic acid could also be used with biological postharvest disease controls to reduce the disease pressure. | | | The Occupational Health and Safety Act (OSHA) has standards concerning the levels to which people may be exposed. | | | In tests comparing fumigation with acetic acid and treatment with the fungicide thiabendazole (TBZ), Sholberg found that both killed spores on the fruit, but only TBZ was effective against infections that had already begun. |
|
http://www.goodfruit.com/link/Nov-97/special8.html
(780 words)
|
|
| |
| | Chemical of the Week -- Acetic Acid and Acetic Anhydride |
| | Pure or concentrated solutions of acetic acid are very corrosive and can cause painful burns. | | | In its liquid or vapor state, acetic anhydride can irritate body tissues, possibly leading to the death of such tissue. | | | These bacteria require oxygen, and the overall chemical change is the reaction of ethanol with oxygen to form acetic acid and water. |
|
http://scifun.chem.wisc.edu/chemweek/AceticAcid/AceticAcid.html
(926 words)
|
|
| |
| | Background |
| | It is not necessarily restricted to only acetic acid bacteria that thermotolerant microorganisms are superior and much more useful in many respects to non-thermotolerant and developed by many other participants with different research subjects with different microorganisms in this core university program. | | | We were also responsible in Japan for the investigations of acetic acid bacteria. | | | The isolated strains were proved to be useful for saving expenses for energy and cooling water having a comparable efficiency to the current acetic acid bacteria which have been isolated from temperate areas and applied to practical uses. |
|
http://www.rdi.ku.ac.th/microbial/background_eng.html
(1472 words)
|
|
| |
| | Fermented and vegetables. A global perspective. Chapter 7. |
| | The traditional process may be improved by a two-stage fermentation in which alcohol is first formed by yeast (Saccharomyces cerevisiae) and the ‘must’ is then inoculated with acetic acid bacteria (Acetobacter pasteurianus). | | | It is mainly consumed by people in urban areas as a salad dressing and meat tenderiser, although it also has medicinal uses and is valued in certain rituals. | | | After fermentation, the vinegar must be stored in anaerobic conditions to prevent spoilage by the oxidation of acetic acid. |
|
http://www.fao.org/docrep/x0560E/x0560e12.htm
(3579 words)
|
|
| |
| | Memorandum on Cider |
| | Lactic acid is GRAS (Generally Recognized As Safe), and may prove to be an effective and "customer friendly" additive. | | | These microbes may survive in cider, but they will not grow. | | | Acetic acid bacteria only grow when oxygen is present. |
|
http://www.wisc.edu/foodsci/cider/inspect_mb.html
(1140 words)
|
|
| |
| | Acetic acid bacteria - Wikipedia, the free encyclopedia |
| | Other genera, such as Gluconobacter, doesn't further oxidize acetic acid, as it does not have a full set of Krebs cycle enzymes. | | | Other good sources are fresh apple cider and unpasteurized beer which has not been filter sterilized. | | | The acetic acid bacteria are found in nature where ethanol is being formed as a result of yeast fermentation of sugars and plant carbohydrates. |
|
http://www.wikipedia.org/wiki/Acetic_acid_bacteria
(212 words)
|
|
| |
| | Phytopathology: Indole-3-Acetic Acid-Producing Bacteria Are Associated with Cranberry Stem Gall |
| | Therefore, microbes were isolated on potato dextrose agar (Difco Laboratories, Becton Dickinson Microbiology Systems, Sparks, MD), Dl medium (18), and New and Kenmedium (27), which are favorable for Agrobacterium spp.; and Miller-Schroth medium (26), which is selective for Erwinia spp. | | | Russet on apple skin is characterized by abnormal proliferation of epidermal cells (3), presumably the result of IAA produced by E. herbicola and Pseudomonas spp. | | | There was a positive correlation between the ability of bacteria to produce IAA in vitro and cause galls. |
|
http://www.findarticles.com/p/articles/mi_qa4061/is_200411/ai_n9463372
(1172 words)
|
|
| |
| | Winetech |
| | Higher levels of acetic acid are normally produced under growth-limiting conditions and also at sugar concentrations over 20%. | | | The source(s) of these high acetic acid levels are unknown, as well as the role which acetic acid may play in the onset of a stuck fermentation. | | | Certain compounds (ammonium, glutamate, asparagine) inhibit the production of acetic acid when an ample supply of nitrogen is present whilst others such as methionine and valine can enhance the production of acetic acid. |
|
http://www.winetech.co.za/proj_iwbt111.php3
(477 words)
|
|
| |
| | Acetic acid shows promise for control of fruit decay |
| | Sholberg emphasized that although acetic acid fumigation could be a useful new technology, an integrated approach to controlling postharvest decay is essential. | | | Acetic acid occurs naturally in fruits, and is not considered a carcinogen. | | | Sholberg found that treatment with acetic acid worked as well as fumigation with sulfur dioxide for control of blue mold in table grapes. |
|
http://www.goodfruit.com/link/May1-98/and5.html
(202 words)
|
|
| |
| | Acetic Acid |
| | Acetic acid is also the predominant acid of what is referred to as volatile acidity. | | | The loss of grape berry skin integrity, through disease or physical damage, exposes grape juice to bacterial attack with the production of acetic acid. | | | Acetic acid is often, but not necessarily, accompanied by the negative aromas and taste of ethyll acetate (nail polish remover odour). |
|
http://www.monashscientific.com.au/AceticAcid.htm
(185 words)
|
|
| |
| | Volatile Acidity |
| | Yeast found in the vineyard—Kloeckera, Hansenula, and Metschnikowia—are able to produce large amounts of acetic acid and ethyl acetate early in a fermentation, but his generally occurs only with damaged grapes. | | | Acetic acid bacteria require oxygen to grow, therefore, elimination of any air in wine containers and sulfur dioxide addition will limit their growth. | | | The average level of acetic acid in a new dry table wine is less than 400 mg/L, though levels may range from undetectable up to 3g/L. legal limits of Volatile Acidity: |
|
http://waterhouse.ucdavis.edu/winecomp/va.htm
(448 words)
|
|
| |
| | Drink Recipes: Elderberry Wine 02 - by Recipe Cottage |
| | acetic acid, may cause the juice to become vinegar. | | | Fermentatation should take place at this heat too, an important | | | If this rule is not followed, bacteria, especially those which form |
|
http://www.recipecottage.com/drinks/elderberry-wine02.html
(213 words)
|
|
| |
| | Wine Education Topic: Volatile Acidity in Wine |
| | Membrane filtration, in which the wine is passed through a filter which has holes smaller than the acetic acid bacteria themselves, is particularly effective. | | | The bacteria enjoy living in wines that are both low in acidity and sulfur dioxide (sulfur dioxide is a common anti-microbial agent used in winemaking and it is least effective in low acid wines). | | | They were awful, but were also a great example of one of the most common winemaking faults, volatile acidity or VA. How dear dad went about it was a classic case study on how not to make wine. |
|
http://www.aromadictionary.com/articles/volatileacidity_article.html
(916 words)
|
|
| |
| | EPOB 3400 Microbiology Lecture 6 |
| | A good lab project would be to identify this organism and see what makes it float... | | | These are gram - bacteria with weird shapes (that increase their surface area) that also have unusual life cycles (see Figures 22.4 - 22.7). | | | All are heterotrophs and many are predatory bacteria.... |
|
http://spot.colorado.edu/~schmidts/Teaching/EPOB3400/micro6-2000.html
(426 words)
|
|
| |
| | Acetic acid bacteria -- Facts, Info, and Encyclopedia article |
| | Other genera, such as Gluconobacter, doesn't further oxidize acetic acid, as it does not have a full set of Krebs cycle enzymes. | | | Other good sources are fresh apple (A beverage made from juice pressed from apples) cider and (Click link for more info and facts about unpasteurized) unpasteurized (A general name for alcoholic beverages made by fermenting a cereal (or mixture of cereals) flavored with hops) beer which has not been filter sterilized. | | | (Sour-tasting liquid produced usually by oxidation of the alcohol in wine or cider and used as a condiment or food preservative) Vinegar is produced when acetic acid bacteria act on (A liquor or brew containing alcohol as the active agent) alcoholic beverages such as (Fermented juice (of grapes especially)) wine. |
|
http://www.absoluteastronomy.com/encyclopedia/a/ac/acetic_acid_bacteria.htm
(179 words)
|
|
| |
| | Microbes and food. Other fermented foods. |
| | First, yeast turns sugars into alcohol and then the alcohol is converted into acetic acid by bacteria. | | | Bacteria that break down pectin carry out the digestion in coffee, but the fermentation of cocoa beans is more complex and involves acetic acid bacteria and yeasts as well. | | | Microbes are used to break down this material and prepare the beans for roasting. |
|
http://www.schoolscience.co.uk/content/4/biology/sgm/sgmprods4.html
(214 words)
|
|
| |
| | Gluconacetobacter corrig |
| | In the List of Prokaryotic Names with Standing in Nomenclature, an arrow (--->) only indicates the sequence of valid publication of names and does not mean that the last name in the sequence must be used (see: Introduction). | | | The original spelling, Gluconoacetobacter (sic), has been corrected in accordance with Rule 61 on the occasion of validation. |
|
http://www.bacterio.cict.fr/g/gluconacetobacter.html
(932 words)
|
|
| |
| | Allrecipes Cook's Encyclopedia acetic acid |
| | [ a-SEE-tihk ] Acetic acid is formed when common airborne bacteria interact with the alcohol present in fermented solutions such as WINE, BEER or CIDER. | | | ALL RIGHTS RESERVED Copyright 2005 Allrecipes.com Please review our Legal Notice and Privacy Policy. | | | Acetic acid is the constituent that makes vinegar sour. |
|
http://allrecipes.com/advice/ref/ency/terms/4989.asp
(67 words)
|
|
| |
| | Wine (the only way to drink grape juice) |
| | Acetic acid bacteria are inhibited by an alcohol content >14-15 percent by volume, but deacidifying bacteria are strongly inhibited by approx. | | | (except molds, yeasts, acetic and lactic acid bacteria)
| | | Dry wines (<0.1% sugar) are rarely spoiled by bacteria, but 0.5 to 1.0% sugar favors spoilage. |
|
http://www.ag.uiuc.edu/~food-lab/wine/chemistry_files/slide0033.htm
(108 words)
|
|
|
