Household Bacteriology for Students in Domestic Science

Household Bacteriology for Students in Domestic Science

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 edition. Excerpt: ...that is, it gives the characteristic cellulose reaction, particularly in Bact. xylinoides. They can produce acids from many sugars, but develop best where it is possible to oxidize alcohol to acetic acid and water. In solutions deficient in alcohol but containing acetic acid, they carry the oxidation still further, transforming the acetic acid into carbon dioxide and water. The cells of Bact. xylinoides are 1.2-2/a X 0.8 Those of Bact. orleanense are somewhat Fig. 163. 1, Bacterium xylinoides from vinegar. 2, Bacterium orleanense, from vinegar, a, b, c, organisms from various culture media. (Adapted from Henneberg.) more slender, 1.6-2.4/u. X 0.3-0.4 The optimum temperature of fermentation lies at about 300 C. The minimum probably is about 100 C. Bacterium schiitzenbachi and several related species have been described as the common cause of acetic fermentation in the so-called quick vinegar process. It grows readily upon the ordinary culture media, but does not develop a coherent film upon the surface of liquids. In this respect it differs from the forms that have been previously described. It is therefore of no significance in the production of vinegar where film formation is an essential. The cells of the organism are usually oval or elongated, not infrequently sickle shaped or irregularly bent with rounded or pointed ends. They are usually in pairs, sometimes united in chains. Considerable differences may often be noted in the size and shape of the cells in the same chain. Involution forms, particularly curved rods, are not uncommon. These organisms develop in great numbers upon the beechwood shavings used in the quick vinegar process. The organism is relatively slender, 0.3-0.4/u. X 3-6 /u, . It does not give the cellulose reaction more

Product details

  • Paperback | 132 pages
  • 189 x 246 x 7mm | 249g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236499255
  • 9781236499257