Outlines of Bacteriology (technical and Agricultural)Longmans, Green and Company, 1909 - 262 páginas |
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activity aerobic alcohol ammonium anaerobic bacteria animals atmosphere Bacillus Bacterium beer Beggiatoa belonging butyric acid cause cells cent changes cheese chemical cilia cocci coli communis colouring matter conidia conidium contact beds containing cream cultivated decompose decomposition denitrification diastase disease effect endospores fact favourable fermentation form spores formation gelatine germination gram grow growth heat individuals inoculated iron-bacteria isolated kephir kinds known lactic acid lactic-acid bacteria large number leguminous plants liquid material membrane method microbe Micrococcus milk motile multiplication nature nitrates nitrite-bacteria nitrogen number of bacteria nutrient medium obtained organic matter oxidation oxygen Pastorianum pathogenic bacteria phosphorescence poison potassium present produced protoplasm pure culture putrefaction result ripening rods salt saprophytic Sarcina secreted sewage small quantities soil souring species Spirillaceae Spirillum spores stained starch sterilised substances sugar sulphate sulphur sulphur-bacteria sulphuretted hydrogen surface takes place temperature thread usually whilst wine yeast zoogloea
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Página ii - Crown 8vo., y. net. ^FRANKLAND. — MICRO-ORGANISMS IN WATER. Together with an Account of the Bacteriological Methods involved in their Investigation. Specially designed for the use of those connected with the Sanitary Aspects of WaterSupply. By PERCY FRANKLAND, Ph.D., B.Sc. (Lond.), FRS, and Mrs. PERCY FRANKLAND. With 2 Plates and Numerous Diagrams. 8vo.
Página 249 - ... justify their use, and lands which do not. " We are, however, forced to conclude that peat and stiff clay lands are generally unsuitable for the purification of sewage, that their use for this purpose is always attended with difficulty, and that where the depth of top soil is very small, say six inches or less, the area of such lands which would be required for efficient purification would in certain cases be so great as to render land treatment impracticable.
Página ii - THE MYCOLOGY OF THE MOUTH : a TextBook of Oral Bacteria. By KENNETH W. GOADBY, LDS (Eng.), DPH (Camb.), LRCP, MRCS, Bacteriologist and Lecturer on Bacteriology, National Dental Hospital, etc. With 82 Illustrations. 8vo., 8s.
Página 243 - The cream is torn or altogether dissociated by the development of gas, so that the surface of the medium is covered with stringy, pinkish-white masses of coagulated casein, enclosing a number of gas-bubbles.
Página 249 - We doubt if any land is entirely useless, but in the case of stiff clay and peat lands the power to purify sewage seems to depend on the depth of the top soil. There are, of course, numerous gradations in the depths of top soil which are met with in nature, and it is not easy to draw the line between lands which contain a sufficient depth to justify their use, and lands which do not. We are, however, forced...
Página 234 - It is felt that this is a step in the right direction, and it is hoped that others will be sufficiently interested to develop it still further.
Página 206 - Yoskida had shown that the production of lacquer varnish from the sap of the lac tree was dependent on an enzyme which brought about oxidation, and which he called laccase.
Página 252 - Closed septic tank and contact bed. (2) Open septic tank and contact beds. (3) Chemical treatment, subsidence tanks and contact beds. (4) Subsidence tanks and contact beds. (5) Contact beds alone. (6) Closed septic tank, followed by continuous filtration. (7) Open septic tank followed by continuous filtration. (8) Chemical treatment, subsidence tanks and continuous filtration. (9) Subsidence tanks and continuous filtration. (10) Continuous filtration alone.
Página 240 - Facultative anaerobes or aerobes : — B. putrificus coli, NL (decomposes albuminous substances with liberation of ammonia, whether air is present or not) . Spirillum plicatile, serpens, undula, tenue, and volutans. Vibrio saprophilus, aureus, flavus, flavescens, NL (in sewer mud).
Página 254 - The majority of trickling filters, however, are fed by what are known as " rotary sprinklers," consisting of pipes pivoted in the centre of the filter, and having perforations, on the opposite sides of the two arms, from which the effluent is showered on to the bed, the reaction of the liquid against the side of the pipe being utilised to rotate the sprinkler, after the fashion of a Barker's mill. As the sprinkler revolves, the points of impact of the jets are continually changed, tracing out on...