Dental Materia Medica, Therapeutics and Prescription Writing

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Lea & Febiger, 1909 - 295 pages

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Page 82 - Trioxide and occurs as a heavy solid occurring either as an opaque, white powder, or in irregular masses of two varieties : one, amorphous, transparent, and colorless, like glass ; the other, crystalline, opaque, and white, resembling porcelain. Frequently the same piece has an opaque, white, outer i-riLst enclosing the glassy variety. Contact with moist air gradually changes the glassy into the white, opaque variety. Both are odorless and tasteless.
Page 127 - Against dry bacteria, absolute alcohol and ordinary commercial alcohol are wholly devoid of bactericidal power, even with twenty-four hours' direct contact; and other preparations of alcohol containing more than 70 per cent., by volume, are weak in this regard, according to their content of alcohol; the stronger in alcohol, the weaker in action. " 2. Against the commoner, non-sporing, pathogenic bacteria in a moist condition, any strength of alcohol above 40 per cent., by volume, is effective within...
Page 127 - ... (2) Against the commoner, non-sporing pathogenic bacteria in a moist condition, any strength of alcohol above 40 per cent., by volume, is effective within five minutes, and certain preparations within one minute. "(3) Alcohol of less than 40 per cent, strength is too slow in action or too uncertain in results against pathogenic bacteria, whether moist or dry. "(4) The...
Page 128 - ... (6) The stronger preparations of alcohol possess no advantage over 60 to 70 per cent, preparations, even when the bacteria are moist; therefore, and since they are inert against dry bacteria, they should not be employed at all as a means of securing an aseptic condition of the skin.
Page 127 - ... (4) The most effective dilutions of alcohol against the strongly resistant (non-sporing) bacteria, such as the pus organisms, in the dry state, are those containing from 60 to 70 per cent. by volume, which strengths are equally efficient against the same organisms in a moist condition. "(5) Unless the bacterial envelope contains a certain amount of moisture, it is impervious to strong alcohol; but dried bacteria, when brought into contact with dilute alcohol containing from 30 to 60 per cent....
Page 82 - Trioxide is but sparingly soluble, but it is soluble in about 5 parts of glycerin. Oil of turpentine dissolves only the glassy variety. Both varieties are freely soluble in hydrochloric acid, and in solutions of alkali hydroxides and carbonates.
Page 168 - ... flexion. The head is dependent, the free margins of the costal cartilages are as prominent as they can be made. The epigastrium being the highest point, the diaphragm is neither embarrassed from pressure above nor from below. To produce respiration the operator kneels astride the patient's hips and rests the ball of each thumb upon the corresponding costo-xiphoid ligaments, the fingers falling naturally into the lower intercostal spaces. Resting his elbows against his sides, and using his knees...
Page 146 - a slightly acid, aqueous solution of hydrogen dioxide, containing, when freshly prepared, about 3 per cent., by weight, of the pure dioxide, corresponding to about 10 volumes of available oxygen.
Page 200 - Atropine acts as a stimulant to the central nervous system and paralyzes the terminations of a number of the nerves, more especially of those that supply involuntary muscle, secretory glands and the heart.
Page 71 - A liquid composed of not less than 92.5 per cent, by weight of absolute sulphuric acid (H,SO4 = 97.82) and not more than 7.5 per cent, of water.

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