HYDROGEN ION CONCENTRATIONS IN THE BLOOD OF INSECTS
نویسندگان
چکیده
منابع مشابه
Hydrogen Ion Concentrations in the Blood of Insects
The range of pH values for the blood of grasshoppers and of houseflies is 7.2 to 7.6. The range of values for roaches is 7.5 to 8.0. The range for Malacosoma americanum is 6.4 to 7.4; and the range for Bombyx mori is 6.4 to 7.2. From the work of other investigators and from the writer's results, it is apparent that the pH of insect blood, in general, may vary between 6.4 and 8.0. In the forms o...
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There has been a good deal of discussion as to the digestive and absorptive functions respectively pertaining to the several divisions of the intestinal tract of insects. The actual acidifies prevailing in the various regions of the gut are of special moment. Among other points of interest, questions arise as to the conditions of enzyme activity within the gut, and as to the possible r61e of su...
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Larvae of Psychoda and of Chironomus (diptera) maintained in solutions of appropriate indicators show that the typical acidities (pH) prevailing within the several regions of the digestive tract are: esophagus 7.1; cardiac chamber 6.2; mesenteron 7.5; the latter being functionally an intestine. The acidity of the hindgut, pH 6.4, is due to the discharge of the malphigian tubules.
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15 صفحه اولThe Colorimetric Estimation of the Hydrogen Ion Concentration of Blood.*
With the introduction of Cullen’s calorimetric method (1) of estimating the hydrogen ion concentration of blood serum or plasma, it seemed possible for every laboratoryto have a methodemploying minimum material and apparatus and yet secure reliable results. It is generally conceded that the results obtained by the method on normal human plasma or serum agree very well with the true pH as determ...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1925
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.7.5.599