The Differentiation and Specificity of Corresponding Proteins and Other Vital Substances in Relation to Biological Classification and Organic Evolutio

 
9781234183066: The Differentiation and Specificity of Corresponding Proteins and Other Vital Substances in Relation to Biological Classification and Organic Evolutio

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1909 edition. Excerpt: ...showed the kangaroos (Macropodidce) forming one group, and the phalanger apparently closer related to the Didelphyidce and the Dasyuridce in ratio, while the phalanger form recalls the Tasmanian wolf crystals of which no ratio was obtained. The kangaroos examined belonged to the genera Macropus, Epyprymnus, and Petrogale, and they naturally showed some variation, but formed a fairly close group. In this chapter there is also included the description of one species of the Edentata and one of the Sirenia which naturally do not show any very close resemblance to the Marsupialia nor to each other. MARSUPIALIA. Opossum, Didelphis virginiana. Plates 15-17. The first specimens were received from the Philadelphia Zoological Gardens, and the blood was putrid. The blood was oxalated and etherlaked, and yielded crystals very readily, the crystals forming soon after the slides were covered. These crystals were reduced hemoglobin. Later, living animals were procured, from which fresh blood was obtained. The animal was bled into oxalate in each case, and preparations were made of the whole blood, of the corpuscles alone, and of the corpuscles with various diluents. From these, oxyhemoglobin was obtained; but in several cases reduced-hemoglobin crystals appeared in the slides soon after the oxyhemoglobin began to form, and these developed along with the crystals of the first-formed oxyhemoglobin called a-oxyhemoglobin. Later the oxyhemoglobin, and eventually even the reduced hemoglobin crystals, dissolve, and a second form of oxyhemoglobin called /-oxyhemoglobin begins to appear, but all three, a-oxyhemoglobin, reduced hemoglobin, and /-oxyhemoglobin, may be seen side by side in the same slide (see plates 16 and 17). These three forms of crystals are...

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