منابع مشابه
Chemical Constitution of Enamel and Dentin
An understanding of the calcification process requires exact. knowledge of the nature and variations of composition of the mineral phase of calcified tissues. Other investigators have continued the study, begun years ago, of the composition of the inorganic salts of bone, but a comprehensive study of the results of analysis of enamel and. dentin by modern methods has not been described. Crowell...
متن کاملThe Relationship between Chemical Constitution and Taste.
Some time ago the author had occasion to prepare a quantity of phenyl thio carbamide, and while placing it in a bottle the dust flew around in the air. Another occupant of the laboratory, Dr. C. R. Noller, complained of the bitter taste of the dust, but the author, who was much closer, observed no taste and so stated. He even tasted some of the crystals and assured Dr. Noller they were tasteles...
متن کاملThe barbiturates: chemical constitution and nomenclature.
BARBITURIC acid was first synthesized by Conrad and Guthzeit in 1882, and in 1903 the 5:5-diethyl derivative was introduced into medicine as a hypnotic by Carl Fischer and von Mering, under the name of Veronal. In the past, barbituric acid was usually regarded as the cyclic ureide of malonic acid, i.e. as malonyl urea, and its structural formula written in a form which emphasized this relations...
متن کاملChemical Constitution of the Primary Cell Walls of Avena Coleoptiles.
In studies of the structure and development of primary walls of plant cells, little detailed attention has been given to the non-cellulosic components of the wall. Indeed, as Bonner (6, p. 130) has indicated, only rarely have thorough analyses of plant walls of any type been made. For the most part, characterization of wall constituents has depended on solubility properties and staining tests, ...
متن کاملThe chemical constitution of the proteoglycan of human intervertebral disc.
Proteoglycan was prepared from three pools of normal human intervertebral discs by extraction with buffered 4M-guanidinium chloride followed by CsCl-density-gradient ultracentrifugation. Chromatography on agarose (Bio-Gel A-150m) and on DEAE-cellulose suggested a single polydisperse proteoglycan species. The intrinsic viscosities of three preparations were 166, 122 and 168 ml/g. After degradati...
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ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1959
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed036p476.3