Hydrazine-deproteinated bone mineral. Physical and chemical properties.
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Animals↗
Biomedical subjects
R A Harper
Publications and source records attributed to R A Harper.
Serial liver function studies following barium enemas containing 1 percent tannic acid.
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Alkaline Phosphatase↗
Alkaline phosphatase of Drosophila melanogaster. I. Partial purification and characterization.
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Alkaline Phosphatase↗
The radiological spectrum of Crohn's disease.
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Adult↗
Surface areas of synthetic calcium phosphates and bone mineral.
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Animals↗
The effect of technique on the value of mammography.
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Breast Neoplasms↗
Certain aspects of duodenal radiology.
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Diagnosis, Differential↗
Measurement of non-crystalline calcium phosphate in bone mineral.
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Animals↗
Age changes in the crystal chemistry of bone apatite.
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Aging↗
Autoradiographic analysis of hormone-independent development of the mouse vaginal epithelium in organ culture.
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Autoradiography↗
New method of bone preparation for collagen fiber orientation studies by means of scanning electron microscopy.
A sample preparation technique was developed for observing the orientation of collagen fibers in the lamellas of human osteonic bone by means of scanning electron microscopy. Scanning electron micrographs of these fiber orientations are given in the text.
Bone and Bones↗
Elastic constants of the composite system hydroxyapatite-dicalcium phosphate dihydrate.
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Calcium Phosphates↗
Intracellular particle dissolution in macrophages isolated from the lung of the Fischer (F-344) rat.
Alveolar macrophages were removed from male F-344 rats by bronchoalveolar lavage and maintained in vitro for 14 days. Over this period the macrophages remained viable as judged by propidium iodide exclusion, lysosomal uptake of acridine orange, and phagocytosis of 1.75-microns latex beads. After 7 and 14 days of culture the cells contained lipid droplets. The macrophages were shown to ingest and dissolve monodisperse 57Co3O4 particles, which were relatively insoluble in extracellular medium. The fraction of 57Co3O4 dissolved intracellularly was determined at intervals during the culture period. The mean dissolution rate (+/- SEM) was 0.36 +/- 0.02% per day for the F-344 rat. This was lower than 1.4 +/- 0.05% per day estimated by Kreyling in macrophages from the beagle dog. The significance of this difference is discussed.
Animals↗