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Full-Text Articles in Life Sciences
Changes In Sodium Concentration In Cardiac Myocytes From Diabetic Rats, Alice Warley
Changes In Sodium Concentration In Cardiac Myocytes From Diabetic Rats, Alice Warley
Scanning Microscopy
The effects of streptozotocin induced diabetes on rats were studied. The animals showed an increase in blood glucose concentration and a loss of weight from both the body and the heart. Loss of weight from the heart was less severe leading to an increased heart to body weight ratio. Study of element concentrations by X-ray microanalysis showed that there was an increase in intracellular Na concentration in cardiac myocytes from the diabetic animals, but no change in Mg. These results agree with studies which show changes in Na/K ATPase after the onset of diabetes.
Microprobe Analyses Of The Potassium-Calcium Distribution Relationship In Predentine, H. J. Höhling, H. Mishima, Y. Kozawa, T. Daimon, R. H. Barckhaus, K. -D. Richter
Microprobe Analyses Of The Potassium-Calcium Distribution Relationship In Predentine, H. J. Höhling, H. Mishima, Y. Kozawa, T. Daimon, R. H. Barckhaus, K. -D. Richter
Scanning Microscopy
Apex regions of continuously growing incisors of Wistar rats were quickly dissected, shock-frozen in liquid nitrogen-cooled propane, freeze-dried at -80 °C and infiltrated with Spurr's resin . 400nm thick dry sections were cut with a diamond knife on an ultramicrotome . Relatively flat sections were transferred with an eye lash onto collodium coated aluminum grids. They were flattened with a glass stick and by placing another collodi um coated aluminum grid just on top of the first one, exerting a uniform pressure . After carbon coating the sections were observed using the backscattered and secondary electron signals in a scanning …
Micro-Pixe (Proton-Induced X-Ray Emission) Study Of The Effects Of Fluoride On Mineral Distribution Patterns In Enamel And Dentin In The Developing Hamster Tooth Germ, D. M. Lyaruu, G. H. J. Tros, A. L. J. J. Bronckers, J. H. M. Wöltgens
Micro-Pixe (Proton-Induced X-Ray Emission) Study Of The Effects Of Fluoride On Mineral Distribution Patterns In Enamel And Dentin In The Developing Hamster Tooth Germ, D. M. Lyaruu, G. H. J. Tros, A. L. J. J. Bronckers, J. H. M. Wöltgens
Scanning Microscopy
Micro-PIXE (proton-induced X-ray emission) analysis was performed on unfixed and anhydrously prepared sections from developing enamel and dentin from hamsters injected with a single dose of 20 mg NaF /kg body weight. Fluoride, apart from inducing the formation of the characteristic paired response in the enamel (i.e., a hyper- followed by a hypomineralized band in the secretory enamel), also induces the formation of sub-ameloblastic cystic lesions under the transitional and early secretory enamel accompanied by relatively intense hypermineralization of the underlying cystic enamel surface. These cystic lesions, however, were only found to be associated with certain isolated populations of these …
X-Ray Microanalysis Of Ca And K In Corn Bran And Oat Hulls, F. R. Dintzis, F. L. Baker, T. C. Nelsen
X-Ray Microanalysis Of Ca And K In Corn Bran And Oat Hulls, F. R. Dintzis, F. L. Baker, T. C. Nelsen
Scanning Microscopy
Oat hulls and dry-milled corn bran were loaded with calcium or potassium and made into either sectioned bulk specimens of intact tissue embedded in resin or into non-sectioned bulk specimens made from powdered-compressed tissue formed into disks without resin. Regression lines of X-ray count versus mineral concentration were similar for both Ca and K. X-ray count versus mineral concentration relationships were similar for intact oat hulls and powdered-compressed specimens of either oat hulls or corn bran. However, the relationship for intact corn bran embedded in resin was significantly different. While the reason for this difference is not known, the result …
Techniques For The Microanalysis Of Higher Plants With Particular Reference To Silicon In Cryofixed Wheat Tissues, M. J. Hodson, A. G. Sangster
Techniques For The Microanalysis Of Higher Plants With Particular Reference To Silicon In Cryofixed Wheat Tissues, M. J. Hodson, A. G. Sangster
Scanning Microscopy
The applications of x-ray microanalysis in research into silicon in higher plants are reviewed, recent developments are assessed, and new data are presented. Conventionally prepared material [air or freeze drying for scanning electron microscopy (SEM), and glutaraldehyde/osmium tetroxide fixation for transmission electron microscopy (TEM)) has been studied using both wavelength and energy dispersive microanalysis. These techniques are reliable provided that the deposited form of silica is the major focus of investigation. Recently, studies concerning the soluble, mobile forms of silica, and the ionic environment at deposition sites have been initiated. In these investigations x -ray microanalysis has been carried out …