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Article
Stellate cells in the Malpighian tubules of Drosophila hydei and D. melanogaster larvae (Insecta, Diptera)
The Malpighian tubules of Drosophila hydei and D. melanogaster larvae are composed of two types of cell, principal cells and stellate cells. In the anterior larval Malpighian tubules approximately 26% (D. hydei)...
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Article
Effects of bafilomycin A1 and amiloride on the apical potassium and proton gradients in Drosophila Malpighian tubules studied by X-ray microanalysis and microelectrode measurements
The intracellular distribution of potassium in Malpighian tubules from Drosophila larva was measured by electron probe X-ray microanalysis of freeze-dried cryosections. Application of amiloride alone to the haemo...
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Article
Digital image map** of water and dry mass content using ultrathin freeze-dried cryosections
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Article
Heterogeneous distribution of elemental contents in the larval Malpighian tubules of Drosophila hydei: X-ray microanalysis of freeze-dried cryosections
The elements Na, Cl and K are distributed heterogeneously in the larval cells of the four Malpighian tubules of Drosophila hydei. Elemental gradients are steeper when they are related to the dry weight in compari...
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Article
Quantitative X-ray microanalysis of the morula cell of the blood of the ascidian Halocynthia papillosa (Stolidobranchiata)
The elemental composition of the morula cell of Halocynthia papillosa blood was studied by X-ray microanalysis with respect to the possible iron accumulation in this cell type. We found various amounts of Na, Mg,...
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Article
On the shape of giant micelles in aqueous solutions of cetyltrimetylammoniumbromide (CTAB)
Low-temperature electron microscopy was used to image fracture faces of shock-frozen aqueous solutions containing the very large micelles of CTAB existing in the presence of N-methyl-N,N-diphenylamine (MDPA) a...
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Article
The spatial distribution of cations in nematocytes of Hydra vulgaris
The spatial distribution of cations was assayed qualitatively and quantitatively in tentacular nematocytes of Hydra vulgaris in a scanning transmission electron microscope by means of x-ray microanalysis performe...
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Chapter and Conference Paper
The spatial distribution of cations in nematocytes of Hydra vulgaris
The spatial distribution of cations was assayed qualitatively and quantitatively in tentacular nematocytes of Hydra vulgaris in a scanning transmission electron microscope by means of x-ray microanalysis performe...
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Chapter and Conference Paper
Electron Probe X-Ray Microanalysis in the Silkmoth Antenna — Problems with Quantification in Ultrathin Cryosections
The antenna of the male silkmoth has been a model system for olfactory physiology since the time when its response to the female sex pheromone could be recorded electrophysiologically (Schneider, 1957, 1984). ...
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Article
The use of membrane vesicles to study the NaCl/KCl cotransporter involved in active transepithelial chloride transport
Properties of the NaCl/KCl cotransport system were investigated in isolated membranes by flux measurements and binding studies. Chloride competes with “furosemide-like loop diuretics” for its two binding sites...
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Chapter
Measurements of the Elemental Distribution in Cells and Tissues by X-Ray Microanalysis
X-ray microanalysis has been used for several years for studies of the elemental composition of biological cells and tissues. The method is based on the physical fact that an electron beam of sufficient energy...
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Article
Comparative measurements of potassium and chloride with ion-sensitive microelectrodes and x-ray microanalysis in cultured skeletal muscle fibers
Data of the intracellular electrolyte concentration of potassium and chloride in cultured muscle cells measured by x-ray analysis were compared by using the different activity coefficients with intracellular p...
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Article
The element distribution in ultrathin cryosections of cultivated fibroblast cells
A preparation method for measurements of the intracellular distribution of elements in tissue culture cells is described which is based on cryofixation, cryoultramicrotomy, cryotransfer and X-ray microanalysis...
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Chapter and Conference Paper
Light-Microscopic and Electron-Microscopic Studies on the Morphology of Cat Carotid Body
The purpose of this work is to examine the qualitative morphologic findings on cat carotid body by means of quantitative data obtained from histologic and electron-microscopic studies. Combined with physiologi...
