Are There Membrane-Lined Channels through the Trophoblast? A Study with Lanthanum Hydroxide

1987 ◽  
pp. 557-571
Author(s):  
Peter Kaufmann ◽  
Hobe Schroeder ◽  
Heinz-Peter Leichtweiss ◽  
Elke Winterhager
Keyword(s):  
Lanthanum Hydroxide

Fixation of atmospheric CO2by a dimeric lanthanum hydroxide complex; assembly of an unusual hexameric carbonate

2006 ◽  
pp. 1002-1005 ◽  
Author(s):  
Louise Natrajan ◽  
Jacques Pécaut ◽  
Marinella Mazzanti
Keyword(s):  
Lanthanum Hydroxide ◽  
Complex Assembly

Topographical variations in the structure of the smooth septate junction

1979 ◽  
Vol 37 (1) ◽  
pp. 373-389
Author(s):  
H.B. Skaer ◽  
J.B. Harrison ◽  
W.M. Lee
Keyword(s):  
Musca Domestica ◽  
Functional Significance ◽  
Freeze Fracture ◽  
Rhodnius Prolixus ◽  
Malpighian Tubules ◽  
Septate Junction ◽  
Lanthanum Hydroxide ◽  
Septate Junctions ◽  
Standard Fixation

Smooth septate junctions in the midgut of Musca domestica and in Malpighian tubules of both Musca and Rhodnius prolixus are described. Details of the structures revealed after standard fixation, fixation in the presence of the stain, lanthanum hydroxide, and after freeze-fracture are discussed in the light of models previously put forward to explain the interrelations of the images obtained by these different methods. The organization of the junction between cells of the midgut varies in the apical-to-basal axis. At the apical border the septa (or ridges in freeze-fracture replicas) are packed tightly and follow an undulating but strictly parallel course. This packing loosens towards the middle of the junction until, at its basal extremity, the septa (ridges in replicas) are widely separated and follow independent meandering courses. That these features are found both in lanthanum-infiltrated specimens and freeze-fracture replicas allows a correlation to be made between the septa and the freeze-fracture ridges. The functional significance of these smooth septate junctions is discussed.

scholarly journals The lanthanum hydroxide fluoride carbonate system: The preparation of synthetic bastnaesite

1975 ◽  
Vol 12 (1-2) ◽  
pp. 115-121 ◽  
Author(s):  
John M. Haschke
Keyword(s):  
Carbonate System ◽  
Lanthanum Hydroxide

The Preparation and Purification of Hydrous Lanthanum Hydroxide Sols

1938 ◽  
Vol 60 (3) ◽  
pp. 726-727
Author(s):  
Therald Moeller ◽  
Francis C. Krauskopf
Keyword(s):  
Lanthanum Hydroxide

THE SOLUBILITIES OF LANTHANUM OXALATE AND OF LANTHANUM HYDROXIDE IN WATER. THE MOBILITY OF THE LANTHANUM ION AT 25°

1931 ◽  
Vol 53 (4) ◽  
pp. 1217-1225 ◽  
Author(s):  
I. M. Kolthoff ◽  
Ruth. Elmquist
Keyword(s):  
Lanthanum Hydroxide ◽  
Lanthanum Ion

Lanthanum Staining of Neurotubules in Axons from Cockroach Ganglia

1970 ◽  
Vol 7 (1) ◽  
pp. 217-231
Author(s):  
NANCY J. LANE ◽  
J. E. TREHERNE
Keyword(s):  
Cross Sections ◽  
Periplaneta Americana ◽  
Water Soluble ◽  
Clear Zone ◽  
Lanthanum Hydroxide ◽  
Small Water ◽  
The Core ◽  
Soluble Ions ◽  
Water Soluble Ions ◽  
Form Part

The axoplasm of the neurons of Periplaneta americana contains numerous neurotubules which are morphologically similar to the microtubules found in non-nervous tissues after sectioning or negative staining. In cross-sections of fixed material such tubules usually appear as electron-dense circles containing a less dense core and surrounded by a non-opaque ‘clear zone’. However, when cockroach ganglia are fixed and incubated in lanthanum hydroxide, the lanthanum is taken up intracellularly by the axoplasm of certain of the neurons and in these is found to stain the entire core of the neurotubules, as well as the clear zone. At least part of the wall of the tubules remains unstained and appears as a ring of non-opaque subunits against an electron-dense, lanthanum-stained background. Since lanthanum staining, under the conditions used here, is sometimes considered to demonstrate the presence of acid muco-polysaccharides, its uptake by the neurotubules may indicate that they contain carbohydrate as well as the protein that is generally considered to form part of the microtubular wall. Alternatively, the lanthanum could indicate the location of other anionic molecules, possibly undergoing extra- or intratubular translocation. The extent to which neurotubules could mediate movements of relatively small water-soluble ions and molecules is considered in relation to their diffusion through the polyanion matrix represented by the core of the tubules.

scholarly journals Effect of Lanthanum Hydroxide Coating on the High Temperature Oxidation of SUS430 Stainless Steel

1999 ◽  
Vol 85 (11) ◽  
pp. 814-820 ◽  
Author(s):  
Akihiro SAITO ◽  
Isao SAEKI ◽  
Ryusaburo FURUICHI
Keyword(s):  
Stainless Steel ◽  
High Temperature ◽  
High Temperature Oxidation ◽  
Lanthanum Hydroxide ◽  
Temperature Oxidation

Thermal decomposition of carbonated lanthanum hydroxide

2019 ◽  
Vol 138 (5) ◽  
pp. 3571-3575
Author(s):  
Elena Haibel ◽  
Ekkehard Füglein ◽  
Anne S. Schulze ◽  
Dirk Walter
Keyword(s):  
Thermal Decomposition ◽  
Lanthanum Hydroxide
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