Geoarchaeology and spatial distributions of the ‘ Coche Quemado ' obsidian source in north‐western Patagonia

Archaeometry ◽  
2019 ◽  
Vol 62 (2) ◽  
pp. 232-246
Author(s):  
M. L. Salgán ◽  
M. De La Paz Pompei ◽  
S. Diéguez ◽  
M. D. Glascock ◽  
G. Neme ◽  
...  
Keyword(s):  
Spatial Distributions ◽  
Obsidian Source ◽  
North Western

scholarly journals The First Obsidian Source in North-Western Iran for Provenance of Local Prehistoric Lithic Artifacts

2019 ◽  
Vol 5 (1) ◽  
pp. 1-15
Author(s):  
Akbar Abedi ◽  
◽  
Bahram Vosough ◽  
Mehdi Razani ◽  
Masoud B. Kasiri ◽  
...  
Keyword(s):  
Western Iran ◽  
Lithic Artifacts ◽  
Obsidian Source ◽  
North Western

Reaction couples of ceramic thin films prepared by CVD

1988 ◽  
Vol 46 ◽  
pp. 798-799
Author(s):  
D.W. Susnitzky ◽  
S.R. Summerfelt ◽  
C.B. Carter
Keyword(s):  
Thin Film ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Deposition Process ◽  
Solid State Reactions ◽  
Spatial Distributions ◽  
Diffusion Couples ◽  
Kinetics Studies ◽  
Ceramic Thin Films ◽  
Initial Stage

Solid-state reactions have traditionally been studied in the form of diffusion couples. This ‘bulk’ approach has been modified, for the specific case of the reaction between NiO and Al2O3, by growing NiAl2O4 (spinel) from electron-transparent Al2O3 TEM foils which had been exposed to NiO vapor at 1415°C. This latter ‘thin-film’ approach has been used to characterize the initial stage of spinel formation and to produce clean phase boundaries since further TEM preparation is not required after the reaction is completed. The present study demonstrates that chemical-vapor deposition (CVD) can be used to deposit NiO particles, with controlled size and spatial distributions, onto Al2O3 TEM specimens. Chemical reactions do not occur during the deposition process, since CVD is a relatively low-temperature technique, and thus the NiO-Al2O3 interface can be characterized. Moreover, a series of annealing treatments can be performed on the same sample which allows both Ni0-NiAl2O4 and NiAl2O4-Al2O3 interfaces to be characterized and which therefore makes this technique amenable to kinetics studies of thin-film reactions.

Application of high-resolution field-emission LVSEM, backscatter imaging, immunogold staining to definition of the spatial distributions of two human neutrophil adherence receptors

1993 ◽  
Vol 51 ◽  
pp. 36-37
Author(s):  
Robert D. Nelson ◽  
Sharon R. Hasslen ◽  
Stanley L. Erlandsen
Keyword(s):  
Cell Surface ◽  
Surface Membrane ◽  
Three Dimensional ◽  
Human Neutrophils ◽  
Spatial Distributions ◽  
Immunogold Staining ◽  
Functional Control ◽  
Neutrophil Adherence ◽  
Definition Of ◽  
Mode Of Attachment

Receptors are commonly defined in terms of number per cell, affinity for ligand, chemical structure, mode of attachment to the cell surface, and mechanism of signal transduction. We propose to show that knowledge of spatial distribution of receptors on the cell surface can provide additional clues to their function and components of functional control.L-selectin and Mac-1 denote two receptor populations on the neutrophil surface that mediate neutrophil-endothelial cell adherence interactions and provide for targeting of neutrophil recruitment to sites of inflammation. We have studied the spatial distributions of these receptors using LVSEM and backscatter imaging of isolated human neutrophils stained with mouse anti-receptor (primary) antibody and goat anti-mouse (secondary) antibody conjugated to 12 nm colloidal gold. This combination of techniques provides for three-dimensional analysis of the expression of these receptors on different surface membrane domains of the neutrophil: the ruffles and microvilli that project from the cell surface, and the cell body between these projecting structures.

Abstract #605: Anthropometric Indices Among Hiv Infected Patients in Kano, North Western Nigeria

2015 ◽  
Vol 21 ◽  
pp. 115-116
Author(s):  
Fakhraddeen Muhammad ◽  
Andrew Uloko ◽  
Ibrahim Gezawa ◽  
Mansur Ramalan ◽  
abdulrazaq habib
Keyword(s):  
Anthropometric Indices ◽  
North Western
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