scholarly journals Friction Characteristics of Fingertips Slid on the Molecular-Layer-Coated Solid Surfaces with Different Layer Formation State

2016 ◽  
Vol 11 (2) ◽  
pp. 396-402 ◽  
Author(s):  
Rina Yanagisawa ◽  
Saiko Aoki ◽  
Masabumi Masuko
Keyword(s):  
Molecular Layer ◽  
Solid Surfaces ◽  
Layer Formation ◽  
Friction Characteristics

Friction characteristics of inorganic or organic thin coatings on solid surfaces under water lubrication

2006 ◽  
Vol 39 (12) ◽  
pp. 1601-1608 ◽  
Author(s):  
Masabumi Masuko ◽  
Akihito Suzuki ◽  
Yu Sagae ◽  
Maiko Tokoro ◽  
Kenji Yamamoto
Keyword(s):  
Water Lubrication ◽  
Solid Surfaces ◽  
Friction Characteristics ◽  
Thin Coatings

Tribomechanical-Chemical Effects and Visualisation of Additive’s Layer Formation in Engine Crankcase Oil Between Sliding Pairs

2005 ◽  
Author(s):  
Hakan Kaleli ◽  
Yves Berthier
Keyword(s):  
High Speed ◽  
Mechanical Effect ◽  
Solid Surfaces ◽  
Layer Formation ◽  
X Ray Diffraction ◽  
Surface Degradation ◽  
Protective Layers ◽  
Crankcase Oil ◽  
Optical Electron ◽  
Significant Chemical

Examination of worn surfaces by optical, electron microscope detection and X-Ray diffraction analysis indicated that the replacement of the pin (steel 52100) by another pin (steel Stub 51115) facilitated and increased the influence of surface degradation which allows the sliding surface to be satisfactorily reactive to form high percentage of protective additive’s layers and to cover uniformly the whole wear track in boundary lubricated conditions. A few minutes of dry test well determined the production of the surface degradation to promote an optimal layer formation. The same type of tests were repeated using pin (sapphire) on the plate (steel Stub 51115) in order to be able to visualize the formation of layers. High speed camera has got images of layers and demonstrates the layer formation during experiment. This study suggests that the surface deterioration is a mechanical process and promotes chemical reactions at solid surfaces. Satisfactory degradation of the surface permits activating lubricant additives to form protective layers. The temperature has a significant chemical influence on the mechanical effect of the material type on the formation of additive’s layer.

Analysis of the response of planar polarization interferometer to molecular layer formation: fibrinogen adsorption on silicon nitride surface

2001 ◽  
Vol 16 (6) ◽  
pp. 381-390 ◽  
Author(s):  
Yuri M Shirshov ◽  
Boris A Snopok ◽  
Anton V Samoylov ◽  
Alexander P Kiyanovskij ◽  
Eugenii F Venger ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Molecular Layer ◽  
Layer Formation ◽  
Polarization Interferometer ◽  
Fibrinogen Adsorption

Ultrasturcture of cerebellar cells and neuropil in rats subjected to partial global cerebral ischemia

1986 ◽  
Vol 44 ◽  
pp. 126-127
Author(s):  
R.V.W. Dimlich ◽  
M.H. Biros
Keyword(s):  
Purkinje Cells ◽  
Glial Cells ◽  
Granule Cells ◽  
Molecular Layer ◽  
Cell Types ◽  
Primary Objective ◽  
Global Cerebral Ischemia ◽  
Forebrain Ischemia ◽  
Substantial Evidence ◽  
Cerebellar Cells

Although a previous study in this laboratory determined that Purkinje cells of the rat cerebellum did not appear to be damaged following 30 min of forebrain ischemia followed by 30 min of reperfusion, it was suggested that an increase in rough endoplasmic reticulum (RER) and/or polysomes had occurred in these cells. The primary objective of the present study was to morphometrically determine whether or not this increase had occurred. In addition, since there is substantial evidence that glial cells may be affected by ischemia earlier than other cell types, glial cells also were examined. To ascertain possible effects on other cerebellar components, granule cells and neuropil near Purkinje cells as well as neuropil in the molecular layer also were evaluated in this investigation.

Effects of aging on axon terminals in the dentate molecular layer

1987 ◽  
Vol 45 ◽  
pp. 928-929
Author(s):  
K. Cullen-Dockstader ◽  
E. Fifkova
Keyword(s):  
Granule Cells ◽  
Molecular Layer ◽  
Age Groups ◽  
Long Term Potentiation ◽  
Male Rats ◽  
Perforant Path ◽  
Axon Terminals ◽  
Fischer 344 ◽  
Spatial Memory Deficit ◽  
Effects Of Aging

Normal aging results in a pronounced spatial memory deficit associated with a rapid decay of long-term potentiation at the synapses between the perforant path and spines in the medial and distal thirds of the dentate molecular layer (DML), suggesting the alteration of synaptic transmission in the dentate fascia. While the number of dentate granule cells remains unchanged, and there are no obvious pathological changes in these cells associated with increasing age, the density of their axospinous contacts has been shown to decrease. There are indications that the presynaptic element is affected by senescence before the postsynaptic element, yet little attention has been given to the fine structure of the remaining axon terminals. Therefore, we studied the axon terminals of the perforant path in the DML across three age groups.5 Male rats (Fischer 344) of each age group (3, 24 and 30 months), were perfused through the aorta.

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