Topographical Structural Variations of the Human Long Saphenous Vein and its Age-Related Remodelling as Revealed by Correlated Light and Scanning Electron Microscopy

1998 ◽  
Vol 13 (4) ◽  
pp. 156 ◽  
Author(s):  
A. Caggiati ◽  
G. Macchiarelli ◽  
G. Familiari
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Saphenous Vein ◽  
Structural Variations ◽  
Long Saphenous Vein ◽  
Age Related ◽  
Scanning Electron

Topographical Structural Variations of the Human Long Saphenous Vein and its Age-Related Remodelling as Revealed by Correlated Light and Scanning Electron Microscopy

1998 ◽  
Vol 13 (4) ◽  
pp. 157-162
Author(s):  
A. Caggiati ◽  
G. Macchiarelli ◽  
G. Familiari
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Saphenous Vein ◽  
Cellular Proliferation ◽  
Wall Structure ◽  
Elastic Tissue ◽  
Long Saphenous Vein ◽  
Age Related ◽  
Caudal Portion ◽  
Scanning Electron

Objective: To study topographical variations of the healthy human long saphenous vein structure and its age-related changes. Methods: One hundred and forty-four specimens taken at different levels from 36 long saphenous veins were studied by correlated light microscopy and scanning electron microscopy. Results: Continuous remodelling occurs in the wall of the long saphenous vein during the progress of life. In young subjects, the intima was narrow, circular muscular cells were present only in the media, and a rich elastic framework was evident in all the three tunicae. A progressive increase in collagen content and longitudinal musculature accompanied by a reduction in elastic tissue was observed in relation to ageing. Furthermore, at all ages, the saphenous vein wall thickened in its caudal portion due to a greater cellular proliferation and deposit of extracellular matrix. Conclusions: The topographical variations in saphenous wall structure as well as its age-related remodelling likely represent the parietal reaction to the physiological hydrostatic load related to the vertical pasture.

scholarly journals Morphological differentiation and distribution of non-glandular and glandular trichomes on Dracocephalum moldavicum L. shoots

2012 ◽  
Vol 63 (1) ◽  
pp. 11-22 ◽  
Author(s):  
Elżbieta Weryszko-Chmielewska ◽  
Marta Dmitruk
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Glandular Trichomes ◽  
Morphological Differentiation ◽  
Structural Variations ◽  
Abaxial Surface ◽  
The Rich ◽  
Trichome Types ◽  
Scanning Electron

The structure, micromorphology and distribution of trichomes on <i>Dracocephalum moldavicum</i> L. shots were investigated using light and scanning electron microscopy (SEM). There were distinguished 3 types of non-glandular trichomes, 3 types of glandular trichomes and papillae of the osmophore in the epidermis of the corolla. The highest density of non-glandular and glandular trichomes was found on the abaxial surface of the calyx, on bracts and in the upper part of the stem. Structural variations in the head and stalk of long glandular trichomes were demonstrated. The dimensions of particular types of trichomes are given in the present paper. Differences in the structure of the trichomes of this species are presented, compared to literature data. The micromorphology of particular trichome types is documented in numerous photographs showing the rich ornamentation of the cuticle of non-glandular trichomes.

Age-related changes in the human thymus studied with scanning electron microscopy

2008 ◽  
Vol 71 (8) ◽  
pp. 573-578 ◽  
Author(s):  
Carlo Cavallotti ◽  
Vito D'Andrea ◽  
Gianfranco Tonnarini ◽  
Chiara Cavallotti ◽  
Paolo Bruzzone
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Human Thymus ◽  
Age Related ◽  
Age Related Changes ◽  
Scanning Electron

Structural variations and transformation behavior of the Al68Cu11Co21 decagonal phase

1994 ◽  
Vol 9 (11) ◽  
pp. 2899-2906 ◽  
Author(s):  
B. Grushko ◽  
R. Wittmann ◽  
K. Urban
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Transformation Kinetics ◽  
Transformation Behavior ◽  
Structural Variations ◽  
Ordered Structures ◽  
Decagonal Phase ◽  
Prolonged Annealing ◽  
Electron Diffractograms ◽  
Scanning Electron

The Al68Cu11Co21 decagonal phase was studied after annealing at 1000 °C for 24-760 h by transmission and scanning electron microscopy. The strong superstructure odd-n reflections in the [1,-2, 1, 0, 0] electron diffractograms were stable under annealing up to about 40 h. As a possible origin of the increased intensities of the odd-n reflections the formation of vacancy-ordered structures is discussed. The structure was modified by prolonged annealing. In several annealed samples a dense net of extra reflections overlapping the quasiperiodic reflections was observed. This observation was explained as an indication of the formation of metastable states during cooling. Differently ordered decagonal structures exhibited different transformation kinetics during cooling from high temperatures.

Characterization of the Vasa Vasorum in the Human Great Saphenous Vein: A Scanning Electron Microscopy and 3D-Morphometry Study Using Vascular Corrosion Casts

2014 ◽  
Vol 20 (4) ◽  
pp. 1120-1133 ◽  
Author(s):  
Markus Herbst ◽  
Thomas Joachim Hölzenbein ◽  
Bernd Minnich
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Saphenous Vein ◽  
Great Saphenous Vein ◽  
Three Dimensional ◽  
Coronary Bypass ◽  
Vasa Vasorum ◽  
Corrosion Casts ◽  
Coronary Bypass Grafts ◽  
Scanning Electron

AbstractThe vasa vasorum (VV) of explanted segments of the human great saphenous vein (Vena saphena magna; HGSV), harvested during dissection for coronary bypass grafts or diseased vein segments from the “Salzburger Landesklinikum,” were studied by scanning electron microscopy and three-dimensional morphometry of microvascular corrosion casts. The main objective of this study was to examine the VV’s structural arrangement in order to find the most vital segments of the HGSV and in turn to improve the results of coronary bypass surgeries. The study presents a meticulous analysis of the whole microvascular system of the VV of the HGSV and its three-dimensional arrangement. It is one of the first studies yielding detailed quantitative data on geometry of the VV of the HGSV. A detailed insight into different vascular parameters such as vessel diameter, interbranching, intervascular distances, and branching angles at different levels of the VV’s angioarchitecture and in different parts of the HGSV in health and disease is given. Further, the geometry of bifurcations was examined in order to compute the physiological optimality principles of this delicate vascular system based on its construction, maintenance, and function.

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