Digital images of multipolar neurons from the human dentate nucleus: topologic and morphometric analysis accompanied with the classification by cluster analysis

2021 ◽  
Vol 124 ◽  
pp. 95-109
Author(s):  
Velicko Vranes ◽  
Nebojša T. Milošević
Keyword(s):  
Cluster Analysis ◽  
Morphometric Analysis ◽  
Dentate Nucleus ◽  
Digital Images

scholarly journals Morphometric Analysis of Nonsclerosed Glomeruli Size and Connective Tissue Content during the Aging Process

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Vesna R. Stojanović ◽  
Ivan D. Jovanović ◽  
Sladjana Z. Ugrenović ◽  
Ljiljana P. Vasović ◽  
Vladimir S. Živković ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Connective Tissue ◽  
Morphometric Analysis ◽  
Aging Process ◽  
Systemic Disease ◽  
Digital Camera ◽  
Morphometric Parameters ◽  
Tissue Content ◽  
Tissue Area ◽  
Tissue Specimens

Number of sclerotic glomeruli increases during the aging process. Consequently, majority of remained nonsclerosed glomeruli become hypertrophic and some of them sclerotic, too. The aim of this study was to quantify the size and connective tissue content of nonsclerosed glomeruli and to evaluate the percentage of hypertrophic ones in examined human cases during the aging. Material was right kidney's tissue of 30 cadavers obtained during routine autopsies. Cadavers were without previously diagnosed kidney disease, diabetes, hypertension, or any other systemic disease. Tissue specimens were routinely prepared for histological and morphometric analysis. Images of the histological slices were analyzed and captured under 400x magnification with digital camera. Further they were morphometrically and statistically analyzed with ImageJ and NCSS-PASS software. Multiple and linear regression of obtained morphometric parameters showed significant increase of glomerular connective tissue area and percentage. Cluster analysis showed the presence of two types of glomeruli. Second type was characterized with significantly larger size, connective tissue content, and significantly lower cellularity, in relation to the first type. Such glomeruli might be considered as hypertrophic. First type of glomeruli was predominant in younger cases, while second type of glomeruli was predominant in cases older than 55 years.

Key to the species of the genus Scleria (Cyperaceae) in Costa Rica based on the morphology of achenes

Phytotaxa ◽  
2016 ◽  
Vol 284 (2) ◽  
pp. 81
Author(s):  
PATRICIA ESPINOZA ◽  
EDUARDO CHACÓN-MADRIGAL ◽  
ETHEL SÁNCHEZ ◽  
JORGE GÓMEZ-LAURITO
Keyword(s):  
Cluster Analysis ◽  
Electron Microscope ◽  
Costa Rica ◽  
Scanning Electron Microscope ◽  
Light Microscope ◽  
Digital Images ◽  
Morphological Characters ◽  
Specific Variation ◽  
Scanning Electron

We described the achenes of 21 species of the genus Scleria reported in Costa Rica using 16 morphological characters and developed a key based only on achene characteristics. Specimens deposited in herbaria in Costa Rica were analyzed. We observed the achenes using a stereoscope and light microscope and took digital images that were used to measure the achenes. Besides, the achenes were observed using a Scanning Electron Microscope. A cluster analysis using achene characteristics was performed in order to know which species are morphologically similar. The intra-specific variation of the characteristics analyzed in the achenes studied is very small for all the species. Using characteristics of the achene, we could differentiate species among four of the five traditional sections of the genus used to classify the species: Hypoporum, Ophryoscleria, Schizolepis and Scleria. The key allows differentiating among 21 species of the genus Scleria previously reported in Costa Rica using only achenes. Besides the key, we prepared an illustrative guide for the genus using pictures taken with SEM and a stereoscope. The descriptions offer better information about the species that grow in Costa Rica.

Degeneration of the cerebellar dentate nucleus and the inferior olivary nuclei in HIV-1-infected brains: a morphometric analysis

1996 ◽  
Vol 92 (2) ◽  
pp. 150-155 ◽  
Author(s):  
Hiroko Abe ◽  
Parviz Mehraein ◽  
S. Weis
Keyword(s):  
Morphometric Analysis ◽  
Dentate Nucleus ◽  
Cerebellar Dentate Nucleus ◽  
Inferior Olivary ◽  
Hiv 1

scholarly journals About of the possibility of using of Adobe Photoshop software for the morphometric analysis of digital images of micropreparations during the immunohistochemical study of the bone matrix

2016 ◽  
Vol 24 (4) ◽  
pp. 101-106
Author(s):  
Vasily Mikhanov ◽  
◽  
Valentina Polyakova ◽  
Elena Mkhitaryan ◽  
Konstantin Meshcheryakov ◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Digital Images ◽  
Immunohistochemical Study ◽  
Bone Matrix ◽  
Adobe Photoshop

scholarly journals Morphometric analysis of Desmodium Desv. in Bangladesh

2013 ◽  
Vol 41 (2) ◽  
pp. 143-148
Author(s):  
Md Zahidur Rahman ◽  
M Oliur Rahman
Keyword(s):  
Cluster Analysis ◽  
Morphometric Analysis ◽  
Morphological Characters ◽  
The Other ◽  
Morphological Similarity ◽  
Phenetic Analysis ◽  
Upgma Dendrogram ◽  
Phenetic Relationships ◽  
Vegetative Characters

Phenetic analysis based on morphological characters is presented for 14 species of Desmodium Desv. in Bangladesh. This study examines patterns of morphological similarity and variation within Desmodium using 36 floral and vegetative characters. D. heterophyllum shows highest similarity with D. triflorum among the species employed. UPGMA dendrogram is constructed based on cluster analysis which reveals two major clusters, the first of which consists of seven species while the second cluster comprises six species, and D. microphyllum is found far from all other species. The presence of winged petioles distinguishes D. alatum and D. auriculatum from the other species. The present study shows the application of morphometric analysis for understanding the phenetic relationships among the species of Desmodium. DOI: http://dx.doi.org/10.3329/bjb.v41i2.13438 Bangladesh J. Bot. 41(2): 143-148, 2012 (December)

Taxonomic Identity of Gamochaeta americana and Gamochaeta coarctata (Gnaphalieae, Asteraceae)

Phytotaxa ◽  
2021 ◽  
Vol 523 (4) ◽  
pp. 273-283
Author(s):  
SUSANA E. FREIRE ◽  
MARIANA A. GROSSI ◽  
LAURA IHARLEGUI ◽  
CAMILA L. ABARCA ◽  
CLAUDIA MONTI ◽  
...  
Keyword(s):  
Cluster Analysis ◽  
Plant Height ◽  
Morphometric Analysis ◽  
Related Species ◽  
Morphological Characters ◽  
Principal Coordinate Analysis ◽  
Closely Related Species ◽  
Data Support ◽  
Morphological Basis ◽  
Multivariate Approaches

Gamochaeta (Asteraceae, Gnaphalieae) consists of about 60 species primarily distributed in tropical and subtropical America. Gamochaeta americana and G. coarctata are closely related species that have been mainly differentiated by its phyllary apices, plant height, width of basal leaves, and involucre height. In order to evaluate whether G. americana and G. coarctata can be differentiated on a morphological basis, we performed a morphometric analysis. A matrix of 24 morphological characters and 99 specimens was analyzed using two multivariate approaches: Cluster Analysis and Principal Coordinate Analysis. Both, the dendrogram and the Principal Coordinate Analysis (PCoA), showed that the two species are not clearly distinguished. No discriminating morphological characters for the two species have been found. In conclusion, all available data support that G. coarctata should be considered a synonym of G. americana. Lectotype is designated for Gnaphalium purpureum var. macrophyllum, and G. americana is described and illustrated.

A Segmentation Method for Digital Images Based on Cluster Analysis

2007 ◽  
pp. 554-563 ◽  
Author(s):  
Héctor Allende ◽  
Carlos Becerra ◽  
Jorge Galbiati
Keyword(s):  
Cluster Analysis ◽  
Digital Images ◽  
Segmentation Method

scholarly journals Use of the Cluster Analysis to Compare the Digital Images Traces of the Firing Pin

2014 ◽  
Vol 14 (1(2)) ◽  
pp. 187-190
Author(s):  
M. V. Kornilov ◽  
◽  
V. A. Fedorenko ◽  
Keyword(s):  
Cluster Analysis ◽  
Digital Images

scholarly journals Morphometric Analysis of Nasutitermes (Termitidae: Nasutitermitinae) from Sarawak, Malaysian Borneo

2020 ◽  
Vol 13 ◽  
pp. 1-10
Author(s):  
Wan Nurainie Wan Ismail
Keyword(s):  
Cluster Analysis ◽  
Morphometric Analysis ◽  
Morphological Variation ◽  
Morphological Characteristics ◽  
Head Capsule ◽  
Morphometric Measurements ◽  
Morphological Comparison ◽  
Clade 1 ◽  
Malaysian Borneo

This study aims to analyse the soldier’s morphological variation of Nasutitermes. In this study, a total of 107 individuals representing six species were appropriately measured and recorded, in which 12 morphometric measurements were used. The morphological comparison was made among six Nasutitermes species used in this study based on the head capsule and shape of rostrum, pronotum and postmentum. Following the comparison between six Nasutitermes species, we suggest that N. regularis and N. longinasus were closely resembled to each other than to the remaining four species; N. havilandi, N. matangensis, N. matangensiformis and N. fuscipennis based on the external morphological characteristics. The cluster analysis shows by the dendrogram resulted in two major clades; clade 1 grouped almost individuals of N. longinasus while clade 2 consists of the remaining five species. Accordingly, this study may serve as a baseline reference for the morphological characteristics that can be used in resolving taxonomic issues for Nasutitermes species.

scholarly journals Evaluation of the layered components of digital images based on cluster analysis and spline-approximation

2016 ◽  
Vol 4 (56) ◽  
Author(s):  
В. М. Курочкін ◽  
П. О. Приставка
Keyword(s):  
Cluster Analysis ◽  
Digital Images ◽  
Spline Approximation
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