scholarly journals Morphometric Analysis of the Relationship between Bigonial Width and Cranium

2021 ◽  
Vol 2 (1) ◽  
pp. 109-116
Author(s):  
Seda Sertel Meyvacı ◽  
Mustafa Hızal
Keyword(s):  
Morphometric Analysis ◽  
The Relationship

scholarly journals Localization of DNA in the fibrillar components of the nucleolus: a cytochemical and morphometric study.

1993 ◽  
Vol 41 (6) ◽  
pp. 829-836 ◽  
Author(s):  
M Derenzini ◽  
F Farabegoli ◽  
D Trerè
Keyword(s):  
Morphometric Analysis ◽  
Mean Value ◽  
Morphometric Study ◽  
Dense Fibrillar Component ◽  
Thin Sections ◽  
Fibrillar Center ◽  
The Mean ◽  
Fibrillar Component ◽  
Resting Lymphocytes ◽  
The Relationship

We studied the distribution of DNA in human circulating lymphocyte nucleoli using three different cytochemical methods for selective visualization of DNA in thin sections: the Feulgen-like osmium-ammine reaction, the NAMA-Ur procedure, and the osmium-ammine staining in glycine buffer, pH 1.5. All three methods indicated the presence of uniformly distributed, highly decondensed DNA filaments forming a large solitary agglomerate in the central part of the nucleolar area, corresponding to the solitary large fibrillar center (FC) as revealed by uranium and lead staining. We also studied the relationship between DNA agglomerates and nucleolar fibrillar components in resting and phytohemagglutinin (PHA)-stimulated lymphocytes by morphometric analysis of the areas occupied by these structures. In resting lymphocytes the mean area of the DNA agglomerates was 0.479 micron 2 +/- 0.161 SD, whereas that of FCs was 0.380 micron 2 +/- 0.149 SD, with a ratio of 1.26. In PHA-stimulated lymphocytes the mean area of the DNA agglomerates was 0.116 micron 2 +/- 0.056 SD, whereas that of the FCs was 0.075 micron 2 +/- 0.032 SD, with a ratio of 1.55. In PHA-stimulated lymphocytes we also measured the area occupied by the FCs plus the closely associated dense fibrillar component (DFC). The mean value of these two fibrillar components was 0.206 micron 2 +/- 0.081 SD. These data demonstrate that decondensed DNA filaments are uniformly distributed in the FCs and that in transcriptionally active nucleoli they are also present in the proximal portion of the DFC surrounding the FCs.

scholarly journals DTM-Based Morphometric Analysis of Scoria Cones of the Chaîne des Puys (France)—The Classic and a New Approach

2021 ◽  
Vol 13 (10) ◽  
pp. 1983
Author(s):  
Fanni Vörös ◽  
Benjamin van Wyk de Vries ◽  
Dávid Karátson ◽  
Balázs Székely
Keyword(s):  
High Resolution ◽  
Morphometric Analysis ◽  
Regression Models ◽  
Morphometric Parameters ◽  
Morphometric Characteristics ◽  
New Approach ◽  
New Methods ◽  
The Relationship ◽  
Scoria Cones

Scoria cones are favorite targets of morphometric research. However, in-depth, DTM-based studies have appeared only recently, and new methods are being developed. This study provides a classic evaluation of the cones of Chaîne des Puys (Auvergne, France) as well as introduces a more detailed and statistics-based set of properties. Beside the classic parameters, a sectorial approach is applied to the slope distributions calculated from high resolution DTMs for 25 cones of different lithologies, in order to study the various (a)symmetries of the cones. DTM-based morphometric characteristics have been found to be different from classic descriptors, whereas the sectorial approach describes correctly the more and the less regular shapes. The distribution of interquartile ranges of the sectorial slope distributions is skewed. Sectorization discriminates various types of symmetries: there are almost circular cones, but the majority are elongated and have some asymmetry. The relationship between size parameters reflects the lithology, rather than the age of the cone. The attempt to relate morphometric parameters to age data is only partially successful: although there is a certain trend, within the same lithological group, subtle but possibly systematic trends can be detected for decreasing morphometric values (e.g., slope) with the age. The regression models indicate various outcomes. Further work is needed to understand all the diverse parameters, especially the lithology–shape relationship, and how symmetry is connected to different factors.

scholarly journals Morphometric Analysis of The Mandibular Incisive Canal in Different Facial Patterns

2020 ◽  
Vol 1 (5) ◽  
Author(s):  
Eduardo dos Santos Filho ◽  
Renata Dantas Barreto ◽  
Rudyard dos Santos Oliveira
Keyword(s):  
Morphometric Analysis ◽  
Facial Growth ◽  
Incisive Canal ◽  
Significance Level ◽  
Computed Tomography Scans ◽  
Facial Pattern ◽  
3D Software ◽  
The Relationship ◽  
Thé Vert

The study evaluated the morphometry of the mandibular incisive canal correlating with the different patterns of facial growth. The sample consisted of 90 cone beam computed tomography scans, divided into 3 groups: brachyfacial (n=30), mesofacial (n=30) and dolicofacial (n=30). For the determination of these groups, the acquisitions were arranged in the Dolphin 3D software to perform the Ricketts 3D cephalometric tracing and the VERT index. Next, the images were worked on the Ondemand3d software to perform the morphometric analysis of the incisive canal. For data analysis, the Kruskal-Wallis and Mann Whitney test were performed to test the interference of facial patterns, sex and age in the Mandibular Incisive Canal Extension. In the intragroup analysis of the MICE, the Friedman test was used, considering a 95% confidence interval and a significance level of 5%. The sample consisted of 54.4% of males and 45.6% of females. Sex and age had no effect on morphology and incisive canal extension. When the relationship between facial patterns and MICE was observed, brachyfacials (11.09 mm) presented a larger extent (p<0.001) than dolicofacial (4.10 mm) and mesofacial (5.55 mm). When the morphology of the MIC was analyzed, most individuals presented the linear horizontal format, and there was no direction between the groups. Thus, we can conclude that the facial pattern influences the MICE and sex, age and morphology were not influenced by the facial pattern.

scholarly journals The utility of Saw-scaled viper, Echis pyramidum, and Kenyan sand boa, Eryx colubrinus as bioindicator of heavy metals bioaccumulation in relation to DPTA soil extract and biological consequences

2018 ◽  
Author(s):  
Doha M. M. Sleem ◽  
Mohamed A. M. Kadry ◽  
Eman M. E. Mohallal ◽  
Mohamed A. S. Marie
Keyword(s):  
Heavy Metals ◽  
Morphometric Analysis ◽  
Histopathological Examination ◽  
Soil Extract ◽  
Bioaccumulation Factor ◽  
Heart Weight ◽  
Total Lipids ◽  
Total Proteins ◽  
Morphometric Measurements ◽  
The Relationship

AbstractThe present investigation was conducted to compare between the ecotoxocological effects of Ca, Mg, Fe, Cu, Zn, Co, Mo, Mn, B, Al, Sr, Pb, Ni, Cd and Cr on the saw-scaled viper, Echis pyramidum (E. p.) and the Kenyan sand boa, Eryx colubrinus (E.c.) inhabiting Gabal El-Nagar and Kahk Qibliyyah respectively in El-Faiyum desert, Egypt. Accumulation varied significantly among the liver, kidney and muscle. The relationship between concentrations of heavy metals in snakes and those in the soil from the collected sites was established by analyzing metal DPTA in soil. Bioaccumulation factor is calculated to estimate the degree of toxicity within the tissues. Morphometric analysis was recorded. All body morphometric measurements were higher in E. p. than in E. c.. Body, liver, gonad, kidney and heart weight, HSI, GSI, RBCs count, Hb content, PCV, MCV, MCH, MCHC, plasma glucose, total lipids and total proteins showed a significant increase in E. p. Histopathological examination showed damage and alterations of liver, kidney and testes sections. The tissues of E. c. were more destructed than those of E. p..

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