scholarly journals Morphometric analysis of Capitella capitata (Polychaeta, Capitellidae)

2010 ◽  
Vol 100 (1) ◽  
pp. 13-18 ◽  
Author(s):  
Erica Veronica Pardo ◽  
Laura Laund S. Teixeira ◽  
Antônia Cecília Z. Amaral
Keyword(s):  
Morphometric Analysis ◽  
Linear Regression Analysis ◽  
Allometric Equation ◽  
Morphometric Parameter ◽  
Northern Coast ◽  
Intertidal Zones ◽  
Straight Line ◽  
Capitella Capitata ◽  
Best Parameters ◽  
Area And Volume

Accurate size measurements are fundamental in characterizing the population structure and secondary production of a species. The purpose of this study was to determine the best morphometric parameter to estimate the size of individuals of Capitella capitata (Fabricius, 1780). The morphometric analysis was applied to individuals collected in the intertidal zones of two beaches on the northern coast of the state of São Paulo, Brazil: São Francisco and Araçá. The following measurements were taken: the width and length (height) of the 4th, 5th and 7th setigers, and the length of the thoracic region (first nine setigers). The area and volume of these setigers were calculated and a linear regression analysis was applied to the data. The data were log-transformed to fit the allometric equation y = ax b into a straight line (log y = log a + b * log x). The measurements which best correlated with the thoracic length in individuals from both beaches were the length of setiger 5 (r² = 0.722; p<0.05 in São Francisco and r² = 0.795; p<0.05 in Araçá) and the area of setiger 7 (r² = 0.705; p<0.05 in São Francisco and r² = 0.634; p<0.05 in Araçá). According to these analyses, the length of setiger 5 and/or the area of setiger 7 are the best parameters to evaluate the growth of individuals of C. capitata.

scholarly journals Quantitative Geomorphological Parameters Analysis for the Aynalem- Illala Streams, Tigray, Northern Ethiopia

2021 ◽  
Vol 13 (1) ◽  
pp. 67-88
Author(s):  
Fethangest Woldemariyam Tesema ◽  
Gebrerufael Hailu Kahsay ◽  
Berihu Abadi Berhe
Keyword(s):  
Morphometric Analysis ◽  
Rock Material ◽  
Parameter Analysis ◽  
Surface Shape ◽  
Morphometric Parameter ◽  
Maturity Stage ◽  
Northern Ethiopia ◽  
Hypsometric Integral ◽  
Heterogeneous Rock ◽  
Relief Ratio

Morphometric analysis is the measurement and mathematical analysis of the configuration of the surface, shape, and dimension of landforms. The objective of this study is to characterize the Aynalem and Illala streams using the morphometric parameter. The topographic map at a scale of 1:50,000 taken from the Ethiopian National Mapping Agency was used to characterize the linear and areal aspects. ASTER Digital Elevation Model with 10m resolution was used to characterize the relief aspect. The Arc GIS 10.4.1 was used during the morphometric analysis. The analysis result of the streams is summarized based on the linear, areal, and relief aspects. The area is characterized by a dendritic drainage pattern which is characteristics of massive hard rock terrain. The Aynalem and Illala streams are 4th and 5th order streams. Considering the number of streams in the Aynalem (75.81%) and Illala (74.66%) is composed of first-order streams that indicate a flashy flood and the mean bifurcation value of Aynalem (6.8) and Illala (4.7) shows that the Aynalem area is more structurally affected than Illala but both show less stream integration. The analysis of areal aspects such as elongation ratio, circularity ratio, and form factor has indicated that both streams are characterized as elongated streams, this implies that both streams are flowing in heterogeneous rock material, presences of structural effect, and slow runoff discharge.  The other areal aspect such as drainage density, stream frequency, infiltration number, and length of overland flow all show smaller values in both streams. This implies that the streams are characterized by a relatively permeable rock material with a higher infiltration capacity. The relief aspect of the Aynalem and Illala was also analyzed using basin relief, relief ratio, ruggedness number, hypsometric curves, and Hypsometric integral. The streams are characterized by a lower relief ratio and ruggedness number which implies a relatively flat slope and lower relief. The hypsometric curves and the Hypsometric Integral of the streams indicate that the Aynalem and Illala are at the maturity stage. This shows the area is characterized by higher erosion but less affected by recent structures. Based on the morphometric parameter analysis result it is possible to conclude that the stream development is dependent on the topography and geology of the study area and both streams show similar morphometric character.

scholarly journals Pengaruh Regenerasi Kota Terhadap Kualitas Lingkungan Permukiman Industri Kecil Batik Studi Kasus: Kawasan Pabean, Kota Pekalongan

2020 ◽  
Vol 17 (2) ◽  
pp. 134
Author(s):  
Hari Sucahyo ◽  
Wisnu Pradoto
Keyword(s):  
Private Sector ◽  
Environmental Quality ◽  
Social Relations ◽  
Linear Regression Analysis ◽  
Urban Regeneration ◽  
Multiple Linear Regression Analysis ◽  
Northern Coast ◽  
Home Based ◽  
The Government

The development of Pekalongan city is rapidly due to its strategic location in the northern coast of Java and the establishment of a world heritage of Batik, so that it gives an influence on all aspects, especially social and economic. Pabean as one of the centers of the home-based batik industry in Pekalongan also played a role in the development of batik, but the existence of the tidal disaster coupled with the lack of conscious entrepreneurs in waste processing has made settlements at customs in a declining environmental quality. Regional recovery programs have been present with the aim of returning the function of settlement infrastructure and facilities in Pabean. This study seeks to examine how much influence the urban regeneration has on the quality of the residential environment in Pabean. by using multiple linear regression analysis using three independent variables which are the concept of urban regeneration, namely social relations of the community, participation of the private sector and the government in maintaining environmental quality, and the relationship between the public and private sector and the government towards the dependent variable of the quality of the settlement environment is obtained by the effect of 14, 29 percent.Keywords: urban regeneration, pekalongan, batik, Pabean

Airway Measurement Using Morphometric Analysis

1995 ◽  
Vol 104 (11) ◽  
pp. 835-838 ◽  
Author(s):  
Mary C. Santos ◽  
Louise Strande ◽  
Edward J. Doolin
Keyword(s):  
Morphometric Analysis ◽  
Computer Image ◽  
Major Axis ◽  
Tracheobronchial Tree ◽  
Minor Axis ◽  
Target Size ◽  
Endoscopic Images ◽  
Straight Line ◽  
Optimal Target

Measurement of airway size using endoscopic morphometry was investigated. Endoscopic images of the porcine tracheobronchial tree were obtained via a Storz system at a known distance from the telescope. The bronchi were marked with transluminal wires, transected, and imaged. All images were analyzed morphometrically with a computer image at multiple sites (N = 20). The endoscopic measurements were plotted against the macro lens images so that a straight line with a slope of 1 would indicate a consistent correlation. Area measurements for all images had a slope of 0.67 (r = .885); however, for images with area < 80 mm2 the slope was 1 (r = .928) and for images with area > 80 mm2 the slope was −0.63 (r = .757). Minor axis measurements had a slope for all images of 0.71 (r = .879), for images with area < 80 mm2 of 0.93 (r = .875), and for images with area > 80 mm2 of −0.34 (r = .482), and major axis had a slope for all images of 0.73 (r = .904), for images with area < 80 mm2 of 0.88 (r = .923), and for images with area > 80 mm2 of−0.59 (r = .771). Accurate area measurements as well as major and minor axis measurements can be obtained for airways with area < 80 mm2 by means of this system. Each bronchoscope-telescope unit has an optimal target size for which measurements are accurate.

scholarly journals MORPHOMETRIC ANALYSIS OF BAUR CATCHMENT IN LESSER HIMALAYA: USING GEO-SPATIALTECHNIQUES

2021 ◽  
Vol 9 (4) ◽  
pp. 83-100
Author(s):  
Neelesh Singh ◽  
◽  
Manisha Tripathi ◽  
Sunil Kumar ◽  
◽  
...  
Keyword(s):  
Morphometric Analysis ◽  
Geographical Area ◽  
Quantitative Description ◽  
Drainage System ◽  
Outer Part ◽  
Drainage Density ◽  
Morphometric Parameter ◽  
Lesser Himalaya ◽  
Drainage Pattern ◽  
Siwalik Group

The current assessment is an undertaking to evaluateand compare variousmorphometric parameters of the Baur catchment. Morphometric analysis of the river basin provides a quantitative description of the drainage system, which is an important aspect of the categorization of the basin (Strahler, 1964).The Baur catchment is located in the outer part of the Lesser Himalaya in the Kumaun region, which is a major part of Western Himalaya.The geographical area of Baur Catchment is 106.233Km2.Morphometric analysis of Baur Catchment includes linear, areal, and relief aspects.The calculation of the morphometric parameter, along with map preparation, was performed with the help of GIS techniques and ancillary material.Most of the area of Baur Catchment is occupied by Siwalik Group (sandstone and clay intercalation with pseudo-conglomerate) of rocks.The entire Baur Catchment has found 6th order drainage, which reveals sub-dendritic to a dendritic type of drainage pattern. It is observed that the drainage density of the Baur Catchment is 3.525 km/halfkm2.

scholarly journals Computed tomography morphometric analysis for C-1 posterior arch crossing screw placement in the pediatric cervical spine

2015 ◽  
Vol 15 (5) ◽  
pp. 475-479 ◽  
Author(s):  
Guang-Heng Xiang ◽  
Chong Wang ◽  
Chao Lou ◽  
Ming-Qiao Fang ◽  
Nai-Feng Tian ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Morphometric Analysis ◽  
Pediatric Patients ◽  
Linear Regression Analysis ◽  
Age Groups ◽  
Screw Placement ◽  
Posterior Arch ◽  
Fixation Technique ◽  
Pediatric Age Group ◽  
The Mean

OBJECT The goal of this study was to evaluate the feasibility of the C-1 posterior arch crossing screw fixation technique in the pediatric age group. METHODS One hundred twenty-three pediatric patients were divided into 6 age groups. Computed tomography morphometric analysis of the C-1 posterior arch was performed. Measurements included height, width, and length. Statistical analysis was performed using the Student t-test and linear regression analysis. RESULTS The mean measurement of the posterior arch was height (6.35 ± 1.80 mm), width (Width 1: 4.48 ± 1.25 mm; Width 2: 4.42 ± 0.68 mm; Width 3: 4.42 ± 0.50 mm), and length (14.48 ± 1.67 mm). Seven (6.93%) of the 101 children in Groups 1–4 and 13 (59.1%) of the 22 children in Groups 5 and 6 could safely accommodate placement of C-1 posterior arch crossing screws. CONCLUSIONS This investigation found that a C-1 posterior arch crossing screw was feasible in this group of Chinese pediatric patients, particularly in those 13 years and older. Preoperative thin-cut CT is essential for identifying children in whom this technique is applicable and for planning screw placement.

Morphometric analyses of two species of Scolelepis (Polychaeta: Spionidae)

2005 ◽  
Vol 85 (4) ◽  
pp. 829-834 ◽  
Author(s):  
Fábio Sá MacCord ◽  
A. Cecília Z. Amaral
Keyword(s):  
Regression Analysis ◽  
Discriminant Analysis ◽  
Linear Regression ◽  
Linear Regression Analysis ◽  
Sexually Dimorphic ◽  
Total Length ◽  
Morphometric Analyses ◽  
Wilks Lambda ◽  
The Relationship ◽  
Area And Volume

Seven hundred and six specimens of Scolelepis cf. chilensis and 551 specimens of Scolelepis goodbodyi were analysed. Individuals of each species were classified according to sex (male, female, and immature individuals). Width (w) and height (h) of setigers 3 and 5, the position of the first and the last gametogenic setigers, the total number of setigers, and the total length of each worm were measured. The area and volume of the setigers were estimated. Discriminant analysis was used to determine whether there were sexually dimorphic features, apart from the presence of gametes. Linear regression analysis was used to evaluate the relationship between each parameter and the number of setigers. Scolelepis cf. chilensis was found to be significantly larger than S.goodbodyi (t=21·71 and t=36·44, P<0·05 for length and number of setigers, respectively). These species also differed in the position of the first gametogenic setiger, which averaged 27 (SD=3) in S. cf. chilensis and 22 (SD=1) in S.goodbodyi (t= 29·18, P<0·05). There were no sexually dimorphic features in either sex of S. cf. chilensis (Wilks' lambda=0·9675, P>0·05, eigenvalue=0·034) or S.goodbodyi (Wilks' lambda=0·8429, P>0·05, eigenvalue=0·186). The total length showed the strongest correlation with the number of setigers in both species (r2=0·887 and 0·850 for S. cf. chilensis and S.goodbodyi, respectively), followed by the width and the volume of setigers.

Synthesis, characterization and VOCs adsorption kinetics of diethylstilbestrol-substituted metallophthalocyanines

2019 ◽  
Vol 23 (01n02) ◽  
pp. 166-174 ◽  
Author(s):  
Esra Kakı ◽  
Nurcan Gögsu ◽  
Ahmet Altındal ◽  
Bekir Salih ◽  
Özer Bekaroğlu
Keyword(s):  
Adsorption Kinetics ◽  
Linear Regression Analysis ◽  
Chlorinated Hydrocarbons ◽  
Rate Equations ◽  
H Nmr ◽  
Straight Line ◽  
Elovich Equation ◽  
Pseudo Second Order ◽  
Ft Ir ◽  
Kinetics Of

Compound (4,4[Formula: see text] -hex-3-ene-3,4-diyl)bis(4,1-phenylene)bis(oxy)diphthalonitrile 3 was synthesized by the reaction of 4-nitrophthalonitrile 1 and diethylstilbestrol 2 in dry DMF in presence of dry K2CO3. New mononuclear phthalocyanines 4-6 were obtained from compound 3 by addition of the corresponding metal salts [Co(OAc)2 ⋅ 4H2O, Zn(OAc)2 ⋅ 2H2O and Cu(OAc)2]. The novel compounds were characterized by elemental analysis and FT-IR, UV-vis, 1H-NMR and MALDI-TOF mass spectroscopy techniques. The effects of four main groups of organic vapors on these novel compounds were studied and discussed. The adsorption kinetics of alkanes ([Formula: see text]-hexane and [Formula: see text]-octane), alcohols (methanol and 2-proponal), chlorinated hydrocarbons (dichloromethane and trichloromethane) and amines (diethylamine and triethylamine) on 4-6 were examined using three adsorption kinetic models: the Elovich equation, the pseudo-first-order equations and Ritchie’s equation. Results show that the linear regression analysis with respect to the pseudo-second-order rate equations generates a straight line that best fits the data of adsorption of alcohols and chlorinated hydrocarbons on Pc films. On the other hand, the Elovich equation generates a straight line that best fits the data of adsorption of alkanes and amines.

Immune electron microscopy of haemocyanins from two southern african whelks

1978 ◽  
Vol 36 (2) ◽  
pp. 158-159
Author(s):  
Linda M. Stannard ◽  
Margaret Lennon
Keyword(s):  
Electron Microscopy ◽  
Electron Microscope ◽  
Outer Ring ◽  
Immune Electron Microscopy ◽  
Intertidal Zones ◽  
Central Belt ◽  
Cape Peninsula ◽  
Circular Contour

Burnupena cincta and Fusus verruculatus are two whelks which inhabit the intertidal zones of the Cape Peninsula shore. Their respiratory pigments, or haemocyanins, are morphologically similar in structure (Figs. 1 and 2) and appear in the electron microscope as short cylindrical rods about 34 nm in diameter and 36 nm high. Viewed side-on the molecules show regular banding suggesting a structure composed of six equidistant rings of sub-units. Occasionally the particles have the appearance of possessing a central “belt” in the position of the 3rd and 4th rows of sub-units. End-on views of the haemocyanin molecules show a circular contour with a dense outer ring and a less dense inner ring in which 10 definite sub-units may frequently be distinguished. A number of molecules display an extra central inner component which appears either as a diffuse plug or as a discrete ring-shaped core ± 8 nm in diameter.

Microdensitometer—computer correlation analysis of ultrastructural periodicity

1978 ◽  
Vol 36 (2) ◽  
pp. 32-33
Author(s):  
D.R. Ensor ◽  
C.G. Jensen ◽  
J.A. Fillery ◽  
R.J.K. Baker
Keyword(s):  
Correlation Analysis ◽  
Background Noise ◽  
Computer Control ◽  
Optical Diffraction ◽  
Screw Thread ◽  
Straight Line ◽  
Computer Storage ◽  
Correlation Process ◽  
Electron Microscope Image ◽  
Fixed Beam

Because periodicity is a major indicator of structural organisation numerous methods have been devised to demonstrate periodicity masked by background “noise” in the electron microscope image (e.g. photographic image reinforcement, Markham et al, 1964; optical diffraction techniques, Horne, 1977; McIntosh,1974). Computer correlation analysis of a densitometer tracing provides another means of minimising "noise". The correlation process uncovers periodic information by cancelling random elements. The technique is easily executed, the results are readily interpreted and the computer removes tedium, lends accuracy and assists in impartiality.A scanning densitometer was adapted to allow computer control of the scan and to give direct computer storage of the data. A photographic transparency of the image to be scanned is mounted on a stage coupled directly to an accurate screw thread driven by a stepping motor. The stage is moved so that the fixed beam of the densitometer (which is directed normal to the transparency) traces a straight line along the structure of interest in the image.

Sign in / Sign up

Export Citation Format

Share Document