Quantitative Methods Used to Describe the Structure of Iron

2015 ◽  
Vol 228 ◽  
pp. 325-332
Author(s):  
B. Łosiewicz ◽  
A. Wala ◽  
Grzegorz Dercz ◽  
Magdalena Popczyk
Keyword(s):  
Surface Area ◽  
Quantitative Methods ◽  
Average Length ◽  
Linear Method ◽  
Length Unit ◽  
Flat Structure ◽  
Mean Values ◽  
Electrode Processes ◽  
Average Surface Area ◽  
Pattern Scale

The electrode processes are often studied on iron for the needs of hydrogen technologies. This paper presents the use of the resources of the “MicroScan” program in manual methods to determine the stereological parameters of the Armco iron. For this purpose, the average number of particles per one unit of the NA surface area and the average surface area of the grains in the 〈A flat structure were determined, using the planimetric, the Jeffries and the comparative methods. The linear method was used to determine the average number of segments per one length unit of the NL structure and the average length of the circuits of grains in the 〈L flat structure. It was found out that the mean values of the determined parameters were in line with the PN-84/H-04507 standard and small differences existing in the obtained results were due to the jumping character of the pattern scale of the mentioned standard. The relative error of the NA and A parameters indicates that the planimetric method allows to achieve the most accurate measurement of the size of the grain.

Regression of corneal neovascularization: Adiponectin versus bevacizumab eye drops

2019 ◽  
pp. 112067211987494 ◽  
Author(s):  
Alireza Baradaran-Rafii ◽  
Azin Ashnagar ◽  
Saeed Heidari Keshel ◽  
Sayena Jabbehdari ◽  
Ghazaleh Baradaran-Rafii
Keyword(s):  
Surface Area ◽  
Average Length ◽  
Corneal Neovascularization ◽  
Silk Suture ◽  
Eye Drops ◽  
Artificial Tears ◽  
Control Groups ◽  
Average Surface ◽  
Average Surface Area ◽  
And Control

Purpose: Comparing the effect of adiponectin versus bevacizumab in decreasing corneal neovascularization. Methods: This study was conducted on 30 eyes of 30 New Zealand Albino male rabbits. Corneal neovascularization was induced by a single 7-0 silk suture 2 mm long and 1 mm in front of the limbus for 2 weeks. Rabbits were randomly divided into three groups of adiponectin (20 µg/mL), bevacizumab (5 mg/mL) and artificial tears. The treatments continued up to 14 days. Results: At the end of 14 days, the average length of vessels in rabbits treated with adiponectin, bevacizumab and control groups decreased from 2.12 ± 0.32 mm to 0.89 ± 0.46 mm (57.68% ± 19.98%) (P < 0.001), 2.30 ± 0.41 mm to 1.30 ± 0.58 mm (42.49% ± 27.17%) (P = 0.048) and from 2.12 ± 0.44 mm to 1.81 ± 0.42 mm (14.81% ± 5.64%) (P = 0.112), respectively. The length of vessels decreased 57.68% ± 19.98% and 42.49% ± 27.17% in adiponectin versus bevacizumab groups, respectively (P = 0.527). The average surface area of vessels in rabbits treated with adiponectin, bevacizumab and control groups reduced from 5.02 ± 1.50 mm2 to 1.40 ± 0.75 mm2 (70.64% ± 17.76%) (P < 0.001) 0.34 ± 1.1 mm2 to 2.80 ± 1.04 mm2 (48.24% ± 19.23%) (P = 0.039) and 5.12 ± 2.92 mm2 to 4.4 ± 2.55 mm2 (14.68% ± 4.19%) (P = 0.117). Mean surface area of vascularization decreased 70.64% ± 17.76% and 48.24% ± 19.23% in adiponectin versus bevacizumab, respectively (P = 0.013). Conclusions: The results of this study suggest that topical adiponectin can decrease recent corneal neovascularization.

III. PULMONARY DIFFUSION

PEDIATRICS ◽  
1965 ◽  
Vol 35 (1) ◽  
pp. 185-193
Author(s):  
George R. DeMuth ◽  
William F. Howatt
Keyword(s):  
Carbon Monoxide ◽  
Body Size ◽  
Longitudinal Data ◽  
Surface Area ◽  
Residual Variance ◽  
Normal Variation ◽  
Diffusing Capacity ◽  
Healthy Individuals ◽  
Lung Volumes ◽  
Mean Values

1. Equations describing the normal variation and changes with size of the diffusing capacity (rebreathing technique) for boys and girls have been obtained from 230 observations on 139 children. 2. The use of covariance analysis on the longitudinal data reduces the residual variance by about half, indicating that in children the diffusing capacity for carbon monoxide, Dco, grows along growth lines. This aids in finding significant deviations from the predicted in children who are followed with repeated examinations. 3. The Dco increases with growth in a manner very similar to that of the lung volumes, not only in respect to height, but also in respect to age, weight, and surface area. The ratio Dco/TLC expresses a relationship which does not vary with body size, age, or sex in these healthy individuals. Although boys and girls have the same mean values, the correlation between each individual's values from the two series is significant for boys but not for girls. 4. The constancy of the Dco/TLC during growth supports the hypothesis that the lung grows between the ages of 5 and 18 years by the addition of new air spaces rather than by enlarging the pre-existing ones.

MAXIMUM BREATHING CAPACITY AND VITAL CAPACITY OF MALE CHILDREN AND ADOLESCENTS

PEDIATRICS ◽  
1952 ◽  
Vol 9 (6) ◽  
pp. 659-670
Author(s):  
B. G. FERRIS ◽  
J. L. WHITTENBERGER ◽  
J. R. GALLAGHER
Keyword(s):  
Children And Adolescents ◽  
Surface Area ◽  
Body Surface Area ◽  
Body Surface ◽  
Vital Capacity ◽  
Normal Values ◽  
Mean Values ◽  
Single Attribute ◽  
Standard Deviations ◽  
The Individual

Expected mean values and a range of normal values (plus or minus two standard deviations) are presented for the vital capacity and the maximum breathing capacity of male children and adolescents. It is recommended that calculations of the above values be based upon four attributes (age, height, weight, and body surface area) rather than upon a prediction deriving from a single attribute (especially in the individual who does not have a standard height and weight for his age).

scholarly journals Comparison of Exposure in the Kaplan Versus the Kocher Approach in the Treatment of Radial Head Fractures

Hand ◽  
2018 ◽  
Vol 14 (2) ◽  
pp. 253-258 ◽  
Author(s):  
Leslie Fink Barnes ◽  
Joseph Lombardi ◽  
Thomas R. Gardner ◽  
Robert J. Strauch ◽  
Melvin P. Rosenwasser
Keyword(s):  
Surface Area ◽  
Radial Head ◽  
Lateral Collateral Ligament ◽  
Radial Head Fractures ◽  
3 Dimensional ◽  
Average Surface Area ◽  
The Mean ◽  
The Difference ◽  
Head Neck

Background: The aim of this study was to compare the complete visible surface area of the radial head, neck, and coronoid in the Kaplan and Kocher approaches to the lateral elbow. The hypothesis was that the Kaplan approach would afford greater visibility due to the differential anatomy of the intermuscular planes. Methods: Ten cadavers were dissected with the Kaplan and Kocher approaches, and the visible surface area was measured in situ using a 3-dimensional digitizer. Six measurements were taken for each approach by 2 surgeons, and the mean of these measurements were analyzed. Results: The mean surface area visible with the lateral collateral ligament (LCL) preserved in the Kaplan approach was 616.6 mm2 in comparison with the surface area of 136.2 mm2 visible in the Kocher approach when the LCL was preserved. Using a 2-way analysis of variance, the difference between these 2 approaches was statistically significant. When the LCL complex was incised in the Kocher approach, the average visible surface area of the Kocher approach was 456.1 mm2 and was statistically less than the Kaplan approach. The average surface area of the coronoid visible using a proximally extended Kaplan approach was 197.8 mm2. Conclusions: The Kaplan approach affords significantly greater visible surface area of the proximal radius than the Kocher approach.

scholarly journals Morphology and morphometry of ramification of the aortic arch in domestic shorthair cats in the clinical aspect

2017 ◽  
Vol 73 (5) ◽  
pp. 295-298
Author(s):  
Karolina Barszcz ◽  
Joanna Klećkowska-Nawrot ◽  
Karolina Goździewska-Harłajczuk ◽  
Zbigniew Bełkot ◽  
Norbert Czubaj ◽  
...  
Keyword(s):  
Aortic Arch ◽  
Surface Area ◽  
Subclavian Artery ◽  
Left Subclavian Artery ◽  
Mean Values ◽  
Brachiocephalic Trunk ◽  
Males And Females ◽  
The Mean ◽  
Morphology And Morphometry ◽  
Post Hoc

The aim of the study was to investigate the morphology and morphometry of ramifications of the aortic arch in domestic shorthair cats in relation to the sex of the animals. The morphological study was performed on 61 hearts of adult domestic shorthair cats of both sexes, preserved in the 10% solution of formalin. Measurements of the area of openings of basic branches and distances between them were performed. In cats we can observe a double type of direct ramification of the aortic arch: the brachiocephalic trunk and the left subclavian artery. In all studied cases, the surface area of the ostium of the brachiocephalic trunk (SABT) was greater 4.94 ± 1.35 mm2 than the surface area of the ostium of the left subclavian artery (SALSA) 2.38 ± 0.88 mm2. The average difference between the opening area of the above vessels (r) amounted to 2.56 mm2. In the studied group of cats, the distance between the openings (d) varied between 0.5 and 4.37 mm. In the post hoc comparison of the mean values no statistically significant differences were found between the population of males and females. Fundamental changes in the structure of openings were found in two females. The first one concerned a secondary division of the brachiocephalic trunk opening and the second one – a secondary division of the opening of the left subclavian artery in the area of their parting from the aortic arch. CT angiography or MRI angiography is the method of choice for diagnosis of vascular disorders or malformations. The knowledge of the aortic arch morphology in various species of animals is a prerequisite for a correct assessment of the results of imaging tests.

scholarly journals Evaluation of Scrotal Temperature in Different Testicular Shapes by Infrared Thermography in Braford Bulls

2019 ◽  
Vol 47 (1) ◽  
Author(s):  
Patrícia Da Cruz Favaro ◽  
Gabriel Ribas Pereira ◽  
Flávio Antônio Barca Jr. ◽  
Marcelo Marcondes Seneda ◽  
Augusto César Alves Assunção ◽  
...  
Keyword(s):  
Surface Area ◽  
Infrared Thermography ◽  
Average Length ◽  
Thermal Sensitivity ◽  
The Body ◽  
Average Width ◽  
Scrotal Circumference ◽  
Mean Width ◽  
The Mean ◽  
Oval Shape

Background: The mechanisms of testicular thermoregulation may influence the blood flow provided by the testicular artery, where the proper blood supply to the testicle is crucial for promotingspermatogenesis and reproductive function in bulls. The size and shape of the testicles are determined by genetic mechanisms and environmental effects. A better understanding of the relationships between the anatomical characteristics of the testicles and scrotum can support a better reproductive assessment. The purpose of the current study was to evaluate the testicular temperature of different scrotal shapes using infrared thermography in bulls.Materials, Methods & Results: We evaluated 132 Braford bulls with an average age of 24 months. The evaluation of breeding bull semen was performed prior to the beginning of the experiment. Then, animals were selected on the basis of the size of their testes, which was determined by dividing the average width by the average length. The scrotal circumference was measured with a millimeter tape positioned around the largest circumference. Testicular and ocular temperature measurements and analysis were conducted using an infrared thermal camera, Flir T440 with emissivity of 0.98 and thermal sensitivity of 0.05°C. Testicular scrotum temperature and testicular shape were analyzed with one-way ANOVA using Minitab 16, and values of P < 0.05 were considered statistically significant. We observed that 67.42% of testicle shapes were long-oval, and 32.58% were long-moderate. The testicular temperature was higher in bulls with the long-moderate shape compared to those with the long-oval shape (P < 0.05). The mean length was higher in long-moderate shaped testicles compared to those of the long-oval shape (P < 0.01). There was no significant differences in rectal and ocular temperatures or in scrotal circumference between bulls with long-moderate and long-oval shapes (P > 0.05). In addition, the mean width was lower in testicles of long-moderate shape compared to those of the long-oval scrotal format (P < 0.01).Discussion: The results obtained showed that Braford bulls with the long-moderate testicular shape have a higher testicular temperature to maintain proper thermoregulation. The present study demonstrated that IRT can be used to evaluate the testicular temperature in animals with different scrotal conformations. In this study, Braford bulls showed lower length and width values for animals having long-moderate (9.21 and 5.22, respectively) and long-oval formats (8.56 and 5.56, respectively). In contrast, previous reports examining Nellore bulls between the ages of 17-20 months found a predominance of the long oval shape followed by the long-moderate shape, which indicates a change in testicular shape as age progresses, resulting in a rounder testicular shape. Perhaps other factors, such as the external cremaster muscle and tunica dartos, cause the testicles to be retracted towards the body at lower temperatures while at high temperatures, relaxation occurs. The prevailing testicular shape in Braford animals with a mean age of 24 months was the long-moderate shape. Thus, testicles with a larger surface area will have lower temperatures because they can dissipate heat more easily than testicles with lower surface area. The results suggest that the long-moderate scrotum format may influence the testicular temperature in mature Braford bulls.

scholarly journals Estimation of the chemical specific surface area of catalytic nanoparticles by TEM images analysis

2018 ◽  
Vol 1 (87) ◽  
pp. 5-12 ◽  
Author(s):  
M. Pawlyta ◽  
B. Sobel ◽  
B. Liszka
Keyword(s):  
Fuel Cells ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Platinum Nanoparticles ◽  
Quantitative Methods ◽  
Particle Diameter ◽  
Spherical Particles ◽  
Platinum Particles ◽  
Materials Used

Purpose: The purpose of this article is the development of quantitative methods for assessing the quality of nanocomposite materials used in fuel cells. Design/methodology/approach: latinum is the most commonly used catalyst in fuel cells, commonly in the form of nanoparticles deposited on the surface of carbon black. Due to the nanometric size of platinum particles, transmission electron microscopy can be applied to evaluate the produced catalysts. TEM image also allow to determinate the approximate value of the chemical specific surface area) of platinum nanoparticles, but only in case of spherical particles. Findings: In present work, taking into account additional assumptions resulting directly from the analysis of microscopic images, the method of estimation of the particle diameter and the chemical specific surface area for nonsymmetrical (elongated) nanoparticles is present. Research limitations/implications: The presented work presents a method for determining the specific surface of platinum, when their shape is elongated. It is worth noting that the modified formulas for determining the particle diameter and the value of the chemically active specific surface of the platinum nanoparticles of the elongated shape are equivalent to the formulas previously given for spherical particles, if the particle length and its diameter are equal. In this case, patterns for symmetric particles and more general (modified) patterns can be used interchangeably. Practical implications: Development of new and more effective catalysts for fuel cells. Originality/value: The significance of the presented work results from the possibility of using the described method in the catalyst studies during real catalytic processes. It allows comparing catalytic activity after the process, also in unusual conditions and in an aggressive environment, using minimal amounts of material.

scholarly journals Super Resolution Optical Microscopy for Analysis of Granules in B-Cell Acute Lymphoblastic Leukemia

Blood ◽  
2014 ◽  
Vol 124 (21) ◽  
pp. 5347-5347
Author(s):  
Rio Barrere-Cain ◽  
Sebastian Wachsmann-Hogiu ◽  
Denis M. Dwyre
Keyword(s):  
Bone Marrow ◽  
Surface Area ◽  
Bone Marrow Aspirate ◽  
Lymphoblastic Leukemia ◽  
Average Diameter ◽  
Maximum Intensity ◽  
Average Depth ◽  
Average Surface Area ◽  
High Resolution Images ◽  
Cell Acute Lymphoblastic Leukemia

Abstract An unusual case of B-cell acute lymphoblastic leukemia (B-ALL) was diagnosed at our institution. The B-ALL had unusually large prominent granules, but the diagnosis was confirmed by flow cytometry. Using structured illumination microscopy (SIM), we obtained high resolution images of the granules in the lymphoblasts. With these high resolution images, we acquired detailed quantitative information on the morphology of these unusual cells. We compared the morphology of this unusual B-ALL case with granular acute myeloid leukemia (AML) cases, standard B-ALL cases, and non-leukemic marrow aspirate specimens. Granular B-ALL can sometimes be misdiagnosed as AML, which would result in patients not receiving the optimal treatment. Our goal is to study the structure of these unusual B-ALL cases. More information characterizing the granules may assist in understanding how these leukemic lymphoblasts function. Granules in B-ALL are believed to be abnormal organelle formations or fusions. Electron microscopy (EM) reveals that the granules resemble membrane bound vesicles and it has been suggested that they are atypical mitochondria, lysosomes, or damaged chromosomes. These suggestions have been based on EM images and the cytochemical profile of the cells (Pitman et al., 2007; Cap et al., 2000). To our knowledge, granular B-ALL lymphoblasts have never been imaged with SIM. We took images of the same cells using both brightfield light microscopy and SIM. Figures 2 and 3 show the same cells imaged with both microscopes. We made maximum intensity Z projections (the pixels in stack of images with maximum intensity projected onto one image), cutting off Z-slices where the cell was not focused in order to avoid measuring granules outside the cell. Next, we randomly selected granules to measure in each cell's Z projection. Using Image J software, we measured the surface area, diameter, depth, intensity relative to background, and shortest distance to nucleus and plasma membrane for each individual granule. We then averaged the measurements from each type of sample (granular B-ALL, AML, non-leukemic). The granules in B-ALL had an average diameter of .285 micrometers, average depth of .506 micrometers, average surface area of .147 micrometers squared, and were on average 2.74 times more intense than the background. The granules in AML had an average diameter of .479 micrometers, average depth of .440 micrometers, average surface area of .2255 micrometers squared, and were on average 1.953 times more intense than the background. The B-ALL granules were smaller and more intense. The stain used for the cytoplasm, eosin, is acidic. The brighter B-ALL granules suggest that they have higher concentrations of basic proteins than the AML granules. This technique may be useful in separating granules in AML leukemia, ALL leukemias, and possibly leukemias of ambiguous lineage. Other techniques we are investigating include automated count of granules and granule characterization with Raman Spectroscopy to determine chemical composition. Evaluating the cells with fluorescent probes that specifically attach to either lysosomes or mitochondria may give additional biochemical information about the granules/leukemias. Matching fluorescent signals from these probes to granules in ALL may assist in determining whether the granules are lysosomal or mitochondrial in origin. Figure 1: Granular B-ALL bone marrow aspirate sample imaged with SIM and converted to a maximum intensity Z projection, arrow indicates a granule Figure 1:. Granular B-ALL bone marrow aspirate sample imaged with SIM and converted to a maximum intensity Z projection, arrow indicates a granule Figure 2: AML bone marrow aspirate sample imaged with SIM and converted to a maximum intensity Z projection, arrow indicates a granule Figure 2:. AML bone marrow aspirate sample imaged with SIM and converted to a maximum intensity Z projection, arrow indicates a granule Figure 3: AML bone marrow aspirate sample imaged with a brightfield light microscope and magnified 100 times, arrows indicate granules Figure 3:. AML bone marrow aspirate sample imaged with a brightfield light microscope and magnified 100 times, arrows indicate granules Disclosures No relevant conflicts of interest to declare.

scholarly journals Relation between leaf number and final leaf area of rye.

1964 ◽  
Vol 12 (1) ◽  
pp. 30-39
Author(s):  
R.F. Hoogland
Keyword(s):  
Leaf Area ◽  
Surface Area ◽  
Correlation Coefficients ◽  
Leaf Number ◽  
Total Leaf Area ◽  
Average Surface ◽  
Flag Leaves ◽  
Average Surface Area ◽  
Number Of Leaves ◽  
The Relationship

In rye cv. Petkus and Zelder the date of emergence of the flag leaves was almost the same for all plants irrespective of the number of leaves (10-13) produced. Correlation coefficients for the relationship between total leaf area and number of leaves were + 0.45 and + 0.44 and for that between number of spikelets per ear and number of leaves + 0.61 and + 0.69 for the 2 varieties, respectively. Average surface area per leaf increased with increasing number of leaves.-R.B. (Abstract retrieved from CAB Abstracts by CABI’s permission)

Modeling of engineering properties for predicting the mass of acid lime fruit (Citrus aurantifolia Swingle)

2020 ◽  
Vol 44 (01) ◽  
pp. 20-28
Author(s):  
V. S. Sonone ◽  
D. A. Pawar ◽  
V. P. Kad ◽  
P. A. Unde
Keyword(s):  
Surface Area ◽  
Geometric Mean ◽  
Engineering Properties ◽  
Mean Values ◽  
Mean Diameter ◽  
Multiple Variable ◽  
Acid Lime ◽  
The Mean ◽  
Packaging Industry ◽  
Area And Volume

Engineering properties and their relationships with mass for Phule Sharbati acid lime cultivar were investigated. Relationship between physical properties of fruits and its mass will create tremendous change in the packaging industry. The mean values of engineering properties such as minor diameter, intermediate diameter, major diameter, geometric mean diameter, sphericity, aspect ratio, mass, surface area, volume and true density were found to be 42.55 mm, 41.20 mm, 40.41 mm, 0.94, 0.94, 38.17g, 49997 mm2, 33322.8 mm3 and 1 g/cc, respectively. Regression models were used to predict the effect of mass of acid lime and classified into two: 1–Single and multiple variable regressions of acid lime mass and dimensional characteristics and 2- Single variable regression for geometric mean diameter, sphericity, surface area and volume. Results indicated that mass modeling of acid lime based on minor diameter was found most appropriate in the first classification. In the second classification, the power-law model was noticed best on the basis of the geometric mean diameter, surface area and the volume.

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