scholarly journals MRI Before Biopsy Correlates With Depth of Invasion Corrected for Shrinkage Rate of the Histopathological Specimen in Tongue Carcinoma

2021 ◽  
Author(s):  
Hiroyuki Harada ◽  
Hirofumi Tomioka ◽  
Hideaki Hirai ◽  
Takeshi Kuroshima ◽  
Yu Oikawa ◽  
...  
Keyword(s):  
Formalin Fixation ◽  
Shrinkage Rate ◽  
Specimen Preparation ◽  
Depth Of Invasion ◽  
Regression Equations ◽  
Preparation Process ◽  
Strongly Correlated ◽  
Tongue Carcinoma ◽  
Correct Formula

Abstract The purpose of this study was to evaluate which radiological depth of invasion (r-DOI) measurement is the most concordant to clinical DOI (c-DOI) derived from correction for the shrinkage rate of the histopathological specimens.We retrospectively reviewed 128 patients with tongue carcinoma who had undergone glossectomy between 2006 and 2019. At first, the width shrinkage rate during formalin fixation and preparation process of histopathological specimens was evaluated. From the shrinking rates, a formula to calculate c-DOI from pathological DOI (p-DOI) was developed. The correlation between c-DOI and r-DOI was evaluated.The specimen shrinkage rate during the histopathological specimen preparation process was 10.3%. Based on that, we yielded the correct formula for c-DOI based on p-DOI and preparation shrinkage rate: c-DOI = p-DOI × 100/89.7. The regression equations for the association of c-DOI with r-DOI measured by ultrasound (n = 128), MRI before biopsy (n = 18), and MRI after biopsy (n = 110) were y = 1.12 * x + 0.21, y = 0.89 * x − 0.26, and y = 0.52 * x + 2.63, respectively, while the coefficients of determination were 0.664, 0.891, and 0.422, respectively. In conclusion, r-DOI using MRI before biopsy most strongly correlated with c-DOI.

Assessment of the Effects of Environmental Factors on the Response of Wheat to Fertilizer in On-farm Trials in a Mediterranean Type Environment

1996 ◽  
Vol 32 (3) ◽  
pp. 339-349 ◽  
Author(s):  
M. Pala ◽  
A. Matar ◽  
A. Mazid
Keyword(s):  
Seasonal Rainfall ◽  
Fertilizer Treatment ◽  
Regression Equations ◽  
Strongly Correlated ◽  
Soil Mineral ◽  
Wheat Grain ◽  
Soil Mineral Nitrogen ◽  
Fertilizer Rate ◽  
On Farm ◽  
Fertilizer Rates

SUMMARYA series of researcher-managed wheat fertilizer trials was conducted on representative farmers' fields across northwest Syria between 1986 and 1990. Wheat grain and straw yields were strongly correlated with seasonal (October-May) rainfall, almost irrespective of soil fertility, crop sequence or fertilizer rate, with a highly significant response to nitrogen fertilizer which increased with increasing rainfall and decreasing initial soil mineral-nitrogen values. These results were summarized in regression equations which express yield in terms of fertilizer rates, seasonal rainfall and their interactions. The equations with applied nitrogen and seasonal rainfall were the most appropriate for determining fertilizer needs. Economic analysis indicated that all fertilizer treatment rates were profitable under existing price conditions and that fertilizer use would still be beneficial for a nitrogen price up to three times higher than that of the price of grain (weight for weight) with a seasonal rainfall of 250 mm, and up to six times higher with a seasonal rainfall of 450 mm.

Depth of invasion in superficial oral tongue carcinoma quantified using intraoral ultrasonography

2018 ◽  
Vol 128 (12) ◽  
pp. 2778-2782 ◽  
Author(s):  
Yoshiyuki Iida ◽  
Tomoyuki Kamijo ◽  
Kimihide Kusafuka ◽  
Katsuhiro Omae ◽  
Yukio Nishiya ◽  
...  
Keyword(s):  
Depth Of Invasion ◽  
Tongue Carcinoma ◽  
Oral Tongue

scholarly journals Evaluating Curb Inlet Efficiency for Urban Drainage and Road Bioretention Facilities

Water ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 851 ◽  
Author(s):  
Li ◽  
Fang ◽  
Chen ◽  
Gong ◽  
Wang ◽  
...  
Keyword(s):  
Overland Flow ◽  
Flow Simulation ◽  
Linear Regression Method ◽  
Urban Drainage ◽  
Regression Equations ◽  
Strongly Correlated ◽  
Wide Range ◽  
Input Parameters ◽  
Longitudinal Slope ◽  
Two Dimensional Flow

An updated two-dimensional flow simulation program, FullSWOF-ZG, which fully (Full) solves shallow water (SW) equations for overland flow (OF) and includes submodules modeling infiltration by zones (Z) and flow interception by grate-inlet (G), was tested with 20 locally depressed curb inlets to validate the inlet efficiency (Eci), and with 80 undepressed curb inlets to validate the inlet lengths (LT) for 100% interception. Previous curb inlet equations were based on certain theoretical approximations and limited experimental data. In this study, 1000 road-curb inlet modeling cases from the combinations of 10 longitudinal slopes (S0, 0.1–1%), 10 cross slopes (Sx, 1.5–6%), and 10 upstream inflows (Qin, 6–24 L/s) were established and modeled to determine LT. The second 1000 modeling cases with the same 10 S0 and 10 Sx and 10 curb inlet lengths (Lci, 0.15–1.5 m) were established to determine Eci. The LT and Eci regression equations were developed as a function of input parameters (S0, Sx, and Qin) and Lci/LT with the multiple linear regression method, respectively. Newly developed regression equations were applied to 10,000 inlet design cases (10 S0, 10 Sx, 10 Qin, and 10 Lci combinations) and comprehensively compared with three equations in previous studies. The 100% intercepted gutter flow (Qg100) equations were derived, and over-prediction of Qg100 from previous methods was strongly correlated to smaller S0. Newly developed equations gave more accurate estimations of LT and Eci over a wide range of input parameters. These equations can be applied to designing urban drainage and road bioretention facilities, since they were developed using a large number of simulation runs with diverse input parameters, but previous methods often overpredict the gutter flow of total interception when the longitudinal slope S0 is small.

RADIOLOGIC- PATHOLOGIC CORRELATION OF DEPTH OF INVASION IN TONGUE CARCINOMA

2021 ◽  
pp. 27-28
Author(s):  
Pranay Bhandari ◽  
Ashwin Rangole ◽  
Tanuj Shrivastava ◽  
Ameya Bihani ◽  
Pratiksha Pawar
Keyword(s):  
Basement Membrane ◽  
Normal Mucosa ◽  
P Value ◽  
Depth Of Invasion ◽  
Tongue Carcinoma ◽  
Adjacent Normal Mucosa ◽  
Dence Interval ◽  
The Mean ◽  
Group 2 ◽  
Paired T Test

Introduction: th In tongue carcinoma according to AJCC 8 guidelines depth of invasion is included in staging, therefore there is need of imaging which can accurately assess the pretreatment stage of tumor. The objective of this study was to correlate the depth of invasion reporting by MRI and postoperative HPR. Methods: In MRI DOI was measured by drawing perpendicular lines from the reference line to the point of maximal tumor projection in the tongue medially, histologically DOI was measured from the level of the basement membrane of the closest adjacent normal mucosa. Results: Paired t test was done on the DOI of MRI and HPR. The two tailed P value is less than 0.0001. This difference is considered to be extremely statistically signicant. The mean of group one (DOI-MRI) minus Group 2 (DOI-HPR) equals 6.860. 95% condence interval of this difference is from 5.200 to 8.520. Conclusion: In our study we nd there is statiscally signicant difference between DOI reports in MRI and postoperative HPR.

Influence of Mechanical Properties of Lightweight Silk Fabrics on Seam Shrinkage

2011 ◽  
Vol 331 ◽  
pp. 119-122
Author(s):  
Qiao Ying Wu ◽  
Wen Bin Zhang
Keyword(s):  
Mechanical Properties ◽  
Shrinkage Rate ◽  
Regression Equations ◽  
Light Weight ◽  
Silk Fabric ◽  
Bending Rigidity ◽  
Silk Fabrics ◽  
Main Factor

The purpose of this article is to study the effects of mechanical properties on seam shrinkage of lightweight silk fabrics. Thirty five silk fabrics are used for experiment. Mechanical properties of the fabrics on warp and weft directions were tested by FAST instrument. Seam shrinkage rate were tested. Curve regressions were used to analyze the influence of mechanical properties on seam shrinkage. The results showed that the bending rigidity and extensibility were closely correlated with the seam shrinkage rate, while the formability and rigidity were not the main factor of affecting the seam shrinkage of the light-weight silk fabric. The regression equations of bending rigidity and seam shrinkage rate, extensibility and seam shrinkage rate were obtained.

Indirect Methods to Predict the Abrasion Resistance and Slake Durability of Marbles

2017 ◽  
Vol 05 (02) ◽  
pp. 1750007 ◽  
Author(s):  
Ahmed Abd El Aal ◽  
Sair Kahraman
Keyword(s):  
Abrasion Resistance ◽  
Building Materials ◽  
Point Load ◽  
Index Formula ◽  
Regression Equations ◽  
Strongly Correlated ◽  
Indirect Methods ◽  
Point Load Index ◽  
Slake Durability ◽  
Indirect Tests

Marble has been widely used as building materials since ancient times. Abrasion resistance and slake durability are the important characteristics of marbles. The prediction of these marbles properties will be useful from indirect methods especially for preliminary studies. In this study, the predictability of the Böhme abrasion resistance (BA) and the slake durability (SDI) of marbles were investigated from the indirect methods such as point load index ([Formula: see text], Shore hardness index (SHI), impact strength index (ISI), and ultrasonic velocity ([Formula: see text]). The evaluation of the test results showed that the SDI were correlated well to the [Formula: see text], and moderately correlated to the [Formula: see text]. But, the SDI was correlated weakly to both the ISI and SHI values. On the other hand, all indirect tests values were strongly or very strongly correlated to the BA values. Some multiple regression equations were also derived for the estimation of the SDI and the BA. It can be concluded that the SDI of the tested and similar marbles can be predicted from the [Formula: see text], and [Formula: see text] values. The correlations between the SDI and both SHI and ISI values should be further investigated. Another conclusion is that dry [Formula: see text], ISI, SHI and [Formula: see text] values can be used for the prediction of the BA values of the tested and similar marbles.

scholarly journals Allometric equation for aboveground biomass estimation in moist Afromontane forest in Gesha and Sayilem district in Kaffa zone, southwestern Ethiopia

2020 ◽  
Author(s):  
Admassu Merti ◽  
Teshome Soromessa ◽  
Tura Bareke
Keyword(s):  
Wood Density ◽  
Aboveground Biomass ◽  
Allometric Equation ◽  
Allometric Equations ◽  
Individual Species ◽  
Biomass Estimation ◽  
Regression Equations ◽  
Strongly Correlated ◽  
Afromontane Forest ◽  
Species Specific

Abstract Background: Allometric equations which are regressions linking the biomass to some independent variables are used to estimate tree components from the forest. The generic equation developed by many authors may not adequately reveal the tree biomass in a specific region in tropics including in Ethiopia. Therefore, the use of species specific allometric equations is important to achieve higher levels of accuracy because trees of different species may differ. The objective of the study was to develop species-specific allometric equations for Apodytes dimidiata, Ilex mitis, Sapium ellipticum and shrubs (Galiniera saxifraga and Vernonia auriculifera) using semi-destructive method for estimating the aboveground biomass (AGB). For purpose of sampling trees, individual species were categorized into trees whose Diameter at breast height (DBH) is ≥ 5 cm.Results: All the necessary biomass calculations were done, and biomass equations were developed for each species. The regression equations relate AGB with DBH, height (H), and density (ρ) were computed and the models were tested for accuracy based on observed data. The best model was selected based higher adj R2 and lower residual standard error and Akaike information criterion than rejected models. The relations for all selected models are significant (p<0.000), which showed strong correlation AGB with selected dendrometric variables. Accordingly, the AGB was strongly correlated with DBH and was not significantly correlated with wood density and height individually in Ilex mitis. In combination, AGB was strongly correlated with DBH, height; DBH and wood density; are better for carbon assessment than general equations.Conclusions: The specific allometeric equation developed for the Gesha-Sayilem Afromontane Forest which can be used in similar moist forests in Ethiopia for the implementation of Reduced Emission from Deforestation and Degradation (REDD+) activities to benefit the local communities from carbon trade.

A standard method for the preparation of polymers and plastics for microstructural examination by grinding and polishing techniques

1996 ◽  
Vol 54 ◽  
pp. 194-195
Author(s):  
M.E. Cavaleri ◽  
D.S. Seitz
Keyword(s):  
Standard Method ◽  
Manufacturing Processes ◽  
Specimen Preparation ◽  
Preparation Process ◽  
Complete Understanding ◽  
Polymers And Plastics ◽  
Industrial Manufacturing ◽  
Timely Fashion ◽  
Microstructural Examination ◽  
Grinding And Polishing

One of the fundamental objectives of microstructural examination of manufactured materials is to gain a more complete understanding of the relationships between the manufacturing processes, the microstructure and texture of the material, and the product's performance. This objective, however, can only be achieved if the examination specimens are repeatably produced and are free of thermal, mechanical and chemical alterations, as well as artifacts, damage, or defects resulting from the specimen preparation process. It is also imperative that surface finish of the specimen be appropriate for the microscopical techniques to be used. The preparation process must provide specimens in a timely fashion, generally within a few tens of minutes or at most a few hours for typical industrial/manufacturing situations. Although designed for much harder more rigid materials, the general grinding and polishing techniques used in petrographic and metallographic specimen preparation can also be used for plastics and polymers. ASTM Committee E-4 on Metallography has a task group (TG-E04.01.05) which is preparing a standard guide for the preparation of polymeric specimens based on the ASTM E3-95 standard.

Effect of feline skin specimen preparation on postexcision and postfixation tissue shrinkage

2016 ◽  
Vol 18 (12) ◽  
pp. 970-975 ◽  
Author(s):  
Marije Risselada ◽  
Kyle G Mathews ◽  
Emily Griffith
Keyword(s):  
Donor Site ◽  
Formalin Fixation ◽  
Specimen Preparation ◽  
Preparation Technique ◽  
Significant Difference ◽  
Muscle Fascia ◽  
Deep Margin ◽  
Lateral Margins ◽  
Tissue Specimens ◽  
Four Quadrant

Objectives This study was performed to assess skin–muscle–fascia specimen shrinkage and donor site changes, and to compare three techniques of specimen preparation for their effect on specimen shrinkage postexcision and after formalin fixation in feline cadaveric specimens. Methods Fifteen fresh feline cadavers were used for this study. Gelatin spheres were implanted in paired thoracic subcutaneous pockets and subsequently excised with 30 mm lateral margins and a fascial plane as the deep margin. Skin and fascia were either left unsutured, sutured together using four simple interrupted quadrant sutures (‘four-quadrant-sutured’) or sutured together in a continuous pattern (‘circumferentially sutured’). Specimens were measured for tumor-free margins on the excised and fixed specimens. The donor site defect was assessed for enlargement after specimen excision. Statistical analyses were performed to assess the donor site enlargement, and the influence of preparation technique on margin size, with significance set at P <0.05. Results The closest skin margins on the excised and fixed specimens were significantly smaller than the planned 30 mm margins; however, no significant difference was found between postexcision and postfixation specimens. No significant differences were found between the three techniques ( P = 0.74) with regard to margins either after excision or fixation. The fascial and skin defects of the donor site were significantly larger than the planned excision. Conclusions and relevance Surgically obtained feline skin–muscle–fascia specimens will significantly decrease in size prior to formalin fixation, resulting in falsely decreased measurements from tumor to tissue margins. Affixing the skin to the fascia does not significantly influence this decrease in margin size in feline tissue specimens at this location.

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