scholarly journals Range, sexual dimorphism and bilateral asymmetry of rostral tooth counts in the smalltooth sawfish Pristis pectinata Latham (Chondrichthyes: Pristidae) of the southeastern United States

Zootaxa ◽  
2008 ◽  
Vol 1810 (1) ◽  
pp. 51 ◽  
Author(s):  
TONYA R. WILEY ◽  
COLIN A. SIMPFENDORFER ◽  
VICENTE V. FARIA ◽  
MATTHEW T. MCDAVITT
Keyword(s):  
United States ◽  
Sexual Dimorphism ◽  
Southeastern United States ◽  
Museum Collections ◽  
Bilateral Asymmetry ◽  
Mean Values ◽  
Significant Difference ◽  
Taxonomic Uncertainty ◽  
Left And Right ◽  
Pristis Pectinata

Rostral tooth counts of Pristis pectinata specimens from museum collections, research surveys, and fisheries activities were examined to provide information on sexual dimorphism, bilateral asymmetry, and to aid in the resolution of the taxonomic uncertainty that surrounds the Pristidae. Counts were taken from 105 smalltooth sawfish captured in Florida and Georgia, USA, from 1834 to 2007. The number of rostral teeth present was 22 to 29 per side and 45 to 56 in total. These counts were more constrained, and mean values lower, than historically reported for this species in the literature. Pristis pectinata rostral tooth counts exhibited sexual dimorphism, with males on average having more rostral teeth than females. Bilateral asymmetry in rostral tooth counts was displayed in 73% of individuals, with no consistent side on which the greatest count occurred. No significant difference between left and right side rostral tooth counts was found.

Comparative assessment of odontometric parameters for gender determination: A hospital based cross-sectional study

2021 ◽  
Vol 8 (3) ◽  
pp. 147-152
Author(s):  
Mosmi Lomi ◽  
Jonathan Daniel M
Keyword(s):  
Sexual Dimorphism ◽  
Cross Sectional Study ◽  
Mean Value ◽  
The Body ◽  
Central Incisor ◽  
Maxillary Canine ◽  
Cross Sectional ◽  
Mean Values ◽  
Gender Determination ◽  
Significant Difference

Determining gender is one of the most important procedure in forensics. Teeth are made of the most enduring mineralized tissues in the body, as such, they have an extraordinary resistance to putrefaction and the effects of external agents (physical, thermal, mechanical, chemical or biological) which makes them invaluable material for anthropological, genetic, odontologic and forensic examinations.i)To assess the degree of sexual dimorphism in maxillary canine using maxillary canine index, maxillary first molar and central incisor using mesiodistal (MD) and buccolingual/buccopalatal (BL) dimensions of the crown. ii) To determine the accuracy of maxillary canine index, first molar and central incisor dimensions (mesiodistal and buccolingual/buccopalatal) in determining sex.This study consisted of total 30 participants (males=15, females=15) of age group ranging from 20 to 35 yrs. Measurement of dimensions of selected teeth were performed on maxillary cast using digital Vernier caliper, resolution 0.01mm. Data thus obtained were analyzed statistically.The mean values of all the measurements in males were greater than females. There was statistical significant difference in mean value of bucco-lingual width of molar, mesiodistal width of canine (on left side, right side and average) and the inter-canine distance between males and females. The buccolingual width of molar showed the highest % of sexual dimorphism (5.33%) and the mesiodistal width of molar showed the least % of dimorphism (0.7%). Bucco-lingual width of molar posed the highest prediction accuracy for gender determination. We conclude that buccolingual width of maxillary first molar can be used to predict the gender when only teeth of maxillary arch are available for forensic examination.

Field Evaluation of the MUG Assay for Enumerating Escherichia coli in Seawater and Oysters from Southeastern United States

1991 ◽  
Vol 54 (4) ◽  
pp. 246-248 ◽  
Author(s):  
MILES L. MOTES ◽  
JAMES T. PEELER
Keyword(s):  
United States ◽  
Escherichia Coli ◽  
Southeastern United States ◽  
Field Evaluation ◽  
Fecal Coliforms ◽  
American Public Health Association ◽  
Suitable Alternative ◽  
E Coli ◽  
Significant Difference ◽  
Health Association

Oysters and seawater collected from the southeastern United States were examined for fecal coliforms and Escherichia coli, using the current procedure of the American Public Health Association (APHA) and the fluorogenic 4-methylumbelliferyl-β-D-glucuronide (MUG) modified APHA procedure. After the presence of E. coli in both methods was confirmed by conventional IMViC procedures, there was no significant difference between method means at the α = 0.05 level. In oysters, low confirmation rates of 67 and 77% were observed by the APHA and the MUG methods, respectively. Seawater had the greatest confirmation rates (95%) by the MUG method. The MUG method may be a suitable alternative to the current APHA method for the microbiological evaluation of oysters and seawater.

scholarly journals Dental Sexual Dimorphism

2015 ◽  
Vol 03 (03) ◽  
pp. 135-139
Author(s):  
Manisha Sharma ◽  
Sameer Gupta ◽  
Avdesh Sharma ◽  
Vandana Bhardwaj ◽  
Pooja Sharma ◽  
...  
Keyword(s):  
Sexual Dimorphism ◽  
Forensic Odontology ◽  
Mean Value ◽  
Criminal Proceedings ◽  
Index Method ◽  
Mean Values ◽  
Arch Width ◽  
Significant Difference ◽  
Law And Justice ◽  
Student’S T

Abstract Objective : Forensic odontology is a lineage that deals in relation to jaws and teeth as evidence to law and justice. Tooth serves as a prime importance in the context of sex identification. (1) To investigate whether there exists any correlation between odontometric measures and sexual dimorphism. (2) To compare the inter-canine arch width of mandible. (3) To evaluate the mean value of standard mandibular canine index. Method: This study is an odontometric analysis performed intra-orally with a sample of 150 teeth (75male:75 female) on students of Kanti Devi Dental college, Mathura. Mesiodistal dimensions of mandibular right and left canine with a caliper device and statistical analysis for significance of sexual dimorphism was done with student’s t test. Result: The result showed that sexual dimorphism is significant in relation to mesiodistal diameter of canine. Furthermore, there was statistical significant difference in tooth crown dimension between males and females where the males showed higher mean values. Conclusion: The study show definite statistically significant sexual dimorphism hence they can play significant role in providing expertise in civil & criminal proceedings to ensure that forensic dentistry will remain viable component of forensic medicine.

An Examination of Euro-American and African-American Differences in Social Physique Anxiety among College Women

2005 ◽  
Vol 100 (1) ◽  
pp. 96-98 ◽  
Author(s):  
Eleanor H. Jordan ◽  
Cassandra P. Smisson ◽  
Kevin L. Burke ◽  
A. Barry Joyner ◽  
Daniel R. Czech
Keyword(s):  
Physical Activity ◽  
United States ◽  
African American ◽  
College Women ◽  
Southeastern United States ◽  
Social Physique Anxiety ◽  
College Age ◽  
The Social ◽  
Significant Difference ◽  
Physical Activity Classes

Many studies have examined sex differences in social physique anxiety; however, few researchers have examined possible perceptual differences in such anxiety based on ethnicity. The present purpose was to examine social physique anxiety among college-age women of Euro-American and African-American descent. Participants ( N = 91) from physical activity classes at a university located in the southeastern United States completed the Social Physique Anxiety Scale. The participants were 67 Euro-Americans and 24 African Americans. An independent t test yielded a significant difference ( p = .01) between groups on Eklund's scale, which supports the hypothesis.

scholarly journals Inter-Incisive Index in South Bulgarians and Its Application in Aesthetic Dentistry

2021 ◽  
Author(s):  
Zdravka Harizanova ◽  
Atanas Baltadjiev ◽  
Ferihan Popova ◽  
Marieta Peycheva ◽  
Emre Boyaci
Keyword(s):  
Sexual Dimorphism ◽  
Statistical Significance ◽  
Modern Society ◽  
Dental Arch ◽  
Bilateral Asymmetry ◽  
Maxillary Central Incisor ◽  
The Public ◽  
Maxillary Lateral Incisor ◽  
Left And Right ◽  
Aesthetic Dentistry

Abstract Background: In recent years, aesthetic dentistry has become a major focus for the public. Facial attractiveness plays a key role on modern society and the creation of harmonious smile is an aim for every dentist.The aim of this study was to define certain values of the inter-incisive index in South Bulgarians, the sexual dimorphism and bilateral asymmetry and to verify differences of this index between Bulgarians and other Balkan populations.Materials and methods: The present study included 86 males and 83 females of Bulgarian origin living in South Bulgaria aged 20-40 years. Mesiodistal dimensions of maxillary central and lateral incisors were measured by Dentistry Sliding Vernier Caliper. We used the technique of Martin-Saller, modified by Prof. Y. Yordanov. We calculated the inter-incisive index as ratio of the mesiodistal dimension of maxillary lateral incisor to the mesiodistal dimension of the maxillary central incisor. The measurements were analyzed with SPSS 23. The level of statistical significance was set at P< 0.05. Results: The inter-incisive index showed no statistically significant differences between left and right side of the dental arch in both sexes. We did not find statistically significant differences between males and females as well. On the other hand we found statistically significant differences in MD values of incisors between Bulgarians and other Balkan nations.Conclusion: Inter-incisive index shows no sexual dimorphism and bilateral asymmetry in South Bulgarians. This can be helpful in aesthetic dentistry, in prosthodontics and in orthodontic treatment planning.

scholarly journals Sexual dimorphism of the human corpus callosum: Digital morphometric study

2006 ◽  
Vol 63 (11) ◽  
pp. 933-938 ◽  
Author(s):  
Goran Spasojevic ◽  
Zlatan Stojanovic ◽  
Dusan Suscevic ◽  
Slobodan Malobabic
Keyword(s):  
Sexual Dimorphism ◽  
Magnetic Resonance ◽  
Corpus Callosum ◽  
Surface Area ◽  
Morphometric Study ◽  
Mean Values ◽  
Section Area ◽  
Significant Difference ◽  
Section Surface ◽  
Area And Perimeter

Background/Aim. Changes in the morphology and the size of the corpus callosum, are related to various pathological conditions. An analysis of these changes requires data about sexual dimorphism of the corpus callosum, which we tried to obtain in our study. We also investigated the method of digital morphometry and compared the obtained results with the results of other authors obtained by magnetic resonance imaging or by planimetry. Methods. A morphological research included 34 human brains (cadavers of both sexes ? 19 female and 15 male aged 26?72 years). By digital morphometry using an AutoCAD software we performed measurements in the corpus callosum: the length (L), width in the half of its length (WW?), length of its cortical margin (LCM), area and perimeter of the anterior and posterior callosal segments, as well as the area and perimeter of the corpus callosum section area. The investigated parameters were analyzed and compared between the females and males. Results. There was not a statistically significant difference between the males and females in the investigated parameters of the corpus callosum (t test; p > 0.05), including the mean values of the two most important parameters, the surface of its midsagittal section area (males 654.11 mm2; females 677.40 mm2) and of its perimeter (males 19.61 cm; females 19.72 cm). The results obtained by digital morphometry were in the range of the results of other authors obtained by magnetic resonance and by planimetry. However, the value of Pearson coefficient of linear correlation between the section surface area and perimeter of the corpus callosum in the males was highly significant (rxy = 0.6943, p < 0.01), while in the females this value was statistically insignificant. Conclusion. Digital morphometry is accurate method in encephalometric investigations. Our results suggest that the problem of sexual dimorphism of the corpus callosum is very complex, because the identical variables (section surface area or its perimeter) do not exhibit the same behavior in males and in females, implicating that these variables even cannot be simply compared between the sexes.

scholarly journals Forecasting Reference Evapotranspiration Using Retrospective Forecast Analogs in the Southeastern United States

2012 ◽  
Vol 13 (6) ◽  
pp. 1874-1892 ◽  
Author(s):  
Di Tian ◽  
Christopher J. Martinez
Keyword(s):  
United States ◽  
Relative Humidity ◽  
Solar Radiation ◽  
Reference Evapotranspiration ◽  
Southeastern United States ◽  
Department Of Energy ◽  
Maximum Temperature ◽  
Accurate Estimation ◽  
Hydrologic Simulation ◽  
Mean Values

Abstract Accurate estimation of reference evapotranspiration (ET0) is needed for determining agricultural water demand and reservoir losses and driving hydrologic simulation models. This study was conducted to explore the application of the National Centers for Environmental Prediction’s (NCEP’s) Global Forecast System (GFS) retrospective forecast (reforecast) dataset combined with the NCEP–U.S. Department of Energy (DOE) Reanalysis 2 dataset (R2) to forecast ET0 in the southeastern United States using a forecast analog approach. Seven approaches of estimating ET0 using the Penman–Monteith (PM) and Thornthwaite equations were evaluated by substitution of climatological mean values of variables or by bias correcting variables including solar radiation, maximum temperature, and minimum temperature using the R2 dataset. The skill of both terciles and extremes (10th and 90th percentiles) were evaluated. Overall, for the ET0 forecast approaches that combined R2 solar radiation with temperature, relative humidity, and wind speed from GFS, the reforecasts produced higher skill than methods that estimated parameters using GFS the reforecasts data only. The primary increase in skill was due to the use of relative humidity from the GFS reforecasts and long-term climatological mean values of solar radiation from the R2 dataset, indicating its importance in forecasting ET0 in the region. While the five categorical forecasts were skillful, the skill of upper and lower tercile forecasts was greater than that of lower and upper extreme forecasts and middle tercile forecasts. Most of the forecasts were skillful in the first 5 lead days.

scholarly journals Bilateral asymmetry of pedaling force at different levels of exercise intensity in cycle ergometer

2020 ◽  
Vol 24 (5) ◽  
pp. 264-270
Author(s):  
Lachezar G. Stefanov ◽  
Ivan Ivanov ◽  
Daniela Aleksieva
Keyword(s):  
Exercise Intensity ◽  
Asymmetry Index ◽  
T Test ◽  
Bilateral Asymmetry ◽  
Significant Difference ◽  
Left And Right ◽  
The Difference ◽  
Student’S T ◽  
Different Levels ◽  
Student’S T Test

Background and Study Aim. To investigate how bilateral pedaling asymmetries change at exercises with different levels of intensity. Material and Methods. Eight students of cycling, average age 25.4 years, were investigated. In the experiment, we recorded the pedal force of the right and left legs during three consecutive exercises of different intensity 35%, 55% and 85% respectively.  To quantify the difference in physical parameters of pedaling between the left and right legs, we used two approaches that complement each other in the analysis of bilateral asymmetry. One approach involved determining an asymmetry index, and other was statistical analysis. Results. The Student's t-test indicated that the difference between the power samples for the left and right pedals decreased at 85% exercise intensity vs. 55% with a statistical significance of α = 0.05. The bilateral asymmetry in most cases decreased or in two cases remained unchanged. The cases where there was no statistically significant difference between the power samples for both legs at 85% and 55% intensity levels had the lowest asymmetry index. Conclusions. The bilateral pedaling asymmetry is reduced at 85% exercise intensity compared to the 55% one. The reduction in asymmetry index ranges from 1% to 14.1%, Combining the asymmetry index and the Student's t-test can increase the informativeness of pedaling power data when analyzing bilateral asymmetry.

Sign in / Sign up

Export Citation Format

Share Document