Follicle Microstructure and Innervation Vary between Pinniped Micro- and Macrovibrissae

2016 ◽  
Vol 88 (1) ◽  
pp. 43-58 ◽  
Author(s):  
Erin E. Mattson ◽  
Christopher D. Marshall
Keyword(s):  
Cross Section ◽  
Hair Shaft ◽  
Silver Stain ◽  
Cross Sectional ◽  
Aquatic Mammal ◽  
Pagophilus Groenlandicus ◽  
Histological Data ◽  
The Mean ◽  
Capsule Thickness ◽  
The Relationship

Histological data from terrestrial, semiaquatic, and fully aquatic mammal vibrissa (whisker) studies indicate that follicle microstructure and innervation vary across the mystacial vibrissal array (i.e. medial microvibrissae to lateral macrovibrissae). However, comparative data are lacking, and current histological studies on pinniped vibrissae only focus on the largest ventrolateral vibrissae. Consequently, we investigated the microstructure, medial-to-lateral innervation, and morphometric trends in harp seal (Pagophilus groenlandicus) vibrissal follicle-sinus complexes (F-SCs). The F-SCs were sectioned either longitudinally or in cross-section and stained with a modified Masson's trichrome stain (microstructure) or Bodian's silver stain (innervation). All F-SCs exhibited a tripartite blood organization system. The dermal capsule thickness, the distribution of major branches of the deep vibrissal nerve, and the hair shaft design were more symmetrical in medial F-SCs, but these features became more asymmetrical as the F-SCs became more lateral. Overall, the mean axon count was 1,221 ± 422.3 axons/F-SC and mean axon counts by column ranged from 550 ± 97.4 axons/F-SC (medially, column 11) to 1,632 ± 173.2 axons/F-SC (laterally, column 2). These values indicate a total of 117,216 axons innervating the entire mystacial vibrissal array. The mean axon count of lateral F-SCs was 1,533 ± 192.9 axons/ F-SC, which is similar to values reported in the literature for other pinniped F-SCs. Our data suggest that conventional studies that only examine the largest ventrolateral vibrissae may overestimate the total innervation by ∼20%. However, our study also accounts for variation in quantification methods and shows that conventional analyses likely only overestimate innervation by ∼10%. The relationship between axon count and cross-sectional F-SC surface area was nonlinear, and axon densities were consistent across the snout. Our data indicate that harp seals exhibit microstructural and innervational differences between their microvibrissae (columns 8-11) and macrovibrissae (columns 1-7). We hypothesize that this feature is conserved among pinnipeds and may result in functional compartmentalization within their mystacial vibrissal arrays.

scholarly journals Relationship between Body Mass Index and Tooth Decay in a Population of 3–6-Year-Old Children in Iran

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Leila Shafie Bafti ◽  
Maryam Alsadat Hashemipour ◽  
Hamidreza Poureslami ◽  
Zeinab Hoseinian
Keyword(s):  
Body Weight ◽  
Analytical Study ◽  
Deciduous Teeth ◽  
Tooth Decay ◽  
Cross Sectional ◽  
Dmft Index ◽  
The Mean ◽  
Iranian Children ◽  
The Relationship

The aim of the present study was to evaluate the relationship between BMI and tooth decay in a population of Iranian children. In this cross-sectional descriptive/analytical study, 1482 children were selected from kindergartens and preschool centers in Kerman, Iran. The children underwent examination of deciduous teeth (using the dmft index) after determination of height and weight for calculation of BMI. The relationship between BMI (after adjustment for age) and dmft was determined using Poisson’s regression model. The mean of dmft in children with normal BMI was 1.5-fold that in subjects with extra body weight. Age had a significant effect on dmft. In addition, dmft was higher in boys compared to girls. The results of the present study showed that caries rate in the deciduous teeth of 3–6-year-old children decreases with an increase in body weight.

The relationship between workload and adherence to professional codes of ethics among a sample of Iranian nurses

2021 ◽  
pp. 147775092110401
Author(s):  
Mahsa Dadkhah-Tehrani ◽  
Mohsen Adib-Hajbaghery
Keyword(s):  
Personal Characteristics ◽  
Codes Of Ethics ◽  
Spearman Correlation ◽  
Cross Sectional ◽  
Significant Difference ◽  
Perceived Workload ◽  
Professional Codes ◽  
The Mean ◽  
Professional Codes Of Ethics ◽  
The Relationship

Background Many studies have investigated the adherence to professional codes of ethics by nurses. However, no study has explicitly examined the relationship between workload and adherence to professional codes of ethics among Iranian nurses. Objective This study aimed to explore the relationships between workload and adherence to professional codes of ethics among a sample of Iranian nurses. Materials and Methods A cross-sectional descriptive study was conducted on 213 nurses who were randomly selected from the different wards of Shahid Beheshti Hospital of Kashan, Iran. Data collection instruments included a personal characteristics questionnaire, the Nursing Ethics Questionnaire, and the National Aeronautics and Space Administration Task Load Index. The Chi-square, the Spearman correlation coefficient, the Kruskal–Wallis, and Mann–Whitney U tests were used to analyze the data. Results A majority of nurses were females (77.5%), married (79.3%), and permanently employed (55.4%). The mean of the overall perceived workload and adherence to professional codes of ethics were 76.36 ± 13.64 and 13.98 ± 2.58, that were at high and moderated level, respectively. Spearman correlation test showed no significant correlation between perceived workload and adherence to professional codes of ethics ( r = 0.03, P = 0.6). A significant difference was found between the mean scores of adherence to professional codes of ethics in nurses working in different departments ( P < 0.001). Conclusion Participating nurses perceived high levels of workload but their mean adherence to professional codes of ethics was at a moderate level. The perceived workload was indirectly correlated with adherence to professional codes of ethics.

scholarly journals The relationship between hopelessness and perceived social support levels of parents with children with congenital heart disease

2021 ◽  
Vol 8 (11) ◽  
pp. 655-661
Author(s):  
Tugba Nur Oden ◽  
Rahsan Cam
Keyword(s):  
Social Support ◽  
Congenital Heart Disease ◽  
Heart Disease ◽  
Congenital Heart ◽  
Perceived Social Support ◽  
Significant Negative Correlation ◽  
Cross Sectional ◽  
The Family ◽  
The Mean ◽  
The Relationship

Objective: This study was conducted to evaluate the relationship between hopelessness and perceived social support levels of parents with children with congenital heart disease (CHD). Material and Methods: This cross-sectional study was conducted with parents of children who underwent surgery for CHD, and data were collected from 100 parents who agreed to participate in the study. A descriptive information form for the sociodemographic characteristics of the parents, “Beck Hopelessness Scale (BHS)” and “Multidimensional Scale of Perceived Social Support (MSPSS)” were used to collect the data. Data were analysed using descriptive statistics and Spearman’s correlation tests. Results: The mean score of the hopelessness level of the parents participating in the study was 6.15±4.23, and the mean perceived general social support score was 69.55±15.47. There was a significant negative correlation between the hopelessness levels of mothers and social support (SS) received from the family, from significant others, and general SS scores. There was a significant positive correlation between the hopelessness levels of the mothers and the SS level received from the family (p<0.05). Conclusion: In this study, the parents of children with CHD have low levels of hopelessness and perceived SS levels are high. Moreover, the relationship between hopelessness and perceived SS levels varies according to the sex of the parents. In our study, the SS level of mothers had a higher effect on the hopelessness level. It is recommended that the SS levels of the parents of children with CHD should be increased to help them cope with hopelessness.

scholarly journals Red meat and egg intake and serum ferritin concentrations in Colombian children: results of a population survey, ENSIN-2015

2020 ◽  
Vol 9 ◽  
Author(s):  
Oscar F. Herran ◽  
Jhael N. Bermúdez ◽  
María Del Pilar Zea
Keyword(s):  
Serum Ferritin ◽  
Serum Ferritin Level ◽  
Ferritin Level ◽  
Red Meat ◽  
Cross Sectional ◽  
Egg Consumption ◽  
Dietary Consumption ◽  
The Mean ◽  
The Relationship ◽  
Meat And Eggs

Abstract The present study aimed to (a) establish the frequency of consumption of red meat and eggs; (b) determine serum ferritin levels (μg/l); and (c) establish the relationship between serum ferritin and the consumption of red meat and eggs. In Colombia during 2014–2018, an analytical study was conducted in 13 243 Colombian children between the ages of 5 and 17 years, based on cross-sectional data compiled by ENSIN-2015 (Encuesta Nacional de la Situación Nutricional en Colombia-2015) on serum ferritin levels and dietary consumption based on a questionnaire of the frequency of consumption. Using simple and multiple linear regression, with the serum ferritin level as the dependent variable and the frequency of consumption as the main explanatory variable, the crude and adjusted partial regression coefficients (β) between serum ferritin levels and consumption were calculated. The frequency of habitual consumption of red meat was 0⋅49 (95 % CI 0⋅47, 0⋅51) times/d. The frequency of habitual egg consumption was 0⋅76 (95 % CI 0⋅74, 0⋅78) times per d. The mean serum ferritin level in men was 41⋅9 (95 % CI 40⋅6, 43⋅1) μg/l and in women, 35⋅7 (95 % CI 34⋅3, 37⋅7) μg/l (P < 0⋅0001). The adjusted β between the consumption of red meat and eggs and serum ferritin levels were β = 3⋅0 (95 % CI 1⋅2, 4⋅7) and β = 2⋅5 (95 % CI 1⋅0, 3⋅9) for red meat and eggs, respectively. In conclusion, red meat and eggs are determinants of serum ferritin levels in Colombia and, therefore, could be considered public policy options to reduce anaemia and Fe deficiency.

Evaluation of corallite size as a criterion for species discrimination in favositids

1988 ◽  
Vol 62 (1) ◽  
pp. 32-40 ◽  
Author(s):  
D. J. Lee ◽  
J. P. A. Noble
Keyword(s):  
Cross Section ◽  
Statistical Treatment ◽  
Intraspecific Variability ◽  
West Point ◽  
Species Discrimination ◽  
Cross Sectional ◽  
The Best Approximation ◽  
Computer Based ◽  
The Mean ◽  
Upper Silurian

Of all the morphologic characters used in favositid taxonomy, corallite size has most frequently been given more weight than others because of its relative ease of measurement and because it has been generally believed to be less variable. This study evaluates the reliability of corallite size as a criterion by a statistical treatment of several populations of favositids in the Upper Silurian West Point Reef Complex in Gaspé, Québec. Calculation of corallite cross-sectional area was made feasible by computer-based image analysis which provides a quick and accurate measure of size. The present study shows that the mean of the largest 10 percent corallite areas in mature parts of colonies with a minimum sample size of 100 corallites per cross section is the best approximation available of mean adult corallite size.It is suggested that intraspecific variability of corallite size is often too large for this character to be used in practice, probably due to phenotypic plasticity. The same may be true of most other morphologic characters. In some cases, however, one or two characters remain invariate within a species and can be used diagnostically. The same characters may be extremely variable in other species.

scholarly journals Bone tissue amount related to upper incisors inclination

2013 ◽  
Vol 84 (2) ◽  
pp. 279-285 ◽  
Author(s):  
Ana Carla Raphaelli Nahás-Scocate ◽  
Aluana de Siqueira Brandão ◽  
Mayara Paim Patel ◽  
Michel Eli Lipiec-Ximenez ◽  
Israel Chilvarquer ◽  
...  
Keyword(s):  
Bone Tissue ◽  
Pearson Correlation ◽  
Cervical Region ◽  
Apical Region ◽  
Middle Region ◽  
Central Incisor ◽  
Cross Sectional ◽  
Strong Linear Correlation ◽  
The Mean ◽  
The Relationship

ABSTRACT Objective: To evaluate the amount of buccal and lingual supporting bone tissue of 60 upper central incisors and the relationship with their inclination. Materials and Methods: Thirty healthy adult patients with no previous orthodontic treatment were evaluated using cone-beam computed tomography. Cross-sectional views were analyzed to check the amount of the bone tissue on the cervical (cervical buccal thickness/CBT; lingual/CLT), middle (middle buccal thickness/MBT; lingual/MLT), and apical regions (apical buccal thickness/ABT; lingual/ALT). The Pearson correlation, linear regression, and analysis of variance tests were used (P &lt; .05). Results: The values of ABT of both teeth (11, right upper central incisor; 21, left upper central incisor) were significantly increased with the increase in the angle between the axis of the upper central incisor and the palatal plane (1/PP) (tooth 11 P  =  .034; tooth 21 P  =  .009), yet without a strong linear correlation. At the buccal and lingual surfaces, the mean apical supporting bone tissue was significantly greater than the other areas, and the middle region significantly greater than the cervical (P &lt; .001). Conclusions: For both surfaces (buccal and lingual), the amount of bone tissue in the apical region was significantly higher than the middle and cervical regions, and the middle region was significantly higher than the cervical region. In relation to the upper central incisor's inclination, the higher the 1/PP the higher was ABT. However, the coefficient values for both teeth were low.

Mechanical properties and dimensions of the major pulmonary arteries

1960 ◽  
Vol 15 (1) ◽  
pp. 92-96 ◽  
Author(s):  
Dali J. Patel ◽  
Donald P. Schilder ◽  
Alexander J. Mallos
Keyword(s):  
Pulmonary Artery ◽  
Pulse Pressure ◽  
Technical Assistance ◽  
Main Pulmonary Artery ◽  
Pulmonary Arteries ◽  
Cross Sectional ◽  
Measurement Control ◽  
The Mean ◽  
The Right ◽  
The Relationship

The relationship between instantaneous distending pressure and diameter of the pulmonary artery was studied in 18 living thoracotomized dogs. An electrical caliper with adequate recording characteristics was developed for instantaneous diameter measurement. Control observations were made over a range of pressures induced by rapid, right heart dextran-infusion and were compared with those obtained during norepinephrine administration. Results indicate: a) the pulse contours of the pulmonary artery pressure and diameter are essentially identical, indicating negligible inertance and viscous resistance of the vessel wall, b) the mean change in average radius during a cardiac cycle was ±7.8% ± 2.86 S.D. ± .32 S.E.M. (0.48%/cm H2O pulse pressure) under control conditions, c) the ratio of change in radius to pulse pressure, R/P, showed a significant decrease during norepinephrine administration when compared to control values within the same pressure range (P < .01) and d) the cross-sectional area of the main pulmonary artery exceeded that of the right and left combined. Note: (With the Technical Assistance of Alfred G. T. Casper) Submitted on August 25, 1959

The Correlation Between Arterial Lactate and Venous Lactate in Patients With Sepsis and Septic Shock

2016 ◽  
Vol 33 (2) ◽  
pp. 116-120 ◽  
Author(s):  
Pongdhep Theerawit ◽  
Chalermpon Na Petvicharn ◽  
Viratch Tangsujaritvijit ◽  
Yuda Sutherasan
Keyword(s):  
Characteristic Curve ◽  
Cross Sectional Study ◽  
University Hospital ◽  
Strongly Correlated ◽  
Cross Sectional ◽  
Arterial Lactate ◽  
Paired Samples ◽  
The Mean ◽  
Sepsis And Septic Shock ◽  
The Relationship

Background: Applying peripheral venous lactate instead of arterial lactate in clinical practice is questionable because of deviation between both values. We aimed to find the relationship between the arterial lactate and the peripheral venous lactate before reasoned that the venous lactate could be used in substitution to the arterial lactate in sepsis. Methods: We conducted a prospective, cross-sectional study at a university hospital. The patients with sepsis in ICU who required lactate level monitoring were enrolled in this research. The correlation and agreement between arterial lactate (A-LACT) and peripheral venous lactate (V-LACT) were the primary outcomes. Results: A total of 63 paired samples were collected. The A-LACT and V-LACT were strongly correlated ( r = .934, P < .0001, r2 = .873). The regression equation was A-LACT = (0.934 × V-LACT) − 0.236. The mean difference between V-LACT and A-LACT was 0.66 ± 1.53 mmol/L. The 95% limits of agreement were between −3.66 and 2.33 mmol/L. The V-LACT ≥ 4 mmol/L can predict A-LACT level ≥ 4 mmol/L with 87.5% sensitivity and 91.5% specificity, and the area under receiver operating characteristic curve was 0.948. Conclusion: The present study demonstrated a strong correlation between A-LACT and V-LACT, but an agreement between both parameters was poor. We suggest not to use the V-LACT in substitution to the A-LACT in sepsis regarding the absolute value and clearance rate, but the V-LACT ≥ 4.5 mmol/L may be used for predicting the A-LACT ≥ 4 mmol/L.

scholarly journals The Impact of using social media in a sample of Iraqi medical students in 2019

2020 ◽  
Vol 1 (1) ◽  
Author(s):  
Ali Almawashee ◽  
Qaswer Yousif ◽  
Karrar Ali Idan
Keyword(s):  
Social Media ◽  
Medical Students ◽  
Online Survey ◽  
Educational Values ◽  
Research Committee ◽  
Cross Sectional ◽  
The Mean ◽  
Use Of Social Media ◽  
The Impact ◽  
The Relationship

Abstract Background:  Social media are tools that supports electronic conversation. suggested , social media are “a group of internet-based applications that build on the ideological and technological foundations of Web 2.0, that allow the creation and exchange of User Generated Content. Aim of the study: Is to identify the pattern of usage of social media among a sample of Iraqi medical students including the devices used, the time consumed, and   the purpose of usage. Materials &Methods: The study, which is a retrospective cross-sectional, was conducted among medical students at college of Medicine\Baghdad University at 2019 as an online survey for duration of 3 months Data was entered and analyzed using spss version 24.Informed consent was obtained from the participants and the study was approved by the research committee in the college. Results The mean age of the participants in this study was 20.8 with sd 1.78. Results had shown no significant association between the usefulness of social media for educational values and type of social media, device used, and the time spent on these media. Results had shown that those who use social media more frequently were not significantly worried about the potential of social media abuse. Conclusions A study exploring more objectively the relationship between students’ use of social media with their academic achievements and what sort of social media interventions associated with better learning are probably needed. Such knowledge may be useful to guide medical educators to better utilize social media in their instructional strategies.

scholarly journals The relationship between body mass index before pregnancy and the amount of weight that should be gained during pregnancy: A cross-sectional study

2019 ◽  
Vol 35 (5) ◽  
Author(s):  
Resmiye Özdilek ◽  
Yılda Arzu Aba ◽  
Sena Dilek Aksoy ◽  
Bulat Aytek Şık ◽  
Yaşam Kemal Akpak
Keyword(s):  
Body Mass Index ◽  
Weight Gain ◽  
Pregnant Women ◽  
Body Mass ◽  
Cross Sectional Study ◽  
Sectional Study ◽  
Cross Sectional ◽  
The Mean ◽  
The Relationship

Objective: To investigate the adaptation of pregnant women to the recommended weight gain range according to body mass index (BMI) and to determine the factors affecting them. Methods: This cross-sectional study was performed in a university hospital’s obstetrics and gynecology unit (tertiary center) in Turkey. This study was conducted between March 2018 and August 2018 (6 months) in pregnant women. Pregnant women with chronic disease and receiving treatment during antenatal follow-up, with twin pregnancy, with a fetus with a congenital abnormality, and nutritional disturbance were excluded from the study. Eight hundred twelve pregnant women with normal antenatal follow-up and who volunteered to participate were included in the study. Results: The mean age of the participants was 27.66±5.05 years. The mean weight and BMI before pregnancy were near standard in all participants. The group with the highest rate of recommended weight gain according to BMI before pregnancy was the group with low weight pregnant women. The ideal weight gain rate in all groups was 32%. Conclusions: The groups with overweight and obese pregnant women according to BMI before pregnancy had the highest rates of weight gain, above the recommended limits. BMI before pregnancy directly affects weight gain during pregnancy and the importance of pre-pregnancy counseling and weight loss is emphasized once again. doi: https://doi.org/10.12669/pjms.35.5.133 How to cite this:Ozdilek R, Aba YA, Aksoy SD, Sik BA, Akpak YK. The relationship between body mass index before pregnancy and the amount of weight that should be gained during pregnancy: A cross-sectional study. Pak J Med Sci. 2019;35(5):---------.  doi: https://doi.org/10.12669/pjms.35.5.133 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Sign in / Sign up

Export Citation Format

Share Document