Effect of hematocrit on behavioral thermoregulation of the toad Bufo marinus

1990 ◽  
Vol 258 (4) ◽  
pp. R848-R851 ◽  
Author(s):  
S. C. Wood
Keyword(s):  
Thermal Gradient ◽  
Bufo Marinus ◽  
The Body ◽  
Behavioral Thermoregulation ◽  
Blood Doping ◽  
Cross Sectional ◽  
Oxygen Capacity ◽  
The Mean ◽  
Sectional Analysis ◽  
Toad Bufo

This study tested the hypothesis that the oxygen capacity of blood, indexed by hematocrit, affects the body temperature (Tb) selected by toads (Bufo marinus) in a thermal gradient. Anesthetized toads (Brevital sodium; 40 mg/kg im) were fitted with a cloacal thermistor and femoral artery cannula. After recovery, they were placed in a thermal gradient ranging from approximately 10 to 40 degrees C. Tb was measured for 24 h. Then 1-2 ml blood were withdrawn and replaced with an equal volume of either 0.66% saline or packed red cells from donor toads. Selected Tb was measured for the next 24 h. The mean Tb selected by B. marinus (n = 33) was 24.9 degrees C. Cross-sectional analysis showed no correlation between selected Tb and hematocrit. However, each toad rendered anemic showed a reduction of selected Tb (mean = 22.9 degrees C). The degree of Tb reduction was correlated with the hematocrit reduction, (r = 0.86; P = 0.013). Blood doping did not have a significant effect on selected Tb. The reduction of Tb could be adaptive by reducing oxygen consumption.

scholarly journals Disease phenotype analyses of relapsing-remitting multiple sclerosis in Canada and Saudi Arabia

2015 ◽  
Vol 42 (S1) ◽  
pp. S32-S32
Author(s):  
M Alluqmani ◽  
M Alqermli ◽  
G Blevins ◽  
B Alotibi ◽  
F Giuliani ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Saudi Arabia ◽  
Geographic Location ◽  
Clinical Findings ◽  
Cross Sectional ◽  
Relapsing Remitting ◽  
Similar Disease ◽  
The Mean ◽  
Sectional Analysis ◽  
Relapsing Remitting Multiple Sclerosis

Background: Multiple sclerosis (MS) exhibits a spectrum of clinical findings, especially in relapsing-remitting MS (RR-MS). To assess the effects of geographic location and ethnicity on RR-MS phenotype, we investigated RR-MS patients in Canada and Saudi Arabia. Methods: A retrospective cross-sectional analysis of patients receiving active care in MS Clinics was performed in Medina, Saudi Arabia and Edmonton, Alberta. Demographic and clinical data was collected for each patient. Results: 98 patients with treated RR-MS were recruited (n=51, Medina; n=47, Edmonton); 40 patients were Caucasian (Edmonton) while 46 patients were Bedouin (Medina). Although the disease duration was longer in the Edmonton (5.7+2.3 yr) compared to the Medina group (4.4+1.4 yr) (p<0.05), the mean age of RR-MS onset, relapse rate and EDSS change were similar. The female:male ratio was comparable in Edmonton (35:12) and Medina (32:19), as was the risk of optic neuritis. The likelihood of an infratentorial lesion-associated presentation differed (Edmonton, n=23; Medina; n=13) among groups (p<0.05). Spinal cord lesions on MRI were more frequent in Edmonton (n=18) compared to Medina (n=1) patients (p<0.05). Conclusions: Despite differences in location, ethnicity, and a predominance of infratentorial lesion burden the Edmonton group, the RR-MS phenotype displayed similar disease severity and trajectory in these cohorts.

The Initial Return and Its Conditional Return Volatility: Evidence from the Chinese IPO Market

2014 ◽  
Vol 17 (04) ◽  
pp. 1450022 ◽  
Author(s):  
M. Monica Hussein ◽  
Zhong-Guo Zhou
Keyword(s):  
Time Series ◽  
Linear Functions ◽  
Return Volatility ◽  
Cross Sectional ◽  
Variance Model ◽  
Initial Return ◽  
Traditional Market ◽  
Mean And Variance ◽  
The Mean ◽  
Sectional Analysis

This paper investigates the monthly initial return and its conditional return volatility for Chinese IPOs. We find that the mean initial return (IR) and cross-sectional return volatility are highly auto- and cross-correlated, and time-varying. We propose a system of two simultaneous equations: a GARCH-in-mean (GARCH-M) process with an ARMA(1,1) adjustment in the residuals for the IR and an EGARCH process for the conditional return volatility, assuming that the IR and its conditional return volatility are linear functions of the same market, firm- and offer-specific characteristics. We find that the model captures both time-series and cross-sectional correlations at the mean and variance levels. Our findings suggest that the conditional return volatility affects the IR positively and significantly, in addition to the traditional market, firm- and offer-specific characteristics. IPOs with higher conditional return volatility, as a proxy for information asymmetry, tend to be underpriced more. The paper demonstrates the merit of using a conditional variance model, along with time series and cross-sectional analysis to price Chinese IPOs.

scholarly journals BMD status of Postmenopausal Women in relation with BMI: A study with 93 cases

2016 ◽  
Vol 17 (2) ◽  
pp. 138-141
Author(s):  
Samira Sharmin ◽  
Mabubul Haque ◽  
Syedur Rahman Miah ◽  
Md Mahbub Ur Rahman ◽  
Jasmine Ara Haque ◽  
...  
Keyword(s):  
Lumbar Spine ◽  
Femoral Neck ◽  
Postmenopausal Women ◽  
Lumbar Vertebrae ◽  
The Body ◽  
Mineral Density ◽  
Cross Sectional ◽  
T Score ◽  
Minimal Trauma ◽  
The Mean

Objectives: Low bone mass is a common disorder in elderly population which predisposes to fracture with minimal trauma. This study was performed to find out the association between the Body Mass Index (BMI) and Bone Mineral Density (BMD) in postmenopausal women.Materials and Methods: This cross sectional study was carried out at Institute of Nuclear Medicine and Allied Sciences Comilla and Mitford, Dhaka over a period of 12 months from January 2013 to December 2013. A total 93 postmenopausal women were enrolled for this study. All postmenopausal women underwent a BMD scan of femoral neck and lumbar vertebrae using a Dual Energy X-ray Absorptiometry (DEXA). Participants were categorized into three groups according to their age and BMI. BMD were expressed base on T-score according to WHO criteria. The relation among BMI, age and BMD were assessed.Results: The results of this study showed that the mean age of the study group was 57.13±7.49 years with range of 46 to 75 years. The most postmenopausal women were in age group 55-65years. The mean BMI of the study subjects were 24.18±5.08 kg/m2 with a range of 15.62 to 36.20 kg/m2. Among 93 subjects osteopenia was greater at lumbar spine (45.2%) with T-score mean±SD-1.83±0.33 and osteoporosis at femoral neck (51.6%) with T-score mean ±SD-3.36±-0.67. Pearson’s correlation coefficient test showed inverse relationship between age and BMD both lumbar spine (r = -0.301, p = 0.003) and femoral neck (r = -0.303, p=0.003) whereas the positive relation between BMI and BMD both at lumbar spine (r=0.338, p=0.001) and femoral neck (r =0.343, p=0.001). These showed that with advancing age, BMD decreases and the risk of osteoporosis increases and with increasing BMI, BMD increases and risk of osteoporosis decreases.Conclusion: The findings of this study portrait that aging and low BMI are risk factors associated with bone loss. So preventive measure should be taken for high risk post menopausal women.Bangladesh J. Nuclear Med. 17(2): 138-141, July 2014

The Vertical Mean Force and Moment of Submerged Bodies Under Waves

1971 ◽  
Vol 15 (03) ◽  
pp. 231-245 ◽  
Author(s):  
C. M. Lee ◽  
J. N. Newman
Keyword(s):  
Free Surface ◽  
Added Mass ◽  
Cross Sectional Area ◽  
The Body ◽  
Slender Body ◽  
Longitudinal Distribution ◽  
Vertical Force ◽  
Sectional Area ◽  
Cross Sectional ◽  
The Mean

A neutrally buoyant slender body of arbitrary sectional form, submerged beneath a free surface, is free to respond to an incident plane progressive wave system. The fluid is assumed inviscid, incompressible, homogeneous and infinitely deep. The first-order oscillatory motion of the body and the second-order time-average vertical force and pitching moment acting on the body are obtained in terms of Kochin's function. By use of slender-body theory for a deeply submerged body, the final expressions for the mean force and the moment are shown to depend on the longitudinal distribution of sectional area and added mass and on the amplitude and the frequency of the ambient surface waves. The magnitude of the mean force for various simple geometric cylinders is compared with that of a circular cylinder of equal cross-sectional area. The mean force on a nonaxisymmetric body is often approximated by replacing the section with circular profiles of equivalent cross-sectional area. A better scheme of approximation is presented, based on a simple way of estimating the two-dimensional added mass. It is expected that the effect of the cross-sectional geometry on mean vertical force and moment will be more significant when the body is very close to the free surface.

scholarly journals Thyroid Function and 25 (OH) Vitamin D Level among Sudanese Women in Early Pregnancy

2018 ◽  
Vol 6 (3) ◽  
pp. 488-492
Author(s):  
Imad R. Musa ◽  
Duria A. Rayis ◽  
Mohmamed A. Ahmed ◽  
Ammar H. Khamis ◽  
Abubakr M. Nasr ◽  
...  
Keyword(s):  
Vitamin D ◽  
Thyroid Function ◽  
Early Pregnancy ◽  
Cross Sectional Study ◽  
The Body ◽  
Sectional Study ◽  
Cross Sectional ◽  
Vitamin D Levels ◽  
The Mean ◽  
25 Oh Vitamin D

AIM: A cross-sectional study was conducted at Saad Abualila Hospital (Khartoum, Sudan) to evaluate the vitamin D levels and thyroid function among pregnant Sudanese women (132) in early pregnancy.METHODS: A cross-sectional study was conducted at Saad Abualila hospital (Khartoum, Sudan) during the period from March to July 2015. Women who were in early pregnancy with a singleton pregnancy were approached to participate in the study after signing informed consent. A sample size of 132 participants was calculated guided by the normal interval of thyroid function in Sudanese women in the first trimester and not the level of 25(OH) vitamin D. The 25 - hydroxyvitamin D (25 (OH) vitamins levels were measured using an electrochemiluminescence immunoassay on an Elecsys 2010 Analyzer (Roche Diagnostics, Mannheim, Germany).RESULTS: The mean (SD) of age, gravidity and gestational age was 27.6 (5.5) years, 2.2 (1.6) and 10.4 (2.2) weeks, respectively. The mean (SD) of the body mass index (BMI) and haemoglobin was 27.1 (5.2) kg/m2 and 10.8 (1.1) g/dl, respectively. Median (interquartile) values of TSH, FT3, and FT4 were 1.164 IU/ml (0.079 -2.177 IU/ml), 4.639 nmol/l (3.843 - 6.562 nmol/l), and 16.86 pmol/l (13.02 - 31.48 pmol/l), respectively. There was no significant correlation between vitamin D levels and TSH, FT3 and FT4CONCLUSION: There is no correlation between 25 (OH) vitamin D levels and thyroid function during early pregnancy among Sudanese pregnant women, despite prevalent vitamin D deficiency among these women.

scholarly journals Association between glomerular filtration rate (measured by high-performance liquid chromatography with iohexol) and plasma oxalate

2018 ◽  
Vol 40 (1) ◽  
pp. 73-76 ◽  
Author(s):  
Luciano da Silva Selistre ◽  
Pierre Cochat ◽  
Dener lizot Rech ◽  
François Parant ◽  
Vandréa Carla de Souza ◽  
...  
Keyword(s):  
Glomerular Filtration Rate ◽  
Glomerular Filtration ◽  
High Performance ◽  
Filtration Rate ◽  
Case Series ◽  
Primary Hyperoxaluria ◽  
The Body ◽  
Cross Sectional ◽  
Sectional Analysis ◽  
Transplanted Kidneys

ABSTRACT Introduction: Secondary hyperoxalemia is a multifactorial disease that affects several organs and tissues in patients with native or transplanted kidneys. Plasma oxalate may increase during renal failure because it is cleared from the body by the kidneys. However, there is scarce evidence about the association between glomerular filtration rate and plasma oxalate, especially in the early stages of chronic kidney disease (CKD). Methods: A case series focuses on the description of variations in clinical presentation. A pilot study was conducted using a cross-sectional analysis with 72 subjects. The glomerular filtration rate (GFR) and plasma oxalate levels were measured for all patients. Results: Median (IQR) GFR was 70.50 [39.0; 91.0] mL/min/1.73 m2. Plasma oxalate was < 5.0 µmol/L in all patients with a GFR > 30 mL/min/1.73m2. Among the 14 patients with severe CKD (GFR < 30 mL/min/1.73 m2) only 4 patients showed a slightly increased plasma oxalate level (between 6 and 12 µmol/L). Conclusion: In non-primary hyperoxaluria, plasma oxalate concentration increases when GFR < 30mL/min/1.73 m2 and, in our opinion, values greater than 5 µmol/L with a GFR > 30 mL/min/1.73 m2 are suggestive of primary hyperoxaluria. Further studies are necessary to confirm plasma oxalate increase in patients with low GFR levels (< 30mL/min/1.73 m2).

Composição Corporal de Adultos Com Síndrome de Down e Excesso de Peso Atendidos em Hospital Universitário

2018 ◽  
Vol 22 (1) ◽  
pp. 47
Author(s):  
Leiliane Cruz Reis ◽  
Livia Maria Machado Nunes ◽  
Maria Edilma Da Silva Bezerra ◽  
Rosilene Reis Della Noce
Keyword(s):  
Body Composition ◽  
Down Syndrome ◽  
Overweight And Obesity ◽  
The Body ◽  
Fat Free Mass ◽  
University Hospital ◽  
Normal Range ◽  
Cross Sectional ◽  
The Mean ◽  
The City

Pessoas com Síndrome de Down podem, frequentemente, apresentar doença cardíaca congênita, hipotireoidismo, distúrbios gastrointestinais e tendência ao sobrepeso e obesidade, comprometendo gravemente a saúde. O objetivo deste trabalho foi descrever a composição corporal de adultos com Síndrome de Down - SD e excesso de peso, atendidos em um Hospital Universitário. Trata-se de um estudo transversal e descritivo realizado na cidade de Belém do Pará, no ano de 2017, onde os participantes com SD, foram avaliados para determinação da composição corporal com a utilização do aparelho de bioimpedância elétrica InBody230. Foram avaliados 13 indivíduos de ambos os sexos com idades variando entre 20 e 40 anos. A média de peso dos indivíduos do sexo masculino e feminino foi de 71,8 kg e 69,2 kg respectivamente, a média de Índice de Massa Corporal - IMC foi de 31,27 kg/m² para os homens e 34,08 kg/m² para as mulheres, classificada em obesidade. A maioria dos indivíduos apresenta Massa Muscular Esquelética - MME e Massa Livre de Gordura - MLG dentro da faixa de normalidade, porém os valores de Massa de Gordura (MG), assim como a Relação Cintura Quadril - RCQ de todos os indivíduos estão elevados. O acompanhamento individualizado da composição corporal, por meio da bioimpedância elétrica, mostrou ser um instrumento eficaz para avaliação do estado nutricional dessa população.Palavras-chave: Síndrome de Down. Composição Corporal. Bioimpedância Elétrica.AbstractPeople with Down Syndrome can often have congenital heart disease, hypothyroidism, gastrointestinal disorders, and tendency to overweight and obesity severely compromising health. The objective of this study was to describe the body composition in adults with Down Syndrome and overweight treated in a University Hospital. This is a cross-sectional and descriptive study carried out in the city of Belém do Pará in 2017, where the participants with DS, were evaluated to determine the body composition with the use of InBody 230 electric bioimpedance device. Eight individuals of both sexes with ages varying between 20 and 40 years were evaluated. The mean weight of the male and female subjects was 71.8 kg and 69.2 kg respectively, the mean Body Mass Index (BMI) was 31.27 kg / m² for men and 34.08 kg / m² for women, classified as obesity. The majority of individuals had a Skeletal Muscle Mass (MME) and Fat Free Mass (MLG) within the normal range, but the values of Mass of Fat (MG), as well as the Hip Waist Ratio (WHR) of all individuals are high. The individualized monitoring of body composition through electric bioimpedance proved to be an effective tool for assessing the nutritional status of this population.Keywords: Down Syndrome. Body composition. Electric impedance.

scholarly journals Brazilian Women's Health after 65 Years of Age

2017 ◽  
Vol 39 (11) ◽  
pp. 608-613 ◽  
Author(s):  
Angela Fonseca ◽  
Vicente Bagnoli ◽  
Josefina Massabki ◽  
Wilson Arie ◽  
Raymundo Azevedo ◽  
...  
Keyword(s):  
Sexual Intercourse ◽  
Clinical Symptoms ◽  
Hot Flashes ◽  
Clinic Visit ◽  
The Body ◽  
Vasomotor Symptoms ◽  
Natural Menopause ◽  
Cross Sectional ◽  
Chi Squared ◽  
Sectional Analysis

Purpose The aim of this study was to evaluate the health aspects of Brazilian women older than 65 years of age. Design This was a retrospective study that included 1,001 Brazilian women cared for in the gynecological geriatric outpatient office of our institution. We report a cross-sectional analysis of female adults aged over 65 years, including data on demographics, clinical symptoms such as vasomotor symptoms, associated morbidities, physical examination and sexual intercourse. We used the chi-squared test to assess the data. Results The age of the patients on their first clinic visit ranged from 65 to 98 years, with a mean age of 68.56 ± 4.47 years; their mean age at the time of natural menopause was 48.76 ± 5.07 years. The most frequent clinical symptoms reported during the analyzed period were hot flashes (n = 188), followed by arthropathy, asthenia, and dry vagina. The most frequent associated morbidities after 65 years of age were systemic arterial hypertension, gastrointestinal disturbance, diabetes mellitus, and depression, among others. The assessment of the body mass index (BMI) found decreases in BMI with increased age. At the time of the visit, 78 patients reported sexual intercourse. The majority of women reporting sexual intercourse (89.75%, n =  70) were between 65 and 69 years of age, 8.97% (n = 7) were between 70 and 74 years of age, and only 1.28% (n = 1) of those were aged older than 75 years. Conclusions Our findings suggested that vasomotor symptoms can persist after 65 years of age. There was a significant decrease in sexual intercourse with increased age. The cardiovascular disturbances in our study are health concerns in these women.

scholarly journals Avaliação dos Níveis de Atividade Física em Estudantes Universitários do Ensino a Distância

2017 ◽  
Vol 19 (3) ◽  
pp. 143
Author(s):  
Stefany Hulda Primo ◽  
Mario Molari ◽  
Amanda Alcântara Luna ◽  
Nuno de Noronha Da Costa Bispo ◽  
Vinicius Aparecido Yoshio Ossada ◽  
...  
Keyword(s):  
Physical Activity ◽  
Morbid Obesity ◽  
Health Promotion ◽  
University Students ◽  
Physical Inactivity ◽  
Cross Sectional Study ◽  
Normal Weight ◽  
The Body ◽  
Cross Sectional ◽  
The Mean

Atualmente tem se observado que as incidências de mortes são ocasionadas por fatores relacionados ao comportamento humano, como no caso da inatividade física. Esta pesquisa se objetivou em avaliar o nível de atividade física habitual - AF em relação ao índice de massa corpórea - IMC em universitários do Ensino a distância - EaD, por meio do Questionário Internacional de Atividade Física - IPAQ. É um estudo do tipo transversal com o total de 107 universitários do EaD. Para as coletas de dados foi utilizado o questionário geral e o questionário IPAQ. O IMC foi calculado pela equação IMC= peso corporal (Kg)/ altura (m)2, considerando os valores <18,5 kg abaixo do peso; e entre 18,5-24,9 kg peso normal; 25-29,9 kg sobrepeso; 30-34,9 kg obesidade leve; 35-39,9 kg obesidade moderada e obesidade mórbida >40 kg (CUNHA, 2009). A média de idade foi de 30,1±9,7 anos, prevalecendo o sexo feminino com 61,6%. Dos 107 entrevistados, 64,4% são praticantes de AF. Quanto ao IMC, 6,5% estão abaixo do peso; 46% estão no peso normal; 33% estão com sobrepeso; 9,3% estão com obesidade leve; 2% com obesidade moderada; 3,8% com obesidade mórbida, sendo 1,8%. Através dos dados analisados por meio do questionário GERAL, IPAQ e pelo programa de análise estatística SPSS se verificou que quanto maior o IMC, pior é a classificação quanto ao nível de atividade física. Sendo assim, nota-se a importância de ações voltadas para os universitários praticarem atividade física, além de estratégicas voltadas para a promoção da saúde e prevenção de doenças provenientes do sedentarismo.Palavras-chave: Exercício. Obesidade. Promoção da Saúde.AbstractIt has now been observed that the incidence of deaths is caused by factors related to human behavior, as in the case of physical inactivity. This study aimed to evaluate the level of habitual physical activity (FA) in relation to the body mass index (BMI) in distance learning university students (EAD), through the International Questionnaire of Physical Activity (IPAQ). It is a cross-sectional study with a total of 107 university students. For data collection, the general questionnaire and the IPAQ questionnaire were used. The BMI was calculated by the equation BMI = body weight (kg) / height (m) 2, considering values <18.5 kg below weight; And between 18.5-24.9 kg normal weight; 25-29.9 kg overweight; 30-34.9 kg light obesity; 35-39.9 kg moderate obesity and morbid obesity> 40 kg (CUNHA, 2009). The mean age was 30.1 ± 9.7 years, prevailing the female sex with 61.6%. Of the 107 interviewees, 64.4% are AF practitioners. Regarding BMI 6.5% are underweight; 46% are in normal weight; 33% are overweight; 9.3% are lightly obese; 2% with moderate obesity; 3.8% with morbid obesity, being 1.8%. Through the data analyzed through the questionnaire GENERAL, IPAQ and the program of statistical analysis SPSS, it was verified that the higher the BMI, the worse the classification concerning the level of physical activity. Thus, we notice the importance of actions aimed at university students to practice physical activity, as well as strategies aimed at health promotion and prevention of sedentrary individuals’ diseases.Keywords: Exercise. Obesity. Health Promotion.

scholarly journals Korelasi persentase lemak tubuh dengan kadar adipsin pada premenopause

2018 ◽  
Vol 14 (3) ◽  
pp. 99
Author(s):  
Rahmani Welan ◽  
Gusti Revilla ◽  
Desmawati Desmawati
Keyword(s):  
Body Fat ◽  
Venous Blood ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
The Body ◽  
Enzyme Linked Immunosorbent Assay ◽  
Body Fat Percentage ◽  
Fat Percentage ◽  
Cross Sectional ◽  
The Mean

Background: One of the conditions on premenopausal period is the increase in body fat, among which are caused by levels of the fluctuating estrogen hormone. Increase fat affects the body fat percentage and adipsin levels. Adipsin plays a role in the stimulation of insulin secretion by producing C3a, in which C3AR1 (C3a Receptor 1) fragments interact with beta cells to secrete insulin.Objective: The purpose of this study is to determine correlation of body fat percentage with adipsin levels on premenopause.Design: This was an analytical study with cross-sectional design. Body fat percentage was obtained by examination using Bioelectrical Impedance Analysis (BIA). Venous blood was taken at the mediana cubiti area used for serum adipsin levels. Adipsin levels were analyzed by Enzyme-linked Immunosorbent Assay (ELISA) technique.Results: The mean of body fat percentage on premenopausal was 36,18 ± 8,35%. The mean of adipsin levels on premenopausal was 117,05 ± 87,93 ng/ml. Result of Pearson test analysis got value r = 0,632 and value p = 0.0005 (p <0,05).Conclusions: There is a positive significant correlation between the percentage of body fat with adipsin levels on premenopause.

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