Several studies have reported an age-related decline of physical activity (PA). We examined the impact of 4 important transitional periods-adolescence, the beginning of postsecondary education, entry into the labor market, and parenthood-on the PA of participants in the Trois-Rivières quasi-experimental study. In 2008, 44 women and 42 men aged 44.0 ...

As only females contribute directly to population growth, sexual females investing equally in sons and daughters experience a two-fold cost relative to asexuals producing only daughters. Typically, researchers have focused on benefits of sex that can counter this 'cost of males' and thus explain its predominance. Here, we instead ask ...

Objectives.The present study is an attempt to experimentally induce a younger subjective age among older adults and to test whether they show better physical functioning when they are induced to feel younger.Method.Participants were 49 older adults aged between 52 and 91 years. Following an initial measure of handgrip performance as ...

OBJECTIVE: To investigate the effect of Chan-meditation on electrocardiogram (ECG) regulated by various respiratory rhythms. METHODS: ECG complexes were firstly transformed into continuous wavelet transform (CWT) coefficient map. Three schemes were employed in the interpretation of CWT map: the moment-invariants analysis, the correlation-coefficient analysis of eigenvector derived by singular value ...

A facile one-step method was proposed for the successful synthesis of Ag-nanoparticle-loaded mesoporous silica SBA-15 composites, where silver ions and their corresponding reductant aniline were added in the traditional synthetic system of mesoporous silica SBA-15 containing P123 as the surfactant and TEOS as the silica source. Mesoporous silica SBA-15 and ...

In this study we demonstrated growth curves and reference values for hematological and serum biochemical parameters of Microminipigs, the world smallest experimental minipigs. In both male and female animals, the body weights (BWs) at 3 and 6 months of age were <5 kg and <10 kg, respectively, and growth curve ...

Bucks rendered sexually active by a photoperiod treatment of long days can induce fertile ovulation in a group of goats with only 4h of contact daily with a male:female ratio of 1:10. Here we tested whether such bucks could induce fertile ovulations when stimulating successively three different groups of anovulatory ...

Abstract Objective. The objective of the study was to investigate whether moderate-to-severe attrition is associated with maximum bite force in the first molar region. Methodology. Maximum bite force in the first molar region was measured for a total of 60 subjects having moderate-to-severe attrition of occlusal surface (experimental group) using ...

Each one of us is a self-organizing mass of multiple cell types. From fertilization of the embryo our tissue structures develop until an adult morphology is achieved. At that point our capacity for self-organization is directed to maintaining that morphology in the face of the insults of our daily life ...

Although functional explanations for female engagement in extra-pair copulation have been studied extensively in birds, little is known about how extra-pair paternity is linked to other fundamental aspects of avian reproduction. However, recent studies indicate that the occurrence of extra-pair offspring may generally decline with laying order, possibly because stimulation ...

A large body of evidence suggests that action execution and action observation share a common representational domain. To date, little is known about age-related changes in these action representations that are assumed to support various abilities such as the prediction of observed actions. The purpose of the present study was ...

Impairment of angiogenesis - new capillary blood vessel formation from pre-existing vessels, is frequent in aging tissues and cells. Reduced angiogenesis in aging individuals is associated with increased incidence of myocardial infarctions and other cardiovascular diseases. Therefore there is a need to develop novel strategies to enhance angiogenesis in aging ...

Objective: To determine adenosine deaminase activity in overweight and obese Indian subjects. Methods: This study comprised of 100 subjects. The body mass index (BMI) of subjects was calculated and adenosine deaminase activity was determined in their fasting blood sample. The study was divided into three groups depending upon BMI: Control ...

The effects of obesity on the balance and gait parameters like step width and foot angle (degree of toe out) in young adults were studied. 60 subjects of both the genders were taken. 30 were taken as a control group (non-obese, BMI < 25) and 30 were taken as experimental ...

Difficulty monitoring and inhibiting impulsive behaviors has been reported in marijuana (MJ) smokers; neuroimaging studies, which examined frontal systems in chronic MJ smokers, have reported alterations during inhibitory tasks. Diffusion tensor imaging (DTI) provides a quantitative estimate of white matter integrity at the microstructural level. We applied DTI, clinical ratings, ...

Perceived barriers were the single most powerful predictors of a change in health behaviours and the most consistent negative correlate of children's actual physical activity (PA). The purpose of this study was to compare the perceived barriers of physical activity in 714 adolescent girls defined by physical activity levels. The ...

Having a parent affected with late-onset Alzheimer's disease (LOAD) is a major risk factor for developing the disease among cognitively normal (NL) individuals. This magnetic resonance imaging (MRI) study examines whether NL with a LOAD-affected parent show preclinical brain atrophy, and whether there are parent-of-origin effects. Voxel-based morphometry (VBM) on ...

The objective of our study was to examine sociodemographic and behavioral variables underlying the geographic variation of obesity in Canada. We aimed to quantify the share of regional variation in average BMI attributable to commonly cited determinants of obesity and the remaining share, which is attributable to the idiosyncrasies of ...

The aims of this study were to examine abnormalities in brain structure in adolescents and young adults with very low birth weight (VLBW, <1,500 g) and associations of these abnormalities with neuropsychological outcomes. The sample of 108 participants from 14 to 19 years of age included 37 participants with <750 ...

The brain reserve hypothesis has been posited as being one important mediating factor for developing dementia, especially Alzheimer's disease (AD). Evidence for this hypothesis is mixed though different methodologies have made these findings difficult to interpret. We examined imaging data from a large cohort (N=194) of mixed dementia patients and ...

PURPOSE: Although the brain has been extensively studied, relationships of gray (GM) to white (WM) matters in individual sections as typically acquired and read radiologically have not yet been examined. A novel GM/WM-based approach with a compact whole brain representation is introduced and applied to study the brain and perform ...

To identify cognitively normal individuals at risk of Alzheimer disease (AD) based on cerebrospinal fluid (CSF) Aβ1-42, and to determine rates of cerebral atrophy. Control subjects from the Alzheimer's Disease Neuroimaging Initiative with CSF and serial magnetic resonance imaging (MRI) were dichotomized on CSF Aβ1-42 (normal control [NC]-high > 192 ...

Insurers will want to use biomarkers of aging to decide whom to insure and how much to charge. If insurers are allowed to use biomarker information, then people whose biomarkers indicate shorter or more afflicted lives will find insurance harder to get and more expensive, while the longer-lived and less ...

The aim of this chapter is to review the biology and fishery, including the management, of European hake in the north-east Atlantic. The European hake is widely distributed throughout the north-east Atlantic, from Norway in the north to the Guinea Gulf in the south, and throughout the Mediterranean and Black ...

Adaptive responses which occur under changing environment enable a species existence during long periods of time. This study aimed at investigating the relationship between body mass index (BMI and characteristic of brain in newborns. This study was undertaken on 1800 healthy live born singletons (822 males and 978 females) routinely ...

Single-stranded oligonucleotides stabilize highly fluorescent Ag nanoclusters, with emission colors tunable via DNA sequence. We utilized DNA microarrays to optimize these scaffold sequences for creating nearly spectrally pure Ag nanocluster fluorophores that are highly photostable and exhibit great buffer stability. Five different nanocluster emitters have been created with tunable emission ...

In vitro gas production kinetics of six different substrates, pectin (PEC), xylan (XYL), starch (STA), cellulose (CEL), commercial compound feed (FEED; 201 g crude protein per kg, 155 g crude fibre per kg, 334 g neutral-detergent fibre (NDF) per kg and 190 g acid-detergent fibre (ADF) per kg) and an NDF prepared from commercial ...

Young, middle-aged, and older adults in orthopaedic outpatient rehabilitation (N = 373) were randomly assigned to either an interviewer-assisted or a standard-care self-administered planning intervention. Physical activity planning consisted of specifying action plans to facilitate action initiation, and coping plans to overcome barriers. The interviewer-assisted condition led to more complete action plans ...

This paper is offered as an addition to the small existing body of research on the history of old age in Australia. It considers the experiences of a cohort of early settlers in a Victorian country district as they grew old in their community. It finds that while the experience ...

The Australasian and Ivory Coast deep-sea microtektites have fission track ages of 0.71 and 1.09 million years, respectively. These ages are in good agreement with the ages of deposition of the microtektites determined from paleomagnetic data. Both the fission track ages and ages of deposition of the microtektites agree with ...

Thesis (Master, Biology) -- Queen's University, 2009-01-29 12:15:32.137

Special censuses conducted by the Bureau of the Census at the request and expense of local governments provide current statistics for many large cities which are compared with corresponding data from the1960 Census. An analysis was made of the changes in the racial composition of the cities, and of the ...