Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 164 for “"Biological Factors"”.
-
Physical and biological factors structuring sandy beaches macrofauna communities
… Furthermore, little proof has been obtained of biological interactions such as competition or predation, and beaches have been described as physically controlled environments. The aim of this investigation was therefore to redifine the SEH in more specific terms, preferably into a form that is …
-
Biological factors influencing the nature of goat skins and leather
The effect of a goat’s sex, age, slaughter weight and nutrition on its skin and leather quality were investigated through chemical, biochemical, histological and hydrothermal analyses of dried skins, and physical testing of leathers. This work formed part of a larger project sponsored by the …
-
Biological factors involved in the absenteeism of children from Stockton public schools
<p>Every state has a compulsory school attendance law, and yet at any time during the school year approximately 12 percent of the children will not be in school - cannot very well be in school, because of some physical, mental, or emotional handicap, either temporary or permanent.</p><p>These …
-
Physical and biological factors affecting oxygen transfer in the activated sludge wastewater treatment process
… This study is focused on determining different factors that influence oxygen transfer and consequently its energy demand.</p><p>AS morphology, as described by the d<sub>10</sub>, d<sub>20</sub>, d<sub>32</sub>, specific filament length (SFL), 30 min settleability (SV<sub>30</sub>), etc., does …
-
Chemical and biological factors affecting the performance of CCA and ACA treated wood in soil
The performance of CCA and ACA treated wood in soil contact has been investigated with particular reference to the effect of high concentrations of nitrogen on the decay process, fixation and leachability of preservative elements and the role of lignin in the binding of nitrogen and preservative …
-
Chemical, Physical, and Biological Factors Influencing Nutrient Availability and Plant Growth in a Pine Tree Substrate
… The objective of this work was to determine the factors influencing nutrient availability in PTS compared to PB or peat substrates. Chapter two reports data on the response of japanese holly and azalea to fertilizer rate when grown in PTS and PB. This study demonstrated that an additional 2.4 …
-
CLINICAL AND BIOLOGICAL FACTORS OF MATERNAL DEPRESSION IN PREGNANCY AND RISK OF AN ALTERED NEURODEVELOPMENT IN THE OFFSPRING: CLINICAL AND PRECLINICAL DATA
Le donne hanno un rischio maggiore di sviluppare malattie psichiatriche, e in particolare depressione, durante la gravidanza e nel postpartum, per via di molteplici fattori psicosociali, economici, e legati allo stile di vita, che caratterizzano questo periodo e che possono modificare la loro …
-
Riparian willow dynamics and their interaction with environmental and biological factors in the elk winter range of Rocky Mountain National Park (Colorado) - a multi-scale analysis
… and their association with different causative factors were evaluated in two valleys of the elk winter range of Rocky Mountain National Park (Colorado). Studies at the individual, population, and landscape scale were conducted, and results from these studies were incorporated into a spatial, …
-
Factors affecting the infauna associated with mussel beds
… to determine the effects certain physical and biological factors (tidal height, wave exposure, biogeography, mussel species and mussel size) have on the community composition of the infauna associated with mussel beds along the coast southern Africa.
-
The structure and functioning of the fish assemblage of the Humber Estuary, UK
… of the assemblage and the environmental and biological factors influencing the fish distribution.
-
Context-dependent controls of periphyton across the littoral-benthic habitat of deep, clear lakes
… habitat of lakes may be affected by biological factors (density of high-level predators) than by surrounding substrate types, although these differences may have arisen from other, non-biological factors (e.g., nutrient supply from groundwater or surface runoff). Our findings reveal …
-
Biomechanical And Biological Evaluation Of A Model Of Post-Traumatic Osteoarthritis Following Noninvasive, Traumatic Rupture Of The Anterior Cruciate Ligament
… employed model, but it may introduce confounding biological factors due to surgery. The purpose of this dissertation was to utilize the tibial compression model of ACL injury to induce a noninvasive ACL rupture in the rat. First, a biomechanical characterization of four different loading protocols …
-
Behavior-genetic analyses in Japanese quail chicks
… here involved an analysis of some of the biological factors affecting tonic immobility in young Japanese quail. Both duration and incidence of tonic immobility were measured on each bird at six days and again at 12 days of age. A significant line effect was found at both ages, and rankings …
-
Evaluating the Accuracy of Childhood Mental Health Diagnosis in a Clinical Setting
… diagnosed more frequently with ADHD because of biological factors or social norms. Many researchers suggest that females are under diagnosed and exhibit internalizing symptoms of ADHD, and thus are diagnosed differently. The study is an archival study from 2009 and would be based on observations …
-
Survival of breast cancer patients and the potential for better prognostication
Many factors influence the survival of patients with breast cancer. Tumour biology is likely the most important; secondly, the treatment options and the response to the treatment. Individuals with the same stage and similar pathological diagnoses can experience different clinical courses. Patient …
-
Détermination des teneurs en radium-226 par spectrométrie de masse dans la chair et la coquille de l'huître américaine (crassostrea virginica) du Nouveau-Brunswick, Canada
… a biosentinel for radium? Discriminating biological factors from environmental ones regarding radium levels in oysters soft tissues and shells."--Résumé
-
Microplastics in White Sucker (Catostomus commersonii) and Common Carp (Cyprinus carpio) from the Upper Thames River, Ontario.
… results provide insight into environmental and biological factors that may be influencing the variation of microplastic ingestion in demersal river fishes.
-
Factors influencing brook trout (Salvelinus fontinalis ) abundance in forested headwater streams with emphasis on fine sediment
… trout abundance relative to other physical and biological factors. Adult trout abundance was principally a function of stream discharge, and is potentially further influenced by fine sediment impacts on juvenile recruitment. Spatially restricted food resources, created by drought-induced low …
-
Elucidating sexual and reproductive health knowledge and interpersonal correlates and predictors of contraceptive use behaviors among young adults 18-24
… and indirect associations between sociocultural factors, interpersonal factors, biological factors, and dual use. Methods: Young adult college students ages 18-24 (N=4,196) were invited to complete a web-based, cross-sectional, sexual health survey in Fall 2018. Multivariable linear and logistic …
-
Characteristics of cone-forming cyanobacteria and implications for the origin of conical stromatolites
… Our investigation aims to understand the biological factors in the formation of conical structures and stromatolites. To elucidate the role of the cyanobacteria, we enrich cyanobacteria from modern hot-spring communities of cone-forming microbes and subsequently test how the formation of …
Page 1 of 9