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 82 for “"nutrient supply"”.
-
Shear enhanced nutrient supply at the Mesoscale
… to sunlight, phytoplankton require a regular supply of nutrients to grow. In the open ocean such nutrients are abundant in the dark waters below the euphotic zone. Hence, to a large extent it is the physical mechanisms driving the transfer of nutrient rich water into the euphotic zone which …
-
Influence of dietary fat and protein on nutrient supply and utilization by the lactating bovine mammary gland
… daily milk output and composition by influencing nutrient supply to the mammary gland. Three lactating Holstein cows (60, 68, and 74 d postpartum) were used in an incomplete 4 x 4 Latin square design (2 x 2 factorial) and fed diets (15.9% CP and 19.5% ADF) with 0% or 2.5% partially hydrogenated …
-
Effect of Forage Stand Termination Method and Fertilization History on Greenhouse Gas Emissions, Nutrient Supply Rates, and Soil Carbon Dynamics
… production, as well as affect carbon (C) and nutrient cycling in the soil. The objective of this thesis work was to examine the influence of grass forage stand termination method on GHG production, nutrient cycling, and dynamics of various soil C pools. Additionally, the influence of two …
-
Nitrogen cycling in the South Atlantic and South Indian Oceans investigated using nitrate isotopes: implications for nutrient supply, ocean fertility, carbon export, and climate
… Indian Oceans are presented alongside coincident nutrient and hydrographic data, and other published nitrate isotope datasets. Combined, these data provide a means of quantifying the rate and distribution of N2 fixation, along with characterizing additional co-occurring N cycle processes, …
-
PHYSIOCHEMICAL AND NUTRIENT PROPERTIES AND TRUE NUTRIENT SUPPLY OF WHOLE OAT GRAINS IN RUMINANT SYSTEMS: EFFECT OF OAT VARIETIES AND TYPES (FEED TYPE VS. MILLING TYPE)
… type vs. milling type) on the physiological and nutrient properties and true nutrient supply in ruminant system as an alternative feed source for ruminants. This project was carried out in three major phases. In the first phase, results showed that CDC Nasser had highest EE, NPN and lowest ADL …
-
Blocking Immunosuppressive Factors and Taking Advantage of the Nutrient Supply Within the Tumor Microenvironment: Pathways to Achieve Improved Cancer Immunotherapeutic Efficacy for Patients With Metastatic Melanoma
… exhaustion. Finally, the TME commonly lacks nutrients and oxygen needed for the CD8+TILs’ energy production. My data demonstrate that these metabolic challenges profoundly contribute to the CD8+TILs' functional impairment. Using 13C-stable isotope tracing in vivo, I show that metabolically …
-
The impact of mouse placental endocrine function on fetal resource allocation and adult offspring health
… and fetal outcomes are determined by adequate nutrient partitioning between the mother and fetus. In turn, the placenta plays a critical role in nutrient partitioning during pregnancy, as it is responsible for secreting hormones that induce maternal insulin resistance and transports the …
-
Nutrient Uptake Estimates for Woody Species as Described by the NST 3.0, SSAND, and PCATS Mechanistic Nutrient Uptake Models
… the advent of the personal computer, mechanistic nutrient uptake models have become widely used as research and teaching tools in plant and soil science. Three models NST 3.0, SSAND, and PCATS have evolved to represent the current state of the art. There are two major categories of mechanistic …
-
Improving the Efficiency of Dairy Cattle Feeding
… that use amino acids (AA) are limited by AA supply. This concept was likened to staves in a barrel, where the shortest stave determines the barrel's ability to hold water (Mitchell and Block, 1946). Inaccuracies in models that predict nutrient supply and requirements of dairy cows result in …
-
Maximizing yield of high quality cottonseed through nutrient management strategies
… Following the availability of an adequate water supply, growing season length and nutrient supply become the next major limiting factors to cotton production on the Texas High Plains. The prevailing temperatures provide marginal heat unit accumulation during the early and latter parts of the …
-
Studies on the fed-batch propagation of brewer's yeast in high gravity wort
… and the yeast biomass formation by controlling nutrient supply.
-
Variation in chemical components of aquacultured Ulva (Chlorophyta) in response to environmental variables
… 5, 10, 20, 25 and 35 ‰ (all ± 0.1 ‰) and nutrient treatments: 100 % Provasoli ES medium (high nutrient supply) and 0 % Provasoli ES medium (low nutrient supply) at 10 °C and 15 °C for 6 days under constant light (39.2 ± 0.43 μmol photons m⁻² s⁻¹) on a 16:8 hours light:dark photoperiod. …
-
Physical influences on phytoplankton ecology : models and observations
… populations intermingled, but also mediates the supply of nutrients to the surface mixed layer. In this thesis I explore both of these aspects of the interaction between phytoplankton ecology and ocean physics, and have approached this topic in two distinct but complementary ways, working with a …
-
Physical influences on phytoplankton ecology : models and observations
… populations intermingled, but also mediates the supply of nutrients to the surface mixed layer. In this thesis I explore both of these aspects of the interaction between phytoplankton ecology and ocean physics, and have approached this topic in two distinct but complementary ways, working with a …
-
Some nonlinear problems in plankton ecology
… a phytoplankton population and a limiting nutrient resource. Most models for this interaction consider all cells as equal and group them under a single variable, the total biomass or cell density. They do not take into account any population heterogeneity resulting from the life histories …
-
Nutritional constraints to lamb growth at pasture
Intake and nutrient supply were measured in early weaned lambs grazing pure species swards of Rere lucerne (Medicago sativa, L), Huia white clover (Trifolium repens, C), Ruanui perennial ryegrass (Lolium perenne, R) and Matua prairie grass (Bromus catharticus, P). A study of the factors regulating …
-
Ecological aspects of the substrate and water relations of deciduous and evergreen plant forms in the western Karoo
… ascertain the relative importance of water and nutrient supply in determining the success of deciduous and evergreen plant forms on two main substrate types in the Worcester-Robertson valley, situated in the Succulent Karoo Biome. The substrate types selected for study represent soils of …
-
Nitrogen uptake and phytoplankton productivity in the changing Barents Sea
… in ocean mixing are affecting nutrient supply, uptake and cycling and will<br/>have large-scale consequences for the distribution and magnitude of primary production<br/>throughout the Arctic Ocean. The objective of this study is to quantify nitrogen<br/>uptake and phytoplankton …
-
Three-Dimensional Microelectrode Array for Recording Dissociated Neuronal Cultures
… layers provide an artificial vasculature for nutrient supply and aeration, as well as permit the loading of dissociated neurons into the structure. The fluidic layers also serve as insulation for the microelectrodes. Cells have been shown to survive in the 3D MEA for up to 28 days, with …
-
Application of Computational Fluid Dynamics as a Simulation-based Design Guide in a Microfluidic 3D Living Cell Array (3D LCA) Device
… as pore size) can have drastic effects on the nutrient supply and waste removal mechanics of the 3D cell microchamber, while other factors such as the permeability of the medium of cell culture (hydrogel) does not affect the glucose concentration but does affect the O2 and CO2 concentrations …
Page 1 of 5