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.
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Showing 1 to 20 of 25 for “"sulfur (S)"”.
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Effects of Ammoniation, Ensiling and Sulfur Fertilization on Phenolic Composition of Gramineous Cell Walls and Their Digestion by Ruminants (Fescue)
… effects of alkali chemicals, ensiling and sulfur (S) fertilization on phenolic composition of grass cell walls and on nutrient digestion by cattle.
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SYNTHESIS, CHARACTERIZATION OF 3D GRAPHENE-BASED MACROASSEMBLIES AND THEIR ENVIRONMENTAL REMEDIATION APPLICATIONS
… with heteroatoms (nitrogen (N), boron (B) and sulfur (S)) in different amounts and different molecular configurations; (ii) evaluation of the photocatalytic performance of as-synthesized photocatalysts using a model recalcitrant organic contaminant under visible light irradiation. Additionally, …
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Effect of aluminum oxyhydroxide coatings on the performance of limestone drains
… solutions were analyzed for Al, calcium (Ca) and sulfur (S) using inductively coupled plasma optical emission spectroscopy (ICP OES). Examination of the precipitated coatings using x-ray diffraction indicated that amorphous poorly crystalline gibbsite is the primary Al coating but scanning …
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Effect of sulfur fertilization on yield and chemical composition of corn forage and utilization of corn silage by sheep
Sulfur (S) deficiencies have become an increasing problem in the United States. A field experiment, in a latin square design, was conducted to investigate effects of S fertilization as 0 and 67 kg/ha as a single or split application on corn (Zea mays L.) forage yield and chemical composition. …
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Investigating Nutrient Management Innovations in Upland Cotton Production to Increase Agronomic Efficiency
… the effects of side-dress potassium (K), sulfur (S), and boron (B) formulation and application timing on tissue nutrient levels during the bloom period; 2) evaluate lint yield response of cotton to different formulations of nitrogen (N), K, S and B applied at side-dress; and 3) compare 5x5 …
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Modeling of Kraft Mill Chemical Balance
… can have a significant impact on sodium (Na) and sulfur (S) balances in the kraft pulping process. In order to maintain a proper balance of Na and S, kraft mills may need to adopt different makeup strategies. For this purpose, a dynamic model was developed to predict the Na and S balance in the …
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Comparative Analysis and Speciation of Sulfur K, L-edge X-ray Absorption Spectroscopy
Sulfur plays a critical role in the evolution of many common biological aspects of life as a key component of protein and enzyme function. It also plays a significant role in the contemporary demand for energy resources in modern society, with associated industrial and commercial applications. …
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The Design and Synthesis of β-Keto Vinyl Sultams and Macrocyclic β-Keto Vinyl Sultams: Novel Analogs of Tetramic Acids
Sulfur (S)-containing heterocyclic compounds possessing R1R2N–SO2R3 functionality have been recognized as important due to their innate physical properties that affect biological systems marking them as attractive targets for probing biological pathways. Specifically, sulfonamides and sultams …
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Innovative foliar micronutrient sources in high-yielding corn environments
… compared to the uptake of phosphorus (P), sulfur (S), and zinc (Zn), which primarily occurs during grain-filling. Increased planting densities and hybrid selection create a high-yield potential in today's modern corn production systems, necessitating greater nutrient supply or efficiency. …
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Rhizosphere Bacteria and Phytostabilization Success: The Association Between Bacteria, Plant Establishment and Metal(loid) Immobilization in Metalliferous Mine Tailings
… erosion, an emergence of an iron (Fe)- and sulfur (S)-oxidizer and Fe-reducer dominated, less diverse community develops in the bulk and rhizosphere substrate, thus posing a threat to successful plant establishment. However, even at low pH, some plant-growth-promoting bacteria are still …
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Evaluating diagnostic tools for phosphorus and sulfur management in corn
… essential nutrients, such as phosphorus (P) and sulfur (S), is critical for maximizing corn productivity. This study aimed at enhancing corn production by evaluating diagnostic tools for nutrient management and optimizing fertilization practices, focusing on P and S nutrients. Studies were …
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Spatial Variability Analysis and Reclamation of Saline-Sodic Soils in the Northern Great Plains
… amendments [gypsum, calcium chloride, elemental sulfur (S), and no amendments]. A mixture of barley (Horedeum vulgare) and sugar beet (Beta vulgaris) was used as the cover crop. At 169 sampling points, yield, soil properties, and reflectance were measured. Spatial class was developed using nugget …
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Experimental, geochemical and isotopic insights on melting and degassing behavior on Earth
… to study the solubility and speciation of sulfur (S) in hydrous, oxidized primitive magmas as can be found in subduction zones. High pressure experiments demonstrate the coupled behavior of H2O and S, which mutually interact to fix redox conditions. Exsolution of S-rich fluids is found to …
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Nitrogen and Sulfur Management in Soybean and Edamame Production in the Mid-Atlantic Coastal Plain
… needs to be continually monitored and improved. Sulfur (S) deficiencies in soybean have become more frequent in the U.S. due to fertilizer purity, emissions regulations, and higher yields. We completed a study for soybean grown in sandy loam soils in the mid-Atlantic coastal plain system to …
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Sulfur Implanted GaSb for Non-Epitaxial Photovoltaic Devices
… and p-type substrates. This work identifies sulfur (S+) as another species to investigate for this purpose. To do so, material and electrical characterization was done on S+ and beryllium implanted GaSb films grown onto a semi-insulating gallium arsenide (GaAs) substrate. X-ray Diffraction …
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Nitrogen and sulfur effects on hard winter wheat quality and asparagine concentration and survey of Kansas soil sulfur conditions
Soil sulfur (S) deficiency is becoming increasingly common throughout the U.S. due to The Clean Air Act of 1990; S deficiency is typically found in high sand and low organic matter soils and looks very similar to nitrogen deficiency with stunted growth and chlorosis. Over application of N when …
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The effect of active mass thickness on the cycle life of low-antimony lead-alloy spine employed in deep-cycle batteries
… to investigate the elemental distribution of sulfur (S present as sulfate) in the corrosion layer interface have provided no evidence of rich layer of lead sulfate formation in the corrosion layer. The results from the residual cross-sectional areas indicated that corrosion failure result from …
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Strategies to improve crop recovery of swine manure nitrogen
… and 2) using supplemental phosphorus (P) and sulfur (S) fertilizers as means of enhancing crop recovery of LSM-N.Field experiments were conducted at two long-term manure management sites in Saskatchewan; 1) Dixon (Black Chernozem) and 2) Melfort (Dark Grey Luvisol). At the Dixon site, plant …
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Comprehensive metabolite analysis in Chlamydomonas reinhardtii : method development and application to the study of environmental and genetic perturbations
… Cells subjected to nitrogen (N), phosphorus (P), sulfur (S) or iron (Fe) depleted growth conditions develop highly distinctive metabolite profiles with metabolites implicated in many different processes being affected in their concentration during adaptation to nutrient deprivation. Metabolite …
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Soil-plant dynamics of water, nitrogen and sulfur: A study on indigenous and exotic tree species in Munessa Forest, Ethiopia
… dynamics, focussing on water, nitrogen (N) and sulfur (S), which included the development of a stable-isotope methodology for S. Based on a characterization of the soils of the study area at the Main Ethiopian Rift Valley escarpment, experimental plots were set up in neighbouring stands of a …
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