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Showing 1 to 20 of 40 for “"Phosphorus content"”.
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Tempered martensite embrittlement in 4340 steel as related to phosphorus content and carbide morphology
Includes bibliographical references (pages 120-124).
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The effect of liquid and dry fertilizers on the phosphorus content at early stages of growth and on the yield of several crops
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Soil Science, 1956
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Exploring the possibility of low temperature glazing in faience from the Djoser Step Pyramid through compositional analysis
… between 250°C and 350°C, possibly due to the phosphorus content of the tiles. The non-destructive analysis of a tile from the Djoser Step Pyramid, reported in this thesis, has yielded results using methods of x-ray fluorescence, environmental scanning electron microscopy, x-ray energy …
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Is the grass really greener on the other side?
… was to determine whether additional nitrogen, phosphorus and water, to a savanna would alter the vegetation quality enough to influence the feeding behaviour and diet of the ungulate populations both of which would alter the vegetation quantity. The study was conducted in the Kruger National …
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The effect of varying food-to-microorganism ratios on phosphate uptake in an activated sludge environment
… Certain samples were measured for sludge total phosphorus content. Results obtained showed that both the biological and chemical processes have roles in phosphate uptake, but it was concluded that phosphate removal is predominately biochemical in nature. It was also found that physical …
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The distribution of phosphorus in the nature preserve at the Clark County Wetlands Park in Las Vegas, Nevada
… thesis was to investigate the distribution of phosphorus among three different compartments of the Upper Pond at the Nature Preserve at the Clark County Wetlands Park in Las Vegas, NV: influent and effluent water, sediments, and plants. Samples were collected from September 2002 to January of …
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Impact of Substrate on Nutrient Removal in In-Ditch Bioreactors
… it to nearby waterbodies. The high nitrogen and phosphorus content in this water leads to negative effects, such as eutrophication in the receiving waters. In-ditch bioreactors are a simple, inexpensive treatment technology that could potentially remove nitrogen and phosphorus from agricultural …
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Mechanistic and spectroscopic methods for identifying reactive intermediate structures and active site properties over metals, metal oxides, and metal phosphides
… (ΔH‡) for C-O bond rupture indicate that the phosphorus content decreases the ΔH‡ for 3C-O bond rupture relative to that of 2C-O bond rupture. Sites that bind the reactive intermediates for both 3C-O and 2C-O bond rupture resemble those that bind CO*, NH3*, and H* on Ni, Ni12P5, and Ni2P …
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The effect of alternative detergent builders on the nutrient removal activated sludge sewage treatment process
… the highly eutrophied water bodies with a high phosphorus load still receive up to 90 of their phosphorus input from effluents discharged by sewage treatment works (Pretorius, 1983). The phosphorus content of domestic sewage originates from two main sources, namely human waste {±60) and …
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Septic tank nutrients in groundwater entering Lake Sallie, Minnesota
… table, and entered the lake within 9 m of shore. Phosphorus was fixed in the soil-near the septic tank but. 40% of the effluent nitrogen reached the lake. Sampling lakeward and landward of five septic tanks indicated that nitrate and possibly ammonium ions travel in groundwater and that nitrogen …
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Plants in urban brownfields: modeling the driving factors of site conditions and of plant functional group occurrence in a dynamic environment
… time, being mostly contingent on site age, soil phosphorus content, soil water permeability and plant available water. The thesis highlights that the environmental conditions on site but to an even greater extent the spatial conditions of the present site mosaic are crucial factors for the …
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Screening of indigenous forage legumes as potential fodder crops and protein source for livestock in Central Namibia
… NDF ranged from 30.5 ± 1.6 to 42.4 ± 1.8 % DM. Phosphorus content was similar (P ˃ 0.05) among legumes. L. Purpureus and the indigenous legumes O. burchellii and V. lobatifolia have potential as fodder and protein source ipso facto could contribute substantially to improving nutrition of …
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Phosphorus Transport and Distribution in Kentucky Soils Prepared Using Various Biochar Types
… an issue that is gaining popularity day by day. Phosphorus transfer from agricultural soils is an important environmental issue that is being closely observed as the transport of phosphorous to water bodies is adversely affecting water quality due to accelerated eutrophication. It is important to …
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A comparison of two phosphorus soil tests as inputs to a pasture growth model : a thesis presented in partial fulfilment of the requirements for the degree of Master of Agricultural Science in Soil Science at Massey University
… between plant growth and extractable soil phosphorus and between fertilizer phosphorus and extractable soil phosphorus respectively. The purpose of the studies was to provide information with which to quantify the parameters of a simple model designed to predict relative pasture yield as a …
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Heterologous Expression of Arabidopsis Thaliana Purple Acid Phosphatase Gene (Atpap15) in Crops for Phytoremediation of Sites Contaminated with Excess Phosphorus
… pH with maximal activity at pH 4.5. AtPAP15 is a phosphorus starvation inducible (PSI) gene that is expressed highly during phosphorus deficient conditions. In the current study, AtPAP15 was overexpressed in Nicotiana tabaccum under cauliflower mosaic virus (CaMV35S) constitutive promoter. After …
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FACTORS AFFECTING THE AVAILABILITY OF IRON IN WHEAT BRAN AND PEA BRAN
… diet was fortified with K2HPO4 to provide a phosphorus content similar to that in the wheat bran diets. The a-cellulose and white flour diets were fortified with 18 ppm iron as ferrous sulfate. The bioavailability of iron was evaluated by comparing the hemoglobin-iron gain per intake of iron …
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Synthesis and characterization of new polycarbonate material systems
… was found to increase with an increase in the phosphorus monomer content as measured by the two respective methods. Cone calorimetry was also performed on the samples to determine the heat release rate, which reflected an increase in the fire resistance properties with an increase in the …
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