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 157 for “"elemental composition"”.
-
Genetic improvement of aphid resistance, protein, and elemental composition in soybean
… of this study was to map QTL controlling the elemental composition of soybean seed. The ionome of seed samples from two environments (Illinois 2012 and Nebraska 2012) of the soybean nested association mapping (NAM) project were analyzed for elemental concentration of 20 traits. These data were …
-
Investigation of the structure and elemental composition of 2D Interfaces in Transition Metal Dichalcogenides
… a need to understand the structural and elemental composition of the 2D materials to atomic scales, and this is where techniques like (scanning) transmission electron microscopy (S)TEM and energy-dispersive x-ray spectroscopy (EDX) come to aid. In this study, we will discuss sample …
-
Chemical Elemental Composition from Vineyard Soil to Wine in Hawke’s Bay and Marlborough, New Zealand
The main aim of this study was to determine the elemental composition of matrices comprising the soil to wine journey. Two different viticultural management practices, herbicide-applied ‘contemporary’ and non-herbicide-applied ‘future’, were compared. All samples originated from Marlborough and …
-
Investigation of the crystal structure, elemental composition and peculiarities of ionic transport in Li+ solid electrolytes /
The influence of the structure and elemental composition of lithium solid electrolytes on their electrical properties are investigated in the dissertation. The technological conditions of lithium solid electrolyte ceramics‘ fabrication (synthesis and sintering) are described. Also the results of …
-
Responses of zooplankton to variation in elemental composition of algae: Regulation at individual and ecosystem levels
… regulations of both elements, the relative composition in C, N and P of faeces produced by zooplankton at a certain time must reflect the average elementary requirements of the entire zooplankton community. We have indeed observed a good correlation between the stoichiometrical …
-
Studies on humus: I. Statistical studies on the elemental composition of humus. II. The humin fraction of humus
Includes bibliographical references (pages 239-262).
-
ELEMENTAL COMPOSITION AND NUTRIENT EFFECT ON THE UPTAKE AND METABOLISM OF DISSOLVED ORGANIC CARBON BY BACTERIA FROM A TEMPERATE REGION RIVER
… and internal organic C sources to bacterial decomposition in the Chickahominy River using a long term incubation approach. In addition the elemental composition of each organic C substrate is investigated as a predictor of OC source bioavailability. The results of sole source incubations showed …
-
Electrofacies, elemental composition, and source rock characteristics along seismic reflectors of the Vaca Muerta Formation in the Loma La Lata area, Neuquen Basin, Argentina
… defined. Cuttings were analyzed for elemental composition, mineralogical makeup, and source rock characteristics. Cuttings at the base of the section proved to be good source rock and enriched in trace metals, with declining quantities up-hole. Seismic data was interpreted to …
-
The factors and protocols that influence, accuracy, precision and uncertainty of accurate mass measurements by FT-ICR ms to validate the assignment of elemental composition
… of correct identification and with the limits of elemental analysis; a fast, robust analytical solution is sought. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) is a very powerful tool for undertaking accurate mass measurements because of its high resolving power and mass …
-
Forensic Soil Analysis: Characterization of the Sand Fraction
… of soil by examining particle size, elemental composition, and percent organic matter in soil, and to determine its forensic applicability. In this study, five soils of varying geological locations were examined including two samples from Kentucky; two samples from Pennsylvania; and …
-
Identification of platinum ores via trace element signatures
This project studies the natural variation in the elemental composition of processed platinum ore from different extraction locations in South Africa in order to assess whether this provides sufficient information for the elemental fingerprinting" of the material.
-
Evaluating the Leachability of Elements from Residuals Generated by Hydraulic Fracturing in Marcellus Shale
… of laboratory techniques to determine their elemental composition and the potential for the elements to leach from the landfill. Strong acid digestion using a 3:1 combination of nitric acid to hydrochloric acid in a microwave with closed vessels was used to determine overall elemental …
-
Extractant Impregnated Membranes for Cr(III) and Cr(VI)
… ionic strength, extractant concentration, composition of source phase, and choice of stripping agent and stripping agent concentration. Optimum conditions for Cr(VI) and Cr(III) were determined to be 1 v/v% Aliquat-336 and 30 v/v% DEHPA; an extraction time of at least 3-5 days; source phase …
-
Experimental Investigation of Elemental Incorporation in the Otoliths of Larval and Juvenile Fish: Implications for Use as Environmental Recorders
… of the most promising techniques is the use of elemental signatures in fish otoliths (ear stones), which record valuable life history data and serve as the link between fish and their environment. To validate the assumption that otolith elemental composition is a function of water elemental …
-
Quantitative Apportionment of Urban Aerosol Mass by Factor Analysis
… are contributing to the system, determine the elemental composition of the particles emitted by each source, and estimate the amount of material that each source contributed to each sample.
-
SAMPLE INTRODUCTION AND INSTRUMENTATION IN PLASMA SPECTROMETRY
… accepted technique for the determination of the elemental composition of a wide range of sample types. The successful introduction of volatile organic solvents has however been limited, due to the resulting high solvent loading of the plasma and subsequent plasma instability. The design, function …
-
Single-Cell Measurements of Element Concentration In Phytoplankton Using Synchrotron X-Ray Fluorescence
<p>The elemental composition of phytoplankton is of interest because of their role in the biogeochemical cycles of carbon and other bioactive elements. Phytoplankton also can serve as the point of introduction for metal contaminants into aquatic food webs. Single-cell analysis of phytoplankton …
-
Crystal engineering of novel organic-inorganic compounds of N- and O-donor dipyridyl ligands
… compounds. Microanalysis was used to confirm elemental composition.
Page 1 of 8