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 96 for “"Growth chamber"”.
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EFFECT OF TEMPERATURE, AERATION, NUTRITION AND GENOTYPIC DIFFERENTIALS ON RESPONSES OF ZOYSIA SPECIES TO IRON STRESS
… reactions to Fe-stress were grown under either growth chamber or greenhouse conditions in a series of four separate experiments. Genotypes grown in the growth chamber studies were subjected to three temperature ranges (18-12(DEGREES)C, 30-21(DEGREES)C, a
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Analysis of symptom expressions and transmission rates caused by the plant pathogen Phytophthora ramorum on native chaparral plants from the genus Arctostaphylos
… <em>A. pumila</em> in field experiments and in growth chamber experiments. Additionally, symptom development on <em>A. densiflora Howard McMinn</em> and <em>A. densiflora Sentinel</em> cultivars was also studied in growth chamber experiments. Foliage and roots of <em>A. glauca, A. silvicola, A. …
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Chemical beam, gas-source molecular beam, and molecular beam epitaxial growth of III/V compound semiconductor materials
A new and unique high vacuum crystal growth system has been developed. The gas source molecular beam/chemical beam epitaxial growth system features a 7000 l/s diffusion pumping system mounted directly beneath a molecular beam epitaxial growth chamber. After careful thermal cleaning of the new …
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Soil Respiration of Native Saskatchewan Grassland Calculated from Carbon Dioxide Concentration Profiles
… upper and lower plans of a soil layer. Field and growth chamber data, collected over a three year period, is presented. Evolution and production of CO2 was highly correlated with soil moisture in both the field and growth chamber studies. Significant correlations were also obtained between CO2 …
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Some Physiological Effects of Glyphosate on Cocklebur Plants and Cultured Carrot Cells
… plants were grown in nutrient culture in a growth chamber and were treated with 15 (mu)g of glyphosate (N-{phosphonomethyl}glycine) at 13 days of age. Methyl-('14)C-glyphosate was applied in one experiment.
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The effect of oily waste and nutrient amendments on soil fertility and oat growth
Growth chamber and incubation experiments were conducted with a sandy, marginal agricultural soil from the Brown soil zone near Richmound, Saskatchewan. The objective of the study was to determine how oily waste from heavy oil upgrader affects soil fertility, plant growth and microbial activity …
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Evaluating the Cross-Contamination Risks of Salmonella and Generic Escherichia coli on Agricultural Ground Covers in Produce Pre-Harvest Production
… the ground. Due to the benefits of plant growth and pest management, agricultural ground covers are a common horticultural practice implemented in the fresh produce production environment and produce may come into contact with these ground covers. Thus, this thesis aims to (i) quantify the …
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Evaluations of soybean genotypes for drought tolerance and charcoal rot resistance
… experiment tested the 41 SoyNAM parents in a growth chamber based on sudden water depletion drought stress assessed by image-based ratings. Soybean genotypes for both the greenhouse and growth chamber tests were significant (P < 0.01), and there was a positive correlation (r = 0.37, P = 0.02) …
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Control of Thin-Film Silicon Microstructure With Low-Energy Particle Bombardment in Reactive Sputtering
Hydrogen can be added to the growth chamber to promote a phase change to nanocrystalline silicon at moderate growth temperatures. The growth flux with hydrogen includes energetic (∼100eV) neutral H, produced by the reflection of H2+ions from the target. We determine the kinetic role of these …
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Interaction Between Two Root Pathogens and the Epidemiology of Pyrenochaeta Glycines on Soybeans
… a root rot of soybeans was studied in the growth chamber and field. Disease incidence and severity tended to be higher and dry weights lower for plants inoculated with F. oxysporum + R. solani in comparison to either F. oxysporum or R. solani alone and the controls. In addition, competition …
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Assessing the role of soil chemoautotrophs in carbon cycling: An investigation into isotopically labelled soil microorganisms
… them to a suite of scientific techniques. A growth chamber was used to propagate extant soil chemoautotrophic bacteria from different soils and subjected to an array of chemical and biological analyses. The growth chamber was used to measure CO2 concentrations and introduce stable isotopic …
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BIOCONTROL OF ROOT ROT COMPLEX IN FIELD PEA AND LENTIL AND COMPLETE GENOME ANALYSIS OF BIOCONTROL BACTERIA
… agents against ARR in field pea under controlled growth chamber condition. Therefore, the purpose of this study was to i) investigate the potential for biological control of RRC caused by A. euteiches, F. avenaceum and F. oxysporum and ii) unravel the mechanisms by which biocontrol was achieved. …
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Evaluation of physiological and morphological basis for drought resistance in maize and sorghum
… in plants grown in a controlled environment growth chamber under constant environmental conditions (12/12h day/night, 28-32/17 °c day/night temperature, 60-80% RH and PPFD of 1200-1400 umol m-2 S-1), at the Department of Botany, University of Cape Town.
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A Comparison of the Herbicidal Activity of Several Chloroacetamides and Their Effects on Protein Synthesis in Carrot and Soybean Cell Suspension Cultures
… were compared in field, growth chamber and cell suspension culture studies. In the field, herbicide phytotoxicity, efficacy on Setaria species and Amaranthus blitoides S. Wats. and crop yield were determined. Due to a large degree of variability among experiments and …
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Evaluation of Downy Mildew (Peronospora farinosa f.sp. chenopodii) Resistance among Quinoa Genotypes and Investigation of P. farinosa Growth using Scanning Electron Microscopy
… the plants to specific humidity cycles in a growth chamber. After inoculation of five quinoa-breeding lines in a growth chamber, accession 0654 was found to be the most resistant, while genotypes NL6 and Sayana showed moderate resistance. Each of these genotypes displayed some potential for …
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Corn root growth and distribution as influenced by soil physical properties
Mechanisms of root growth under variable field conditions were investigated by observing corn ( Zea mays L.) root growth and distribution in the field and by observing the influence of soil physical stresses on corn seedling root growth in controlled environments. The field soil was Groseclose silt …
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Impact of free-living diazotrophs, Azospirillum lipoferum and Gluconacetobacter azotocaptans, on growth and nitrogen utilization by wheat (Triticum aestivum cv. Lillian)
… use could be the exploitation of plant growth-promoting bacteria, capable of enhancing growth and yield of many plant species. Azospirillum and Gluconacetobacter are root colonizing, free-living, N2-fixing bacteria (diazotrophs) with the potential to transfer fixed N to associated …
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EXTENSIVE GREEN ROOF SUBSTRATE COMPOSITION: EFFECTS OF PHYSICAL PROPERTIES ON MATRIC POTENTIAL, HYDRAULIC CONDUCTIVITY, PLANT GROWTH, AND STORMWATER RETENTION IN THE MID-ATLANTIC.
… conductivity, matric potential, and plant growth. Several commercial substrate blends were tested for durability against successive freeze/thaw cycles with before and after-treatment granulometric distribution analyses. All substrate blends showed significant (p<0.05) particle degradation …
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Photoperiod sensitivity in tropical maize accessions, early inbreds, and their crosses
… under decreasing periods of light in the growth chamber. The testcrosses were also evaluated in three field environments;Significant differences were found among populations and testers per se and among testcrosses for days to tassel emergence in the growth chamber evaluations. Days to …
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The development of process kinetics for a waste treatment system utilizing filamentous microorganisms
… effluent, and percent COD remaining in the final growth cell of the growth chamber increase as the dilution rate or flow rate increase. The study also showed that an organic waste can be effectively treated by a filamentous system over an influent pH range of 2.65 to 7.45 with an oxygen …
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