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Articles 1 - 5 of 5
Full-Text Articles in Physical Sciences and Mathematics
Delineation Of Mass Movement Prone Areas By Landsat 7 And Digitial Image Processing, Shiloh Marie Howland
Delineation Of Mass Movement Prone Areas By Landsat 7 And Digitial Image Processing, Shiloh Marie Howland
Theses and Dissertations
The problem of whether Landsat 7 data could be used to delineate areas prone to mass movement, particularly debris flows and landslides, was examined using three techniques: change detection in NDVI (Normalized Difference Vegetation Index), change detection in band 5, and the tasseled cap transformation. These techniques were applied to areas that had recently experienced mass movement: Layton, Davis County and Alpine, Spanish Fork Canyon and Santaquin, Utah County. No distinctive spectral characteristics were found with any of these techniques with two possible explanations: 1. That despite improved spatial resolution in Landat 7 over its predecessors and improved digital image …
Effect Of Heavy Metals On Bacteria, Elena Vratonjic
Effect Of Heavy Metals On Bacteria, Elena Vratonjic
Theses and Dissertations
Heavy metals have become devastating environmental contaminants due to their widespread use in the manufacture of electronics, plastics, batteries and dyes. The discharge of heavy metals into the environment has caused concern about their effects on the ecosystem. Many metals are essential for growth in small amounts. However, at higher concentrations heavy metals are toxic because they bind to organic compounds. This accounts for their effects on some important parts of the cell structure, like their ability to denature protein molecules. The initial objective of this study was to find out the growth rate of E.coli and M.roseus in the …
Characterization Of Environmentally Friendly Polymers: Amylopectin And Its Blends, Mohammad Osman Melibari
Characterization Of Environmentally Friendly Polymers: Amylopectin And Its Blends, Mohammad Osman Melibari
Theses and Dissertations
Biodegradable polymers are desirable for a variety of applications, such as in packaging, agriculture, and medicine. Its biological degradation by microorganisms accelerated the interest in biodegradable polymers during the last decades. Within this group of innovative environmentally friendly biodegradable polymers, starch or Amylpectin plays a predominant role, due to their potential biodegradability. This research was attempted to characterize Amylopectin to obtain its physio-chemical properties. In addition, characterizations were extended to include blends of Amylopectin and biodegradable diluents. Blends of Amylopectin with biodegradable diluents including Polycaprolactone, Poly(DL-lactide-co-glycolide), and Poly(3- hydroxybutyric acid) were prepared. The physical properties and the thermodynamic characteristics of …
Effect Of Geochemical Processes And Environment On The Spatial Pattern Of Selenium In Soil, Surface Water, And Groundwater At The Hovland Ranch, Central South Dakota, Salah U. Sharif
Theses and Dissertations
The objective of this paper is to test and review some of the published hypotheses as that may relate to selenium geochemistry in soil and water system at the Hovland Ranch, Haakon County, South Dakota. Representative samples were collected from soil, water, and soil moisture in the field. Preparation of samples and chemical analysis were done in the Water Quality Laboratory, Dept. of Geology and Geological Engineering, University of North Dakota and Human Nutrition Research Center Lab, USDA/ARS, Grand Forks, North Dakota. The analysis results were statistically analyzed to find correlation between the occurrence of selenium and other associated chemical …
Development Of A Regional Curve To Relate Discharge And Drainage Area To Hydraulic Geometry For The Red River Of The North Basin, Melanie H. Johnson
Development Of A Regional Curve To Relate Discharge And Drainage Area To Hydraulic Geometry For The Red River Of The North Basin, Melanie H. Johnson
Theses and Dissertations
Restoration of riparian corridors and stream channels is important for many reasons, including preserving water quality, maintaining channel stability and controlling floods. Regional hydraulic geometry curves allow estimation of stable hydraulic geometry relationships that are necessary to engineer successful restoration projects. These curves can also be used to approximate discharge data for ungaged streams with lmown hydraulic geometry and drainage area. Hydraulic geometry data were collected in the field for twenty-five stream gage sites in the Red River of the North Basin. Recurrence intervals for bankfull ranged from 1.2 to 1.6 years, with an average recurrence interval of 1.4. Discharge …