The red drum (Sciaenops ocellatus) is important for recreational fishing and aquacultural production in Texas' coastal waters and elsewhere in the nearshore Gulf of Mexico and in subtemperate to subtropical areas of the western North Atlantic Ocean. I performed indoor-tank and outdoor-pond experiments, in conjunction with automa ted respirometry and ecophysiological modeling, to assess interacting effects of temperature, dissolved-oxygen concentration (DO) and feed energy density on survival, growth, metabolism, and other measures of juvenile red drum performance. The main objective was to test an energy/metabolism tradeoff hypothesis, which states that growth of fish exposed to high temperatures can be limited by available feed energy; whereas, growth of fish exposed to lower temperatures can be limited by their metabolic capacity to exploit available feed energy. Also, I examined the influence of DO on this relationship and evaluated the effects of cyclical regimes of temperature and DO on fish performance. Insights from laboratory-based feeding trials were incorporated in experiments conducted in hatchery ponds to assess effects of oxygen supplementation and dietary additives - nucleotides and prebiotics - on performance in a more natural setting. In examining these issues, various technologies were developed. These included a computer-based apparatus for autonomously inducing cyclical regimes of temperature and DO in experimental tanks over an extended period of time. Additionally, I developed a soft feed with low energy-density to simulate natural forage. Experimental results supported the principal research hypothesis: At high temperature and DO, ecophysiological performance of juvenile red drum was enhanced by feeding to satiation with a high-energy feed (15.9 kJ/g) versus with a foragesimulating feed having lower energy density (4.1 kJ/g). Cyclical regimes of temperature and DO - as imposed in my particular laboratory experiments -did not impart growth benefits; however, the potential for enhanced growth via an appropriate cyclical environmental regime remains intact. Results from outdoor-pond experiments were consistent with laboratory results; however, the strong positive effect of feed energy density overwhelmed potential effects of dietary additives or oxygen supplementation on growth.

This research includes two parts as mentioned: (I) High efficiency red organic electroluminescent devices and (II) High efficiency white organic electroluminescent devices with broadband EL emission spectrum based on a single emitting layer. In part (I), we fabricated the high efficiency red organic electroluminescent devices incorporating 1,3,5-Tri(1-pyrenyl)benzene(TPB3) as the host material and 4-(dicyanomethylene)-2-tert-butyl-6(1,1,7,7-tetramethyljulolidyl-9-enyl)-4H-pyran (DCJTB) as the dopant. The highly efficient energy transfer arose as a result of (i) perfect overlap between the PL spectrum of TPB3 and the absorption spectrum of DCJTB and (ii) the high fluorescence quantum yield of TPB3. A device having the configuration ITO(1300 Å)/ NPB(650 Å)/ TPB3: 2% DCJTB(400 Å) / Alq3(300Å) / LiF(8Å) / Al(2000 Å) exhibited a maximum luminance at 13.5V of 70600 cd/m2, ca. four times higher than that of the device using Alq3 as the host material at the same potential. The device¡¦s current efficiency was 4.38 cd/A and its power efficiency was 2.12 lm/W at 20 mA/cm2;the maximum current and power efficiencies were 4.83 cd/A and 3.7 lm/W, respectively. The current and power efficiencies were greater than 4 cd/A and 1 lm/W, respectively, over the large range of potentials (3.5~13.5V) with good Commission Internationale de l¡¦Eclairage (CIE) coordinates of (0.63,0.37). These results indicate that searching for a suitable host material is a promising approach toward achieving high-efficiency red OLEDs. In part (II), we fabricated high-efficiency and color-stable broadband white organic electroluminescent devices based on a single emission layer, incorporating a green light-emitting host material which has large band gap and large Stoke¡¦s shift, doped with a red and a blue dye. TPB3 was used as the host material, and the red and blue light-emitting dyes were DCJTB and di(4-fluorophenyl)aminodi(styryl)biphenyl (DSB), respectively. A device having a simple configuration ITO(1300 Å) / NPB(650 Å) /TPB3: 10% DSB: 0.6% DCJTB(400 Å)/ Alq3(300Å) / LiF(8Å)/Al(2000 Å) exhibited a broadband white emission with a maximum luminance at 14.0 V of 81000 cd/m2, maximum current efficiency of 5.9 cd/A at 10.0 V, maximum power efficiency of 3.2 lm/W at 4.0 V. The Commission Internationale de l¡¦Eclairage (CIE) coordinates of (0.34,0.38) changed slightly over the large range of potentials (4~14.5 V). The high-efficiency¡Bhigh-bright and color-stable may be attributed to the high electroluminescence character of the host and the dopants, relatively high energy transfer from host to red dopant, and effective carrier-direct-recombination on a blue dopant, and the confinement of charge recombination zone in a single layer.

Thesis (M.S.) in Ecology and Environmental Science--University of Maine, 2009. / Includes vita. Includes bibliographical references (leaves 69-73).

Thesis (M.S.)--West Virginia University, 2003. / Title from document title page. Document formatted into pages; contains xi, 118 p. : ill. (some col.), maps (some col.). Includes abstract. Includes bibliographical reference.

Thesis (M.S.)--Florida State University, 2003. / Advisor: Dr. Frances C. James, Florida State University, School of Arts and Sciences, Dept. of Biological Science. Title and description from dissertation home page (viewed Sept. 26, 2003). Includes bibliographical references.

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The Red Lake greenstone belt is considered to be one of Canada’s premier gold producing regions with the Red Lake Gold Mines having produced >24 million ounces of gold to date. The East Bay Trend is a large structural corridor that parallels the East Bay of Red Lake, Ontario and is interpreted to be a manifestation of the regional D1 structure that crosscuts this complexly folded greenstone belt. The southernmost 8 km of this corridor is host to a variety of small gold deposits that demonstrate an assortment of mineralization styles. This study aims to: (1) better define veining styles and characterize the mineralizing fluids using petrography, fluid inclusions, geochronology and stable isotopes, (2) compare barren and auriferous veins from deposits along the East Bay Trend, and (3) compare the fluid history of the East Bay Trend to the Campbell-Red Lake gold deposit to determine the gold potential along this trend.

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Greenstone belts have been recognized as highly prospective settings for high grade gold mineralization, and are host to a number of world class quartz-carbonate vein deposits, which account for approximately 13% of the cumulative global gold production. In Canada, the Archean Red Lake Greenstone Belt hosts one of Canada’s richest gold districts (cumulative production to 2008 of over 24 M oz at 0.461 oz/t). Recently, there have been many discoveries in the district including the Gold Eagle occurrence (also referred to as the Bruce Channel Deposit and Cochenour project), which has an inferred resource of 2.7 million ounces of gold at an average grade of 11.04 g/t Au. The auriferous ore zones in the Gold Eagle Deposit are hosted in volcano-sedimentary rocks of the Balmer Assemblage (2.99-2.96 Ga), which is controlled by a major north trending, west dipping deformation corridor sub-parallel to the Balmer Assemblage-Bruce Channel Assemblage contact. The vertical extent of the mineralization is controlled by the “Cochenour Thrust” that extends into the adjacent Cochenour-Willans Mine. The four main ore zones are structurally controlled within a NS, west dipping fault corridor and consist of: 1) the quartz-actinolite zone; 2) banded iron formations, 3) sulphide replacement zones and 4) footwall ore zones. The deposit has undergone pervasive pre-ore biotite and carbonate alteration, two gold events with the first associated with silicification and late actinolite-tremolite and the second associated with arsenopyrite sulphidation and iron-rich biotite and post-ore quartz and carbonate veinlets. Late faults (including black line faults) have contributed to the complexity and discontinuity of the ore bodies. / Thesis (Master, Geological Sciences & Geological Engineering) -- Queen's University, 2012-03-30 10:53:12.446