Observations on recruitment of postlarval spiny lobsters, Panulirus argus, to the south Florida coast

(Document has 34 pages.

An Investigation of Publicity Programs of Interschool Athletics in AA Schools of Texas

A great majority of schools in the United States are supported ty taxation. There exists a responsibility on their part for reporting their activities to the public. Inasmuch as interschool athletics is a part of education and because of the many phases in which the community is interested, public administrators may create situations to inform the public and gain the support that is needed. Too many people having the responsibility of informing the public of the importance of athletics have failed to do so. Thereby, causing unfavorable publicity as to the educational part that athletics play in today\u27s school and democratic living. The purpose of this study is to accomplish the following: To develop awareness of the importance of athletics in a democracy. To give to the public the infomation to which it is entitled about its athletic teams. To obtain financial support. To correct misunderstanding and inform the public of plans, policies and regulations. This study was limited to the 54 AA High Schools of Texas. The data will also be limited to the aspect of publicity which have to do with interscholastic athletics

Lands Available for Mineral Leasing

14 pages. Contains references

An investigation of a salt-dome environment at South Timbalier 54, Gulf of Mexico

Salt domes have been studied in the Gulf Coast region to look at how, why, and where saline waters are located within these field areas. Fluid flow model and pathway studies can be helpful to the research of saline water migration because it can be correlated to hydrocarbon migration in petroleum exploration. The South Timbalier 54 field occurs over a salt dome that sits at approximately 3,048 meters beneath the seafloor. Two major faults were found originating from the salt dome up into the shallow section of the field. The sands were deposited in fluvial, deltaic, or marine environments. The original salinity of these sediments would be between 0 to 35 g/L if the fluids in the pore space were the original fluids. Salinity logs were calculated for forty wells surrounding the salt dome to locate any presence of salinities outside of 0 to 35 g/L. The Revil et al. method (1998) was used to estimate salinity from the data of the gamma ray, density, and resistivity log. Saline waters were found to be located in this field and the values could be group into four salinity zones. Each zone represents a change in the value of salinity from the shallowest to the deepest log. The first zone contains values of 20 to 30 g/L, the second contains values from 60 to 130 g/L, the third contains values from 30 to 45 g/l, and the fourth zone contains values from 60 to 110 g/L. Mud weight data from a well near the salt dome shows that the top of overpressure is between 3,657 meters and 3,962 meters. The fluids are forced out of overpressure up the side of the salt dome. These fluids dissolved the salt to create the high salinities and then were forced into the major faults. Through these faults the saline waters were expelled into the adjacent sediments creating the high salinity zones of the field by using the faults as a migration pathway. The low values of zones one and three represent infiltration of brackish waters and a possible low permeability zone respectively

Lands Available for Mineral Leasing

14 pages. Contains references

CARBON QUANTUM DOTS: BRIDGING THE GAP BETWEEN CHEMICAL STRUCTURE AND MATERIAL PROPERTIES

Carbon quantum dots (CQDs) are the latest generation of carbon nanomaterials in applications where fullerenes, carbon nanotubes, and graphene are abundantly used. With several attractive properties such as tunable optical property, edge-functionalization, and defect-rich chemical structure, CQDs have the potential to revolutionize optoelectronics, electro- and photocatalysis, and biomedical applications. Chemical modifications through the addition of heteroatoms, chemical reduction, and surface passivation are found to alter the band gap, spectral position, and emission pathways of CQDs. Despite extensive studies, fundamental understanding of structure-property relationship remains unclear due to the inhomogeneity in chemical structure and a complex emission mechanism for CQDs. This dissertation outlines a series of works that investigate the structure-property relationship of CQDs and its impact in a variety of applications. First, this relationship was explored by modifying specific chemical functionalities of CQDs and relating them to differences observed in optical, catalytic, and pharmacological performance. While a number of scientific articles reported that top-down or bottom-up synthesized CQDs yielded similar properties, the results herein present dissimilar chemical structures as well as photoluminescent and metal sensing properties. Second, the role of nitrogen heteroatoms in top-down synthesized CQD was studied. The effect of nitrogen atoms on spectral position and fluorescence quantum yield was considerably studied in past reports; however, thorough investigation to differentiate various nitrogen related chemical states was rarely reported. By finely tuning both the quantity of nitrogen doping and the distribution of nitrogen-related chemical states, we found that primary amine and pyridine induce a red-shift in emission while pyrrolic and graphitic nitrogen produced a blue-shift in emission. The investigation of nitrogen chemical states was extended to bottom-up synthesized CQDs with similar results. Finally, top-down, bottom-up, nitrogen-doped and chemically reduced CQDs were separately tested for their ability to act as photodynamic anti-cancer agents. This series of experiments uncovered the distribution of reactive oxygen species produced during light exposure which elucidated the photodynamic mechanisms of cancer cytotoxicity. The results presented in this dissertation provide key insight into engineering finely-tailored CQDs as the ideal nanomaterial for a broad range of applications

Reactivity changes during startup in large nuclear rockets

Large uranium 235 nuclear rockets - reactivity changes during startup by hydrogen density and core temperature variation