| Hypoxia-sensitive, Multifunctional Nanoparticles for Targeted Drug Delivery to Breast Cancer |
Sep 2012 |
24 pages |
| Authors:
Seongbong Jo; Han-Joung Cho; Jung-Eun Base; Vivek K Garripelli; MISSISSIPPI UNIV UNIVERSITY
|
 | We obtained polymeric nanoparticles containing redox-sensitive moieties, which can be removed by chemically or enzymatically triggered reduction. Since the trimethyl lock-based functional groups undergo the triggered reduction to release a lactone and expose free hydrophilic functional groups, a class of trimethyl lock chemistry-based monomers were synthesized and polymerized to obtain biodegradable polymers for the redox-sensitive nanoparticles. Nanoparticles were prepared from the redox-sensitive biodegradable polymers via an emulsion method. The dynamic ... |
|
| Detection of Humans and Light Vehicles Using Acoustic-to-Seismic Coupling |
31 Aug 2009 |
12 pages |
| Authors:
James M Sabatier; Alexander E Ekimov; MISSISSIPPI UNIV UNIVERSITY
|
| Heavy vehicles, such as tanks or other armored vehicles, can typically be detected using seismic sensors and sensors to detect low-frequency engine noise; light vehicles are harder to detect, particularly in high noise areas. The objective of this research effort was to conduct studies in the detection of light vehicles using sensor and signal processing techniques developed for human detection by the University of Mississippi under the MURI grant W911NF-04-1-0190. ... |
|
| Structure-Activity Relationship Studies on the Mosquito Toxicity and Biting Deterrency of Callicarpenal Derivatives |
Jan-2009 |
13 pages |
| Authors:
James Becnel; Jerome A Klun; Charles L Cantrell; Julia Pridgeon; Green; Solomon III; Frank R Fronczek; MISSISSIPPI UNIV UNIVERSITY
|
| Callicarpenal (=13,14,15,16-tetranorclerod-3-en-12-al=[(1S,2R,4aR,8aR)-1,2,3,4,4a,7,8,8a-octahydro-1,2,4a,5-tetramethylnaphthalen-1-yl]acetaldehyde; 1) has previously demonstrated significant mosquito bite-deterring activity against Aedes aegypti and Anopheles stephensi in addition to repellent activity against host-seeking nymphs of the blacklegged tick, Ixodes scapularis. In the present study, structural modifications were performed on callicarpenal (1) in an effort to understand the functional groups necessary for maintaining and/or increasing its activity and to possibly lead to more effective insect control agents. All modifications in this ... |
|
| Advances in Acoustic Landmine Detection |
01 OCT 2006 |
11 pages |
| Authors:
James A. Sabatier; MISSISSIPPI UNIV UNIVERSITY
|
| The phenomenon of the acoustic-to-seismic (A/S) coupling of airborne sound into the ground for buried anti-personnel and anti-tank landmine detection is well established [J. M. Sabatier and N. Xiang, IEEE Trans. on Geoscience & Remote Sensing, 39, pp 1146-1154 (2001); N. Xiang and J. M. Sabatier, J. Acoust. Soc. Am, 113, pp.1333-1341 (2003)]. A sound source is used to insonify the ground surface. The airborne sound couples into the soil ... |
|
| Temporal and Spatial Dynamics of DNA Topoisomerase 1 in Prostate Cancer |
JUL 2006 |
12 pages |
| Authors:
Randy M. Wadkins; MISSISSIPPI UNIV UNIVERSITY
|
| The purpose of this proposal was to investigate the response of prostate cancer to a series of camptothecin analogs, which are drugs that target DNA topoisomerase I. This final report summarizes the accomplishments toward the original goals of the project. We note that while some experimental problems were encountered that limited the completion of all tasks, good progress was made overall on the proposed research. |
|
| Temporal and Spatial Dynamics of DNA Topoisomerase I in Prostate Cancer |
01 JAN 2006 |
11 pages |
| Authors:
Randy M. Wadkins; MISSISSIPPI UNIV UNIVERSITY
|
| The purpose of this proposal was to investigate the response of prostate cancer to a series of camptothecin analogs, which are drugs that target DNA topoisomerase I. This final report summarizes the accomplishments toward the tasks outlined in the original proposal for this grant. The goal of the project was to try to understand why, despite the availability of topoisomerase I in prostate cancer, chemotherapeutic agents that target this enzyme ... |
|
| Temporal and Spatial Dynamics of DNA Topoisomerase I in Prostate Cancer |
JAN 2005 |
9 pages |
| Authors:
Randy M. Wadkins; MISSISSIPPI UNIV UNIVERSITY
|
| The purpose of this proposal was to investigate the response of prostate cancer to a series of camptothecin analogs, which are drugs that target DNA topoisomerase I. Toward task 1 of our proposal, we used immunofluorescence staining. However, this did not provide satisfactory results due to non- specificity of the rabbit serum used. We focused predominantly on tasks related to the data obtained from the completed task 3. We developed ... |
|
| Estimating Models of Program Management |
15 DEC 2003 |
6 pages |
| Authors:
Norman K. Womer; Jeff Camm; MISSISSIPPI UNIV UNIVERSITY
|
| This research effort models decision-making behavior in a dynamic, uncertain environment. We derive consistent estimating procedures that model observed data that results from the decisions. This is accomplished by mating a Bayesian econometric process with a dynamic programming model of contractor behavior. This is used to demonstrate the dramatic increases in precision that can be obtained with just a few observations on program cost. The result of this effort can ... |
|
| Personal and Structural Influences on Performance in Dynamic Environments: An Investigation of Social Skill/Intelligence and Social Contingencies |
15 JUL 2003 |
7 pages |
| Authors:
Dwight D. Frink; Gerald R. Ferris; MISSISSIPPI UNIV UNIVERSITY
|
| Research was conducted for clarifying linkages among individual differences in social skill/intelligence constructs, contextual differences in social contingencies (i.e., accountability mechanisms), and performance outcomes. Research suggests that social intelligence may offer relatively high validities for performance prediction, while accountability has consistently shown to be a determinant of behavior, interacting with personal and contextual characteristics. Furthermore, the social contingency nature of accountability (both formal and informal) provides a conceptual linkage with ... |
|
| Automatic Web Searching and Categorizing Using Query Expansion and Focusing |
10 JAN 2003 |
6 pages |
| Authors:
Sumali Conlon; MISSISSIPPI UNIV UNIVERSITY
|
| We are in the process of build a prototype system that improves precision and recall rates for web search using query expansion and focusing techniques. We use linguistic analysis and co-occurrence information to analyze syntactic structures of the users' queries to improve search results. One standard method of improving internet search is through query expansion. The major query expansion techniques add terms using (i) lexical semantic relations and (ii) relevance ... |
|
| Dispositional vs. Situational Goal Orientation: Effects on Self-Efficacy and Performance |
19 DEC 2002 |
4 pages |
| Authors:
Walter D. Davis; Neal Mero; MISSISSIPPI UNIV UNIVERSITY
|
| An experimental study investigated the effects of dispositional goal orientation, task difficulty, and accountability manipulations (outcome, process, none) on situational goal orientation and task performance. Accountability and task complexity was manipulated using a 3 X 2 experimental design. Subjects completed measures of dispositional goal orientation, and initial task self-efficacy. Subjects then were exposed to an accountability manipulation, designed to frame the subjects' situational goal orientation. Subjects then performed a computerized ... |
|
| Applications of Random Methods in Combinatories and Scheduling Problems |
19 DEC 2002 |
5 pages |
| Authors:
Tristan Denley; Talmage J. Reid; Haidong Wu; MISSISSIPPI UNIV UNIVERSITY
|
| The Randomized Graph Coloring research aims to provide an efficient randomized algorithm for solving a specific NP-Hard problem, that of graph 3- coloring problem. The simulations are designed to test the practical behavior of the algorithm. Research in graphs and matroids will provide results publishable in top journals in Discrete Mathematics that generalize the existing literature. The objective of the connectivity research is to provide results about longest cycles and ... |
|
| Role Structure, Non-Monetary Compensation, and Team Incentives as Motivators of Salesperson Performance |
18 DEC 2002 |
6 pages |
| Authors:
Charles H. Noble; MISSISSIPPI UNIV UNIVERSITY
|
| This study considers recruiters as a form of salesperson and uses the extensive literature base in that area to examine issues related to the structure of recruiter roles and various forms of monetary and non-monetary compensation as drivers of effort end performance. A comprehensive model is constructed to test these factors. The findings stress the importance of three factors in particular (perceptions of fairness in reward distribution, perceptions of job ... |
|
| The Influence of Incentives and Monitoring on the Task and Contextual Performance of Navy Recruiters |
30 SEP 2002 |
6 pages |
| Authors:
Neal P. Mero; James R. VanScotter; Rebecca M. Guidice; MISSISSIPPI UNIV UNIVERSITY
|
| This research investigated the effects of different contextual variables such as supervisor monitoring behaviors and incentive systems on individual perception of accountability for different performance components as well as the effect of those perceptions on sales performance and individual attitudes about the organization. A field study of 140 sales personnel using survey and archival data investigated the effects of behavioral and outcome monitoring and incentive systems on the perceptions of ... |
|
| Modeling and Solution Procedures for Diversity Maximization |
01 JUL 2002 |
8 pages |
| Authors:
Gary Kochenberger; Fred Glover; Bahram Alidaee; Keith Womer; MISSISSIPPI UNIV UNIVERSITY
|
| Many important problems involve selecting a subset from a larger population such that the aggregate diversity of the subset selected is a large as possible. This problem, known as the diversity maximization problem, is known to be NP-hard. As such, it is very challenging from a computational point of view and only very small (toy) problems can be solved to optimality. Accordingly, most research into the important area has focused ... |
|
| Challenges of Virtual Teams: The Complex Effects of Personality and Turnover on Trust, Collective Efficacy, Performance, and Member Retention |
30 DEC 2001 |
7 pages |
| Authors:
Ann L. Canty; Andreas Schwab; MISSISSIPPI UNIV UNIVERSITY
|
| Both academics and practitioners have suggested that virtual teams (VTs) allow organizations to address the challenges of increasingly complex and dynamic environments. VTs often encounter unexpected coordination and management problems. The purpose of this study is to investigate the coordination challenges that group turnover, virtual communication, and certain group member personality traits present for the development of functional group structures and processes. The experimental study investigated the effects of group ... |
|
| Studies of Microbaroms Using Multiple Infrasound Arrays |
Oct 2001 |
9 pages |
| Authors:
Henry E Bass; Kenneth Gilbert; Milton Garces; Michael Hedlin; John Berger; John V Olson; Charles W Wilson; Daniel Osborne; MISSISSIPPI UNIV UNIVERSITY
|
| Microbaroms, known to be produced by marine storms, are a prevalent infrasound signal due to the presence of strong storms over the oceans. Often the microbarom wave trains last for tens of hours allowing us to track the storm. When we perform a least-squares fit to plane-wave arrivals on the data we find the apparent source azimuth points to the center of the storm low-pressure center. Early research has shown ... |
|
| RUS Studies of Crypto-Clathrates: Perfect Crystals with the Elastic Properties of Glasses |
04 JUN 2001 |
8 pages |
| Authors:
Veerle Keppens; MISSISSIPPI UNIV UNIVERSITY
|
| The low-temperature thermal and elastic properties of glasses are known to be quite different from those of perfect crystals. For example the specific heat in amorphous solids is much larger than the Debye specific heat of crystals, and the thermal conductivity is considerably smaller. Some disordered crystals and quasicrystals were found to have properties very similar to those found in glasses, but remarkably, no amount of disorder introduced into a ... |
|
| Advancement of a Job- and Personal- Characteristics Placement Model |
31 MAY 2001 |
47 pages |
| Authors:
Dwight D. Frink; David E. Terpstra; MISSISSIPPI UNIV UNIVERSITY
|
| Research toward validation of a comprehensive model mapping personal characteristics onto differentiated job characteristics for effective placement, development, and retention of Navy personnel is described. Increased effectiveness may operate via a more precise multivariate matching of person to job characteristics, resulting in increased psychological, social, and physiological well-being, contentment with the job and work, extra-role behaviors, and effectiveness in tasks and in jobs. Such improved matching should also reduce negative ... |
|
| Acoustic Cruise Missile Detection: System Concept |
Aug-1999 |
5 pages |
| Authors:
MISSISSIPPI UNIV UNIVERSITY
|
|
| A New Framework for Large Scale Data Envelopment Analysis (DEA) |
MAY 1999 |
39 pages |
| Authors:
Jose H. Dula; MISSISSIPPI UNIV UNIVERSITY
|
| This project proposes to investigate a new framework for large scale DEA studies that will reduce computation times and increase analysis flexibility. The methodology is based on an initial extraction of essential elements known as extreme efficient DMUs. With this information, all four standard DEA models can be derived efficiently. The idea: was tested on 10,500 enlisted men in the E-8 and E-9 pay grade category in a DEA model ... |
|
| Thermoacoustics Review Meeting, 13-15 November 1996, Asilomar Conference Center, Pacific Grove, Ca |
APR 97 |
10 pages |
| Authors:
Henry E. Bass; Logan E. Hargrove; MISSISSIPPI UNIV UNIVERSITY
|
| The purpose of the Thermoacoustic Review Meeting (TARM) was to succinctly review the Office of Naval Research basic (6.1) work in the Thermoacoustic Cooling program and to hold a meeting for extended discussions and some related presentations. The participants included the ONR Thermoacoustic Cooling program Principal Investigators, colleagues, ONR Headquarters reviewers, and other invited appropriate Navy and other participants. Thermoacoustics, Thermoacoustic Cooling, Environment, Shipboard Cooling. |
|
| Instrumentation for Investigating Precursors to High Reynolds Number Unsteady Flow Separation on Pitching Airfoils |
10 SEP 96 |
52 pages |
| Authors:
Sumon K. Sinha; Dipankar Pal; Debjyoti Banerjee; Mukesh Pandey; Chuck Baker; MISSISSIPPI UNIV UNIVERSITY
|
| A pitching airfoil test facility has been developed to enable investigating the unsteady flow separation process on helicopter rotor blades under flow conditions which replicate the viscous-inviscid interactions. The facility is capable of operating at chord based Reynolds numbers of 106 and reduced frequencies of 0.23 while maintaining the Mach number below 0.15. A multi-element compliant wall sensor has been developed to measure pressure fluctuations just preceding the emption of ... |
|
| Seventh International Symposium on Long Range Sound Propagation, 24-26 JULY 1996 |
96 |
|
| Authors:
Henry E. Bass; MISSISSIPPI UNIV UNIVERSITY
|
 | As with previous Symposia, the purpose of the meeting was to exchange information on current research, identify areas needing additional work, and coordinate activities as much as possible. Attendees at the meeting included representatives from most groups with active research programs in the area of atmospheric sound propagation. The meeting was divided into seven short Sessions: sound propagation in the atmosphere, diffraction and ground effects, meteorology, non linear propagation, computational ... |
|
| Proceedings of the International Symposium on Long-Range Sound Propagation (6th) Held in Ottawa, Canada on 12-14 June 1994 |
DEC 94 |
526 pages |
| Authors:
Henry E. Bass; MISSISSIPPI UNIV UNIVERSITY
|
| Papers presented at the Sixth International Symposium on Long-Range Sound Propagation, 12-14 June 1994, at Chateau Laurier Hotel, Ottawa, Canada. |
|
| Race and the Military Justice System: Design for a Program of Action Research |
30 SEP 94 |
32 pages |
| Authors:
Dan Landis; Mickey R. Dansby; MISSISSIPPI UNIV UNIVERSITY
|
| In this paper, we build on the work of Dansby and Knouse, reviewing their work and that of others in an attempt to understand the process of military delinquency. In so doing, we review the major theories of delinquency, relate those theories to the military situation, and then outline a series of studies designed to illuminate the possible existence of racial disparities in the UCMJ system. These studies focus on, ... |
|
| Legal and Institutional Constraints on Aquaculture in Dredged Material Containment Areas |
APR 93 |
204 pages |
| Authors:
Sylvia Robertshaw; Donald Love; Richard J. McLaughlin; MISSISSIPPI UNIV UNIVERSITY
|
| High land and construction costs hinder development of pond-based aquaculture in the United States. A partnership with the U.S. Army Corps of Engineers may reduce these constraints. The dredged material containment areas (DMCAs) operated by the Corps are structurally similar to aquaculture ponds and typically are used only once every 3-10 years. With the Corps and navigational interests contributing to dike construction and land acquisition, the costs of aquaculture may ... |
|
| Fundamental Studies on Hydrology, Hydraulics and Geometry of River Networks |
JAN 90 |
6 pages |
| Authors:
V. K. Gupta; Ed Waymire; MISSISSIPPI UNIV UNIVERSITY
|
| Research was directed toward a mathematical understanding of the empirical main channel length-area relationship for river networks based on the two postulates of the random model. The most significant analytical finding was that, up to a scale factor, the average main channel length L varies as the square root of the network magnitude where mu, as the scale factor, denotes the mean link length. Keywords: River networks, Hydrology, Hydraulics, Earth ... |
|
| Fundamental Studies on Basin Scale Hydrology |
OCT 88 |
9 pages |
| Authors:
V. K. Gupta; Ed Waymire; MISSISSIPPI UNIV UNIVERSITY
|
| This entire research effort was built on two mathematical themes which are necessary for a fundamental theoretical understanding of climate- hydrology-geomorphology interactions and for solving the practical problem of predictions from ungaged basins. These themes included (i) and ensemble view or a probabilistic framework, and (ii) self-similarity and scaling in space and/or time. This final report describes the main findings and progress separately under each objective. Keywords: Hydrology; Basin scale ... |
|
| PC Program Evaluates Higher Order Modes in Shielded Dielectric Resonators. |
MAY 1988 |
|
| Authors:
D. Kajfez; MISSISSIPPI UNIV UNIVERSITY
|
|
| An Analytical and Experimental Investigation of Planar Discontinuities in Coaxial Waveguides |
MAR 1981 |
|
| Authors:
Michael G. Harrison; Chalmers M. Butler; MISSISSIPPI UNIV UNIVERSITY
|
| An integral equation approach has been developed for treating a large class of planar discontinuities in coaxial waveguides. The technique can effectively treat single and multiple discontinuities with no constraints on frequency or relative location. The integral equations are formulated with the transverse component of electric field in the aperture of each discontinuity as the unknown quantity. A numerical solution procedure is described which allows a choice of both the ... |
|
| Electromagnetic Scattering by Surface of Arbitrary Shape. |
MAR 1980 |
|
| Authors:
Donald R. Wilton; S. S. M. Rao; Allen W. Glisson; MISSISSIPPI UNIV UNIVERSITY
|
| The electric field integral equation (EFIE) is used with the moment to develop a simple and efficient numerical procedure for treating problems of scattering by arbitrarily-shaped objects. The objects are modeled for numerical purposes by planar triangular surface patch models. Because the EFIE formulation is used, the procedure is applicable to both open and closed bodies. Crucial to the formulation is development of a set of special subdomain basis functions ... |
|
| Numerical Computation of Electromagnetic Scattering by Inhomogeneous Penetrable Bodies. |
JUL 1979 |
208 pages |
| Authors:
S. Govind; D. R. Wilton; MISSISSIPPI UNIV UNIVERSITY
|
| Different approaches for studying scattering by inhomogeneous dielectric bodies are considered. The unimoment method, a differential equation approach, and the integral equation approach are discussed in detail. The integral equation approach with unknown equivalent surface currents is selected for further study. For this formulation layered inhomogeneities result in an overall system matrix which is block-tridiagonal, the solution of which can be obtained through an iterative procedure. Such an iterative procedure ... |
|
| Simple and Efficient Numerical Techniques for Treating Bodies of Revolution. |
MAR 1979 |
137 pages |
| Authors:
A. W. Glisson; D. R. Wilton; MISSISSIPPI UNIV UNIVERSITY
|
| Integral equations are derived and a numerical procedure is developed to treat scattering by bodies of revolution. Both dielectric and metallic scatterers are considered and the metallic scatterers may be either open or closed. The program is validated by comparing to spheres and finite cylinders for the dielectric case. In the conducting case, a cone-spheres and an open-ended cylinder are treated. It is found that the problem of instability noted ... |
|
| An Investigation of High Pressure Gaseous Injections into Liquid Propellants. |
01 MAY 1978 |
|
| Authors:
C. R. Wimberly; MISSISSIPPI UNIV UNIVERSITY
|
| It has been recognized for many years that liquid propellants (LP) offer several advantages over solid propellants when applied to guns. One of the concerns has been the repeatability of the pressure-time curves in the chamber, and occasional high pressure values that could exceed design limits of the casing. It is apparent that several variables may be involved and that the LP is extremely sensitive to small changes in conditions ... |
|
| Dynamic Analysis of a Loaded Conical Antenna over a Ground Plane. |
JUL 1977 |
|
| Authors:
Donald R. Wilton; MISSISSIPPI UNIV UNIVERSITY
|
| Three integral equations are derived and formulated for numerical solution for the currents induced on a resistively loaded conical antenna over a ground plane. The first integral equation is a relatively simple one for a cone without a topcap. The second and third integral equations are applicable to a cone with or without a topcap, but the latter equation is relatively cumbersome, involving complicated kernels with various singularities. A computer ... |
|
| Static Analysis of Conical Antenna over a Ground Plane. |
JUN 1977 |
|
| Authors:
Donald R. Wilton; MISSISSIPPI UNIV UNIVERSITY
|
| A static integral equation for the charge distribution on a cone over a conducting ground plane is developed. Numerical results are presented for the charge distribution, capacitance, and effective height of cones both with and without a topcap. (Author) |
|
| Study of Sound Propagation in Air. |
JUN 1976 |
11 pages |
| Authors:
Henry E. Bass; MISSISSIPPI UNIV UNIVERSITY
|
| This report summarizes research on sound absorption performed over a three-year period. This research included measurements of the rotational relaxation time in air at elevated temperatures and measurements of the vibrational relaxation of water vapor during collisions with water vapor, oxygen, nitrogen, and argon. As a result of these measurements the range of temperatures over which these basic physical properties can be accurately predicted over the temperature range normally encountered ... |
|
| Training Dogs for Explosives Detection |
OCT 1971 |
52 pages |
| Authors:
Ray C. Phillips; MISSISSIPPI UNIV UNIVERSITY
|
| A feasibility study was undertaken to determine whether dogs can be trained to discriminate the odor of commercial dynamite (straight nitroglycerin dynamite and ammonium nitrate dynamite), black powder and the plastic explosives, C3 and C4. Initial discrimination training established hexachloroethane as a practical surrogate odor. Transfer to the various explosives proved relatively easy. Search behavior, both on- and off-leash appropriate for searching buildings, was developed. At the conclusion of the ... |
|
| Explosives Detecting Dogs. |
SEP 1971 |
11 pages |
| Authors:
Max Krauss; MISSISSIPPI UNIV UNIVERSITY
|
| A feasibility study was undertaken to determine whether dogs can be trained to discriminate the odors of commercial dynamite (straight nitroglycerin dynamite and ammonium nitrate dynamite), black powder and the plastic explosives, C3 and C4. Initial discrimination training established hexachloroethane as a practical surrogate odor. Transfer to the various explosives proved relatively easy. Search behavior, both on- and off-leash appropriate for searching buildings, was developed. At the conclusion of the ... |
|
| VIBRATIONAL RELAXATION IN CO2/D2O MIXTURES, |
15 AUG 1967 |
|
| Authors:
F. Douglas Shields; James Alton Burks; MISSISSIPPI UNIV UNIVERSITY
|
| Sound absorption and velocity measurements were made in carbon dioxide/heavy water mixtures at 300, 400, and 500K. The results show that D2O is from 1/3 to 1/5 as efficient as H2O in de-exciting the bending mode vibration of CO2 in a molecular collision. The collision efficiency of D2O for de-exciting CO2 decreases with temperature at an even greater rate than does that of H2O. The large difference between D2O and ... |
|
| MULTIPLE VIBRATIONAL RELAXATION IN GASEOUS SULFUR DIOXIDE. |
01 JUL 1966 |
|
| Authors:
F. D. Shields; MISSISSIPPI UNIV UNIVERSITY
|
| Sound absorption and velocity measurements have been made in pure SO2 and mixtures of 25 and 50% Ar with SO2 at room temperature, 400K and 500K. The results confirm earlier reports of a multiple relaxation process. The data has been fit witih both series and parallel relaxation curves and the temperature dependence of the individual relaxation times determined. The difficulty in distinguishing between the two process is discussed. (Author) |
|
| TRANSLATION TO VIBRATION TRANSITION PROBABILITIES IN CO2-H2 AND CO2-HE COLLITIONS. |
01 JUL 1965 |
|
| Authors:
James W. L. Lewis; F. Douglas Shields; MISSISSIPPI UNIV UNIVERSITY
|
| The probability of a collision transferring energy from translation to vibration generally increases with relative speeds with which the molecules collide. Measured transition probabilities, therefore, generally increase with temperature. Some years ago this expected temperature effect was observed to fail for CO2-H2O, CO2-H2 and CO2-He collisions. Widom and Bauer proposed an explanation for the first of these in terms of a chemical affinity between the CO2 and H2O molecules but ... |
|
| VIBRATIONAL RELAXATION IN CARBON DIOXIDE/WATER-VAPOR MIXTURES. |
1965 |
|
| Authors:
James W. L. Lewis; K. P. Lee; MISSISSIPPI UNIV UNIVERSITY
|
| Sound-absorption and -velocity measurements in carbon dioxide water-vapor mixtures were made over the temperature range 23-195C. The measurements were made using plane progressive waves inside a glass tube 1.73 cm in diameter. Values of the mixture relaxation time obtained from the data increase from 0.27X10 to the -8th power sec at 23C to 0.58X10 to the -8th power sec at 195C, displaying no minimum value as has been reported previously ... |
|
| A NUMERICAL SOLUTION FOR SOUND VELOCITY AND ABSORPTION IN CYLINDRICAL TUBES, |
22 SEP 1964 |
|
| Authors:
F. D. Shields; K. P. Lee; W. J. Wiley; MISSISSIPPI UNIV UNIVERSITY
|
| A numerical solution of the Kirchhoff equation for the propagation constant of longitudinal sound waves in infinitely long cylindrical tubes has been obtained. The solution, which avoids the wide tube approximations, shows that the percentage errors in the Helmholtz-Kirchhoff tubevelocity correction and tube-absorption are both roughly equal to the percentage the velocity correction is of the free-space velocity. (Author) |
|
| SPECTROPHOTOMETRIC AND NON-SPECTROPHOTOMETRIC STUDIES OF SOLUTIONS. |
MAY 1964 |
|
| Authors:
P. A. D. Demaine; MISSISSIPPI UNIV UNIVERSITY
|
| Summaries are given of researches in the following areas: cryoscopic studies; theoretical projects; spectral studies of systems containing phosphonitrilic chlorides; complex formation between aromatic hydrocarbons and some nitro compounds; solvent effects on charge-transfer complexes between 1,3,5 trinitrobenzene and aromatic hydrocarbons in different solvents; spectrophotometric study of interactions between iodine and aryl methyl sulfides in carbon tetrachloride; infrared spectral studies of complex formation; molecular interactions studied by means of precision dielectric ... |
|
| THE EFFECT OF LIGHT MOLECULES ON VIBRATIONAL RELAXATION IN OXYGEN. |
18 JUL 1963 |
|
| Authors:
F.D. Shields; K.P. Lee; MISSISSIPPI UNIV UNIVERSITY
|
| Sound absorption and velocity measurements have been made in O2 with added amounts of H2, D2 and He. The number of collisions, Z sub 10(AB), necessary to de-excite the first vibrational state of O2 has been calculated from the measured relacation times. These values are in general agreement with values reported by Parker; Holmes, Smith, and Tempest; and White and Millikan. When log Z sub 10 (AB) is plotted vs ... |
|
| A QUANTITATIVE SPECTROPHOTOMETRIC STUDY OF INTERACTIONS BETWEEN IODINE AND ARYL METHYL SULFIDES IN CARBON TETRACHLORIDE, |
1963 |
|
| Authors:
V. Ramakrishnan ; P. A. D. Demaine; MISSISSIPPI UNIV UNIVERSITY
|
| Mixtures of aryl methyl sulfides and iodine in carbon tetrachloride have two charge-transfer absorption bands with maxima located near 3050 A and between 3380 and 3525 A respectively. Computer analysis of spectrophotometric data for these systems at 20 and 45 C showed that (1) data collected between 3300 and 3600 A are con sistent with the simultaneous reversible forma tion of two isomeric one:one complexes between the sulfide and iodine, ... |
|
| DETERMINATION OF SPECTROSCOPIC AND THERMODYNAMIC CONSTANTS FOR A SYSTEM OF 1:1 AND 2:1 COMPLEX EQUILIBRIUM REACTIONS, |
1963 |
|
| Authors:
Neil B. Jurinski; MISSISSIPPI UNIV UNIVERSITY
|
| A method of determining the formation constants and the molar absorbancy indices of several complex systems is described. It is shown that observed variations in the apparent formation constant with wavelength or concentration (based on the assumption of only 1:1 interactions) may be attributable to consecutive or simultaneous formation of higher order complexes. (Author) |
|
| SOLVENT EFFECTS ON CHARGE-TRANSFER COMPLEXES. I. THE s-TRINITROBENZENE-NAPHTHALENE COMPLEX IN CARBON TETRACHLORIDE, n-HEPTANE, n-HEXANE, CYCLOHEXANE, CHLOROFORM, OR CARBON DISULFIDE, |
1962 |
|
| Authors:
C. C. Thompson Jr.; P. A. D. Demaine; MISSISSIPPI UNIV UNIVERSITY
|
| Formation consand absorptivities for the 1:1 s-trinitrobenzene-naphthalene complex in six inert solvents (CCl4, n-hexane, cyclohexane, n-heptane, CHCl3, or CS2) were calculated with spectrophotometric data collected at fifteen wavelengths between 3300 and 4000 A at 20 and 45 C. All data were processed with an IBM 1620 60 K computer. Absorptivities for the complex at the absorption maxima (near 3600A) at 20 C vary from 1294 (-22) for n-heptane to 1540 ... |
|
Reports by Corporate Author
