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Articles 1 - 30 of 32
Full-Text Articles in Entire DC Network
Professor Zbigniew Jaworowski – In Memoriam, Ludwik Dobrzyn´Ski, Michael P.R. Waligórski, Marek K. Janiak
Professor Zbigniew Jaworowski – In Memoriam, Ludwik Dobrzyn´Ski, Michael P.R. Waligórski, Marek K. Janiak
Dose-Response: An International Journal
No abstract provided.
Investigating The Prediction Of High Resolution Heat Waves And Extreme Precipitation And The Impact Of Heat Waves On Air Quality In U.S. In The 21st Century, Yang Gao
Doctoral Dissertations
In this study, the perennial problem of scale is addressed with an updated set of modeling tools that include global climate, atmospheric chemistry simulation, mesoscale weather, and air quality simulations. The evaluation of coupled model performance across geographic scales and the assessment of local scale climate change impacts under a fossil fuel intensive climate change scenario Representative Concentration Pathway (RCP 8.5) was achieved by linking the global climate model Community Earth System Model (CESM), with the regional climate model Weather Research and Forecasting (WRF) Model. This study is the first evaluation of dynamical downscaling using WRF on a 4km by …
Mole Street Journal, November 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, November 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Ab Initio Quantum Chemical Studies On Neutral-Radical Reactions Of Ethynyl (C2h) And Cyano (Cn) With Unsaturated Hydrocarbons, Adeel Jamal
FIU Electronic Theses and Dissertations
An Ab Initio/RRKM study of the reaction mechanism and product branching ratios of neutral-radical ethynyl (C2H) and cyano (CN) radical species with unsaturated hydrocarbons is performed. The reactions studied apply to cold conditions such as planetary atmospheres including Titan, the Interstellar Medium (ISM), icy bodies and molecular clouds. The reactions of C2H and CN additions to gaseous unsaturated hydrocarbons are an active area of study. NASA’s Cassini/Huygens mission found a high concentration of C2H and CN from photolysis of ethyne (C2H2) and hydrogen cyanide (HCN), respectively, in the organic …
Mole Street Journal, October 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, October 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Mole Street Journal, September 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, September 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
A Study Of Data Mining Trend Through The Optimized Bibliometric Methodology Based On Sci Database From 1993 To 2011, Lu Dai, Lixin Ding, Yunwen Lei, Yangge Tian
A Study Of Data Mining Trend Through The Optimized Bibliometric Methodology Based On Sci Database From 1993 To 2011, Lu Dai, Lixin Ding, Yunwen Lei, Yangge Tian
Applied Mathematics & Information Sciences
An optimized bibliometric method was applied in this work to evaluate global scientific production of data mining papers of the Science Citation Index (SCI). In compared with traditional bibliometric keyword analysis, a semantic words class was established by applying the text extraction mode to remove noise in the abstract and combining with the core relative phrases retrieved from keywords to get the sample for further experiment. The analysis shows a high correlation between title and keywords, and the title reports less information than keywords does. Also, keywords provide more positive guidance to know and be familiar with the status and …
Mole Street Journal, August 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, August 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Mole Street Journal, July 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, July 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Mole Street Journal, June 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, June 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Mole Street Journal, May 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, May 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Dynamic Gene Expression In The Human Cerebral Cortex Distinguishes Children From Adults, Kirstin N. Sterner, Amy Weckle, Harry T. Chugani, Adi L. Tarca, Chet C. Sherwood, Patrick R. Hof, Christopher W. Kuzawa, Amy M. Boddy, Asad Abbas, Ryan L. Raaum, Lucie Grégoire, Leonard Lipovich, Lawrence I. Grossman, Monica Uddin, Morris Goodman, Derek E. Wildman
Dynamic Gene Expression In The Human Cerebral Cortex Distinguishes Children From Adults, Kirstin N. Sterner, Amy Weckle, Harry T. Chugani, Adi L. Tarca, Chet C. Sherwood, Patrick R. Hof, Christopher W. Kuzawa, Amy M. Boddy, Asad Abbas, Ryan L. Raaum, Lucie Grégoire, Leonard Lipovich, Lawrence I. Grossman, Monica Uddin, Morris Goodman, Derek E. Wildman
Publications and Research
In comparison with other primate species, humans have an extended juvenile period during which the brain is more plastic. In the current study we sought to examine gene expression in the cerebral cortex during development in the context of this adaptive plasticity. We introduce an approach designed to discriminate genes with variable as opposed to uniform patterns of gene expression and found that greater inter-individual variance is observed among children than among adults. For the 337 transcripts that show this pattern, we found a significant overrepresentation of genes annotated to the immune system process (pFDR>0). Moreover, genes known to …
Mole Street Journal, April 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, April 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Synthesis Of Novel Alkaline Earth Tosylate Complexes Through Donor Studies, Adam J. Brooks
Synthesis Of Novel Alkaline Earth Tosylate Complexes Through Donor Studies, Adam J. Brooks
Honors Capstone Projects - All
Salt metathesis has become a critical reaction pathway in organometallic chemistry; however, for alkaline earth metals this process is hindered by the need of highly pure and expensive metal iodides as starting materials. This contribution highlights recent attempts to identify inexpensive reagents for salt metathesis. Alkaline earth-tosylates can be prepared cost effectively using p-toluenesulfonic acid in one-pot reactions in water. The coordinated water molecules can be removed by gentle heating under vacuum. The anhydrous tosylates, however, have major solubility limitations as the result of extensive aggregation networks. The goal of this study was to increase the solubility of the tosylates …
Mole Street Journal, March 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, March 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Nongenomic Mechanisms Of Pten Regulation, Jimmie E. Fata, Shawon Debnath, Edmund C. Jenkins, Marcia V. Fournier
Nongenomic Mechanisms Of Pten Regulation, Jimmie E. Fata, Shawon Debnath, Edmund C. Jenkins, Marcia V. Fournier
Publications and Research
A large amount of data supports the view that PTEN is a bona fide tumor suppressor gene. However, recent evidence suggests that derailment of cellular localization and expression levels of functional nonmutated PTEN is a determining force in inducing abnormal cellular and tissue outcomes. As the cellular mechanisms that regulate normal PTEN enzymatic activity resolve, it is evident that deregulation of these mechanisms can alter cellular processes and tissue architecture and ultimately lead to oncogenic transformation. Here we discuss PTEN ubiquitination, PTEN complex formation with components of the adherens junction, PTEN nuclear localization, and microRNA regulation of PTEN as essential …
Mole Street Journal, February 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, February 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Mole Street Journal, January 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, January 2012, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Rate And Apparent Quantum Yield Of Photodissolution, Meg Estapa, Lawrence M. Mayer, Emmanuel Boss
Rate And Apparent Quantum Yield Of Photodissolution, Meg Estapa, Lawrence M. Mayer, Emmanuel Boss
Geosciences
We quantified rates of photochemical dissolution (photodissolution) of organic carbon in coastal Louisiana suspended sediments, conducting experiments under well-defined conditions of irradiance and temperature. Optical properties of the suspended sediments were characterized and used in a radiative transfer model to compute irradiances within turbid suspensions. Photodissolution rate increased with temperature (T), with activation energy of 32 ± 7 kJ mol−1, which implicates indirect (non-photochemical) steps in the net reaction. In most samples, dissolved organic carbon (DOC) concentration increased approximately linearly with time over the first 4 h of irradiation under broadband simulated sunlight, after higher rates in the initial hour …
Impact Of Anthropogenic Emission On Air Quality Over A Megacity – Revealed From An Intensive Atmospheric Campaign During The Chinese Spring Festival, K Huang, G Zhuang, Y Lin, Q Wang, Joshua S. Fu, R Zhang, J Li, C Deng, Q Fu
Impact Of Anthropogenic Emission On Air Quality Over A Megacity – Revealed From An Intensive Atmospheric Campaign During The Chinese Spring Festival, K Huang, G Zhuang, Y Lin, Q Wang, Joshua S. Fu, R Zhang, J Li, C Deng, Q Fu
Faculty Publications and Other Works -- Civil & Environmental Engineering
The Chinese Spring Festival is one of the most important traditional festivals in China. The peak transport in the Spring Festival season (spring travel rush) provides a unique opportunity for investigating the impact of human activity on air quality in the Chinese megacities. Emission sources are varied and fluctuate greatly before, during and after the Festival. Increased vehicular emissions during the "spring travel rush" before the 2009 Festival resulted in high level pollutants of NOx (270 μg m−3), CO (2572 μg m−3), black carbon (BC) (8.5 μg m−3) and extremely low single scattering …
Typical Types And Formation Mechanisms Of Haze In An Eastern Asia Megacity, Shanghai, K Huang, G Zhuang, Joshua S. Fu, Q Wang, T Liu, R Zhang, Y Jiang, C Deng, Q Fu, N C. Hsu, B Cao
Typical Types And Formation Mechanisms Of Haze In An Eastern Asia Megacity, Shanghai, K Huang, G Zhuang, Joshua S. Fu, Q Wang, T Liu, R Zhang, Y Jiang, C Deng, Q Fu, N C. Hsu, B Cao
Faculty Publications and Other Works -- Civil & Environmental Engineering
An intensive aerosol and gases campaign was performed at Shanghai in the Yangtze River Delta region over Eastern China from late March to early June 2009. This study provided a complementary picture of typical haze types and the formation mechanisms in megacities over China by using a synergy of ground-based monitoring, satellite and lidar observations. During the whole study period, several extreme low visibility periods were observed with distinct characteristics, and three typical haze types were identified, i.e. secondary inorganic pollution, dust, and biomass burning. Sulfate, nitrate and ammonium accounted for a major part of PM2.5 mass during the …
Mole Street Journal, December 2011, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal, December 2011, University Of Arkansas, Fayetteville. Dept. Of Chemistry And Biochemistry
Mole Street Journal
No abstract provided.
Boesenbergia Rotunda: From Ethnomedicine To Drug Discovery, Norzulaani Khalid
Boesenbergia Rotunda: From Ethnomedicine To Drug Discovery, Norzulaani Khalid
Norzulaani Khalid
Boesenbergia rotunda is a herb from the Boesenbergia genera under the Zingiberaceae family. B. rotunda is widely found in Asian countries where it is commonly used as a food ingredient and in ethnomedicinal preparations. The popularity of its ethnomedicinal usage has drawn the attention of scientists worldwide to further investigate its medicinal properties. Advancement in drug design and discovery research has led to the development of synthetic drugs from B. rotunda metabolites via bioinformatics and medicinal chemistry studies. Furthermore, with the advent of genomics, transcriptomics, proteomics, and metabolomics, new insights on the biosynthetic pathways of B. rotunda metabolites can be …
Geochemistry & Mineralogy Of Fluvial Sediments In The Southern Alps, New Zealand, Emma Marie Kiekebosch‐Fitt
Geochemistry & Mineralogy Of Fluvial Sediments In The Southern Alps, New Zealand, Emma Marie Kiekebosch‐Fitt
Science, Medicine & Health - Honours Theses
Silicate weathering acts as a global sink for the greenhouse gas carbon dioxide. In order to understand long‐term climate change and the fluctuations in atmospheric carbon dioxide, it is paramount to investigate the regulators of chemical weathering. The controls of rainfall and uplift have been reported to either enhance or inhibit the extent of chemical weathering, and therefore their relationship is still being highly debated in literature. Investigation of this relationship in the Southern Alps of New Zealand has been modest in comparison to the Himalayas. These studies have either focused on solute geochemistry of rivers, and therefore do not …
Practical Objectivity: Keeping Natural Science Natural, Alan G. Padgett
Practical Objectivity: Keeping Natural Science Natural, Alan G. Padgett
Faculty Publications
No abstract provided.
Structured Dna Probe Microarrays For Detection Of Acetotrophic Methanogens In Complex Solutions, Jonas Boateng
Structured Dna Probe Microarrays For Detection Of Acetotrophic Methanogens In Complex Solutions, Jonas Boateng
Dissertations
No abstract provided.
Constraints On Instantaneous Ozone Production Rates And Regimes During Domino Derived Using In-Situ Oh Reactivity Measurements, V Sinha, J Williams, J M. Diesch, F Drewnick, M Martinez, H Harder, E Regelin, Dagmar Kubistin, H Bozem, Z Hosaynali-Beygi, H Fischer, M D. Andres-Hernandez, D Kartal, J A. Adame, J Lelieveld
Constraints On Instantaneous Ozone Production Rates And Regimes During Domino Derived Using In-Situ Oh Reactivity Measurements, V Sinha, J Williams, J M. Diesch, F Drewnick, M Martinez, H Harder, E Regelin, Dagmar Kubistin, H Bozem, Z Hosaynali-Beygi, H Fischer, M D. Andres-Hernandez, D Kartal, J A. Adame, J Lelieveld
Faculty of Science, Medicine and Health - Papers: part A
In this study air masses are characterized in terms of their total OH reactivity which is a robust measure of the "reactive air pollutant loading". The measurements were performed during the DOMINO campaign (Diel Oxidant Mechanisms In relation to Nitrogen Oxides) held from 21/11/2008 to 08/12/2008 at the Atmospheric Sounding Station - El Arenosillo (37.1° N-6.7° W, 40 m a.s.l.). The site was frequently impacted by marine air masses (arriving at the site from the southerly sector) and air masses from the cities of Huelva (located NW of the site), Seville and Madrid (located NNE of the site). OH reactivity …
Design And Synthesis Of Novel Discotic Liquid Crystals , Himadri Sekhar Kayal
Design And Synthesis Of Novel Discotic Liquid Crystals , Himadri Sekhar Kayal
Electronic Theses and Dissertations
Columnar mesophases of discotic liquid crystals (DLCs) have attracted much attention as organic semiconductors and have been tested as active materials in light-emitting diodes, photovoltaic solar cells, and field-effect transistors. However, devices based on DLCs have shown lower performance than devices based on polymeric and small molecule glass semiconductors, despite their superior charge conducting and advantages self-organizing properties. Most DLCs also require relatively complex processing conditions for the preparation of electronic devices, which is another significant disadvantage. Consequently, new types of DLCs are sought-after to overcome these limitations and described in this thesis are new types of discotic materials and …
Evaluation Of A Wide Rim Phosphorylated Calix[4]Arene's Properties As A Sensory Molecule In An Er(Iii)-Pvc Membrane Sensor, Abbas Ali Zamani, Massoumeh Parinejad, Fataneh Jamali, Mohammad Reza Yaftian, Dominique Matt
Evaluation Of A Wide Rim Phosphorylated Calix[4]Arene's Properties As A Sensory Molecule In An Er(Iii)-Pvc Membrane Sensor, Abbas Ali Zamani, Massoumeh Parinejad, Fataneh Jamali, Mohammad Reza Yaftian, Dominique Matt
Turkish Journal of Chemistry
This study concerns the evaluation of ionophoric properties of a functionalized calix[4]arene, named 5,17-bis(diphenylphosphinoyl)- 25,26,27,28-tetrapropoxycalix[4]arene (Calix), by its application as a sensing material in an erbium(III)-PVC membrane potentiometric sensor. A membrane formed by 30% PVC, 65% dioctyl phthalate (DOP) as plasticizing solvent mediator, 2% sodium tetraphenyl borate (NaTPB) as ion excluder, and 3% of Calix as ionophore shows the best performance of the sensor. The prepared sensor presents a nearly Nernstian response (a slope of 20.0 \pm 0.5 mV/decade) over a concentration range of 1 \times 10^{-7}--1 \times 10^{-3} M of erbium ions, with a limit of detection of 3.8 …
Studies Directed To The Development Of Long Lived Palladium Membranes For Hydrogen Purification, William Glenn Pinson
Studies Directed To The Development Of Long Lived Palladium Membranes For Hydrogen Purification, William Glenn Pinson
Graduate Student Theses, Dissertations, & Professional Papers
The focus of this study was to systematically investigate the variables involved in electroless deposition of palladium and palladium alloy membranes on a known porous stainless steel substrate, and apply the results to a new and novel porous stainless steel substrate. Different oxide pore and surface treatments were studied. The effect of silica as a diffusion barrier, surface pore modifier, and palladium nucleation site was examined. Silica sol-gel coating treated stainless steel substrates were explored. Several different formulas of sol-gel coatings and their impact on palladium and palladium copper deposition were researched. The roles of sintering and annealing and their …