Seminar Speakers 2012 - Chemistry Department
Department Seminar Speakers
- Dr. Deb N. Chakravarti (York College, CUNY)
- November 14, 2012
- Title: "Pharmaceutical Sciences at York College: What Every Student Should Know"
- Abstract: Dr. Chakravarti provided the necessary information, both academic and professional, on the newly established degree on Pharmaceutical Sciences with York College. A list of professional, post-graduate opportunities was presented.
- Dr. Thomas A. Kubic (John Jay College and the Graduate Center, CUNY)
- October 19, 2012
- Title: "Some Interesting Cases I Have Worked Involving Transfer Evidence"
- Abstract: This lecture will deal with a number of criminalistics cases that involve transfer evidence of the micro and ultra micro size classes. These are oft called “trace evidence” even if of substantial size. The talk will concentrate of the application of light and electron microscopy and x-ray as well as vibrational spectrometry to the comparison of physical evidence. Event reconstruction will be discussed and examples of both successful prosecutions and exonerations will be presented. Dr. Kubic will be happy to discuss the theory of the instruments he employed if the audience desires. Interested students might wish to web search the Napoleon Cardenas case for additional information concerning an example of exoneration employing physical evidence.
- Dr. Paul J. Sideris (QCC)
- September 28, 2012
- Title: "Solid State Nuclear Magnetic Resonance (NMR) Spectroscopy of Anion-Exchangers and Battery-Related Materials"
- Abstract: The ability of NMR spectroscopy to obtain element-specific structural information at the local level, in addition to its sensitivity to motion occurring over a wide timescale, has provided unprecedented insight into the structure and dynamics of complex materials. Technological advancement ultimately resides in the fundamental understanding of the structural, chemical, and electronic changes of the various components of devices. Progress in two classes of materials will be outlined – those for environmental remediation of waste water, and those concerning energy conversion or storage. Several studies will be presented on a myriad of systems - layered double hydroxides (LDHs), nano-lithium titanium oxide, polymer electrolytes, electrolyte additives, bismuth fluorides, LiMPO4 (M = Fe, Co, Ni, Mn), iodine-doped pentacene for photovoltaics – where solid state NMR has refined structural models and elucidated local chemistry.
- Dr. Guofang Chen (St. John's University)
- April 20, 2012
- Title: "Stimuli-responsive Polymeric Fragmentated Nanotubes for the Controlled Drug Delivery in Cancer Treatment"
- Abstract: An important prerequisite for the successful controlled drug delivery system is the ability to transport enough drug molecules with “zero release” to the targeted site where they can then be released in a controlled manner. To that end, novel stimuli-responsive nanotubes were prepared by surface-initiated photopolymerization in cylindrical alumina nanopores followed by sonication-induced scission. Such a nanotube-based drug delivery system is able to (1) enhance drug loading capacity; (2) site-specifically transport to the targeted cells; (3) facilitate cellular internalization and intracellular trafficking; and (4) sustain drug release on command.
- Dr. John Schmermund (QCC)
- March 30, 2012
- Title: "Chromatographic Methods in the Investigation of the Radiolysis of Crude Oil by High Energy Electrons"
- Abstract: Heavy crude is located in deposits of bituminous sand found in many countries throughout the world, but in extremely large quantities in Canada (Athabasca oil sands). Traditional processing methods are difficult to apply since the viscosity is greater than 104 centipoise. Therefore, an alternative technique using e-beam radiation was investigated to produce low boiling fractions suitable for aviation, automotive and heating oil products.
The analyses of the complex mixture of hydrocarbons produced from the irradiation were essential to understanding the mechanism of the radiolysis. An automated capillary GC method was developed with special instrumentation designed to process the large number of samples. The analytical system was a simulation of the thermal distillation process traditionally used in the industrial production of distillates.
The presentation will focus on the development of the analytical procedures and automation of data analysis.
- Dr. Angelique Corthals (John Jay College)
- March 14, 2012
- Title: "Mummies: Gone but not departed - The wonderful world of Forensic Anthropology"
- Abstract: The study of ancient civilizations has fascinated archeologists and the public for centuries. The focus of the majority of studies to date has been on material and cultural records, rather than on the historical ecology of diseases and biology. Forensic anthropology is a fairly new discipline which attempts to extract key information from ancient remains by using historical, medical, anthropological, forensic and genetic techniques and methodology. Specifically, tissues are screened for either pathogen DNA (such as tuberculosis, malaria) or human DNA to determine loci of infection or lineages. Combined with ancient textual sources, paleoclimate and paleodemography studies, forensic anthropology helps to generate GIS-based spatio-temporal modelling of disease transmission or population migration patterns. By combining multiple sources of evidence, often confined to separate disciplines, forensic anthropology advances our understanding of ancient civilizations in a time of widespread environmental change, including climate fluctuations. This talk will be specifically about diseases, landscapes and climate change in ancient Egypt, as well as on the search for queen Hatshepsut's lost mummy.
- Dr. Julie Pigza (QCC)
- February 24, 2012
- Title: "Methodology Development using Oxyallyl Silanes as Homoenolate Equivalents"
- Abstract: The development of new methodology is proposed in which oxyallyl silanes will act as homoenolate equivalents in the addition to various electrophiles. Unlike standard allylation, oxyallyl silane addition furnishes an olefin with an increased oxidation state as a vinyl ether functional group. This precludes the use of traditional methods for functionalization of an alkene such as hydroboration-oxidation which can be difficult when the compound contains a nitrogen or when the olefin is near a sterically hindered position. The electrophiles of interest include vinylogous amides and phenols and are generated in the presence of an oxidant. The products of oxyallyl silane addition can then be converted to small ring systems found within natural products that are of interest to the synthetic community and are often biologically active. The synthesis of oxyallyl silanes will be discussed as well as some initial findings in the addition to electrophiles.