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The Magnitude Of Charge Effects On The Fluorescence Quenching Of Peptidyl Tryptophan By Iodide, James L. Danziger
The Magnitude Of Charge Effects On The Fluorescence Quenching Of Peptidyl Tryptophan By Iodide, James L. Danziger
Honors Theses
The magnitude of charge effects on the quenching of tryptophan containing peptides by Iodine is compared for those peptides containing a positvely charged tryptophan to those peptides containing a negatively or uncharged tryptophan.
The Development Of An Optical Ph Sensor Based On Fluorescence, Kimberley Ann Forbes
The Development Of An Optical Ph Sensor Based On Fluorescence, Kimberley Ann Forbes
Honors Theses
We are interested in developing optical pH sensors based on the fluorescence of an immobilized fluorophor confined on the end of a bifurcated fiber optic. Such optical pH sensors have several potential advantages: they should be inherently less sensitive to electrical noise than conventional pH electro1es, they require no reference electrode, and they make possible remote measurements. The fluorophors evaluated are bound electrostatically to an ion exchange membrane which is then attached to the common end of a bifurcated fiber optic, The fluorophor is excited through one arm and the fluorescence emission is passed through the other arm of the …
The Microstructure Determination Of Poly(B-Pinene), Kevin G. Perrigno
The Microstructure Determination Of Poly(B-Pinene), Kevin G. Perrigno
Honors Theses
The microstructure of poly(B-pinene) was determined through analysis of pyrolysis products.
The Preparation Of Cyclic Organic Carbonyl Compounds From Ƞ5-Cyclopentadienyltetracarbonylvanadium And Substituted Acetylenes, Ronald C. Newbold
The Preparation Of Cyclic Organic Carbonyl Compounds From Ƞ5-Cyclopentadienyltetracarbonylvanadium And Substituted Acetylenes, Ronald C. Newbold
Honors Theses
Studies on the reactivity of many transition metal carbonyl complexes with various acetylenes have generated significant interest in the field of organometallic chemistry, but little effort has been put forth to make use of these compounds as genuine organic reagents. Most metal carbonyl compounds generate both organic and organometallic products, where oxidative cleavage becomes necessary to obtain the organic moiety. (35-c5H5)v(CO)4 is an oxygen-sensitive carbonyl complex which has been shown to thermally react with bis-(pentafluorophenyl)acetylene to produce cyclic carbonyl compounds in high yield, particularly the quinone derivative, with few organometallic products. The thermal reactivity of (35-c5H5)v(CO)4 is characterized with various …
Synthesis And Spectral Studies Of Amides Of 9-Anthroic Acid, Juliana Rodgers
Synthesis And Spectral Studies Of Amides Of 9-Anthroic Acid, Juliana Rodgers
Honors Theses
The fluorescence energy, shape of the fluorescence spectrum, and the fluorescence efficiency of 9-anthramide (9-CONH2) and N,N-diethyl-9-anthramide (9-CONEt2) have been investigated as a function of solvent. For the 9-CONH2, the Sl energy decreases and the fluorescence spectra become structureless at the polar and nonpolar extremes of the solvent scale. This unusual solvent-dependent fluorescence behavior for 9-CONH2 is explained by a significant geometry change subsequent to excitation, whereby the exocyclic group rotates about the anthracene rings. In contrast, 9-CONEt2 shows solvent-independent behavior. The Sl energy generally remains constant and the fluorescence spectra show well-defined vibrational structure in a wide variety of …
Detection And Quantification Of Atmospheric Carbonyl Compounds, Peter Gerard Schulam
Detection And Quantification Of Atmospheric Carbonyl Compounds, Peter Gerard Schulam
Honors Theses
Ambient air aldehyde analysis was performed in Schenectady, NY. The Technique, as prescribed by Kuntz et. Al. (7), entailed the trapping of the volatile aldehydes as their 2,4-dinitrophenylhydrazone derivatives in an acetonitrile solution. The derivatives were then separated on a reversed phase HPLC column and detexted by UV absorption at 254 and 360 nm., simultaneously. The air in Schenectady was found to contain formaedehyde and acetaldehyde at concentrations which ranged from .70 to 30.5 ppb and below that of detection to 1.6 ppb, respectively. Formaldehyde's daily average in Schenectady was 7.6 ppb. The formaldehyde and acetaldehyde levels at Whiteface Mtn. …
Determination Of Aldehydes In Ambient Air By High Performance Liquid Chromatography With Fluorescence Detection, Carol B. Berman
Determination Of Aldehydes In Ambient Air By High Performance Liquid Chromatography With Fluorescence Detection, Carol B. Berman
Honors Theses
Two methods for the determination of aldehydes in ambient air were investigated. The methods involved derivatization of the aldehydes by 2-diphenylacetyl-1,3-indandione-1-hydrazone (DAIH) and 1-dimethylaminoaphthalene-5-sulfonylhydrazine (dansylhydrazine) in acetonitrile solution. The deriviatives were then separated by high performance liquid chromatography and detected and quantified by flourescence detection. The DAIH method was found to be unsuitable and was therefore abandoned. The dansyl hydrazine method was found to be a potentially uncomplicated, rapid, and senstitive procedure for the detection of aldehydes.
Conformational Energy Calculations On Valinomycin, Rachel J. Cohen
Conformational Energy Calculations On Valinomycin, Rachel J. Cohen
Honors Theses
The antibiotic action of the ionophore valinomycin is a result of its ability to preferentially bind potassium ions and transport them across cellular membranes. Complexation is solely due to the molecular structure of this cyclic depsipeptide. In solution, the molecule exists in different conformers depending upon solvent polarity. Exact knowledge as to the structure of valinomycin in the aqueous and lipid cellular layers is thus difficult to determine. Many spectral studies of valinomycin have been undertaken utilizing a variety of instrumental methods and conformations existing in different solvents have been proposed. We have performed energy minimization procedures on these structures. …