In order to couple high cellular uptake and target specificity of dendrimer molecule with excellent optical properties of semiconductor nanoparticles, the interaction of cysteine-capped CdTe quantum dots with dendrimer was investigated through spectroscopic techniques. NH(2)-terminated dendrimer molecule quenched the photoluminescence of CdTe quantum dots. The binding constants and binding capa...

Introduction: A key goal for infrared remote sensing studies of Mars is to determine which minerals are present and absent. Visible/infrared spectroscopy is the primary method for remote mineral identification. In order to understand the resulting interpretations, it is necessary to understand the sources of uncertainty. Here we detail the primary uncertainties in the method. Interpretations of...

Removal of the heme iron from cytochrome c to generate porphyrin cytochrome c relieves the quenching of porphyrin fluorescence and enhances the fluorescence of the single tryptophan residue and the 4 tyrosine residues. The intensity of the porphyrin fluorescence is not perturbed by denaturation of the protein at neutral pH using either urea or guanidine hydrochloride. However, the amplitude of ...

The synthesis and characterization of poly(1-methylinosinic acid) are described. Laser Raman spectra of poly (mII) were obtained as a function of temperature in D2O solution. Thermal melting profiles derived from the intensity variations of the 712, 795, 814, 986, 1333, 1509, 1550 and 1680 cm-1 bands indicate a cooperative melting temperature of 9 +/- 1 degree C. The low temperature form of pol...