The GTPase Ras p21 is a crucial switch in cellular signal transduction. FTIR spectra of the substrate guanosine triphosphate (GTP) show remarkable changes when it binds to the enzyme. The reduced band widths indicate that the flexible GTP molecule is guided by the protein into a preferred conformation. The delocalized phosphate vibrations of unbound GTP become localized. The frequency shifts sh...

MOPITT is a nadir-viewing gas correlation radiometer due to be launched aboard the EOS Terra platform. The feasibility of MOPITT data validation using ground-based sun-viewing spectrometers of moderate resolution is investigated. Several instruments with a spectral resolution of approximately 0.2 cm are now operating in Russia and in China for the monitoring of CO and CH4. A spectrometer of thi...

BACKGROUND Advance Technology Development (ATD) Program is a new program put forth by Department of Energy to develop high power lithium ion batteries for hybrid electric vehicles and electric vehicles. It is a joint effort of five national labs and LBNL is the lead lab in investigating SEI (solid electrolyte interface) layer formation and dissolution. Our group is responsible for the character...

The far–IR is a unique wavelength range for Astrophysical studies, however, it can only be fully sampled from space platforms. The fundamental rotational transitions of light molecules, the high–J transitions of polyatomic species, the bending modes of non-polar molecules, several atomic fine structure lines and many frequencies blocked by the earth atmosphere can only be observed between 50 an...

We describe an optimized setup for two-dimensional (2D) IR spectroscopy, which can be implemented at low additional cost and with standard optics in any laboratory equipped for femtosecond mid-IR spectroscopy. An interferometer produces a pair of intense pump pulses, whose interferogram is simultaneously recorded and directly yields the relative phase needed for the calculation of absorptive 2D...

We present a green and scalable route toward the formation of reduced graphene oxide (r-GO) by photothermal reduction induced by infrared (IR) irradiation, utilizing a bathroom IR lamp as the source of IR light. Thermogravimetric analysis, Raman, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy confirm the reduction of r-GO by IR light. Ultraviolet-visible-infrared s...

Using the VLT together with the near infrared instrument ISAAC, we have obtained medium spectral and high spatial resolution observations of a sample of nearby Seyfert galaxies in the H-band. This band is particularly suited for stellar population studies since the stellar component dominates over the AGN nucleus. The H-band also includes the peak contribution from cool stars. The AGN spectra a...

Polypyrrole nanoparticles were synthesized by chemical polymerization method using ammonium persulphate as an oxidant. The synthesized polypyrrole nanoparticles were characterized by FT-IR, UV-Visible, FESEM and CV. The structure of polypyrrole nanoparticles were confirmed by FT-IR spectroscopy. The UV-Vis spectra of polypyrrole nanoparticles show π-π* and n-π* transitions. The morphological pr...

The utility of infrared (IR) spectroscopy for the determination of strawberry ripeness has been successfully demonstrated. Transmission IR spectra were collected using dried liquid extracts from strawberry flesh. The overall IR feature provided fairly noticeable differences, and the ripeness stage was clearly identified using principal component analysis (PCA). Although all of the extracted com...

polyaniline and polyamide (nylon 6,6) nanocomposites with silva were prepared by in-situ oxidativepolymerization of aniline monomers in the presence of ag salt nano particles of silver (nps) were symthesieedby controlled reduction of ag+ ions kith sodium borohydride at room temperature. nylon 6,6 wax loaded withag nanoparfieles by erdrapment of ag+ ions into the polymer network, followed by red...