Analyses of the absorption bands of uranyl acetate and nitrate were carried out utilizing the results obtained from the polarization characteristics in the absorption spectra of single crystals in different directions at liquid air temperature. (auth)
Energy Citations Database
The IR absorption spectra of intact cells of 28 strains of white and golden staphylococci differing in biological activity were studied to determine the possibility of using IR spectroscopy for interspecific differentiation of the staphylococci. The vario...
National Technical Information Service (NTIS)
The research on the technology of infrared absorption spectrum and its application plays an important role in the development of technology of optical measurement. The analysis technology of blood infrared absorption spectrum is presented in the present paper. By comparison between and analyzing the infrared absorption ...
PubMed
spectrum of a sample with two absorption bands. Raman spectra are shown that are excited at a wave- length from resonance Raman spec- troscopy. The absorption spectrum is shown for a sample with two absorption different analytes in the sam- ple, we selectively enhance the vibrational Raman ...
E-print Network
A procedure described by Bykov and Hien was employed to obtain an approximation formula for the line broadening expected in a Mossbauer experiment for the case where the emission and absorption spectra have Gaussian shapes. For identical emission and absorption spectra, the broadening as given by this ...
We measured infrared and visible light absorption spectra and EXAFS for Ag-Au core/shell particles. The shell thickness and core diameter can be evaluated from the EXAFS results, which are almost consistent with those obtained using TEM. The influence of a thinner shell only slightly appeared in the visible absorption ...
NASA Astrophysics Data System (ADS)
Research at Argonne has found that small clusters of certain transition metal atoms display optical absorption spectra that are fundamentally different from those typically observed for other small molecules. A new laser technique known as photodissociati...
... trends similar to those from EEMs. For example, absorption spectra from attached leaves were different from absorption spectra from fallen leaves during low-water and ... ...
NBII National Biological Information Infrastructure
The results of calculations of optical absorption spectra of silicon containing Ge nanoclusters of spherical shape and different size are reported. The optical transitions from the Ge cluster levels to the silicon bulk energy band states are analyzed.
The FTIR spectra of cellulose nitrates with differing ester contents show that in the region of the nitrate ester absorption (approx.1650 cm sup -1 ) the changes in the shape of the absorption band are correlated with the changes in the concentration of C...
It is seen from the survey that the oxygen and nitrogen absorption spectra have been studied most; however, there is no complete consistency among the results of different authors in the whole vacuum region of the spectrum even for them; thus, a majority ...
Excited-state absorption arising from transitions between singly and doubly excited exciton components in strongly coupled photosynthetic antennae profoundly influences the absorption difference spectra observed in pump-probe spectroscopy. Model calculations of the absorption ...
The infrared absorption spectra of the molecules C2H2Cl2, cis C2H2Cl2, trans C2H2Cl2, C2HCl3, C2Cl4 are studied in the region between 2 and 25?. The difference of the spectra of the two symmetric isomers is shown. An attempt is made to analyze the absorption bands observed together with the ...
The spectral properties of Bowman-Birk soybean trypsin inhibitor (BBI) were investigated by analyzing difference absorption spectra and difference circular dichroism (CD) spectra and by comparing them with those of tyrosyl model compounds. The O-acetylati...
This paper presents results of the photoacoustic (PA) spectral studies, of a series of silicon samples with differently prepared surfaces, in two PA experimental configurations, so-called, absorption and transmission ones. The PA amplitude spectra of the samples indicated existence of the damaged surface layers. In the paper, the two ...
The absorption spectra of UCl/sub 4/ in 1M HCl, 12M HCl, methanol, ethanol, isopropanol, tetrahydrofuran (TRF) and tni-n-butyl phosphate (TBP) exhibit wide variations in the intensity and location of major absorption bands. The spectra are qualitatively interpreted as the result of activation of ...
... Accession Number : ADD750471. Title : THE UV ABSORPTION SPECTRA OF CHEMICAL AGENTS AND SIMULANTS. ...
DTIC Science & Technology
... Descriptors : (*VAPOR PRESSURE, RESONANCE ABSORPTION), (*COPPER, LINE SPECTRA), ABSORPTION SPECTRA, SPECTROSCOPY ...
... Title : STUDY OF INFRARED ABSORPTION SPECTRA OF POLYMERS BASED ON BISPHENOLS AND FORMALDEHYDE DURING THEIR ...
... Title : PARAMAGNETIC RESONANCE ABSORPTION SPECTRA OF DIVALENT MANGANESE AND TRIVALENT IRON IN CALCITE. ...
... NITROGEN DIOXIDE, PHOTODISSOCIATION, ABSORPTION SPECTRA, ULTRAVIOLET SPECTRA, ULTRAVIOLET SPECTROMETERS. ...
... Descriptors : *PROTONS, *HYDROGEN, *SILICON, *ABSORPTION SPECTRA, *INFRARED SPECTRA, *IMPLANTATION, REPRINTS. ...
... Accession Number : AD0702966. Title : INFRARED ABSORPTION SPECTRA OF SOME MONOETHERS OF PHENYLETHYLENE GLYCOL,. ...
... Accession Number : AD0836883. Title : INFRARED ABSORPTION SPECTRA OF ATMOSPHERIC DUST,. Corporate Author ...
... (Author). Descriptors : (*NITROGEN COMPOUNDS, FLUORIDES), (*FLUORIDES, ABSORPTION SPECTRA), ARGON, CRYSTALS, IMPURITIES ...
... TERBIUM, SPECTROSCOPY), CALCIUM COMPOUNDS, TUNGSTATES, IMPURITIES, ABSORPTION SPECTRA, FLUORESCENCE, IONS, ...
... summarizing the best estimate of cross section versus ... ABSORPTION SPECTRA), ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, RESOLUTION ...
Students are introduced to leaf structure, plant pigments, and absorption spectra of spinach and red algae. Next, students use a spectrophotometer to determine the effects of different wavelengths of light on photosynthetic rate and electron transport.
NSDL National Science Digital Library
The UV-visible absorption spectra and photoisomerisation properties are noticeably different for the two structural isomers; (E,E)-m-1 behaves similarly to ...
NASA Website
... Absorption of Infrared Radiation by Nitrous Oxide from 760 ... Descriptors : (*NITROGEN OXIDES, *INFRARED SPECTRA), ABSORPTION SPECTRA ...
... Absorption of Infrared Radiation by Nitrous Oxide from 4000 ... Descriptors : *NITROGEN OXIDES, *INFRARED SPECTRA, ABSORPTION SPECTRA ...
... SPECTRA, ULTRAVIOLET SPECTRA, ABSORPTION SPECTRA, ORGANIC SULFUR COMPOUNDS, CHEMICAL REACTIONS, GUANIDINES. ...
... SPECTRA, ABSORPTION SPECTRA, ORGANIC SOLVENTS, ULTRAVIOLET SPECTRA, SULFONIC ACIDS, ORGANIC SULFUR COMPOUNDS. ...
... SPECTRA, METHANE, ETHANOLS, ULTRAVIOLET SPECTRA, VISIBLE SPECTRA, EXCITATION, HALOGEN COMPOUNDS, CHEMICAL BONDS ...
In this talk we will present the first high resolution spectra obtained on the Far-Infrared (FIR) AILES beamline at SOLEIL. This bright FIR beam is used as a continuum source for high resolution absorption experiments. For this purpose a multipass cell (baselength of 2.52 m) has been developed in order to reach typical absorption ...
We demonstrate mid-infrared spectroscopy of large molecules with broad absorption features using a tunable external cavity quantum cascade laser. Absorption spectra for two different Freons are measured over the range 1130-1185 cm(-1) with 0.2 cm(-1) resolution via laser photoacoustic spectroscopy with quartz ...
We demonstrate mid-infrared spectroscopy of large molecules with broad absorption features using a tunable external cavity quantum cascade laser. Absorption spectra for two different Freons are measured over the range 1130-1185 cm?1 with 0.2 cm?1 resolution via laser photoacoustic spectroscopy with quartz tuning ...
We demonstrate mid-infrared spectroscopy of large molecules with broad absorption features using a tunable external cavity quantum cascade laser. Absorption spectra for two different Freons are measured over the range 1130-1185 cm-1 with 0.2 cm-1 resolution via laser photoacoustic spectroscopy with quartz tuning ...
... the expansion starts cylindrically propagating sound disturbances ... Descriptors : *ABSORPTION SPECTRA), (*GASES, ABSORPTION, LIGHT, LIGHT ...
It has been shown by recording the derivative absorption spectra of various different substances that it is possible to resolve the fine structure which cannot be obtained when the spectra are recorded using conventional spectrophotometers. This method is particularly valuable in the study of complex formation by ...
Natural circular dichroism (CD) of alanine (Ala) and valine (Val) films were measured in vacuum ultraviolet region using a polarizing undulator as a circularly polarized light source. Compared with absorption spectra, CD spectra showed clear differences between Ala and Val films. In order to explain these ...
Ten ghost spectra which simulate the absorption-line spectrum of the QSO 4C 05.34 are generated on a computer and analyzed according to the rules of Bahcall and Goldsmith. The results conclusively show that the number and properties of the absorption redshift systems proposed by Bahcall Goldsmith are insignificantly ...
A procedure is proposed for obtaining undistorted IR spectra of coals in tablets with KBr using an airtight heated cell of the flow-through type. A comparative quantitative analysis of the bands in the region of hydroxyl absorption for coals of the metamorphic series has been performed. Three types of absorption bands of hydroxyl ...
Spectrophotometric studies were made of plutonyl nitrate complex formation in acetone. The compositions of the complexes and their evolution were determined. The absorption spectra of a complex trinitratoplutonyl compound had complex characteristics and differed considerably from perchlorate and plutonyl nitrate ...
The polarized photoacoustic, absorption and fluorescence spectra of chloroplasts and thylakoids in unstretched and stretched polyvinyl alcohol films were measured. The intensity ratios of fluorescence bands at 674 nm, 700 nm, 730 nm and 750 nm, and the polarized fluorescence excitation spectra are strongly dependent on light ...
Theoretical Lyman ? absorption profiles show a significant dependence on temperature of the H2 satellite at 1600 �, whereas the H2+ satellite at 1400 � remains unchanged. The use of opacities calculated with different approximations concerning the electric dipole transition moment (constant, dependent on interatomic distance, and modulated by the ...
Euglena gracilis possesses a simple but sophisticated light detecting system, consisting of an eyespot formed by carotenoids globules and a photoreceptor. The photoreceptor of Euglena is characterized by optical bistability, with two stable states. In order to provide important and discriminating information on the series of structural changes that Euglena photoreceptive protein(s) undergoes ...
The ultraviolet absorption spectra of 13 different chemical classes of drugs and toxic organic compounds were studied. A classification system has been developed in which compounds with the same conjugated molecular system and auxochrome substituents are grouped together. Each of these groups has characteristic ...
... INFRARED ABSORPTION SPECTRA ATTRIBUTED TO loft-NUCLEATED WATER CLUSTERS Qt ... NRR ABSORPTION SPECTRA ATTRIBUTEpý ...
The transient absorption decay times of tetraphenylbutadiene (TPB) and tetraphenylmethylbutadiene (TPMB) are measured as a function of solvent viscosity and of probe wavelength. The TPB spectra suggest that after excitation, TPB relaxes to the bottom of the excited state well where it relaxes radiatively to the ground state surface. TPMB transient ...
DOE Information Bridge
The optical properties of marine phytoplankton were examined by measuring the absorption spectra and fluorescence excitation spectra of chlorophyll a for natural marine particles collected on glass fiber filters. Samples were collected at different depths from stations in temperate waters of the Southern California ...
We have studied the absorption, fluorescence, and surface-enhanced Raman scattering (SERS) spectra of sanguinarine using a silver hydrosol and an electrochemical cell with a silver working electrode for different pH values in the medium. We carried out quantum chemical calculations in order to interpret the electronic and vibrational ...
The spectra of anhydrous uranyl nitrate in organic solvents were investigated in the range from 360 to 500 m mu . The spectra retained their vibrational character in all investigated solvents and do not differ markedly from those of the sesquihydrate and other hydrates. The appearance of 10 absorption ...
Unexpected absorption in the real atmosphere in the window from 840 to 890 nm has been clearly observed through measurements of direct solar spectral irradiance under clear, cloud-free skies. This absorption is not predicted by the known theoretical models. The cause of this apparent absorption may be due to the presence of high thin ...
We describe simulations of absorption difference spectra in strongly coupled photosynthetic antennas. In the presence of large resonance couplings, distinctive features arise from excited-state absorption transitions between one- and two-exciton levels. We first outline the theory for the heterodimer and for the ...
PubMed Central
The Optical transmission and UV-VIS absorption spectra have been recorded for different proportion of PVA and PAM. Transmittance, absorbance, and reflectance of pure and blends polymer are investigated. Optical properties such as the absorption coefficient, optical (Direct/Indirect) energy gap, ...
Undoped and CuO-doped lithium phosphate, lead phosphate and zinc phosphate glasses were prepared. UV�visible and infrared absorption spectra of the prepared samples were measured before and after successive gamma irradiation. Experimental optical spectra of the undoped samples reveal strong UV absorption bands, ...
