Varian Cary

Co concentration was determined by spectrophotometer (Varian Cary 500) at 692 nm wave length, with the sample diluted with a 9 mol/L concentrated HCl solution. NO content in gas phase was obtained by an on-line Fourier transform infrared spectrometer (Nicolet E.S.P. 460 FT-IR) equipped with a gas cell and a quantitative package, Quant Pad. 

Ultraviolet-visible (UV-vis) diffuse reflectance spectra of supported WOx samples and standard W compounds were obtained with a Varian (Cary 5E) spectrophotometer using polytetrafluoroethylene as a reference. The Kubelka-Munk function was used to convert reflectance measurements into equivalent absorption spectra [12]. Spectral features of surface WOx species were isolated by subtracting from the W0x-Zr02 spectra that of pure Z1O2 with equivalent tetragonal content. All samples were equilibrated with atmospheric humidity before UV-vis measurements. 

The Au contents were analyzed by ICP. UV-vis diftuse reflectance spectroscopy (DRS) was performed on a Varian Cary IE UV-VIS Spectrometer. X-ray diftfaction patterns were coUected using a Rigaku dififtactometer with Cu radiation. The surface area and the pore size distribution was obtained using nitrogen adsorption. 

Instrumentation. UV-Vis spectra were recorded at 30°C over a range of 200-900 mn on a Varian Cary 50 with WinUV Analysis Suite software, Vers. 3.0, using Suprasil ... 

Catalysts were prepared from an alkali form of ferrierite, NaK-FER, with a Si/Al = 9 (TOSOH Co., Japan). The monometallic Co-HFER (3 wt. % Co) was obtained by ionexchanging the NH4-FER form with a Co(CH3COO)2 solution. The bimetallic Co/Pd-HFER sample (0.3 wt. % of Pd, 3wt. % Co) was then prepared by ion-exchanging it with a solution of Pd(NH3)4(N03)2. Further details are given elsewhere [10], UV-Vis/RDS spectra were carried out on a Varian Cary 5000 UV-VIS-NIR spectrophotometer. H2-TPR experiments were performed using samples of 130 mg of catalyst, under a mixture of 5% H2/Ar from RT to 1000°C (7.5°C min"1). 

A Varian Cary 100 model UWis spectrophotometer was used for optical absorbance measurements. The absorbance measrrrements were conducted in situ for the study of the kinetics of adsorption process. In all experiments, the size and mass of ACC was kept as constant as possible (about 18.0 0.1 mg). Weighed ACC pieces were pre-wetted by leaving in water for 24 h before use. The idea of using pre-wetted ACC originates from previons findings that pre-wetting enhances the adsorption process [9, 11],... 

UV-Vis absorbance of the solutions was measured on a Varian Cary 50 Spectrophotometer from 400-1000 nm at the initial introduction of solutions and at the end of the experiment. 

General. NMR spectra were obtained on a Bruker WM-250 instrument with tetramethylsilane (TMS) as internal standard. UV-visible spectra were taken on a Varian Cary 219. Fast-atom bombardment (FAB) mass spectrometry (MS) analysis were completed on a Vacuum Generators ZAB-2F double-focusing or a Varian MAT CH5 mass spectrometer equipped with an Ion Tech FAB Gun. Solvents for FAB matrix were made up of thioglycerol, dithiothreitol, and dithioerythretol (2 1 1) addition of 0.1M trifluoroacetic acid to the matrix facilitated the ionization of the porphyrins during FAB analysis.(13)... 

Figure 20-2 (cQ Varian Cary 3E Ultraviolet-Visible Spectrophotometer, (b) Optical train. [Courtesy Varian Australia Ply, lid., Victoria, Australia.]... 

Raman spectra were taken on a home built system, composed of Spectra-Physics 2020 series lasers, coupled with a Dilor XY-800 triple spectrometer and a Whight Instruments nitrogen cooled CCD. All samples were measured at room temperature in a backscattering configuration, with 514.53 nm Ar+ laser excitation. The laser power was tuned between 1 mW and 30 mW. UV-VIS diffuse reflectance spectra were taken on a Varian Cary 5 spectrophotometer, equipped with a specially designed Praying Mantis diffuse reflectance attachment of Harrick. 

N, adsorption for determination of pore size distribution(BJH method) using a Micrometries ASAP 2000 automatic analyzer. FTIR spectra were recorded on a PerkinElmer 221 spectrometer and UV-vis spectroscopic measurments were carried out using Varian CARY 3E double beam spectrometer in the range of 190 - 820 nm. 

The temperature was indicated and controlled to 0.1°C with a platinum resistance probe which extended 1 mm inside the inner surface of the cell. The pressure was adjusted using a 100 cc Ruska syringe pump and was measured to within 0.1% with a 710A Heise digital pressure gauge which is traceable to an NBS standard. The pressure varied less than 0.15 bar (2 psi) during a spectral scan. The wavelength accuracy was 0.2 nm for the Varian (Cary) 2290 spectrophotometer. 

All UV/vis spectra were recorded on a Varian Cary 50 Scan spectrophotometer and a PERKIN ELMER UV/vis Spectrometer Lambda 2 (double beam) in solution. Absorption maxima Xmax are given in nm. 0.4 cm quartz cuvettes were used for all measurements. 

Figure 6 The structure of the potent quasi-irreversihle CYP3A4 inhibitor troleando-mycin (top panel), the metabolic steps required to convert troleandomycin into a nitroso metabolite that coordinates with the ferrous-heme of CYP3A4 (side panel), and the spectral changes associated with MI complex formation (bottom panel). Troleandomycin (50 pM) was incubated at 37°C with a human liver microsomal sample with high CYP3A4/5 activity (1 mg/mL) andNADPH (1 mM) for the times indicated. The reference cuvette contained the same components minus troleandomycin. Scans from 380 to 520 nm were recorded on a Varian Cary 100 BIO IJV/Vis dual beam spectrophotometer. Abbreviation MI, metabolic intermediate.

On the high-pressure device, the infrared measurements are performed using a Bruker Tensor 37 FTIR spectrometer. The IR configuration includes a NIR source, the Tensor 37 interferometer with a CaF2 beam splitter and a thermoelectrically-cooled InAs detector. The UV Visible measurements are made using a Varian Cary 300 spectrometer equipped with 600 pm core diameter optical fibres. 

All reactions were carried out under an argon atmosphere. The solvents used were of commercial p.a. quality. H and 13C NMR data were obtained on a Bruker ARX 400 spectrometer. Phase transitions were studied by differential scanning calorimetry (DSC) with a Bruker Reflex II thermosystem at a scanning rate of 10 °C min-1 for both heating and cooling cycles. UV-Vis and fluorescence spectra were recorded on a Jasco V-550 spectrophotometer and a Varian-Cary Eclipse spectrometer, respectively. Low-resolution mass spectra were obtained on a Varian... 

The UV-vis-NIR spectra of isolated EMF.v were recorded between 300 and 1100 nm in a toluene solution using a Varian Cary 500 Scan UV-Vis-NIR -spectrophotometer. 

In vivo light absorption spectra (400-700 nm) were recorded with a Varian-Cary spectrophotometer equipped with an integrating sphere. Samples were taken to an approximate optical density of 0.1. Data were corrected for scattering by subtracting a baseline value as measured at 725 nm. The spectrally averaged, chlorophyll a specific absorption cross section (aph, m2 mg Chi a-1) was calculated as follows ... 

Many commercial visible-UV spectrophotometers are suitable for this experiment. These instruments range from simple single-beam devices such as the Spectronic model 20 to high-performance double-beam scanning spectrophotometers such as various Varian-Cary models. The components and operational principles of these instruments are... 

Optical diagram of Varian-Cary models 219 and 2000 series double-beam spectrophotometers (available as models 400 and 500 from Varian). 

CW-EPR X-band measurements were performed on a Bruker ESP 300E Spectrometer at a temperature of 120 K. The CuHis complexes are paramagnetic due to the S=l/2 spin of the Cu " ion. Nitrogen physisorption was performed with a Micromeritics ASAP 2400 apparatus. Measurements were done at 77 K. Prior to the measurements the zeolite samples were degassed for 24 hours at 373 K in vacuum. Micropore volumes and pore size distributions were determined with standard BET and BJH theory. Diffuse Reflectance Spectroscopy of the CuHis complex encapsulated zeolite samples were taken on a Varian Cary 5 UV-Vis-NIR spectrophotometer at room temperature. The DRS spectra were recorded against a halon white reflectance standard in... 

The analysis was performed in a Varian Cary 5 spectrophotometer equipped with a Harrick diffuse reflectance chamber. The first spectra were taken after drying at 473K for 1 h, then after a reduction at 773K for 1 h passing a 20% H2/N2 flow at lOK/min. The spectra were taken at room temperature in the range 200-2000 nm, using zeolite HUSY as reference [9]. 

Diffuse reflection spectroscopy (UV-DRS). UV-Vis diffuse reflectance spectra were recorded in a Varian Cary 5 spectrophotometer (Harrick Scientific) with a diffuse reflectance accessory of Praying Mantis geometry. The samples were set in holds with 2 mm thickness. The spectra were recorded in the 200 nm and 800 nm range with a scanning speed of 1800 mm.min at room temperature against supports as reference. 

Rates of hydrolysis were measured on a Varian Cary 219 UV spectrophotometer equipped with a Haake constant temperature bath. A stirred batch tank reactor was placed in a water bath maintained at 26.0 0.1 C and the solution was transported to a micro flow UV cell located in the spectrophotometer via silicone rubber tubing using a precision flow peristaltic pump (MHRE 22) manufactured by the New Brunswick Scientific Company. 

The prepared catalysts were analyzed by X-ray powder diffraction (XRD), Diffuse Reflectance Spectra (DREAS), Inductive coupled plasma-atomic emission spectrometric analysis (ICP-AES) and scanning electron microscopy (SEM). The catalysts were characterized by XRD before and after calcination, using a Philips PW 1877 automated powder diffractometer with CuKa radiation. DREAS measurements were recorded on a Varian Cary-1 spectrophotometer using BaS04 as a reference. ICP-AES measurements were recorded on a Perkin-Elmer Plasma 40 (ICP) or Perkin-Elmer 1100 (AES). SEM measurements were recorded on a Philips XL-20 microscop. 

The crystal structure was checked by X-Ray diffraction using a Philips PW 1877 automated powder diffractometer with CuKa radiation. AAS and ICP-AES measurements were carried out with Perkin Elmer instruments type 1100, 5000 Z and Plasma-40. UV/VIS measurements were carried out on a Varian Cary spectrometer. Diffuse reflectance spectra were recorded against a barium sulphate reference on the Varian Cary-3 and reflectance spectra were converted according to the Kubelka-Munk equation. 

All new compounds were fully characterized by spectroscopic data. UV-visible absorption spectra were measured with a Varian Cary 50 spectrophotometer. Spectroscopic measurements were done by using spectral grade solvents at 25 °C. Semi-empirical MO calculations were carried out with the AMI-COSMO method in the MOP AC package (MOPAC2000 ver. 1.0, Fujitsu Ltd, Tokyo, Japan, 1999). 

Tenn. Electronic spectroscopy was performed on a Varian Cary 17 recording spectrophotometer and a Nicolet Fourier Transform Infrared instrument was used to record spectra between 4000 and 200 cm l of samples in Csl. Electrical measurements were performed at room temperature on compacted samples by a four probe technique. TGA was performed on a DuPont 990 Analyzer using a DuPont 951 TGA module. TGA for the GC/MS analysis was performed on a DuPont 950 instrument. Volatile products were collected in a Tenax containing tube which was attached to the GC inlet port, GC/MS was performed on a Hewlett Packard 5982A coupled to a 5934A data system. DSC was performed on a DuPont 1090 analyzer using a DuPont 910 DSC module. 

Apparatus. The excitation and emission spectra were measured on a Varian Cary-Elips fluorescence spectrophotometer. UV absorption measurements were taken in a Hitachi U-3400 UV-VIS spectrophotometer. The H1 NMR spectra were measured on Bruker AV400 NMR spectrophotometer. 

The nature of the Pd-solvated species in the Na2PdCl4 mother solution during the Pd precipitation process has been monitored by means of UV-Vis spectroscopy, performed in transmission mode on a Varian Cary 300 Scan instrument. The precipitate phases have been investigated by UV-Vis in reflectance mode on a Perkin-Elmer Lambda 19 instrument and by an XRD Huber G670 instrument (Cu-Kui anode). A Micromeritics Autochem 2910 instrument has been used for the TPR and CO chemisorption measurements. 

Cu(N03)2 aqueous solution for one day. The samples were filtered, washed and dried imder ambient conditions. We denote the samples obtained at this stage as CuCli. For the reduction of Cu, heating in a dry H2 flow at temperatures from 150 to 450 °C for 4 hrs was carried out. We denote the samples obtained after such a procedure as Cu" Cli. The copper content in the samples was determined by atomic absorption spectrometry. Diffuse reflectance spectra (DRS) were collected on a Varian Cary 300 spectrophotometer. 

The as-synthesized materials, /. e. micelle-bearing systems, were characterised by XRD and UV-Vis spectroscopy. XRD patterns were recorded using an XTert Philips diffractometer, with CuKa radiation. Reflectance UV-visible spectra were recorded using a Varian Cary 5 spectrophotometer. 

Figure 13-22 shows the optical design of the Varian Cary 100, a more sophisticated, double-beam-in-timo recording spectrophotometer. This instrument employs a 30 X. 3.S mm plane grating having 120()lines/mm. Us range is from 190 to 9(X1 nm. Randwidths of 0.2 to... 

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