Shimadzu studies

Photolytic reactions were studied using Shimadzu UV-Visible spectrophotometer with Spectrum and Quantitative Mode. The pH measurements were performed by TOA Electronics pH meter at 20 °C. 

Mondello et al. (2, 20-23) have used a multidimensional gas chromatographic system based on the use of mechanical valves which were stable at high temperatures developed in their laboratory for the determination of the enantiomeric distribution of monoterpene hydrocarbons (/3-pinene, sabinene and limonene) and monoterpene alcohols (linalol, terpinen-4-ol and a-terpineol) of citrus oils (lemon, mandarin, lime and bergamot). Linalyl acetate was also studied in bergamot oil. The system consisted of two Shimadzu Model 17 gas chromatographs, a six-port two-position valve and a hot transfer line. The system made it possible to carry out fully... 

The acidic properties of the bare supports were studied by IRS method using CO adsorption at 77 K. The IR spectra were measured on a Shimadzu FTIR-8300 spectrometer over a range of 700-6000 cm with a resolution of 4 cm. Before spectra registration, sample of the supports powder was pressed in wafer (p = 0.007-0.016 g/cm ) and treated in vacuum (450°C, 1 hr., < 10 Torr). 

UV spectroscopic studies of chlorpromazine hydrochloride were conducted in ethanol and water solutions, and the resulting spectra are shown in Figure 3. The data were obtained between 200 and 345 nm using a Shimadzu 1601 PC UVA IS spectrophotometer (Figure 3). 

The mass spectrum of chlorpromazine hydrochloride was obtained using a Shimadzu PQ-5000 mass spectrometer [13], In this study, the parent ion was collided with helium as the carrier gas, and an ionization beam energy of 70 eV was used. The mass spectrum thusly obtained is presented in Figure 7. The molecular ion peak was observed at m/z = 318.2, and the base peak was at m/z = 58.2. Assignments for the fragmentation pattern, the peak relative intensities, and the proposed structures are found in Table 5. 

Hideko Sone National Institute for Environmental Studies, Ibaraki, Japan Makiko Suwa Computational Biology Research Center (CBRC), National Institute ofAdvaneed Industrial Science and Technology (AIST), Tokyo, Japan Takashi Suzuki Life Science Laboratory, Analytical and Measuring Instruments Division, Shimadzu Corporation, Kyoto, Japan Hisao Takeuchi Mitsubishi Chemical Group Science and Technology, Inc., Yokohama, Japan... 

The absorption spectra of the dyes were measured with a Shimadzu UV-3101 PC spectrophotometer (Japan) in a cell with a 1-cm optical path length. The fluorescence and fluorescence excitation spectra were studied with the use of a Shimadzu RF-5301 PC spectrofluorimeter. To study the triplet state of the dyes, apparatuses of flash photolysis with xenon lamp excitation (with an energy of 50 J and a pulse length at half maximum of xi/2 = 7 ps) [6] was used. To detect the triplet state of the dyes, the solutions were deoxygenated using a vacuum unit or purged with argon for experiments on the laser flash photolysis apparatus. A... 

Zhang et al. [43] developed and validated a stability indicating HPLC method for the determination of lornoxicam in pharmaceutical formulation. The isocratic procedure was performed in Shimadzu ODS (4.6 mm x 15 cm, 5 pm) column maintained at 25 °C. The mobile phase was degassed mixture of sodium acetate (0.05 mol/L, pH 5.8) and methanol (55 45). The flow rate was 1 ml/min and detection at 290 nm. Selectivity, specificity, linearity, precision, accuracy, and robustness were evaluated to validate the analytical method. Forced degradation studies were performed to provide an indication of the stability-indicating capacity. The stability indicating method for lornoxicam in the injectable dosage was developed and validated. The method can be considered for routine analysis and quality control of lornoxicam in injectable formulation. 

The objective of this study is to compare the strengfti of adsorptive interaction between adsorbents and thiophene/benzene. Extremely low partial pressures at less than 10 atm would be necessary to meet this objective if isotherms were measured at ambient temperature, because the isotherms at ambient temperature are fairly flat and are difficult to compare. However, it is very difficult to obtain and control such low partial pressures experimentally. Therefore, single component isothoms for benzene and thiophene were measured at 90, 120 and 180 °C using standard gravimetric methods. A Shimadzu TGA-50 automatic recording microbalance was employed. Isosteric heats of adsorption were calculated using the Clausius-Clapeyron equation from isotherms at different temperatures. 

To study the molecular distribution of water-soluble and MeOH-soluble portions, gel permeation chromatography (GPC) (Shimadzu LC-IOA) which consisted of a high pressure pump (Shimadzu Co, Model LC-IOAT) was performed with a column of KF-803L, operated at 401 with flow rate of 1.0 mL/min of tetrahydrofuran, The molecular weight of the fractions was determined from calibration curve obtained with polystyrene as a standard. 

The same experimental setup detailed in Chapter 8 was adopted in the present study. Graphite rods 6 mm diam. and 150 mm length (99.999% purity) used as electrodes were obtained from Aldrich. All solvents used were analytical or HPLC grades from Fluka. Liquid nitrogen was supplied by SIAD gas tecnici (Italy). The electric arc was conducted using d.c. current set at 10 A. The electronic absorption spectra were recorded on a Shimadzu UV160A spectrophotometer on filtered solutions. 

The experimental apparatus used for the atmospheric pressure kinetic studies provides a combination of on-line gas chromatography (Shimadzu-14B) and on-line mass spectrometry (Balzers QMG 064) for the analysis of reactants and products. N2, N2O, CO, CO2 and C3IL were measured via G.C., while NO at AMU 30 was continuously monitored via mass spectrometry. AMUs 28 (N2+CO), 44 (CO2+ N2O), 32 (O2), 41 (propene) and 17 (NH3) were also continuously monitored. 

Spectral studies of Et,NH+(TCNQ) composite films and the casting solutions were carried out with a Shimadzu Double-Beam UV-200S spectrophotometer. A small amount of DMF solution of a... 

---