Multidimensional Chromatographic Separation and Characterization of Polyethers

1994 ◽  
Vol 66 (13) ◽  
pp. 2163-2169 ◽  
Author(s):  
Tetsuo. Okada
Keyword(s):  
Chromatographic Separation

Characterization of New Amphiphilic Block Copolymers of N-Vinylpyrrolidone and Vinyl Acetate, 2 - Chromatographic Separation and Analysis by MALDI-TOF and FT-IR Coupling

2010 ◽  
Vol 211 (15) ◽  
pp. 1678-1688 ◽  
Author(s):  
Nick Fandrich ◽  
Jana Falkenhagen ◽  
Steffen M. Weidner ◽  
Bastiaan Staal ◽  
Andreas F. Thünemann ◽  
...  
Keyword(s):  
Block Copolymers ◽  
Vinyl Acetate ◽  
Chromatographic Separation ◽  
Amphiphilic Block Copolymers ◽  
Maldi Tof ◽  
Ft Ir

scholarly journals Preparation of 93Mo solution using proton irradiated Nb

2019 ◽  
Vol 322 (3) ◽  
pp. 1833-1839 ◽  
Author(s):  
Szabolcs Osváth ◽  
Jixin Qiao ◽  
Xiaolin Hou
Keyword(s):  
Nuclear Waste ◽  
Chromatographic Separation ◽  
Liquid Scintillation ◽  
Decontamination Factor ◽  
Liquid Scintillation Spectrometry ◽  
Target Holder ◽  
Carrier Free ◽  
Long Time ◽  
Co Precipitation

Abstract 93Mo is an important long-lived radionuclide in nuclear waste, and is required to be measured during the characterization of decommissioning waste. However, no commercial 93Mo solution is available to be calibrated and used as standard in the analysis of nuclear waste. This work presents a method for separation of 93Mo from Nb metal used in cyclotron as a target holder and irradiated with protons for long time. The separation of 93Mo from Nb matrix was implemented by combination of precipitation and chromatographic separation. The Nb matrix was first removed by precipitating oxides-hydroxides of Nb (e.g. Nb2O5) and then by Fe(OH)3 co-precipitation; Mo in the solution was purified using an alumina (Al2O3) column. A decontamination factor of ca. 105 was achieved for Nb. A pure carrier-free 93Mo solution was successfully prepared, and the 93Mo purity was verified by liquid scintillation spectrometry.

CHROMATOGRAPHIC SEPARATION AND CHARACTERIZATION OF MONO-, DI- AND TRIAROMATIC HYDROCARBONS IN GAS OIL

1989 ◽  
Vol 7 (3) ◽  
pp. 281-291 ◽  
Author(s):  
Hassanin A. Rashid ◽  
Nabeel A. Fakhri ◽  
Sarmad B. Dekran ◽  
Nooraldeen I. Abdulla
Keyword(s):  
Chromatographic Separation ◽  
Gas Oil

scholarly journals Chemical and Biological Investigations of Cerbera odollam Gaertn

2018 ◽  
Vol 16 (2) ◽  
pp. 179-186 ◽  
Author(s):  
Monica Sharfin Rahman ◽  
Adnan Faisal ◽  
Choudhury Mahmood Hasan ◽  
Monira Ahsan ◽  
Mohammad Mehedi Masud
Keyword(s):  
Carbon Tetrachloride ◽  
Secondary Metabolites ◽  
Petroleum Ether ◽  
Chromatographic Separation ◽  
Methanolic Extract ◽  
Scientific Basis ◽  
Separation And Purification ◽  
Isolation And Characterization ◽  
Soluble Fractions

The present article describes the isolation and characterization of secondary metabolites from the leaves of Cerbera odollam as well as bioactivities of the crude methanolic extract and its petroleum ether (PE), carbon tetrachloride (CTC), chloroform (CF) and aqueous (AQ) soluble fractions. In this investigation, successive chromatographic separation and purification yielded β-amyrin (CO-01), lupeol (CO-02), β-sitostenone (CO-03) and triticusterol (CO-04). The study also indicated the antioxidant, cytotoxic, antimicrobial, membrane stabilizing activities and poor thrombolytic activities. Thus, the present study endeavors to provide scientific basis to establish Cerbera odollam as a potential medicinal plant.Dhaka Univ. J. Pharm. Sci. 16(2): 179-186, 2017 (December)

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