Fig. 8.6 shows a comparison of synchronous fluorescence spectra in NMP and chloroform. The difference between the spectra indicates the presence of relatively large aromatic systems that are insoluble in NMP alone, probably because they are shielded by an array of aliphatic pendant groups. Rogel et...
ALKYLATIONThe chloroform soluble portion of dimethylacetamide extract from a subbituminous coal was subjected to different types of chemical modification i.e. reduction, reductive alkylation, non-reductive alkylation, 'ionic' oxidation with subsequent alkylation, etc. The products of the reactions were ...
2.5. Matrix-Assisted Laser Desorption Ionization Time-of-Flight (MALDI-TOF) Mass Spectrometry MALDI-TOF mass spectra were measured on an AB SCIEX TOF/TOF 5800 system equipped with an OptiBeam On-Axis Laser in a reflector positive mode. The P3HT samples (in THF; 1.5 mg mL–1, 10 μL) ...
A chloroform‐resistant, low‐molecular‐mass matrix for 252Cf‐plasma desorption mass spectrometryNois available for this article.doi:10.1002/oms.1210260919G. AllmaierE. PittenauerE. R. SchmidWiley-BlackwellOrganic Mass SpectrometryAllmaier, G., Pittenauer, E., Schmid, E. R. (1991) Org. ...
(GP) as a control for NMR and DMR, and short-tailed shrew (shrew,Blarina brevicauda) as a control for EM and SNM. Electrophoresis showed that the HA from all five subterranean species had a high molecular mass reaching up to 8000 kDa and above, while HA of the three aboveground ...
The mesomorphic compound N‐(4‐hexyloxybenzoyl)‐N′‐(4′‐nitrobenzoyl)hydrazine (C6‐NO2), containing a dihydrazide unit in the rigid core, exhibited a highly stable SmA1 phase (between 172.2 and 259.5°C) and strong gelation ability in chloroform and other non‐protonic organic solvents. ...
Reaction mix with the enzyme only (E, Lane4), substrate only (S, Lane 5), and with both (E + S, Lane 6) were extracted with chloroform/methanol and separated in a solvent containing hexane:diethyl ether:acetic acid (70:30:3, vol:vol). Typical results of three independent ...
The most important step is reaction of the free base (3) in a ring-opening nucleophilic substitution with 1,4-butane sultone followed by the acid-catalysed deprotection. Characterization of the resulting organic ligand (5) was accomplished via NMR spectroscopy and mass spectrometry analysis, which ...
After the mixture was boiled for 10 min., 600 µL phenol-chloroform-isoamyl alcohol was added. The mixture was shaken vigorously for 5 min and centrifuged at 11600x g for 10 min. The upper phase was transferred to another Eppendorf tube and 3 M sodium acetate (0.1 volume) and ethanol ...
Molecular dynamics simulations at temperatures of 270, 330, and 390 K have been carried out to address the question of cation migration upon chloroform sorption in sodium zeolite Y. The results show that sodium cations located in different sites exhibit different types of mobility. These may be ...