1H NMR spectroscopic studies reveal multiple conformers of cyclic opioid peptide analogs

Peptides ◽  
1992 ◽  
pp. 253-254
Author(s):  
Brian J. Marsden ◽  
Brian C. Wilkes ◽  
Peter W. Schiller
Keyword(s):  
1H Nmr ◽  
Opioid Peptide ◽  
Spectroscopic Studies ◽  
Peptide Analogs ◽  
Multiple Conformers

Novel opioid peptide analogs with mixed µ agonist/δ antagonist properties

Peptides 1994 ◽  
1995 ◽  
pp. 632-633 ◽  
Author(s):  
P. W. Schiller ◽  
G. Weltrowska ◽  
T. M.-D. Nguyen ◽  
C. Lemieux ◽  
N. N. Chung
Keyword(s):  
Opioid Peptide ◽  
Peptide Analogs

scholarly journals Investigations on Terminalia Arjuna Fruits: Part 1- Isolation of Comounds from Petroleum Ether Fractions

1970 ◽  
Vol 43 (1) ◽  
pp. 123-130 ◽  
Author(s):  
M Zahurul Haque ◽  
M Abdullah As Saki ◽  
M Umar Ali ◽  
M Yusuff Ali
Keyword(s):  
Petroleum Ether ◽  
Key Words ◽  
1H Nmr ◽  
13C Nmr ◽  
Chromatographic Separation ◽  
Spectroscopic Studies ◽  
Biologically Active ◽  
Terminalia Arjuna ◽  
Pure Compounds ◽  
Column Chromatographic

Arjun (Terminalia arjuna) is a source of many potent, biologically active compounds, planned all over Bangladesh. The chemical examinations of its fruits were taken up to isolate and identify active principles. For this purpose fresh fruits of Terminalia arjuna were extracted with rectified spirit. The extract was then triturated with petroleum ether (40-60°C), which was then subjected to column chromatographic separation followed by PTLC. Such separation led to the isolation of some new pure compounds, TA-1 to TA-5. The structures of compounds were characterized through spectroscopic studies (IR, 1H-NMR and 13C-NMR). Key words: Arjun, TA-1, TA-5, Spectroscopic studies DOI: 10.3329.bjsir.v43i1.863 Bangladesh J. Sci. Ind. Res. 43(1),123-130, 2008

scholarly journals Synthesis and Spectroscopic Studies of New Palladium(II) Complexes of N-hydroxymethyl Saccharin (Sac-CH2OH) and Amines or Diaminas Ligands

2019 ◽  
Vol 35 (1) ◽  
pp. 186-192 ◽  
Author(s):  
Ahmed S. Al-Janabi ◽  
Adnan A. Al-Dulaimi ◽  
Hayfa M. Gergees ◽  
Mohammed H. Saleh
Keyword(s):  
1H Nmr ◽  
Nmr Spectra ◽  
Spectroscopic Studies ◽  
Mixed Ligand ◽  
1H Nmr Spectra ◽  
Ethylene Diamine ◽  
Mixed Ligand Complexes ◽  
Conductivity Measurements

Treatment of the chelated palladium(II) complex, trans-[Pd(K2-Sac-CH2O)2].2H2O with one mole equivalent of the diammines (L-L), L-L = 2,2'-bipyridine (bipy),. ethylene diamine (en), 1,10-phenanthroline (phen), or N,N-dimethyl ethylene diammine (dmen) in EtOH solvent afforded mixed ligand complexes of the type [Pd(K1-Sac-CH2O)2(L-L)] in 82-93% yield. While treatment of trans-[Pd(K2-Sac-CH2O)2].2H2O with two mole equivalents of the monoamines (L), L=pyridine (py), 3-methylpyridine (3-mpy) or 3-aminopyridine (3-apy) in EtOH solvent gave trans-[Pd(K1-Sac-CH2O)2(L)2] complexes in 86-89% yield The prepared complexes were characterized by elemental CHN analysis, .conductivity measurements,. infrared and 1H nmr spectra.

In Vitro Monitoring of Total Choline Levels in a Bioartificial Pancreas: 1H NMR Spectroscopic Studies of the Effects of Oxygen Level

2000 ◽  
Vol 146 (1) ◽  
pp. 49-57 ◽  
Author(s):  
Robert C. Long ◽  
Klearchos K. Papas ◽  
Athanassios Sambanis ◽  
Ioannis Constantinidis
Keyword(s):  
1H Nmr ◽  
Spectroscopic Studies ◽  
Oxygen Level ◽  
Bioartificial Pancreas

1H NMR Spectroscopic Studies on the Reactions of Haloalkylamines with Bicarbonate Ions: Formation of N-Carbamates and 2-Oxazolidones in Cell Culture Media and Blood Plasma

1995 ◽  
Vol 8 (8) ◽  
pp. 1046-1053 ◽  
Author(s):  
Maria L. Anthony ◽  
Elaine Holmes ◽  
Peter C. R. McDowell ◽  
Tim J. B. Gray ◽  
Melanie Blackmore ◽  
...  
Keyword(s):  
Cell Culture ◽  
Blood Plasma ◽  
1H Nmr ◽  
Culture Media ◽  
Spectroscopic Studies ◽  
Cell Culture Media ◽  
Bicarbonate Ions
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