Identification of Methyl Octanoate Derivatives from Autoxidized Methyl Linoleate by Mass Spectrometry, Nuclear Magnetic Resonance and Infra-red Spectroscopy

Nature ◽  
1966 ◽  
Vol 211 (5046) ◽  
pp. 298-299 ◽  
Author(s):  
R. J. HORVAT ◽  
W. H. MCFADDEN ◽  
H. NG ◽  
R. E. LUNDIN ◽  
W. G. LANE ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Methyl Linoleate ◽  
Methyl Octanoate ◽  
Infra Red ◽  
Autoxidized Methyl ◽  
Nuclear Magnetic

scholarly journals Intramolecularly stapled amphipathic peptides via a boron–sugar interaction

2020 ◽  
Vol 56 (62) ◽  
pp. 8814-8817 ◽  
Author(s):  
Monika Kijewska ◽  
Angelika Czerwińska ◽  
Samah Al-Harthi ◽  
Grzegorz Wołczański ◽  
Mateusz Waliczek ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Circular Dichroism ◽  
Magnetic Resonance ◽  
Phenylboronic Acid ◽  
Intramolecular Interactions ◽  
Peptide Chain ◽  
Amphipathic Peptides ◽  
Circular Dichroïsm ◽  
Nuclear Magnetic

The intramolecular interactions between the fructosyl moiety and phenylboronic acid incorporated into various positions of the peptide chain were investigated using mass spectrometry (MS), circular dichroism (CD), and nuclear magnetic resonance (NMR).

scholarly journals GALLIC ACID FROM PODS OF JIRINGA (ARCHIDENDRON JIRINGA [JACK] I.C. NIELSEN) AND ITS ANTIOXIDANT

2018 ◽  
Vol 11 (13) ◽  
pp. 114 ◽  
Author(s):  
Misri Yanty Lubis ◽  
Lamek Marpaung ◽  
Muhammad Pandapotan Nasution ◽  
Partomuan Simanjuntak
Keyword(s):  
Mass Spectrometry ◽  
Nuclear Magnetic Resonance ◽  
Antioxidant Activity ◽  
Phenolic Compounds ◽  
Magnetic Resonance ◽  
Gallic Acid ◽  
13C Nmr ◽  
Pure Compound ◽  
Infra Red ◽  
High Antioxidant Activity

 Objective: This study was aimed to isolate and investigate antioxidant activity of gallic acid in pods of jiringa (Archidendron jiringa [Jack] I.C. Nielsen).Methods: Pods of jiringa were extracted by maceration. Phenolic compounds were tested using FeCl3. Identification of pure compound was obtained from spectra data from nuclear magnetic resonance of proton H (1H NMR), NMR of carbon (13C NMR), infra-red, and mass spectrometry. Antioxidant activity was investigated using 1,1-diphenyl-2-picrylhydrazyl method.Results: The IC50 of gallic acid from jiringa’s pods (A. jiringa [Jack] I.C. Nielsen) was 3.65 μg/ml. This value showed that gallic acid from jiringa’s pods (A. jiringa [Jack] I.C. Nielsen) had high antioxidant activity.Conclusions: Gallic acid presents in pods of jiringa (A. jiringa [Jack] I.C. Nielsen) and has high antioxidant activity.

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