Understanding the effect of solvent polarity on the polymorphism of octadecanoic acid through spectroscopic techniques and DFT calculations

CrystEngComm ◽  
2019 ◽  
Vol 21 (2) ◽  
pp. 297-309 ◽  
Author(s):  
Luiz F. Lobato Silva ◽  
Waldomiro Paschoal ◽  
Gardênia S. Pinheiro ◽  
José G. da Silva Filho ◽  
Paulo T. C. Freire ◽  
...  
Keyword(s):  
Organic Solvent ◽  
Stearic Acid ◽  
Dft Calculations ◽  
Solvent Polarity ◽  
Spectroscopic Techniques ◽  
Octadecanoic Acid ◽  
Effect Of Solvent

In this work, the polymorphism of octadecanoic acid (C18H36O2, stearic acid) was studied as a function of organic solvent polarity.

scholarly journals Correction: Photophysical properties of the intramolecular excited charge-transfer states of π-expanded styryl phenanthrimidazoles – effect of solvent polarity

RSC Advances ◽  
2016 ◽  
Vol 6 (87) ◽  
pp. 83709-83709
Author(s):  
V. Thanikachalam ◽  
A. Arunpandiyan ◽  
J. Jayabharathi ◽  
P. Ramanathan
Keyword(s):  
Charge Transfer ◽  
Photophysical Properties ◽  
Solvent Polarity ◽  
Effect Of Solvent

Correction for ‘Photophysical properties of the intramolecular excited charge-transfer states of π-expanded styryl phenanthrimidazoles – effect of solvent polarity’ by V. Thanikachalam et al., RSC Adv., 2014, 4, 6790–6806.

Solvent effect on simple and high yield synthesis of polydichlorophosphazene precursor Cl3PNSiMe3

2021 ◽  
Author(s):  
Elif Büşra Çelebi ◽  
Ferda Hacıvelioğlu
Keyword(s):  
Solvent Effect ◽  
Room Temperature ◽  
Solvent Polarity ◽  
High Yield ◽  
Effect Of Solvent ◽  
Nonpolar Solvents

The effect of solvent polarity on the reaction of PCl5 with (Me3Si)2NH has been investigated and it is found that nonpolar solvents promote the formation of Cl3PNSiMe3, whereas the more polar chloroform gives unusual phosphazenes at room temperature.

scholarly journals Evaluation of the Antibacterial Activities of Isolated Bioactive Components from the plant Adenodolichos paniculatus

2021 ◽  
Vol 19 (2) ◽  
pp. 429-447
Author(s):  
A.E. Onwuliri ◽  
I.F. Kyahar ◽  
J.O. Ehinmidu ◽  
P.O. Oladosu
Keyword(s):  
Staphylococcus Aureus ◽  
Pseudomonas Aeruginosa ◽  
Stearic Acid ◽  
Streptococcus Pyogenes ◽  
Antibacterial Activities ◽  
Bioactive Components ◽  
Octadecanoic Acid ◽  
Zones Of Inhibition ◽  
Rf Values ◽  
Component C

The three bioactive components isolated included: component A (major phytochemicals were Bis (2-ethylhexyl) phthalate (16.36 %), 9,12-Octadecadienoic acid, ethyl ether (14.77 %) and 9.cis., 11.trans.-octadecadie noate (14.77 %), component B (major phytochemicals were 9,12-Octadecadienal (Linoleic acid) (40.98 %), Octadecanoic acid (Stearic acid) (9.26 %), Undecanoic acid, 10-bromo- (10-bromoudecanoic acid) (9.26 %) and n-Hexadecanoic acid (Palmitic acid) and component C (cis-9-octadecenoic acid (Oleic Acid) (30.45 %), Octadecanoic acid (Stearic acid) (17.33 %)). These components isolated from the chloroform fraction of Adenodolichos paniculatus are used by traditional medicinal practitioners for the management of mouth and throat infections. The antibacterial activities against Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa were evaluated using bioautography and agar-well diffusion methods. The bioautogram result showed that component A had inhibited spots against S. pyogenes (17.50 mm) and P. aeruginosa (16.00 mm), corresponding to the TLC spots with Rf values of 0.594, 0.55 and 0.26, respectively. Component B showed inhibition spots against Streptococcus pyogenes (36.50 mm), Staphylococcus aureus (16.00 mm) and Pseudomonas aeruginosa (11.00 mm), corresponding to the TLC spots with Rf values 0.891, 0.87, 0.85 and 0.25, respectively. Component C showed inhibition spots against Streptococcus pyogenes (16.50 mm), Staphylococcus aureus (15.00 mm) and Pseudomonas aeruginosa (10.50 mm), corresponding to the TLC spots Rf values of 0.938, 0.44, 0.21 and 0.90, respectively. For the agar-well diffusion method, component A at 1 mg/ml inhibited Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa growths with zones of inhibition 23.0, 19.5 and 17.50 mm, respectively. MIC and MBC of component A were 125, 250 and 250 and 250, 500 and 500 μg/ml, respectively. Component B at 1 mg/ml inhibited Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa growth with zones of inhibition 30.0, 28.0 and 18.5 mm, respectively. MIC and MBC of the compound B were 31, 62 and 125 and 62, 125 and 250 μg/ml, respectively. Component C at 1 mg/ml inhibited Streptococcus pyogenes, Staphylococcus aureus and Pseudomonas aeruginosa growth with zones of inhibition 24.5, 20.5 and 17.0 mm, respectively. MIC and MBC of the component C were 62, 125 and 250 and 125, 250 and 500 μg/ml, respectively. This study confirmed that bioactive compounds of A. paniculatus root have antibacterial properties and support the use of this part of the plant as a traditional remedy for mouth and throat infections possibly caused by the test bacteria.

scholarly journals Syntheses of epoxides, and structural analysis of ( E ) N -hexyl-3-( trans -3-methyloxiran-2-yl)prop-2-enamide by spectroscopic techniques and DFT calculations

2018 ◽  
Vol 1165 ◽  
pp. 312-317 ◽  
Author(s):  
Alex R. Aguiar ◽  
Elson S. Alvarenga ◽  
Ramon P. Oliveira ◽  
Vania Maria T. Carneiro ◽  
Luciano G. Moura
Keyword(s):  
Structural Analysis ◽  
Dft Calculations ◽  
Spectroscopic Techniques

CHARACTERIZATION OF FIXED OIL FROM SEEDS OF MOMORDICA TUBEROSA (ROXB) COGN. (CUCURBITACEAE) FRUITS BY GC-MS

INDIAN DRUGS ◽  
2012 ◽  
Vol 49 (04) ◽  
pp. 39-42
Author(s):  
M. S Kale ◽  
◽  
K. S. Laddha
Keyword(s):  
Oleic Acid ◽  
Stearic Acid ◽  
Eleostearic Acid ◽  
Octadecenoic Acid ◽  
Acid Value ◽  
Octadecatrienoic Acid ◽  
Octadecanoic Acid ◽  
Hexadecanoic Acid ◽  
Saponification Value

Fixed oil obtained from the seeds of Momordica tuberosa (Roxb) Cogn. fruits (family: Cucurbitaceae) was analyzed using GC-MS. Five compounds, namely palmitic acid (hexadecanoic acid), oleic acid (9-octadecenoic acid), stearic acid (octadecanoic acid), ?-eleostearic acid (9, 11, 13-octadecatrienoic acid) and gama-linolenic acid (6, 9, 12-octadecatrienoic acid) were found to be major compounds in fixed oil obtained from the seeds of M. tuberosa fruits. Physical constants saponification value, unsaponifiable matter and acid value were found to be 182.4, 1.56% w/w and 11.44 respectively.

scholarly journals Comprehensive study on the degradation of ochratoxin A in water by spectroscopic techniques and DFT calculations

RSC Advances ◽  
2019 ◽  
Vol 9 (34) ◽  
pp. 19844-19854 ◽  
Author(s):  
Iris Cagnasso ◽  
Glauco Tonachini ◽  
Silvia Berto ◽  
Agnese Giacomino ◽  
Luisa Mandrile ◽  
...  
Keyword(s):  
Dft Calculations ◽  
Ochratoxin A ◽  
Lactone Ring ◽  
Degradation Process ◽  
Spectroscopic Techniques ◽  
Comprehensive Study

The OTA degradation process becomes irreversible only if, following hydrolyzation of the lactone ring, the molecule fragments.

Sign in / Sign up

Export Citation Format

Share Document