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Volume 11, No. 2, June 2016, Ramadan  1437 H

Articles

 

 

Green Synthesis of Biscoumarins Using Phthalimide-N-sulfonic Acid

 

Hamzeh Kiyani

Hassan Darbandi

Mohsen Tazari

 

JJC, 2016, 11(2), 77-84

Synthesis and Spectroscopic Characterization of Tris(hydroxymethyl)aminomethane Proton Transfer Complexes with Acidic π-Acceptors

Two charge transfer complexes based on an organic basic donor, tris(hydroxymethyl)-aminomethane (Tris), and two π-acceptors having acidic protons, picric acid (PA) and chloroanilic acid (CA), were synthesized for the first time. Some physicochemical analyses including UV-Vis, FT-IR and 1H-NMR were employed to investigate and confirm the proposed chemical structures of the prepared complexes. It was found that the donor–acceptor molar ratio is 1:1 for Tris:PA and 1:2 for Tris:CA charge transfer complexes. The formed charge transfer complexes have –NH3+ and –OH2+ ions as a result of proton transfer from acidic to basic centers. The formation constant (KCT) and molar absorptivity coefficient (eCT) were calculated from the experimental spectroscopic data. Thermodynamic studies for both charge transfer complexes showed the favorability of the complex formation.             

 

Mahmoud Salman

Ayman A. Issa

Ibrahim Sarairah

Abdel Aziz Abu-Yamin

 

JJC, 2016, 11(2), 85-98

Chemical Composition of Essential Oil of Jordanian Scabiosa prolifera at Different Flowering Stages

The essential oil chemical composition of fresh and air-dried aerial parts of the Scabiosa prolifera (Dipsacaceae Family) was analyzed using gas chromatography (GC) and gas chromatography-mass spectrometry (GC-MS) at both the pre-flowering and flowering stages. Forty-nine compounds were identified. In the fresh pre-flowering oil, E-salvene (54.90%), α- picoline (20.98%) and ethyl isovalerate (18.32%) were found to be the main components. In the dried pre-flowering oil, ethyl isovalerate (37.84%), 3,7-dimethyl-1,6-octadiene (9.61%) and myrtenal (7.60%) were the major components. On the other hand, the major constituents identified in the fresh flowering oil were ethyl isovalerate (59.57%), E-salvene (24.78%) and α- picoline (4.43%), whereas the dried flowering oil contained ethyl isovalerate (48.87%) as major component, in addition to α-thujone (8.10%), 3-para-menthene (6.10%), α-picoline (5.86%) and myrtenal (5.17%). 

 

Mahmoud A. Al-Qudah

Noor K. Otoom

Hala I. Al-Jaber

Hasan I. Tashtoush

Abdulraouf S. Mayyas

Ibrahim N. Trawenh

Jamil N. Lahham

Sultan T. Abu Orabi

 

JJC, 2016, 11(2), 99-107

Salvia ceratophylla from Jordan: Volatile Organic Compounds, Essential oil composition and antioxidant activity

Salvia ceratophylla growing wild in Jordan was investigated for its hydro-distilled oil and volatile organic compounds (VOC’s extracted by SPME) composition using Gas Chromatograph – Mass Spectrometry method. In addition, the antioxidant activity of the hydro-alcoholic extract obtained from the aerial flowering parts of S. ceratophylla was determined using the DPPH ABTS•+ methods.

 

 

Hala I. Al Jaber

JJC, 2016, 11(2), 108-119

Phytonutrient Contents of Opuntia ficus indica L. Stem grown in Nigeria

 

Kabir O. Otun

Temitope A. Yekeen

Temitope A. Ajibola

Muibat O. Bello

 

 

JJC, 2016, 11(2), 120-127

Sorption of 4-Nitroaniline on Activated Kaolinitic Clay and Jatropha curcas Activated Carbon in Aqueous Solution

 

 

Samsudeen O. Azeez

Folahan A. Adekola

 

JJC, 2016, 11(2), 128-145