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waheedjj's picture

Synthesis of Novel Biologically Active Mono Acid Esters Derived From The Constituents of Urtica Pilulifera

Sun, 2014-12-28 09:53 — Dr. Waheed J. Jondi
Journal Title, Volume, Page: 
Iranian journal of pharmaceutical research (IJPR) 01/2013; DOI:ID: 5287-IJPR
Year of Publication: 
2014
Link: 
http://ijpr.sbmu.ac.ir/index.php/jddt/article/download/274/journal/journal/artic...
Authors: 
Ahmad Husein
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Waheed Jondi
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Current Affiliation: 
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
[email protected]
Mohammed Ali-Shtayeh
Department of Biology and Biotechnology, Faculty of Science, An-Najah National University, Nablus, Palestine
Nidal A. Zatar
Department of Chemistry, Faculty of Science, An-Najah National University, Nablus, Palestine
Preferred Abstract (Original): 

New mono acid esters have been synthesized from the reaction of benzoic acid and mono-hydroxybenzoic acids with 2-phenoxyethanol separated from Urtica pilulifera, characterized, and screened for possible antioxidant, antifungal, antimicrobial and anticancer activities. 2-phenoxyethyl 4-hydroxy benzoate showed considerable activity against MCF-7 with IC50 is less than 62.5 µg/ml, and complete inhibition at a concentration less than 37.5 µg/ml against M. canis and less than 50 µg/ml against T. rubrum. On the other hand 2-phenoxyethyl 2-hydroxy benzoate reveals 70% of gentamicin against K. pneumoniae.

MSShtayeh's picture

Synthesis of Novel Biologically Active Mono Acid Esters Derived From The Constituents of Urtica Pilulifera

Wed, 2014-02-19 14:17 — Mohammed Saleem Ali-Shtayeh
Journal Title, Volume, Page: 
Iranian journal of pharmaceutical research (IJPR) 01/2013; DOI:ID: 5287-IJPR
Year of Publication: 
2013
Authors: 
Ahmad Husein
Waheed Jondi
Mohammed Ali-Shtayeh
Current Affiliation: 
Department of Biology and Biotechnology, Faculty of Science, An-Najah National University, Nablus, Palestine
[email protected]
Nidal Zatar
Preferred Abstract (Original): 

New mono acid esters have been synthesized from the reaction of benzoic acid and mono-hydroxybenzoic acids with 2-phenoxyethanol separated from Urtica pilulifera, characterized, and screened for possible antioxidant, antifungal, antimicrobial and anticancer activities. 2-phenoxyethyl 4-hydroxy benzoate showed considerable activity against MCF-7 with IC50 is less than 62.5 µg/ml, and complete inhibition at a concentration less than 37.5 µg/ml against M. canis and less than 50 µg/ml against T. rubrum. On the other hand 2-phenoxyethyl 2-hydroxy benzoate reveals 70% of gentamicin against K. pneumoniae.

elhamouz's picture

Dye-effect in TiO2 catalyzed contaminant photo-degradation: Sensitization vs. charge-transfer formalism

Sat, 2013-06-01 13:31 — Amer M EL-Hamouz
Journal Title, Volume, Page: 
Solid State Sciencesو Volume 9, Issue 1, Pages 9–15
Year of Publication: 
2007
Link: 
http://www.sciencedirect.com/science/article/pii/S1293255806002391
Authors: 
H.S. Hilal
Department of Chemistry, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
L.Z. Majjad
Department of Chemistry, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
N. Zaatar
Department of Chemistry, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
A. El-Hamouz
Department of Chemical Engineering, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
Current Affiliation: 
Department of Chemical Engineering, An-Najah National University, Nablus, Palestine
[email protected]
Preferred Abstract (Original): 
Anatase TiO2 surfaces have been treated with 2,4,6-triphenylpyrilium hydrogen sulfate (TPPHS) dye to yield the modified TiO2/TPPHS surface. The modified TiO2/TPPHS surface was then supported onto activated carbon (AC) surfaces to yield a new class of catalytic system AC/TiO2/TPPHS. The catalytic activities of naked TiO2, TPPHS solution, TiO2/TPPHS and AC/TiO2/TPPHS systems were examined in photo-degradation of phenol and benzoic acid in water, using both UV and visible regions. All studied systems showed low catalytic activity when used in the visible region. In UV, the AC/TiO2/TPPHS showed highest activity, whereas the naked TiO2 and TPPHS solutions were the least active systems. The dye role, in enhancing activity of modified surfaces in UV degradation of contaminants, is understandable by a charge-transfer catalytic effect rather than a sensitizing effect. AC role is explainable by its ability to adsorb contaminant molecules and bringing them closer to catalytic sites.

Full Text

Nidal Zatar's picture

Dye-effect in TiO2 catalyzed contaminant photo-degradation: Sensitization vs. charge- transfer formalism

Thu, 2013-02-28 14:04 — Nidal Zatar
Journal Title, Volume, Page: 
Science Direct, Solide state science 9 (2007) 9-15.
Year of Publication: 
2007
Link: 
http://www.sciencedirect.com/science/article/pii/S1293255806002391
Authors: 
N. Zatar
Department of Chemistry, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
Current Affiliation: 
Department of Chemistry, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
[email protected]
H.S. Hilal
Department of Chemistry, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
L.Z. Majjad
Department of Chemistry, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
A. El-Hamouz
Department of Chemical Engineering, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
Preferred Abstract (Original): 

Anatase TiO2 surfaces have been treated with 2,4,6-triphenylpyrilium hydrogen sulfate (TPPHS) dye to yield the modified TiO2/TPPHS surface. The modified TiO2/TPPHS surface was then supported onto activated carbon (AC) surfaces to yield a new class of catalytic system AC/TiO2/TPPHS. The catalytic activities of naked TiO2, TPPHS solution, TiO2/TPPHS and AC/TiO2/TPPHS systems were examined in photo-degradation of phenol and benzoic acid in water, using both UV and visible regions. All studied systems showed low catalytic activity when used in the visible region. In UV, the AC/TiO2/TPPHS showed highest activity, whereas the naked TiO2 and TPPHS solutions were the least active systems. The dye role, in enhancing activity of modified surfaces in UV degradation of contaminants, is understandable by a charge-transfer catalytic effect rather than a sensitizing effect. AC role is explainable by its ability to adsorb contaminant molecules and bringing them closer to catalytic sites.

Full Text

Hikmat S. Hilal's picture

Dye-Effect in Tio2 Catalyzed Contaminant Photodegradation: Sensitization Vs. Charge-Transfer Formalism

Wed, 2010-04-21 14:32 — Hikmat S. Hilal, D.Sc.
Journal Title, Volume, Page: 
Solid State Sciences Volume: 9, Issue:1, January 2007, Pages: 9-15
Year of Publication: 
2007
Link: 
http://www.sciencedirect.com/science/article/pii/S1293255806002391
Authors: 
H.S. Hilal
Department of Chemistry, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
Current Affiliation: 
Department Of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine
[email protected]
L.Z. Majjad
N. Zaatar
Department Of Chemistry, An-Najah N. University, Nablus, PO Box 7, West Bank, Palestine
A. El-Hamouz
Department Of Chemical Engineering, An-Najah N. University, PO Box 7, University Street, Nablus, West Bank, Palestine
Preferred Abstract (Original): 

Anatase TiO2 surfaces have been treated with 2,4,6-triphenylpyrilium hydrogen sulfate (TPPHS) dye to yield the modified TiO2/TPPHS surface. The modified TiO2/TPPHS surface was then supported onto activated carbon (AC) surfaces to yield a new class of catalytic system AC/TiO2/TPPHS. The catalytic activities of naked TiO2, TPPHS solution, TiO2/TPPHS and AC/TiO2/TPPHS systems were examined in photo-degradation of phenol and benzoic acid in water, using both UV and visible regions. All studied systems showed low catalytic activity when used in the visible region. In UV, the AC/TiO2/TPPHS showed highest activity, whereas the naked TiO2 and TPPHS solutions were the least active systems. The dye role, in enhancing activity of modified surfaces in UV degradation of contaminants, is understandable by a charge-transfer catalytic effect rather than a sensitizing effect. AC role is explainable by its ability to adsorb contaminant molecules and bringing them closer to catalytic sites.

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