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Volume 5, No. 1, March 2010, Rabia 1 1431 H

Articles

 

 

Neat Reaction Technology and Conventional Method for the
Synthesis of 4-Oxo-Thiazolidines and their 5-Arylidene Derivatives and its Antimicrobial Activity

Several new 4-oxo-thiazolidines and its arylidene derivatives were synthesized by both conventional as well as microwave irradiation technique and evaluated for their antibacterial and antifungal activity.

 

Apoorva Upadhyay*, S.K. Srivastava and S.D. Srivastava

 JJC, 2010, 5(1), 1-11

Synthetic Study of Ethyl (2E)-4-bromo-3-ethoxybut-2-enoate: Synthesis of New 1,4-Benzoxazines and Pyrrole-2-ones

Ethyl (2E)-4-bromo-3-ethoxybut-2-enoate (2) and ethyl (2E)-3-ethoxy-4-(2- and 4-nitrophenoxy)but-2-enoates  (4 and 5) have been synthesized and used as synthones for the preparation of some new ethyl (2Z)-2H-1,4-benzoxazin-3(4H)-ylideneacetate (6), 1-(substituted phenyl)-4-hydroxy-1,5-dihydro-2H-pyrrol-2-ones (9) and 4-ethoxy-1-(4-bromophenyl)-1,5-dihydro-2H-pyrrole-2-ones (11). 

 

Maysoon M. Al-Kiswani, Mikdad T. Ayoub* and Mohammad S. Mubarak*

JJC, 2010, 5(1), 13-21

Synthesis and Antibacterial Activity Study of
2-[(2,6 -dichlorophenyl amino)-phenyl]-acetic acid Derivatives
with Various Sulfonamides

Various 30 sulfonamides of 2-[(2,6-dichlorophenylamino)-phenyl]-acetic acid  have been prepared and studied the antibacterial activity on both Gram positive S. aureus, B. subtilis and Gram negative E. coli, P. vulgaris bacteria;  compared with standard drugs penicillin, chloramphenicol and ampicillin.

 

 

Patel Navin B.*, Patel Jignesh N., Lilakar Jaydeep D.

JJC, 2010, 5(1), 23-32

Preparation of Ordered Mesoporous W/MCM-41 and its Catalytic Performance in Oxidative Desulfurization of Dibenzothiophene

Highly ordered mesoporous catalyst W/MCM-41 with different tungsten loadings (5, 10 and 15 wt. %) was prepared via impregnation method using dilute sulfuric acid. The catalyst was characterized by different analytical techniques. The results indicate that tungsten was introduced successfully into MCM-41 without changing its morphology even at high loading contents. Catalyzed oxidative desulfurization (ODS) of dibenzothiophene was investigated and the activity of the synthesized materials was found to be significant.

 

Zaki Eldin Ali Abdalla*, Baoshan Li*, Chunying Han, Bakheit Mustafa

JJC, 2010, 5(1), 33-45

Liquid-Phase Hydrogenation of Cinnamaldehyde Over Ir Catalysts:
A Kinetic Modeling Study

The kinetic parameters of the liquid phase hydrogenation of cinnamaldehyde over alumina supported Ir catalysts investigated under mild conditions were determined. The data could be successfully modeled based on the assumption that the Langmuir-Hinshelwood surface reaction between competitively adsorbed cinnamaldehyde and hydrogen is the rate determining step.

 

 

Suhair Abu Al-Foul, Sabri Mahmoud, Riyadh Saymeh and Ayman Hammoudeh*

JJC, 2010, 5(1), 47-58

Some Natural Additives as Corrosion Inhibitors for
Zinc in Acetic Acid Media

The inhibition effect of some plant extracts, namely Vulgaris Thymus (VT), Cuminum Cyminum, (CC), Hibiscus Subdariffa (HS), Feungreek Seeds(FS) on the corrosion of zinc in 2M CH3COOH solution has been investigated using weight loss , pH measurement and electrochemical measurements. The percentage inhibition efficiency was found to increase with increasing concentration of inhibitor and with decreasing temperature. The adsorption of these inhibitors on the zinc surface obeys Langmuir isotherm. Some activated thermodynamic parameters were calculated. The variation of the open circuit potential of zinc electrode with time in 2M CH3COOH shows that Ecorr  is shifted with time in the cathodic direction, i.e. to more negative values before return to the positive direction attainment quaisteady states.  But the addition of these extract,  the potential is shifted initially to more positive values then returned to negative values with time by increasing concentration of the additive extracts is recorded in comparison with blank.

 

 

H.J. Y.  El- Aila*, N.H. Amin, H.M. Tamouse, M.A. El- Jboour

JJC, 2010, 5(1), 59-73

Application of XRF, AAS and BCR-Sequential Extraction Procedure for Characterization and Assessment of Metals in Sewage Sludges from Two Treatment Plants in Jordan

 This study was performed to characterize and determine the heavy metal contents in sewage sludge from two different wastewater treatment plants in Jordan using three stage BCR(Community Bearue of reference) sequential extraction procedure. The extracts were analyzed for determining Cd, Co, Cr, Fe, Mn, Ni, Pb, and Zn using flame atomic absorption spectrometry. Microwave digestion procedure was used to investigate the total contents of heavy metals.

 

 

Waleed A. Manasreh

JJC, 2010, 5(1), 75-83

Disinfection Efficiency and Formation of Disinfection Byproducts in Jordanian Drinking Water Treated with Chlorine Dioxide

In this study factors affecting disinfection efficiency and formation of disinfection byproducts (DBPs) in water treated with chlorine dioxide (ClO2) were investigated. The amount of trihalomethanes THM and haloacetic acids HAA and chlorite ion was determined in samples collected from three different sources in Jordan: Deir Alla surface water, Wadi Al Sir springs, and Yajooz spring. The amounts of THM and HAA in real treatment plants were determined. Focus on chlorite ion as a major DBP in ClO2 treatment was made to investigate the factor that affects its concentration. This study aims also to identify new DBPs associated with ClO2 disinfection. Results show that chlorite ion has its highest formation at higher ClO2 dose, TOC, pH and temperature. Analysis of real samples shows that using ClO2 for disinfection leads to formation of smaller amounts of THM and HAA compared to chlorine gas. Among the three investigated water sources in Jordan, Deir Alla water was found to have the highest formation of DBPs upon treatment with ClO2. New DBPs were identified for the first time in water treated with ClO2 including some halogenated compounds, carboxylic acids and some aldehydes and ketones. Disinfection efficiency of ClO2 was found to increase by increasing ClO2. Disinfection efficiency was found to be the lowest at temperature of 30oC and pH= 7, deviation from these values result in an increase in the efficiency of disinfection.

 

 

Reham M. Abu Shmeis, Manar K. Fayyad, Mahmoud A. Alawi*

JJC, 2010, 5(1), 85-99

New Extractive Spectrophotometric Methods for the
Determination of Olanzapine in Pharmaceutical Formulations
Using Bromocresol Green

 Two new spectrophotometric methods have been developed and validated for the assay of olanzapine (OLP) in bulk and in pharmaceuticals. The first method (method A) is based on the formation of yellow ion-pair complex between the OLP and bromocresol green (BCG) at pH 5.50 0.10. The ion-pair complex formed was extracted with dichloromethane and the absorbance was measured at 410 nm (0.25-12.50 g/mL OLP). The second method (method B) is based on the breaking of the yellow OLP-BCG ion-pair complex in alkaline medium followed by the measurement of the blue color of the dye at 620 nm (0.2-5.0 g/mL OLP).

 

 

Kanakapura Basavaiah*, Sameer A. M. Abdulrahman and Kanakapura B. Vinay

JJC, 2010, 5(1), 101-117