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Volume 8, No. 3, September 2013, Thu Al-Qadah 1434 H 

Articles

 

 

Emulsification Properties and Molecular Weight Distribution of Combretum Glutinosum Gum

The determination of weight average molecular weight (Mw) and radius of gyration (Rg) of Habeil gum was performed on a gel permeation chromatography-multi angle laser light scattering (GPC-MALLS) system. The results showed three main components of Combretum glutinosum gum designated arabinogalactan protein (AGP), arabinogalactan (AG) and glycoprotein (GP). The Mw of the freeze dried soluble part, freeze dried deacetylated gum, and freeze dried calcium-free gum were 2.06×106, 8.03×105, and 1.40×106 g /mol, respectively. The Mw of hydrophilic and hydrophobic components collected from soluble part gum are 3.16×106 and 6.08×105 g /mol, respectively, while the Mw of hydrophilic and hydrophobic components collected from deacetylated gum are 1.39×106 and 8.36×105 g /mol, respectively. Emulsification studies of the gum fractions showed lowest degree of span value than the starting material indicating good uniformity and increasing in adsorption of protein on oil droplet surface. The results of emulsion studies indicated that a blend of 50% w/w deacetylated Combretum glutinosum gum and 50% w/w Acacia Senegal produced better emulsification properties than the pure mother gum.

 

 

M.H. Awad*, E.A.Hassan, M.E. Osmon, Saphwan Alassaf, Glyn O. Phillips

JJC, 2013, 8(3), 139-151

Multiresidue Analysis of Pesticides in Agriculture Soil from Jordan Valley

A multiresidue analytical method using a gas chromatograph equipped with electron capture detector (GC/ECD) was optimized for the analysis of sixteen organochlorine, organophosphate, triazol, pyrethroid and dicarboximide pesticides (16-OCPs) in forty soil samples collected from Ghor Al Mazra`a and Ghor Al-Hadith in the southern Jordan valley region during the period from November 2011 to February 2012. The total concentrations of the studied 16-pesticides in all investigated soil samples ranged from 96.45 to 3129.81 µg/kg with an average value of 1178.41µg/kg. In the area under investigation cypermethrin was encountered most frequently while hexachlorobenzene was the least detected pesticide. The limit of detection (LOD) was ranged from 1.6-940.3 µg/L. The recovery rates were ranged from 70 to 129 %, with relative standard deviation (RSD %) values between 1.5 and 25%. The results of validation parameters verified that the experimental methodology was efficient and robust. The study concluded that mitigation measures concerning pesticide application to the land should be taken to decrease OCPs and other pesticides residues in order to improve the soil quality in the Jordan valley.

               

 

Mufeed Batarseh* and Rakan Tarawneh

JJC, 2013, 8(3), 152-168

Corrosion Control of Aluminium Alloy in Alkaline Solution Using Leave Extract of Plumbago Europaea

 The function of corrosion inhibition efficiency of plumbago europaea extract is due to the presence of complex organic matrix such as plumbagin (I) and isoshinanolone (II) as major constituents.

 

 

Tareq T. Bataineh, Mahmoud A. Al-Qudah, Nawafleh E, Abdulaziz.M.Ajlouni

JJC, 2013, 8(3), 169-178

Evaluation of Allergenic Metals and Other Trace Elements in Personal Care Products

In this work, a total of 135 personal care product samples that belong to seven different classes (Creams for face, body, and hands, Dried powder for face, Body lotion, Skin whitening creams, Sunscreens, Dead Sea black mud cosmetics, Lipsticks, and Eye shadows) were analyzed for their contents of 11 elements (Fe, Mn, Co, Cu, Cr, Ni, Zn, Se, Sr, Ba and Bi). The analysis has been conducted using ICP-AEOS following combinations of acid digestion. The mean concentrations of these elements in ppm (μg g-1)  were found to be in the following order: Fe (5.39×103) > Zn (4.92×103) > Mn (260.) > Ba (227) > Sr (103) > Bi (88.5) > Cu (58.6) > Cr (3.92) > Se (3.03) > Ni (2.49) > Co (0.520). These values are not expected to be toxic to humans. However, exposure over long periods might cause accumulation of the elements in the body and even at low concentration some metals could initiate allergic reactions. Among the known allergenic metals (Cu, Cr, Ni, and Co) Cu was detected in all the analyzed samples (100%) and Ni was detected in 92% of the samples. Of the 135 samples tested, 14.1% contained all four allergenic metals, and 14.8% contained both Co and Cr, which are known to work synergistically to cause allergy. At the above levels, these products are not expected to cause significant allergic effects.

 

 

Fuad A. Ababneh*,
Khaleel A. Abu-Sbeih and Idrees F.Al-Momani

JJC, 2013, 8(3), 179-190

Sodium Ascorbate as Green and Efficient Catalyst for Knoevenagel Condensation of Aryl Aldehydes with Meldrum’s Acid in Aqueous Media

 

 

Hamzeh Kiyani* and Fatemeh Ghorbani

JJC, 2013, 8(3), 191-198

In Silico Identification of Novel  Leukotriene A4 Hydrolase Inhibitors as Potential Anti-Inflammatory Agents

 

 

Qosay Al-Balas*, Mohammad Hassan, Nizar Mhaidat and Ammar Almaaytah

JJC, 2013, 8(3), 199-211