Vol. 8 & Issue 2 ; Section A : Chemical Sciences

Date : Feb .2018 to April 2018

 

Synthesis, characterization and catalytic activity of magnetic and fluorescent methylmethacrylate based random copolymer

S. Luna Eunice, B. Meenarathi, R. Anbarasan,

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No.2; 121-134.

[DOI: 10.24214/jcbps.A.8.2.12134.]

  • Abstract

    In the present investigation a novel magnetic and fluorescent random copolymer nanocomposite based on poly (methylmethacrylate) (PMMA) was synthesized by a three step process through an emulsion technique. Thus synthesized random copolymer nanocomposite is characterized by analytical techniques like FTIR and 1H-NMR spectra to confirm the chemical structure of the copolymeric materials. The DSC results declared that the Tg of the random copolymer nanocomposite increased by increasing the % weight loading of the magnetic fluorescent nanohybrid. The Mw of the nanocomposite increased due to the chemical grafting of magnetic nanohybrid onto the random copolymer backbone. Due to the encapsulation effect the magnetic moment value of the nanocomposite was found to be decreased. The catalytic activity of the random copolymer nanocomposite was tested towards the reduction of p-nitrophenol (NiP).

Synthesis, Characterization And Biological Studies of Schiff Bases Derived From Vanillin And Their Complexes With Cobalt (II).

Abduljleel Mohammed Abduljleel, Jasim Alshawi, Maitham Najim Aboud,

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No.2; 135-153.

[DOI: 10.24214/jcbps.A.8.2.13553.]

  • Abstract

    Three new Schiff base ligands derived from Vanillin and diamine compounds (ethane-1,2-diamine, propane-1,3-diamine, butane-1,4-diamine) have been synthesized. These ligands were treated with Co(II) chloride with a metal : ligand ratio equal to 1:1 to afford the three new complexes [CoL1(H2O)2]Cl2, [CoL2(H2O)2]Cl2 and [CoL3(H2O)2]Cl2. Ligands and complexes have been characterized by many techniques like IR, NMR, UV visible absorption, Atomic absorption, molar conductance, molecular weight determination and magnetic measurements. The data shows that the ligands are bidentate and linked to azomethine from nitrogen sites. The complexes are suggested as electrolytes paramagnetic compounds and the coordination number equal to four. The ligands and metal complexes were screened for their antimicrobial activities against gram positive bacteria and gram negative bacteria. They founded active biologically.

Regioselective synthesis and biological activity of novel β,β'-diaminoalcohols

Lassaad Wechtati , Ali Meznib, Moufida Romdhani Younes ,

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No.2; 154-164

[DOI: 10.24214/jcbps.A.8.2.015464.]

  • Abstract

    A highly effective and mild protocol for ring opening of epoxides with ethylenediamine in one step avoiding the use of expensive catalysts under solvent-free conditions is described. A variety of β,β'-diamino alcohols were obtained in high yields with excellent regiospecifity and in short reaction times. All the title compounds were screened for their antioxidant activity by β, β'-diaminoalcohols, hydroxyl radical, reducing power and ferrous ion chelating (FIC) methods and they showed promising antioxidant activity.

Identification of Polymers with Differential Scanning Calorimetry

Hemlata Raikwar and Anita Chouwey,

JCBPS; Section A; February 2018 – April 2018, Vol. 8, No. 2; 165-170.

[DOI: 10.24214/jcbps.A.8.2.016570.]

  • Abstract

    Differential Scanning Calorimetry, commonly known as DSC, is a thermo analytical technique for polymeric and non- metallic materials. There are many application of differential scanning calorimetry such as, Measurement of plastic or glassy material glass transition temperatures or softing temperatures, which change depend upon the temperature history of the polymers or the amount and type of fill material among other effect. Determines crystalline to amorphous transition temperatures in polymers and plastics and the energies for inorganic compound. Differential Scanning Calorimetric is one of the most efficient and cost effective polymer test methods available. Differential scanning calorimetric can be used to study the melting of a crystalline polymer or the glass transition.

Structures effects of two azo dyes associated with their antimicrobial activities

Hanan M. Ali, Hasanain A S. A Majeed, Ihsan A. Mkashaf Al-Asadi, Amel Salih Abdulredha, Ala`a A. Hussain,

JCBPS; Section A; February 2018 – April 2018, Vol. 8, No. 2; 171-185.

[DOI: 10.24214/jcbps.A.8.2.17185.]

  • Abstract

    Antimicrobial activity of two azo dyes, that contain 2-pyrimidinyl and 5-methyl-3-isoxazolyl were carried out against two bacterial species; Staphylococcus aureus (NCTC 6571), Escherichia coli (ATCC 25922) and fungus Candida albicans, using Agar-well diffusion method. The results were showed that the minimum concentration of each azo dye was inhibited Candida albicans and Staphylococcus aureus reasonably. But, the Escherichia coli were resistant against azo dye containing 2-pyrimidinyl. Theoretical studies were approved the structures of azo dyes and their fold a way same to that presents in biomolecules, and showed that the staggered and the eclipsed conformations are interconverted by the rotation about the C-C single bond with an energy variance. Therefore, the conformational analysis of each azo dye is affecting their internal coordinate mechanics (ICM). Add to which, the molecular mechanics (MM2) and molecular mechanics force field (MMFF94) were displayed that the molecular structures of the synthetic azo dyes are affecting their properties, binding and antimicrobial activities. Finally, the MM2 minimization was achieved efficiently with azo dye containing 2-pyrimidinyl better than that contain 5-methyl-3-isoxazolyl; the later had high steric effect. But, the MMFF94 minimization and MMFF94 minimization/ sampling of each azo dye were attended successfully.

Profiles of amino acid, fatty acid and nucleic acid in the edible muscles of important commercially crustaceans from Saudi Arabia

Hala Ali Abdel- Salam, Asmaa Mohamed Fawzy and Nora Hilal Al-Otaibi,

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No. 2; 186-198.

[DOI: 10.24214/jcbps.A.8.2.18698.]

  • Abstract

    The edible crustaceans; shrimps ( Penaeus semisulcatus ) and crabs (Portunus pelagicus) are valued commercial crustacean species in Saudi Arabia that are considered important components of the aquatic fauna in many areas of the world. Yet, they consumed by the local population as seafood products without knowing their nutritional quality. So, the present study quantified the concentration of amino acids, fatty acids and nucleic acids to evaluate the nutritive quality of these crustacean species which may be in the future used as nutritional supplements. The results of this study revealed that edible muscles of these marine crustaceans contain nutrients for human good health to prevent nutritional deficiencies and may be used in some pharmaceutical industries to help in treatment of some diseases. Considering the results obtained in the present study in light of nutritional point of view, male and female crabs (Portunus pelagicus) are possessing relatively high amounts of essential, non-essential amino acids, saturated, unsaturated fatty acids, RNA and DNA constituents and highly nutritious compared to both sexes of shrimp species. However, persons who suffer from coronary disease should be careful about the consumption of crab due to its high saturated fatty acids content.

The Effect of Dinitrosyl Iron Complexes in Free Radical Oxidation in Organs of Rats during Hypoxia Caused by Thermal Injury

Soloveva A.G., Dudar A.I., Kuznetsova V.L., Koryagin A.S.

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No. 2; 199-209.

[DOI: 10.24214/jcbps.A.8.2.19909.]

  • Abstract

    The aim of this work was to investigate the effect of deposited form of nitric oxide, dinitrosyl iron complexes (DNICs) on the processes of lipid peroxidation and the status of antioxidant system in the liver, kidney, heart and lung of rats with combined thermal injury. The experiment was conducted on 45white rats of Wistar line. Combined thermal trauma (contact burn on area of 20% of the body surface and termoinhalation impact) was applied under anesthesia. Animals with burn daily was injected intraperitoneally 10% solution of DNICs. The intensity of lipid peroxidation and total antioxidant activity, the specific activity of catalase, superoxide dismutase, concentration of malonic dialdehyde (MDA) were determined in homogenates of organs at days 3 and days 10 after burn. It was established that DNICs have pro - and antioxidant properties. The results showed that the introduction of dinitrosyl iron complexes to the rats with combined thermal trauma had a normalizing effect on the processes of lipid peroxidation in the lungs and heart. The deposited form of nitric oxide in the form of DNICs had caused a decrease of MDA level and intensity of lipid peroxidation in the liver on the day 10 after injury. A reduction of lipid peroxidation in the kidney in thermal injury under the influence of DNICs was revealed. The specific activity of superoxide dismutase and catalase on the day 10 after injury increased in the lung, heart and liver of rats under the influence of the deposited form of NO.

Analysis of Barrier Properties of Low Density Polyethylene films (LDPE) after addition of natural Polyphenolic extract

Shagufta Ishteyaque, Shahina Naz, Aziza Aftab, Arshad Faruqui and Asia Neelam,

JCBPS; Section A; February 2018 – April - 2018, Vol. 8, No. 2; 210-219.

[DOI: 10.24214/jcbps.A.8.2.21019.]

  • Abstract

    Packaging industry plays a vital role in Pakistan for safe transportation and handling of processed and unprocessed food items. Various types of packaging materials are available in the market but Plastic films are the most popular of material due to low cost of manufacturing and good barrier properties. The shelf life of various food items are dependent on the barrier properties of plastic film i-e Oxygen transmission rate (OTR) and WVTR(water vapor transmission rate).The usage of natural antioxidants(active packaging) in the packaging industry is one of the emerging technology . The usage of active packaging has resulted in a better shelf life and also environment friendly. The main objective of this work is to compare the barrier properties of Low Density Polyethylene (LDPE) films (with natural Polyphenols) with control Films .The LDPE granules containing different concentration of green tea(1% ,2% and 5%) extracts were extruded from the extrusion blown film machine. The results shows that LDPE pellets which contained high concentration of green tea extract(5%) had better barrier properties as compared to low concentration and control films