IJASR Volume 6 – Issue 4 , November -December 2018 Edition
All listed papers are published after full consent of respective author or co-author(s).
For any discussion on research subject or research matter, the reader should directly contact to undersigned authors.
Epoxidation and Acrylation of Syrian Cottonseeds oil
Najwa Meftah, Nidal Rajeh, Malki Saour
Abstract: Epoxidized vegetable oils are promising candidates as a substitute for petroleum oil based plasticizer, lubricants and adhesives. Chemical modification of fatty acid chain of triglyceride appears to be one route towards this objective substitution of petroleum product. In this study, the epoxidation of cottonseeds oil has been carried out via catalytic acidic ion exchange resin method using 30% hydrogen peroxide as oxygen donor and acetic acid as oxygen carrier in presence of sulphuric acid as a catalyst. Further, an epoxy acrylate resin was synthesized from the epoxidized cottonseeds oil (ECSO) by using methylmethacrylate monomer, and triethylamine as a catalyst, and hydroquinone as an inhibitor respectively.The acrylation of epoxidized cottonseeds oil (MMAECSO) is done by introducing methylmethacrylate, which is an unsaturated monomer into oxirane groups of the epoxidized oil (ECSO).This reaction was confirmed by analytical data in terms of Acid Value, Iodine Value, Oxiran content %, Viscosity, Differential Scanning Calorimetry (DSC), Scanning Electron Microscope (SEM), and spectral analysis (FTIR).
[Download] pp 1-15
Synthesis, Characterization of New Azo Compounds and Their Biological Evaluation
Abstract: This paper presents the synthesis and characterization of new azo dyes derived from coumarin obtained. These dyes were obtained by the coupling of coumarin with the diazotized aromatic amines: 4-nitroaniline, 4-chloraniline,4-bromoaniline. There action yields were between 64%-79%. The proposed structures of the dyes were confirmed and characterized by using infrared spectroscopy IR and high performance liquid chromatography connected with mass spectrometry detector HPLC / MS detector. The obtained dyes showed an orange color and evaluated in vitro for their anticoagulants activities by measuring the prothrombin time (PT) and Thromboplastin time (APTT). PT and APTT assays were carried out citrated plasma of healthy volunteer donors with different concentration of the synthesized compound. It was noted that the azo 4-hydroxy coumarin containing Nitroaniline was posses high activity as anticoagulants compared to other prepared compounds
[Download] pp 16-24
Obesity Among Middle Eastern Women: A Literature Review
ABSTRACT: Obesity is growing at an alarming rate around the world with a tremendous increase in the Middle East. The author completes an in-depth review of the available literature, reporting that the prevalence of obesity among women in the Middle East ranges between 13% and 50%. Primary prevention strategies and culturally-appropriate programs are recommended to combat the obesity pandemic among women in the Middle East.
[Download] pp 25-32
Phytochemical Screening and Anti-Obesity Activity of Salvia Officinalis L.
Abstract: Phytochemical screening of leaves of Salvia Officinalis L., have been determined, and the results showed that the leaves of Salvia Officinalis L. contained the following compounds:phenols,steroids,terpenoids, carbohydrates, flavonoids, , tannins, and glycosides. While it has shown the absence of alkaloids and Cardinols, , the total antioxidants, phenols ,and flavonoids were determined by using different solvents (MeOH; MeOH70%;EtOH; EtOH70%) by spectrophotometer. The results show that methanolic 70% extract has the highest content of total antioxidants and total flavonoids ,whereas the methanolic extract has the highest content of total phenols.The anti-obesity activity effect of Salvia OfficinalisL.were screened by studied the inhibition lipase and α –amylase activity by used different extracts[MeOH; MeOH 70% EtOH ; EtOH70%].The results showed that the highest effect on lipase activity was in the MeOH extracts but the highest effect onα –amylase activity was in the MeOH 70% extracts.
[Download] pp 33-45