Day 3 :
- Inorganic Chemistry | Nuclear Chemistry
Chair
Sulaiman Al-Zuhair
UAE University, UAE
Session Introduction
Naghi Saadatjou
Semnan University, Iran
Title: The effect of hydrogen and chemical treatments of activated carbon in the synthesis of Ammonia on the promoted Ruthenium catalyst
Time : 10:00- 10:30
Biography:
Naghi Saadatjou has completed his PhD from University of Leeds (UK) and worked in Petro-Canada Lubricants R&D, Mississauga, Canada as a Research Chemist. He is now Senior Researcher, Professor of Applied Chemistry and Director of a research team focusing on Petrochemicals and Polymers at Semnan University and Petrochemical Research and Technology Company, Iran. He has published more than 50 papers in reputed journals and serving as an Editorial Board Member of some related journals.
Abstract:
In this work, the activated carbon without any treatment (AC), AC with hydrogen treatment at 900 °C for 24 h (ACH) and ACH with HNO3 treatment at 90 °C for 5h in the reflux system (ACHN) were used as a support for ruthenium catalyst. They were impregnated by RuCl3, Ba(NO3)2 and KOH solutions, then were reduced by H2 at 400°C for 4 h. They were used as ammonia synthesis catalyst. The physical and chemical properties of catalyst samples were characterized by applying nitrogen adsorption/desorption, TEM, SEM, EDS and XRD methods. The ammonia synthesis activity was evaluated in the fixed-bed reactor set-up under near-commercial operating conditions (that is, T: 400-450°C, P: 30 bar, H2/N2:3/1). It was found that the treatment of activated carbon support with hydrogen (ACH) and hydrogen/HNO3 (ACHN) significantly enhanced both activity and stability of catalysts although the textural properties little influenced. According to the support type, the order for both activity and stability was ACHN>ACH>AC. The best performance was obtained for K-Ba-Ru/ACHN sample due to the removal of chlorine and sulfur impurities and formation of oxygen-containing surface functional groups after hydrogen and HNO3 treatment of AC support that resulted to good dispersion of Ru and promoters. The reaction was found not to be intra-particle diffusion limited. A second order rate expression was proposed for deactivation kinetics of the catalysts and numerical values of 0.016 and 0.0018 h-1 were obtained for rate constant of deactivation of K-Ba-Ru/ACH and K-Ba-Ru/AC catalysts, respectively.
Shashi Bala Kalia
Himachal Pradesh University, India
Title: Catalytic, biological activity and thermal behaviour of triphenylphosphine capped zinc sulfide nanoparticles
Time : 10:30-11:00
Biography:
Shashi Bala Kalia has completed her PhD from Punjabi University, Patiala and worked as Post-doctoral Fellow at Himachal Pradesh University, Shimla. She is Chairperson of Chemistry at Department of Himachal Pradesh University, Shimla. She has published more than 60 papers in reputed journals of national and international repute.
Abstract:
Synthesis of ZnS nanoparticles in toluene solution using triphenylphosphine as capping agent has been carried out. EDAX analysis confirmed the composition of zinc sulfide nanoparticles. Field Emission Scanning Electron Microscope images revealed that zinc sulfide nanoparticles are of spherical shape. TEM study showed spherical mono dispersed particles ranging in size 13-19 nm. XRD spectrum peaks corresponding to (111) and (220) show that the zinc sulfide nanoparticles are crystalline in nature having zinc blende structure. FTIR spectroscopy shows the presence of triphenylphosphine as capping agent. Surface plasmon resonance peak at 293 nm in the UV spectrum indicates presence of zinc sulfide nanoparticles which correspond to band gap of 4.23 eV. Room temperature photoluminescence spectrum of the powder showed three peaks centred on 325 nm (3.81 eV), 397 nm (3.12 eV) and 425 nm (2.91 eV). Thermal behaviour of nanoparticles exhibited single step decomposition (84%) between 250oC to 350oC and ZnS as final residual product (16%). Degradation efficiency of the nanoparticles for dyes methyl orange, congo red and rodamine G6 after 3 h irradiation time was more than 90% thus acting as a highly efficient photocatalyst. Nanoparticles also exhibited antilipolytic activity. Antibacterial potential was studied on four bacterial strains, viz. Escherichia Coli, Pseudomonas aeruginosa, Staphylococcus aureus, and Staphylococcus mutans. For all the strains minimum inhibitory concentration (MIC) varied from 25 to 50 µg/ml.
Mehran Mirloei
University of Isfahan, Iran
Title: Rosmarinic acid, major polyphenol from Lemon balm (Melissa officinalis, L.) restrains non-enzymatic glycation of albumin
Time : 11:45-12:15
Biography:
Mehran Miroliaei is currently working as an Associate Professor Department of Biology, Faculty of Sciences, University of Isfahan, Iran.
Abstract:
Rosmarinic acid (RA) is a major component of medicinal plants such as Melissa officinalis. The present study demonstrates the protection of human serum albumin (HSA) from fructation at autoxidative and glycoxidation stage by (RA). Attenuation of Millard reaction measured by absorbance at the early stage of glycation, provided evidence for RA preventive role on HSA fructation. CD spectropolarimetry demonstrated that the transition of α to β conformer at the glycoxidation stage can be overcome by addition of RA. Moreover, fluorescent monitoring of advances glycation endproducts (AGE) formation at emission wavelength of 440 nm revealed that RA blocks the late stage of fructation. Amyloid conformers were found to be progressively generated during fructation as mesured by ThT fluorescence. Suppresion of conformational alterations induced by ROS production suggested that RA inhibits the formation of cross β-structures by modifying the transition of secondary and tertiary structures. The mechanism of RA action can be explained by the transistion metal ion chelating effect of RA in the oxidative reactions of AGE formation and/or by RA influence on the recations of dicarbonyl intermediates of AGE formation. The results indicate that the multi-target mode of RA action have promising potential for prevention of diabetic complications arising from HSA glyctation.
Birsen Demirata Ozturk
Istanbul Technical University, Turkey
Title: Detection and quantification of antibiotics residues in chicken meat by reversed-phase highperformance liquid chromatography
Time : 12:15-12:45
Biography:
Birsen Demirata Ozturk has obtained her PhD in 1986 and became Associate Professor in 1992 and full Professor in 2000 in the branch of Analytical Chemistry. Her research interest is in basic concepts of environmental and analytical chemistry and development of analytical methods for the spectrophotometric determination.
Abstract:
The purpose of this study is to analyze the effect of tetracycline and oxytetracycline antibiotics in chicken meat samples by High Performance Liquid Chromatography (HPLC) method. In addition, we will learn whether the antibiotic level is low according to MRL (maximum residue level) or not. In this study, penicillin G, tetracycline, oxytetracycline are chosen for their common objectionable usage in animals and for the difficulties in the procedure of analysis. We can find whether chickens were cut on time or not. The method involves the extraction of OTC from chicken meat and the determination by HPLC. Chicken meat which was purchased from different brand was analyzed by HPLC. We found different results according to chicken meat. We also found antibiotic residue in chicken which is fed in village. 37.6 μg of oxytetracycline residue was found in organic chicken. Normally tetracycline (TC) and oxytetracycline (OTC) levels in chicken breast won’t be above 100 μg per kg.
Suvarcha Chauhan
Himachal Pradesh University, India
Title: Conductometric and fluorescence probe analysis on molecular interactions between cationic surfactants in aqueous medium of glycyl dipeptide: Concentration and temperature effect
Time : 13:45-14:15
Biography:
Suvarcha Chauhan has completed her PhD in 1988 from Himachal Pradesh University, Shimla and worked as Post-doctoral Fellow at Department of Chemistry, Himachal Pradesh University, Shimla for 11 years and joined as Assistant Professor in the same department in 2001. She has published about 107 papers in reputed journals of national and international repute with 19 papers h-indexed and 46 papers i-10 indexed and has ~1200 citations to her credit.
Abstract:
The effect of cationic micelles of cetyltrimethylammonium bromide (CTAB) and dodecyltrimethylammonium bromide (DTAB) on interactions of glycyl dipeptide in aqueous medium have been studied in varying concentrations (0.001, 0.005 and 0.010 mol∙kg–1) at different temperatures (293.15 K to 293.15 K). The conductivity method is employed to determine critical micelle concentration, CMC i.e., point of aggregation and the results have been discussed in terms of glycylglycine–CTAB/DTAB hydrophobic and electrostatic interactions in aqueous medium. The obtained CMC values reveal the fact that the micellization tendency of the surfactant increases in the presence of glycyl dipeptide. The CMC’s of CTAB and DTAB have been found to decrease from 0.87 to 0.66 mmol∙kg–1 and 14.2 to 13.7 mmol∙kg–1 respectively as the [Glycyl dipeptide] increased from 0.001 to 0.01 mmol∙kg–1. The temperature dependence of the CMC values has been established in terms of ion–ion, ion–polar and hydrophobic–hydrophobic group interactions around the hydrophobic part of surfactants. Furthermore, the standard thermodynamic parameters of micellization have been evaluated and interpreted which enable to grasp fully the ion–ion/ion–hydrophilic interactions existing in the present ternary (surfactant–dipeptide–water) system. In addition, the pyrene fluorescence study has been used to study the change of micropolarity produced by the interactions of surfactants with glycyl dipeptide and the aggregation behaviour (CMC determination) of surfactants.
Dilek Ozyurt
Istanbul Technical University, Turkey
Title: HPLC–UV method development and validation for the determination of low level formaldehyde grown culture mushrooms in Turkey
Time : 14:15-14:45
Biography:
Dilek Ozyurt has completed her PhD from Istanbul Technical University in 2014 and received best PhD thesis award. She is a Research Chemist in the same university. Her research subject is determination of antioxidants method. She has published 14 papers in international journals.
Abstract:
Mushrooms are important nutritional source for people health. 73% of people consume mushroom in Turkey. Under favor of, climate and soil conditions, many of the mushroom kinds grow up in Turkey. Formaldehyde is used in some processes of mushroom agriculture and harvesting. These processes are incubation, sterilization of cover soil and reusage preparation processes of compost soil. Formaldehyde is colorless and burnable gas. International Agency on Cancer (IARC) categorizes formaldehyde as a group carcinogenic matter. In this work, formaldehyde amount analyzed by HPLC, originated from mushroom consumption. After the preparation of different concentrations formaldehyde solutions, calibration curve was created. Extract of muddy and clean mushrooms and washing water of mushrooms injected to HPLC with 2,4-Dinitrophenilhydrazin (DNPH) derivation. The amount of formaldehyde in samples calculated with using linear calibration graph and peak areas. After the calculations, the maximum concentration is 0.981±0.012 mg formaldehyde kg-1 wet mushroom and the minimum concentration is 0.309±0.017 mg formaldehyde kg-1 wet mushroom. Experimental outcomes compared with literature data and it shows they behave similar.
Mohammed Moayyad Shukr
University of Salahaddin, Iraq
Title: Determination of some heavy metals in blood serum of pregnant women who induced miscarriage using ICP technique
Time : 14:45-15:15
Biography:
My name Mohammed; I finished my B.Sc. degree at the age of 23 years from University of Salahaddin / College of Science / Department of Chemistry and my M.Sc. degree at the age of 29 at same university and same department. Now I am working as Chemist at clinical laboratory.
Abstract:
Introduction: Inductively coupled plasma - optical emission spectrometry (ICP – OES) is a powerful tool for the determination of metals in a variety of different sample matrices (1). Abortion is defined as the termination of a pregnancy resulting in or closely followed by the death of the embryo or fetus (2). It also called miscarriage which is the loss of the pregnancy prior to viability (before 22 weeks of pregnancy or less than 500 g) (3). Aim: The aim of this study was to determine the concentration levels of (arsenic, calcium and manganese) in blood serum of women who induced miscarriage in their first trimester (first 14 weeks of gestation) and healthy pregnant women with no history of miscarriage as control. Material and methods: Serum concentrations of heavy metals like (arsenic, calcium and manganese) were assayed using (ICP – OES) technique in (n = 50) patients (women who induced miscarriage) and (n = 15) healthy pregnant women (control). Results: Results were expressed as (Mean ± S.E.M.), the results showed that mean serum concentration levels of arsenic, calcium and manganese in patients were (0.0569 ± 0.0002), (5.547 ± 0.1033) and (0.0762 ± 0.00023) mg L-1 respectively, while in controls were (0.0371 ± 0.0009), (8.415 ± 0.1215) and (0.0783 ± 0.00025) mg L-1 respectively. Differences in serum arsenic, calcium and manganese between patients and controls were highly significant, (P value < 0.0001). Conclusion: The study showed that there was a highly significant reduction in serum levels of calcium and manganese in patients as compared to control group, while there was a highly significant increase in serum levels of arsenic in patients as compared to control group.