Papers by Isam Y . Qudsieh
Journal of the American Oil Chemists' Society, Jun 10, 2011
IIUM Engineering Journal, Sep 29, 2010
AIP Conference Proceedings, 2009
Carbon nanotubes (CNTs) have been synthesized by a gas phase double stage chemical vapor depositi... more Carbon nanotubes (CNTs) have been synthesized by a gas phase double stage chemical vapor deposition (DS-CVD) technique using acetylene (C2H2) and hydrogen (H2) as precursor gases. The morphology and the structure of CNTs were characterized using field emission scanning electron microscope (FSEM) and transmission electron microscope (TEM). The CNTs produced were purified and functionalized by using covalent functionalization methods. The
Journal of Applied Sciences, Oct 15, 2010
Introduction: Polymer reinforced with Carbon Nanotubes and Nanoclay are receiving research attent... more Introduction: Polymer reinforced with Carbon Nanotubes and Nanoclay are receiving research attention for various industrial applications such as automobile interior and exterior accessories, air and space craft, electronics, civil constructions and fabrications of process vessels Problem Statement: Current researches have shown that the thermoplastic-clay nanocomposites have failed to live up to the earlier predictions albeit they have found some niche area of applications. This research work therefore aimed at studying the effect of carbon nanotube as secondary filler on the mechanical properties of polypropylene-clay nanocomposite. Approach: Hybrid polypropylene-clay nanocomposite was prepared in the presence of multiwall carbon nanotubes (MWCNTs) as secondary additives using melt intercalation process. ..
Kh alid G. Fan d i, Is am Y. Qu d s ieh , Su ley man A. M u y ib i, M u h an n ad M as s ad eh : ... more Kh alid G. Fan d i, Is am Y. Qu d s ieh , Su ley man A. M u y ib i, M u h an n ad M as s ad eh : W ater Po llutio n Statu s A s s es s men t o f Kin g Talal Dam, Jo rd an :
Biochemical Engineering Journal, Sep 1, 2009
Bioconversion of oil palm lignocellulosic biomass in the form of empty fruit bunches (EFB) as the... more Bioconversion of oil palm lignocellulosic biomass in the form of empty fruit bunches (EFB) as the major substrate into cellulase enzyme was studied in the laboratory. A fungal strain, Trichoderma harzianum T2008 was used to evaluate the solid state bioconversion of EFB for cellulase production. The study was conducted in two systems: an Erlenmeyer flask (EF, 500 mL) and a horizontal rotary drum bioreactor (RDB, 50 L), designed and fabricated locally. The highest cellulase activity on the fourth day of fermentation in the EF was 8.2 filter paper activity (FPA)/gram dry solids (gds) of EFB, while its activity from the RDB was 10.1 FPA/gds on the second day of fermentation. Glucosamine, reducing sugar and pH were also determined to evaluate the substrate uptake and growth conditions during the entire fermentation period.
Zenodo (CERN European Organization for Nuclear Research), Jan 24, 2022
Today, many therapy drugs have been used to treat cancer patients. However, those drugs are not e... more Today, many therapy drugs have been used to treat cancer patients. However, those drugs are not effective enough and usually have adverse side effects on human health. Different herbal medicine is rising in popularity because it is more compatible with the human body and has fewer side effects. Even while alternative herbal remedies effectively decrease symptoms in traditional medicine, many of them have yet to be scientifically proven. As a result, it's critical to keep looking for ways to recover its efficiency against cancer cells. Acacia seyal gum (ASG), known as Arabic gum, is a well-known traditional medicinal therapy with various restorative characteristics. In this study, the yield of ASG extract was optimized using experimental design followed by chemical characterization of a bioactive compound for the last yield, then the therapeutic potential of ASG crude extracts against leukemia cancer cells was investigated in vitro. The Raman Spectroscopy (RS), Fourier Transform Infrared (FTIR) Spectroscopy, and GC-TOFMS analyses were used to characterize ASG crude hydroethanolic extract bioactive components. The anti-leukemic activity of ASG crude extracts was investigated in vitro against tumoral Jurkat T-cell ALL, and K562 leukemia cancer cell lines, as well as nontumoral WIL2NS cells. The optimum extraction conditions resulted in a yield of 75.89% after 45 min of extraction at temperature 40 °C and solid/liquid ratio of 1:25 g/ml. The cytotoxicity assays of ASG and Taxol revealed that both treatments inhibited the growth of K562 and Jurkat T cancer cells and exhibited the lowest IC50 for K562 and Jurkat T cancer cell (IC50=10 g/ml and IC50=5.11 g/ml, respectively), and a negligible inhibition effect for WIL2NS cells (IC50=80 g/ml).
Natural Products: An Indian Journal, 2011
Activated Carbons (ACs) are widely used as adsorbents for purification, separation and recovery p... more Activated Carbons (ACs) are widely used as adsorbents for purification, separation and recovery purposes. The potential of AC in the removal of heavymetals such as Lead, Cadmium, Cobalt and Iron fromindustrial effluents is currently receiving a global attention without much consideration for the characterization and synthesis method due to their high adsorptive power. Empty Fruit Bunches (EFBs) contribute a greater percentage of solid waste and consequently become an environmental problem in palm oil producing area. These Empty Fruit Bunches tested positive as a potential rawmaterials forAC production. However, the best productionmethod is not yet established. Various methods of activated carbon production and the effect of these methods on agriculturalwaste specifically EFB were understudied in this article. Suggestions were made based on the identified problems and finally, Empty Fruit Bunch is recommended for use in the production of activated carbon to reduce its effect as environmental pollutants.
This research project intended to study the performance of chitosan as flocculating agent for rem... more This research project intended to study the performance of chitosan as flocculating agent for removal heavy metal (zinc) from artificial water. Chitosan was used due to its special characteristics such as non-toxic, hydrophilic, biodegradable, biocompatible, and anti-bacterial, biopolymer and very good adsorption of heavy metal which has led to a very diverse range of its applications. The presence of a large number of amine groups on the chitosan chain increases it adsorption capacity. The effect of contact time, dosage of chitosan, agitation speed and pH were observed for optimal absorption of the zinc in synthetic water. Thus, the application of conventional jar test method used for removal of zinc from synthetic water. Thus, the results of this project which is 52.40% of percentage removal of zinc with optimum conditions; pH7, 30mg dosage, 12 minutes of contact time, and 190 rpm agitation speed approved that chitosan competent to be the alternative adsorbent.
Journal of Applied Polymer Science, 2008
A new organic coagulant, sago starch (SS)graft-polyacrylamide (PAm), was prepared by the cericion... more A new organic coagulant, sago starch (SS)graft-polyacrylamide (PAm), was prepared by the cericion-induced redox polymerization of acrylamide (Am) onto SS at room temperature. The effects of the variation of the concentration of Am and the initiator on the percentages of yield and total conversion were investigated. The chemical composition, viscosity, and side-chain-average molecular weight of the obtained graft copolymers were determined. The newly obtained coagulant was tested for the treatment of the turbidity of water. The SS-g-PAm coagulants were found to achieve water turbidity removal up to 96.6%. The results of this study suggest that SS-g-PAm copolymer is a potential coagulant for reducing turbidity during water treatment.
Journal of Applied Polymer Science, 2004
Journal of Applied Polymer Science, Aug 28, 2001
The graft copolymerization of methyl methacrylate (MMA) onto sago starch was carried out in aqueo... more The graft copolymerization of methyl methacrylate (MMA) onto sago starch was carried out in aqueous media by different initiators of ceric ammonium nitrate (CAN) and potassium persulfate (PPS) and under a nitrogen gas atmosphere. Using CAN as an initiator, the maximum percentage of grafting (%G) was ascertained to be 246% at the following optimum conditions: a 70°C reaction temperature, a 2‐h reaction period, 2.0 mmol of CAN, 0.4 mmol of nitric acid, and 141 mmol of MMA. The maximum %G achieved with PPS as the initiator was 90%. The optimum conditions were a 50°C reaction temperature, a 1.5‐h reaction period, 47 mmol of monomer, and 1.82 mmol of PPS. The grafting of MMA onto sago starch was confirmed by the IR spectra of pure sago starch, MMA, and MMA grafted sago starch. This material may have application as a biodegradable plastic. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 1375–1381, 2001
Polymers
The present study involves the synthesis of photocatalytic composite nanofibers (NFs) comprising ... more The present study involves the synthesis of photocatalytic composite nanofibers (NFs) comprising ilmenite nickel titanite-supported carbon nanofibers (NiTiO3/TiO2@CNFs) using an electrospinning process. The photocatalytic composite NFs obtained were utilized in hydrogen (H2) production from the photohydrolysis of ammonia borane (AB). The experimental findings show that the photocatalytic composite NFs with a loading of 25 mg had a good catalytic performance for H2 generation, producing the stoichiometric H2 in 11 min using 1 mmol AB under visible light at 25 °C and 1000 rpm. The increase in catalyst load to 50, 75, and 100 mg leads to a corresponding reduction in the reaction time to 7, 5, and 4 min. The findings from the kinetics investigations suggest that the rate of the photohydrolysis reaction is directly proportional to the amount of catalyst in the reaction system, adhering to a first-order reaction rate. Furthermore, it was observed that the reaction rate remains unaffected ...
Australian Journal of …, 2011
In this work, a statistical model which can be used to evaluate the removal of chromium from aque... more In this work, a statistical model which can be used to evaluate the removal of chromium from aqueous solution using chitosan as an adsorbent has been developed. The experiment was described by varying chitosan dosage (10-30 mg), pH (5-8), contact time (10-90 min) and ...
IIUM Engineering Journal
A new method was developed to determine toxic dyes content in textileand other products using Fou... more A new method was developed to determine toxic dyes content in textileand other products using Fourier Transform Infrared (FTIR) spectroscopy withAttenuated Total Reflectance (ATR) element and KBr transmission cell. Thewavelengths used were selected using pure dyes and dye mixtures. Transmittance valuesfrom the wavelengths regions 3500 – 2650 and 1675 – 1500 cm-1 and partial least square(PLS) regression method were used to derive FTIR spectroscopic calibration model fordyes containing –N=N– in their structure. The coefficient of determinations (R2) for themodels were computed by comparing the results obtained from FTIR spectroscopyagainst the actual values of the dyes concentrations. R2 were 0.9321 and 0.9819 for twosamples of toxic dyes respectively. The standard errors (SE) of calibrations were 1.84and 1.36 respectively. The calibration model was cross validated within the same set ofsamples and the standard deviation (SD) of the difference for repeatability and accuracyof the FTIR...
Environmental Nanotechnology, Monitoring & Management
Environmental Nanotechnology, Monitoring & Management
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Papers by Isam Y . Qudsieh