@article { author = {El-Alfy, Ekhlass and Hashim, M. and A. Younis, Ahmed and Hussen, Samaha and Salama, A.}, title = {Eco –friendly Flame Retardant Via Self Assembly Coating}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {479-489}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.768.1024}, abstract = {Limiting oxygen index (LOI) of the most of the textiles in use have lower than 21%, while cotton has 18.4%, which means that they can burn easily once the fire has started. Currently, there is some difficulty in making durable flame retardant (DFR) treatments for cotton fabric using an ordinary one step wet process, which is nontoxic to the humans and the environment. This research has also aimed to investigate the optimum treatment conditions that allow controlled deposition of zinc oxide onto carboxymethylated cotton fabric using sodium hypophosphite (SHP) /citric acid (CA). In this regards, the influence of the process parameters on the physicochemical and performance properties of treated cotton fabric will elucidate. The treated fabric was monitored for carboxylic content, LOI, char length, char residue, whiteness index, retained tensile strength and elongation at break. The formation of zinc oxide was verified using UV-Visible spectrum at wavelength of 325nm. Also, the zinc oxide in nano scale was monitored and observed in the range of 19-41nm by transition electron microscope (TEM). The treated cotton fabrics show LOI value and char length 25.3%, 3cm respectively, compared with 18.4 and 11cm for untreated fabric. The existence of zinc oxide particle interaction and other functional groups introduced into cotton fabrics were promoted by Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and X-ray diffraction (XRD).}, keywords = {Carboxymethylation,Cotton Fabrics,Functional finishing,flame retardant,LOI}, url = {https://ejchem.journals.ekb.eg/article_3266.html}, eprint = {https://ejchem.journals.ekb.eg/article_3266_b0119402e0d2890112adbe18190bb470.pdf} } @article { author = {Fouda, A. S. and Rashwan, S. M. and Mohammed, A. E. and Ibrahim, Aisha}, title = {Salicornia Begolovi as Eco-Friendly Corrosion Inhibitor for Aluminum in Hydrochloric Acid Solution}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {491-505}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.698.1018}, abstract = {THE INHIBITION effect of Salicornia Begolovi extract (SBE)as saving corrosion inhibitor foraluminum (Al) in1 M HCl solution was studied using weight loss (WL), electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM) and potentiodynamic polarization (PP) measurements.It was found that the Salicornia extract acts as a good inhibitor for aluminum corrosion in the acid solution. The inhibition efficiency (IE) increaseswithincreasing of both extract dose and temperature, indicating that this extract was adsorbed chemically on Al surface.PP studiesindicated that the extract acts as a mixed type inhibitor. EIS studies showed a reduction in the double layer capacitance and an increase in the charge transfer resistance. The adsorption of extract molecules was found to obey Temkinadsorption isotherm. The extract provides a good protection film to aluminumagainst corrosion in HClsolutions.Surface analysis was tested using scanning electron microscope (SEM). The results obtained from all investigated techniques are in good agreement.}, keywords = {Acid inhibition,Aluminum,SBE,WL,EIS,EFM,SEM}, url = {https://ejchem.journals.ekb.eg/article_1986.html}, eprint = {https://ejchem.journals.ekb.eg/article_1986_f217175bb5413ee9aa13ae79e0108a35.pdf} } @article { author = {Abd El-Ghaffar, Mahmoud and Akl, Magda and Kamel, Amira and Hashem, Mona}, title = {Amino Acid Combined Chitosan Nanoparticles for Controlled Release of Doxorubicin Hydrochloride}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {507-518}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.745.1021}, abstract = {Therapy with amino acids (TAAI) has large interest recently for tumor treatment. Complementing to our previous studies in biopolymers and amino acids for medical applications this study was addressed to design a unique therapeutic regime consisting of a cocktail from therapy with amino acids (TAAI) and polymer therapy for cancer disease. This regime is depending on synthesized Doxorubicin loaded chitosan - glutamic acid (Cs-Ga-DOX) nanoparticles via ionic gelation path- way. The encapsulation efficiency was 69%. The average size was 20-37 nm with spherical, homogenous structure, and positive zeta potential.FTIR of Cs-Ga confirmed the formation of amide linkage at 1644 cm-1. The in -vitro release of DOX was examined for both pH 5.5 and 7.4 to be biphasic with mutual burst release followed by sustained release for 168 h to reach 58% at pH 5.5 and 25% at pH 7.4.This result suggested that Cs–Ga nanoparticles presented a promising mixture of glutamic amino acid and chitosan as pH-responsive nano-carrier for anticancer drugs.}, keywords = {Therapy with amino acids (TAAI),Chitosan- glutamic nanoparticles,Smart drug delivery systems,Doxorubicin hydrochloride,In-vitro controlled release study}, url = {https://ejchem.journals.ekb.eg/article_3264.html}, eprint = {https://ejchem.journals.ekb.eg/article_3264_7540518d0138d4ba399d2643c5e2bb04.pdf} } @article { author = {Elmorsi, Randa and Hamed, Mohamed and Abou-El-Sherbini, Khaled}, title = {Physicochemical properties of Manzala Lake, Egypt}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {519-535}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.776.1025}, abstract = {Physicochemical parameters such as temperature, total dissolved solid (TDS), pH, salinity, dissolved oxygen (DO), biological oxygen demand (BOD), permanganate index (PI), chloride and nutrient salts were measured in water samples, collected from 12 sites of Manzala Lake during winter and summer, 2015. A lot of fluctuations were observed in these parameters affected by the poor connection of water body of the lake and the diversity of the incoming flows. The pH values of water were alkaline throughout the lake and closely correlated with widely varied salinity and DO values. BOD increases in the south eastern-located sites affected mostly by Bahr El Baqur drain effluents especially during winter during the scheduled water block. PI was highly influenced by the agricultural and domestic waste effluents. Nutrients salts ranged between 5.47-249, 2.61-15.1, 0.64-24.5, and 3.47-22.9 µmol L-1 for ammonia, nitrite, nitrate and phosphate, respectively. N/P ratios (2.28-12.8) in the present study indicated that nitrogen is the limiting factor for phytoplankton fluorination except for some sites in the south eastern region. The levels of total polycyclic aromatic hydrocarbons were found affected by the seawater inflows during winter. It can be concluded from obtained data that the south eastern region showed worst water quality parameters.}, keywords = {brackish water,Nutrients,Physicochemical parameters,total polyaromatic hydrocarbons}, url = {https://ejchem.journals.ekb.eg/article_3267.html}, eprint = {https://ejchem.journals.ekb.eg/article_3267_75bd8aeae08a1dc7553b34f3d97830b9.pdf} } @article { author = {Attia, Amina and Shouman, Mona and Elkhouly, Sahar}, title = {Insights onto the Adsorption of MFe2O4 Nanoparticles Loaded onto Activated Carbon}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {537-549}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.3268}, abstract = {In this work, magnetic nanoparticles of MFe2O4 (M: Fe, Mn, Cu and Co) were prepared on the surface of granular activated carbon throughout the impregnation process, employing HNO3 acid as the carbon modifying agent. These adsorbents were employed to assess the adsorption capability of p-chlorophenol from aqueous solution. The adsorbents were characterized by XRD, SEM, EDX and nitrogen adsorption isotherms. Additionally, the impact of various parameters such as pH, contact time was investigated. The results demonstrate that the current phase is mainly- Fe2O3 (maghemite), spinel manganese, copper and cobalt ferrite, respectively. The equilibrium details were best ascribed by the Langmuir model accompanied by high adsorption capacity of 110mg/g for - Fe2O3/ activated carbon. The kinetic experimental analysis of the adsorption model perfectly was correlated to the pseudo – second order kinetics. With the advantages inexpensive and fast processing, these adsorbents could attain promoting application in wastewater treating.}, keywords = {MFe2O4 nanoparticles,Granular activated carbon,p-chlorophenol,Adsorption}, url = {https://ejchem.journals.ekb.eg/article_3268.html}, eprint = {https://ejchem.journals.ekb.eg/article_3268_0bb7b5137af7a4c0b7c3be115122dc7f.pdf} } @article { author = {Hashem, Mohamed and Refaie, Rakia and Zaghloul, Saad and Ezzat, Ahmed and Ellaithy, Ahmed and A. Shaaban, Hamdy}, title = {Bioactive Jute Fabrics for Packaging and Storage of Grains and Legumes Applications}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {551-561}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.859.1038}, abstract = {Abstract Recently, anti-microbial finishing of cellulosic based material gain interest from both scientific and industrial point of view. Anti-microbial food packaging is a system that is able to kill or inhibit the growth of microorganisms contaminating with foods. Direct contact of antimicrobial food packaging fabrics with incubated foodstuff inhibit the growth of microorganism to large extend. This would increase the shelf life of foods and decrease the risk of food borne illness. In this work, jute fabrics were functionalized to provide permanent bioactivity for packaging and storage application especially for grains and legumes was develop and investigated. Swatches from the scoured jute fabrics were treated separately with chitosan (1 % aqueous solution) (substrate I), chitosan and neem extract (substrate II), triclosan (substrate III) and reactive cyclodextrin (R-CD) followed by neem extract (substrate IV). Treated and untreated fabrics were monitored for antibacterial and anti-anthropoids properties. Results obtained showed that, jute fabrics treated with chitosan and neem extract exhibit antibacterial activity towards both S. aureus and E. Coli compared with the untreated one. Moreover, untreated jute fabric did not shows any deterrent effect toward Callosobruchus maculates, whereas all treatments show a sharp decrement in average number of hatching eggs and average number of adults after 7 days of incubation but with different degree. Higher decrement in average number of hatching eggs and adults was observed when jute fabrics treated with a chitosan in the presence of neem (substrate II) and those fabrics treated with R-CD in the presence of neem (substrate IV) were used as packaging for cowpea. The deterrent effect reached to 100 % against Callosobruchus maculates.}, keywords = {Keywords: Antimicrobial,Cotton fabric,cellulose,Food Package,Functional finishing,Insect Repellent}, url = {https://ejchem.journals.ekb.eg/article_3269.html}, eprint = {https://ejchem.journals.ekb.eg/article_3269_30fb1595f9bf7faca8cd8f00efa4f735.pdf} } @article { author = {Ibrahim, Saher Fawzy and Essa, Dalia}, title = {Metrological Evaluation of Prepared Turbidity Working Standard Solutions to achieve Traceability for Textile Waste Water Effluents}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {563-575}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.938.1046}, abstract = {Working standard must be stable, thus the material should be tested for stability and homogeneity testing complying ISO standard methods with detailed description of how their features and characteristics facilitate all aspects of good laboratory practice (GLP). Stock solutions of (4000) NTU formazin turbidity suspensions were prepared, from this stock a series of diluted suspensions were prepared, and then verified by testing their pH, and spectrophotmatric absorbance values in accordance with published international models. Finally the statistical parameters and accompanied uncertainty for each certified value was calculated. The prepared stock working standard (4000 NTU) solutions were verified via applying the requirements of ISO/IEC 17034 for the homogeneity and stability testing. The results obtained verified the homogeneity and the stability of these working standards as a primary stock for about one year shelf time stability. These prepared stock solutions can be used as working standards for calibrations of turbidity meters that used for testing the turbidity of textile waste water effluents. The main goal of the study is the developing of these standards locally in Egypt. As an applied part the turbidity values of the scouring solutions from different textile fabrics -were measured, these fabrics were ; cotton, wool, silk, nylon and polyester, after calibration of the used turbiditmeter once by the purchased formazin standards and another time by the prepared working standards. Where comparable results were obtained which ensured the suitability of these prepared working standards.}, keywords = {Formazin Working Standard,CRM,Homogeneity,stability,Statistical parameters,Turbidity,Textile effluents,fabrics,Scouring}, url = {https://ejchem.journals.ekb.eg/article_3291.html}, eprint = {https://ejchem.journals.ekb.eg/article_3291_89c3d3c297990352d2feb57c14163714.pdf} } @article { author = {Aboelenin, Reham and Kheder, Sohair and Farag, Hala and El Nabarawy, Thoria}, title = {Removal of Cationic Neutral Red Dye from Aqueous Solutions Using Natural and Modified Rice Straw}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {577-589}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.1124.1055}, abstract = {Modified colloidal carbons were prepared by reacting colloidal carbon obtained from rice straw with thermal oxidation, nitric acid and urea treatment. The textural and chemistry characteristics of the surface of non-modified and modified carbons were obtained from nitrogen adsorption at -196oC, elemental analysis and fourier transform infrared (FTIR) techniques. The uptake of cationic neutral red (NR) dye from aqueous solutions by these carbons was determined by kinetic and equilibrium experiments. The surface area and the total pore volume decreased, whereas the pore radius increased after the treatment with nitric acid.The surface pH of un–modified carbon was basic while those of modified carbons were acidic. Urea treated carbons with the lowest acidic character and high nitrogen content presented the lowest NR dye uptake capacity. The maximum removal of NR dye was obtained at a pH of 4. The amount of adsorption by the investigated carbons was found to depend on the amount of surface acidity. The adsorption results were analyzed considering Langmuir, Freundlich and Dubinin-Radushkevich(D-R) models. The adsorption of NR dye onto the assessed adsorbents is of the physical sorption type following pseudo – first – order kinetic.Nitric acid modification brought about a significant rise in NR dye adsorption which was ascribed to the formation of oxygen containing acidic groups on the surface of adsorbent.The equilibrium adsorption data of NR dye were well fitted with Langmuir and D-R models.}, keywords = {Keywords: Rice straw,Colloidal carbon,Adsorption,Neutral red dye,Surface chemistry}, url = {https://ejchem.journals.ekb.eg/article_3543.html}, eprint = {https://ejchem.journals.ekb.eg/article_3543_4964e195970c48d99e690a0c16f03759.pdf} } @article { author = {Soliman, Hanaa and Shattory, Yousof}, title = {Separation of Palmitic Acid from over Used Oil for Production of Heterogeneous Organic Derivatives of Potential Biological Activities}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {591-600}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.889.1041}, abstract = {Palmitic acid was extracted from Over used oil according to the method described by Hanaa Soliman etal1. Where the over used cooking oil was filtered off, then it was hydrolyzed with distilled water in high pressure reactor at 250˚C and 2 MPa as described by Sonntag etal2 to produce glycerol and mixture of fatty acids. Fatty acids mixture was cooled at 7˚C in order to precipitate all saturated fatty acids, which were then filtered off, Palmitic acid was extracted from this mixture by means of supercritical CO2 extractor at pressure of 35.0 MPa and temperature of 328˚K according to Maheshwari etal3, followed by its methylation and confirmation by GC mass. Then it was used as precursor for production of a different heterocyclic compounds, which were then tested for their antimicrobial activities. Thus the long-chain methyl palmitate was interacted with hydrazine hydrate4 to produce the corresponding acid hydrazide (2), that was then treated with phenyl isothiocyanate, furnished the corresponding thiosemicarbazide 4. The later was reacted with ethyl chloro(arylhydrazono) acetate 5a-b in dimethylformamide, in the presence of triethylamine, afforded thiadiazole derivatives 7a-b . A solution of thiosemicarbazide 4 in ethanol was interacted with the α-haloketones 9 in the presence of triethylamine, produced the parallel thiadiazine 12. The structure elucidation of all synthesized compounds is based on the elemental analysis and spectral data (IR, 1H NMR, 13C NMR and MS).}, keywords = {Fatty acid hydrazides,pathological conditions,thiadiazoles,haloketones,thiosemicarbazide}, url = {https://ejchem.journals.ekb.eg/article_3540.html}, eprint = {https://ejchem.journals.ekb.eg/article_3540_619b20dfa0d55dc97cb06e87a7f00cab.pdf} } @article { author = {Ali, Shimaa and Galal, Ahmed and Atta, Nada and Shammakh*, Yassmin}, title = {Toxic Heavy Metal Ions Removal from Wastewater by Nano-Magnetite: Case Study Nile River Water}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {601-612}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.3583}, abstract = {Nano-magnetite wasused as an eco-friendlysorbent (without the usage of surfactants during the synthesis) for removing Pb(II), Cd(II) and Cr(III) from water and wastewater. A single 7 nm cubic phasefor magnetitewas ascertained by X-Rays diffraction (XRD) and high resolution transmission electron microscope (HRTEM).Field emission scanning electron microscopy (FESEM) image showed the agglomeration of magnetite particles upon adsorption. The Langmuir isotherm was used to estimate themaximum adsorption capacities of 576.4, 144.3 and 301.0 mg/g for Pb(II), Cd(II) and Cr(III), respectively.The adsorption mechanism followed a pseudo-second order kinetics.The studied competing cations and anionsshowed minor effects on the rate of adsorption.Magnetite with high adsorption ability adsorbed Pb(II), Cd(II) and Cr(III) from a ternary mixture aseffectively as from their individual solutions. The presented sorbent can be regenerated by 1% HNO3 with a recovery percent of 91.4 % and reused with an adsorption efficiency of 84.1 % compared to the freshly prepared magnetite. As an example of application, the nano-magnetite was used to decontaminate river water-samples from lead ions.  }, keywords = {Waterdecontamination,Nano-oxides,Riverwater,Adsorption isotherm,Sorbent regeneration}, url = {https://ejchem.journals.ekb.eg/article_3583.html}, eprint = {https://ejchem.journals.ekb.eg/article_3583_44474937e29e82955bf7ba8ea9138623.pdf} } @article { author = {Albalawi, Marzough}, title = {Evaluation of Antibacterial and Antifungal Effects of Novel Hydroxamic Acids Linked-natural Amino Acids}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {613-618}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.908.1042}, abstract = {A series of new derivatives containing hydroxamic acids linked-amino acids have been synthesized and fully characterized by spectroscopic techniques including; 1H, 13C, DEPT 135 and HRMS. These new compounds were tested for their antibacterial and antifungal activities.}, keywords = {amino acid,Hydroxamic acid,Sulfonamides,Antibacterial and Antifungal Activities}, url = {https://ejchem.journals.ekb.eg/article_3498.html}, eprint = {https://ejchem.journals.ekb.eg/article_3498_70ded145828b14e5b85bf7a97b289792.pdf} } @article { author = {Badawy, Abdelrahman and Rashad, Ahmed and Yehia, Naema}, title = {Physicochemical and Catalytic Conversion of Iso-propanol over NiO-doping/nanosized ZnO-Fe2O3 system}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {619-625}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.918.1044}, abstract = {Catalytic activities of solids on isopropanol conversion at 200-400 ◦C using flow method. Addition of NiO and increasing the heating temperature stimulated ZnFeO4 formation. Crystallite size of ZnFeO4 phase varied between 11.5 and 28.6 nm. The increasing of calcination temperatures and/or by increasing the amount of dopant of various solids led to decrease of their SBET. The decrease of SBET might be attributed due to the creation of anionic and cationic vacancies which might increase the sinterability. Isopropanol conversion of the investigated solids increased which might be attributed to the formation of cationic and anionic vacancies which accelerate reduction-oxidation cycles.}, keywords = {NiO-doping,Isopropanol conversion,Zinc ferrite,reduction-oxidation cycles}, url = {https://ejchem.journals.ekb.eg/article_3538.html}, eprint = {https://ejchem.journals.ekb.eg/article_3538_fc08579276b8fa251ef97029b8a81493.pdf} } @article { author = {Shaheen, Waleed and Selim, Mohamed}, title = {Characterization and Catalytic Properties of a Series of CuO-MoO3 Mixed Oxides}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {627-637}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.1062.1052}, abstract = {A series of single and mixed oxides of CuO-MoO3 system were prepared by thermal treatment of pure and mixed basic copper carbonate and ammonium molybdate tetrahydrate solids. The thermal behavior of the pure and binary salts has been studied using thermal analysis (TG-DTA) technique. The thermal products were characterized using the X-ray diffraction analysis. The results revealed that, pure solids decomposed to CuO, MoO3 and Cu2O phases at 250, 340 and 1000oC respectively. Solid-solid interaction takes place between single oxides forming different phases of copper molybdate depending on treatment temperature and mixture composition. The degree of crystallinity of the detected phases was affected by calcination temperature of solids and composition. The catalytic activity of single and binary oxides was tested in decomposition of hydrogen peroxide as a model reaction. The catalytic activity of mixed oxides was found to be higher than that of single oxides at different treatment temperature. The mechanism of decomposition reaction over the prepared oxides was discussed.}, keywords = {CuO-MoO3,Thermal analysis,X-ray,Catalytic activity,H2O2}, url = {https://ejchem.journals.ekb.eg/article_3541.html}, eprint = {https://ejchem.journals.ekb.eg/article_3541_5a7a57ea3c5b74dc40f965bfa30a1e4a.pdf} } @article { author = {Adel, abeer and El-shafie, Amira and Al-Shemy, mona and Ibrahim, Atef and Rabia, Abd El-Gawad}, title = {Influence of Cellulose Polymorphism on Tunable Mechanical and Barrier Properties of Chitosan/Oxidized Nanocellulose Bio-Composites}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {639-652}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.1194.1062}, abstract = {Food packaging based on biodegradable material attracts a lot of attention nowadays. Chitosan (CS) is an available biopolymer that has been extensively studied as a potential source for food packaging. However, its weak barrier for water vapor diffusion and mechanical properties need to be improved. Oxidized nanocellulose (ONC) has been prepared from date palm sheath fibers by the ''green'' ammonium persulfate (APS) hydrolysis. The particle size distribution confirmed the success of ONC extraction. The CS/bio-composites were loaded with 1, 3, 5, 7 and 10% ONC-I and II fractions. The FTIR spectroscopy analysis was carried out to investigate the types of interaction exerts between these bio-composite components. The water vapor permeability, water sorption isotherm and mechanical test of the neat CS film and CS/bio-composite films were studied. Cellulose polymorphism was found to be an important factor which could influence the bio-composite properties.}, keywords = {Bio-nanocomposite,Food Package,Polymorphism,Mechanical Properties,Water vapor permeability,Water sorption isotherm}, url = {https://ejchem.journals.ekb.eg/article_3539.html}, eprint = {https://ejchem.journals.ekb.eg/article_3539_3bb8580bffa8e4fbcd710ede388e7512.pdf} } @article { author = {Abou-Yousef, Hussein and Kamel, Samir and Gad, Naser}, title = {Utilization of Short-cut PET Fibers as Reinforcement Additive for Kraft Bagasse Paper Making}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {653-665}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.1115.1054}, abstract = {One of big challenges in Egyptian pulp and paper sector is the exploring of new prospective for development and improvement the properties of paper made from Kraft bagasse pulp. The study utilized polyethylene terephathalate (PET) as reinforcement to the pulp made from Kraft bagasse to improve the paper properties. Increasing of the computability between PET fibers and Kraft pulp could be achieved by different partial hydrolysis processes for PET with sodium hydroxide, sulphuric acid, or ethanol amine. Optimum pretreatment conditions for different types of partial hydrolysis were identified to be used in formation of blended paper sheets with Kraft bagasse pulp. The study has investigated the effect of kind of pretreatment and concentration of PET on the mechanical, moisture uptake, and thermal aging for blended paper sheets made from PET fibers and Kraft pulp. The blended paper sheets using alkali pretreated PET manifested superior mechanical, thermal, and moisture resistance properties in comparison with paper sheets manufactured from blending with acidic, or amine pretreated PET.}, keywords = {Polyethylene terephathalate,Kraft bagasse pulp,thermal aging,Moisture resistance,Mechanical Properties}, url = {https://ejchem.journals.ekb.eg/article_3542.html}, eprint = {https://ejchem.journals.ekb.eg/article_3542_eddfd7918fcb04383c4cb7b00d67a65e.pdf} } @article { author = {Habib, Mohammad}, title = {Non-Chemically Modified Prefix Substance as a fat liquor for Leather Manufacture from Recovered Neatsfoot Oil}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {667-674}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.1159.1058}, abstract = {The study is an attempt to provide an economic prefix substance for leather manufacture. An economic and straightforward method has been applied to recover neatsfoot oil from abundant low-cost byproduct (local massacres byproducts). Leather lubricant agent with extra lubricating power has been formulated from the recovered crude oil without chemical modification or further chemical treatment, using a commercial anionic surfactant. It was found that the highest emulsion stability of the formulated lubricants against pH variation and sundry factors involved in leather tanning has been verified at 30 – 40 % oil concentration with 2 – 4 % anionic surfactants as an emulsifier, at 500 rpm stirring speed. Different emulsion concentrations (2 -10 %) of the formulated lubricant has been tested as lubricant agent for wet blue leather. The emulsions concentration of 8% and 10% formulated lubricant were able to add the required quantity fatty matter to the lubricated leather fiber (9.12 % and 9.89 % respectively , based on the weight of lubricated leather ). These ratios are close to that was added by the commercial lubricant at the same concentration. The lubrication process enhances high-performance power and good lubricant effect. The highest values of tensile strength and elongation at break of lubricated leather have been reached at 10 % emulsion concentration, nearly similar to the effect developed by the commercial lubricant. The microscopic examination of the lubricated leather shows that the leather fiber is genuinely coated with a thin film of fat and the perspective of the lubricated leather surface was superior. In addition, the lubricated leather was ostensibly amended.}, keywords = {Fatliqiuoring,leather,Neatsfoot oil,recycling}, url = {https://ejchem.journals.ekb.eg/article_3687.html}, eprint = {https://ejchem.journals.ekb.eg/article_3687_6698ee5e7ed9da923e3a56570b351736.pdf} } @article { author = {}, title = {Synthesis, Characterization and Antimicrobial Evaluation of Newly Synthesized Compounds With Phthalimide Skeleton}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {675-688}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.4071}, abstract = {In an effort to develop new antimicrobial agents, a novel series of 2-{[4-(substituted phenyl)amino]methyl)-1H-isoindole-1,3(2H)-dione derivatives 2-17a,b was synthesized starting from 2-({[4-(bromoacetyl)phenyl]amino}methyl)-1H-isoindole-1,3 (2H)-dione 1 by introducing different hetero-cyclic moieties, such as thiazole, thiazolidinone, azetidinone, furan and pyrazole. The structures of all the synthesized compounds have been elucidated by means of IR, 1H NMR, mass spectroscopic data and elemental analysis. Most of the synthesized compounds were screened for their antimicrobial activity by means of agar well diffusion assay while the minimal inhibitory concentrations of the active compounds were then assessed utilizing broth dilution method. Derivative 2-[(4-{[(1,3-Dioxo-1,3-dihydro-2H-isoindol-2-yl)methyl] amino} phenyl)-2-oxoethyl]propane dinitrile 15 was the most potent compound.}, keywords = {Phthalimide,Heterocyclic derivatives,thiazole,antibacterial agents,antifungal agents}, url = {https://ejchem.journals.ekb.eg/article_4071.html}, eprint = {https://ejchem.journals.ekb.eg/article_4071_9b40c6f9f50580b48ad74e4849cee0b7.pdf} } @article { author = {}, title = {Hydrotreating Activity of Co-Mo/Al2O3 Promoted with Boron and Phosphorous}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {689-696}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.4150}, abstract = {Co-Mo/Al2O3 commercial catalytic used wetness impregnation method to prepare Co-Mo B/Al2O3 and Co-Mo P/Al2O3. We study the characterization of this catalyst which contains 12.0 wt. % Mo and 4.0 wt. % Co in γ-Al2O3 and gave the higher surface area of 192 m2/g. The effects of boron and phosphores addition on the HDS and HDA of heavy gas oil over CoMo/g-Al2O3 catalysts have been studied. The addition of boron slightly improves the acidity of the acid sites, Thus, the catalytic hydroprocessing activities of heavy gas oil over the CoMo/g-Al2O3 catalysts may be related to the acidity and metal dispersion of the catalysts. Furthermore, the addition of phosphorus improves the dispersion of Co and Mo species, which also enhance thecatalytic performance. Also, the addition of phosphorus caused the formation of acid centers.}, keywords = {}, url = {https://ejchem.journals.ekb.eg/article_4150.html}, eprint = {https://ejchem.journals.ekb.eg/article_4150_79426e58467473db788e8dc3de259946.pdf} } @article { author = {}, title = {Synthesis, Characterization and Performance Evaluation of Lithium Manganese Oxide for Lithium Adsorption}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {697-710}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.4170}, abstract = {The recovery of lithium from seawater via adsorption is a promising separation technique that could be incorporated within integrated salt recovery schemes. In this work, spinel-type manganese oxide adsorbents were prepared and utilized for selective lithium adsorption from synthetic solutions. The semi-dry solid-state method was adopted to prepare spinel-type ion sieves using different manganese and lithium sources; manganese carbonate, manganese oxide, lithium carbonate and lithium hydroxide. Synthesis was conducted at different Li/Mn starting molar ratios, firing temperatures and firing durations. The prepared spinels were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Moreover, average particle size and zeta potential were measured for selected spinel adsorbents. In addition, their sorption capacities and lithium removal efficiencies from synthetic solutions were evaluated. Lithium uptake results suggested that the spinels (H1.1Li0.08Mn1.73O4.05) prepared from manganese carbonate and lithium hydroxide at Li/Mn ratio of 0.75 exhibited at pH 12 the highest lithium sorption capacity among other prepared spinels. The equilibrium of lithium sorption onto this adsorbent was best described by Langmuir isotherm model and the maximum equilibrium sorption capacity was found to be 50 mg/g. This capacity was obtained using 0.25 g/L of the adsorbent at pH 12 and its value is higher than previously reported values. Thus, the prepared spinel shows promising features that favor its utilization for lithium removal from wastewater and concentrated brines.}, keywords = {A. synthesis,D. manganese oxide spinels,E. lithium selective adsorbents,E. equilibrium adsorption}, url = {https://ejchem.journals.ekb.eg/article_4170.html}, eprint = {https://ejchem.journals.ekb.eg/article_4170_6933992edf65dcdc3a7a6b76198fffc5.pdf} } @article { author = {}, title = {Synthesis of Polynuclear Heterocyclic Compounds Derived from 1-Biphenyl-4-yl-4-(1-methyl-1H-benzimidazol-2-yl)- but-2-en-1-one with expected Biological Activity}, journal = {Egyptian Journal of Chemistry}, volume = {60}, number = {4}, pages = {711-722}, year = {2017}, publisher = {National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT}, issn = {0449-2285}, eissn = {2357-0245}, doi = {10.21608/ejchem.2017.4171}, abstract = {N ucleophilic addition of barbituric acid, thioglycolic acid with malononitrile and 3-Amino-5-pyrazolinone with 1-Biphenyl-4-yl-4-(1-methyl-1H-benzimidazol-2-yl)- but-2-en-1-one (1) gives pyrimidine, Thiazol and pyrazolinone derivatives (2-4) , repectively.Compound (4) which reacted with Arylidene malononitrile in ethanol to gives pyrano derivatives (5). Cyclocondensation of chalcone (1) with thiourea under reflux in ethanolic NaOH lead to thiazine derivative (6) and by treatment of (6) with bromine – acetic acid mixture afforded compound (7) similarly, cyclization of chalcone (1) with orthophenylinediamine in Dimethylformamide (DMF) gives diazepine derivatives (8).Also, chalcone (1) reacted with 3-Amino-5-pyrazolinone in ethanol to give pyrazolinone derivative (9). (Scheme 1).The condensation of compound (1) with 2- cyanoacetohydrazide through the acid-catalyzed reaction to form the Schiff base (10) by heating in 96% acetic acid give the diazetidine derivative (11) which upon reaction with phosphorous oxychloride gave the chlorodiazetidine derivative (12), the latter compound reacted with 2ry amines and yielded the substitueted amino diazetidine derivatives (13 a-c).On the other hand, the Schiff bases (14) produced from condensed compound (1) with 2-Amino-2-(hydroxy methyl) propane-1,3-diol in ethyl alcohol which reacted with phosphorous oxychloride give the propanol derivatives (15).Finally, the cyclization reaction of compound (1) with 2-aminophenol and 2-aminothiophenol in dry benzene formed compounds (16, 17) , repectively.(Scheme 2).}, keywords = {}, url = {https://ejchem.journals.ekb.eg/article_4171.html}, eprint = {https://ejchem.journals.ekb.eg/article_4171_fef8aae062705003e9edbca7d7a7dbda.pdf} }