Heterocyclization of Isoniazid: Synthesis and Antimicrobial Activity of Some New Pyrimidine, 1, 3-Thiazole, 1, 2, 4-Thiadiazole, and 1, 2, 4-Triazole Derivatives Derived from Isoniazid
Mona E.
Farhan
Department of Chemistry, Faculty of Science, Zagazig University, Egypt.
author
Mohammed G.
Assy
Department of Chemistry, Faculty of Science, Zagazig University, Egypt.
author
text
article
2019
eng
The reaction of isonicotinic hydrazide (1) (isoniazid) with cinnamoyl isothiocyanate (2) afforded cinnamoyl thiosemicarbazide derivative 3. Treatment of 3 with lead acetate in acetic acid, sodium ethoxide, sulphuric acid, chloroacetylchloride and sodium hypochlorite and sodium hydroxide gave the corresponding dihydropyrimidine 4, triazolethiazine 5, 1,3,4-thiadiazole 6, 1,3-thiazole 7 and 1,2,4-thiadiazole 8, respectively. The reactivity of isoniazid 1 towards ammonium thiocyanate, cyclohexanone and acetophenone to give 1,2,4-triazole thione 10, hydrazones 9 and 12 was studied. Treatment of hydrazones 9 and 12 with carbon disulfide and aryl isothiocyanates gave 1,3,4-thiadiazolidine 11 and 1,2,4-triazole thione derivatives 13a, b. The antimicrobial activity of these new compounds has been evaluated against 6 microbial strains. Some of the newly synthesized compounds showed a moderate activity.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
171
180
https://ejchem.journals.ekb.eg/article_13451_ba8ef050cce3871607ef27145cbed172.pdf
dx.doi.org/10.21608/ejchem.2018.4427.1393
Evaluation of Antioxidant Efficiency of Croton tiglium L. Seeds Extracts after Incorporating Silver Nanoparticles
Wael
Mahmoud Aboulthana
Biochemistry Department, Genetic Engineering and Biotechnology Division, National Research Centre, Dokki, Giza, Egypt (Affiliation ID: 60014618).
author
Ahmed
Youssef
Packaging Materials Department, National Research Center, Dokki, Giza, Egypt (Affiliation ID: 60014618).
author
Amal
M. El-Feky
Pharmacognosy Department, Pharmaceutical and Drug Industries Research Division, National Research Centre, Dokki, Giza, Egypt (Affiliation ID: 60014618).
author
Noha
El-Sayed Ibrahim
Microbial Biotechnology Department, Genetic Engineering and Biotechnology Division, National Research Centre, Dokki, Giza, Egypt (Affiliation ID: 60014618).
author
Mohamed
M. Seif
Toxicology and Food contaminants, Food Industry and Nutrition Division, National Research Center, Dokki, Giza, Egypt (Affiliation ID: 60014618).
author
Amgad
Kamal Hassan
Biochemistry Department, Genetic Engineering and Biotechnology Division, National Research Centre, Dokki, Giza, Egypt (Affiliation ID: 60014618).
author
text
article
2019
eng
This study aimed to enhance efficiency of the different Croton tiglium (C. tiglium) seeds extracts by incorporation of silver nanoparticles (Ag-NPs) through raised up cytotoxicity against growth of human colon cancer cells. C. tiglium seeds contain various phytoconstituents e.g., carbohydrates (glycosides), flavonoids, sterols (triterpenes), alkaloids and proteins. The protein was hydrolyzed in the dried aqueous seeds extract into free amino acids, the essential amino acids (20.71%) & nonessential amino acids (79.29%). Furthermore, the mucilage in the dried aqueous seeds extract and the total identified sugars represent ~81.21 % of the total mucilage hydrolyzate. The lipoidal contents in the saponifiable matter of the petroleum ether extract, the total saturated fatty acids (13.68%), total monoenoic fatty acids (34.49%), total dienoic fatty acids (45.76%) and total identified fatty acids (93.93%). The unsaponifiable matter was represented by saturated hydrocarbons (40.73%), unsaturated hydrocarbons (18.93%), fatty alcohols (10.08%), sterols (10.61%) and total identified compounds (80.35%). In addition, there were four compounds (β sitosterol, α-amyrin, Oleanolic acid and 3-O-β-D-glucopyranosyl-β-sitosterol (daucosterol)) isolated from the petroleum ether extract. Additionally, incorporation of Ag-NPs into the extract caused no toxicity on the experimental animals when administrated orally. It was found that the median lethal dose (LD50) of the ethanolic, petroleum ether and aqueous seeds extract-Ag nanocomposites was about 7.95, 5.2 and 65 ml/Kg, respectively.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
181
200
https://ejchem.journals.ekb.eg/article_15762_5720c3e7be2e1d12b428f55ec06cdf4c.pdf
dx.doi.org/10.21608/ejchem.2018.4960.1442
The Impact of Cationic Surfactants on The Electrodeposition of Nickel/Graphene Nano-Sheet Composite Coatings on Brass
M.A.
Ameer
Chemistry Department, Faculty of Science, Cairo University, Giza -12613, Egypt.
author
Z.
Abdel Hamid
Corrosion Control and Surface Protection Department, CMRDI, Helwan, Cairo, Egypt.
author
M.
Shehata
Chemistry Department, Faculty of Science, Cairo University, Giza -12613, Egypt.
author
B.M.
Hassan
Chemistry Department, Faculty of Science, Cairo University, Giza -12613, Egypt.
author
A.M.
Fekry
Chemistry Department, Faculty of Science, Cairo University, Giza -12613, Egypt.
author
text
article
2019
eng
Graphene nano-sheets (GNS) and cationic surfactants (S1&S2) are utilized for nickel composite coatings electrodeposition. They have a significant role in increasing the corrosion resistance of these coatings. A use of Nickel watt’s bath with the addition of GNS as reinforcement material and different surfactants for nano-composite coatings deposition (Ni-GNS) are considered and the outcomes have been examined and discovered. Electrochemical techniques are utilized for examining the corrosion resistance for samples of nano-composite coatings in 0.6 M NaCl. The results suggest that the content of incorporated GNS increases with increasing the extent of GNS in plating bath. All of the Ni-GNS nano-composite layers in presence of surfactant have better corrosion resistance than the nickel coating. The best corrosion resistance value of about 64 kΩ cm2 and relatively highest hardness value of 509 Hv for the composite coating electrode of Ni-GNS/with S1 are in compare with the rest of nano-composite coating electrodes or pure Ni coatings.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
201
214
https://ejchem.journals.ekb.eg/article_13452_8a01a17dbe21e62dd36d85cf3eba6dc1.pdf
dx.doi.org/10.21608/ejchem.2018.4598.1404
Optimization Studies and Chemical Investigations of Aspergillus terreus-18 Showing Antioxidant Activity
Alaa
Saleh
Chemistry of Natural and Microbial Products Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
author
Heba
Elrefaie
Chemistry of Natural and Microbial Products Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt.
author
Abdelgawad
Hashem
Microbiology and Immunology Department, British University in Egypt (BUE)
author
Hassaan
EL-Menoufy
Chemistry of Natural and Microbial Products Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
author
Nahla
Mansour
Chemistry of Natural and Microbial Products Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt
author
Ahmed
El-Beih
Chemistry of Natural and Microbial Products Department, National Research Centre, 33 El-Bohouth St., Dokki, Giza 12622, Egypt,
author
text
article
2019
eng
Aspergillus terreus-18 ethyl acetate extract was chemically analyzed using High performance liquid chromatography (HPLC). This led to the isolation of the butenolide butyrolactone I (BL-1) which was identified using nuclear magnetic resonance (NMR) and mass spectra. As a major compound, BL-1 was tested for its antioxidant activity through its ability to scavenge the stable free radical 2,2-diphenyl-1-picrylhydrazyl (DPPH). It showed high scavenging activity with IC50 2.4 (µg/ml). A. terreus-18 local isolate was chosen among 18 other isolates screened for their DPPH scavenging activity. A.terreus-18 showed highest scavenging activity (% inhibition), 80.4± 1.35. The fungal isolate was then grown on different media under either shaked or static conditions. Aspergillus terreus-18 extract obtained from growth on malt peptone broth under static conditions showed highest scavenging activity, 85 %. Optimization of different physicochemical parameters to enhance bioactivity and increase the total phenolic content (TPC) of the promising isolate was done through response surface methodology (RSM). Statistical approaches led to 1.17 fold increase of DPPH scavenging activity, 99.5% inhibition. This was obtained upon using (g/L) malt extract, 25; peptone, 6 as fermentation media with initial pH, 7 and volume 50% media /flask (50% aeration) and using inoculum size 15% v/v of 60 h aged culture incubated statically for 18 days at temperature 27±2 °C. Extracellular TPC and antioxidant activity positively correlated where TPC increased from 122.475 to 290.51 mg gallic acid/g of tested extract.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
215
230
https://ejchem.journals.ekb.eg/article_15128_7d5705ea950fa2e8dbe824dc545a0851.pdf
dx.doi.org/10.21608/ejchem.2018.4921.1438
Development and Optimization of A Non-traditional Extraction Process of Yellow Colorant from Safflower Petals as A Natural Colorant
Nagla
Elshemy
Dyeing, printing and auxiliaries department, Textile division, National research centre, Doki, Cairo, Egypt
author
Martina
Megaly
Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
author
K.
Haggag
Dyeing, printing, and auxiliaries department, textile research Division National Research Centre, cairo,
Egypt.
author
Ahmed
Hashem
Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
author
text
article
2019
eng
Yellow colorant was extracted from safflower petals through grinding, sifting, washing, filtering and drying. The Safflower petals were submitted to innovative extraction using microwave irradiation and under a variety of conditions. Variables studies including safflower concentration, duration of extraction, extracted dye bath pH and temperature to optimize the extraction condition. The effects of dye concentration, dye path pH, colorant temperature, colorant time and liquor ratio, were studied in terms of dye uptake and shade. Conditional changes in the innovatively extracted colorant and dyeing process vis-à-vis those of non-traditional extraction and dyeing were presented. The obtained results showed that the innovative extraction as well as dyeing process using the microwave irradiation consumes less time and energy when compared with the non-traditional technique. The results indicate further that current extraction colorant using the microwave or non-traditional heating brings into focus yellow colorant, which induces excellent overall color fastness when applied as a colorant in the dyeing of different fabrics. The analysis of absorption mechanism suggested that the hydrogen bonding and electrostatic interactions operating between Safflower yellow colorant and different fabrics lead to Freundlich absorption, though other interactions such as hydrophobic interaction and van der Waals forces contribute to Nernst partition adsorption. Freundlich absorption had a greater contribution to total adsorption of yellow colorant on wool fabric, whereas partition adsorption imparted greater influence to colorant adsorption on silk and wool/polyester blend fabric. The pseudo-second-order model describes appropriately the dyeing process of wool, silk and wool/polyester blend fabric based on safflower yellow colorant materials. The thermodynamic parameters of dye absorption showed a significant difference. The absorption affinity (−Δμ°) of extracted safflower yellow dye on wool, silk as well as wool/polyester blend fabric indicated that the absorption is a spontaneous and exothermic process. So, safflower yellow colorant could be a good candidate as a natural green dye.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
231
245
https://ejchem.journals.ekb.eg/article_14044_63d67003518e7d83852060dd59315c5a.pdf
dx.doi.org/10.21608/ejchem.2018.5119.1453
Nalbuphine HCl Assessment by the Quenching of the Emission of Tb -4’Carboxybenzo-18crown-6-Ether Optical Sensor
Lobna
Abd allah
Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, 11566, Cairo, Egypt.
author
Mohamed
Attia
Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, 11566, Cairo, Egypt.
author
Mohammed Sabry
Abdel-Mottaleb
Chemistry Department, Faculty of Science, Ain Shams University, Abbassia, 11566, Cairo, Egypt.
author
text
article
2019
eng
The efficiency of excited-state interaction between Tb3+and the 4'carboxybenzo-18crown-6-ether (CCE) has been studied in different solvents and pH. The high luminescence intensity of Tb-complex in DMF at 545 nm was obtained. The photo physical properties of the green emissive Tb3+complex have been elucidated. The Tb- CCE was used as photo probe for the assessment of Nalbuphin HCl in the pharmaceutical amp and serum samples at pH 6.5 and λex = 285 nm with a linear range 5x10-8 to 1.2x10-6 mol L−1 of Nalbuphin HCl, correlation coefficient of 0.993 and detection limit of 9.4 x10-9 mol L−1.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
247
255
https://ejchem.journals.ekb.eg/article_13453_c5ca58fa51a5311432c29faf93319b7c.pdf
dx.doi.org/10.21608/ejchem.2018.4624.1407
Cooling System Pipeline Corrosion Behavior After Reusing of Reverse Osmosis Reject Plant Water as Feed Water Source and Using a New Isatine Derivatives as Corrosion Inhibitors
Abdallah
Negm
Cairo Electricity Production Company
author
Abd elaziz
Fouda
Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
author
Rabab
Shalof
Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt
author
Saad
Mohamed
Chemistry Department,Faculty of Science, Ain-Shams University, Cairo, Egypt
author
Teriza
Youssif
Chemistry Department, Faculty of Science, Ain-Shams University, Cairo, Egypt
author
text
article
2019
eng
Iron corrosion and wastewater recovery are the most complicated and costly problems facing water utilities. A large number of parameters affect pipe corrosion, including water quality and composition. This work simulated reuse the reject water get out from reverse osmosis desalination plant as feed to cooling system. Evaluation of corrosion rate of pipeline that have been used in cooling system using this water after dosage of new corrosion inhibitors are studied by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods. The effect of temperature on the corrosion rate was investigated by the weight loss method and some thermodynamic parameters for corrosion. The results show that the inhibition efficiency increased with increase in inhibitor concentration and the results obtained from the techniques are in good agreement. The Langelier Saturation Index of the concentrate was reduced from 1.27 (High scale forming) to - 2.27 (No scale forming), thus treated water has properties of low fouling potential that facilitate its recycling and reuse in cooling system.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
257
280
https://ejchem.journals.ekb.eg/article_14045_6be3453c967d7615f5401a679bcac734.pdf
dx.doi.org/10.21608/ejchem.2018.4859.1432
Chemical Effect of Chlorination Process on Antibiotic Resistant Bacteria
Salwa
Samir
Water Pollution Research Department, National Research Center, Dokki, Giza, Egypt
author
Samar
Mohamed
Microbiology Department, Faculty of science, Ain Shams University, Cairo, Egypt
author
Ahmed
Shaban
Water Pollution Control Department, National Research Center, Dokki, Giza, Egypt
author
Yousseria
Shetaia
Microbiology, Ain Shams University
author
Mohammed
Kamel
Water Pollution Department,National Research Center, Dokki,Giza, Egypt
author
Gamila
El-taweel
Water Pollution Research Department, National Research Center, Dokki, Giza, Egypt
author
text
article
2019
eng
Abstract Current study was conducted to evaluate the effectiveness of chlorine as a simple and cheap application to inactivate antibiotic resistant bacteria. To achieve this aim, different doses of chlorine (1.0, 1.5, 2.0, 2.5 and 3 mg/l) were introduced to antibiotic resistant and sensitive isolates of Salmonella Typhimurium as an example of Gram negative bacteria for 20 min. contact time. The same chlorine doses were introduced to both antibiotic resistant and sensitive isolates of Staphylococcus aureus as an example of Gram positive bacteria for the same contact time. The antibiotic resistant isolates were obtained from antibiotic resistance genetic transformation experiment, which prove that antibiotic resistance in the aquatic environments was occurred by horizontal gene transfer (mainly genetic transformation). The obtained results showed that, antibiotic resistant and sensitive bacteria have the same chlorine susceptibility in either Gram negative and positive pathogenic bacteria. Whereas, the chlorine susceptibility in antibiotic sensitive and resistant isolates of Salmonella Typhimurium (Gram negative bacteria) was relatively higher than chlorine susceptibility in antibiotic sensitive and resistant isolates Staphylococcus aureus (Gram positive bacteria). Where, 3gm/l chlorine dose was able to make complete reduction of each of resistant and sensitive Salmonella Typhimurium at 20 min. contact time. Whereas, at the same chlorine dose (3mg/l) and contact time (20min.), Staphylococcus aureus still culturable (7.0x10 and 9.0x10 CFU/ml) for sensitive and resistant isolates, respectively. And statistical analysis found that there was inverse proportion between chlorine dose and the bacterial counts in both pathogenic bacterial isolates (antibiotic sensitive and resistant).
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
281
290
https://ejchem.journals.ekb.eg/article_14285_348fafe71d8d637fdbbf3607890cef2f.pdf
dx.doi.org/10.21608/ejchem.2018.4959.1441
Synthesis, Characterization, DFT of Novel, Symmetrical, N/O-donor Tetradentate Schiff’s base, Its Co(II), Ni(II), Cu(II), Zn(II) Complexes and Their in-vitro Human Pathogenic Antibacterial Activity
Satish
Chand
Department of Chemistry, Hans Raj College (University of Delhi), Delhi-110007, India
author
Monika
Tyagi
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, Delhi-110002, India
author
Prateek
Tyagi
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, Delhi-110002
author
Sulekh
Chandra
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, New Delhi-110002, India
author
Deepansh
Sharma
Amity Institute of Microbial Technology, Amity University, Rajasthan-303002, India
author
text
article
2019
eng
A novel tetradentate Schiff’s base ligand Bis(furfural)-1,8-naphthalenediimine (L) was synthesized and characterized by physical, analytical and spectral data. Complexes of Co(II), Ni(II), Cu(II) and Zn(II) of general composition MLX2 [L = C20H14N2O2 and X = Cl– , NO3– and OAc–] have been synthesized in 1:1 molar ratio of metal to ligand. The elemental analysis, molar conductance measurements, magnetic susceptibility measurements, Mass, IR, UV-Visible, NMR and EPR spectral studies of the compounds led to the conclusion that the ligand acts in a tetradentate manner in Co(II), Ni(II) and Cu(II) complexes, while in bidentate fashion in Zn(II) complex. Octahedral geometry was assigned to Co(II) and Ni(II) complexes, Tetragonal geometry for Cu(II) complexes and tetrahedral geometry for Zn(II) complexes of the Schiff’s base ligand. The thermal studies suggested that the complexes are more stable as compared to ligand and absence of coordinated water molecules in metal complexes. The geometries of Schiff’s base and metal complexes were optimized with respect to the energy taking the 6-31+g(d,p) basis set in Gaussian 09W programme in gaseous phase. The antibacterial studies of the compounds were examined against the human pathogenic, Gram negative bacteria i.e. Escherichia coli, Yersinia enterocolitica, Klebsiella pneumoniae, and Salmonella typhi and Gram positive bacteria i.e. Listeria monocytogenes and Enterococcus faecalis.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
291
310
https://ejchem.journals.ekb.eg/article_14293_64b7292ce5a17ce24dd52bdf7bdf3da2.pdf
dx.doi.org/10.21608/ejchem.2018.3991.1395
Optical characterization of Poly [2-methoxy-5-(2-ethylhexyloxy-p-phenylene vinylene] (MEH-PPV):C60, MEH-PPV:C60:TiO2 and MEHPPV:C60:ZnO Thin Films
Fawzy A.
Mahmoud
Physics, Solid Physics Department, National Research Centre (NRC), Cairo, Egypt.
author
Islam
Elazab
Chemistry Department, Faculty of Science, Helwan University Cairo, Egypt.
author
Ossama M.
Abo-Elenien
Petroleum Applications Department, Egyptian Petroleum Research Institute (EPRI)Cairo, Egypt.
author
Ahmed
Abdel Fatah
Chemistry Department, Faculty of Science, Helwan University Cairo, Egypt.
author
Adel A. M.
Ahmed
Chemistry Department, Faculty of Science, Helwan University Cairo, Egypt.
author
text
article
2019
eng
In this work, ZnO and TiO2 nanoparticles were prepared separately by sol gel method. Structural, morphological and optical properties of both of them are studied. A hexagonal crystal structure of ZnO was formed, while different weight ratio of Anatase (85%) and rutile (15%) phases of TiO2 nanoparticles were formed as confirmed by the X-ray diffraction (XRD). In addition, The XRD and Raman spectroscopy showed that our materials are polycrystalline. The particles sizes were calculated by sheerer formula are found to be closed to that got from scanning electron microscope (SEM) and transmission electron microscope (TEM). The band gaps for both materials were calculated from Kubelka-Munk function using their measured diffuse reflection. The band gap for ZnO and TiO2 nanoparticles found to be 3.4 eV and 3.2 eV respectively. Poly [2-methoxy-5-(2-ethylhexyloxy-p-phenylene-vinylene] which named MEH-PPV with C60 were dissolved and spin coated on glass substrates to get thin film. Structural, morphological and optical properties of this thin film were studied. Also, the effects of adding any of our metal oxides nanoparticles (ZnO or TiO2) on the physical properties of MEH-PPV:C60 are studied. All results are correlated to check the applicability of using these layers as an absorber layer for solar energy applications.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
311
323
https://ejchem.journals.ekb.eg/article_14623_6dd0d651023c524c7ad61221b4efdd12.pdf
dx.doi.org/10.21608/ejchem.2018.4816.1426
Novel Synthesis of Unsaturated Pigment Anthracene Triazole Acrylate via Click Chemistry to Prepare Colored Binder for Textile Printing
Karimah
Haggag
Textile Division, Dyeing printing and auxiliaries department, National research centre, Cairo, Egypt
author
Nagla
Elshemy
Dyeing, printing and auxiliaries department, Textile division, National research centre, Doki, Cairo, Egypt
author
Ahmed
Hashem
Chemistry Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
author
Zain
Mohamed
Textile Research Division, National Research Centre, Cairo, Egypt.
author
Fayza
kantouch
TextileDivision, Dyeing, printing and auxiliaries department, National Research center, Dokii, Cairo, Egypt
author
text
article
2019
eng
This work represents the synthesis and preparation of new unsaturated pigment, 2-anthracene triazole acrylate, via click reaction. The prepared pigment was used as a colored binder for textile printing with different fabrics types. Optimum of the prepared pigment content in the printing paste and its effect on the fastnesses properties of the prints were evaluated. This pigment contains unsaturated groups that could be co-polymerized with monomers to produce colored binders. The Measurements and Characterization of the prepared pigment (2-anthracene triazole acrylate) as particle size, particle size distribution, Glass transition temperature ( ), Stiffness properties as well as its rheological properties to evaluated if this prepared pigment can be used as a colored binder in textile printing of different fabrics. The prepared pigment (2-anthracene triazole acrylate) was considered as a monomer and copolymerized with acrylic acid and butyl acrylate and characterized. From the obtained data it can be concluded that this pigments would be a part from binder chains which enhances rubbing and fastness properties of the prints fabrics.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
325
332
https://ejchem.journals.ekb.eg/article_15124_d7b3311201d1a99a5fac2453def58940.pdf
dx.doi.org/10.21608/ejchem.2018.4057.1356
Processing of Polyurethane Nanocomposite Reinforced with nanosized Zinc Oxide: Effect on Mechanical and Acoustic Properties
Soma
El Mogy
Polymer Metrology and Technology Department, National Institute of Standards (NIS), Egypt.
author
Rabab S.
Youssef
Acoustic Department, National Institute of Standards (NIS), Egypt.
author
Anhar A.
Abd El Megeed
Polymer Metrology and Technology Department, National Institute of Standards (NIS), Egypt.
author
text
article
2019
eng
Nanostructured materials are an important subject in different applications. Zinc oxide (ZnO) nanoparticles have much attention because of their unique properties. The objective of this work is to synthesis zinc oxide nanoparticles by simplest chemical method (direct aqueous precipitation). Also, the effect of zinc oxide addition to polyurethane foam (PUF) on the mechanical and sound properties has been evaluated. Different concentrations of ZnO (0.25, 0.5, 1, 2 and 3 wt.%) were used. ZnO nanoparticles were characterized by some techniques such as X-Ray diffraction, Energy dispersive X-ray spectrometry and Transmission electron microscopy analysis. Scanning electron microscope was used to describe the dispersion state of the nanoparticles in the polyurethane foam. Density of PUF increased while the particle size decreased. Finally, it was confirmed that the mechanical and acoustic properties of polyurethane nanocomposites were improved and depend on the amount of nanozinc oxide.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
333
341
https://ejchem.journals.ekb.eg/article_15125_1423afae083fc0b4e98b9ec995907a88.pdf
dx.doi.org/10.21608/ejchem.2018.4655.1410
Variation of Chemical and Morphological Properties of Different Parts of Prunus Amygdalus L. and Their Effects on Pulping
Ibtissem
Moussa
1Research Unity of Applied Chemistry & Environment UR13 ES 63, University of Monastir, 5000 Monastir, Tunisia
author
Ramzi
Khiari
University of INP Grenoble (France) and ENIM Monastir
(Tunisia)
author
Ali
Moussa
National Engineering School of Monastir, 5019 Monastir, Tunisia.
author
Ragab
Abouzeid
Cellulose and paper department, National Research Centre
author
Mohamed
Mhenni
- University of Monastir, Faculty of Sciences, UR13 ES 63 - Research Unity of Applied Chemistry & Environment, 5000 Monastir, Tunisia.
author
Fouad
Malek
Department of Chemistry, University of Mohammed I, Oujda, Morocco.
author
text
article
2019
eng
Chemical and morphological of Prunus amygdalus L. characterization (shells and stems) were studied in order to assess their potentiality for chemical pulp. In this work, a simple, rapid and sensitive analytical method for the determination of monosaccharide composition in almond shells and stems polysaccharide was developed and validated. The soda-anthraquinone process was also applied in order to evaluate pulp properties. The effects of delignification and bleaching process were statistically investigated by employing response surface methodology. The isolated fibers were investigated and characterized using several techniques such as gel permeation chromatography, X-ray diffraction, morfi analyzer and scanning electron microscope. The obtained results can be considered as a potential source of cellulose for the production of cellulose derivatives, cellulose pulp for papermaking applications and natural fibres reinforced polymer composite.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
343
356
https://ejchem.journals.ekb.eg/article_15126_2d2168ea77617c6d09874fb850005199.pdf
dx.doi.org/10.21608/ejchem.2018.4827.1429
BSA Binding Studies of Co(II), Ni(II) and Cu(II) Metal Complexes of Schiff base Derived from 2-hydroxy-4-methoxybenzaldehyde and 2-amino-6-methylbenzothiazole
Madhuri
Chaurasia
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, JLN-Marg, New Delhi-110002, India
author
Deepak
Tomar
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, JLN-Marg, New Delhi-110002, India
author
Sulekh
Chandra
Department of Chemistry, Zakir Husain Delhi College, University of Delhi, New Delhi-110001, India
author
text
article
2019
eng
The synthesis of Schiff base HL has been done by taking an equimolar ratio of 2-hydroxy-4-methoxybenzaldehyde and 2-amino-6-methylbenzothiazole. Ligand HL has been characterized by elemental analysis, IR, 1H NMR, 13C NMR and ESI-mass spectrometry. The metal complexes 1-6 have been synthesized by the reaction of ligand HL with hydrated Co(II), Ni(II) and Cu(II) chlorides in ethanol, in the ligand to metal molar ratio 1:1 and 2:1. The synthesized metal complexes 1-6 were characterized by elemental analysis, molar conductance, electronic spectra, IR, UV-visible and EPR spectra. TGA has been done to check the thermal stablity of ligand as well as metal complexes. Spectral data reveals that the ligand HL acts as uninegative bidentate for all metal complexes. The geometries of metal complexes 1-6 have been given on the basis of spectroscopic studies and optimized by density functional theory. The fluorescence techniques have been used to study the interactions of metal complexes towards bovine serum albumin (BSA). The results revealed that the fluorescence static quenching of BSA by metal complexes 1-6 and entropy driven hydrophobic interactions has been seen which could be useful for further drug design.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
357
372
https://ejchem.journals.ekb.eg/article_15127_5dae86dd36345ae90f1f0fbc040c3e0f.pdf
dx.doi.org/10.21608/ejchem.2018.4907.1434
Recovery of Zinc from Zinc Dross Using Pyrometallurgical and Electrochemical Methods
Ibrahim
Ghayad
Corrosion Control & Surface Protection Lab., Metals Technology Dept., Central Metallurgical Research and Development Institute
author
Aida L.
El-Ansary
Dept. of chemistry, Faculty of Science, Cairo University
author
Zeinab
Abdel Aziz
CMRDI
author
Amany A.
El-Akshr
Higher Institute of Engineering at 15th May City, Egypt
author
text
article
2019
eng
Recovery of zinc from its dross was investigated using electrochemical and pyrometallurgical methods. Almost 100% pure zinc was obtained using these methods. A small bench scale system for the investigating the recovery of zinc using pyrometallurgical methods was developed. The system based on the evaporation of zinc (in the dross) at 1050oC and condensing zinc vapors into pure zinc in a separate crucible. Almost pure Zn (99.95%) is obtained using this method. Recovery of zinc was also performed using electrowinning from acidified zinc sulfate bath and electrorefining of zinc dross anodes in alkaline ammonia bath. In either method different parameters including current density and deposition time were addressed. Zinc powder of almost 100% purity was obtained.
Egyptian Journal of Chemistry
National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRT
0449-2285
62
v.
2
no.
2019
373
384
https://ejchem.journals.ekb.eg/article_15186_252fef6dd92f8d920b35f373e7cd2714.pdf
dx.doi.org/10.21608/ejchem.2018.2782.1225