National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228559120160228Combined Printing and Creation of A “Host Guest” Functional Textile for Depositing Fragrance11933310.21608/ejchem.2016.333ENJournal Article20151207HE EFFECT of chemical modification of cotton and cellulosic portion of its blend with polyester with reactive cyclodextrin R-CD on its printability with reactive dye as well as its ability to keep fragrance was thoroughly investigated. The results obtained indicate that, the extent of reaction expressed as %N increases by increasing R-CD concentration. The K/S of R-CD modified samples is relatively higher than the untreated samples for both cotton and its blend with polyester, while the overall colour fastness properties are nearly the same. In case of incorporation of R-CD to the printing paste, the K/S increases as the amount of R-CD increases from 50 to 75 g/Kg printing paste, on increasing the amount of R-CD to 100g the opposite holds true. The effect of treatment with different perfume oils viz. vanelline, rose, jasmine and sandal on ability of the treated fabrics to keep fragrance upon storing for 2, 20, 30, 37 and 90 days was also investigated. It was found that the ability to keep fragrance increases by increasing the extent of reaction expressed as % N and decreases by increasing storing time (up to 3 months) and it depends on the kind of the perfume oil, where it can be arranged according to the order: sandal ˃ jasmine ˃ rose ˃ vanelline oil. Application of the obtained results was also done for scented ladies wear in innovation designs coloured with bifunctional reactive dye.<br /><br />National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228559120160228Isolation and Identification of Some Chemical Constituents and Antimicrobial Activity of Two Lamiaceae Plants Growing in Saini213133410.21608/ejchem.2016.334ENJournal Article20160204TWO plants known as Nepeta septemcrenata (N.S.) and Otostegia fruticosa (O.F.) of family Lamiaceae were chosen for the present study. The volatile oils (V. oil) of aerial parts of both plants were isolated by hydrodistillation method and their constituents were identified using GC/MS analysis. It was found that nepetalactone (53.65%) and caryophylline oxide (60.86%) are the main components in both N.S. and O.F., respectively. The lipid constituents were extracted with pet. ether and fractionated to fatty alcohols, unsaponifiable materials and fatty acids which were identified by GLC analyses. The antimicrobial activity of different extracts of both plants (V. oil, pet. Ether, Fatty alc., Fatty acids (F. acids), 70% methanol, Chloroform and Ethyl acetate)were evaluated using disc diffusion method against gram positive and gram negative bacteria in addition to fungi. The results proved that, the V. oil and ethyl acetate extract of N.S. are the most effective on E. coli, while, the F. acids fraction and 70% alc. extract of O.F. exhibited the highest activity against Staphylococcus aurous and Asparaglus niger , respectivelyNational Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228559120160228Technological Evaluation of Cellulose Carbamate Synthesized from Rice Straw and its Utilization as Dye Adsorbent334433510.21608/ejchem.2016.335ENJournal Article20150825 EGYPTIAN rice straw was subjected to pulping via alkali ……scouring followed by hypochloric bleaching. The obtained cellulosic pulp was allowed to react with two different amounts of urea at high temperature to obtain cellulose carbamate acquire nitrogen content of 0.13 and 0.16 on using 10 and 20 g urea/100g cellulose, pulp, respectively. The obtained carbamate derivatives were evaluated as dye adsorbent for different reactive dyes.<br />Different factors were investigated as the nature of colour used, the technique applied, the time of treatment, and concentration of dyes used. It wa s found that the magnitude of the adsorbed colour depends on the N %, whereas the %N increases the % colour removal increases too. As the concentration of the dye increases from 0.01 to 0.5g/ 1000ml, the colour removal % decreases regularly. It is clear from the obtained results that the % colour removal as well as the time to reach the maximum colour removal percent depend on: a) the nature of the reactive dye used, (b) the degree of carbamation expressed as % N and (c) the technique applied.<br /><br />National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228559120160228Antimicrobial and Haemostatic Effect of Chitosan/ Polyacrylic Acid Hybrid Membranes455733610.21608/ejchem.2016.336ENJournal Article20150329CHITOSAN/ polyacrylic acid membranes containing different ……amounts of Al2(SO4) and/or TiO2 were prepared. The prepared membranes were characterized by measuring mechanical properties, such as tensile strength and elongation at break, swelling properties, antimicrobial and blood clotting. The results obtained indicate that the presence of Al2(SO4) and TiO2 in the membrane formulations has an incremental effect on the antimicrobial properties and blood clotting in albino rates.<br />Keywords: Chitosan, Acrylic acid, Antibacterial, Blood clotting and Membrane.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228559120160228Improvement of the Rheological Properties of Local Bentonite Clay Using New Blending Polymers for Water - based Drilling Fluids597833710.21608/ejchem.2016.337ENJournal Article20151201NEW composition polymers formulated from the reaction of different …… mixed polymers by using gamma (ᵞ) radiation technology. A fixed ratio of polyvinylalchol (PVA), chitosan was mixed with different ratios of N-vinyl-2-pyrolidene (NVP) with and without diethyleglycal dimethylacrylate (DEDMA). The chemical structures of the prepared composition polymers were conformed using FT-IR and the molecular weight determination by (GPC). The results of the spectroscopic analysis indicate that they were prepared through right method and they have high purity. The new prepared composition polymers were evaluated as a viscosifier and filter loss additives for water-based drilling fluid formulated from local Egyptian clay to improve their rheological properties. The evaluation includes the study of rheological, filtration of the water – based mud treated with the new prepared composition polymers and the results were compared to the reference commercial water based- mud. The results of treatment of water-based mud with the prepared new composition polymers showed a good efficiency.<br /> National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228559120160228Nanotechnology Application in Garments for Healthcare Workers799733810.21608/ejchem.2016.338ENJournal Article20151206THE SAFETY of healthcare workers has become a serious concern; …..therefore, a need for protection against bacterial penetration and transmission is realized. The purpose of this study is to investigate the functional and antimicrobial properties of cotton: polyester woven fabrics used as garment for healthcare workers uniforms (HCWU). (silver nanoparticles) AgNPs nano finish material is used as antimicrobial agent. The effect of polyester ratio and AgNPs concentration on tensile, water absorbance and antimicrobial properties of these fabrics has been examined. The findings of this study revealed AgNPs can be used effectively as an antimicrobial agent for woven cotton: polyester blended fabrics. The tensile strength, breaking extension, water absorbance of blended woven fabrics are significantly affected by the polyester percentage and the concentration of AgNPs. The produced fabrics were used in garments supplement design for healthcare workers such as doctors, nurse’s uniforms.<br /><br />National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228559120160228Novel Nanopigment Derived from Vat dyes for Printing Cotton Fabrics9911433910.21608/ejchem.2016.339ENJournal Article20151213WATER insoluble organic pigments presented by vat dyes were …… converted to the soluble leuco form through reduction using different reducing agents. The latter include Glucose, β-Cyclodextrin, sodium sulfoxylate formaldehyde (Rongalite C), and Redoxal Z reducing agent based on zinc sulfoxylate. The leuco form was then submitted to sudden oxidation using sodium perborate in presence of acetic acid under sonication. The obtained nano-sized pigment particles were used for printing cotton fabrics , and the color strength (K/S) of the prints were monitored. Results disclose that the K/S values for nanopigment prepared under Cyclodextrin reduction are nearly the same, if not higher than those obtained using sulfer-based reducing agents (Rongalate and Redoxal), while Glucose brings about the lowest K/S values. Four vat dyes have been used in the current work, and results of concern verify that the size of nanopigment obtained and the colour strength values (K/S) are manifestation of nature of the dye including molecular size and structure and molecular configuration. Regardless of the type of reducing agent used and/or the method of fixation, the highest K/S values are obtained with nanopigment dispersion prepared using 125g/L reducing agent at pH 7. Under these conditions, a homogeneous morphology with quite uniform particle size distribution in the range of 6-16 nm could be achieved vis-á-via 160-280nm for the blank Cibanon Golden Yellow RK vat dye.National Information and Documentation Centre (NIDOC), Academy of Scientific Research and Technology, ASRTEgyptian Journal of Chemistry0449-228559120160228Synthesis and Characterization of Thiazole Derivatives and Evaluating their Performance as Additives in Polyurethane Coating115129137510.21608/ejchem.2016.1375ENJournal Article20160218IN the last few decades, a lot of work has been done on thiazole ….derivatives due to their versatile utility associated with them. Thiazole derivatives have been reported to exhibit biological activity and are widely used as pharmaceuticals. In this research, a series of thiazole derivatives were prepared, the structures of the products were established by elemental analysis, FTIR, 1H NMR and mass spectroscopy. The prepared thiazole derivatives A, B and C, were incorporated physically into polyurethane coating as an additive. Experimental coatings were manufactured on a laboratory scale and applied by brush on steel and wood panels. The coated films were screened against Gram-negative bacteria, Gram-positive bacteria and fungi to evaluate the antimicrobial activity of the prepared thiazole derivatives. A flame retardant property of the prepared thiazole derivative compounds was evaluated by measuring the limiting oxygen index (LOI) of the coated films. The mechanical properties of these coated films were also examined to evaluate the drawbacks of the thiazole derivative additive. The obtained results showed that, the physical incorporation of thiazole derivative have led to improve the antimicrobial, flame retardancy and mechanical properties of polyurethane coating.<br /><br />