2024-03-29T17:43:13Z
https://ejchem.journals.ekb.eg/?_action=export&rf=summon&issue=6215
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Nano Formulated Soy Proteins for Improvement of Beef Burgers Quality
Dina E. H.
Azab
Yehia A.
Heikal
Taher A.
Salaheldin
Amal A.
Hassan
Ferial M.
Abu- Salem
Beef burgers produced using 100% meat as the primary source present are of lower quality than burgers produced with soy proteins. The growing field of nanotechnology presents the potential for further improvement in the cooking properties of beef burgers. This study was conducted to improve the quality characteristics of the beef burger through the usage of nano soy protein particles and nano glycinin protein. Ultrasonic cavitation was used to synthesize the nano proteins. The obtained nano proteins were characterized to evaluate zeta potential, particle size distribution, crystallite and polydispersity index, as well as functional properties such as water holding capacity, oil holding capacity, hydrophobicity, solubility and emulsion properties. Beef burger quality was evaluated by comparing cooking loss, cooking yield, shrinkage, and pH with control negative. The results showed the shrinkage and cooking loss of nano beef burgers decreased in nano soy protein and nano glycinin samples compared with soy protein isolate and glycinin burgers during storage period. The nano glycinin protein exhibited the highest cooking yield among all proteins and was significantly higher (𝑃 ≤ 0.05) than control negative. After storage, percent shrinkage was significantly lower (𝑃 ≤ 0.05) for nano soy protein and nano glycinin (18 and 17.8 %, respectively) than control negative (30%). Plasticity for nano soy protein and nano glycinin (4.42 and 4.23, respectively) increase compared with control negative burger (3.7) after 3 months. The addition of nano formulated proteins to beef burger improved the cooking quality of the meat product.
Nanotechnology
Nano soy proteins
Nano glycinin
Ultrasonication
Beef burger
2019
07
01
1167
1184
https://ejchem.journals.ekb.eg/article_24403_e1051bda6793b7b749d3bbf4bd22e10a.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Recent Developments on Wettability Treatment of Wool and Polyester Textiles
Omaima
Allam
The present abstract is an overview of the advancements methods on wettability treatment of wool and polyester textiles. Article will emphasize the potential advantage of the use of these cutting edge strategies for treatment to reach to ideal treatment conditions and the best outcomes, particularly hydrophobicity, dampness substance and increment coloring handling while at the same time keeping up the physical and concoction properties of every material. Treatments divided into: chemical treatment, enzymatic treatment and physical treatment such as: alkoxides, plasma technology and microwave irradiation.
wettability
wool
Polyester and Treatment
2019
07
01
1185
1195
https://ejchem.journals.ekb.eg/article_26371_306e1ed45978b5e9ce4c4de95389d431.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Synthesis, Solvatochromic Properties and pH Sensory of Novel Symmetrical Bis(Tricyanofuran)hydrazone Chromophore
Sherif
Abdelmoez
Meram
Abdelrahman
Tawfik
Khattab
Novel symmetrical bis(tricyanofuran) chromophore comprising a hydrazone group was prepared and characterized in order to study its solvatochromism and pH-sensory properties. The preparation of the bis(tricyanofuran)hydrazone chromophore was achieved via a diazo-coupling reaction of benzidine bis(diazonium) salt with tricyanofuran. The chemical structure of the prepared chromophore was confirmed via nuclear magnetic resonance spectroscopy (1H and 13CNMR), Fourier-transform infrared spectroscopy (FTIR), elemental analysis (C, H, N). The UV-visible absorption spectra displayed an interesting solvatochromism in different solvents depending on the polarity of the applied solvent. The pH molecular switching was stimulated under a reversible deprotonation-protonation structural change in acetone solution demonstrating color change from red to violet depending on the pH of the medium from acidic to alkaline, respectively.
Bis-tricyanofuran
hydrazone
Solvatochromism
pH sensory
2019
07
01
1197
1206
https://ejchem.journals.ekb.eg/article_24517_ba29d40432cb93d2f2197382f1f24f67.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Removal of COD from Landfill Leachate by Predication and Evaluation of Multiple Linear Regression (MLR) Model and Fenton process
Anita
Roudi
Shreeshivadasan
Chelliapan
Hesam
Kamyab
Mohd Fadhil
Md Din
Santhana
Krishnan
Municipal Solid Waste (MSW) landfill leachate contains highly concentrated organic substances which are hazardous to the environment. Therefore, it must be treated before discharged into water bodies and suitable techniques are essential for effective treatment. In this regard, multiple linear regression (MLR) model has shown to be a favorable technique for optimization of landfill leachate treatment. In this study, four operational variables, H2O2:Fe2+ ratio, pH, reaction time, and Fe2+ concentration, were assessed using the model. The chemical oxygen demand (COD) removal was 96.43% by experiment, while the predicted assessment was 100% under the optimized settings; time = 33.87 min, concentration of Fe2+ = 749.64 mg/L, pH = 3, and ratio of H2O2:Fe2+ = 2 during Fenton treatment. The high value of the coefficient of determination, R2 = 0.896, designates a resilient relationship between the experimental and model values. The residual study (residual plot) specified that the points were randomly distributed, confirming the appropriateness of the model. The MLR model established may possibly be used for assessment of other landfill leachate treatment.
Leachate
Fenton
Multiple Linear Regression (MLR)
Chemical oxygen demand (COD)
2019
07
01
1207
1218
https://ejchem.journals.ekb.eg/article_25261_84a1019b85f905677c5094f1384db826.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Studies On Some Thiazolidinones As Antioxidants For Local Base Oil
Hoda
Mohammed
Sayed
Attia
Maher
nessim
Mohamed
Shaaban
Ali
El-Bassoussi
In this work, 5 Thiazolidinone derivatives of the type 5-benzylidene -2-(1-piperidinyl)-4-oxo-1,3-thiazolidine (101), 5-(4-butoxybenzylidene)-2-(1-piperidinyl)-4-oxo-1,3-thiazolidine (102), 5-(4-hexyloxybenzylidene)-2-(1-piperidinyl)-4-oxo-1,3-thiazolidine (103), 5-(4-octyloxybenzylidene)-2-(1-piperidinyl)-4-oxo-1,3-thiazolidine (104) and 5-(4-decyloxybenzylidene)-2-(1-piperidinyl)-4-oxo-1,3-thiazolidine (105) are synthesized and characterized using conventional tools analyses. They are tested as antioxidants for local base stock and the efficiency of these compounds, as antioxidants, was monitored through studying the change in total acid number and viscosity, the results reveal that the efficiency order is ranked as follows 105> 104> 103> 102> 101. The quantum chemical parameters such as the lowest unoccupied molecular orbital (LUMO), the highest occupied molecular orbital (HOMO) energy levels and the energy gap (EHOMO-ELUMO) were calculated. The experimental results were on the same line with the quantum chemical calculations.
Base stock
antioxidants
Oxidation stability
Total acid number
Viscosity and Thiazolidinones
2019
07
01
1219
1234
https://ejchem.journals.ekb.eg/article_26372_cdeb7b4a516f2ae51b9dccca2a4d9585.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Geometrical and Topological Descriptors for Activities Modeling of some Potent Inhibitors against Mycobacterium Tuberculosis: A Genetic Functional Approach
SHOLA
ELIJAH ADENIJI
Abstract: : Improvement on more potent anti-tuberculosis agents is as a result of emergence of multi-drug resistant strains of M. Tuberculosis. Syntheses of novel compounds are usually by trial approach with lots of errors which is time consuming and expensive. QSAR is a theoretical approach, which has the potential to reduce the aforementioned problem in discovering new potent drugs against M. Tuberculosis. This approach was employed to develop multivariate QSAR model to correlate the chemical structures of the 1,2,4-triazole analogues with their observed activities using a theoretical approach. In order to build the robust QSAR model, the best descriptors that could efficiently predict the activities of the inhibitory agents were selected by employing Genetic Function Approximation (GFA) as a modeling tool. Correlation coefficient (R2) of 0.9142, cross validation coefficient (Q_cv^2) value of 0.8324 and adjusted correlation coefficient (R2 adj) value of 0.8851 were the internal validation test conducted to access the derived model while (R2test) of 0.7495 and Y-randomization Coefficient (cR_p^2) of 0.7334 were the external validation tests to confirmed the robustness of the built model. The proposed QSAR model provides a valuable approach for modification of the lead compound, design and synthesizing of more potent anti-tubercular agents.
Applicability domain
Genetic Function Approximation
QSAR
tuberculosis
triazole
2019
07
01
1235
1247
https://ejchem.journals.ekb.eg/article_25475_3ccebb4578b5c71d0500ee3b0bee47e8.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
The Impact of Nanotechnologies on developing the printing of natural fabrics with pomegranate peel
Amira
Ragheb
Mohamed
Mosaad
Somaia
Mahmoud
Jacklin
Abd thaloth
In present work, different natural fabrics (cotton, wool and silk) were printed via pomegranate peel dye. The dye solution subjected to ultrasonic to reach the nano size. Two techniques of mordanting were used, (pre-mordanting and simultaneous mordanting); substrates were mordanted prior to printing process using two ecofriendly mordants separately: Alum and tannic acid, other substrates were printed via paste incorporated with mordant for comparison. Pomegranate peel natural dye was studied to clarify the impact of nature of nano-size color particles on size, shape, and particle distribution of the natural dye with comparative studies of the K/S and over all fastness properties of printed samples. Results showed that the K/S values of nano samples are higher than original samples, irrespective of the nature of the fabric used and /or the concentration of the coloring matter. Nano-pomegranate peel dye could be used successfully instead of the original dye incorporated with Alum mordant irrespective of the fabric used. In addition, pre-mordanting technique acquired the higher K/S values than the simultaneous mordanting technique. There is a tendency of improvement of the perspiration fastness while keeping the washing and rubbing fastness unaltered after miniaturization of the pomegranate dye.
textile
printing
Nanotechnology
Pomegranate peel
natural fabrics
Eco-friendly
2019
07
01
1249
1261
https://ejchem.journals.ekb.eg/article_26374_f4ef00d0f9e3704856a374f9d78bc3e5.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Effect of Lambda-Cyahalothrin as Nanopesticide on Cotton Leafworm, Spodoptera littoralis (Boisd.)
Khaled
Ahmed
Wafai
Mikhail
Hassan
Sobhy
Eman
Radwan
Taher
El Din
Ahmed
Youssef
The cotton leafworm Spodoptera littoralis is the most devastating insect pests to many crop plants. The overuse of pesticides increased their resistance in all pests. This study has been devote to develop a novel synthetic scheme to produce pesticide nanocomposite of very high efficiency compared to its original ones. The method is based on using silver nanoparticles (AgNPS) as a pesticide carrier by loading the pyrethroid pesticide Lambda-cyhalothrin (L-CYN) into the surface of prepared AgNPS. The nature of binding has been investigate via TEM and FT-IR techniques. The new formulation of the pesticide nanocomposite AgNPS@L-CYN has been teste for its larvicidal activity against second instar larvae of lab and field cotton leafworm. Our findings indicate that silver lambda-cyhalothrin nanocomposite is more effective on cotton leafworm larvae than that of formulated lambda-cyhalothrin alone. The required concentration for control of cotton leafworm decreased more than 37 times. This approach might be successful ones for decreasing the resistance of this pest to pesticides and reduce environmental pollution.
Cotton leafworm
Spodoptera littoralis
lambda-cyhalothrin Pesticide
Pyrethroid pesticide
silver nanoparticles
Nanocomposite
2019
07
01
1263
1275
https://ejchem.journals.ekb.eg/article_26375_2d606fe4af403608ce742f1207a5618e.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Synthesis and Characterization of Freeze Dryer Chitosan Nano particles as Multi functional Eco-Friendly Finish for Fabricating Easy Care and Antibacterial Cotton Textiles
Mahmoud
Morsy
Khaled
Mostafa
Heba
Amyn
Amal
El-Ebissy
Ali
Salah
Mohamed
Youssef
Antibacterial and easy care characteristics were imparted to cotton fabrics using multifinishing formulation comprising citric acid (CA) and chitosan nanoparticles (CNPs) as an eco-friendly finish. The latter of size around 60-100 nm were prepared through polymerization of meth acrylic acid (MAA) with chitosan using potassium permanganate as initiator and characterized using scanning electron microscope, transmittance electron microscope, Fourier transformer infrared spectroscopy, particle size analyzer, X-ray diffraction and thermo gravimetric analysis. Different factors affecting the degree of multifinishing treatment and their onset on fabric performance and antimicrobial activity were studied and optimized according to pad dry cure method. This was done to see the impact of chitosan nanoparticles to accomplish multifunction characteristics on cotton fabrics like reasonable strength loss, comparable wrinkle recovery angles, elongation at break, higher fabric stiffness and suitable durability in addition to antibacterial activity. It was seen from the attained results that; FTIR spectra and SEM micrograph showed the change in chemical structure and surface morphology of cotton fabric before and after finishing in absence and presence of chitosan nanoparticles. These fabrics parade antimicrobial activity against gram-positive and gram-negative bacteria tested even after 10 washing cycles. Mechanism of finishing of cotton fabric using citric acid and CNPs is identified.
Chitosan nanoparticles
Esterification
tensile strength
Stiffness, Antibacterial effect
2019
07
01
1277
1293
https://ejchem.journals.ekb.eg/article_26376_86358fc94533b1f100f30950bbf9da1e.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Adsorption of Cu onto Maize Husk Lignocellulose in Single and Binary Cu-Zn Solution Systems: Equilibrium, Isotherm, Kinetic, Thermodynamic and Mechanistic Studies
Chidi
Duru
Maryjane
Nnabuchi
Ijeoma
Duru
Adsorption of Cu onto maize husk in single and Cu-Zn binary aqueous solutions was compared. Equilibrium adsorption studies showed that Cu in the single solution system packed vertically on the surface of the adsorbent but penetrated into the porous network of the adsorbent in the binary solution system. Data from the isotherm studies in the single and binary systems were well fitted in the Freundlich model, with linear regression correlation coefficient values (R2) 0.764 and 0.994 respectively. The n values from this model indicated that Cu ions were chemisorbed on the adsorbent in the two solution systems but formed stronger bonds in the binary solution. Adsorption capacity of the adsorbent for Cu in the single solution was 1.21 mg/g but increased to 1.63 mg/g, 1.67 mg/g and 1.84 mg/g in the 2:1, 2:2 and 1:2 Cu:Zn binary solutions respectively. Adsorption of Cu in all the solution systems were spontaneous, with the 1:2 binary solution been the most energy efficient system. Selectivity of Cu ions in the equimolar Cu:Zn binary solution was synergistic. The marked reduction in the percentage content of calcium and potassium on the adsorbent when it was contacted with the Zn and Cu-Zn solutions showed that these elements were exchanged with Cu and Zn on the adsorbent matrix. Shift in absorption band at the R–OH functional group on the adsorbents in all the studied solution systems showed that complexation of metal ions occurred at these points. The disappearance of the carboxylic acid –OH absorption band on the husk in the Cu ion solution system was an indication that an additional adsorption site was involved in the complexation of Cu on the adsorbent. The findings from this study showed that using maize husk as adsorbent, copper adsorption is more enhanced in the presence of zinc ions in binary solutions of the two heavy metals.
Maize husk
Isotherm
Chemisorption
Synergistic
Complexation
ion exchange
2019
07
01
1295
1305
https://ejchem.journals.ekb.eg/article_26425_990b9c4382a60b3ce22635ca8aed0591.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Using Some of Ordinary Fibers and Microfibers to Produce Knee Support for Women to Improve Function Performance
Dina M.
Hamoda
Abstract : The aim of this research is for achieving best fiber material (microfibers) for the production of knee support for women by improving their function of Performance & fabric properties (absorption-compression-resistant fabric for explosion-pilling-air permeability & static electricity). The experimental work was done at the NRC IN Cairo for measuring the knee support efficiency. Six knee support samples were produced with a manual crochet structure with (100%microfiber acrylic)-(50%-50%microfiber acrylic-viscose)-(92%-8%micro fibers acrylic-elastic)- 100%cotton - 100%acrylic-(55%-45% acrylic-cotton).this samples were applied on women at the ages between 40-60 years old they suffer from roughness of knee joint , the experimental method was done according to standard test methods. Which relies on analytical test samples produced under the research &then analyze the data & expressed .According to the quality assessment by radar chart for all measuring, it was found that sample (cotton100%) & the sample (microfibers acrylic-viscose50%:50 %) scored the high quality factor. A questionnaire was done to evaluate the produced sample applied at women and according to practical application sample (microfibers acrylic-viscose / 50:50 %) achieved the best sample for comfort wearing properties.
Microfibers
Knee support
High performance
Medical fabric
Crochet acrylic-Viscose
2019
07
01
1307
1316
https://ejchem.journals.ekb.eg/article_26427_f460f1cc6816e0725adf0415eb2f1a7f.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Spectrofluorometric Determination of Alpha Fetoprotein in different serum samples of Liver Cancer by Tb-acetyl acetone complex embedded in Polymethylmethacrylate optical sensor
Safwat A.
Mahmoud
Mostafa A.
El-Aasser
Mohamed
Attia
A simple, precise and sensitive method in which, Tb-acetyl acetone (Tb-ACAC) complex embedded in polymethylmethacrylate (PMMA) is used for the early diagnosis of liver cancer. The diagnosis process depends on the assessment of the concentration of alpha fetoprotein (AFP) in the serum samples of different liver patients. The Tb-acetyl acetone (Tb-ACAC) embedded in PMMA has strong emission band at 545 nm after excitation at 350 nm in ethanol. The assessment of alpha fetoprotein (AFP) depends on the quenching of the emission band at 545 nm in ethanol by the alpha fetoprotein (AFP). The calibration plot was achieved over the concentration 1 - 550 ng/mL with a correlation coefficient of 0.99 and a detection limit of 0.5 ng/mL. The method was used satisfactorily for the diagnosis of liver cancer in a number of serum samples collected from various patients and health state; healthy (≤ 10 ng/mL) and HCC (400–550 ng/mL).
Alpha fetoprotein
Polymethylmethacrylate, Tb-Acetylacetone, Optical Sensor
liver cancer
2019
07
01
1317
1325
https://ejchem.journals.ekb.eg/article_26725_72e544a19a2e0cc80569877c05ace79f.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Design of A Prototype Reactor For Fuel Oil Production From Waste Tires Using Pyrolysis Process
Uthman
Dawoud
Ayman
El-Gendi
Yousef Ali
Alkuraimi
Management of waste is a comprehensive challenge that effects the sustainability of eco-friendly and economic improvements. This work intended to design a prototype to produce fuel oil from waste tires by Pyrolysis process. Thus, we are looking for a new source of energy to have a benefit from waste tires which is a hazardous waste, and it causes a real problem for health and environment. In the development of the kingdom of Saudi Arabia which exactly what our government considers, and places as one of the biggest goals that is to find another source for energy in their vision 2030 for kingdom economy’s future. The prototype design is a batch reactor, and a try to achieve the best yield of fuel oil product. The result showed that, the average density of the produced fuel oil is 0.783 g/cc, and it is close to the diesel range, which is between 0.8 to 0.95 g/cc, also it is near the range of natural gasoline, which is between 0.711 to 0.737 g/cc. Consequently, the produced fuel oil is comparable with the diesel and natural gas.
Fuel Oil
production
Wasted Tires
Pyrolysis Process
2019
07
01
1327
1334
https://ejchem.journals.ekb.eg/article_27047_abc5f4ec80087414181fbbf14fb4b83a.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
AFM and SEM analysis of polystyrene Surface Treated by DC Pseudo Plasma Discharge
D
Moubarak
M
Abd Al-Halim
A.
Abu-Hashem
Yahia
Elbashar
In this work, the surface treatment of polystyrene using the DC Pseudo-Plasma is studied. First, the DC Pseudo-plasma was employed as a function of plasma device parameters under different operating conditions including time (t) (30 s), current (I) (15mA), distance (d) (3 mm) between inter-electrodes, mesh anode transparency (T) (19 %), distance between the polystyrene sample and the mesh anode (D) (2 mm) and air pressure in plasma exposuring system (P) (2 torr). The best optimization of these parameters were performed by the water absorbency, which supported by the Scanning Electron Microscope (SEM) test Atomic Force Microscope (AFM) test.
DC pseudo plasma discharge
polystyrene
Surface treatment
2019
07
01
1335
1341
https://ejchem.journals.ekb.eg/article_27150_874f4a683578b809a4f0e53b4ac9dc25.pdf
Egyptian Journal of Chemistry
Egypt. J. Chem.
0449-2285
0449-2285
2019
62
7
Effect of Water to Cement Ratio (w/c) and Age on The Ultrasonic and Electrical Non-Destructive Testing (NDT) of Plain and Chemical Admixtured Concrete
Mahmoud
El-Gazery
M.
Ali
The ultrasonic velocity, the electrical resistivity and the compressive strength of plain (N), accelerating admixture (A), high range water reducing admixture (H), and retarder admixture (R) concrete samples of 0.35, 0.42, 0.55 and 0.6 w/c ratios were measured, The effect of concrete age on the samples with 0.42 water to cement (w/c) ratio were studied. The results show that, the ultrasonic velocity, the electrical resistivity and the compressive strength are inversely proportional to the w/c ratio for all samples and at the same w/c ratio the values of these parameters for the high range water reducing admixture (H) concrete, are relatively higher than that of the accelerating admixture (A) concrete then the Plain (N) concrete, then, retarder admixture (R) concrete. For the samples with different ages, the results show that, the ultrasonic velocity, the electrical resistivity and the compressive strength increase rapidly at first 7 days, after that, the increment slows down significantly after 28 day, and at the same age, the values of theses parameters of the accelerating admixture concrete sample (A4) are higher than that of the other samples {high range water reducing concrete (H4), plain concrete (N4) - retarded concrete (R4)} The destructive compressive strength was correlated to the nondestructive ultrasonic velocity and electrical resistivity measurements. Linear relationships between the compressive strength and either the ultrasonic velocity or the electrical resistivity were obtained. The results were attributed to the hardening and the microstructure development in the different concrete samples
ultrasonic velocity
electrical resistivity compressive strength
w/c ratio
plain concrete
accelerating admixture
high range water reducing admixture
retarder admixture Nondestructive testing
chemical admixture
2019
07
30
1343
1357
https://ejchem.journals.ekb.eg/article_45234_4ef2ede2db8edbf52df96d030773ed2d.pdf