bluuebunny/crossref_metadata_2025_split huggingface dataset:
Markers characterizing corneal damage during aging of rat
Authors: El-Sayyad Hassan I. H. , El-Mansi Ahmed A. , Guida Mona S , Mohammed Ezaldin AM 
Published: May 2018

Aging is a biological phenomenon that involves an increase of oxidative stress associated with gradual degradation of the structure and function of the cornea. Gender differences and subsequent deterioration of cornea is an interesting topic, especially yet few data are available concerning the impact of age, especially on the corneal. One hundred male and female Wistar albino rats ages 3, 6, 18, 24, and 30 months (n=10 equal for male and female) were used. At the time interval, cornea were investigated by light and transmission electron microscopy (TEM), immunohistochemistry of caspase 3 (casp3), glial fibrillar acidic protein(GFAP) and CD45 and flow cytometry of DNA, bcl-2-like protein 4 (BAX), transforming growth factor beta (TGF-β) and Cd45 (lymphocyte common antigen). Light and TEM investigation revealed apparent deterioration of atrophy of corneal epithelium with vesicular vacuolar degeneration, hyalinization of stromal collagen fibrils and swelling and degeneration of the endothelial lining the descemet's membrane. There was apparent loss of keratocytes within corneal stroma. Immunohistochemistry of casp 3 and CD45 were markedly increased manifesting cell damage. GFAP showed apparent reduction of innervation of corneal stroma and endothelium layer. Flow cytometry of DNA, Bax and TGF revealed increased apoptic cell death of cornea of 30M-old rats. We concluded that aging contributed to an apparent increase of cellular damage of different corneal region associated with alterations of cell markers.
Metal containing composites based on styrene copolymers and butoxyl methyl methacrylate as a catalyst in the oxidation of the diesel fraction
Authors: Abbasov V.M. , İbragimova M.C. , Guliyev A.D. , Ibragimova T.A. , Efendiyeva L.M. , Nagiyev V.A. , Seidova S.A. 
Published: May 2018

The article presents the results of studies on the metal-based composites on the basis of copolymers and block copolymers of styrene with butoxymethyl methacrylate (BOMMA) as a catalyst in the oxidation process of naphthene paraffin fraction, which was obtained by extraction method of dearomatization of diesel fraction. It was shown that at low concentrations of metals of variable valency in the content of the catalyst here is sufficiently high yield of synthetic petroleum acids.
UTILIZATION OF AQUEOUS, METHANOL AND CHLOROFORM EXTRACTS OF LOCAL PLANTS- IXORA COCCINEA AND HIBISCUS SABDARRIFFA (ZOBO) FROM ABAKALIKI AS FABRIC DYES
Authors: C Nwokonkwo Dorothy 
Published: May 2018

This investigation dealt with the dyeing and fastness properties of crude constituents of Ixora coccinea and Hibiscus sabdarriffa plant species extracted using distilled water, methanol and chloroform. Approximately 150 g of each sample was soaked in the chosen solvent for four weeks, the percentage yields of the aqueous, methanol and chloroform extracts of Ixora coccinea were 38.47% and 13.40 % and 3.88 % respectively; Hibiscus sabdariffa gave yields of 22.85 % for the aqueous extract, 12.24 % for the methanol extract and 3.79 % for the chloroform extract. Aqueous, methanol and chloroform extracts of Ixora coccinea were all pink in colour; Hibiscus sabdariffa gave red aqueous extract, red methanol extract and orange chloroform extract. The extracts were used without further purification in dyeing unmordanted and mordanted cotton and polyester fabrics. Different colour shades were obtained after dyeing. The mordanted fabrics using CuSO4, FeSO4 and K2CrO7 were fast to acid, alkali and washing.Key words dyeing, extract, fastness, mordant, solvent
Silver/Polyethylene Glycol Nanocomposite Thin Films and its Biological Applications
Authors: Fahmy Alaa 
Published: May 2018

The synthesis of silver nanoparticles with different sizes and concentrations was carried out using NaBH4 as a reducing agent and polyethylene glycol (PEG) as a stabilizer. The thin films of PEG embedded with Ag nanoparticles (Ag NPs) were deposited by electrospray deposition technique (ESD) and the morphology of subsequent prepared films was studied by AFM. Structure-property relationships of the colloid and subsequent films were discussed in dependence on the concentration of NaBH4. The synthesized Ag/PEG nanocomposite solution was characterized by UV-visible spectroscopy and Transmission electron microscopy (TEM). Chemical composition in the whole and on the surface of films were investigated by Fourier transform infrared (ATR-IR) and X-ray photoelectron microscopy (XPS), respectively. The UV-visible results indicate to the formation of spherical Ag NPs where the absorption peak was observed at wavelengths around 395 nm. TEM images showed the well dispersion of Ag NPs in the PEG matrix with average particle size of 13 nm. Furthermore, the antimicrobial activity of the nanocmposite was studied. The Ag NPs released from the polymer matrix proven to have a significant antimicrobial activity against S. Pneumonia, B. Subtilis, E. Coli, and A. Fumigates.
Chemical and Electrochemical studies on the corrosion of mild-steel, copper and zinc in 0. 5 M H2SO4 solution in presence of Azithromycin as effective corrosion inhibitor
Authors: Abdullatef O. A 
Published: May 2018

Azithromycin has been tested as inhibitor for steel, copper and zinc corrosion in 0.5 M H2SO4 was studied using potentiodynamic polarization and electrochemical impedance spectroscopy. The results showed that the inhibition efficiency increased with increasing the concentration of Azithromycin. The adsorption characteristics of Azithromycin in presence of steel, copper and zinc metals were studied and the data found to fit the Kinetic-Thermodynamic model. IR spectroscopy of the corrosion product with the inhibitor confirmed the formation of metal ion inhibitor complex.
FORMATION AND PROPERTIES OF CARBON IN POROUS SPACE OF SILICA-ALUMINA CERAMICS
Authors: Vlasova Marina , Rivera-Bahena Catalina Bustos , Dominguez-Patino Gloria , Kakazey Mykola , Tapia Rene Guardian 
Published: May 2018

By using of XRD, IR, SEM methods and microanalysis, it was investigated the process of carbon formation during thermo destruction of sucrose inside pores of silica-alumina ceramics in conditions of oxygen deficient. It was found that for carbon formation inside pores, temperature treatment of sucrose must be 600oC and time of heating 15 min. At such regime of carbonization, carbon material is produced in the form of islets on the surface of pores and in the form of spherical particles of different sizes. Carbon particles present a set of aggregates from chaotic graphene clusters. On surface of carbon particles is formed grapheme oxide. Obtained results show that the carbonized ceramics adsorbs in a good degree the dyes from water solution.
SYNTHESIS AND CHARACTERIZATION OFGOLDNANOPARTICLESUSING CEFOTAXIMSODIUM AND ITS SCHIFF BASE DERIVATIVE WITH 4-N,N-DIMETHYLAMINO BENSALDEHYDEAS REDUCING ANDSTABILIZING AGENTS
Authors: J. Abdulghani Prof. Dr. Ahlam , Hussain Rasha Kudher 
Published: May 2018

Conjugated GNPs were synthesized by one step reaction of AuCl4- with cefotaxim (CFX) and its Schiff base derivative with 4-N,N-dimethylamino benzaldehyde [sodium 3-(acetoxymethyl)-7-((2Z)-2-(2-(4-dimethylamino) benzylideneamino) thiazol-4-yl)-2-(methoxyimino) acetamido)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate] (SCFX)without the need of reducing and functionalizing agents. The reduction process was monitored by uv-visible spectrophotometry and the synthesized GNPs were characterized by TEM, SEM, AFM and XRD analysis. The conjugation of GNPs with the two ligands was characterized by FTIR spectrophotometry. The size, morphology, and stability of GNPs were varied with concentration ratio of ligand/Au(III), pH medium and reaction temperature
COMPLEXATION OF POLYETHYLENE-GLYCOL WITH THE SODIUM SALTS OF CITRIC AND SUCCINIC ACIDS IN THE AQUEOUS SOLUTIONS. STUDIES BY DYNAMIC LIGHT SCATTERING AND UV/VIS SPECTROPHOTOMETRY
Authors: Masimov E.A. , Ismailov Etibar Hummat , Odzhaqverdiyeva S.Y. 
Published: May 2018

Dynamic light scattering (DLS) method in combination with the UV/VIS spectrophotometry is used to study the interaction of polyethylene- glycols with a molecular weight 6000 ( PEG6000 ) with sodium salts of citric and succinic acids in aqueous solutions. The values of density, viscosity, refractive and diffusion indexes, the values of the hydrodynamic diameter, wavelength electronic absorption bands for PEG6000 aqueous solutions, their mixtures with succinic and citric acids are determined. It was shown that depending on the composition of the solutions the values of hydrodynamic diameter for aqueous solutions containing 1-5 wt.% PEG6000 and their mixtures with succinic and citric acids (~ 1 wt%) ranges from 3.6 to 5.2 nm. It is assumed that the formation of complexes with the sizes that are within the above range is due to the features of interaction and the structure of the complexes formed in solution.
The Theta polynomial Θ(G,x) and the Theta index Θ(G) of molecular graph Polycyclic Aromatic Hydrocarbons PAHk
Authors: Gao Wei , FARAHANI MOHAMMAD REZA 
Published: May 2018

The omega polynomial Ω(G,x), for counting qoc strips in molecular graph G was defined by Diudea as with m(G,c), being the number of qoc strips of length c. The Theta polynomial Θ(G,x) and the Theta index Θ(G) of a molecular graph G were defined as Θ(G,x)= and Θ(G)=, respectively.In this paper, we compute the Theta polynomial Θ(G,x) and the Theta index Θ(G) of molecular graph Polycyclic Aromatic Hydrocarbons PAHk, for all positive integer number k.
Investigation of the nanocrytalline SnO2 Synthesized by Homogeneous Precipitation
Authors: Abdel-Salam Mahmoud. N. , Abdel-Rahim M. A. , Gaber A. , Abdel-Latief A. Y. 
Published: May 2018

Nanocrystalline tin dioxide synthesized by the homogeneous pre cipitation method using the reaction of tin tetrachloride pentahydrate and urea solutions has been investigated. The nanocrystalline powder has been traced at different calcination temperatures (300ºC-1050ºC), and then characterized by using Thermogravemetric analysis, differential thermal analysis and x-ray diffraction. The microstructure of the obtained nanoparticles has been examined by scanning and transmission electron microscopy. The average crystallite size, determined by x-ray diffraction, was found to be in the range of 3 –30 nm. The analysis exhibited a tetragonal phase. Optical properties were investigated by a UV–vis absorption spectrophotometer. The calculated optical band gap lies between 4.47–3.71 eV as a result of increasing the calcination temperatures and crystallite size. Surface area and porosity of SnO2 nanoparticles are measured. Specific surface area which is related to pore volume and decreases from 155 m2/g at 100ºC to 3.3 m2/g at 1050ºC.
Automatic Threshold Selections by exploration and exploitation of optimization algorithm in Record Deduplication
Authors: Deepa K. , Vivek C. , Rajan S.Palanivel 
Published: May 2018

A deduplication process uses similarity function to identify the two entries are duplicate or not by setting the threshold. This threshold setting is an important issue to achieve more accuracy and it relies more on human intervention. Swarm Intelligence algorithm such as PSO and ABC have been used for automatic detection of threshold to find the duplicate records. Though the algorithms performed well there is still an insufficiency regarding the solution search equation, which is used to generate new candidate solutions based on the information of previous solutions. The proposed work addressed two problems: first to find the optimal equation using Genetic Algorithm(GA) and next it adopts an modified Artificial Bee Colony (ABC) to get the optimal threshold to detect the duplicate records more accurately and also it reduces human intervention. CORA dataset is considered to analyze the proposed algorithm.
Photoluminescence, laser damage threshold, optical transmittance, FTIR, mechanical, dielectric, thermal and XRD studies on Bis – Glycine hydrochloride single crystal
Authors: Gobinathan L. , Boopathy K. 
Published: May 2018

Single crystals of Bis – glycine hydrochloride (BGHC) were grown from aqueous solution by means of slow evaporation and slow cooling techniques. Single crystal XRD study reveals that the grown BGHC crystallizes in orthorhombic system with space group P212121 and the obtained unit cell parameters are a = 5.32 Å, b = 8.10 Å and c = 18.01 Å. Powder X – ray diffraction pattern of grown BGHC has been indexed. Functional groups present in the BGHC crystals were identified by FT – IR spectral analysis. The transmission and absorption spectra for the grown BGHC crystal shows that the lower cut off wavelength lies at 235 nm. The photoluminescence spectrum of the grown crystal was recorded. Mechanical hardness of the grown BGHC was determined and Vickers microhardness hardness number was calculated. Laser damage threshold study was carried out for the grown crystal using Nd:YAG laser. The thermal stability of the grown crystal was investigated using thermogravimetric analysis and the grown crystal is thermally stable up to 198 °C. Particle size dependent second harmonic generation efficiency of the grown crystal was examined by Kurtz and Perry powder technique using 1064 nm laser.
Experimental investigations on Thermal Performance of Copper with Aluminium Based Finned Heat sinks for Electronics Cooling System
Authors: Loganathan Arulmurugan , Mani Ilangkumaran 
Published: May 2018

An Experimental investigation on the thermal performance of copper with aluminium based finned heat sinks for electronics cooling system was studied. The heat sinks have different material proportions containing major constituent of aluminium and minor constituent of copper. Considered with straight finned heat sink for the experiments for its easiness in fabrication and efficient heat transfer properties. The observational results for aluminium with copper alloy are compared with pure aluminium heat sink. Heat sink geometry, fin pitch and its height were taken from the commercially available heat sinks. In this research work best heat sink geometry is chosen and cooked up with different volume of copper added with aluminium. Selected four different spots of heat sinks and the temperature raising characteristics were measured for natural convection. also the temperature is raised to a fixed temperature and the temperature lowering characteristics were measured in forced convection as the air circulation takes more heat to keep the heat sink temperature within the desired level.
TiO2- CuI Nanoparticle /Ru Solid State Dye-Sensitize Solar Cells
Authors: Taha Samar , Al-Dabag Samer. Y. , Ahmed Sudad. S. , Taher Wasan. J. 
Published: May 2018

In this work solid state dye sensitized solar cell (SSDSSC) type (ITO / TiO2/ Ru / CuI / Ag) is fabricated. The thin films are prepared by pulse laser deposition (PLD) technique under the vacuum pressure of 3×10−3 mbar and annelid at 450 oC. In this technique Nd:YAG laser at 1064 nm wavelength with (200 , 500 , 800) pulsed was used. It was noticed from (I-V) characteristics of the solar cell that the photocurrent collected from the TiO2 (NP) is increase as the number of laser pulses increase. The conversion efficiency of TiO2 is increased from 2.115% up to 5.654% and for CuI from 1.73 % to 5.19 % when the number of pulses increase from 200 up to 800.
EVALUATION OF GROUNDWATER QUALITY OF SIWA OASIS
Authors: Ashour Ammar Mohammad , Wassel M.A. , Sayed A. Z. , EL-Fadl M.M. Abo , Mahmod A.M. 
Published: May 2018

In discussing the water quality evaluation for use in different purposes, the author will briefly examine some of the major important water quality standards. These standards serve as a basis for appraisal of the results of chemical water analysis in terms of suitability of the water for various intended uses. According to total dissolved salts (TDS), major ions as cations ( Ca2+, Mg2+, Na+, K+), anions (CO₃2⁻, HCO₃⁻ ,SO₄2⁻, Cl⁻), with some heavy metals such as Al3+, B3+ , Cd2+, Co2+, Cr3+, Cu2+, Fe3+, Mn2+, Mo2+, Ni2+, Pb2+, Sr2+, V2+ and Zn2+ The results indicate that the samples of Nubian sandstone aquifer is suitable for drinking of human and livestock , suitable for laundry purposes and for irrigation. While the samples of Fractured dolomite limestone aquifer are unsuitable for drinking and irrigation.
Corrosion Inhibition of Zinc Using Some Phenylthiazole Derivatives in Hydrochloric acid Solutions
Authors: Fouda Abdel Aziz , Nazeerb A. Abdel , Khalek K.M.Abdel 
Published: May 2018

The inhibitive action of some phenylthiazole derivatives namely: 2-acetylamino-5-p-bromophenylazo-4-phenylthiazole (BPT), 2-acetylamino-5-p-methylphenylazo-4-phenylthiazole (MPT), 2-acetylamino-5-p-methoxyphenylazo-4-phenylthiazole (XPT) and 2-acetylamino-5-p-nitrophenylazo-4-phenylthiazole (NPT), on zinc corrosion in 0.2 M HCl has been studied using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS)and electrochemical frequency modulation (EFM) measurements. The results showed that the dissolution rate of zinc decreases with increasing the phenylthiazole derivatives concentration and decreases with raising temperature. Polarization curves indicated that the studied inhibitors act as mixed-type inhibitors. The adsorption of the investigated compounds follows Langmuir adsorption isotherm model. The thermodynamic parameters of adsorption and corrosion processes were determined and discussed.
Dinuclear UO2(VI), Th(IV), ZrO(IV) and VO(IV) complexes based on some Schiff-base ligands: Synthesis and structural elucidation
Authors: Mohapatra Ranjan K. , Ghosh S. , Naik P. , Dash D. C. 
Published: May 2018

A series of homo binuclear complexs of the type [M2(L/L’)(NO3)n(H2O)2], [where M=UO22+, Th4+, ZrO2+] and [(VO)2(L/L’)(SO4)(H2O)], L= 4, 17-di(o-hydroxyphenyl)-5,6,9,12,15,16-hexaaza-7,8,13,14-tetraphenyl heptadec-4, 6, 8, 12, 14, 16-hexene or L’= 10:11-benzo-4, 17-di(o-hydroxyphenyl)-5,6,9,12,15,16-hexaaza-7,8,13,14-tetraphenyl heptadec-4, 6, 8, 12, 14, 16-hexene, n=2 for UO22+, ZrO2+ n=6 for Th4+, have been synthesized in template method from ethylenediamine/orthophenylene diamine, benzil monohydrazone and salicyldehyde and characterized on the basis of elemental analysis, thermal analysis, molar conductivity, magnetic moment, electronic, infrared, 1H-NMR studies. The results indicate that the VO(IV) ion is penta co-ordinated yielding paramagnetic complexes; UO2(VI), ZrO(IV) ions are hexa co-ordinated where as Th(IV) ion is octa co-ordinated yielding diamagnetic complexes of above composition.
Gas Chromatography-Mass Spectrometer Electron Ionization (GC-MS -EI)method for the Analysis of MalathionResidue in Tomato
Authors: Elbashir Dr. AbdallaA , Ahmed Hassan Elobid 
Published: May 2018

In this a study tomato sampleswere collected from Khartoum, extracted with acetone, dichloromethane and petroleum ether (1:1:1) and cleaned up by florisil column. Malathion quantitative determination is carried out by gas chromatograph-mass spectrometerusing the optimum ionization mode electron ionization (EI). The detection ofmalathionis confirmed by retention time and comparison of primary and secondary ions.Recovery studies were performed at two spikes (0.5,0.25mg kg-1) fortification levels of malathion and the recovery obtained ranged from 81% to 97%. The method showed good linearity(R²> 0.995) over the range assayed (from 0.05 to 7.0mg L-1) and the calculated limits of detection (LOD) and quantification(LOQ) were0.03 mg kg-1and 0.11 mg kg-1, respectively. These limits werelower than the maximum residue levels(MRL) established by European legislations (0.5mg kg-1).
Synthesis of 2, 3-Dihydro-1,4-naphthaquinone Derivatives for Targeting the Altered Cancer Cells Metabolism
Authors: Mohammed Mohammed Hassan , Mahdi Monther Faisal , Hamed Fadhil Mohsin 
Published: May 2018

A new four derivatives of 2,3-Dihydro-1,4-naphthaquinonewere synthesizedas possible bioreductiveprodrugs for5-fluorouracil (5-Fu),Mercaptopurine (6-MP), N-acetyl cysteine (NAC)and 3-bromopyrovic acid (3-BPA) to selectively deliver the drugs into the cancer cells and these are:2-((5-fluoro-1,2-dihydropyrimidin-4-yloxy)methyl)-3-hydroxy naphthalene-1,4dione(compound A),2-((9H-purin-6-ylthio)-3-hydroxyl naphthalene-1,4dione(compound B)acetmido-3-((3-methyl-1,4-dihydronaphthalen-2-yl)methylthio)propanoicacid (compound C)and hydroxy-1,4-dioxo-1,4-dihydronaphthalen-2-yl)methyl3-bromo-2-oxopropanoate ( compound D)Their chemical structures were characterized by H1 NMR, IR spectroscopy and elemental microanalysis.The in vitro antitumor activity tests againstHep-2 human larynx cancer cell lineindicated that compound A,B,C and D havesignificant anticancer activities when compared with 5-Fu.
Synthesis, Characterization and Biological Evaluation of some New Thieno[2,3-d]Pyrimidine Derivatives
Authors: El-mahdy Kamelia , El-Kazak Azza , Abdel-Megid Mohamed , Seada Magdy , Farouk Osama 
Published: May 2018

10-Oxo-4,6,7,8,9,10-hexahydroprazolo[1,5-a][1]benzothieno[2,3-d]pyrimidine-3-carbaldehyde (2) was prepared by Vilsmeier-Haack reaction of 3-amino-2-methyl-5,6,7,8-tetrahydro[1]benzothieno[2,3-d]pyrimidin-4(3H)-one (1). Reaction of carbaldehyde derivative 2 with malononitrile afforded arylidene malononitrile 3. Cyclization of the latter compound with thiourea yielded pyrimidinethione 4. Interaction of carbaldehyde derivative 2 in presence of thiourea with keto- compounds such as ethyl acetoacetate, or acetylacetone, or dimedone or ethyl cyanoacetate gave pyrimidine derivatives 5-8. Hydrazinolysis of carbaldehyde derivative 2 gave the hydrazone 9. Reaction of the latter with phenyl isothiocyanate afforded thiosemicarbazone 10, which underwent cyclization with oxalyl chloride to give thioxoimidazolidinedione 11. Condensation of compound 2 with thiosemicarbazide furnished thiosemicarbazone derivative 12. Reaction of compound 2 with aminopyrazolone in the presence of an acid and/or a base afforded pyrazolones 13 and 14. Treatment of carbaldehyde derivative 2 with cyanoacetohydrazide gave acrylohydrazide 15. Interaction of the latter with carbon disulfide yielded mercaptooxadiazole 16. Condensation of compound 2 with acetylpyridazinone 17 produced chalcone 18. Reaction of compound 18 with malononitrile in pyridine gave cyanopyran 19, while its reaction with malononitrile in presence of ammonium acetate in ethanol yielded cyanopyridine 20. Structures of the newly synthesized products have been deduced on the basis of elemental analysis and spectral data. The synthesized compounds were screened for their antimicrobial activity.
Synthesis, Crystal Structure and Characterization of Cu2 (PO4) (OH)
Authors: Ayadi R. , Boujelbene Mohamed , Mhiri T. 
Published: May 2018

This paper reports the hydrothermal synthesis and crystal structure refinement of cuivre phosphate hydroxide, Cu 2 (PO4) (OH), obtained at 453 K.Its structure consists of chains of edge-sharing, distorted [CuO4 (OH)2] octahedral extending parallel to [001]. These chains are cross linked by isolated PO4 tetrahedra through corner-sharing, forming channels in which dimmers of edge-sharing [CuO4 (OH)] trigonal bipyramids are located. The structure is stabilized by medium to weak O-H…O hydrogen bonds. In contrast to the previous refinement single crystal X-ray and analysis of data from vibrational spectroscopy, all non –H atoms were refined with anisotropic displacement parameters and the H atom was located.