bluuebunny/crossref_metadata_2025_split huggingface dataset:
A 100% Water Mobile Phase HPLC-PDA Analysis of Selected Neonicotinoid Insecticides
Authors: Furusawa Naoto 
Published: May 2018

This paper describes a reserved-phase HPLC method for detecting frequently-used neonicotinoid insecticides, acetamiprid (ATP) and imidacloprid (ICP), using an isocratic 100 % water mobile phase. Chromatographic separations were performed an Inertsil® WP300 C4 with water mobile phase and a photodiode-array detector. The total run time was < 7 min. The system suitability was well within the international acceptance criteria. The detection limits were 0.013 μg ml-1 for ATP and 0.015 μg ml-1 for ICP, respectively. A harmless HPLC method for simultaneous detecting ATP and ICP was developed and may be further applied to the quantification in foods.
Synthesis and thermodynamics of the reactions of [Pd(Eten)(H2O)2]2+ with ligands of biological significane with reference to the antitumour activity
Authors: Al-Kallaf Fawzia , Khalf-Allaa Perihan A. , Al-Bassam Abeer , Shoukry Mohamed M. 
Published: May 2018

Pd(Eten)Cl2 complex, where Eten = N-ethylethylenediamine , was synthesized and characterized by elemental analysis and spectroscopic techniques. The stoichiometry and stability of the complexes formed between [Pd(Eten)(H2O)2]2+ and various biologically relevant ligands as adenine, adenosine, adenosine-5’-monophosphate and some selected peptides were investigated at 25ºC and 0.1 M ionic strength. The speciation diagrams of the complexes formed in solutions are evaluated. Thermodynamic parameters for Pd(Eten)-glycylglycine complexes were estimated.
Exploring Quantitative Structure-Activity Relationships (QSARs) of Non-Tri cyclic Cyclooxygenase-2 (COX-2) Inhibitors by MLR and PC-ANN
Authors: Deeb Omar , Zatari N. 
Published: May 2018

Quantitative structure–activity relationship study using principal component artificial neural network (PC-ANN) methodology was conducted to predict the inhibitory activities expressed as pIC50 of 73 non-tri cyclic cyclooxygenase-2 (COX-2) inhibitors. The results obtained by MLR shows that the best two models are close to each other with regression coefficient of 0.85. These optimal models were further analyzed by PC-ANN and the best model obtained was with regression coefficient of 0.823 for the test set. The lowest prediction sum of squares (PRESS) value obtained for the prediction set is 4.727 which accounts for predictability of the model. Artificial neural networks provide improved models for heterogeneous data sets without splitting them into families. Both the external and cross-validation methods are used to validate the performances of the resulting models. Randomization test is employed to check the suitability of the models.
Synthesis, characterization, antibacterial, antioxidant and anti-inflammatory activities of new 4-Aryl-2-amino-6-(4-hydroxy coumarin-3-yl) pyridine-3-carbonitriles derivatives
Authors: HAMDI Naceur 
Published: May 2018

This study aimed for the synthesis of 4-Aryl-2-amino-6-(4-hydroxy coumarin-3-yl) pyridine-3-carbonitriles 4 suitable for use as antibacterial, anti-oxidant and anti-inflammatory activities via a versatile, readily accessible 3-((2E)-3(aryl)prop-2-enoyl)-2H-chromen-2-one 3 which were prepared by refluxing 3-acetyl-4-hydroxy coumarin with aromatic aldehydes in chloroform in the presence of a catalytic amount of piperidine. Then the direct reaction of the obtained chalcones 3 with malonitrile in the presence of ammonium acetate in one step gave products 5 .The structures of the new compounds 3-4 were confirmed by elemental analysis, IR, and multinuclear/multidimensional NMR spectroscopy (1H, 13C-NMR, NOESY, HMBC) which allowed assignment of the complete network of proton and carbon atoms. Most of the new compounds 4 exhibit moderate antibacterial activity against Gram Negative bacterial strains (E. coli, K. pneumonia, S. typhi and S. flexneri). In addition, the compounds 4 were investigated for anti-oxidant activities by super oxide radical, DPPH (2,2-Diphenyl-1-picrylhydrazyl), and hydroxyl radical scavenging assays, where most of the compounds displayed significant antioxidant activities. Furthermore, these 4-Aryl-2-amino-6-(4-hydroxy coumarin-3-yl) pyridine-3-carbonitriles 4 were evaluated for anti-inflammatory activity by indirect haemolytic and lipoxygenase inhibition assays where compounds revealed good activity.
Synthesis, crystal structure, NMR characterization, Thermal analysis and Spectroscopic Characteristics of [2,3-(CH3)2C6H3NH3]6P6O18.2H2O
Authors: FEZAI RAMZI , KHEDHIRI LAMIA , RZAIGUI MOHAMED 
Published: May 2018

Single crystals of [2,3-(CH3)2C6H3NH3]6P6O18.2H2O were synthesized in aqueous solution. This compound crystalizes in the P 141"> Triclinic unit cell with the parameters a = 9.97 Å, b = 16.06 Å, c =18.62 Å, α = 93.03°, b = 89.75 °, g = 93.85°, and Z = 2. Its crystal structure, determined by X-ray diffraction, consists of inorganic layers parallel to the ac plane. The organic molecules are disposed parallel to the plane bc on either side of each inorganic layer on which are anchored by hydrogen bonds via their ammonium groups (N-H…O). Configuration of the asymmetric unit is characterized by FT-IR spectroscopy and solid state NMR study of 31P.
Sol-Gel Synthesis, Magnetic and Optical Properties of Co2+:Nd3+::2:1 molar ratio doped in SiO2
Authors: Das Bidhu Bhusan , Rao Ruppa Govinda 
Published: May 2018

Synthesis of Co2+:Nd3+::2:1 molar ratio doped SiO2 with Co2+ ions concentrations viz. 0.0004, 0.001, 0.002, 0.003, 0.004 moles in S1-S5, respectively are performed by sol-gel method. Observed values of the densities and the concentrations of the Co2+ ions in S1-S5 are found to be 2.26, 2.29, 2.37, 3.44, 2.49 g/cm3, and ~ 1020 ions/g, respectively. Powder XRD results show the formation of amorphous SiO2 phase in the samples. DTA-TGA/DTG traces in the range 27-700 ˚C show no characteristic event in the samples. The IR peak in the range 412-418 cm-1 is ascribed to the asymmetric mode of the octahedral [NdO6/2]3- units. The peak around 440 cm-1 in S1-S5 is due to the ν2-symmetric bending mode of the tetrahedral [SiO4/2]4- units. The weak IR peak ~ 670 cm-1 is due to the ν1-mode of the tetrahedral [CoO4/2]4- units. The calculated values of the magnetic susceptibility from the observed magnetic moments data at 300 K are found to be ~10-6 emu/gG in S1-S5 which show the weak paramagnetic nature of the materials. The EMR lineshapes recorded at 6, 50, 77, and 300 K are very broad, isotropic and smeared out with only two detectable characteristic peaks. The giso-value ~ 2.3 is due to the doped Co2+(3d7) ions in tetrahedral coordinations, while the giso-value ~ 2.01 is due to the doped Nd3+(4f3) ions in distorted octahedral coordinations. The lineshapes only at 6 K are distinct, while at higher temperatures these peaks are severely smeared out. The optical absorption broad band at ~750 nm (13262 cm-1) is assigned to 4I9/2 ® 4F7/2 + 4S3/2 transitions in optically active Nd3+(4f3) ions, and the peak ~ 520 nm (19230 cm-1) is attributed to 4A2g ® 4T1g(P) transitions in Co2+ (S=3/2, 3d7) ions in tetrahedral coordinations.
Phytochemical and Spectral Studies of Synthesis sulfur Nanoparticles using Sophora japonica Pods Extract
Authors: Awwad Akl M. , Salem Nidá M. , Abdeen Amany O. 
Published: May 2018

This study aims to investigate the aqueous extract of Sophora japonica pods for the presence of various phytochemicals and to synthesize sulfur nanoparticles. The presence of various phytochemicals viz. polyphenols, alkaloids, terpenoids, flavonoids, and tannins were investigated by standard biochemical methods. A rapid, green and novel approach for synthesis sulfur nanoparticles (SNPs) from sodium thiosulfate in the presence of Sophora japonica pods aqueous extract in one-pot reaction at ambient temperature. The resulting sulfur nanoparticles were characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that sulfur nanoparticles were successfully synthesized in sphere shape, and with an average particle size 5-100 nm. The effect of plant pods extract concentration on particle size of sulfur nanoparticles shows that can significantly reduce the particle size without changing the shape. The results revealed that the aqueous extract of Sophora japonica pods act as capping, dispersing and stabilizing agent for sulfur nanoparticles. This method is a novel approach for production nanosized sulfur particles, which could be applied to prepare sulfur nanoparticles for application in antimicrobial activity, fertilizers, and plant protection.
Removal of Carcinogenic Hexavalent Chromium by Reduction with Iron in Presence of Accelerator Non Toxic Organic Compounds (Chalcone)
Authors: Rahman Hanaa H. Abdel , Moustafa Amira H.E. , Mostafa Mohamed A. Z. , Wahed ElsaiedM. Abdel 
Published: May 2018

The focus of this work is on Cr, which has two predominant oxidation states of the atmosphere: + ‏3, which is an essential nutrient in low doses, and +‏6, which is highly toxic and carcinogenic. We found that, the reduction of Cr6+ to Cr3+ was first order reaction and the rate controlling step is the diffusion of (Cr6+) from bulk to iron surface. Toxicity reduction method includes studding of 1-aryl-3-(1-phenylpyrazolo [3,4-b] quinoxalin-3-yl) -2-propenones derivatives or chalcone derivatives concentration, temperatures and rotation speeds effect, which exhibit a strong dependence and supported that the process is diffusion controlled. Thermodynamic parameter ΔG*, ΔH* and ΔS* are given. Mass transfer study of the process was correlated by the equation: Sh = 0.53Sc0.33Re0.38. The order of acceleration was confirmed by quantum calculations.
INVESTIGATION OF LIQUID-PHASE OXIDATION OF NAPHTHENE-PARAFFINIC HYDROCARBONS OF BALAKHANY OIL
Authors: Abbasov V.M. , Afandiyeva L.M. , Aliyeva L.I. , Nuriyev L.H. , Salmanova Ch.Q. , Ahmadbayova S. F. , Seyidahmadova F.N. 
Published: May 2018

Liquid-phase aerobic oxidation of naphthene-paraffinic hydrocarbons at 217-330о С of diesel fraction of Balakhany oils in the presence of the mixtures of Mn, Cr salts of natural petroleum acids (MeNPA) has been investigated. The catalytic oxidation process is realized for 7 hours at temperature 135-1400C in a barbotage reactor. Samples were taken every hour and oxidized product was separated by composition in accordance with known methods. Mechanism of oxidation process of naphthene-paraffinic hydrocarbons has been studied by IR- spectroscopy. It has been found that, after 5 hours oxidation of naphthene-paraffinic hydrocarbons the yield of obtaining synthetic petroleum acids rich 16,5%, the yield of oxysynthetic petroleum acids-18%. The changes of the optical density of a carbonyl and a hydroxyl groups depending on the time were studied. It was found that the oxidation reaction should be conducted within 6 hours, as D1713(C=O) and D941(OH) after 6 hours decrease and it’s probably connected with beginning decomposition process of the acids and oxyacids.
Photocatalytic Degradation of Alizarin Red-S by Fe-Co Nanoparticles Prepared By Chemical Co-precipitation Method
Authors: Nandre Chandrakant Vedu , Sawant C.P. 
Published: May 2018

In the present study photocatalytic degradation of hazardous water soluble alizarin red dye by using Fe-Co nanoparticles has been investigated. Fe-Co nanoparticles was synthesized by chemical co-precipitation method and characterized by TEM, SEM, EDAX and XRD. The photocatalytic degradation have been studied with the help of variety of parameters such as catalytic dose, dye concentration, pH, contact time and most important chemical oxygen demand. It was observed that The photocatalytic degradation of alizarin red dye by using Fe-Co nanoparticles was an effective ,economic, ecofriendly and faster mode of removing dye from an aqueous solution. The optimum condition for the degradation of the dye was 50 mg/L,pH 8.0, catalyst dose 60 mg/L and contact time 60 minutes. The kinetic studies also have been studied.
EFFECT OF FUSARIUM NYGAMAI INFECTION ON THE CHEMICAL COMPOSITION OF FLOUR FROM TWO YAM VARIETIES
Authors: Majekodunmi Omodamiro Rachel , P.C Ojimelukwe , R Asiedu , H.A Etudaiye 
Published: May 2018

Yams (Dioscorea spp) are among the oldest food crops. It is estimated that after six months of storage up to 56% of the crop is lost to rot. In Nigeria, fresh yam tubers are used for production of Elubo (yam flour) for preparation of amala, as it is called among the Yoruba in Western Nigeria, and akwunaji in the east of the River Niger. Many researchershave emphasized the importance of microbial rotting in causing storage losses. This study evaluated the effect of yam rot on the nutritional values of Fusarium infected yam tubers.Tubers from two yam (Dioscorea rotundata Poir.)varieties-Nwopoko and TDr95/19177-were infected with Fusarium nygamai pure culture and stored for 12 weeks, after which the tubers were used to produce yam flour and were analyzed for their nutrient composition comprising: dry matter/ moisture content, ash, total sugar, starch, amylose, vitamin C, protein and tannins. Wholesome yams of the same varieties were also used to produce yam flour and equally evaluated for the same nutrients. Infection with Fusariumnygamai led to a significant reduction (p<0.05) in the nutrient composition of the infected yam flour compared with those ofwholesome samples. Vitamin C content reduced from 41.10 to 27.26 (mg/100g) in variety Nwopoko and 36.30 to 30.53 (mg/100g); in variety TDr95/19177. Corresponding values for protein content was from 5.05 to 4.60% and 4.93 to 4.62%; Ash Content from 1.32 to 1.30% and 1.36 to 1.24%; Total Sugar Content from 5.34 to 5.20% and 5.21 to 5.02%; Starch 78.71 to 77.61 and 89.28 to 81.53%; Amylose from 29.95 to 28.87% and 30.01 to 27.95%. However, an increase in the tannin content – (1.84 and 1.94 mg/g) as against (0.31 and 0.26 mg/g) in Nwopoko and TDr 95/19177 varieties respectively was observed. The increase in the tannin content implies an increase in the antinutrient composition. The tendency to produce Elubo used for preparation of amala with rotten yam (possibly Fusarium infected) should be discouraged.
Modelling and Analysis of Real Time Power System With Cascaded Multilevel STATCOM Using Fuzzy Controller
Authors: K SUNDARARAJU , R SENTHIL KUMAR 
Published: May 2018

Electric Power is a major concern that has generated more importance in electrical utilities and consumers. To assure a reliable and quality power system, all the bus are expected to maintain steady acceptable voltage before and after being subjected to any disturbance. Among the FACTs devices a static synchronous compensator(STATCOM) is analyzed to provide a reliable and feasible solution. The STATCOM has been developed using cascaded multilevel converter. A FUZZY based controller for Cascaded Multilevel STATCOM is developed which produces improved performance.This paper presents a comprehensive analysis of CMC based STATCOM with fuzzy controller in real time power system concerning the problem of variable loading and losses. A real time substation with 20 bus are analyzed with power flow analysis with and without STATCOM. Without the connection of STATCOM, a observable changes in the system voltage, line flows and losses are in system behaviour. But this influences the quality of grid and hence the customers are affected badly, indicating the need of power flow analysis and location of STATCOM on the system to improve the voltage profile. It is demonstrated that the described model works to an excellent level in improving the substation performance.
Synthesis, Characterization and Evaluation of Anti-inflammatory Activity of Novel Indoline Derivatives
Authors: Manoharan Dhinesh kumar 
Published: May 2018

Series of indoline derivatives were synthesized using N-(4-aminophenyl) indoline-1-carbothiamide as a precursor. The structures of synthesized compounds were confirmed by FT-IR, 1H-NMR, 13C-NMR and LC-MS. The in vitro anti-inflammatory activity of synthesized indoline derivatives were examined by standard anti-denaturation assay. The compounds 4a (IC50 = 62.2 µg/ml) and 4b (IC50 = 60.7 µg/ml) showed potent inhibition on protein denaturation. The compounds 5a (IC50 = 97.8 µg/ml) exhibits moderate inhibition on protein denaturation
Effect of N-(6-aminobenzo[d]thiazol-2-yl)benzamide and 2,6-diamino-benzothiazole as Corrosion Inhibitor in acid medium
Authors: S Rekha. , K Kannan. , S Gnanavel. 
Published: May 2018

2-amino-6-nitrobenzothiazole(ANBT) was used as an inhibitor for the corrosion of mild steel in acid medium since the inhibition efficiency was low for that compound, 2,6-diaminobenzothiazole (DABT) and N-(6-aminobenzo [d] thiazol-2-y1) benzamide(ABTB) was synthesized, and characterized by FT-IR, H1NMR, and C13NMR.The synthesized compound was tested as a corrosion inhibitor for mild steel in 1N HCl solution using weight loss, Potentiodynamic polarization, and AC impedance techniques. The inhibition efficiency was studied at the different time, temperature and acid concentration by weight loss method. The values of activation energy and free energy of adsorption of these compounds were also calculated, which reveals that the inhibitor was adsorbed on the mild steel by physisorption mechanism. Adsorption obeys Langmuir and Temkin adsorption isotherms. The results obtained by weight loss method revealed that the compound performed as a better inhibitor for mild steel in 1N HCl. Potentiodynamic polarization studies showed that the inhibitor acts as a mixed type inhibitor.AC impedance studies revealed that the corrosion process was controlled by charge transfer process. Surface analysis was studied using SEM and FT-IR.
Synthesis, Characterization and evaluation of new
Authors: Hussain Mahmoud 
Published: May 2018

ABSTRACT A new polymer surfactant derived from cis-1,4-cyclohexane bis(methylamine) and ethylenediamintetraacetic acid [2,2'-(1,12-bis(4-(aminomethyl)cyclohexyl)-3,10-dioxo-2,5,8,11-tetraazadodecane-5,8-diyl) diacetic acid ] was synthesized and characterized by FTIR and 1HNMR. A series of electrochemical measurements, including corrosion potential and corrosion current has been made on the surfactant for carbon steel samples in corrosive environment. Results showed that the surfactant can offer some degrees of protection in the corrosive environments. The corrosion study of this polymer outline that it have a good resistant to the corrosion of carbon steel in 0.1 M solution of HCl, which can be indicate to uses as anti-corrosion materials
Synthesis, Spectroscopic and Thermogravimetric studies on some Transition metal complexes with hydrazone ligands.
Authors: Sadek Hassan Ahmed 
Published: May 2018

Complexes of Cu (II) and Ni (II) derived from 2-amino-N’-(2-hydroxybenzylidene) benzohydrazide (ASH) , 2-amino-N’-benzylidenebenzohydrazide (ABH), N’-(3-phenylallylidene)-2-((3-phenylallylidene)amino)benzohydrazide (ACH), and N’-(4-methoxybenzylidene)-2-((4-methoxybenzylidene)amino)benzohydrazide (AAH) have been synthesized and characterized by elemental and thermal analysis(TGA), IR, U.V-Visible, 1 H NMR (Ligands) spectral studies, magnetic susceptibility, atomic absorption and molar conductivity measurements, the ligand (ASH) act as tridentate with ONO donor sites, the bonding sites are carbonyl oxygen , azomethine nitrogen and phenolate oxygen, the other ligands act as bidentate with ON donor sites, the bonding sites are carbonyl oxygen, azomethine nitrogen, the metal complexes exhibit different geometrical structures such as square pyramidal, tetrahedral, square planar and octahedral. The Coats-Redfern equation has been used to calculate the thermodynamic parameters for different thermal decomposition steps of some complexes.
Experimental and Theoretical Investigations of Complex Formation of Substituted Phenylazo-Derivatives of Methylphloroglucinol
Authors: Kovalchukova Olga , A.T. Amangdam , S.B. Strashnova , P.V. Strashnov , E.P. Romashkina , O.V. Volyansky 
Published: May 2018

Using spectrophotometric titration technique, the processes of complex formation of some phenylazo-derivatives of methylphloroglucinol (MPG) containing hydroxo-, nitro- and nitroso-substituents were studied. The spectral criteria of neutral and ionized forms of the organic ligands in their different tautomeric forms were determined.It was detected that the complex formation is accompanied by formation of one or two chelate cycles which involve azo- or nitroso-fragments and neighboring OH-groups of the organic ligands. Different types of coordination lead to different changes in the electronic absorption spectra.The DFT-B3LYP modeling of a Ni(II) complex of α-hydroxyphenylazo MPG established the most probable coordination mode of the organic ligand: tridentate chelating dianion, distorted square coordination of Ni-cations including one water molecule. The theoretical results are in a good accordance with the experimental data.
Determination of the Candidiasis Marker in the Urine of Autistic Children
Authors: Czaplińska Joanna Kałużna , Grys Wioletta , Rozetti-Szymańska Anna , Rynkowski Jacek 
Published: May 2018

Introduction: Determination of the D/L-arabinitol ratio in urine appears to be a useful diagnostic test to indicate overgrowth of Candida yeast. The aim of this study was to find out whether levels of D/L-arabinitol ratio in the urine of children with autism are heightened.Material and methods: D/L-arabinitol ratio in urine was determined by capillary gas chromatography with electron capture detection (GC-ECD). Urine samples were collected from 83 autistic children (2.5–16 years old) and from 50 healthy children (1.5-16 years old).Results: (16.87%) of autistic children under study had an elevated D/L ratio in urine (>4.25). For 8 of them, the stated norm was exceeded less than twice (D/L: 4.39-6.98); for 4 of them the levels of D/L-arabinitol were higher than cutoff limit 2-3 times (D/L: 8.57-11.6); for 1 child the norm was exceeded over 5-times (D/L: 21.76); 1 child had a highly rebounding value (D/L: 89.13). Conclusion: Some of the autistic children show a raised D/L- arabinitol ratio in urine. Such percentage, in comparison to that reported in literature for other hospitalized patients, is lower than in the case of hematological, cardiac diseases and cancer, but higher than in the case of children from intensive care unit and persons after long term antibiotic therapies.
COMPARATIVE AND PERFORMANCE ANALYSIS OF INDUCTION MOTOR WITH ANN CONTROLLER
Authors: S Durairaj , Robinson Y. , Muthuramalingam M. 
Published: May 2018

A novel design of an adaptive artificial neural network technique (ANN) for controlling of the essential parameters, like as speed, torque, flux, voltage, current, and power etc of the induction motor is presented in this paper. Induction motors are characterized by way of incredibly non-linear, complicated and time-various dynamics and inaccessibility of its states and outputs for measurements. Thus it can be considered as a challenging engineering difficulty in the industrial sector. A few of them, such as PI, fuzzy strategies, Fuzzy logic based controllers are regarded as capability candidates for such application for operating induction motor. Hence of which, the outcome of the controller is also random and high-rated results are probably not obtained. Resolution of the proper rule base application upon the drawback can be achieved by the use of an ANN controller, which becomes a built-in system of method for the manipulate purposes and yields results, which is the focus of this paper. Within the designed ANN scheme, neural community tactics are used to prefer an appropriate rule base, which is utilizing the back propagation algorithm. The simulation outcome provided on this paper is exhibit the effectiveness of the developed approach, which has acquired faster response time or settling times. Additionally, the procedure developed has got a huge number of benefits within the industrial sector will also be converted into a real time application making use of some interfacing cards.