About Journal

Kirkuk University Journal-Scientific Studies KUJSS is a scientific, open access, and refereed journal published since 2006 by the College of Science, Kirkuk University,  Kirkuk, Iraq. It publishes experimental and theoretical papers in the field of pure science and engineering, in English or Arabic. The manuscript shall be considered for publication only with the understanding that they are neither under concurrent consideration by any journal nor have been published elsewhere. We are using iThenticate software to check the originality of the submitted works for potential plagiarism. Manuscripts...
Read More ...

The Effect of Addition of (Al2O3) Nano Particles on Structural and Electrical Properties of Bi2Ba2Ca2Cu3O10" +δ" Superconductors at High Temperature

Fouad Kamal Tawfeeq Alsumaidaei; Hussein Ali Mohammed

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 4, Pages 1-18
DOI: 10.32894/kujss.2020.167506

To enhancement the superconductor structural characteristics, nanoparticles of the Al2O3 were added to the samples under study. The Samples of high temperature superconductors 1-X (Bi2Ba2Ca2Cu3O10+ ) + X(Al2O3) with X= (0-0.9) were prepared by solid state reaction method under hydraulic pressure 8 ton/cm2 and annealing temperature 800 . Electrical properties of the samples showed that Tc increases from 126 K to 139 K, and also oxygen content in samples increased with increasing X values from 0 to 0.5, while Tc decreased less than 77 K with increasing X at values more than 0.5. In Structural properties, the X-ray diffraction of the samples showed orthorhombic phase with a=4.286A , b=5.4184A , c=35.3528A  at X=0, while c-value is increased to 35.9848A  at X=0.5. AFM results shows that the average grain size of the best sample was 47.67 nm at X=0.5. SEM it showed that there are dark regions related to the heavier elements, such as Bi and Cu, and light regions related to lighter elements, such as Ba and Ca, depending on atomic weights

Computational Study of the Effect of Adsorbed Lithium on Solid State Hydrogen Storage Capacity of Pristine and Boron Doped Graphene

Isaa Zain Alabden Hassan; Sufian mohammed mohammed Alezzi

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 4, Pages 19-41
DOI: 10.32894/kujss.2021.167516

Hydrogen is considered one of the most promising source of clean and renewable energy as an alternative for environment polluting fossil fuel resources. The safe and reasonable volumetric density storage represent the main problem facing the hydrogen technology. Most of the research nowadays are focusing on development of new technologies for solid state storage of hydrogen. At the present study, The adsorption of hydrogen molecule (H2) has been studied on the supercell (3 x 3 x 1) of pure graphene and doped graphene  with boron atom and adsorbed with lithium atom by first principle calculations with DFT method. We choice local density approximation (LDA) To describe the exchange-correlation energy between the interacting electrons and the basis set (Double Numerical Plus polarization DNP), the regions of a Brillion zone are set to (2 x 2 x 1). The binding energy of hydrogen molecules adsorbed on the surface of graphene adsorbed by the lithium atom was between (0.2-0.4 eV) and with a storage ratio (6.74 wt.%), Which meets the gravitational capacity standard specified by the energy department, And the binding energy of hydrogen molecules adsorbed on the surface of graphene adsorbed by the lithium atom and doped with the boron atom was between (0.23-0.32 eV) and with a storage ratio (6.67 wt.%), Thus meeting the standard for the final mass capacity (6.5 wt.%) Specified by the Department of Energy.  We conclude that the doping of the boron atom into one of the six graphene rings in the large unit cell (3 × 3 × 1) played a major role in increasing the stability of the graphene surface and reduce the binding energy that contributes to reducing the temperature of the hydrogen desorption process.

Study Effect Treatment Thermal for Cermet Composite Prepared by Flame Thermal Spray Method.

S. H. Hameedi

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 4, Pages 42-55
DOI: 10.32894/kujss.2021.167517

Flame thermal spraying technology was used in the production of 25% zirconia composite material with 25% alumina particle with binder material of 50% Al-Ni alloy base on 316L alloy steel base, after preparation the base surface with a method of roughing the granular. Spraying was carried out using a spray distance (12,14,16,18,20) cm. Hardness tests were carried out on the composite material to study the effect of changing spray distance on the properties of the resulting layer. The thermal treatment was performed on the samples at (850,950,1050,1150)  for an hour. The results of the tests confirmed that the best spraying distance (16 cm) and the thermal treatment (1050 ) have a significant effect on improving the hardness of the layers of the composite material.

Synthesis and Characterization of Some Schiff Bases Derived from Carboxymethyl Chitosan and Evaluating The Biological Activity of Some of these Derivatives

Ahmed A. H. Al-kadhimi; Moneer Khadhim Muhsin; Marwan Ahmed Jassim Ahmed Jassim Shahir Al-Salami

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 4, Pages 56-86
DOI: 10.32894/kujss.2021.167518

This study included the synthesis of O-carboxymethyl chitosan which contains amine group attached directly to its glucose unit from the well-known natural polymer (chitosan), which in turn was reacted with some aromatic aldehydes containing o- and p- substituents to prepare a series of Schiff bases compounds. The used aldehydes were; p-boromobenzaldehyde, o-hydroxybenzaldehyde, o-bromobenzaldehyde, p-chlorobenzaldehyde, and p-nitrobenzaldehyde. The synthesized compounds were characterized using spectroscopic techniques including FT-IR and 1H-NMR. The thermal stability of some of the prepared compounds was checked using differential thermaogravimetric analysis DTA. Finally, the biological activity of two Schiff bases was measured against two types of bacteria (Escherichia coli) and (Staphylococcus aureus) in terms of inhibition rate.

Identify Months of Comfort and Discomfort Using the Temperature-Humidity Index at Selected Stations in Iraq

jawdet hedayet Mohammed

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 4, Pages 87-106
DOI: 10.32894/kujss.2021.167519

In this research, the months of comfort and discomfort were identified using the Temperature-Humidity Index in selected stations in Iraq (Mosul, Baghdad, Basra) using data of the temperature and relative humidity values of the period (1983-2019) obtained from the Iraqi Meteorological organization and Seismology. The results showed that the months of discomfort in the three study stations were (January, July, August, December), while the months of comfort in the three study stations were both (April, September), while the months (February, March, June, September, November) alternated between comfort and discomfort in the three study stations. This research also clarified the effect of both temperature and relative humidity on the values of the Temperature-Humidity Index by clarifying the nature of the relationship between them by calculating the coefficient of correlation using Microsoft Excel (2010), where the results showed a linear strong correlation between temperature and Temperature-Humidity Index values, where the values ​​of correlation coefficients ranged between (0.996) – (0.997), while the correlation was inversely strong between relative humidity and Temperature-Humidity Index values where the values ​​of correlation coefficients ranged between (-0.985) – (-0.959) in the study stations, this indicates that the increase in the value of temperature and decrease relative humidity leads to an increase in the values of the Temperature-Humidity Index, and vice versa.

Color Characterizations of Pure ZnO and ZnO/ SeO2 Thin Films Annealed at Different Temperature

Ali I. Salih

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 4, Pages 107-124
DOI: 10.32894/kujss.2021.167522

Pure Zinc oxide and ZnO/SeO2 oxide thin films were prepared successfully by sol gel method and annealed at different temperature under ambient condition. These films were characterized by means of XRD, AFM, and UV-visible. XRD patterns clearly showed the presence of crystalline ZnO/SeO2 particles, the ZnO/SeO2 film showed a good crystallinity like pure ZnO film, Optical transmittance spectra of films showed high transparency (>87%) in visible region. The color coordinate and tristimulus value of transmittance spectral showed that the best decolourization result was achieved at 7.5 at.% Se at 400oC, 600oC and 10 at.% Se at 500oC , for the best brightness result appeared at two point with 2.5 at.% Se at 600oC and 7.5 at.% Se at 400oC. AFM studies reveal that rms roughness of the thin films increased with the increasing of Se concentrations. Also, the surface roughness increased with the increasing of the annealed temperature.

Oocyte development in liza abu

Gazwa. D. Al-Nakeeb; Mukhtar. Kh. Haba

Kirkuk University Journal-Scientific Studies, 2010, Volume 5, Issue 2, Pages 53-41
DOI: 10.32894/kujss.2010.41425

Khishni fish Liza abu were collected from Tigris river to study oocyte development in this fish .Present study showed that the oogenesis process include seven stages divided according to cell size,chromatin matter and vitellogenesis .The first stage represent as Oogonia,the second is Early oocyte,the third is Multinucleated stage,then Yolk nucleus stage (indicator to beginning of vitillogenesis),followed by primary and secondary stages and lastly Maturation stage

Spectrophotometric Method for Estimation of Promethazine- HCl in Pharmaceutical Formulation Based on Oxidative Coupling with the Reagent m-Amino Benzoic Acid in Presence of N-Bromosuccinimide.

Mohammad Salim Abdulaziz; Aseen N. Shareef; Mohsin Hamza Bakir

Kirkuk University Journal-Scientific Studies, 2019, Volume 14, Issue 4, Pages 236-256
DOI: 10.32894/kujss.2019.14.4.14

An easy, rapid and sensitive novel spectrophotometric method for estimation of trace amounts of Promethazine-HCl in aqueous solution is described. The method is based on using the oxidative coupling reaction of Promethazine-HCl with m-amino benzoic acid reagent at pH1.2 in the presence of N-bromosuccinimide to produce an intense green color, water soluble, product which exhibit maximum absorbance at 592 nm. Beer's law is obeyed over concentration range of (2-26 µg/ml), with a Ԑ 9.754×〖10〗^3 l/mol.cm, Coefficient determination (R2=0.9991). Sandell̕s index of 0.03289 µg/cm^2, the average recovery is 100.396 %, RSD does not exceed 0.3096 %, LOD of 0.1949 µg/m1 and LOQ of 0.5905 µg/m1. The proposed method was applied successfully for determination of PMZH in its pharmaceutical formulations..

Study of Pollution in Heavy Metals and Some Physico-Chemical Variables of Wastes Water from Kirkuk City Hospitals

Theiab.G. Hussein; Kameran.Sh. Hussein; Abdullah.S. Kazael; Sarhan. A. salman

Kirkuk University Journal-Scientific Studies, 2018, Volume 13, Issue 2, Pages 230-252
DOI: 10.32894/kujss.2018.145825

The selection was made on a number of hospitals to conduct a study on the quality of the water. The samples were taken before and after treatment from three hospitals in the city of Kirkuk, Kirkuk General Hospital, Azadi Educational Hospital and Children's Hospital. The samples were collected at regular intervals Six months from September (2016) to February (2017) . The first phase, which included the measurement of some physical variables and chemical variables, included physical measurements, temperature measurement, electrical conductivity (EC), total dissolved solids (T.D.S), (T.S.S), all of which were above the permissible limit, except for the temperature. Chemical analyzes included (pH), (BOD) and (COD),(SO4-2), (PO4-3) and(NO3). The results of the study indicated that the applications were characterized by the rise of most chemical standards, most of which exceeded environmental determinants except (SO4-2) , and (pH), within the limits allowed for Iraqi specifications, and the second phase of the study, to demonstrate the extent of contamination of heavy elements, and included the measurement of the study of heavy elements: (Fe, Cd, Cr) The availability of cadmium and chromium, at concentrations higher than is permitted, while the concentration of iron elements was less than the limit allowed globally and locally, and the study used the research method And statistical analysis of data from wastewater models studied

Design of the illumination system in the field emission Scanning Electron Microscope (SEM)

Mohammed Abdullah Hussein; Faez Ahmed Mohammed

Kirkuk University Journal-Scientific Studies, 2017, Volume 12, Issue 4, Pages 287-296
DOI: 10.32894/kujss.2017.132396

The main goal of This Work is to survey the field emission scanning electron microscope (SEM) to obtain on the optimal design for illumination system. The SEM optical column contains of illumination system that form a focused beam by electrons are released and animated to incident on the specimen surface, this backscattered electrons from the specimen surfaces, finally forming an image. mainly the optical column include a field emission source as the beam source, illumination system, electron control unit, and unit the vacuum. use of a finite element analyses in the design process of the SEM ingredient to be optimally determined. By the analysis we can predict the beam emission characteristics and relevant trajectories were predicted from the analysis of the present work from which a systematic design of the electron optical system is enabled.

A New Technique to Compute Complex Roots

Sasan A. Muheadden

Kirkuk University Journal-Scientific Studies, 2010, Volume 5, Issue 1, Pages 104-113
DOI: 10.32894/kujss.2010.41098

In this paper we modified Newton – Raphson and Secant methods to Complex form, then from that we get new iterative formula to them, named Newton (Secant) real iteration formula and Newton (Secant) imaginary iteration formula, real iteration used to find real roots while imaginary iteration one will be used to find complex roots of non- linear equations such as ( ). To find real roots, we start with a real initial point in real iteration getting a sequence of real numbers, to find complex roots start with a complex initial point in complex formula getting a sequence of complex numbers, also we write a new algorithm for this technique and write the program by using Matlab application system version 7.8 for this new method such that it will determine the real roots when we enter the initial real point but when we enter the initial complex point it will determine the complex roots.

Construction of New Coated Carbon Electrodes for Determination of Sildenafil Citrate Drug

Aveen K. Mohammed; Ali I. Khaleel; Nawzad N. Ahmed

Kirkuk University Journal-Scientific Studies, 2020, Volume 15, Issue 2, Pages 1-16
DOI: 10.32894/kujss.2020.15.2.1

In this research, new coated carbon electrodes were constructed and used for the determination of Sildenafil citrate (SILC) drug. The electrodes were constructed by preparing ion-pair for (SILC) with phosphotungstic acid (PTA) or phosphomolybdic (PMA) acid using   dibutyl phthalate (DBP) as a plasticizer. These electrodes showed good sensitivity towards SILC with linear range of (1.0´10-7-1.0´10-2) M, correlation coefficient, (0.9990), the life time (120) days, optimum temperature range (23-65) oC and optimum pH range (2-5) for both electrodes, limit of detection (5.055´10-8 and 5.116´10-8) M, slope (57.29 and 59.10) mV/decadefor SILC-PTA and SILC-PMA electrodes respectively. These electrodes were successfully applied for determination of SILC in pure and pharmaceutical preparation form(tablets) with recovery of not less than 98%.

Effect of Spraying Urea in Yield and Components Properties in Upland Cotton Gossypium Hirsutum

Naif S. Saleh; Arshad Th. AL-Niaumi; Fathel R. AL-Kana

Kirkuk University Journal-Scientific Studies, 2011, Volume 6, Issue 1, Pages 32-43
DOI: 10.32894/kujss.2011.42538

An experiment was conducted in randomized complete block design with four replicates to study the effect of spraying nitrogen fertilizer as a urea with concentration 0 , 10 , 20 , 30 mg/liter on the characters of cotton Koker 310 at summer season 2007 in experiment station of cotton research unit in mosul technical institute , all the agricultural practices were done for the end of season where study the plant height , number of nodes to the first fruit branch , number of vegetative branches , number of fruiting branches , number of bolls /plant , boll weight , seed index , lint index , lint percentage and seed cotton yield kg/h . Spraying urea fertilizer in concentration 20 mg/liter significantly exceeded from control in plant height , number of fruiting branches , number of bolls/plant , boll weight and seed cotton yield kg/h in percent 63.72 , 24.49 , 43.92 , 8.92 , 42.59% respectively while seed index significantly differed from control treatment in other used concentrations . Spraying urea fertilizer reflected significantly linear regression correlation to increase seed index and degrease lint percentage in addition to positive significant correlation for seed cotton yield with plant height , number of vegetative branches , number of fruiting branches , number of bolls /plant , boll weight and seed index .

Inhibitory Effect of Aqueous Extract of Pomegranate Peel on Escherichia

Sohaib Sabah Al-Salihi

Kirkuk University Journal-Scientific Studies, 2014, Volume 9, Issue 1, Pages 11-18
DOI: 10.32894/kujss.2014.89138

This study was aimed to investigate the inhibitory activities of the aqueous extract of pomegranate peel on a pathogenic isolates of E.coli had multi-resistance characteristic against antibiotics. Twenty pathological isolates of E.coli were taken from the laboratory of the Kirkuk Children’s Hospital and confirmation of these isolates was done by using diagnostic methods. The results of the antibiotics sensitivity test showed that all isolates were resistant to AMC , CRO and PY 100% , while no one of them showing any resistance to CN, IPM and these isolates possessed multiple resistance patterns to the antibiotics from three to six antibiotics and the pattern of the resistanc ( AMC , CRO , PY) was more common among the isolates on other hand, the results indicated that all isolates sensitized 100% to the concentration 100 mg / ml and 50 mg / ml of the aqueous extract and 25% were sensitized to the concentration of 25 mg / ml, while did not show any inhibitory in the concentration of 12.5%.

Study the Effect of The Annealing and Doping on the Some Optical Properties of (ZnS) Thin Films

Suzan Abdullah hasan; Abdul Majeed Iyada Ibraheem; r Naji Majeed

Kirkuk University Journal-Scientific Studies, 2013, Volume 8, Issue 1, Pages 44-53
DOI: 10.32894/kujss.2013.77602

In this research we study the effect of Annealing and doping by 10% Cupper on some optical properties of (ZnS) thin films (energy gap, absorption coefficient , extinction coefficient) as a function of photon energy .The optical properties were studied through Visible and Ultra-volit wavelength range (300-900nm) using UV-visible spectrometer, these properties were studied before and after annealing and doping . It is found that the energy gap was (3.6eV) before annealing and doping but after annealing and doping it is found (3.7eV, 3.4eV) respectively. Absorption and extinction coefficient increased after annealing and decreased after doping .

Determination of the Content of the Rare Earth Elements (REE) in Akashat Phosphate rocks (Paliocene) in

Kotayba T. Al-Youzbakey; Salim M. Al-Dabbagh

Kirkuk University Journal-Scientific Studies, 2009, Volume 4, Issue 2, Pages 27-38
DOI: 10.32894/kujss.2009.36243

The X-ray fluorescence technique meets the requirements of qualitative and quantitative analysis of widely variable major, minor and trace elements including rare earth elements (REE) in geological samples. Although the REE are generally enriched in phosphate rock, yet there are only few elements e.g. La, Ce and Nd can be directly analyzed by XRF method. The analysis of the other REE required additional chemical treatment of the samples (known and unknown) to insure similarity in matrix material, and to obtained lowest spectrum overlap with analytical line of the REE. In addition, the chemical treatment is intended to increase the REE concentration to a level that makes L-lines intensity measurement by XRF is possible. The whole subject represents the core of the present study.
The chemical treatment includes three main stages: (1) digestion of the sample using nitric, hydrochloric, hydrofluoric and perchloric acids. (2) Oxalate precipitation to separate elements with oxidation state of +2 or more (including REE) according to the solubility of their oxalate precipitate. After proper filtration, the precipitate on the filter paper is transferred and dissolved in diluted nitric acid. (3) Precipitation of the separated element as hydroxide on aluminum hydroxide carrier. The hydroxide precipitate were pressed into pellet which is subjected to intensity measurement of the L line of the REE. The study display the results of evaluation of the present analytical method which indicate to (in average) analytical accuracy and precision better than 10% and 3% respectively.
Key words: phosphorites, phosphatic ore, REE, Akashat Fm., XRF.

Keyword Cloud