In this paper, we will generalized some results related to centralizer concept on
prime and semiprime Γ-rings of characteristic different from 2 .These results
relating to some results concerning left centralizer on Γ-rings.

     In this work proton exchange membranes were prepared by a modified microwave casting solution technique, using the polymers blend (polyethersulfone (PES), polystyrene (PS), polyvinylidenefluride (PVDF)). Modified casting method was used to overcome the poor compatibility between hydrophilic, (PES, PS) and hydrophobic PVDF, by cooling the substrate during the film casting process to (4.5-5.5^oC). Membranes were chemically modified by three reaction types to study the differences between their effects on the required properties for microbial fuel cell application. These methods use blend organic sulfonic acid precasting process and sulfonation by sulfuric acid post-casting process (APS), blending organic

   For a finite group G, the intersection graph   of G is the graph whose vertex set is the set of all proper non-trivial subgroups of G, where two distinct vertices are adjacent if their intersection is a non-trivial subgroup of G. In this article, we investigate the detour index, eccentric connectivity, and total eccentricity polynomials of the intersection graph  of subgroups of the dihedral group  for distinct primes . We also find the mean distance of the graph  .

The production of Pyrethrins as an insecticide from Chrysanthemum
cinerariaefolium flowers was studied. The crude active compound was extracted
using organic solvents. Detection by HPLC proved that the extract contained
Pyrethrin I and Pyrethrin II compared to the standard compounds. The flowers
extract showed active biological effect against beetle flour Tribolium castanum
reached 100% at the concentration 40% while the mortality percent reached 60, 77%
when the concentration decreased to 20 or 30% respectively.

Eight food materials were used. They affected differently the biology of this
beetle. Females laid highest number of eggs when fed on raw wool (٤٥ eggs), then
on goats hair (٤٠.٤ eggs) lowest number of eggs (١٧.٢) when fed on natural silk, and
(١٨ eggs) on sheep hide.
Larval duration was shortest on raw wool (٧٨.٤ days), then goats hair (٨٤.٨ days)
and camels hair (٩١.٨ days). It was largest on human hair (١٧٦ days) and natural silk
(١٧٣ days). Larval mortality was lowest on goat’s hair (١%) then on raw wool (٤%)
and highest on natural silk (١٦%) and human hair (١٢%). Other material lies between them. These materials affected variably pupal duration, adult emergence.

In this paper, we establish the conditions of the occurrence of the local bifurcations, such as saddle node, transcritical and pitchfork, of all equilibrium points of an eco-epidemiological model consisting of a prey-predator model with SI (susceptible-infected) epidemic diseases in prey population only and a refuge-stage structure in the predators. It is observed that there is a transcritical bifurcation near the axial and free predator equilibrium points, near disease-free equilibrium point is a saddle-node bifurcation and near positive (coexistence) equilibrium point is a saddle-node bifurcation, a transcritical bifurcation and a pitchfork bifurcation. Further investigations for Hopf bifurcation near coexistence equilibrium point are

In this paper, the asymptotic behavior of all solutions of impulsive neutral differential equations with positive and negative coefficients and with impulsive integral term was investigated. Some sufficient conditions were obtained to ensure that all nonoscillatory solutions converge to zero. Illustrative examples were given for the main results.

 Extracellular alkaline protease production by Aspergillus niger was studied with
the presence of different carbon and nitrogen sources availability in batch culture
condition .A. niger showed better protease production in the presence of organic
nitrogen sources compare to inorganic nitrogen sources in the medium, which
consist of 1% glucose as carbon source, 1.5% casein hydrolysate as nitrogen source
and 1% Nacl at initial pH=10 on rotary shaker incubator 140 rpm at 40 ºC for 5
days.

The present work includes the synthesis of different Schiff bases by the reaction of aniline with benzaldehyde and its derivatives. These Schiff bases reacted with phenoxy acid chloride to yield acetanilide derivatives. The synthesis of barbituric acid derivatives has been performed by the reaction of phenoxyacetanilide derivatives with guanidine carbonate and diethyl malonate (DEM) derivatives. Elemental analysis and FT-IR spectroscopy were used to characterize the prepared compounds.
The antibacterial activity of the products were studied in vitro using disc diffusion method against two pathogenic strains of bacteria (Pseudomonas aeuroginosa and Staphylococcus aureus) and showed high activity against both types.

The 2001 outburst of WZ Sagittae has shown the most compelling evidence yet for an enhancement of the mass transfer rate from the donor star during a dwarf nova outburst in the form of hot-spot brightening. It has been shown that even in this extreme case, the brightening can be attributed to tidal heating near the interaction point of an accretion stream with the expanding edge of an eccentric accretion disc, with no need at all for an increase in the mass transfer rate. Furthermore, it has been confirmed previous suggestions that an increase in mass transfer rate through the stream damps any eccentricity in an accretion disc and suppresses the appearance of super-humps, in contradiction to observations. Tidal heating is expected to be

Millisecond pulsars (MSPs) type have properties differs from normal pulsars type. In this research the characteristic age are concentrated depends on the periods (P), and period derivative (P`) for a sample stars which adopted. Also the value of characteristic age for these stars is determined by depending on the (Ostriker and Gunn) model. The relation between luminosity and the characteristic age for a sample of MSPs stars are illustrated depending on pulse periods for these stars. The results indicate that the spin down torque must decay with the characteristic age for a sample stars which adopted. Also the results for these stars at distance 1.5 kpc from the galactic disk illustrated that the decay must due to the main energy loss mec

The study included selection six species of the fungi related to Pleurotus genus were evaluated for their ability to production of Pleurotin, one of them, Pleurotus ostreatus (P.11) was isolated and identified in the present study. Pleurotin was extracted with screening by Thin Layer Chromatography (TLC) and quantification High Performance Liquid Chromatography (HPLC). Cytotoxicity of Pleurotin extracted from P. ostreatus (P.11) grown in different sugar sources (galactose, mannitol, sucrose, dextrose and lactose) liquid media was test against three selected cancer cell lines, CaSki, MCF-7 and A549 addition to Human Non Cancer Fibroblast Cell Line (MRC-5). Pleurotin of P. ostreatus (P.11) grown in galactose induced the significant highest

The stress – strength model is one of the models that are used to compute reliability. In this paper, we derived mathematical formulas for the reliability of the stress – strength model that follows Rayleigh Pareto (Rayl. – Par) distribution. Here, the model has a single component, where strength Y is subjected to a stress X, represented by moment, reliability function, restricted behavior, and ordering statistics. Some estimation methods were used, which are the maximum likelihood, ordinary least squares, and two shrinkage methods, in addition to a newly suggested method for weighting the contraction. The performance of these estimates was studied empirically by using simulation experimentation that could give more varieties for d

     Evapotranspiration (ET) is produced from vegetation transpiration and soil evaporation. The ET measurements must be considered to study water management systems and irrigation (planning, designing and operating). This study is based on USGS (United States Geological Survey) data by the SSEBop (Simplified Surface Energy Balance) model to estimate the total annual amount of ET using ArcGIS software. The ET values were determined for seventeen years from 2003 to 2019. Also, these values for year 2020 were estimated based on the value of the monthly ET for seven months, i.e. until August by summation. The field data of gauge stations spread throughout Iraq for the year 2012 were used to verify the ET values for the s

The Qazaniyah study included the analysis of 18 wells and 2 springs for the dry period in October 2018 and the wet period in April 2019, including the analysis of physical and chemical properties and the study of heavy elements (Fe, Zn, Cd, Pb, Ni and Cu).The results showed that the water wells and springs for the two periods are highly mineralized and characterized by low alkalinity and very high hardness. Water was fresh in some wells and salty in the others, whereas it was fresh in the springs. Most  of the wells had sodium chloride type, except the wells 12, 7, 6, and 5 which were of Calcium chloride type. The springs for both seasons had calcium chloride type. Based on the World Health Organization criteria ,  all the well

In this paper, we investigate some methods to solve one of the multi-criteria machine scheduling problems. The discussed problem is the total completion time and the total earliness jobs  To solve this problem, some heuristic methods are proposed which provided good results. The Branch and Bound (BAB) method is applied with new suggested upper and lower bounds to solve the discussed problem, which produced exact results for  in a reasonable time.

The current study included the preparation of the aqueous extract of Raphanus sativus (Brassicaceae), commonly known as radish which is widely available throughout the world and has been used in folk medicine as a natural drug against many toxicants. The study was designed to evaluate the in vivo cytogenetic activity of the crude aqueous extract of R. sativus on mitosis on Allium cepa root tips as a plant test system. Root tips of A. cepa were tested for four hours with four concentrations of the crude aqueous extract (0.00, 5, 10, 20, 40 mg/ml). The study included a number of cytogenetic analyses such as mitotic index, phase index, and chromosomal aberration. The data s

Three Staphylococcus aureus isolates were selected after screening on nutrient agar
media amended with 100μg/ml of five heavy metals chlorides (i.e: Aluminum Al+2, Iron
Fe+2, Lead Pb+2, Mercury Hg+2 and Zinc Zn+2) from those isolates one S. aureus (S3) isolate
was selected depending on its resistance to all heavy metals chloride. Minimum inhibitory
concentration (MIC) for this isolate was 1000μg/ml for all tested metals chlorides except
Hg+2 (300μg/ml). Growth of S. aureus (S3) was not affected in presence of pbCl2 and AlCl2
for 72hrs; however, it was affected by ZnCl2 and FeCl2 during incubation period while
mercury causes no bacterial growth. In response to various temperatures bacterial isolate

Dust storm in Iraq is a climatic phenomenon. Dust storm data from 1992 to 2009 and data of main climatic parameters rainfall (1942 to 2010) and air temperature (1992 to 2009) of Erbil Meteorological Station were analysed. Results show an increase of the number of suspended and rising dust as well as dust storms with time. An average of the above mentioned period of all types of dust storms is individually compared with the last five years. Again, there is a noticeable increasing of the number of storms. From the results it can be seen that the months May, June, July and August have the most frequent dust conditions while months January, February, November and December the least. The annual precipitation trend line for water years has a s

Cryptography provides confidentiality and privacy by scrambling information. This paper presents a new cryptographic method using English letters frequencies and AVL tree to provide an increased level of confidence for exchanging information over networks especially internet which is insecure network.
Experiment results of the proposed method provide better security than the classical methods depending on number of parts used to build the key in this method.

Two simple, rapid and sensitive spectrophotometric methods have been
developed for the determination of amoxicillin (AMX) in pure form and
pharmaceutical preparations. The proposed methods are based on a coupling
reaction between AMX and diazotized p-amino benzoic acid or diazotized
procain in alkaline medium to form an intense yellow, water-soluble dyes that
are stable and have a maximum absorption at 435 nm using diazotized p- amino
benzoic acid and 450 nm on using diazotized procain. The calibration graphs
were linear over the concentration rangs of 0.4 to 10 5g mL-1 and 0.4 to 14 5g
mL-1 with a limit of detection (LOD) of 0.1877 5g mL-1 and 0.1916 5g mL-
1,molar absorbtivity of 1.914×104

The synthesis and characterization of new complexes of Mn(II), Co(II), Ni(II),
Cu(II) ,Zn(II) and Cd(II) ions with bidentate Schiff base 1,2-diphenyl-3-methyl-4-
benzaladene-5-oxo-pyrazole ligand which was prepared via the condensation
reaction of both benzaldehyde with 1,2-diphenyl-3-methyl-4-amino-5-oxo-pyrazole
in acidic medium. The complexes were synthesized by treating an ethanolic solution
of the ligand with appropriate amount of metal salts [1:2] [M:L] ratio. The
complexes were characterized by metal and elemental analysis, FTIR, electronic
spectra, molar conductivity, magnetic susceptibility and mole ratio. According to the
obtained data the probable coordination geometries of manganese, co

Surface and Groundwater's has an associated hydrological relationship affected by
deferent factors related to Geological, Hydrological and Climatic conditions where these
factors control the circumstances of groundwater movement in shallow aquifers as well
as the quantity of water can be gained or lost from the aquifer and river. In Badra -
Jassan basin, the main River is Galal Badra which flows from inside Iranian territory
with two tributaries and discharge water in Al- Shuacha marshes to the south , most of
river water depends on water gained from inside Iranian territory. Part of the
groundwater discharge to the river basin in specific areas according to the topography of the river valley as well as height of gro

Seven carbon sources; Glucose,Sucrose,Soluble starch,Pectine,Dibis,Wheat seeds
extract and Rice grains extract extract individually incorporated in different liquid
media were evaluated for their effects on sporulation,percent of spores germination
and fungal biomass dry weight of entomopathogenic fungus Beauveria bassiana for
four incubation periods ;1,2,3 and 4days at 28±1c. Carbon used in the basal medium
as 8g/l.The results showed that glucose,rice grains extract,wheat seeds extract were
significantely superior(p<0.05) to induce the fungal sporulation which recorded
67,69,68×10 5spore/ml after 4 days of incubation, respectively.Soluble starch was more efficiency for spores germination,whereas the percent of

The results of the present investigation indicated that exposing the eggs of Dacus ciliatus to incremented doses of gamma ray, showed that eggs were highly sensitive. The hatchability was significantly reduced with the increase of doses, in comparison with the control treatment.
The negative effect of irradiation was continued to the subsequent developmental stages, and on adult emergence and longevity. The dose of 10 Gy reduced significantly the fecundity and hatchability at all mating types, and there was no potential to induce complete sterility in the emerged adults. Prepupal larvae were less radiosensitive than the eggs. Adult emergence at 10 and 20 Gy was 88 and 56% respectively. The fecundity was reduced significantly in two

Field observations revealed the occurrence of volcaniclstic units (pyroclastic
units) within the Muqdadyia Formation (Pliocene) in Injana area, southern Hemrin
anticline; these rock-units located along Tayawi, Magrin and Zarloukh sections and
has been called as a volcaniclastic unit of Muqdadyia Formation.
the facies analysis for the volcaniclastic units is part of succession which was
deposited in a fluvio-laucustrine environment. This succession is divided into eight
facies on the basis of deposition and transportion settings into:- 1-Primary tuff rock
(non-reworking), this represent the surge facies (A1) and fallout facies (A2) which
deposited in a quiet environment (lake or marsh) near Zarloukh

The studied area is a part of the Arabian plate located within the High Folded Zone of the Zagros Fold-Thrust Belt in northeastern Iraq (Kurdistan Region). The Study area deals with the Shakrok Anticlines is located between Safin Mountain and Sork Mountain. These structures are formed during the Alpine Orogeny in Cretaceous-Tertiary period. Generally, the folded structures are trending NW-SE direction which is parallel to the main Zagros Orogenic trends.

The exposed stratigraphic succession of the studied area that represented by 4 formations deposited from the Early Cretaceous which are Shiranish, Aqrah, Bekhme and Qamchuqa formations. Shakrok Anticline are asymmetrical, double plunging and verging toward northeast. This establi

In this paper consideration is given to viscose, incompressible, time-depended and
non-Newtonian fluid flowing in a straight pipe with square cross-section under the
action of pressure gradient. In particular consideration is given to second order fluid
flow which can be represented by the equation of state of the form:


 
2
1
2 4
k
ij ij ik kj T  e  e e i,j = 1,2
Where η viscosity coefficient and ζ is normal stress coefficient and, Tij and eij , i,j =1,2
are the stress and rate of strain respectively. Cartesian coordinate system has been used
to describe the fluid motion and it is found that equations of motion are controlled by
Reynolds numb

We will also derive practical solutions using predictive analytics. And this would include application making predictions with real world example from University of Faculty of Chariaa of Fez. As soon as student enrolled to the university, they will certainly encounter many difficulties and problems which discourage their motivation towards their courses and which pushes them to leave their university.
The aim of our article is to manage an investigation of the issue of dropping out their studies. This investigation actively integrates the benefits ofmachine learning. Hence, we will concentrate on two fundamental strategies which are KNN, which depends on the idea of likeness among data; and the famous strategy SVM, which can break the

In this study Titania nanotube arrays were prepared at room temperature (~25 ºC)
via electrochemical anodization process of pure titanium foil in glycerol base
electrolyte, different concentrations of ammonium fluoride salt (0.5 and 1.5wt.%)
were added to the electrolyte as a tube enhancing agent. When anodizing Ti in 0.5
wt. % NH4F, nanotubes are formed with 54 ± 10 nm tube diameter, 20 ± 3 nm wall
thickness and 1.76 <m tube length. When anodizing Ti in 1.5 wt. % NH4F,
nanotubes are formed with 69 ± 10 nm tube diameter, 29 ± 3 nm wall thickness and
2.71 <m tube length. The morphology and structure of the Titania films were studied
by scanning electron microscopy (SEM), X-ray diffraction