JOURNAL OF EDUCATION AND SCIENCE

The economic evaluation of the exploration sulfur well depends mainly on the elemental sulfur content and its association other factors, so a sample of sulfur rocks extracted by a special excavator for one of the exploratory wells was studied and in the form of a bore hole rock. The elemental sulfur ratio reached 12.8% an important ratio in estimating the explored sulfur reserves and through XRD, the predominant crystalline composition is calcite mineral with hexagonal crystalline form and with a lesser percentage in orthorhombic crystal sulfur this supports one of the theories that explained the formation of sulfur.
Also, the mine Mishraq sulfur extracted by the underground melting method (known as the Frasch process) was studied chemically, and the elemental sulfur ratio reached 98.58% and the bituminous material 1.157%. Also, the SEM scanning electron microscope showed the presence of nanotubes of size (20-44 nm) belonging to the carb-sulfur compounds in the SEM, which are observed for the first time in this form.

This study has included a modulation of the rheological properties of asphalt by a catalyst chemical treatment with polycarbonate, and the microwave technique was used at a power of (360) watt at time intervals. Furthermore, the modulation and treatment were done in the presence of sulfur and polycarbonate. The formed rheological properties of the new asphalt samples were studied which include (permeability, softening point, ductility and penetration index). Those asphalt samples of the new rheological properties could be used in paving field and some other samples could be used as anti-moisture materials.
The best asphalt samples with new rheological properties and those conformable with the properties of roads authority and Iraqi bridges were tested as a tiled asphalt since they were studied in terms of conducting Marshall tests and comparing them with the original sample in order to show the possibility of using the modified samples in the tiling and the obtained results were excellent in terms of stable creeping values. In addition the aging test was applied on the samples that contain good rheological properties.
Moreover, the modified asphalt has shown higher dissociation values in comparison with the original asphalt, so the modified asphalt has more resistant to high temperature and acid rains and shows an important characteristic of the quality of the asphalt that enables the modified asphalt to stick more closely to the aggregate, which gives higher resistance and greater operating age life to the streets.

This study was included treatment of the Dura asphalt with lignin as a natural polymeric additive and air blowing with three paths.
The first path: the rheological properties of the asphalt were modified by adding the lignin to the asphalt and in various proportions in the presence of anhydrous aluminum chloride as a catalyst for this process at the optimum conditions for the catalytic oxidation process that was identified which is 150 centigrade and a time of 60 min.
The second path : the rheological properties of the asphalt were modified using the use of lignin as an additive and with the presence of 1% sulfur(by weight)at a time of 60 minutes and a temperature of 180 ° C which is the optimal conditions for the non-catalytic air blowing process that was identified.
As for the third track, the lignin was treated with asphalt without the use of anhydrous aluminum chloride under optimal conditions for the non-catalytic process.
The study showed asphalt with completely different rheological properties compared to the original asphalt, which represents the primary goal behind the continuous quest for altering the rheological specifications of the original asphalt in a way that is compatible with the nature of use in different and specific fields, some samples can be using in paving as in samples(,AS19,AS20 ,AS50).As well as a moisture inhibitor and flattening as in samples(AS22,AS40,AS41 ,AS51, AS52).The use of asphalt in various fields is determined depending on the measurements made, ductility ,softening point,penetration,asphaltenes percentage,penetration index,aging test,marshall test .

This work involves,the preparation, new ligands 4-[N- (2,4-Dihydroxybenzylidene) imino] antipyrinyl Serine (L1) or with Theronine (L2),. from these ligands ,ten Complexes have been synthesized with metal ions Co(II) ,Ni(II) Cu(II) Zn (II) and Cd(II) in molar ratio (1:1) Metal: Ligand and these complexes have been characterized on the basis of physiochemical,investigations(1HNMR),(IR) electronicspectroscopy(U.V-Vis), molar,conductance, magnetic moment measurement, Thermal analysis (TGA), ,elemental analysis, Powder X-ray diffraction and spectral studies. Infrared data suggest that the ligands( L1) and( L2) behave as tetradentate ligands and coordinated through (N, N, O, O) as adonor,atoms sequence towards the metal ions, and they give an square planer and tetrahedral complexes, finally some of these,prepared complexes have been screened for their antibacterial activities against two classes of human pathogenic; bacteria Gram positive eg: Staphylococcus.aureus, and Gram negativebacteria including,Pseudomonas,aeruginosa, Klebsiella pneumoni and.Escherichiacoli, The performance results explain that the metal complexes have greater action more essential than the free ligand

A sensitive spectrophotometric method has been developed for the determination of thiamine hydrochloride by oxidative coupling reaction of thiamine with the reagent 4-aminoantipyrine (4-AAP) in the presence of copper sulphate as oxidizing agent in alkaine medium forming a reddish brown colour. The product show maximum absorption at 335 nm. The molar absorptivitiy is 26410.59 l/mol.cm for concentrations obeyed Beer’s law in the range 0.2-18 μg.ml-1. The recovery was 100.93 % with relative standard deviation < 2.0 % for thiamine hydrochloride.Thiamine and reagent 4-AAP product was formed in the ratio of 1:1. The stability constant of the product was 3.39×106 l.mol-1 for thiamine hydrochloride indicating the good stability of this product. The optimum conditions for full colour development are described and the proposed method was applied successfully for determination of thiamine in the pharmaceutical preparation (Neurorubine). The common excipients used as additives in pharmaceutical do not interfere in the proposed method.

Abstract:
This study includes calculation of the potential stickiness (S*) and apparent activation energy (AAE) by the adsorption process of some aromatic carboxylic acids using sand (clay) as a new adsorbent material. This clay was collected from dust storms coming to the city of Mosul. The obtained results showed that physical adsorption which is achieved by applying the modified Arrhenius equation through the values of (S *) and (AAE) which have low values and bear a negative charge is preferable Adsorption process occurs in two-step mechanism. The effect of the concentration of the acidic solution, temperature and the substituted groups SO3, NO2, OH, NH2 on the aromatic ring) was studied to clarify the nature of the association between organic carboxylic acid anions and inorganic metal oxides to form a complex surface model. The study concluded that the values of (S *) for all acids were less than one and they were more than the value of zero. Also, the values of (AAE) gave an indication that the adsorption process is exothermic and spontaneous. The presence of water molecules and (H+) ions in solution is very important to change the nature of the clay surface.

The present research includes a comparative morphological characters of pollen grains and seeds of (8) cultivars belonging the species Pyrus malus L. namely ("EarlyGold", "GrannySmith", "Royal Cala", "Red Delicious", "Golden Delicious", "Honey Crisp", "Mcintosh", Cox") and (6) Cultivars belonge to the species Pyrus communis L. namely ("Coneference", Decana", "Bonica", "Alkhatuni","Alothmani", "William) which cultivated in northern of Iraq. Were examined by light and scanning electron microscope (SEM). The result of pollen grains showed that pattern tricolporate and the shape in polar view triangular or spherical -triangular or tetrangular but in equatorial view spherical or ovate and surface configuration was striate in all cultivars of the species. The morphological characters of seeds (Shape, Color, Dimension of width and Length, Number of seeds in fruit), in addition to indumentum were found to be diagnostic value for separation cultivars from the two species. In addition to its surface configuration, it was Striate in "EarlyGold", "RoyalCala", "Honey Crisp", "Mcintosh" and "Cox" and Striate papillae in GrannySmith, while the "Coneference", "Decana" and "Bonica, Alkhatuni, and Alothmani had a surface configuration pitted, and Irregular Reticular in Red Delicious and Reticulate papillae in cultivar William, while Golden Deliciou was unique as having an alveolate surface, The quantitative and qualitative morphological characters of pollen grains and seeds were found to be diagnostic value for separation cultivars from the species.

Abstract
The Boltzmann transport equation is the basic equation for solving the transport of charge carrier (electrons, holes) problems in semiconductor devices. The distribution function has been obtained from the solution of this equation. The distribution function is important in calculating semiconductor properties, which can be used to calculate the average electron energy, the charge carrier concentration, and other properties. In this work the semi-classical Boltzmann transport equation in silicon was solved using analytical / numerical methods in steady state case in momentum space. The analytical solution is requires expressing the distribution function using Legendre polynomials expansion the first two terms of the expansion, by taking into account the effect of both acoustic elastic scattering and nonelastic scattering in addition to the effect of non-parabolic energy band structure. In order to obtain the numerical solution of Boltzmann transport equation the finite difference method is used. The differential equation is transformed to linear difference equation which can represented by matrices. Numerical systems with different dimensions are designed to calculate the distribution function with the least possible time to maintain the accuracy of the solution for different applied electric field which represent the low and high field regions at temperatures T= (77, 300) K. The obtained results showed good agreement with published data that used other calculation methods such as the Monte Carlo simulation method for all the system used in this work.

A study of the influence of the parameters design, such as the refractive index of the core, the cladding and the radius of the core on propagation constant (β) of single-mode optical fiber in optical communication region (1.2-1.6) m have been investigated. Material, waveguide, and profile dispersions are analyzed and investigated. Three models of optical fibers with different relative refractive indices () (0.004, 0.007, 0.01) at a wavelength equal 1.55 m, and three models of core radius (3,4,5) m is taken in the count. Numerical simulations and modeling are arranged depending on weakly guiding approximation for solving homogeneous wave equation derived from Maxwell’s equations. Our modeling solved by the aid of MATLAB software. Material and profile dispersion have no significant change for various relative refractive index, while waveguide dispersion is affected by the change of relative refractive index. the waveguide dispersion increased by increasing core diameter and the profile dispersion decreased as the core diameter increased. There is no effect on martial dispersion by increasing the core diameter.

As the conjugated polymers are doped with some electron donor or acceptor dopants, their electrical conductivity increased thoroughly to about 10-6 Ω-1.cm-1. The doping of the polymers may give an n or p semiconductor characteristic according to the types of the dopants that are used. Within the frame of this work, four types of conjugated polymers with benzothiazole as a major moiety in their backbone have been prepared. The prepared monomers and polymers have been characterized by FTIR spectroscopy. Elemental analysis of the polymers (CHN) demonstrates their chemical structure while the DSC thermal analysis illustrates its Tg. The polymers were doped with two types of dopants, iodine and sodium iodide. The electrical conductivity of the doped polymers was measured with three probe cell. The results show increasing in the electrical conductivity with dopant concentration to some levels. The activation energy of the electrical conductivity process was also studied by measuring the electrical conductivity in different temperature. According to the magnitude of the activation energy, we can conclude that the chain flexibility is the dominate factor that influenced on electrical conductivity. Hall Effect and hot probe measurements reveal that the polymer can be considered as n or p type according to the type of the doping. It was concluded that the doping with iodine produced an n-type while the doping with sodium iodide produced the p- type.

Abstract
A new species of juniper is Juniperus macrocarpa, permissions not previously registered in Flora of Iraq that were composed ( Guest researchers and Ali al-Rawi,1966) so only two species of Juniperus oxycedrus and Juniperus polycarpos were registered at the time. The research included a classification of the species Juniperus which belong to the Cupressaceae family that grown a wild plants in north of Iraq, using the morphological characteristics of (3) species of veins mentioned in (7) sites distributed in provinces of ( FNI,MAM and MSU )Nineveh, Dohuk and Sulaymaniyah.
The study includes the characteristics of stems, branches, bark, needle leaves, male and female cones, seeds and flower buds, as well as examining the overcoming of appearance between species and individuals of the same species in the studied sites, and sometimes the species have clear variations among them and the individuals of the same species did not show marked changes, and it became clear that the studied morphological characteristics have taxonomic. Significant in the diagnosis and isolation of species from each other, and the study was reinforced with photographs, shapes and illustrations, as well as the study showed that sexual characteristics (male and female cones and flower buds) are more proven compared to the rest of the characters, and It has a significant and taxonomic role in diagnosing the studied species into groups, so the needle leaves showed clear variations, which makes them the task of classifying them either in their quantitative or qualitative characteristics.

The present work deal with the morphological characters of the fruits and seed of the cultivars belonging to the species Morus alba L. Namely ("Beautiful Day", "Big White", "Rease", "Greece", "Pearl", "Border Sweet", "Pendula"); Morus latifolia Poir ("Kokuse Korean"); Morus rubra L. ("Amarah"); Morus nigra ("Shami"); Morus macroura Miq ("King White"); "Dwarf" and Morus hybrid ("Tice", "Wellington") Which cultirated in North of Iraq.
The study includes the characters of the fruits (Shape, Color, Dimension, Size, Number of the fruitlet in the fruit) and the characters of the seeds (Shape, Color, Dimension, Number of the seeds in the fruit, and surface ornamentation).
The results of some morphological characteristic of the fruits and seeds examined by light microscope (L.M), in addition to the surface ornamentation of the seeds examined by scanning electron microscope (SEM). Showed five type of the surface ornamentation (Reticulate, Muricate, Foreate undulate, Polygonal, and Ruminate) for cultivars species studied, showed that importance value in the separation between the cultivars of the species studied belonging to the genus Morus L.

Glasses with compositions (100-x) % Na2B4O7–x % MO (X=10,20,30,40) where (M) is Ba, Mg and Ca, are prepared using conventional melt quenching method. X-rays diffractions are performed. The result of (XRD) confirm the amorphous nature of the samples. The measured density increases with increasing content of BaO, MgO & CaO in glass network. The position and shifting rate of absorption edge, optical band energy (Eopt) and band tails energy (Eo) were investigated. The Eopt and Eo values of all glasses studied in this work were found to be comparable with the values corresponding to some semiconductors. The structure of the glasses was investigated by means of IR spectroscopy. It found from the experimental results of IR spectra that the groups (BO3)- and (B2O7)- are dominant the structure of these glasses. Also It is found that the shifting in band position is small with increasing of (Ba, Mg, Ca) oxide in the glass network.

In this thesis, Anmber of heterocylic compound with five and six memberd, Such as substituted imidazole, triazin and thiazolidine.
The N-(1,3-benzothiazol-2-yl)-2-chloro acetamide compound(1) was prepared from the reaction of the compound (2-amino benzothiazole) with chloroacetyl chloride. The product(1) was reacted with thiourea and urea to prepare both (imidazole -2-thione (2) and imidazole -2-one(3)) , respectively. As did compound(1) with thiosemicarbazide and semicarbazide to prepared the two compounds (1,2,4-triazine -3-thione (4) and 1,2,4-triazine -3-one (5)) ,respectively. Also compound(1) with ammonium thiocyanate to prepare the compound thiazolidin -4-one (6). From the reaction of compound(1) with phenyl thiourea attended imidazole -2-thione(7).
Also from the reaction of (2-amino benzothiazole) with phthalic anhydride or malic anhydride attended compounds (8) and (9) ,respectively. And by reaction compound(8) or (9) with o-phenylene diamine attended compounds (10) and (11) ,respectively. The synthesized compounds are identified by physical (melting points, colour change) and spectral methods such as (IR, proton-NMR).

Abstract: Enzymatic browning by tyrosinase and nonenzymatic browning (Maillard reaction) are responsible for producing new compounds which contributes considerably to the undesirable of aroma, taste and colour in food. In this study, tyrosinase activity and browning intensity in quince juice were inhibited by treating them with antioxidant compounds vanillin, glutathione and melatonin as compared to the control. The maximum inhibition percentages of Tyrosinase were 83, 68.8 and 90.3 % and the maximum inhibitory effects of browning intensity were 13.9, 9.7 and 29.8% respectively.
For untreated quince juice which heated to 5 hours at 100 oC, the results showed increasing in A294, Browning intensity (A420) and reducing power, as well as decreasing in reducing sugar, free amino group, phenolic compounds contents and inhibition percentage of lipid peroxidation. The decreasing of A294, browning intensity and increasing in reducing power were showed after treating with (10mM) vanillin and (8mM) glutathione compared to control. Conversely to glutathione, the addition of vanillin to quince juice revealed increasing in inhibition percentage of lipid peroxidation, reducing sugar and phenolic contents and decreasing in free amino acid content compared to control. Inhibition Mode of tyrosinase by melatonin is non-competitive. The Km value remains constant (1.96mM), while Vmax reduced from 228.13 to 114.06 U.ml-1.min-1. Inhibition constant Ki value was 6.9 mM.

A simple, accurate and sensitive indirect spectrophotometric method has been developed for the determination of salbutamol sulphate and mefenamic acid in pure forms and in pharmaceutical preparations (capsule, syrup, tablet). This method based on the bromination of the drug with N-bromosuccinimide in acidic medium and the unreacted oxidizing agent react with constant amount of Azur-A dye solution due to bleach their colour and measured the absorbance of the residual colour dye at 606.5 nm.The molar absorptivity for salbutamol sulphate and mefenamic acid are 2.3 × 104 L.mol-1.cm-1 and 8.1× 103 L.mol-1.cm-1 respectively. Beer's Law was obeyed over the concentration range of 1.6 -12.8 µg/ml for salbutamol sulphate and1.6 -13.6 µg/ml for mefenamic acid. The limit of detection (LOD) were 0.0367µg/ml and limit of quantitation (LOQ) were 0.1226 µg/ml for both drugs. In addition, the recovery levels of the drugs were in the range 100.56% and 100.74%. The method was created to be simple, cost-effective and rapid because it does not involve any solvent extraction. The developed method was successfully applied for the determination of the studied drugs.

Abstract
Coronavirus outbreak occurred in late 2019 and called (COVID-19), caused by SARS-CoV-2 which firstly emerged in Wuhan city/China. This virus mostly attacks the respiratory system and therefore is more likely to destroy lung tissue and cause pneumonia; although lung is the target tissue but many organs of COVID 19 patients affect by virus invasion and showed numerous Physiological consequences. Angiotensin converting enzyme-2 (ACE2) receptors for the virus attachment are distributed in human's tissues including “lungs, heart, kidneys, intestines, brain and testes” that are recognized as a possible targets of COVID-19.The vital functions of these organs may impaired with different levels as a result of viral infection and replication. Patient with type A especially those formerly have been identified with cardiovascular diseases in particular increased blood pressure, are more expected to develop acute COVID-19 symptoms. Clot producing disorders with SARS CoV-2 infected patients were observed firstly by researchers in China. Thus untreated patients revealed large arterial pulmonary clots can put permanent pressure on the heart, leading to cardiac attack. Anxiety about the coronavirus outbreak is extremely common. Therefore, some individual may showed a huge concern that can disturb their regular life. Stress and fear from infection can be devastating and cause powerful excitements in children and adults. Therefore this study aims to shed light on pathophysiological consequences and stressful conditions of COVID-19 in patients including many of boby organs and ABO system.

Current study tackled potency of MSG and NaNO2 to induce histopathological changes in eye texture of Swiss-mice and protective role of grape seed-oil against toxicity these substances may cause.
In this study, 36 adult mice divided into six groups with control. One group was dosed with MSG at 9g/kg; another was injected with NaNO2 at 110mg/kg for two months, groups with interference of two substances, and two groups with interference of grape seeds-oil with each substance.
Results showed emergence of histopathological lesions. In treatment with MSG, there was wide destruction and damage to photoreceptor cells and outer, inner nuclear layer, separation corneal stroma and gliosis in optic nerve. In treatment with NaNO2, damage was extensive in components of eye; it was noted the appearance of roseat pattern in outer, inner nuclear layer, necrosis of outer plexus layer and contraction of lens fibres. When treating with an interference of MSG and NaNO2, damage was observed to the surface epithelial tissue of cornea, stroma fibres, reduction in fibroblasts, necrosis in some cells of ciliary body, and in retina extensive damage was observed in its layers.
When treating by MSG with oil, increase in the inner plexus vasa, nerve fibres, and the inner nuclear layer was observed and slight damage to the outer pieces of the photoreceptors. When treating with NaNO2, oil, infiltration of inflammatory cells appeared in the ganglion cells, increased vasa, edema and hyperplasia in the epithelium of the lens.

Abstract
The drift-diffusion model is considered as one of the most important models which is used to describe the characteristics of semiconductor devices and can be applied to wide range of applications started from micro up to nano scale devices after applying the suitable correction on it. The Poisson, continuity, and current equations are considered as the basic equations for semiconductor devices, these equations are partial differential equations, used in the drift diffusion model. These equations described the semiclassical electron and hole transport in semiconductor in the presence of uniformly applied electric field. In this paper a numerical method (finite difference method) has been used to find the solution of these equations depending on Gummel method and Scharfetter-Gummel scheme, the drift diffusion model is applied after many approximation and suitable boundary condition which has been considered for the pn diode in both equilibrium and non-equilibrium cases at room temperature, from this simulation model a MATLAB program has been prepared to obtained diode parameters as a function of distance at the junction region, these parameters are (conduction band, carrier concentration, electric field and charge density) two diode model has been tested with different doping concentration the first with N_A=N_D and the second with N_A>N_D also the diode characteristic in the forward biased is obtained.

Abstract
This research was included partially purification of lipoxygenase (LOX) from serum of patients with epilepsy using ammonium sulfate precipitation, dialysis and ion-exchange chromatography with specific activity (0.751 U / mg) , (0.935 U/mg) and (2.60 U/mg) respectively . Optimum conditions for enzyme activity were determined. The best enzyme activity was showed at 7 minutes of incubation time , 3 minutes of reaction time, pH = 7, temperature 40Cº and finally substrate concentration (linoleic acid) was (1.2 mmol/L) . By applying Michaelis-Menten and Lineweaver-Burk Equations, Michaelis-Menten constant (km) and Vmax values were found 0.3 (mM) and (0.9 U/ml) respectively. Also this study included the effect of some antiepileptic drugs such as valproic acid , carbamazepine and acetozolamide. Acetazolamide showed the highest inhibition of lipooxygenase activity(96.2٪) , valproic acid (95.6) and Carbamazapine (95.1٪). Inhibition type was studied and the result showed noncompetitive inhibition by using Lineweaver-Burke plot for all above drugs.

E-learning today has a significant impact on learning, due to its ease of accessibility and the fact that it does not take into account geography, politics, or narrow economic interests. This significance gains a special status, especially when having doubts regarding the possibility of a final settlement of the pandemic Coved-19 in a short period. Education using digital technologies allows students to expand their access to knowledge resources and to special skills which support the curriculum, as well as carrying using important features such as continuous assessments that enable them to advance in the field of research and to develop their ideas, and perhaps provide more opportunities to extend their knowledge and stimulate critical thinking that is formed by allowing students to gain knowledge and reach conclusions by themselves. With the spread of this huge number of smartphones, also of the availability of internet service at any time and place allows digital services to go beyond many boundaries to share information. “Cloud” computing technology provides optimal solutions for setting an effective infrastructure that allows researchers, teachers, and students to access services from anywhere and by using any kind of digital devices connected to the Internet to get valuable resources and services and to take advantage of the capabilities and functions provided by these modern environments. This contributes to providing the tools for supporting learning, teaching, and cooperative work. “Cloud” computing gives students and teachers a more convenient and effective learning experience.

This research included a study of some Biochemical variables of male rats Wister with Induced liver Cancer and a study of the effect of extracts of three parts Annona Muricata, including seeds, core, and leaves to study its effects on the disease. The animals were divided into eight groups: I Control group, II treated with TAA, III treated with extract Core, IV treated with extract Seed, V treated with extract Leave, VI treated With TAA with extract Core, VII treated with TAA and extract Seed and, VIII TAA with extract Leave. In this study, the measurement kit was used to measure the Total Protein, Alkaline phosphatase, Total bilirubin, Aspartate transaminase, Alanine transaminase, and Alpha-fetoprotein. Manual Methods used to estimate Glutathione, Malondialdehyde, and Paraoxonase. The results showed a significant increase in the tumor-infected rats of Malondialdehyde, Alkaline phosphatase, Total bilirubin, Aspartate transaminase, Alanine-transaminase, and Alpha-fetoprotein compared to the control group, while there was a significant decrease in rats which treated with TAA of Total protein, Glutathione, and Paraoxonase compared to the control group. The results show a significant decrease in the levels in tumor-affected animals and treated with extract seed for each Malondialdehyde, Alkaline phosphatase, Total bilirubin, Aspartate transaminase, Alanine transaminase, and Alpha-fetoprotein compared to the group of rats affected and treated with the extract Core, and leaves, The results also showed a significant increase in the affected rats which treated with extract seeds for the level of Total protein, Glutathione, and Paraoxonase compared to the group treated with Core, leaves.

One of the techniques to increase the value of the software quality is refactoring - the set of activities for code enhancement through altering inner structure and not altering outer behavior of code. It is a technique to clean-up the source code that decreasing the opportunities of code faults. Refactoring can be defined as one of the most significant practices for maintaining the advanced software systems. It has been indicated by the empirical studies that refactoring has positive effect on maintainability and understandability of the software systems. This study introduces a literature review of 22 researches that study and summarize the influence of refactoring and their effect on the attributes of software quality specially maintainability. Through the review, the study sums the following points: (1) applying refactoring activities will increase the values of some attributes of quality like Understandability and maintainability. (2)There are several factors that affect reconstruction activities, including cohesion, coupling, hiding of information and encapsulation, (3) Refactoring helps to improve the source code without changing the behavior of the program, (4) refactoring activates can be applied many times to the source code.

The research included a method for preparing zeolite by utilizing the components of clay mineral ores (silica and alumina). The two ores(Local Silicate and Bauxite) were studied through chemical analysis, X-ray diffraction and fluorescence. The results showed that they contained good quantities of these two substances, which were converted into sodium silicate and sodium aluminate, then the zeolite was prepared by hydrothermal method at (pH=11) in the presence of the structural directing agent (triethylamine) then converted to the formula (H-zeolite) to improve its acidic properties, And then a number of measurements have been done for the prepared zeolite, which is a thermo gravimetric analysis (TG) ,it showed that it contains amounts of moisture and crystallization water as well as its thermal stability at (700°C). As for the results of X-ray diffraction (XRD), it showed its good crystallization rate and its possession of a crystalline cube system, and the measurement of X-ray fluorescence (XRF) showed that it had a high percentage of silicon and aluminum, this indicates a balanced and equal interaction between these two materials when preparing of zeolite. The measurement of the scanning electron microscope (SEM) showed the high pore system and the fine particles that were around (18.17 nm), Finally the measurement of adsorption by The intention (BET) that explained the prepared zeolite have a high surface area (244.3766 m2/g).

A chatbot is a computer program which is designed to interact with users and answer questions. Nowadays, chatbots are one of the most common systems that are used in many fields and by different companies to achieve different tasks. Cloud computing is gaining increasing interest. A myriad of fields and applications have been developed based on cloud computing.
In this paper, a college chatbot was developed and implemented to assist students to interact with their college and ask questions related to faculty, activities, exams, admission, amongst other tasks. Text similarity algorithms were adopted to achieve the proposed system. More specifically, cosine similarity and jaccard similarity algorithms were used to find the closest question in the dataset. Firebase real-time database, which is one of the Google cloud services, was used as a connector channel between users and the chatbot server.
Experiments were conducted to evaluate the performance of cosine similarity and jaccard similarity methods, and to compare the results of both. In addition, real-time database was also evaluated as a chatbot connecter channel.

The research was aimed to used bauxite ore that has a high aluminum minerals which available in Al-Hussainiyat near al-Anbar district as a source of alumina which it used as a catalyst support after being loaded with palladium metal , The components of both bauxite ore and prepared catalyst were studied by X-ray diffraction and fluorescence as well as thermogravimetric analysis (TGA) of the prepared catalyst , After this the catalyst was used in the treatment of kerosene which is distilled at (150-260C0) under different conditions of the (temperature , reaction time and the ratio of catalyst) to know the optimal reaction conditions that determid by measuring the (FTIR) and chemical analysis. The optimal conditions: temperature was (250C0), reaction time was (2hours) and the catalyst ratio was (2%) .The catalyst appeard the ability to dehydrogenation reaction and reforming to form olefinic and aromatic compounds. The research also included the study of n-paraffins separated from kerosene samples that were treating in different temperatures (150,200,250C0 ) using (1HNMR).The results showed the ability of the catalyst towards catalytic cracking and converting n-paraffins to iso-paraffins

Abstract
The study included thirty-six isolates of rhizobia bacteria were isolated from the nodules located on the roots of nine types of leguminous family plants that were planted in four areas of the city of Mosul for the winter agricultural season for the year 2020-2019, where they studied the phenotypic and agricultural characteristics of the isolated bacteria in addition to a study of resistance and sensitivity to the isolates of rhizobia bacteria The study included ten antibiotics, and resistance ratios differed between isolates groups, where the highest resistance rate for residual bacteria isolates was 100% for Nystatin and Amoxicillin, and the lowest resistance was for Tetracycline and Streptomycin, as it reached 22.2%. As for the rest of the antibiotics, there is a difference between that.
As for heavy metal salts, all the isolates of rhizobia bacteria under study were resistant to both CdCl2 chloride and CoCl2 cobalt by 100%, while their resistance to nickel chloride NiCl2 was 77.7% and the lowest resistance to heavy metal was mercury chloride HgCl2, reaching 33.3%.
The plasmid DNA content was described for the studied isolates, as the results showed that there are two types of plasmid DNA bundles, the first type close to large-scale gel drilling called Mega plasmid represents symbiotic plasmids that carry the genes of contract formation and nitrogen fixation and the second type moves far from the gel drilling and they are sizes small equal representing non-symbiotic plasmids.

In this research new compounds containing quinazolin-4(3H)-one nucleus linked to heterocyclic moieties were synthesized using ethyl (4'-oxoquinazolin-3'-yl) acetate (2) as a synthon. This compound was synthesized via 4-quinazolinone's (1) reaction with ethyl chloroacetate in the existence of K2CO3 as a base and acetone as a solvent. The ethyl α-(4'-oxoquinazolin-3'-yl) acetate (2) was converted to the corresponding hydrazide through its reaction with hydrazine hydrate (85 %). Compound (3) was reacted with two of acyl chlorides to synthesize the diacyl hydrazine compounds (4,5). The compound (5) was cyclized to the corresponding 1,3,4-oxadiazole (6) in presence of phosphorous oxychloride. The formyl derivative (7) of the hydrazide (3) was synthesized via its reaction with formic acid and consequently cyclized by phosphorous oxychloride to the corresponding 1,3,4-oxadiazole (8). The hydrazide (3) was also converted to the thiosemicarbazide derivative (9) by its reaction with ammonium thiocyanate under acidic conditions. Whereas other substituted thiosemicarbazide derivatives (10-12) were synthesized by the reaction of hydrazide (3) with organic isothiocyanate compounds. The resultant compounds (11, 12) were cyclized under basic conditions (4% sodium hydroxide solution) to give 1,3,4-triazole-2-thiole derivatives (13,14), whereas the cyclization of compounds (10-12) was performed under the acidic medium (conc. H2SO4) to give 2-substituted amino-1,3,4-thiadiazoles (15-17). On the other side, the hydrazide's (3) reaction with isocyanate compounds affords the semicarbazide compounds (18,19). These compounds were cyclized under the basic condition to afford 1,3,4-triazol-2-ol compounds (20,21). The structures of the synthesized compounds were corroborated depending on the physical and spectral data.

The face is the most critical component which is clear on first sight for an individual. Delicate tissue of the face alongside the fundamental dentoskeletal tissues portrays the facial attributes of a person. Social affirmation, mental well-being, and self-esteem of an individual are related to physical appearance. Strikingly, facial properties are regularly packed in profile. Orthodontic assurance and treatment orchestrating are continuously being established on profiles rather than basically on Angle's concept of molar relationship. It was seen that particular skeletal exact guidelines, proportion of constitution of the delicate tissue, and facial solid position can affect the assessment of the profile.
One of the uncommon challenges in orthodontics is the treatment orchestrating and the leading body of orthognathic careful cases. These cases require a mix of both orthodontics and orthognathic medical procedure to accomplish an even impediment, appropriate function, and agreeable facial feel. Early analyze of malocclusion is exceptionally helpful to get legitimate teeth straight. Thusly, in this paper we built up a straightforward PC supported program that could help foreseeing teeth impediment. In other word, we take an image of individual and order it into one of the three primary types Class I, Class II, and Class III and predict the after all treatments of Class II and Class III. This study gives information which can be used in treatment orchestrating by authorities, for instance, orthodontists, prosthodontists, plastic specialists, and maxillofacial experts, who have the ability to change the delicate tissue facial highlights.

Abstract
In this study 10 local isolates of yeast Saccharomyces were obtained from the local markets of Mosul .The Isolates were diagnosed by morphological and cultural characters in addition to biochemical tests. the results of the tests showed that they belong to the Saccharomyces cerevisiae type . Local isolates were tested for resistance to 8 different types of antibiotics and 5 salts of heavy metals. all isolates were resistant to each of Chloramphenicol , Ampicillin , Tetracycline and Streptomycin at 100%. As for the Erythromycin antibiotic most of the local isolates were resistant except for the isolates (SY4 , SY5 , SY6) As well as Amoxicillin all isolates were resistant except for (SY4) . While the isolates showed sensitivity to Nystatin at 80% and for Flagyl at 90% . The isolates also showed resistance to all Zinc chloride ZnCl2 , Nickel chloride NiCl2 and Cobalt chloride CoCl2 at 100% , as for mercury chloride all isolates were resistant except for (SY2) which showed sensitivity to it . sensitivity of the isolates was clear to Cadmium chloride CdCl2 except for the isolates (SY3 , SY9 , SY10) .

New cobalt (II) complexes with mixed ligands including [(2- oxime-4-hydrazone) pentane (L₁H) and 2-chlorobenzaldehyde thiosemicarbazone(T₁H) ,or 3,4-dimethoxy acetophenone thiosemicarbazone (T₂H); glycine (GH) or metformin (mf)] have been prepared in both pH (6.5-7) and (9.5-10) using classical and microwave techniques. The resulting complexes have been characterized using physio- chemical and spectral techniques. The study suggested that the complexes have the generalformulate [Co(L₁H)(TH)(BH)](CH₃COO)₂and[Co(L₁)(TH)(G)]or[Co(L₁)(T)(mf)] at pH (6.5-7) and (9.5- 10), respectively {where TH= T₁H or T₂H; T= deprotonated T₁H or T₂H; L₁H=L₁=deprotenated; BH= GH or mf; G= deprotonated GH]. Hexacoordinated mononuclear complexes having distorted octahedral geometries have been investigated. The biologicall activity of the ligands and complexes have been evaluated by agar plate diffusion technique against Echerichia coli, Klipsila pnnemoia, Staphylococcus aureus and Pseudomonas aeruginosa. Some compounds have been found to have antibacterial activity. 

Most GPS receivers calculate their locations by a geodetic coordinate referenced to the WGS84 ellipsoid, whereas the local reference applied in IRAQ (referred as ClarkelSSO ellipsoid) have different geodetic coordinates.
This paper presents the results of particulars conversion between geographical and UTM grid coordinates system from WGS84 reference ellipsoid system to ClarkelSSO reference ellipsoid system for a selective locations in Mosul (Zone 38N). Conversion formulae and parameters are also given to facilitate users to convert the coordinates of any point in the study area between the two systems by using GPS.receiver and ArcGIS software.
The result shows that the geographical and UTM grid systems of the two systems are slightly different, but additive constants are sufficient to attain the general accuracy.

ABSTRACT
The research tackled the classical problem in artificial intelligence as 8-puzzle problem with genetic algorithm. The research present the fundamental of genetic algorithm with sliding tile 8-puzzle problem. Starting from current state for state space search into a goal state by depending on the tile’s move (tiles out of place) in the current and compare with the solution of the problem (goal), without blank’s move. population size chose by the summation of probabilities misplaced tile’s move (tiles out of place) in current state comparing with goal state. In this research, depended on the Crossover and mutation for ordered chromosomes method. The experimental in this research show that the algorithm is efficient. The source code is written in Matlab language.

Abstract
The present investigation was conducted to reveal the effect of oral administration of diazepam (2.5-5 mg/kg B.W.) orally daily for 6 weeks on sperm concentration, the level of live sperm, dead and abnormal sperm and the relative weight of testis, prostate, seminal vesicles and epidydimus (head, body, tail). Furthermore measurement of testosterone hormone level in time interval (0,3,6 weeks) in adult albino male rats with age between 2.5-3 months and average body weight (222±16.79gram). The results showed that diazepam at doses (2.5-5 mg/kg) body weight caused a significant decreas in sperms count and the percentage of live sperms with a significant increased in the percentage of dead sperms and morphologically abnormal sperms.
Furthermore a significant decreas in serum testosterone, average weight of testis, prostate glands and tail of epididymis associated with significant increased in average body weight during period 2,4,5,6, weeks in rats treated with diazepam at two doses 2.5,5 mg/kg of body weight compared with control group. It is concluded from the present study is that diazepam has adverse effect on sexual efficiency in adult male.

Bone marrow depression is the mo:.it serious dose limiting toxicity of hydroxy urea . Natural apple cider vinegar in supposed to have both chemo-proteotive and myelo -stimulatory effects .
In this study , hydroxy urea at a dose of 80mg/kg/day orally produced significant depression of red blood cell, adecrease in white
blood cells and platelets in mice . 20mg/kg/day of apple cider vinegar seven days after hydroxy urea was administered produced no improvement in red blood cells and white blood cells and platelets counts.
The administration of apple cider vinegar with hydroxy urea produced significant (P<0.05) increase in red blood cells and white blood cells while platelets not recovered to normal .
The effect of hydroxy urea in mice on protein was observed as depressant effect significantly (P<0,05) on total protein adecrease in albumin and globulin .
The administration of apple cider vinegar seven days after hydroxy urea produced no significant effect on globulin and albumin , yet the total protein increased but not significantly .
The administration of apple cider vinegar at the same time with hydroxy urea significantly increase total protein and globulin , while no change on albumin level .
The results in this study indicate that apple cider vinegar has a protective effect on bone marrow from depressive effect of cyto toxic drug hydroxyurea .

ABSTRACT
The Hosoya polynomials of Steiner 3-distance of hypercube graphs , and of the square of a path, , are obtained in this paper. The Steiner n-diameters of and are also obtained.

The study was conducted in order to create the best conditions (physical and chemical factors) that necessary for the growth of the Bacillus subtilis and its production of the Xylanase enzyme.
The results include isolation and diagnosis of (40) isolates of bacteria: Bacillus subtilis obtained from (30) soil samples and study the effect of some physical factors (period and temperature of incubation, pH of the medium, ventilation) on bacterial growth and its production of an Xylanase enzyme. The results showed that best growth and its production of the enzyme was obtained when the incubation is (48) hours and the temperature (30) C^o , pH of the medium (7) and incubation with shaking at (200) rpm where the optical density value of bacterial growth was reached (0.25) and activity of the enzyme product was (3.41) unit / ml. The effect of some chemical agents (carbon and nitrogen source for medium) on bacterial growth and its production of an Xylanase enzyme and the results revealed that the carbon source (Xylan) gave the best growth and production of the enzyme compared with other of carbon sources (Starch, Cellulose, Xylose, Glucose, Sucrose, Maltose, Lactose), where the optical density value of growth was (0.25) and the enzyme activity (3.41) unit / ml. Regarding the effect of the nitrogen source (organic and inorganic) in medium on growth and production of the enzyme, the results showed that the best bacterial growth and the production of an Xylanase enzyme occur when organic nitrogen sources (Peptone, Beef extract, Yeast extract, Casien) were supplemented in the medium compared with inorganic nitrogen sources (KNO₃, (NH₄) ₂SO₄, NH₄NO₃, NaNO₃). Peptone and Yeast extract were the best nitrogen sources for stimulation of bacterial growth and the production of the enzyme with optical density value of growth reached (0.29 , 0.286) and the enzyme activity was (3.92 , 3.9) unit / ml.

Abstract
The objective of this paper is to develop a parallel Pole numerical integration method suitable for renaming in MIMD computing systems.
In this paper we improve the Pole Method for numerical integration by partitioning and parallel processing .we compared the developed methods with initial methods the comparison showed the supervise the developed Method for the initial method.
The developed methods are suitable fof running on MIMD computing systems.

ABSTRACT

The biological study was conducted at the University of Mosul, College of Education, Department of Biology. To aims at identifying effects of environmental pollution in the seven sites at Nineveh (Al-Rahmanyah,Al-Rashidiyah, Yarmejah, Hamam Al-Alil, Al-Nimrud, Al-Qayarah and Sinjar) in concentrations of heavy accumulated metals,(Pb,Cd,Ni,Co) in the parts that are eaten from leguminosae plants.
The study results showed that pods of leguminosae plants in different sites contained heavy metals with different concentrations within the normal levels of toxicity: cobalt (0.53-1.36), nickel(0.1-5), cadmium (5-30), lead (30-300)ppm. the concentration of cadmium was over than (0.1)ppm., which applied by (WHO).

Abstract
A new complexes of some transition metal ions (Co(II),Ni(II),Cu(II)) and non transition metal ions (Zn(II),Cd(II)) with a number of Schiff bases obtained from the condensation of some amino acids valine and serine with (Indol-3-carboxy aldehyde) have been prepared. All the prepared complexes have been characterized by elemental analysis(M), molar conductance, magnetic susceptibility infrared and electronic spectral. The complexes were classified as:
A- mononuclear complexes.
1- Complexes with the formulas [ML(CH3COO) (H2O)2].
2- Complexes with the formulas [ML(CH3COO)] H2O.
B- Di nuclear complexes.
Complexes with the formulas [M2(L)2(CH3COO)2] .2H2O.
M= Co(II),Ni(II),Cu(II),Zn(II)Cd(II).
L= Indol-3-carboxy aldehyde valine imine, Indol-3-carboxy aldehyde serine imine
The physical measurements showed that the prepared complexes may have a tetra coordinated (tetrahedral or square planer) and hexa-coordinated (octahedral) structure and that all the prepared complexes were non electrolyte.

Abstract
This paper aims to design a database and protecting it using Oracle Language and MD5 algorithm for encryption for the Oil Products Distribution Company (OPDC) in Mosul. The study assumes “the possibility of establishing a scientific, applicable and secure database and protect it, in light of the OPDC data, organizational structure and information those internally certified.
Three detectives on work: Oracle databases and Oracle language for structural and management of the data; the protection and the mechanism of action of secure cryptographic algorithm; the stages of the building for OPDC. The study reached conclusive results, the most important is that it could build databases and protect it. It has been tested and proven a successful operation in the demo application.