Samarra Journal of Pure and Applied Science

In this work, benzothiazole was prepared (AD1) from the reaction of aniline substituted with potassium thiocyanate in presence of bromine. The Diazonum salt was prepared from the reaction of (AD1) with NaNO2 and HCl then reacted the mixture with para hydroxyl benzaldehyde to obtained compound (AD2), Chalcon (AD3-8) were obtained from the reaction of compound (AD2) with acetophenone substituted in presence of NaOH, the reaction of compounds (AD3-8)with cyanogondine gives the pyrimidine compounds (AD8-12).In order to show the antibacterial activity of prepared compounds, it is evaluated against two types of common bacteria (Proteus spp., Escherichia coli,). The result of biological study is compared with standard antibiotic Ciprofloxacin.

A new, sensitive, accurate and fast spectrophotometric method for determination of Diazepam DZP and Propranolol hydrochloride PRO drugs was developed. The method based on the calculation of the difference in absorbance at dual wavelengths. The linearity of the method was between 5-45 μg/ml for the DZP drug and 5-20 μg/ml for the PRO drug. The optioned recovery percentage Rec was (323925;:-97.5947)% for DZP and (99.3272-101.0398)% for PRO. The relative standard deviation RSD % (0.2928-0.0587)% for DZP and (0.1617-1.0830)% PRO. LOD was 0.0439 μg/ml for DZP and 0.1624 μg/ml for PRO. The LOQ was 0.1463 μg/ml DZP μg/ml PRO. and molar absorptivity was 17283.718 L/mol.cm DZP and 9672.66 L/mol.cm PRO. The method was applied to the determination of DZP and PRO in Pharmaceutical

Metal oxides are widely used in adsorption technology as adsorbent surfaces because of their efficiency, low cost and unique physical properties. The aim of this review to clarify the role of aluminium oxide and Nano aluminium oxide in removing some chemicals contain that influence on human health such as dyes, antibiotics, and heavy metals. This paper also includes the affective of some adsorption parameters like pH, contact time, removal percentageand temperature. The Adsorption nature, kinetic adsorption models and isotherm models are also reported here.

The current study was carried out to examine the effect of acyclovir on liver and kidney functions of local rabbits. The indicators studied included AST, ALT, ALP, Urea, Uric acid, Creatinine. The experiment was designed with two groups (6 rabbits in group), the first is control group (C) and second group is (G) that was treated with acyclovir drug. Results showed a significant increase in the level of liver enzymes activity (AST, ALT, ALP) in G group compared with control group. Also, a significant increase in the level of Uric acid in G group compared with control group, but no significant differences in the levels of Urea and Creatinine between group (G) and control group.

A radioactive fluid waste polluted with cesium-137 from Al-Tuwaitha site -south of Baghdad-Iraq is used in this paper. Commercial zeolite is used as a sorbent material in the present work for the removal of radioactive cesium-137. The removal efficiency for radioactive liquid was 96.43 % with 2 h mixing time, 0.04 g sorbent mass and pH=6.8 and at room temperature. The Freundlich and Langmuir isotherm models were found to represent the experimental results well and these results are more consistent with Freundlich model than Langmuir model.

In this paper, a theoretical investigation of negative optoelectronic feedback study in Nano quantum cascade lasers is presented. The present rate equation model has been modified to include the nano laser factors such as the Purcell factor and the spontaneous emission factor. The results indicate that the present rate equation model can be using to study the effect of Purcell factor and the spontaneous emission factor on the negative optoelectronic feedback in Nano quantum cascade lasers. It is found that the increase in Purcell factor value leads to increase in photon number and decrease the carrier number in all quantum states. Also, the dynamic of photon number (S) tends to stable at constant value with the increase of Purcell effect i.e. there is small variation in photon number and carrier number( , , ). The decreases in enhanced spontaneous emission factor value leads to increases in carrier number and decreases the photon number and we note small variation in these values.

Lane-Emden equations are singular initial value problems and they are important in mathematical physics and astrophysics. The aim of this present paper is presenting a new numerical method for finding approximate solution to Lane-Emden type equations arising in astrophysics based on modified Hermite operational matrix of integration. The proposed technique is based on taking the truncated modified Hermite series of the solution function in the Lane-Emden equation and then transferred into a matrix equation together with the given conditions. The obtained result is system of linear algebraic equation using collection points. The suggested algorithm is applied on some relevant physical problems as Lane-Emden type equations.

The purpose of this paper is to introduce interesting modified Chebyshev orthogonal polynomial. Then, their new operational matrices of derivative and integration or modified Chebyshev polynomials of the first kind are introduced with explicit formulas. A direct computational method for solving a special class of optimal control problem, named, the quadratic optimal control problem is proposed using the obtained operational matrices. More precisely, this method is based on a state parameterization scheme, which gives an accurate approximation of the exact solution by utilizing a small number of unknown coefficients with the aid of modified Chebyshev polynomials. In addition, the constraint is reduced to some algebraic equations and the original optimal control problem reduces to optimization technique, which can be solved easily, and the approximate value of the performance index is calculated. Moreover, special attention is presented to discuss the convergence analysis and an upper bound of the error for the presented approximate solution is derived. Finally, some important illustrative examples of obtained results are shown and proved that powerful method in a simple way to get an optimal control of the considered.

Gypsum deposits are wide spread in Zurbatiyah area, Eastern of Iraq, especially in Fatha Formation. Gypsum deposits have been known as a suitable materials for gypsum plaster industry. Sawdust and Palm fibers powders have been added in different ratios to gypsum plaster material mixture to improve their industrial properties. Addition of 0 %,1 %, 5%, 10% and 15 % pass of 4.75 mm size of sawdust and palm fibers powder and 0 %, 1 %, 5%, 10% and 15 % pass of 5.60 mm size of sawdust and palm fibers powder to gypsum plaster material mixture. This ratios showed results of consistency (35-75 ml/gm), setting time (11-20 min) and compressive strength (2.2-4.4 N/mm2) for sawdust powders size 4.75 mm, whereas the results of consistency (35-63 ml/gm),setting time (11-21 min) and compressive strength (2.0-4.2 N/mm2) for palm fibers powders size pass of 4.75 mm. The addition of 1% and 5% pass of 4.75 mm sawdust and palm fibers powder to gypsum plaster material mixture showed an improvements in consistency(37-41ml/gm), (36-40ml/gm) setting time (13-14 min), (12-13 min) and compressive strength (4.2-4.4 N/mm2), and (4.1-4.2 N/mm2) for sawdust and palm fibers respectively. Also the addition of 1 % and 5 % pass of 5.60 mm sawdust and palm fibers powder showed consistency (40-45 ml/gm), (39-44 ml/gm), (14-15 min.), (12-13min.), (3.5-4.2 N/mm2), and (3.0-4.1 N/mm2), for sawdust and palm fibers respectively. In general, the results of current study conform the requirements of the Iraqi standard specification No. 28 (1988) and ASTM C28, C472 (2010) for ordinary gypsum plaster industry.

The study aimed to evaluate the level of microalbumin and cyststin C and its relation to kidney damage caused by diabetes . This study was completed from the beginning of August 2019 to the end of January 2020. Blood and urine samples were collected from 40 people with diabetes male and female patients from Samarra general hospital and some outpatient clinics in the city ranged in age (26-70) and 20 healthy people of similar ages and considered a control group, the level of microalbumin was measured in urine and The results showed a rise in morale at the level (P< 0.01) in the concentration of microalbumin in urine and cyststin C in serum in people with diabetes compared to the control group, as well as the results showed a higher level of microalbumin in men while the level of microalbumin decreased microalbumin in women, while the level of cyststin C was noted not affected by sex, while the results of the study showed a high level of microalbumin and cyststin C in different age groups. From the current study, we conclude the negative impact of diabetes on the functions and functions of the kidney, by diagnosing the rise in microalbumin levels, cyststin C, which are modern and accurate criteria for diagnosing kidney safety.

This study provides analytical results for a very simple design for an electromagnetic wave absorber with a negative refractive index. It is only a copper disk separating from ground copper by FR4. This structure is simple design and very thin. This research can be used for scientific applications such as absorption, sensors, weather satellites, solar cells and to reduce the effects of electromagnetic waves. The design was implemented and simulated by CST program. This design provides a 99% absorption band. In addition, controlling the design dimensions of the disc and the thickness of the insulating layer leads to good results in tuning the resonant frequency. On the other hand, the results of the engineering dimension control of the design showed the possibility of obtaining an absorber with a wide absorption band that can be used in applications of energy harvesting and protection from the effects of electromagnetic waves. It is also worth noting that the design can be developed to work in a wide range of frequencies such as microwave, terahertz, up to optical frequencies, which may contribute to potential applications in many areas of optical and engineering technology.