Comparison of different dietary sources of n-3 polyunsaturated fatty acids on immune response in broiler chickens

The study aims to research the effects of varied dietary sources of n-3 polyunsaturated fatty acids (PUFA) on the immune response in broiler chickens with stress on natural killer (NK) cell activity. Diets supplemented with one of the four sources of n-3 PUFA: linseed oil-, echium oil-, fish oil (FO) or algal biomass-enriched diets at levels of 18, 18, 50 and 15 g/kg fresh weight, were provided for one-d-old male Ross 308 broilers, totaling 340 in number, until they were slaughtered. The analyses included total lipid profile using gas chromatography (GC) for plasma, spleen, thymus, and blood. Additionally, NK cell activity and cell proliferation were investigated for thymocytes and splenocytes. The results indicated that the source of n-3 PUFA had a strong influence on fatty acid composition across all tissues. NK activity was highest in splenocytes and PBMCs from broilers fed linseed oil, followed by those fed algal biomass or echium oil, and lowest for those from broilers fed FO. The proliferative response of lymphocytes from algal biomass-fed chickens tended to be the highest, followed by those fed linseed oil in most cases. Lymphocytes from chickens fed fish oil showed the lowest proliferative response. These results could mean that a docosahexaenoic acid (DHA)-rich algal product might enrich chicken meat with n-3 PUFA without significant damaging effects on chicken immunity

Using a Proposed Program Based on Johannes Itten’s Theory of Color in the Development of Color Culture among Faculty of Early-Childhood Education Students

The current study was prepared on the basis that color is one of the most important visual elements of the creativity of the artistic work due to its role in highlighting aesthetic and expressive values with the diversity of its color relations as well as its ability to show ideas and to increase attention, in addition to the use of color to show form and to increase motivation for learning. This study aimed to investigate the effectiveness of a proposed program based on Johannes Itten’s theory of color to teach color to the students of the Faculty of Early Childhood Education in the development of their color culture. The material and instruments of the study included a proposed program based only on watercolors, in addition to a performance scale for color culture. The sample of the study consisted of (30) students of the third year at the Faculty of Early Childhood Education. The study findings showed that there are statistically significant differences between the mean scores obtained by the study participants on the pre and post administrations of the performance scale of color culture in favor of the post-administration. Thus, the present study proved the effectiveness of the proposed program in the development of the color culture among the student-teacher at the Faculty of Early Childhood Education

New double stage ranked set sampling for estimating the population mean

In environmental and many other areas, the main focus of survey is to measureelements using an efficient and cost-effective sampling technique. One way to reach that isby using Ranked set sampling (RSS). RSS is an alternative sampling technique that canimprove the efficiency of estimators when measuring the variable of interest is eithercostly or time-consuming but ranking its elements in a small set is easy. The purpose of thisarticle is to introduce a new modification of RSS to estimate the mean of the targetpopulation. This proposed technique is a double-stage approach that combines median RSS(MRSS) and MiniMax RSS (MMRSS). The performance of the empirical mean and varianceestimators based on the proposed technique are compared with their counterparts inMMRSS, RSS and simple random sampling (SRS) via Monte Carlo simulation. Simulationresults revealed that this new modification is always more efficient than their counterpartsusing MMRSS and SRS, while it is more efficient than RSS is many cases especially when thedistribution is asymmetric

New double stage ranked set sampling for estimating the population mean

In environmental and many other areas, the main focus of survey is to measureelements using an efficient and cost-effective sampling technique. One way to reach that isby using Ranked set sampling (RSS). RSS is an alternative sampling technique that canimprove the efficiency of estimators when measuring the variable of interest is eithercostly or time-consuming but ranking its elements in a small set is easy. The purpose of thisarticle is to introduce a new modification of RSS to estimate the mean of the targetpopulation. This proposed technique is a double-stage approach that combines median RSS(MRSS) and MiniMax RSS (MMRSS). The performance of the empirical mean and varianceestimators based on the proposed technique are compared with their counterparts inMMRSS, RSS and simple random sampling (SRS) via Monte Carlo simulation. Simulationresults revealed that this new modification is always more efficient than their counterpartsusing MMRSS and SRS, while it is more efficient than RSS is many cases especially when thedistribution is asymmetric

Dental Anxiety and Fear among Patients in Jazan, Kingdom of Saudi Arabia: A Cross-sectional Study

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Singular Short Range Potentials in the J-Matrix Approach

We use the tools of the J-matrix method to evaluate the S-matrix and then deduce the bound and resonance states energies for singular screened Coulomb potentials, both analytic and piecewise differentiable. The J-matrix approach allows us to absorb the 1/r singularity of the potential in the reference Hamiltonian, which is then handled analytically. The calculation is performed using an infinite square integrable basis that supports a tridiagonal matrix representation for the reference Hamiltonian. The remaining part of the potential, which is bound and regular everywhere, is treated by an efficient numerical scheme in a suitable basis using Gauss quadrature approximation. To exhibit the power of our approach we have considered the most delicate region close to the bound-unbound transition and compared our results favorably with available numerical data.Comment: 14 pages, 5 tables, 2 figure

Systematic Evaluation for the Impact of the Geological Conditions on the Adsorption Affinities of Calcite as an Adsorbent of Zn2+ Ions from Aqueous Solutions: Experimental and Theoretical Studies

Three samples of calcite (calcite crystal (CA), calcite of limestone (L.CA), and metamorphosed calcite (marble) (M.CA)) were assessed as adsorbents of Zn (II) to consider the impact of the different geological conditions. The three samples exhibit remarkable changes in their Zn (II) retention capacities (Qsat = 384.6 mg/g (CA), 274.5 mg/g (L.CA), and 512.6 mg/g (M.CA)). The retention systems of the three calcite samples were described on the basis of the suggested statistical physics-based equilibrium studies as well as the traditional kinetic and isotherm models. However, the M.CA samples exhibited the best retention capacity, the steric properties reflecting a higher active site density of CA (Nm (Zn) = 113.46 mg/g) than both M.CA (Nm (Zn) = 82.8 mg/g) and L.CA (Nm (Zn) = 52.4 mg/g) at 323 K. This was assigned to the controlling effect of the sequestered numbers of Zn (II) per site on the surfaces of the calcite phase (n(Zn) = 3.39 (CA), 5.24 (L.CA), and 6.19 (M.CA)) in addition to the higher surface area and ion exchange of the metamorphosed and deformed M.CA. The previous n(Zn) values suggested the retention of Zn (II) by a multi-ionic mechanism in a vertical orientation. The Gaussian energies (8 to 16 KJ/mol) and retention energies (˂40 KJ/mol) of Zn (II) by CA and L.CA suggested complex physical and weak chemical mechanisms involving ion exchange, hydrogen bonding, dipole bonding forces, electrostatic attractions, and van der Waals forces. The thermodynamic properties were illustrated on the basis of the internal energy, free enthalpy, and entropy functions, which validate the endothermic and spontaneous nature of the Zn (II) retention system by the three calcite samples

Bond-graph Input-State-Output Port-Hamiltonian formulation of memristive networks for emulation of Josephson junction circuits

A bond graph Input-State-Output Port-Hamiltonian formulation of memristive networks for Josephson junction circuits in state space is presented. The methodology has applications to the modeling of SQUIDs and other non-linear transducers and enables the formulation of input-output models of complex components embedded in non-linear networks

درجة الرضا الوظيفي لمعلمي التعليم الأساسي في محافظة جنوب الشرقية في سلطنة عُمان = Job satisfaction among primary school teachers in South Sharqiyah, Sultanate of Oman

The purpose of this research is to identify the level of job satisfaction of primary school teachers in South Sharqiyah, Sultanate of Oman. The research used the descriptive research method to answer the research questions. The population of the research consisted of all school primary teachers in South Sharqiyah, Sultanate of Oman, and a sample included (370) male and female teachers was selected to answer a valid and reliable questionnaire. The descriptive and inferential statistics were used to analyze the collected data. The analyses showed that the level of job satisfaction was moderate, with Mean score (3.12). The findings also showed that there were statistically significant differences in the means scores for four dimensions of job satisfaction by gender, p 0.05. The research recommends to involve teachers in decision making process, and treat them in more clear and transparent methods, mainly teachers with high academic qualifications. Moreover, it recommends to motivate male teachers to participate in more educational works and competitions, and award teachers their promotions. Further quantitative and qualitative researches are recommended to get more in-depth information on job satisfaction. هدف البحث إلى الععرف لل درجة الرضا الوظيفي لمعلمي الععليم الأساسي في محافظة جنوب الشرقية في سلطنة لمان. اسعخدم البحث المنهج الوصفي العحليلي؛ وتألف مجعمع البحث من جميع معلمي ومعلمات الععليم الأساسي في جنوب الشرقية، و اشعملت لينة البحث لل ( )370معلما ومعلمة. ولعحقيق هدف البحث، تم تطوير اسعبانة والعأكد من صدقها وثباتها؛ وتم اسعخدام العحليل الإحصائي الوصفي والاسعدلالي. توصلت نعائج العحليل الإحصائي إلى أن الرضا الوظيفي للمعلمين جاء بدرجة معوسطة، حيث بلغ المعوسط الحسابي (.)3.12 كما أظهرت النعائج وجود فروق ذات دلالة إحصائية ( )a < 0.05في مسعويات جميع محاور الرضا الوظيفي تعزى لمعغير النوع الاجعمالي، ما لدا محوري ظروف العمل والعلاقة مع الزملاء، تعود لصالح الإناث بمعوسطات حسابية تتراوح بين ( ، )3.97-3.21في حين لا توجد فروق ذات دلالة إحصائية لمعغير سنوات الخبرة. وأوص البحث العمل لل تمكين المعلمين من خلال إشراكهم في لملية صنع القرارات، والععامل معهم بكل شفافية ووضوح ، وخاصة ذوي الشهادات العليا، وتحفيز مدارس الذكور للمشاركة والمثابرة في العمل التربوي والمسابقات التربوية المخعلفة، ومنح المعلمين حقوقهم في الترقيات، و لمل أبحاث من النوع الكيفي باسعخدام المقابلات مع المعلمين والمعلمات وصناع القرار في وزارة التربية والععليم للحصول لل بيانات أكثر لمقا في ما يععلق بالرضا الوظيف

Stability of vitamin C in broccoli at different storage conditions

In this study, the retention of vitamin C in fresh broccoli stored at different temperatures (i.e. chiller, room, cooking, and roasting or baking; 5-120°C) was investigated. The thermal stability of vitamin C in broccoli was analysed at 5, 20, 45, 60, 70, 80, 110, and 120°C. The vitamin C content was measured by the indophenol titration method. Vitamin C was affected negatively at all stored temperatures. The degradation of vitamin C was modelled by first-order reaction kinetics and the reaction rate constants were observed as 9.03×10-8 and 5.65×10-3 s-1 when stored at 5°C and 120°C, respectively. The activation energy was estimated as 74.2 kJ/mol within the temperature range used in this study. The lowest decay of vitamin C was observed during the chilling condition. The data on retention of vitamin C in broccoli could be used to determine their stability, when stored as raw, and when heated at different temperatures