This study aimed to incorporate hydroxyapatite nanoparticles (nHA) or amorphous calcium phosphate nanoparticles (nACP) into a self-etch primer (SEP) to develop a simplified orthodontic bonding system with remineralizing and enamel preserving properties.

The aim of this study is to provide an overview of various models to study drug diffusion for a sustained period into and within the human body. Emphasized the mathematical compartment models using fractional derivative (Caputo model) approach to investigate the change in sustained drug concentration in different compartments of the human body system through the oral route or the intravenous route. Law of mass action, first-order kinetics, and Fick's perfusion principle were used to develop mathematical compartment models representing sustained drug diffusion throughout the human body. To adequately predict the sustained drug diffusion into various compartments of the human body, consider fractional derivative (Caputo model) to investiga

The past few years have seen the development of the quantity and quality in the field of software, as it has become the word of electronic games of common terms used in the modern era.

And the effects of this software it is working on a low ability to exercise social activities and the ability to perform the duties and turn away from physical exercise level and lead to the neglect of the child to develop friendships and social relations as a result of his over-zealous in use for a long time .olhz a stated research to achieve Ahavh which are:

- Learn about social isolation among children Riyadh.

- Identify statistically sig

The research aims to measure short-term memory capacity for the kindergarten children, the researcher has prepared measure short-term memory capacity test for (4-6  years) Consists of two parts, Auditory memory, consisting of (4) items And visual memory, consisting of (5) items. Selected sample (340) children from for the kindergarten children.

     To verify the skills validity adopted the skills, Researcher used indicators which are logical  validity , Through the items  experts' examining logically. and construction validity through som of the indicators which are the discriminatory power of the items.    In order to prospect the constancy the research

When the enrollment of children in Riyadh, facing many of the psychological problems that appear in their daily lives through their behavior and their actions with their peers and their teachers in kindergarten, often result in psychological problems from which they suffer to do things socially unacceptable impact on their relationship with interactive with others, Vchksah child depends on the quality of Education and the treatment they received from all of the family as an incubator, his first, and kindergarten as an environment second to raise him without that overlook about his relationship with his comrades grade and the combination of these factors is one of the most important reasons promising in effect on the child's condi

الاستثمار الاجنبي المباشر في العراق ودوره في تحقيق التنمية الاقتصادية

Background: Anti-oxidants are used as supplements to counteract the over production of free radicals in periodontal disease.Co-Q10 functions as an intercellular antioxidant by acting as a primary scavenger of free radicals (FRs) and reactive oxygen species (ROS), this study aimed to evaluate the effect of intra pocket application of perio Q gel (coenzyme Q10) alone and as adjunct to scaling and root planing on the periodontal clinical parameters in the treatment of patients with chronic periodontitis and compare the better improvement on the clinical periodontal parameters among different treatment modalities at 3 and 6 weeks. Materials and methods: A total of 323 sites with pocket depth (5-8) mm in patients with chronic periodontitis were