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The Effect of Zinc Oxide Nanoparticles on Streptococcus mutans of Human Saliva (In Vitro Study)

Background: Nanotechnology represents a new science that promises to provide a broad range of uses and improved technologies for biological and biomedical applications. One of the reasons behind the intense interest is that nanotechnology permits synthesis of materials that have structure is less than 100 nanometers. The present work revealed the effect of zinc oxide nanoparticles (ZnO NPs) on Streptococcus mutans of Human Saliva in comparison to de-ionized water. Materials and methods: Streptococcus mutans were isolated from saliva of forty eight volunteers of both sexes their age range between 18-22 years and then purified and diagnosed according to morphological characteristic and biochemical tests. Different concentrations of ZnO NPs were prepared from the stock solution; all the experiments were conducted in vitro. Disk diffusion method was used to study the sensitivity of Streptococcus mutans to different concentrations of zinc oxide nanoparticles in comparison to effect of de-ionized water. Results: Streptococcus mutans were sensitive to concentrations (0.05, 0.1, 0.5, 1, 3 and 5.8) mg / ml of the zinc oxide nanoparticles solution in comparison to de-ionized water, revealing a highly significant difference in all concentrations except for concentration (0.01) mg / ml which was showed no significant difference in comparison to de-ionized water. Conclusion: This study revealed that zinc oxide nanoparticles were effective against Streptococcus mutans.

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Publication Date
Sat Dec 24 2022
Journal Name
Journal Of Legal Sciences
The UAE Federal Legislator's Contemporary Criminal Policy Against Adultery Crimes: An Analytical Study

In this research, we addressed the modern criminal policy of the UAE legislator in the face of adultery, in accordance with the most recent amendments under Decree No. 31 of 2021 on crimes and penalties, in which the federal legislator adopted a modern criminal policy in an attempt to balance the protection of the public freedom of individuals, including sexual freedom, with the protection of family ties, by criminalizing the adultery of the husband or wife or those under the mandate to describe the position of the female with her consent under the text of article 409 of the aforementioned law. The male, and what confirms to us this is the adoption of the narrow concept of the position, so that the site is limited to the natural penetrat

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Publication Date
Mon Nov 01 2021
Journal Name
Proceedings Of First International Conference On Mathematical Modeling And Computational Science: Icmmcs 2020
Study the Stability for Ordinary Differential Equations Using New Techniques via Numerical Methods

Nonlinear differential equation stability is a very important feature of applied mathematics, as it has a wide variety of applications in both practical and physical life problems. The major object of the manuscript is to discuss and apply several techniques using modify the Krasovskii's method and the modify variable gradient method which are used to check the stability for some kinds of linear or nonlinear differential equations. Lyapunov function is constructed using the variable gradient method and Krasovskii’s method to estimate the stability of nonlinear systems. If the function of Lyapunov is positive, it implies that the nonlinear system is asymptotically stable. For the nonlinear systems, stability is still difficult even though

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Scopus
Publication Date
Wed Sep 09 2020
Journal Name
المجلة الأكادمية للبحوث القانونية والسياسية
Unilateral Contracts - A Comparative Study Under the American System and Iraqi Civil Law

في الوقت الذي تشترط فيه القواعد العامة في النظم القانونية المختلفة وجود طرفين في العقد يصدر من احدهما التعبير الاول عن الارادة ويسمى الايجاب، ويصدر من الآخر التعبير الثاني ويسمى القبول، برز في بدايات القرن الماضي نوع خاص من العقود في النظام الانجلوامريكي أطلق عليه (العقود احادية الجانب) اثار خلافا فقهيا كبيرا، فضلا عن صدور العديد من الاحكام القضائية المتناقضة بشأنه. من هنا جاء هذا البحث ليسلط الضوء على هذا ا

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Publication Date
Mon Sep 30 2019
Journal Name
College Of Islamic Sciences
Provisions of payment of the questioner in Islamic jurisprudence

God has honored the man with life and decent living and warned against attacking anything that violates his sanctity without a legitimate right. Our Islamic Shari'ah has the rights to preserve the right of a Muslim in the event of any harm.

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Publication Date
Mon May 21 2007
Journal Name
Journal Of Planner And Development
Role of functional relations in the identification of regions

The region is defined by the spatial dimension, which consists of a set of stabilizers (towns and villages). The concept of the territory requires conditions on the nature of functional relations and the mutual influence of the regions within the region. Any territory must be based on the interdependence and interaction between the mother city and its surrounding countryside and cities, and when the interdependence is strong and the interaction is clear, it helps to define the territory. The regions are divided on different bases. There are geographically or national homogeneous regions, and there are cultural regions that want to preserve their culture in terms of language or religion. There are administrative regions to manage

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Publication Date
Thu Aug 03 2023
Journal Name
Journal Of Legal Sciences
Preventive Measures in Light of the Spread of Epidemics

Countries may experience health crises that threaten their security and the safety of them public order, such as the spread of an epidemic, this matter gives the executive authority the right to take preventive measures to control matters, such as curfews and quarantine. ), (240) of the Iraqi Penal Code No. (111) of 1969. Lik ewise, the Ira00qi Public Health Law No. (89) of 1981 included administrative penalties for the same violations. The difficulty and confusion arises with the application of these texts, so we need legislative intervention by introducing an amendment to the existing legal rules or by developing a special independent law regulating criminal responsibility for spreading epidemics

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Publication Date
Fri Feb 08 2019
Journal Name
Journal Of The College Of Education For Women
Variation in the degree of Continentality climate of Iraq

This research paper is about thevariationin the degree of Continentality climate of the
Iraq during (40) years for a number of climate station. Using Poresof formula, it is found out
that the climate of Iraq ranges between extreme Continentality and very extreme
Continentality, and that the Continentality degree is characterized with extreme frequency
from one year to another. In certain years, the degree of climate Continentality decreases
while in other years it rises in such a way that there is no similarity in the Continental degree
from one year to another for the same station.
As for the general trend of the degree of Continentality, the last years had noticed
special variations, which are divided in to thre

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Publication Date
Fri Jan 05 2024
Journal Name
Al-academy
THE SYSTEM OF SHAPE IN SOME OF PICASSOS CERAMICS

Picasso ceramics represented illuminated sign in ceramic art and excelled in accord ceramic art dimension aesthetically, and put it in a new prospects, despite the simplicity of the forms turn into a magical images and multiple interpretations.
So the search deliberately to choose purposive (37) samples divided into four groups, as follows: -
A flat shapes / palets or saucers / the vases /modified vases .
benefiting from indicators were spawned from literature ,to analyzing samples within the totals for the identification systems act forming art work`s:-
(1)Picasso's ceramic work product of a deliberate process represented a capacity of technical experience, and formal
(2)The system configuration in the ceramic art works c

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Publication Date
Thu Jan 10 2019
Journal Name
Journal Of The College Of Education For Women
Types of parallelism in the poetry of Mahmoud Darwish

This research deals with the study of types of parallelism in contemporary Arabic poetry and took the hair Mahmoud Darwish, a model for the study has been the goal of research to clarify the term parallelism and the statement of the most important types, said evidence of that in the poetry of Mahmoud Darwish

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Publication Date
Thu Aug 01 2024
Journal Name
Journal Of King Saud University - Engineering Sciences
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