Naif Arab University for Security science

Riyadh, Saudi Arabia

Naif Arab University for Security science

Riyadh, Saudi Arabia
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Bakdash A.,Naif Arab University for Security science
Asian Pacific Journal of Cancer Prevention | Year: 2017

Shammah is a preparation of smokeless tobacco (ST) that is frequently used in the Arabian Peninsula, especially in Saudi Arabia. A mixture of powdered tobacco, lime, ash, black pepper, oils and flavorings, shammah in is placed in the buccal cavity or lower labial vestibule of the mouth. The user (or dipper) spits out insoluble debris. ST is linked to a number of harmful effects such as dental disease, oral cancer, oesophagus cancer, and pancreas cancer. It also causes adverse reproductive effects including stillbirth, premature birth and low birth weight. The importation of ST products is prohibited in Saudi Arabia. Legislative action to combat the use of ST (moist snuff and chewing tobacco) in Saudi Arabia appeared in 1990. The actual percentage use may be higher than reported since shammah is illegal in Saudi Arabia and there may be some unwillingness to admit to its use. Data on ST use in the Arabian Peninsula are sparse. Most studies conducted there focused on the prevalence of shammah use among adolescents rather than among adults. This review paper aimed to understand the pattern of use of shammah and its adverse health effects. It also aimed to provide suitable epidemiological data for public health policy makers.

Mohammad R.M.,University of Huddersfield | Abumansour H.Y.,Naif Arab University for Security science
2017 8th International Conference on Information and Communication Systems, ICICS 2017 | Year: 2017

The development and the advances of the World Wide Web from its first inception resulted in numerous diverse amounts of data and webpages on the web which motivates to greater demand for managing this data in an effective manner. Therefore, novel tools and techniques are required to effectively manage these data. Such tools are assumed to support interoperability and warehousing between the multiple data sources and extracting information from the different trusted databases on the web. Subsequently, the web is evolving into what is now called the Semantic Web aims to alleviate users from the burden of integrating different information sources as well as to perform searches. However, one needs to examine the trust issue of the searching results from any Semantic Web application. This paper investigates trust policies and mechanisms in semantic web applications and introduces an intermediary step to classify the relevant web services via intelligent model based on NN. © 2017 IEEE.

Alsaudi Ali M.,Naif Arab University for Security science | Motawa D.,Naif Arab University for Security science | Al-Harby F.,Naif Arab University for Security science
Advances in Intelligent Systems and Computing | Year: 2018

Concerns about security on the Internet of Things (IoT) cover data privacy and integrity, access control and availability. IoT abuse in distributed denial of service (DDoS) attacks is a major issue, as the limited computing, communications, and power resources of typical IoT devices are prioritised in implementing functionality rather than security features. Incidents involving attacks have been reported, but without clear characterisation and evaluation of threats and impacts. The main purpose of this work is to mitigate DDoS attacks against the IoT, by studying new technologies and identifying possible vulnerabilities and potential malicious uses, and building protections against them. The simulation results show that the proposed scheme is effective in mitigating DDoS attacks on IoT. © Springer International Publishing AG 2018.

Sarhan A.A.,Naif Arab University for Security science | Farhan S.A.,Naif Arab University for Security science | Al-Harby F.M.,Naif Arab University for Security science
Advances in Intelligent Systems and Computing | Year: 2018

The Internet has become very important today and a large part of everyday life, so it is vital to focus on security for web applications and mobile services, so as to protect electronic commerce, electronic government, social media and all electronic services that transfer information through it. News reports of attacks on services are frequent. Hackers use vulnerabilities in software or hardware to destroy services, and one of the common vulnerabilities is SQL injection. This vulnerability comes down to poor coding practices of junior programmers writing SQL dynamics at the back end. This paper creates a case study that considers two scenarios using ASP.NET 2015 and SQL Server 2014. In the first scenario, we check whether SQL injection exists or not, then make an SQL injection from the front end and add it to the SQL statement that exists at the back end. Then we hack the website. In the second scenario, we attempt to create a solution to protect this website. The research paper confirms that SQL injection already exists in ASP.NET 2015 (web form) and SQL Server 2014. © Springer International Publishing AG 2018.

Ahmed H.A.M.,Naif Arab University for Security science
Asian Journal of Chemistry | Year: 2017

Zinc phosphide is utilized to control rats, mice, voles, ground squirrels, prairie canines, nutria, muskrats, wild rabbits and gophers. The aim of this study is to decide the kind of toxic substance uniquely zinc phosphide and to survey particular metal aggregation in different organs of the two bovines and measure the concentration of metals including Zn, Cd, Cu, Pb, which more often than not initiates a neurotic issue in the life forms. Analysis of tests by atomic absorption spectrometry (AAS) demonstrated high centralizations of Zn in liver, substance of stomach, lung and heart of both animals. Cd and Pb have abnormal states in a descending order (liver, substance of stomach, lung and heart). High level of zinc meddles with copper retention from the digestive system, bringing about copper inadequacy and in the long run in cardiovascular infections. In conclusion, the utilization of zinc phosphide may bring about critical harming cases, either unintentional in non-target species or here and there purposeful. © 2017, Chemical Publishing Co. All rights reserved.

PubMed | Naif Arab University for Security science and University of Pretoria
Type: Journal Article | Journal: Biomedical chromatography : BMC | Year: 2016

Cases of poisoning by p-phenylenediamine (PPD) are detected sporadically. Recently an article on the development and validation of an LC-MS/MS method for the detection of PPD and its metabolites, N-acetyl-p-phenylenediamine (MAPPD) and N,N-diacetyl-p-phenylenediamine (DAPPD) in blood was published. In the current study this method for detection of these compounds was validated and applied to urine samples. The analytes were extracted from urine samples with methylene chloride and ammonium hydroxide as alkaline medium. Detection was performed by LC-MS/MS using electrospray positive ionization under multiple reaction-monitoring mode. Calibration curves were linear in the range 5-2000ng/mL for all analytes. Intra- and inter-assay imprecisions were within 1.58-9.52 and 5.43-9.45%, respectively, for PPD, MAPPD and DAPPD. Inter-assay accuracies were within -7.43 and 7.36 for all compounds. The lower limit of quantification was 5ng/mL for all analytes. The method, which complies with the validation criteria, was successfully applied to the analysis of PPD, MAPPD and DAPPD in human urine samples collected from clinical and postmortem cases.

Hussein A.S.,Naif Arab University for Security science | Hussein A.S.,Research Institute of Nuclear Power Plants
Radioprotection | Year: 2014

Radon (222Rn) is a radioactive gas that occurs naturally when uranium in soil and rock breaks down. Long-term exposure to 222Rn increases the risk of lung cancer. The principal objective of this work was to determine the 222Rn activity concentration in an indoor air environment at the El-Dabaa site proposed for a nuclear power plant project in Egypt using the track etch technique with LR115 detectors. The annual average indoor 222Rn activity concentration in apartment buildings varies from 24 to 77 Bq.m-3, with a mean value of 54 Bq.m-3. The annual effective dose received by residents of the studied area was estimated to be 0.41 mSv. The annual estimated effective dose is less than the recommended action level by ICRP (3-10 mSv.y-1). The results from this work provide a radiological assessment program and update the background of the natural radioactivity map at the El-Dabaa site. © EDP Sciences, 2014.

Refaat A.M.,Naif Arab University for Security science
Egyptian Journal of Medical Human Genetics | Year: 2016

Background: Azoospermia constitutes 20% of male infertility situations and affects 1% of the total male population (Jarvi et al., 2010). This condition is classified into three major types; pre-testicular, testicular and post-testicular Azoospermia (Sermondade et al., 2012). Genetic defects causing Azoospermia are due to chromosomal or non-chromosomal alterations on the Y-Chromosome (Lee et al., 2011). Initial diagnosis of Azoospermia is established when no spermatozoa are detected on microscopic examination of semen (World Health Organisation, 1999). Objective: To evaluate the correlation of Y-STR Profiling results and the prevalence of Azoospermia, to help for early prognosis of Azoospermia before puberty. Methods: Buccal swab samples were taken from two groups of individuals (50 fertile and 50 Azoospermic patients), then DNA was isolated using QIAamp DNA Micro kit. DNA quantification was done using a Real-time PCR utilizing Quantifiler Kit. PCR was done using PowerPlex® Y PCR Amplification Kit, then amplified products were typed using a 3130 Genetic Analyzer. Results: Five haplotypes in four different Y-STR loci were found to possess significantly higher occurrence percentages in Azoospermic than in fertile Saudi individuals, which can serve as a group of pre-diagnostic markers for early prognosis of Azoospermia in Saudi population. Conclusion: There was a significant correlation of Y-STR Profiling results and the prevalence of Azoospermia condition, which supports the idea of using Y-STR Profiling in early prognosis of Azoospermia. © 2015 The Author.

Ahmed H.A.M.,Naif Arab University for Security science
Asian Journal of Pharmaceutical and Clinical Research | Year: 2015

Benzopyran (chromene) is one of the privileged medicinal pharmacophore, which appears as an important structural component in natural compounds and generated great attention because of their interesting biological activity. The derivatives of benzopyran moiety can be capable of interacting with a variety of cellular targets which leads to their wide ranging biological activities such as antitumor, antihepatotoxic, antioxidant, antiinflammatory, diuretic, anticoagulant, antispasmolytic, estrogenic, antiviral, antifungal, antimicrobial, anti-helminthic, hypothermal, vasodilatory, anti-HIV, antitubercular, herbicidal, anticonvulsant and analgesic activity. In the present study the synthesis of substituted benzopyran derivatives have been reported as one-pot reaction by reaction of 2-chlororesorcinol with malononitrile in the presence and aldehydes or ketones. The produced products were led to react with formamide to produce pyrimidochromene. Aminochromene-2-carbonitrile was converted into the corresponding imidate, which in turn converted upon treatment withhydrazine or ammonia to the corresponding amidine. The produced amidines were cyclized into the pyrimidochromene derivatives. The synthesized compounds have been characterized by TLC, Elemental analysis, IR and 1H-NMR Spectroscopy. Some of the synthesized compounds in this work were chosen and screened in vitro for their antimicrobial and anti-fungal activity against some strains of bacteria and fungi. The antibacterial and anti-fungal activities of synthesized compounds were compared with antibacterial and anti-fungal activity of the standard antibiotics Chloramphenicol and Sertaconazol. The most of the tested compounds revealed antibacterial and antifungal properties. This review is summarized to know about the different pharmacological activities of chromene nucleus with the extended knowledge about its antimicrobial and antifungal activity. © 2015, Asian Journal of Pharmaceutical and Clinical Research. All rights reserved.

PubMed | Naif Arab University for Security science
Type: Journal Article | Journal: Journal of chromatographic science | Year: 2016

The stimulating herbal drug khat (cathine, cathinone) and its analog methcathinone are common substances of abuse in most countries. A GC-MS method was developed and validated for the detection and quantification of cathine, cathinone, methcathinone and ephedrine in oral fluid specimens. The analytes and internal standard (amphetamine-d5) were extracted from 0.5 mL oral fluids by ethyl acetate, and then the dried extracts were derivatized with heptafluorobutyric anhydride at 70C for 30 min. The MS was used in selected ion monitoring mode. Ions monitored were m/z 117, 240 and 330 for cathine, m/z 77, 105 and 240 for cathinone, m/z 105, 210 and 254 for methcathinone, m/z 210, 254 and 344 for ephedrine and m/z 244 and 336 for amphetamine-d5 The calibration curves were linear (r(2)> 0.98) in the concentration range 20-2,000 ng/mL for all analytes. The intra- and inter-assay imprecisions were within (1.6-12.5%) and (1.5-9.5%), respectively, for all analytes. Intra-assay accuracies were between -5.9 and 6.7% for all analytes. The method was successfully applied to detect and quantify the target analytes from oral fluid specimens collected from Khat and methcathinone users.

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