Jordan University of Science and Technology

About: Jordan University of Science and Technology is a education organization based out in Irbid, Irbid, Jordan. It is known for research contribution in the topics: Population & Medicine. The organization has 7582 authors who have published 13166 publications receiving 298158 citations. The organization is also known as: JUST.

Detecting sentiment embedded in Arabic social media – A lexicon-based approach

Abstract: Sentiment analysis aims at extracting sentiment embedded mainly in text reviews. The prevalence of semantic web technologies has encouraged users of the web to become authors as well as readers. People write on a wide range of topics. These writings embed valuable information for organizations and industries. This paper introduces a novel framework for sentiment detection in Arabic tweets. The heart of this framework is a sentiment lexicon. This lexicon was built by translating the SentiStrength English sentiment lexicon into Arabic and afterwards the lexicon was expanded using Arabic thesauri. To assess the viability of the suggested framework, the authors have collected and manually annotated a set of 4400 Arabic tweets. These tweets were classified according to their sentiment into positive or negative tweets using the proposed framework. The results reveal that lexicons are helpful for sentiment detection. The overall results are encouraging and open venues for future research.

Cytotoxicity evaluation of various resin based root canal sealers.

Abstract: Al-Hiyasat AS, Tayyar M, Darmani H. Cytotoxicity evalu-ation of various resin based root canal sealers. InternationalEndodontic Journal, 43, 148–153, 2010. Aim To investigate the cytotoxic effects of four resin-based root canal sealers, namely, AHPlus, an epoxyresin; EndoREZ, a single-methacrylate-based sealer;Epiphany, a multi-methacrylate resin-based sealer;and Metaseal, one of the latest generation methacrylate4-META–containing resin-based sealers.Methodology The materials were mixed accordingto the manufacturer’s instructions, and elutes of thematerials were prepared by incubating 1 g of theendodontic sealers in sterile phosphate-buffered salinefor 1 week at 37 C. The elutes were incubated withBalb C 3T3 fibroblasts for 48 h, and cytotoxic activitywas measured using the MTT assay ([3-4,5-dimethylthiazol-2-yl]-2,5-diphenyl tetrazolium bromide succi-nate), which tests for mitochondrial enzyme activity.Results All materials were cytotoxic to differentdegrees. AHPlus was the least cytotoxic followed byEndoRez, Epiphany and Metaseal, which was the mostcytotoxic. Statistical analysis of variance (anova)showed highly significant differences between theeffects of the elutes of different materials on cellviability (P < 0.001). Follow-up comparison by Tukeytest showed that all the materials were significantlydifferent from each other (P < 0.05).Conclusion AHPlus was the most biocompatiblematerial tested because it showed low cytotoxicity,followed by EndoRez, which was moderately cyto-toxic; Epiphany, which was highly cytotoxic; andMetaseal, which was severely cytotoxic. Dilution ofthe elutes of the materials by tenfold markedlyreduced the cytotoxic effect of AHPlus, EndoRez andEpiphany but did not affect that of the elute ofMetaseal, which remained severly cytotoxic even afterdilution.Keywords: cytotoxicity, endodontic sealer, fibro-blasts, mitochondrial dehydrogenase activity.

Intestinal colonization of symptomatic and asymptomatic schoolchildren with Blastocystis hominis.

Abstract: A study of single stool specimens was done to determine the prevalence of intestinal parasites among 1,000 primary school children. A questionnaire was completed by each child9s parents. Specimens were examined by using wet-mount preparation, formaline-ether concentration, and Sheather9s flotation technique. Trichrome and acid-fast stains were done. Blastocystis hominis was observed in 203 (20.3%) of the specimens examined, and 175 specimens contained this organism in the absence of other pathogenic parasites. Older children had fewer B. hominis infections (6 to 7 years old, 50% infection rate; 8 to 9 years, 27.5%; 10 to 12 years, 9.5%). The most common complaints reported by 75 children harboring the parasite were a mild recurrent diarrhea, abdominal pain, nausea, anorexia, and fatigue. Blastocystosis is quite common among schoolchildren. Contaminated drinking water is suspected to be the source of infection.