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Abdelnasser Ibrahim,Aspalilah Alias,Faridah Mohd Nor1,Mohamed Swarhib,Siti Noorain Abu Bakar,Srijit Das,Nurliza Abdullah,Mohamad Helmee Mohamad Noor 대한해부학회 2019 Anatomy & Cell Biology Vol.52 No.2
Erratum for the article "Study of sexual dimorphism of Malaysian crania: an important step in identification of the skeletal remains" 9Anat Cell Biol. 2017 Jun;50(2):86-92. https://doi.org/10.5115/acb.2017.50.2.86)
Abdelnasser Ibrahim,Aspalilah Alias,Faridah Mohd Nor,Mohamed Swarhib,Siti Noorain Abu Bakar,Srijit Das 대한해부학회 2017 Anatomy & Cell Biology Vol.50 No.2
Sex determination is one of the main steps in the identification of human skeletal remains. It constitutes an initial step in personal identification from the skeletal remains. The aim of the present study was to provide the population-specific sex discriminating osteometric standards to aid human identification. The present study was conducted on 87 (174 sides) slices of crania using postmortem computed tomography in 45 males and 42 females, aged between 18 and 75 years. About 22 parameters of crania were measured using Osirix software 3-D Volume Rendering. Results showed that all parameters were significantly higher in males than in females except for orbital height of the left eye by independent t test (P<0.01). By discriminant analysis, the classification accuracy was 85.1%, and by regression, the classification accuracy ranged from 78.2% to 86.2%. In conclusion, cranium can be used to distinguish between males and females in the Malaysian population. The results of the present study can be used as a forensic tool for identification of unknown crania.
Abdelnasser S. S. Ibrahim,Ali A. Al-Salamah,Ahmed Mohamed El-Toni,Mohamed A. El-Tayeb,Yahya B. Elbadawi,Garabed Antranikian 한국생물공학회 2013 Biotechnology and Bioprocess Engineering Vol.18 No.6
Recently isolated Cr(VI)-reducing AmphibacillusKSUCr3 whole cells were immobilised in magnetic gels. Magnetic magnetite (Fe3O4) nanoparticles were synthesisedwith an average particle size of 47 nm and 80 electromagneticunit (emu)/g saturation magnetisation. Whole cells wereimmobilised by entrapment in agar, agarose, alginate, orgelatin in the presence or absence of Fe3O4 nanoparticlesfor the preparation of both magnetic and nonmagneticimmobilised cells. Of the gels tested, alginate was selectedas the best immobilisation matrix, and following optimisationof the entrapment process, the immobilisation yield reached92.5%. In addition to the ease of separation and reuse ofthe magnetic cell-containing alginate beads using an externalmagnet, the magnetically immobilised cells showed approximately16% higher Cr(VI) reduction activity compared withnonmagnetic immobilised cells. To improve their physicaland mechanical properties, the magnetic alginate beadswere successfully coated with a dense silica layer usingsol–gel chemistry and Ca(OH)2, an alkaline catalyst fortetraethyl orthosilicate, to avoid leaching of Ca2+ ions. Amphibacillus KSUCr3 cells immobilised in silica-coatedmagnetic alginate beads showed approximately 1.4- to 3.9-fold enhancement of thermal stability compared with freecells. Furthermore, after seven batch cycles, the Cr(VI)reduction activity of free cells decreased to 48%, whereasimmobilised cells still retained 81.1% of their originalactivity. In addition, the Cr(VI)-reduction rate of immobilisedcells was higher relative to free cells, especially at higherCr(VI) concentrations. These results supported the developmentof a novel, efficient biocatalysts for Cr(VI) detoxificationusing a combination of whole cell immobilisation, sol-gelchemistry, and nanotechnology.