Sowwan M.,Al Ouds University |
Faroun M.,Al Ouds University |
Mentovich E.,Tel Aviv University |
Ibrahim I.,Al Ouds University |
And 5 more authors.
Macromolecular Rapid Communications | Year: 2010
In this study, DNA block copolymer (DBC) micelles with a polystyrene (PS) core and a singlestranded (ss) DNA shell were doped with ferrocene (Fc) molecules. Tapping mode atomic force microscopy (AFM) was used to study the morphology of the doped and undoped block copolymer aggregates. We show that introducing Fc molecules into the hydrophobic core does not affect the structural properties such as shape or size. In contrast, doping with Fc significantly changes the micelles' electrical properties, namely their polarizability. Electrostatic force microscopy (EFM) measurements reveal that the undoped micelles show no significant polarization signal, while the Fc-doped aggregates exhibit strongly enhanced polarizability. Furthermore, the nucleic acidmoieties were utilized in combination with complementary ssDNA strands to assemble single particles into linear arrays of DBC nanoobjects. The ability to tune the electrostatic properties of the polymer core and the presence of nucleic acids might open the way for using these bioorganic nanoparticles as building blocks for nanoelectronic or biosensing devices. (Figure Presented) © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PubMed | Al Ouds University
Type: Comparative Study | Journal: Eastern Mediterranean health journal = La revue de sante de la Mediterranee orientale = al-Majallah al-sihhiyah li-sharq al-mutawassit | Year: 2010
This study assessed gender differences in oral health knowledge, attitude and behaviour among undergraduate dental students in Palestine. Students aged 18-22 years at Al Quds University (n=260) completed the English version of the Hiroshima University-Dental Behavioral Inventory. Females had more positive dental health attitudes and behaviours (making regular visits the dentist, being more educated about professional toothbrushing and taking more care with brushing their teeth). Half the students of both sexes thought they could not avoid having false teeth when they were old. Some aspects of oral health behaviour and attitudes were different between males and females, but in other aspects professional training may have compensated for these differences.