We present results of an investigation of preservice secondary mathematics and science teachers’ conceptions of project-based instruction (PBI) and their enactments of PBI in apprentice (student) teaching. We evaluated their thinking and implementations within a composite framework based on the work of education researchers. We analyzed survey responses, both qualitatively and statistically, fr...

BACKGROUND Blast injury is uncommon, and remains poorly understood by most clinicians outside regions of active warfare. Primary blast injury (PBI) results from the interaction of the blast wave with the body, and typically affects gas-containing organs such as the ear, lungs and gastrointestinal tract. This review investigates the mechanisms and injuries sustained to the abdomen following blas...

The title complex, {(C(16)H(12)FN(2))[PbI(3)]}(n), consists of 1-[(2-fluoro-benzyl-idene)amino]-quinolinium cations and a polymeric PbI(3) (-) anion formed by face-sharing PbI(6) octa-hedra. These octa-hedra form straight and regular infinite chains along the b axis. In the asymmetric unit, one cation and one anionic [PbI(3)](-) fragment are observed in general positions. Polymeric chains are p...

Observations on Surface Microtopography of gel grown PbI crystals and thin films of gel 2 grown PbI crystals are reported. Initiation of 2 growth layers, interlacing pattern, dendritic growth, symmetry and asymmetry hexagonal arms and natural triangular etch pits were seen. The surface topography, of gel grown PbI crystals and 2 of thin films of gel grown PbI have been related to 2 the growth ...

A perylene bisimide (PBI) derivative (C-PBI-Py) of pyrene (Py) and cholesteryl residue (C) possessing intra-molecular energy transfer properties and three reference compounds (C-Py, C-PBI, PBI-Py) were designed and synthesized, where C was introduced in order to enhance the solubility of the relevant compounds in organic solvents. UV-vis absorption, steady-state fluorescence, cyclic voltammetri...

OBJECTIVE The present study aimed to evaluate the psychometric properties of the Parental Bonding Instrument (PBI) for Turkish university students. METHOD A total of 336 (% 61.5) female and 211 (%38.5) male students attending Ankara and Pamukkale Universities participated in the study. The mean age of the participants is 21.55 (SD=1.65) with a range of 18-26. The construct validity is examine...

A high performance three-dimensional (3D) thiophene-annulated perylene dye, namely tetra-PBI-S, was designed and synthesized. The appropriate LUMO level, balanced carrier mobilities and favourable phase separation make tetra-PBI-S based solar cells show a much higher power conversion efficiency (PCE) of 6.2% than tetra-PBI based solar cells with a PCE of 3.6%.

In our study, one-dimensional PbI₂/polyvinylpyrrolidone (PVP) composition fibers have been prepared by using PbI₂ and PVP as precursors dissolved in N,N-dimethylformamide via a electrospinning process. Dipping the fibers into CH₃NH₃I solution changed its color, indicating the formation of CH₃NH₃PbI₃, to obtain CH₃NH₃PbI₃/PVP composite fibers. The structure, morphology and composition of the all...

Here we report the first example of an isolable, ambient stable perylene bisimide (PBI) dianion which was synthesized by catalytic reduction of a highly electron deficient PBI derivative. The remarkable stability of this unprecedented dianion in air for months facilitated its complete characterization by different methods, including single crystal X-ray analysis. Furthermore, solvent dependent ...

Completion of the first meiosis in oocytes is achieved by the extrusion of the first polar body (PBI), a particular example of cell division. In mitosis, the small GTPase RhoA, which is activated by epithelial cell transforming protein 2 (ECT2), orchestrates contractile ring constriction, thus enabling cytokinesis. However, the involvement of this pathway in mammalian oocytes has not been estab...