Off-axis electron holography of bacterial cells and magnetic nanoparticles in liquid

The mapping of electrostatic potentials and magnetic fields in liquids usingelectron holography has been considered to be unrealistic. Here, we showthat hydrated cells ofMagnetospirillum magneticumstrain AMB-1 and assem-blies of magnetic nanoparticles can be studied using off-axis electronholography in a fluid cell specimen holder within the transmission electronmicroscope. Considering that the holographic object and reference waveboth pass through liquid, the recorded electron holograms show sufficientinterference fringe contrast to permit reconstruction of the phase shift ofthe electron wave and mapping of the magnetic induction from bacterialmagnetite nanocrystals. We assess the challenges of performingin situmagne-tization reversal experiments using a fluid cell specimen holder, discussapproaches for improving spatial resolution and specimen stability, and outlinefuture perspectives for studying scientific phenomena, ranging from interpar-ticle interactions in liquids and electrical double layers at solid–liquidinterfaces to biomineralization and the mapping of electrostatic potentialsassociated with protein aggregation and folding

A study on Kazakh Academicians' information technology acceptance [Kazak Akademisyenlerin Bilgi Teknolojilerini Kabulü Üzerine Bir Araştırma]

Information technologies (ITs), which have become one of the key enablers of success in educational competitiveness, have made the understanding of user technology acceptance crucial. The failures of IT investment and implementation lead to unwanted organizational outputs. A better understanding of the contributions of the factors determining the individual's intention to use (IU) IT during the acceptance process will help to prevent probable visible and invisible losses. This research attempts to validate a new technology acceptance model (TAM) version extended with the constructs of Subjective Norm (SN) and Facilitating Conditions (FC) in the context of Kazakh Academicians. The results indicate that this variant of extended TAM will be able to facilitate managers to appropriately employ their strategic decisions on the investments and implementations of IT in educational settings while contributing to the technology acceptance research field. On the other hand, the model is open to development for a higher predictive value

Following iron speciation in the early stages of magnetite magnetosome biomineralization

International audienceAbstrac