Apodized phase contrast microscopy for bright high contrast reveals motion of organelles

Optical Review - We have developed a high magnification objective lens performed with apodized phase contrast microscopy for bright high contrast, aiming to image finer intact intracellular...     

Influence of carbon contamination on etched GaSb substrate on the quality of MBE-GaSb film and electrical transport through the film and the substrate

Undoped MBE-GaSb films were grown on undoped GaSb (100) substrates and the influence of carbon contamination on the etched GaSb substrate on the grown film were investigated. It was found that carbon contamination of the etched GaSb substrate was dependent on the chemical treatment method and produced stacking faults in the subsequent MBE growth of the GaSb film. Carbon contamination on the etched GaSb substrate degraded the quality of the GaSb film and affected ohmic characteristics between the film and the substrate. Substrate surface free of carbon contamination and thereby exhibitting no influence on the electrical transport through the film and the substrate could be reproducibly obtained by performing an oxide etch-off chemical treatment on the GaSb substrate.     

One‐Pot Synthesis of Novel Branched Polylactide Through the Copolymerization of Lactide with Mevalonolactone

Polylactide, which is a biodegradable and bio‐absorbable polymer having low immunogenicity and good biocompatibility, has been mainly studied for biomedical applications. Branched polymers have different rheological and mechanical properties compared with their linear counterparts owing to their molecular architectures. We synthesized novel biodegradable polylactide having a branched structure composed of metabolically degradable and/or absorbable materials only. The branched polylactide was obtained from a one‐pot copolymerization of L ‐lactide using metabolic intermediate dl ‐mevalonolactone as a bifunctional comonomer having both lactone ring and pendant hydroxy group. The glass transition point, melting point and crystallinity of the branched polylactide are lower than those of linear polylactide.