in this study, an attempt has been made to study the effect of bi2o3 addition as nucleating agent on the liquid-liquid phase separation, crystallization and dielectric properties of samples prepared by sintering and crystallization of powdered glass in pbo-tio2-b2o3-sio2 glass-ceramic system using dta, xrd, sem and lcr techniques. the results showed that the addition of bi2o3 resulted in a quit...

The ability of the Schizosacchromyces pombe spindle pole body to nucleate microtubules is activated at the onset of mitosis for forming a mitotic spindle, but it is inactivated during interphase. We have previously developed an in vitro assay for studying the molecular mechanism of spindle pole body activation using permeabilized interphase S. pombe cells and Xenopus mitotic extracts. We have s...

Many physiologists believe that hatchling painted turtles (Chrysemys picta) provide a remarkable, and possibly unique, example of 'natural freeze-tolerance' in an amniotic vertebrate. However, the concept of natural freeze-tolerance in neonatal painted turtles is based on results from laboratory studies that were not placed in an appropriate ecological context, so the concept is suspect. Indeed...

Abstract We selected the thirteen most effective nucleating agents for Poly(lactic acid) (PLA) from literature, and synthesized compounded them with two different PLA grades: 3001D (1.4% D-lactide content) 3100HP (0.5% content, considered PLLA). determined crystallinity crystallization of in identical conditions (same agent same cooling rate) help differential scanning calorimetry. compared eff...

Environmental protection is the future trend of power equipment development, and also a research hotspot in field cable insulation recent years. Due to excellent electrical properties recyclability, polypropylene (PP) based composites are regarded as promising insulating materials for eco-friendly next-generation cables. However, high modulus hardness pure PP make it difficult be directly emplo...

As a renewable and biodegradable polymer, polylactide (PLA) has taken foothold in the packaging industry. However, thermomechanical barrier properties of PLA-based films need to be improved facilitate wider adoption. To address this challenge, we examined effect talc reinforcement composites based on PLA polyester. Masterbatches polymers were produced by melt compounding processed either inject...

Microtubule organization and nucleation were studied during in vitro human myogenesis by immunocytology that used monoclonal and polyclonal antitubulin antibodies and a rabbit nonimmune serum that reacts with human centrosomes. In myoblasts, we observed a classical microtubule network centered on juxtanuclear centrosomes. Myotubes possessed numerous microtubules organized in parallel without an...