This study presents the first ever data of extracting chitin from the Chiton shell, which then converted to the soluble chitosan by soaking in the 45% NaOH solution. The obtained chitin and chitosan were characterized by the seven different methods. Antioxidant activity of the extracted chitosan was also evaluated using the two methods. The shell content was divided into calcium carbonate (90.5...

Abstract The shell structure design of modern spacecraft internal devices is developing towards lightweight, high-performance, and low-cost. In order to achieve a lightweight construction the structure, this work takes as an optimization object. Under premise ensuring that stiffness box meets requirements, adopts post-design method. First, preliminary model was conducted using SolidWorks, then ...

We report on the syntheses of core-shell Fex@Pt (x=0.4-1.2) nanoparticles (NPs) with Pt-shell thickness systematically controlled while the overall particle size is constant. The syntheses were achieved via one-pot ultrasound-assisted polyol synthesis (UPS) reactions. Fe1.2@Pt showed a record-breaking high core-element content (55 at%) of core-shell NPs. Based on observations from a series of c...

We investigate the role of symmetry as a possible origin of chaos in the nuclear shell model. For this purpose we disentangle purely geometrical effects due to spin and isospin coupling of the many–body states, from effects of the reduced two– body interaction. We compare a model without symmetry (the embedded two– body ensemble of random matrices) with the two–body random ensemble (TBRE) of th...