Thermodynamic coupling analysis of precision molding process for chalcogenide glass microlens array under multiple loads.

Precision glass molding (PGM) technology, as an efficient and straightforward method for producing glass lenses, has been widely applied in the mass production of aspheric glass lenses. However, molding complex surfaces such as free-form and array surfaces is still in its infancy. To reveal the variations of temperature and stress of microlens array (MLA) optical elements during the molding process, a simulation model was established using the finite element method (FEM), and the heating and forming stages of a chalcogenide glass MLA optical element were studied.

Volume Bragg grating with tunable reflectivity and the bandwidth assisted Fabry-Pérot cavity.

The rigid Fabry-Pérot (F-P) cavity has emerged as the preferred core sensing component for optical pressure, vibration, and acoustic sensing in harsh environments, owing to its high reliability and structural stability. However, due to the inadequate temperature resistance of the optical dielectric film, maintaining a high level of precision in the rigid F-P cavity at elevated temperatures proves to be challenging. Volume Bragg grating (VBG) is a three-dimensional optical element modified by a femtosecond laser within a transparent glass medium to create a periodic refractive index distribution.

High-speed secure stream cipher using synchronized chaos and the RC4 algorithm for optical communications.

A high-security, high-speed stream cipher for physical-layer-secure optical communication, based on optical-carrier-induced private chaos synchronization and RC4 algorithm, is proposed and numerically demonstrated. The high security and speed are achieved by combining physical true random numbers generated from synchronized chaos, used as the key for random DNA coding, with the RC4 pseudo-random numbers. Moreover, no third-party signal is required as the optical carrier itself serves as the common drive for chaos synchronization in semiconductor lasers.

Fucoidan exerts antitumor effects by regulating gut microbiota and tryptophan metabolism.

Fucoidan, a water-soluble polysaccharide derived from marine organisms, has garnered significant attention for its ability to regulate gut microbiota and its anti-tumor properties. However, the existence of a correlation between the anti-tumor effect of fucoidan and its regulation of the gut microbiota remains unknown. In pursuit of this objective, we culled the gut microbiota of mice with broad-spectrum antibiotics to generate pseudo-sterile tumor-bearing mice.

Recent advances in nutraceutical delivery systems constructed by protein-polysaccharide complexes: A systematic review.

Most nutraceuticals have low stability and solubility, making it difficult to achieve ideal bioavailability by directly incorporating into food. Therefore, constructing delivery systems to protect nutraceuticals is an essential strategy. Proteins and polysaccharides have become ideal materials for encapsulating nutraceuticals due to their superior nutritional value, edible safety, and physicochemical properties.