Golf Ball-like Polymer Particles by Colloidal Etching.

The unique core-corona structure of raspberry-like particles makes it an ideal template for the fabrication of golf ball-like particles by selective removal of the corona particles. However, few types of raspberry-like polymer-polymer core-corona composite particles have been used as the templates, probably because it is relatively difficult to synthesize well-defined raspberry-like polymer-polymer composite particles. We describe, for the first time, the fabrication of golf ball-like polymer particles by colloidal etching of raspberry-like poly(glycidyl methacrylate)-polystyrene (PGMA-PS) composite particles in a tetrahydrofuran (THF)/water medium with a higher THF concentration.

Synthesis of Raspberry-like PMMA Particles In a Ternary Solvent Mixture with Binary Initiators.

There is continuing interest in the synthesis of raspberry-like polymer particles, among which most of the reports have tended to focus on polymer composite particles, while there are relatively few examples of polymer particles with a single component. In this study, raspberry-like poly(methyl methacrylate)(PMMA) particles were synthesized by a one-step method in a ternary solvent mixture with binary initiators. The effects of different polymerization parameters, including the solvent composition, the initiator composition, the stabilizer component, the polymerization temperature, the stirring rate, and the nature of the monomer, on the morphology and size of the resulting particles were studied.

Metabolic engineering of Komagataella phaffii for the efficient utilization of methanol.

Background: Komagataella phaffii, a type of methanotrophic yeast, can use methanol, a favorable non-sugar substrate in eco-friendly bio-manufacturing. The dissimilation pathway in K. phaffii leads to the loss of carbon atoms in the form of CO.

Preparation of Surface-Wrinkled Silica-Polystyrene Colloidal Composite Particles.

In this work, we report a facile emulsion swelling route to prepare surface-wrinkled silica-polystyrene (SiO-PS) composite particles. Submicrometer-sized, near-spherical SiO-PS composite particles were first synthesized by dispersion polymerization of styrene in an ethanol/water mixture, and then, surface-wrinkled SiO-PS particles were obtained by swelling the SiO-PS particles with a toluene/water emulsion and subsequent drying. It is emphasized that no surface pretreatment on the SiO-PS composite particles is required for the formation of the wrinkled surface, and the most striking feature is that the surface-wrinkled particle was not deformed from a single near-spherical SiO-PS composite particle but from many ones.

PPGR: a comprehensive perennial plant genomes and regulation database.

Perennial woody plants hold vital ecological significance, distinguished by their unique traits. While significant progress has been made in their genomic and functional studies, a major challenge persists: the absence of a comprehensive reference platform for collection, integration and in-depth analysis of the vast amount of data. Here, we present PPGR (Resource for Perennial Plant Genomes and Regulation; https://ngdc.

Dynamic Demand Evaluation of COVID-19 Medical Facilities in Wuhan Based on Public Sentiment.

Medical facilities are an important part of urban public facilities and a vital pillar for the survival of citizens at critical times. During the rapid spread of coronavirus disease (COVID-19), Wuhan was forced into lockdown with a severe shortage of medical resources and high public tension. Adequate allocation of medical facilities is significant to stabilize citizens' emotions and ensure their living standards.