Enzyme-powered hollow mesoporous Janus nanomotors

The development of synthetic nanomotors for technological applications in particular for life science and nanomedicine is a key focus of current basic research. However, it has been challenging to make active nanosystems based on biocompatible materials consuming nontoxic fuels for providing self-propulsion. Here, we fabricate self-propelled Janus nanomotors based on hollow mesoporous silica nanoparticles (HMSNPs), which are powered by biocatalytic reactions of three different enzymes: catalase, urease, and glucose oxidase (GOx). The active motion is characterized by a mean-square displacement (MSD) analysis of optical video recordings and confirmed by dynamic light scattering (DLS) measurements. We found that the apparent diffusion coefficient was enhanced by up to 83%. In addition, using optical tweezers, we directly measured a holding force of 64 ± 16 fN, which was necessary to counteract the effective self-propulsion force generated by a single nanomotor. The successful demonstration of biocompatible enzyme-powered active nanomotors using biologically benign fuels has a great potential for future biomedical applications

PRODUCTIVITY FOR THE FUTURE: FOOD PROCESSING

Now that the era of cheap energy is over what approaches does the food processing industry need to take to improve productivity

PRODUCTIVITY FOR THE FUTURE: FOOD PROCESSING

Now that the era of cheap energy is over what approaches does the food processing industry need to take to improve productivity.Productivity Analysis,

An Anthology of Food Science : Milestones in Nutrition. vol. II

x, 797 tr. ; 24 cm