Tag: Materials

3D Liquid-Cell Electron Microscopy Imaging Now Possible

Electron microscopy revealed a world that exists at scales smaller than the wavelength of light. Advancements in this field have allowed scientists to visualize ever more objects and processes, but actually seeing living cells in 3D and within a liquid environment has been impossible. Now, a team of researchers from Penn State University, Virginia (Read more...)

Peptide Particles Ferry Drugs Across Blood-Brain Barrier

Most drugs, genetic materials, and other therapeutic agents are very difficult to use inside the brain because of the blood-brain barrier. There have been attempts to use ultrasound and microbubbles to create temporary passages through the barrier, including as a possible therapy for Alzheimer’s disease, but this is approach is not easy or id (Read more...)

New Chip for Microwave Imaging of Body

Today’s clinicians are limited to a few imaging modalities, primarily X-ray, CT, MRI, and ultrasound. Microwaves, in principle, can also be used as a useful way to look inside the body. Microwave radiation is non-ionizing, so should be safer than X-rays, but in practice microwave imagers, because of the electronics inside, have remained bulky (Read more...)

Implantable Nanolasers for Tissue Imaging, Neurotherapy

A variety of imaging techniques and technologies, such as optogenetics, could benefit from devices that can emit visible laser light from inside tissues. Conventional lasers are too large, while nanolasers tend to be inefficient, heating up too much, and typically require damaging ultraviolet light to power them. Now, researchers at Northwestern an (Read more...)

Hydrogel Mimics of Heart Tissue to Study Cardiac Reshaping Following Aortic Valve Implantation

Transcatheter aortic valve replacement (TAVR) procedures have become a popular way of treating aortic valve stenosis, a condition in which the valve stiffens and worsens cardiac function. Following implantation of a prosthetic valve, the hearts of patients tend to undergo significant reconstruction around the treatment site, but the mechanics of th (Read more...)

Bacterial Swarmbots to Produce Biologic Drugs

Biologics, being a group of drugs synthesized from biological sources, are often produced using bacteria. The manufacturing processes are usually slow and laborious, though they do benefit from economies of scale. Producing small quantities of biologics is typically limited to research labs, and even there it is limited in scope. Researchers at Duk (Read more...)