Compared with a normal mouse cochlea (top), cisplatin exposure reduces the number of outer hair cells (middle). But the loss of these cells is prevented by treatment with the CDK2 inhibitor kenpaullone (bottom). Credit: Teitz et al., 2018

Researchers from St. Jude Children’s Research Hospital have discovered that inhibiting an enzyme called cyclin-dependent kinase 2 (CDK2) protects mice and rats from noise- or drug-induced hearing loss. The study, which will be published March 7 in the Journal of Experimental Medicine, suggests that CDK2 inhibitors prevent the death of inner ear cells, which has the potential to save the hearing of millions of people around the world.

According to the World Health Organization, 360 million people worldwide, including 32 million children, suffer from hearin...

Illustration of the non-line-of-sight imaging system. Credit: Stanford Computational Imaging Lab

Someday your self-driving car could react to hazards before you even see them, thanks to a laser-based imaging technology that can peek around corners. It sounds like magic but the idea of non-line-of-sight imaging is actually feasible,” said Gordon Wetzstein, assistant professor of electrical engineering and senior author of the paper describing this work, published March 5 in Nature.

The Stanford group isn’t alone in developing methods for bouncing lasers around corners to capture images of objects. Where this research advances the field is in the extremely efficient and effective algorithm the researchers developed to process the final image...

BENZOIC ACID

~Benzoic acid is also known as 65-85-0; Benzenecarboxylic acid; Dracylic acid; Carboxybenzene; Benzeneformic acid etc. occurs naturally in many plants and is used as an intermediate in the biosynthesis of many metabolites. It is the simplest aromatic carboxylic acid and is fairly cheap and readily available.

Chemical structure: C₇H₆O₂ (or C₆H₅COOH)

Odor/ color: faint pleasant, odor, colorless crystalline solid

Production: 

a) Commercially it is produced by partial oxidation of toluene with oxygen, and catalyzed by cobalt or manganese naphthenate.

b) Hydrolysis: benzonitrile/ benzamide can be hydrolyzed to benzoic acid or its conjugate base in acid/ basic conditions.

c) Cannizzaro reaction: Disproportionation (redox reaction) of benzaldehyde -> benzoate and benzyl alcoh...

Hubble uncovers a vast, complex dust structure, about 150 billion miles across, enveloping the young star HR 4796A. A bright, narrow inner ring of dust is already known to encircle the star, based on much earlier Hubble images. This newly discovered huge dust structure around the system may have implications for what a yet-unseen planetary system looks like around the 8-million-year-old star. Credit: NASA/ESA/G. Schneider (Univ. of Arizona)

Astronomers have used NASA’s Hubble Space Telescope to uncover a vast, complex dust structure, about 150 billion miles across, enveloping the young star HR 4796A. A bright, narrow, inner ring of dust is already known to encircle the star and may have been corralled by the gravitational pull of an unseen giant planet...