With delicate hues of purple and pink, a lab technique called gram staining has reliably characterized bacteria for more than a century. Yet many scientists are mistaken about why the vivid method ...

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...

TODAY'S Google Doodle celebrates Danish microbiologist Hans Christian Gram. But who was he and what did he discover? Hans Christian Gram was a Danish microbiologist who Google is celebrating today on ...

Compared with other urine analysis methods, urine Gram stain has a moderate predictive value for detecting gram-negative bacteria in urine culture but does not significantly improve urinary tract ...

There's a problem in cell biology research: to study what happens inside a cell, it has to be destroyed. When scientists use a traditional microscope to observe a cell, they use stains -- chemicals ...

The Google doodle shows Gram carrying out an experiment, a close up of the bacteriologist, a microscope and bacteria particles. Gram was appointed professor of medicine at the University of Copenhagen ...

Ralph Lange used a confocal microscope to capture this image of bovine endothelial cells which are about 100 µm wide. Although this was just a practice exercise with dead cells, Lange’s postdoc work ...

Who was Hans Christian Gram? Hans Christian Gram was a Danish microbiologist who Google is celebrating today on his 166th birthday. The doodle that honours Gram on his birth anniversary today was ...