Exposing what's in tattoo ink

From life-like faces to elaborate nature scenes, tattoos are a true art form. Although people have decorated their bodies for millennia for ceremonial and religious reasons, many people today adorn themselves with these images ...

Nanorods overcome tigecycline resistance of Klebsiella pneumonia

Long-term and excessive use of antibiotics has caused the spread of antibiotic resistance. The time- and cost-consuming process of new antibiotic development results in the much slower emergence of new antibacterial drugs ...

Music-making and the flow of aerosols

The latest research from the labs of Penn scientists Paulo Arratia and Douglas Jerolmack was an answer to "a call for help," says Arratia.

Researchers unveil a secret of stronger metals

Forming metal into the shapes needed for various purposes can be done in many ways, including casting, machining, rolling, and forging. These processes affect the sizes and shapes of the tiny crystalline grains that make ...

Characterizing limestone rocks with Raman spectroscopy

Research published in The European Physical Journal Plus shows that it is possible to classify rocks according to the size of the particles they contain during quarrying, using a portable Raman spectrometer.

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