The properties of organic molecules are intimately related to their shape. In many structurally complex organic molecules, shape is influenced—or dictated—by the three-dimensional orientation of ...

CORRECTION: This story was updated on April 21, 2016, to clarify that the method described was not the first radical-based route to chiral quaternary carbon centers. The method is the first route ...

Making molecules with quaternary carbon bonds—four carbons attached to a central C—is tricky but necessary for medicinal chemists. Quaternary C bonds have a discrete shape, Princeton University ...

In medicine, there are four levels of care: primary, secondary, tertiary, and quaternary. The levels of care refer to the complexity of the medical cases that healthcare providers treat and the skills ...

The Quaternary Period is a geologic time period that encompasses the most recent 2.6 million years — including the present day. Part of the Cenozoic Era, the period is usually divided into two epochs ...

A new study by Dr. Margherita Mussi, published in Quaternary International, highlights how naturally occurring basalt spheres may have been used by hominin species as a type of tool for more than 1 ...

PUNE, India, Nov. 24, 2025 /PRNewswire/ -- Apollo Hospitals, Asia’s pioneering integrated healthcare services provider, today inaugurated its newest facility in Swargate, Pune. The hospital will ...

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