Medical research

Loose RNA molecules rejuvenate skin, researchers discover

Want to smooth out your wrinkles, erase scars and sunspots, and look years younger? Millions of Americans a year turn to lasers and prescription drugs to rejuvenate their skin, but exactly how that rejuvenation works has ...

Oncology & Cancer

Laser light detects tumors

Cancer—this diagnosis affects almost every second German at some point in their life. It is the second most frequent cause of death in Germany. But the earlier the disease is diagnosed, the greater are the chances of surviving ...

Neuroscience

Proof it's possible to enhance or suppress memories

What if scientists could manipulate your brain so that a traumatic memory lost its emotional power over your psyche? Steve Ramirez, a Boston University neuroscientist fascinated by memory, believes that a small structure ...

Neuroscience

What's the right amount of 'zapping' in epilepsy laser surgery?

There is an estimated 2.4 million people diagnosed with epilepsy each year, according to the World Health Organization. Some types of epileptic seizure can be essentially cured by open surgery for patients who don't respond ...

Neuroscience

Blood flow command centre discovered in the brain

A team of scientists from Australia, France, New Zealand and the UK has discovered a group of brain cells that function as a 'master-controller' for the cardiovascular system by orchestrating the control of blood flow to ...

Neuroscience

Using laser light to study how epilepsy arises in the healthy brain

Scientists at McGill University have developed a new method to study how seizures arise in the healthy brain. Using laser light guided through ultra-thin optic fibers in the brain of rodents, the researchers "turned on" light-sensitive ...

Surgery

Over 17.7 million cosmetic procedures performed in U.S. in 2018

(HealthDay)—More than 17.7 million surgical and minimally invasive cosmetic procedures were performed in the United States in 2018, with an increasing trend seen in body-shaping procedures, according to a report published ...

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Laser

A laser is a device that emits light (electromagnetic radiation) through a process called stimulated emission. The term laser is an acronym for light amplification by stimulated emission of radiation. Laser light is usually spatially coherent, which means that the light either is emitted in a narrow, low-divergence beam, or can be converted into one with the help of optical components such as lenses. Typically, lasers are thought of as emitting light with a narrow wavelength spectrum ("monochromatic" light). This is not true of all lasers, however: some emit light with a broad spectrum, while others emit light at multiple distinct wavelengths simultaneously. The coherence of typical laser emission is distinctive. Most other light sources emit incoherent light, which has a phase that varies randomly with time and position.

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