A small team of chemists, having learned the secrets of light absorption from chlorophylls a and b, can now tune molecules to absorb anywhere in the solar spectrum. They are using this facility to synthesize pigments that fill gaps in the sunlight absorbed by native pigments and to push deeper into the infrared than any native pigment.
A key molecular mechanism behind the health benefits of dietary restriction has been identified by researchers. Also known as calorie restriction, dietary restriction is best known for its ability to slow aging in laboratory animals. The findings here show that restricting two amino acids, methionine and cysteine, results in increased hydrogen sulfide (H2S) production and protection against ischemia reperfusion injury, damage to tissue that occurs following the interruption of blood flow as during organ transplantation and stroke.
Efforts to connect the evolutionary transition from fish fins to wrist and fingers with the genetic machinery for this adaptation have fallen short because they focused on the wrong fish. Now, researchers describe the genetic machinery for autopod assembly in a non-model fish, the spotted gar.
Cells have finger-like projections that they use to feel their surroundings. They can detect the chemical environment and they can 'feel' their physical surroundings using ultrasensitive sensors. New research shows how the finger-like structures, called filopodia, can extend themselves, contract and bend in dynamic movements.
Joshua Lambus is an award winning photographer and videographer based on the Big Island of Hawaii. He specialises in ‘blackwater’ diving, which involves travelling up to 8 kilometres off the shore of Hawaii, and diving into the ocean in the black of night, when thousands upon thousands of deep-sea species head to the surface to feed. It’s the largest migration of any group of animals on the planet, and Lambas is there to photograph even the tiniest of creatures. Sinking to no more than 18 metres below the surface, he captures images of species that have often never been seen before,...