Seahenge may have been built to combat climate change Seahenge, an ancient timber monument discovered on an English beach, may have been built to counteract climate deterioration, according to a study in GeoJournal. The research suggests that Seahenge and the nearby Holme II were ritual structures aimed at bringing warmth during periods of severe cold […]
“Helicene” is the name introduced by Newman in 1955, to describe the benzologues of phenanthrene in which the extra ortho -condensed rings give rise to a (regular) cylindrical helix. The pioneer work of Newman in this field cannot be overemphasized; his brillant synthesis and resolution of [6]helicene will remain as a landmark, for it opened […]
The perception of food occurs when food enters the oral cavity and depends on the action of three complementary sensory systems: somesthesia (a group that includes mechanoreception, thermal sensation and nociception), retronasal olfaction and taste. Taste is one of the five classical senses, along with smell, touch, hearing and sight. One of the most common […]
Convenient fast charging and energy density of lithium-ion batteries have long been considered a trade-off, which has hindered the widespread adoption of electric vehicles. A new process will help develop stable, high-energy-density lithium-ion batteries capable of fast charging. A crucial prerequisite for the widespread adoption of electric vehicles (EVs) is the enhancement of lithium-ion battery […]
It is clear that the world began before human beings learned to speak and even long before they made their appearance. However, as far as we are concerned and from our subjective point of view, “everything” began when we were able to articulate our thoughts as a sequence of meaningful words, for it was then […]
Evolution may have moved energy to brain from ovaries Human brain growth may have taken off by seizing energy left after ovarian follicles adapted to require less fuel. The math shows that evolution freed up about the same amount of energy from follicular maintenance that human brains needed to reach their current size. Full Story: […]
Electrical transport in non-centrosymmetric materials departs from the well-established phenomenological Ohm’s law. Instead of a linear relation between current and electric field, a non-linear conductivity emerges along specific crystallographic directions. This non-linear transport is fundamentally related to the lack of spatial inversion symmetry. Ohm’s law is one of the most established relations in Physics and […]
A roasted and ground coffee matrix is a highly complex porous medium characterized by multiscale features. A typical coffee matrix used for double-shot espresso brew is about 15 ml in volume and consists of millions of coffee particles. These coffee particles are produced by grinding roasted coffee beans, and have an approximately bimodal size distribution […]
In organic chemistry, π-stacking systems are supramolecular structures that arise due to the dispersion force, a type of intermolecular noncovalent interaction. They are a common occurrence in nature. The stabilized structure of DNA is a very prominent example of a π-stacking system, and so are the arrangement of amino acids in certain proteins. Interestingly, π-stacking […]
Imagine you’re standing near the edge of the Antarctic Ice Sheet, gazing out over the ocean, when the ice near you starts to melt very rapidly. A surge of meltwater flows into the ocean. Surprisingly, you watch the sea level fall – not rise. But why? When we think of sea level rise, we picture […]