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Archive for the ‘biological’ category: Page 47

Oct 13, 2023

Unraveling Quantum Secrets: Physicists Bridge Two Quantum Worlds

Posted by in categories: biological, chemistry, particle physics, quantum physics

“The surprising thing we found is that in a particular kind of crystal lattice, where electrons become stuck, the strongly coupled behavior of electrons in d atomic orbitals actually act like the f orbital systems of some heavy fermions,” said Qimiao Si, co-author of a study about the research in Science Advances

<em> Science Advances </em> is a peer-reviewed, open-access scientific journal that is published by the American Association for the Advancement of Science (AAAS). It was launched in 2015 and covers a wide range of topics in the natural sciences, including biology, chemistry, earth and environmental sciences, materials science, and physics.

Oct 13, 2023

Hybrid transistors with silk protein set stage for integration of biology and microelectronics

Posted by in categories: biological, computing, mobile phones

Your phone may have more than 15 billion tiny transistors packed into its microprocessor chips. The transistors are made of silicon, metals like gold and copper, and insulators that together take an electric current and convert it to 1s and 0s to communicate information and store it. The transistor materials are inorganic, basically derived from rock and metal.

But what if you could make these fundamental electronic components part biological, able to respond directly to the environment and change like living tissue?

This is what a team at Tufts University Silklab did when they created transistors replacing the insulating material with biological silk. They reported their findings in Advanced Materials.

Oct 13, 2023

Scientists unlock biological secrets of the aging process

Posted by in categories: biological, life extension

How we grow old gracefully—and whether we can do anything to slow down the process—has long been a fascination of humanity. However, despite continued research the answer to how we can successfully combat aging still remains elusive.

Oct 11, 2023

The biological blueprint of arithmetic: Unveiling the connection between evolutionary perception and mathematics

Posted by in categories: biological, mathematics

Arithmetic, rooted in our biological perception, is a natural consequence of how we perceive and organize the world around us. This connection between perception and mathematical truths suggests that mathematics is both a uniquely human invention and a universal discovery, highlighting a profound unity between the mind and the physical universe…

Oct 10, 2023

Darwin or Kimura? Natural selection or pure chance? New literature review aims to clarify a heated debate

Posted by in categories: biological, evolution, genetics

Some of nature’s mysteries have kept scientists busy for decades—for example, the processes that drive evolution. The question of whether certain differences between and within species are caused by natural selection or by chance processes divides evolutionary biologists even today. Now, an international team of researchers has teased apart a scientific debate concerning the evolutionary theories of Darwin and the Japanese geneticist Kimura. Their conclusion: the debate is unnecessarily convoluted by the co-existence of different interpretations.

Due to his contributions to geological and , British naturalist Charles Darwin (1809–1882) is considered one of the most important natural scientists. His influential work “On the Origin of Species” (1859), with its strictly scientific explanation of the diversity of life, forms the basis of modern evolutionary biology. Darwin concluded that species evolve through natural selection: well-adapted organisms survive, others don’t.

However, by the end of the 1960s, the Japanese geneticist Motoo Kimura (1924–1994) proposed that at the genetic level, most changes in the course of evolution do not offer direct advantages or disadvantages to the individual but are simply neutral. According to his “Neutral Theory of Molecular Evolution,” first published in 1968, most of the within and between species arises from random fluctuations of neutral mutations.

Oct 9, 2023

How to watch two astronauts check the ISS for microbes

Posted by in categories: biological, space

Two astronauts will perform a spacewalk from the International Space Station, collecting samples from the station’s exterior to use in scientific research.

Oct 8, 2023

Researchers catch protons in the act of dissociation with ultrafast ‘electron camera’

Posted by in categories: biological, chemistry, particle physics

Scientists have caught fast-moving hydrogen atoms—the keys to countless biological and chemical reactions—in action.

A team led by researchers at the Department of Energy’s SLAC National Accelerator Laboratory and Stanford University used ultrafast electron diffraction (UED) to record the motion of hydrogen atoms within ammonia molecules. Others had theorized they could track hydrogen atoms with electron diffraction, but until now nobody had done the experiment successfully.

The results, published in Physical Review Letters, leverage the strengths of high-energy Megaelectronvolt (MeV) electrons for studying hydrogen atoms and proton transfers, in which the singular proton that makes up the nucleus of a hydrogen atom moves from one molecule to another.

Oct 8, 2023

How humans will reach beyond biological bodies

Posted by in categories: biological, life extension, robotics/AI

This video discusses what it would mean to live forever or to have a greatly expanded lifespan. Would we inevitably grow bored with existence? Why do we even want to live longer?

We also discuss the philosophy of the Ship of Theseus as it applies to mind upload or body transfer. If you transfer your mind to a new body, are you still the same person? We conclude that the answer is yes if and only if you experience no discontinuities in consciousness.

Continue reading “How humans will reach beyond biological bodies” »

Oct 7, 2023

Robert Sapolsky: Justice and morality in the absence of free will

Posted by in categories: biological, neuroscience

In September 2020 we sat down with Robert Sapolsky, Stanford professor and the author of Human Behavioral Biology lectures (https://youtu.be/NNnIGh9g6fA) to discuss if it’s possible for our society to reconcile our understanding of justice with scientific understanding of human behaviour.

Why do humans, most likely, have no free will? How does that link to depression and other psychiatric disorders? Can people accept the idea that there is no free will and start using, what science tells us about the reasons behind our behaviour, as a basis for making sense of justice and morality? If yes, can we even imagine what such society would look like?

Continue reading “Robert Sapolsky: Justice and morality in the absence of free will” »

Oct 6, 2023

How purposeless physics underlies purposeful life

Posted by in categories: biological, physics

Radical theory explains how physics creates all biology’s complexity.

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