Archive for the ‘chemistry’ category: Page 4

Aug 28, 2021

Calling Through the DNA Wire: A Newly Discovered Genetic “Switch”

Posted by in categories: biotech/medical, chemistry, genetics

Proteins can communicate through DNA, conducting a long-distance dialogue that serves as a kind of genetic “switch,” according to Weizmann Institute of Science researchers. They found that the binding of proteins to one site of a DNA molecule can physically affect another binding site at a distant location, and that this “peer effect” activates certain genes. This effect had previously been observed in artificial systems, but the Weizmann study is the first to show it takes place in the DNA of living organisms.

A team headed by Dr. Hagen Hofmann of the Chemical and Structural Biology Department made this discovery while studying a peculiar phenomenon in the soil bacteria Bacillus subtilis. A small minority of these bacteria demonstrate a unique skill: an ability to enrich their genomes by taking up bacterial gene segments scattered in the soil around them. This ability depends on a protein called ComK, a transcription factor, which binds to the DNA to activate the genes that make the scavenging possible. However, it was unknown how exactly this activation works.

Aug 26, 2021

Dust-sized supercapacitor has voltage of AAA battery

Posted by in categories: biotech/medical, chemistry, nanotechnology

Devices in the submillimetre range – so-called “nano-supercapacitors” – allow the shrinkage of electronic components to tiny dimensions. However, they are difficult to produce and do not usually incorporate biocompatible materials. Corrosive electrolytes, for example, can quickly discharge themselves in the event of defects and contamination.

So-called “biosupercapacitors” (BSCs) offer a solution. These have two outstanding properties: full biocompatibility, which means they can be used in body fluids such as blood, and compensation for self-discharge behaviours through bio-electrochemical reactions. In other words, they can actually benefit from the body’s own reactions. This is because, in addition to typical charge storage reactions of a supercapacitor, redox enzymatic reactions and living cells naturally present in the blood can increase the performance of a device by 40%.

Shrinking these devices down to submillimetre sizes, while maintaining full biocompatibility, has been enormously challenging. Now, scientists have created a prototype that combines both essential properties.

Aug 26, 2021

Dr. Harold Katcher, PhD — Chief Scientific Officer — Yuvan Research — Rejuvenative Plasma Fractions

Posted by in categories: biotech/medical, chemistry, genetics, life extension

Studying Novel Plasma Fractions For Age-Related Diseases And Systemic Rejuvenation — Dr. Harold Katcher Ph.D., Chief Scientific Officer, Yuvan Research Inc.

Dr. Harold Katcher is the Chief Scientific Officer at Yuvan Research Inc., a biotech company exploring the development of novel, young plasma fraction rejuvenation treatments in mammals.

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Aug 25, 2021

Dr. Hanadie Yousef, Ph.D. Co-Founder & CEO — Juvena Therapeutics — Secretome Derived Therapies

Posted by in categories: biotech/medical, chemistry, life extension

Secretome Derived Regenerative Therapeutics — Dr. Hanadie Yousef Ph.D., Co-Founder & CEO, Juvena Therapeutics

Dr. Hanadie Yousef, Ph.D. is a Scientist, Co-Founder and CEO of Juvena Therapeutics (https://www.juvenatherapeutics.com/), a regenerative medicine company developing protein therapeutics to promote tissue regeneration and increase healthspan, to prevent, reverse, and cure degenerative diseases.

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Aug 25, 2021

In a first, scientists capture a ‘quantum tug’ between neighboring water molecules

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

Water is the most abundant yet least understood liquid in nature. It exhibits many strange behaviors that scientists still struggle to explain. While most liquids get denser as they get colder, water is most dense at 39 degrees Fahrenheit, just above its freezing point. This is why ice floats to the top of a drinking glass and lakes freeze from the surface down, allowing marine life to survive cold winters. Water also has an unusually high surface tension, allowing insects to walk on its surface, and a large capacity to store heat, keeping ocean temperatures stable.

Now, a team that includes researchers from the Department of Energy’s SLAC National Accelerator Laboratory, Stanford University and Stockholm University in Sweden have made the first direct observation of how in water tug and push neighboring water molecules when they are excited with laser light. Their results, published in Nature today, reveal effects that could underpin key aspects of the microscopic origin of water’s strange properties and could lead to a better understanding of how water helps proteins function in living organisms.

“Although this so-called nuclear quantum effect has been hypothesized to be at the heart of many of water’s strange properties, this experiment marks the first time it was ever observed directly,” said study collaborator Anders Nilsson, a professor of chemical physics at Stockholm University. “The question is if this quantum effect could be the missing link in theoretical models describing the anomalous properties of water.”

Aug 25, 2021

Revolution in biomedicine using emerging of picomaterials: A breakthrough on the future of medical diagnosis and therapy

Posted by in categories: biotech/medical, chemistry, quantum physics

Pico technology is hypothetical future level of technology which will revolutionized the scientist world. This technology is combination of pico and meter with scale of trillionths of a meter (10−12). This atomic and subatomic range particles reveals extraordinary properties and pave the way for tremendous applications [1].

The way lengths and angles attach together is the main determine of the materials properties. Alterable or reversible bonds distortions at pico-meter scale which changes the electronic conformation causes multiple properties for materials.

On the other hand, pico-scale particles changes the material properties by converting energy state of electrons within an atom. Physical and chemical properties of systems such as melting point, fluorescence, electrical conductivity, magnetic permeability, and chemical reactivity changes basically at pico-scale due to quantum effects of materials [2]. Moreover, surface energy of atoms increases by alternation of electron distribution and therefore, enhances protein and molecules adsorption on to materials. This privileges will resulting in tracing proteins, DNA and molecules and labeling them for various purpose.

Aug 24, 2021

Prozac Changes Fat Composition of the Brain

Posted by in categories: biotech/medical, chemistry, neuroscience

Lipids are abundant in the brain, where they are found not just in the cell membranes of neurons, whose properties they modulate, but also in the so-called myelin sheaths insulating axons — the brain’s ‘wiring.’ The brain is therefore a surprisingly ‘fat’ organ — in fact, it is nearly 60% fat, the study’s first author, Anna Tkachev from Skoltech, said.

Summary: Prozac reduced polyunsaturated fatty acid lipid concentrations in the brains of juvenile macaque monkeys.

Source: Skoltech

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Aug 22, 2021

Introduction to Biochemistry

Posted by in categories: biotech/medical, chemistry

#Biology #biochemistry #Biochemist #biotech #bio

This video explains introduction to biochemistry.

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Aug 22, 2021

Scientists re-create what may be life’s first spark

Posted by in categories: chemistry, space

Circa 2014

Scientists in a lab used a powerful laser to re-create what might have been the original spark of life on Earth.

The researchers zapped clay and a chemical soup with the laser to simulate the energy of a speeding asteroid smashing into the planet. They ended up creating what can be considered crucial pieces of the building blocks of .

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Aug 22, 2021

3D Printing Liquid Crystal

Posted by in categories: 3D printing, chemistry

If you think at all about liquid crystals, you probably think of display technology. However, researchers have worked out a way to use an ink-jet-like process to 3D print iridescent colors using a liquid crystal elastomer. The process can mimic iridescent coloring found in nature and may have applications in things as diverse as antitheft tags, art objects, or materials with very special optical properties.

For example, one item created by the team is an arrow that only appears totally green when viewed from a certain angle. The optical properties depend on the thickness of the material which, being crystalline, self-organizes. Controlling the speed of deposition changes the thickness of the material which allows the printer to tune its optical properties.

The ink doesn’t sound too exotic to create, although the chemicals in it are an alphabet soup of unpronounceable organic compounds. At least they appeared available if you know where to shop for exotic chemicals.

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