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Archive for the ‘biological’ category: Page 153

Aug 19, 2019

The physics of cell-size regulation across timescales

Posted by in categories: biological, physics

The size of a cell is determined by a combination of synthesis, self-assembly, incoming matter and the balance of mechanical forces. Such processes operate at the single-cell level, but they are deeply interconnected with cell-cycle progression, resulting in a stable average cell size at the population level. Here, we examine this phenomenon by reviewing the physics of growth processes that operate at vastly different timescales, but result in the controlled production of daughter cells that are close copies of their mothers. We first review the regulatory mechanisms of size at short timescales, focusing on the contribution of fundamental physical forces. We then discuss the multiple relevant regulation processes operating on the timescale of the cell cycle. Finally, we look at how these processes interact: one of the most important challenges to date involves bridging the gap between timescales, connecting the physics of cell growth and the biology of cell-cycle progression.

Aug 18, 2019

The Toxic Blue-Green Algae Responsible For Killing Dogs Around The U.S. Has Been Found In Nevada

Posted by in category: biological

Listen up, pet owners! Earlier this summer, several dogs in North Carolina, Georgia, and Texas perished after coming into contact with toxic blue-green algae. Although this may seem pretty far from home, it’s really a countrywide problem. The same toxic algae has even been spotted in Nevada, so you’ll definitely want to be on the lookout for this nasty stuff. Not only can it cause a variety of symptoms in humans, but it’s considered deadly for animals. Keep reading and learn how you can keep an eye out for algal blooms and keep your pets safe during your adventures.

Had you heard about this toxic blue-green algae that’s already killed several dogs this year? This stuff definitely isn’t to be taken lightly.

Aug 17, 2019

Samsung Releasing Smartphone Using Graphene Battery for 15–30 Minute Charging in 2020

Posted by in categories: biological, engineering, mobile phones, transportation

Samsung will release a smartphone using new fast chargoing graphene battery technology that can fully charge in under 30 minutes according to gadgets leaker Evan Blass (@EVLeaks).

Samsung will release a smartphone powered by new graphene battery technology that can fully charge in under 30 minutes in 2020, or possibly 2021. This will be three to five times faster than today’s lithium-ion batteries which take about 90 minutes to charge.

In 2017, Samsung Advanced Institute of Technology (SAIT) announced they had developed a “graphene ball,” a unique battery material that enables a 45% increase in capacity, and five times faster-charging speeds than standard lithium-ion batteries. The breakthrough provides promise for the next generation secondary battery market, particularly related to mobile devices and electric vehicles. In its research, SAIT collaborated closely with Samsung SDI as well as a team from Seoul National University’s School of Chemical and Biological Engineering.

Aug 16, 2019

Ronald Kohanski, PhD

Posted by in categories: biological, life extension

Click on photo to start video.

Ronald Kohanski, PhD. is the Deputy Director of the Division of Aging Biology at the National Institute on Aging, and he gave the keynote for day two of our recent conference in New York City.

Aug 12, 2019

5 Reasons Jeff Bezos Should Bet Big On Synthetic Biology

Posted by in categories: bioengineering, biological, space

Jeff Bezos speaking at the grand opening of the Amazon Spheres, a new glass dome conservatory at the company’s Seattle headquarters. If going to space is vital for a thriving civilization, then we had better develop the synthetic biology tools and tech to enable it.

Aug 11, 2019

Scientists Are Testing Whether Bacteria Could Help Them Mine The Riches of Space

Posted by in categories: biological, space

Astrobiologists have sent 18 different strains of bacteria up to the International Space Station.

They’re not meant to contaminate the already-kinda-gross orbital research center, but rather to determine whether the mineral-leaching microbes could help astronauts mine space rocks during future missions, Space.com reports.

If the so-called BioRock experiment pans out, the researchers behind the experiment argue that it could help humanity turn space rocks on the Moon or Mars into farmable soil for future human settlements.

Aug 7, 2019

Crashed spacecraft may have left creatures on the moon

Posted by in categories: astronomy, biological, science, space, space travel

Continue reading “Crashed spacecraft may have left creatures on the moon” »

Aug 7, 2019

Mouse Genetics Shape the Gut Microbiome More than Their Environment

Posted by in categories: biological, genetics

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Genetics hold far more sway over the mouse microbiome than transient environmental exposures, researchers reported July 26 in Applied and Environmental Microbiology. The results appear to contradict previous studies in humans that have found environmental factors to be more influential than genetics, and they add to an ongoing dialogue in the microbiome research community over how much control we hold over the bacterial communities in our guts.

Hila Korach-Rechtman, a microbiologist at the Israel Institute of Technology in Haifa, set out to identify the microbes in mice that become a fixture in the gut after being introduced through the environment. “We really wanted to find these bacteria that can be transferred and remain in the host, even though they have different genetics,” she says.

Aug 5, 2019

We contain microbes so deeply weird they alter the very tree of life

Posted by in categories: biological, cosmology, health

Newly discovered life forms inside our bodies profoundly affect our health – and provide a glimpse of the vast and mysterious biological “dark matter” within us.

Aug 5, 2019

Synthesizing single-crystalline hexagonal graphene quantum dots

Posted by in categories: biological, engineering, nanotechnology, quantum physics

A KAIST team has designed a novel strategy for synthesizing single-crystalline graphene quantum dots, which emit stable blue light. The research team confirmed that a display made of their synthesized graphene quantum dots successfully emitted blue light with stable electric pressure, reportedly resolving the long-standing challenges of blue light emission in manufactured displays. The study, led by Professor O Ok Park in the Department of Chemical and Biological Engineering, was featured online in Nano Letters on July 5.

Graphene has gained increased attention as a next-generation material for its heat and electrical conductivity as well as its transparency. However, single and multi-layered graphene have characteristics of a conductor so that it is difficult to apply into semiconductor. Only when downsized to the nanoscale, semiconductor’s distinct feature of bandgap will be exhibited to emit the light in the graphene. This illuminating featuring of dot is referred to as a graphene quantum dot.

Conventionally, single-crystalline graphene has been fabricated by chemical vapor deposition (CVD) on copper or nickel thin films, or by peeling graphite physically and chemically. However, graphene made via is mainly used for large-surface transparent electrodes. Meanwhile, graphene made by chemical and physical peeling carries uneven size defects.