Feed aggregator

Old Scientist: Nominative determinism through the ages

Genetically modified organisms (GMO) - Sun, 2018-05-20 09:00
It has been done to death since the 1990s but it is the gift that keeps on giving, as a look back through the archives of New Scientist shows
Categories: Science and society

What Is Real? A tale of how big egos hijacked quantum physics

Genetically modified organisms (GMO) - Sat, 2018-05-19 12:00
The quantum story is all brilliant insights, flawed male scientists – and few female ones. To progress, we may need to dump our prejudices, says a new book
Categories: Science and society

What Is Real? A tale of how big egos hijacked quantum physics

Genetics - Sat, 2018-05-19 12:00
The quantum story is all brilliant insights, flawed male scientists – and few female ones. To progress, we may need to dump our prejudices, says a new book
Categories: Biology

Treadmilling analysis reveals new insights into dynamic FtsZ ring architecture

PLOS Biology (new articles) - Fri, 2018-05-18 23:00

by Diego A. Ramirez-Diaz, Daniela A. García-Soriano, Ana Raso, Jonas Mücksch, Mario Feingold, Germán Rivas, Petra Schwille

FtsZ, the primary protein of the bacterial Z ring guiding cell division, has been recently shown to engage in intriguing treadmilling dynamics along the circumference of the division plane. When coreconstituted in vitro with FtsA, one of its natural membrane anchors, on flat supported membranes, these proteins assemble into dynamic chiral vortices compatible with treadmilling of curved polar filaments. Replacing FtsA by a membrane-targeting sequence (mts) to FtsZ, we have discovered conditions for the formation of dynamic rings, showing that the phenomenon is intrinsic to FtsZ. Ring formation is only observed for a narrow range of protein concentrations at the bilayer, which is highly modulated by free Mg2+ and depends upon guanosine triphosphate (GTP) hydrolysis. Interestingly, the direction of rotation can be reversed by switching the mts from the C-terminus to the N-terminus of the protein, implying that the filament attachment must have a perpendicular component to both curvature and polarity. Remarkably, this chirality switch concurs with previously shown inward or outward membrane deformations by the respective FtsZ mutants. Our results lead us to suggest an intrinsic helicity of FtsZ filaments with more than one direction of curvature, supporting earlier hypotheses and experimental evidence.
Categories: Biology, Journals

Grape skins and stems can be turned into a greener plastic

Genetics - Fri, 2018-05-18 21:35
Someday you might buy wine in a plastic bottle made from the same grapes. Their skins, stems, and seeds can be used to make plastic that lasts longer
Categories: Biology

Grape skins and stems can be turned into a greener plastic

Genetically modified organisms (GMO) - Fri, 2018-05-18 21:35
Someday you might buy wine in a plastic bottle made from the same grapes. Their skins, stems, and seeds can be used to make plastic that lasts longer
Categories: Science and society

Grape skins and stems can be turned into a greener plastic

HIV and AIDS - Fri, 2018-05-18 21:35
Someday you might buy wine in a plastic bottle made from the same grapes. Their skins, stems, and seeds can be used to make plastic that lasts longer

Stunning first image sent back by NASA’s planet-hunter satellite

Genetics - Fri, 2018-05-18 20:46
The beauty of the skies is on display in this incredible image, the first sent back by NASA’s Transiting Exoplanet Survey Satellite on its way past the moon
Categories: Biology

Stunning first image sent back by NASA’s planet-hunter satellite

Genetically modified organisms (GMO) - Fri, 2018-05-18 20:46
The beauty of the skies is on display in this incredible image, the first sent back by NASA’s Transiting Exoplanet Survey Satellite on its way past the moon
Categories: Science and society

Stunning first image sent back by NASA’s planet-hunter satellite

HIV and AIDS - Fri, 2018-05-18 20:46
The beauty of the skies is on display in this incredible image, the first sent back by NASA’s Transiting Exoplanet Survey Satellite on its way past the moon

Halo Jones: return of the 50th-century galactic adventurer

Genetics - Fri, 2018-05-18 20:00
One of the great comic book characters of all time, and a pioneer for all women who seek powerful roles, gets a new lease of life
Categories: Biology

Halo Jones: return of the 50th-century galactic adventurer

Genetically modified organisms (GMO) - Fri, 2018-05-18 20:00
One of the great comic book characters of all time, and a pioneer for all women who seek powerful roles, gets a new lease of life
Categories: Science and society

An AI can now tell how malnourished a child is just from a photo

Genetics - Fri, 2018-05-18 18:06
A company in Kenya has devised a system that uses artificial intelligence to detect a child’s level of malnutrition from a photo, without bulky equipment or examinations
Categories: Biology

An AI can now tell how malnourished a child is just from a photo

Genetically modified organisms (GMO) - Fri, 2018-05-18 18:06
A company in Kenya has devised a system that uses artificial intelligence to detect a child’s level of malnutrition from a photo, without bulky equipment or examinations
Categories: Science and society

An AI can now tell how malnourished a child is just from a photo

HIV and AIDS - Fri, 2018-05-18 18:06
A company in Kenya has devised a system that uses artificial intelligence to detect a child’s level of malnutrition from a photo, without bulky equipment or examinations

Can a repeat of disastrous Ebola epidemic be averted this time?

Genetics - Fri, 2018-05-18 17:45
The latest outbreak of the deadly virus has spread to a city of a million people in the Democratic Republic of Congo. But hopes are high disaster can be avoided
Categories: Biology

Can a repeat of disastrous Ebola epidemic be averted this time?

Genetically modified organisms (GMO) - Fri, 2018-05-18 17:45
The latest outbreak of the deadly virus has spread to a city of a million people in the Democratic Republic of Congo. But hopes are high disaster can be avoided
Categories: Science and society

Can a repeat of disastrous Ebola epidemic be averted this time?

HIV and AIDS - Fri, 2018-05-18 17:45
The latest outbreak of the deadly virus has spread to a city of a million people in the Democratic Republic of Congo. But hopes are high disaster can be avoided

Upend atom! We’ve found a whole new way of doing chemistry

Genetics - Fri, 2018-05-18 14:00
We thought we knew how molecules worked – but the discovery of an entirely unknown class of reactions has forced us to rethink the basics
Categories: Biology

New algorithm can help spot faked photos before they go viral

Genetics - Fri, 2018-05-18 14:00
Faked pictures can make very powerful propaganda if they get widely shared. A new algorithm aims to weed out doctored images before they spread
Categories: Biology