Last update The dynamic cytoskeleton in bacterial cell division, 18 hours ago
(Phys.org) —The cytoskeletal proteins of eukaryotes polymerize into self-organized patterns even as pure solutions. However, to see more complex dynamics, like filament sliding or rotation, various motor ...
18 hours ago
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When scientists at Pacific Northwest National Laboratory took samples of a microbial mat community from a hypersaline lake to study community responses to environmental changes, they expected to find that ...
20 hours ago
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The genome of viruses is usually enclosed inside a shell called capsid. Capsids have unique mechanic properties: they have to be resistant and at the same time capable of dissolving in order to release the ...
21 hours ago
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When attacking body cells, bacteria, such as salmonellae or Yersinia (plague pathogens), inject specific bacterial proteins through hollow, syringe-like structures – called injectisomes – into the host ...
Dec 09, 2013
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(Phys.org) —As embryonic tissue develops, cells push and pull on each other, and they must do so correctly for the tissue to develop properly. Now scientists at Harvard University have devised the first ...
Dec 09, 2013
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NASA and the Center for the Advancement of Science in Space (CASIS) are enabling research aboard the International Space Station that could lead to new stem cell-based therapies for medical conditions faced on Earth and in ...
Dec 09, 2013
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Bacteria may lack a true immune system, but this does not leave them defenseless against bacteriophage viruses and other pathogens. A system of genomic sequence elements called clustered regularly interspaced ...
Dec 06, 2013
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In an important scientific breakthrough in regenerative medicine, researchers at A*STAR's Genome Institute of Singapore have successfully converted human embryonic stem cells (hESCs) cultured in the laboratory to a state ...
Dec 06, 2013
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Female mosquitoes, which can transmit deadly diseases like malaria, dengue fever, West Nile virus and filariasis, are attracted to us by smelling the carbon dioxide we exhale, being capable of tracking us ...
Dec 05, 2013
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Yeast has a somewhat complicated love life: on the one hand, a mother cell can produce genetically identical daughter cells through mitosis (cell division); on the other hand, yeast cells, who exist in two different mating ...
Dec 05, 2013
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Genomes must be replicated in two copies during cell division. This process occurs at structures called 'replication forks', which are equipped with enzymes and move along the separated DNA strands. In tumour ...
Dec 05, 2013
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A new method to identify previously hidden details about the structures of proteins may speed the process of novel drug design, according to scientists at Rice University.
Dec 05, 2013
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For what is believed to be the first time, researchers at The Johns Hopkins University have illuminated the inner workings of an important class of enzymes located inside the outer envelopes of cells. Much ...
Dec 05, 2013
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Eating DNA sounds scary but it's completely safe. I do it every day. Let me explain.
Dec 05, 2013
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A protein called Tet1 is partly responsible for giving primordial germ cells a clean epigenetic slate before developing into sperm and egg cells, according to a new study by researchers at Boston Children's Hospital. This ...
Dec 04, 2013
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With few exceptions, cells don't change type once they have become specialized—a heart cell, for example, won't suddenly become a brain cell. However, new findings by researchers at UC Santa Barbara have ...
Dec 04, 2013
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In a technical tour de force, UC San Francisco (UCSF) scientists have determined, at near-atomic resolution, the structure of a protein that plays a central role in the perception of pain and heat.
Dec 04, 2013
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A specific ratio of DNA packaging proteins ensures normal gene expression during early embryonic development.
Dec 04, 2013
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Elsevier, EuroStemCell, and Kyoto University's Institute for Integrated Cell-Material Sciences (iCeMS), today released "Stem Cell Research report: Trends and Perspectives on the Evolving International Landscape" at the World ...
Dec 04, 2013
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Understanding how bacteria adapt so quickly to changes in their external environment with continued high growth rates is one of the major research challenges in molecular microbiology. This is important not least for our ...
Dec 02, 2013
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The small intestine, like most other body tissues, has a small store of immature adult stem cells that can differentiate into more mature, specialized cell types. Until now, there has been no good way to ...
Dec 02, 2013
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In the arms race between bacteria and modern medicine, bacteria have gained an edge. In recent decades, bacterial resistance to antibiotics has developed faster than the production of new antibiotics, making ...
Dec 02, 2013
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The division of labor is more efficient than a struggle through life without help from others – this is also true for microorganisms. Researchers from Research Group Experimental Ecology and Evolution at ...
Dec 02, 2013
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Scientists at The Scripps Research Institute (TSRI) have determined the most detailed picture yet of a crucial part of the hepatitis C virus, which the virus uses to infect liver cells. The new data reveal ...
Nov 28, 2013
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Scientists are a step closer to understanding how some of the brain's 100 billion nerve cells co-ordinate their communication. The study is published today in the journal Cell Reports.
Nov 27, 2013
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(Phys.org) —A new study by researchers at the University of California, Davis, and in Mali finds that many of the assumptions underlying current thinking about the genetics of two key subgroups of malaria ...
Researchers at Waseda University in Japan have for the first time directly observed the "molecular motor", called Xkid, that plays a critical role in facilitating the proper alignment of chromosomes during ...
(Phys.org) —It's widely accepted that terroir—the unique blend of a vineyard's soils, water and climate—sculpts the flavor and quality of wine. Now a new study led by UC Davis researchers offers evidence ...
A method by Rice University researchers to model the way proteins fold – and sometimes misfold – has revealed branching behavior that may have implications for Alzheimer's and other aggregation diseases.
Cyanobacteria, found in just about every ecosystem on Earth, are one of the few bacteria that can create their own energy through photosynthesis and "fix" carbon – from carbon dioxide molecules – and ...
As coastal communities continue to rebuild in the wake of Hurricane Sandy, scientists at this week's annual meeting of the American Geophysical Union offer some encouraging news: the storm did not seriously ...
It's your 150th day in space, and life is starting to resemble the movie "Groundhog Day"—a repetitive daily routine interspersed with tugs of longing for life back on Earth.
Many of the world's leading tech companies call Ireland home, providing a boost for the cash-strapped nation but huge employment opportunities are being missed as Ireland marks the end of its bailout on Sunday.
Alan Alda, the actor-turned-part-time professor, has a new question for scientists to consider: How do you explain color to an 11-year-old?
(Phys.org) —When a rubber ball and a droplet of water are compressed onto a solid surface, they behave very differently. For the ball, the compression process is reversible, so the ball retains its original ...
A law under consideration in South Korea's parliament has sparked vociferous debate by grouping popular online games such as "StarCraft" with gambling, drugs and alcohol as an anti-social addiction the government should do ...
Japan is planning to earmark 100 billion yen ($970 million) for a storage facility for tens of thousands of tonnes of soil contaminated with radiation from the Fukushima disaster, a report said Wednesday.
The US Supreme Court on Tuesday heard arguments on environmental rules aiming to reduce smog that drifts from one state to another.
When he sees people listening to music on portable digital devices, David Chesky cringes.
You're shopping for holiday gifts when you spot someone pocketing a nice pair of leather gloves. What do you do?
Retroviruses are important pathogens capable of crossing species barriers to infect new hosts, but knowledge of their evolutionary history is limited. By mapping endogenous retroviruses (ERVs), retroviruses whose genes have ...
(Phys.org) —In research published today in Nature Cell Biology, scientists from the EMBL Australia research team based at Monash University's Australian Regenerative Medicine Institute (ARMI) have reveal ...
It turns out that your messenger RNA may catch more than one ride to get where it's going.
Garlic may be bad for your breath, but it's good for your baby, according to a new study from the University of British Columbia.
Viruses are as simple as they are "smart": too elementary to be able to reproduce by themselves, they exploit the reproductive "machinery" of cells, by inserting pieces of their own DNA so that it is transcribed ...
A molecular technique that will help the scientific community to analyze—on a scale previously impossible—molecules that play a critical role in regulating gene expression has been developed by a research team led by ...
Scientists have figured out how calcium channels – the infinitesimal cell membrane pores that generate electrical signals by gating a charged-particle influx – have solved a "needle in a haystack" problem.
Viruses cannot only cause illnesses in humans, they also infect bacteria. Those protect themselves with a kind of 'immune system' which – simply put – consists of specific sequences in the genetic material ...
A shipment of highly radioactive cobalt-60 is still sitting in the cornfield where it was found a week ago after being abandoned by thieves in central Mexico, the country's nuclear safety director said Tuesday.
(Phys.org) —NASA's Mars Reconnaissance Orbiter has revealed to scientists slender dark markings—possibly due to salty water - that advance seasonally down slopes surprisingly close to the Martian equator.
HIV causes structural heart disease according to research presented at EuroEcho-Imaging 2013 by Dr Nieves Montoro from Madrid, Spain. The findings support the introduction of cardiovascular screening in all ...
Vets in Japan have carried out knee surgery on a rare white tiger cub, fixing a leg problem the animal had been born with.
Federal safety officials say the technology known as positive train control would probably have prevented the Dec. 1 train derailment that killed four people in New York.
A Dutch entrepreneur's bold quest to colonize Mars won high-profile support Tuesday from a US aerospace giant, although the timetable for putting humans on the red planet has been pushed back two years.
US police arrested a 27-year-old man Tuesday accused of running a "revenge porn" website hosting over 10,000 sexually explicit photos as part of an extortion ploy, officials said.
Conservationists on Wednesday slammed Australia's approval for an Indian firm to expand a major coal port on the Great Barrier Reef coast, warning it would hasten the natural wonder's demise.
(Phys.org) —When NASA's Juno spacecraft flew past Earth on Oct. 9, 2013, it received a boost in speed of more than 8,800 mph (about 7.3 kilometer per second), which set it on course for a July 4, 2016, ...
When soup is heated, it starts to boil. When time and space are heated, an expanding universe can emerge, without requiring anything like a "Big Bang". This phase transition between a boring empty space and ...
A Pakistani doctor won a $1 million grant on Tuesday to fight early child mortality in a small fishing village in southern Pakistan in a contest financed by an American entrepreneur to find innovative ways ...
(Phys.org) —Randy Schekman winner (with colleagues) of the Nobel Prize this year in the Physiology or Medicine category for his work that involved describing how materials are carried to different parts ...
A groundbreaking study by Harvard University's Harvard Forest and the Smithsonian Institution reveals that, if left unchecked, recent trends in the loss of forests to development will undermine significant land conservation ...
(Phys.org) —If recent news that University of Alabama in Huntsville (UAH) researchers observed the largest gamma ray burst ever has you nervous about getting blasted into extinction by a massive burst from ...
Comet ISON, once optimistically called the comet of the century, is dead, the victim of a way-too-close brush with the sun. It was barely a year old.
(Phys.org) —To date, the 3D printing revolution has focused on the use of plastics – cheap printers' feedstock and high throughput. Until now 3D printing with metal has been prohibitively expensive because ...
Researchers at the University of Copenhagen have unveiled a profound biological process that explains how DNA can be damaged during genome replication. In addition, the scientists developed a new analytical tool to measure ...
In what is anticipated to be a major step forward for rare disease research, The New York Stem Cell Foundation (NYSCF) Research Institute is partnering with the National Institutes of Health (NIH) Undiagnosed Disease Program ...
A foundational study published in the journal PNAS (Proceedings of the National Academy of Sciences) this week by researchers at the University of Toronto's Institute of Biomaterials & Biomedical Engineering (IBBME) and t ...
Every day, the human body produces new cells to regenerate tissues and repair those that have suffered injury. Each time this happens, the cells make copies of their DNA that they will pass on to the resulting daughter cells. ...
Hidden underneath the hilly grasslands studded with ocotillos and mesquite trees in southeastern Arizona lies a world shrouded in perpetual darkness: Kartchner Caverns, a limestone cave system renowned for ...
Solar power, only a minuscule part of the energy mix in the United States, is getting a boost from cheap panels, growing acceptance by large companies and chances for homeowners to rent solar systems.
Life on Earth or Mars could have been brought to the moons of Jupiter or Saturn on rocks blasted off those planets, researchers say.
An international research team has analysed two of the earth's mass extinction events, finding markedly similar conditions between the two.
In 1972 a group of scientists, known collectively as the Club of Rome, constructed a detailed mathematical model to test whether population growth and economic development could continue indefinitely and ...
(Phys.org) —Thousands of amateur (ham) radio operators around the world were able to say "Hi" to NASA's Juno spacecraft Oct. 9 as it swung past Earth on its way to Jupiter.
(Phys.org) —With one stomp of his foot, Zhong Lin Wang illuminates a thousand LED bulbs – with no batteries or power cord. The current comes from essentially the same source as that tiny spark that jumps ...
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