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| Biology articles |
One bacteria stops another on contact
Scientists have discovered a new phenomenon in which one bacterial cell can stop the growth of another on physical contact. The bacteria that stop growing may go into a dormant state, rather than dying. The findings have implications for management of chronic diseases, such as urinary tract infections.
:Study reveals a way disease bacteria sense antimicrobials and initiate a counter-defense
Scientists have discovered a new phenomenon in which one bacterial cell can stop the growth of another on physical contact. The bacteria that stop growing may go into a dormant state, rather than dying. The findings have implications for management of chronic diseases, such as urinary tract infections.
How do otters remain sleek and warm
Otters cavorting in the water is a scene with which we're all familiar. Yet, unlike many other mammals that spend a considerable amount of time in the waterpolar bears, seals, dolphins, and whalesriver otters do not have a thick layer of body fat to keep warm. They rely, instead, on a few unique adaptations; namely, their fur and the densely packed layer of specially adapted underhairs.
Simple sea sponge helps scientists understand tissue rejection
Understanding why some transplant patients reject their new organs requires a working knowledge of how cells recognize and accept or reject each other. Xavier Fernàndez-Busquets, an MBL researcher visiting from the University of Barcelona, has found the perfect ally in this quest: the red beard sea sponge, an Atlantic species that grows abundantly from just north of Cape Cod down to Florida.
Microbe has huge role in ocean life, carbon cycle
Researchers at Oregon State University and Diversa Corporation have discovered that the smallest free-living cell known also has the smallest genome, or genetic structure, of any independent cell - and yet it dominates life in the oceans, thrives where most other cells would die, and plays a huge role in the cycling of carbon on Earth.
Long sought-after flowering signal found
A breakthrough in understanding how flowers form, is reported by scientists at the Max Planck Institute for Developmental Biology in Tuebingen, Germany, and the John Innes Centre in Norwich, UK. In an article published in the international journal "Science", they show how a small molecule that is made in leaves is able to induce the formation of flowers at the growing tip of a plant. Because flowers in turn make fruits and seeds, including cereal grains, this new knowledge could have important applications in crop plants.
Cultural norms not unique to human societies
Humans are not alone in their desire to conform to cultural norms, according to new study findings that confirm, for the first time, chimpanzees share the same conformist tendencies.
Analysis of flower genes reveals the fate of an ancient gene duplication
In a step that advances our ability to discern the ancient evolutionary relationships between different genes and their biological functions, researchers have provided insight into the present-day outcome of a single gene duplication that occurred over a hundred million years ago in an ancestor of modern plants.
Public collections of DNA and RNA sequence reach 100 gigabases
The world's three leading public repositories for DNA and RNA sequence information have reached 100 gigabases [100,000,000,000 bases; the 'letters' of the genetic code] of sequence.
Bacteria are key to 'green' plastics, drugs
Trials have begun in Kansas on a "green" production method for succinate, a key ingredient of many plastics, drugs, solvents and food additives. Developed at Rice University, the technology uses a genetically modified form of the bacteria E. coli that metabolizes glucose and produces almost pure succinate.
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New look at DNA hints at origin of ultraviolet damage
Chemists at Ohio State University have gained new insight into how sunlight affects DNA. And what they found overturns ideas about genetic mutation that originated decades ago.
Scientist discover hormone that causes malaria mosquito to urinate
Prior to coming to Nevada 16 years ago, David Schooley was a key figure at a small company in Palo Alto, Calif. that developed methoprene, an insecticide that halts the maturation of insect larvae to adults.
Long-sought flower-inducing molecule found
Researchers at the Umeć Plant Science Centre at the Swedish University of Agricultural Sciences (SLU), Sweden, report about a breakthrough in our understanding of how plants control their flowering.
Caloric restriction won't dramatically extend life span in humans
Severely restricting calories over decades may add a few years to a human life span, but will not enable humans to live to 125 and beyond, as many have speculated, evolutionary biologists report.
Chimp genome helps scientists learn more about human DNA
Comparing the human genome to the chimpanzee genome has allowed scientists to identify changes in the human genetic code that were so advantageous that they rapidly became the norm throughout humanity.
Cows show promise as powerplants
A new study suggests that some of the microorganisms found in cow waste may provide a reliable source of electricity.
Dangerous tricksters
Macrophages are effective weapons used by our immune system to absorb and digest pathogenic intruders. Some bacteria, however, can subvert this defence mechanism and even multiply within the macrophages.
Using computers and dna to count bacteria
Don't call them the Dirt Doctors, or Sultans of Soil, they're just clever Lab guys. A team from Los Alamos National Laboratory has a paper in this week's Science Magazine with a new way to count bugs in dirt. Bacteria, that is, in the highly complex world beneath our feet.
Anthrax stops body from fighting back
University of Florida researchers have uncovered how the inhaled form of anthrax disarms bacteria-fighting white blood cells before they can fend off the disease, which kills most victims within days.
Nanotechnology confronts the "bad hair day," tests new conditioner
Ohio State University researchers have just completed the first comprehensive study of human hair on the nanometer level.
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| Quotes | By convention!
cussed Tom airily.
Cmon Scully... Itll be a nice trip through the woods-Fox Mulder
But what ... is it good for?
Engineer at IBM, 1968, commenting on the microchip.
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