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Tag: "structures" at biology news

Metal-containing compounds show promise as HIV weapon

...he diffraction data to UT Southwestern to have the structures interpreted. The structures were determined by a process called X-ray crystallography, in which the crystals are bombarded with ...

What Makes The Brain Tick, Tick, Tick: Researchers Gaining New Insights Into Brain's Internal Clock

...icate interval timing machine, in which individual structures busy with their own neural tasks, generate resonances that integrate to become ticks of the neural clock. Meck, Buhusi and their clockwork colleagues are using an array of experimental techniques to try to identify this "baton" timing signal and to ...

New research puts a fresh spin on current thinking of speech evolution in humans

... thinking that speech developed as a result of new structures that evolved in the human brain. Dr. Petrides and colleagues have identified a distinct brain region that controls jaw movements in macaque monkeys that is comparable to Broca's area - the region in the human brain critical for speech production. Thi...

Purdue's gold nanorods brighten future for medical imaging

...anorods into mice and then took images of the tiny structures as the nanorods flowed through blood vessels in the animals' ears. Individual nanorods proved to be 58 times brighter than the two-photon fluorescence from a single rhodamine molecule. Within a half hour after being injected, the nanorods could no lo...

Scientists crack 40-year-old DNA puzzle and point to 'hot soup' at the origin of life

... old simple code hidden away in our DNA and in the structures of our cells," said Dr van den Elsen, who points to several aminoacyl-tRNA synthetases - molecules involved in protein synthesis - which only look at pairs of bases in triplet codons, as well as other physical evidence in support of the theory. "As ...

Study provides insight into cellular defenses against genetic mutation

... is coverted into proteins that make up the body's structures and carry out its functions. While genetic instructions are stored in chains of deoxyribonucleic acids (DNA), they are put into practice by ribonucleic acids (RNA). Messenger RNA (mRNA), a modified copy of DNA, is transported to cellular factories ca...

Chernobyl: The true scale of the accident

...by the shelter is the possible collapse of its top structures and the release of radioactive dust. Strengthening those unstable structures has been performed recently, and construction of a New Safe Confinement covering the existing shelte...

Student scientists create living bacterial photographs

...atterns of light or make bacteria that can produce structures useful in medical treatments. The students are already busy on their next innovation--bacteria that can find and create a line around the edges of an image, a process that requires the bacteria to communicate with each other. They're also working ...

Oysters: The natural way to protect our shores

...s as opposed to other heavier shoreline protection structures (i.e. limestone rock breakwaters) which usually necessitate placement of additional material over time to maintain their effectiveness," authors, Bryan P. Piazza, Patrick D. Banks, and Megan K. La Peyre state. The authors evaluated the effectiveness...

'Nanospheres' that block pain of sensitive teeth

... of. At normal pH, it is composed of long rod-like structures but at high pH levels the particles of hydroxyapatite become smaller and more rounded, better for fitting inside the tiny channels in teeth. To see whether nanospheres would be successful at filling the channels they used commercially available sil...

Creeping crinoids! Sea lilies crawl to escape predators, new video shows

... is studying fossil crinoids, looking for telltale structures that will help him understand how and when sea lilies developed the ability to move around and shed their stalk ends. He also hopes to learn more about the roots of the relationship between crinoids and their predators. "We think that perhaps the in...

U. of Colorado researcher identifies tracks of swimming dinosaur in Wyoming

... is studying fossil crinoids, looking for telltale structures that will help him understand how and when sea lilies developed the ability to move around and shed their stalk ends. He also hopes to learn more about the roots of the relationship between crinoids and their predators. "We think that perhaps the in...

Bacteria which sense the Earth's magnetic field

...ich has already helped shed light on many cellular structures and functions. Cyroelectron tomography makes it possible to analyse structures in detail inside an intact, shock-frozen cell (minus 196 degrees celsius), and to display them in th...

Seaweed yields new compounds with pharmaceutical potential

Researchers have discovered 10 new molecular structures with pharmaceutical potential in a species of red ...ovisional patent to protect the discovery of these structures and small variations of them. "These molecular structures are curious in the way carbon atoms are a...

Male elephants woo females with precise chemistry

...ne of a pair of chemical compounds whose molecular structures are mirror images of each other. Frontalin, a pheromone discharged during musth by male Asian elephants from a temporal gland located between the eye and ear, comes in two forms, each representing one half of the enantiomer pair and identified as eit...

DNA self-assembly used to mass-produce patterned nanostructures

... properties of DNA to mass-produce nanometer-scale structures in the shape of a 4x4 grids, on which patterns of ... of assembling tiles can be used create biological structures that could act as tiny sensors. ...

Researchers: Treated wood poses long-term threat

...al tons of arsenic will leach from decks and other structures in the next 40 years. That suggests that managers may want to carefully consider what should be the final resting place for CCA-treated wood that has been taken out of service, Townsend said. "These estimates provide decision-makers with informatio...

Nanoparticles, nanoshells, nanotubes: How tiny specks may provide powerful tools against cancer

...r. This tactic focuses on two main ingredients: structures called "nanoshells," which are microscopic balls consisting of a silica core coated with a thin layer of gold and, secondly, near infrared light (NIR). Used alone, nanoshells are non-toxic and can be excreted with no ill effect because gold is biolog...

Gene controls whether fear is a factor

...arly high levels in the lateral nucleus and in the structures that relay information about learned and instinctive fear to the amygdala. One such gene was stathmin. In the current study, the researchers found that the brains of mice lacking stathmin showed an unusual number of microtubules, which are structura...

Genetic defenders protect crops from fungal disease

...ade healthy plant cells and form root-like feeding structures called haustoria. The plant cell wall is the primary barrier to this invasion and one of the defense genes described in the current study, called PEN2, prevents the fungus from penetrating cell walls in the first place. If this first line of defens...

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