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Tag: "images" at biology news

Interaction between lymph and liver cells may affect immune response

... two types of electron microscopy. Analysis of the images showed a large number of intrahepatic lymphocytes (IHLs) that had extensions similar to the dimensions of the fenestrations of the LSECs. These extensions were seen within the fenestrations and were observed to be in contact with minute projections o...

Preliminary study finds holographic imaging system promising for cancer treatment planning

...ed by Actuality Systems, Inc., creates holographic images inside a 24-inch dome. The full-color, full-motion system can display images of the body revealing the exact location of tumors in true 3D space. A study led by Rush, which a...

German researchers develop first non-invasive test to measure skin aging

...ciety of America. This new laser-based technique images the fabric of the deeper layers of the skin, combi...n/elastin factor. The team was also able to obtain images of tiny swaths -- one-fifth of a millimeter wide -- of the proteins' fibrous matrices, showing the p...

New way of tracking muscle damage from radiation

...nces. The St. Jude study showed that changes in images taken of muscles before and after radiation therap...diation therapy," Krasin said. The team made 60 images of the same area, including a dynamic view of what was happening in the muscles during a six-minute ...

Anticipation plays a powerful role in human memory, brain study finds

...ic resonance imaging, which produces high-contrast images of human tissue. They began by showing the volunte...eady started converting short-term memories of the images into longer-lasting ones. Mackiewicz says the anticipation of an uncomfortable situation probably...

Tiny Tampa Bay fish key to evolution of immune system

...h with X-rays, yielding incredibly high-resolution images of its structure. The lancelet also is known as amphioxus, or by the scientific name Branchiostoma floridae. "We were surprised not only by how similar the molecules are to our immune response proteins but also that the crystals diffracted to a leve...

Transplanted photoreceptor precursor cells restore visual function in mice with retinal degeneration

...on to the brain where signals are converted to the images we see. In the majority of macular and retinal degenerative diseases, such as age-related macular degeneration and retinitis pigmentosa, it is the loss of photoreceptors that leads to blindness. Understanding the birth of photoreceptors In 2001,...

Global changes alter the timing of plant growth, scientists say

... animals that depend on those plants." Satellite images in recent years have revealed that some regions of the globe are "greening" earlier in the spring--another signal that the Earth is responding to overall warming. The results of this study also showed that plant growth--as evidenced by peak "greennes...

Comments, experts and background on the 2006 Nobel Prize in chemistry

...that it can be used by the body. He obtained those images in a group of organisms that includes humans. In...lities in transcription. Kornberg obtained those images with x-ray crystallography, a technique that records the pattern formed as x-rays bend and spread wh...

Fantastic Voyage: A new nanoscale view of the biological world

... MIMS can generate quantitative, three-dimensional images of proteins, DNA, RNA, sugar and fatty acids at a subcellular level in tissue sections or cells. "Using MIMS, we can image and quantify the fate of these molecules when they go into cells, where they go, and how quickly they are replaced," says Leche...

PET imaging shows young smokers quick benefit of quitting

...est that measures metabolic activity and generates images of organ or tissue function?will continue to provide insight into coronary risk analysis and risk management (such as smoking cessation and lowering one's cholesterol)," he added. In the Hokkaido University study, researchers examined the effects ...

The subtleties of tropical forest demise

...he threats are," said Peres. "We rely on satellite images or aerial photos to tell us how fast tropical forests are disappearing, but many of the new and emerging threats are virtually invisible, unless you're on the ground." The editors define four categories of emerging threats to tropical forests: (1) T...

Fast test for low blood flow in dogs detects early heart trouble

...ally perceptible to the human eye from the scanned images but can be detected and quantified with CT imaging...r, calculating blood flow from the 3-D, scanned CT images was more complicated. Researchers used so-called deconvolution mathematical formulae to gauge the s...

Proteins may behave differently in natural environments

...s scientists to take very detailed two-dimensional images of individual molecules in a native-like environme...l biology, they assemble tens of thousands of such images into three-dimensional models that demonstrate the dynamics of the proteins. When Ludtke and his ...

Giant insects might reign if only there was more oxygen in the air

...rent atmosphere The researchers used x-ray images to compare the tracheal dimensions of four species of beetles, ranging in size from 3mm (Tribolium castaneum, about one-tenth of an inch) to about 3.5 cm (Eleodes obscura, about 1.5 inches). Beetles were not in existence during the Paleozoic period, ...

Shrinking ponds signal warmer, dryer Alaska

...red aerial photographs from 1978-1982, and digital images from the Landsat satellite from 1999-2002, Riordan outlined each pond by hand. "With automated classification your accuracy goes down," Riordan said. Cloud shadows can look like water and Alaska rarely experiences a cloudless day, said Verbyla. The...

Biologists probe the machinery of cellular protein factories

...1999 and 2001, producing the first high-resolution images of the molecular structure of a complete ribosome....e then joined together in the proper order. The images from Noller's group not only show the complete ribosome, they show it with a messenger RNA and two f...

A fisheye view of the deadliest breast cancer

...h also let the researchers make high-resolution 3D images of two potential anticancer compounds at work: a vascular endothelial growth factor (VEGF) receptor inhibitor called SU5416, and a protein kinase inhibitor called PP1. Analysis of compound and mock-treated animals revealed that SU5416 leads to shr...

Nerve cell software keeps track of brain change

...tical and Information Sciences, says there are few images more complex than the intricate, web-like branches...Vallotton says. A version of the software for 3D images is under development and will provide 'another dimension' of detail for researchers about nerve cell...

Researchers image molecular motor structural changes

...ell biologists had not been able to capture actual images of the structural changes that a molecular motor u...r molecule bound to a microtubule, we combined the images generated by high-resolution electron microscopy," said study investigator Sharyn Endow, Ph.D., a Du...

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