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Tag: "image" at biology news

Is there a pilot in the insect?

...When an insect, bird or pilot flies over land, the image of the ground below sweeps from front to back across the central part of the visual field, creating an "optic flow", which is defined as the angular speed at which the ground contrasts move past. By definition, this angular speed is equal to the rat...

Scientists unveil piece of HIV protein that may be key to AIDS vaccine development

...attaches to a cellular receptor known as CD4. That image gave researchers a glimpse of some sites on the virus that could be targets of drugs or vaccines, but it also revealed the extent of HIV's overlapping defenses. For example, scientists subsequently learned that CD4-gp120 contact causes gp120 to chang...

Chemical switch triggers critical cell activities

The freeze-frame image of a molecular relay race, in which one enzyme pas...lecules. The goal was to create a freeze-frame image that captured the fleeting moment when E2 is next to NEDD8, just before it falls off and carries NED...

Using dental X-rays to detect osteoporosis

... in dental practice for several reasons. Using the image information from these radiographs to detect patie...o the same extent as the BMD measurements. The image analysis can be automated and does not require extra time on the part of the dentist. The newly deve...

Ultrasound upgrade produces images that work like 3-D movies

...t's been made possible to display real-time stereo image pairs on a clinical scanner," said Stephen Smith, a professor of biomedical engineering at Duke. "We believe all 3-D scanners could be modified in this way with only minor software changes." The new imaging capability can improve the early diagnos...

Biologically inspired sensors can augment sonar, vision system in submarines

...underwater vehicles should be able to autonomously image hydrodynamic events from their surroundings, Liu said. "Although biology remains far superior to human engineering, having a man-made parallel of the biological system allows us to learn much about both basic science and engineering," Liu said. "To...

Novel computed imaging technique uses blurry images to enhance view

...SAM works by utilizing light from the out-of-focus image planes, Ralston said. "Although most of the image planes are blurry, ISAM descrambles the light to produce a fully focused, three-dimensional image." ...

DNA layer reduces risk of reserve parts being rejected

...articles (DNA), Step 4 washing stage. Click on the image for a larger version More possibilities Following this successful result, Van den Beucken will investigate whether DNA layers can be used for the application of DNA membranes to prevent post-operative adhesions, and in biosensors such as an i...

How T lymphocytes attack

...ver the first 150 micrometres of the tumour. Each image provided a photograph of the different cell populations, blood vessels and collagen fibres present. And using a series of successive images, it was possible to reconstitute the trajectory of a T lymphocyte. Using this method, the researchers thus ...

Satellites shed light on global warming

...mapping ice boundaries, Rott used repeat-pass ASAR image data to map the flow velocities of glaciers. All the glaciers, where the buttressing ice had disappeared, have accelerated significantly. The retreat of grounded ice and the accelerated ice export due to increased velocity result in strongly negative...

A first glimpse of the influenza replication machine

...renoble, have now produced the first 3-dimensional image of part of this key protein. The study, which is p...n Radiation Facility to generate a high-resolution image of the two proteins interacting with each other. The image revealed that mutations known to play a r...

Preliminary study finds holographic imaging system promising for cancer treatment planning

...otations per minute, forms a detailed, holographic image that can be viewed and manipulated from any vantage point around the 360-degree dome, by any number of users. The study compared radiation treatment plans produced on a flat computer screen with those prepared using the Perspecta. Fourteen previou...

Protein structure initiative launches new resources for the scientific community

... proteins; Robotic systems to handle samples and image crystals; Enhanced software to analyze structural data and create higher-resolution images; More accurate screening processes to detect crystals suitable for imaging; and Improved systems for making proteins from machines, instead of cells. ...

Fantastic Voyage: A new nanoscale view of the biological world

...ss journal Journal of Biology makes it possible to image and quantify molecules within individual mammalian...anipulate visible light - to create an atomic mass image of the sample. Lechene et al. developed MIMS by combining the use of a novel secondary-ion mass spec...

Robotic whiskers can sense three-dimensional environment

...r environment and to construct a three-dimensional image of their world. Rodents, for example, use their wh...al signals to the brain, where a three-dimensional image is presumably generated. Hartmann and Solomon showed that their robotic whiskers could extract in...

Mysterious 'neural noise' actually primes brain for peak performance

... general had used up until the mid-80s: You see an image and you relate that image to one stored in your head. But the reality of the cranial world seems to be a confusing array of po...

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

...y a computer and used to build a three-dimensional image of the heart. The picture is so good, researchers say, it decreases the need for invasive, more risky procedures, such as angiograms or cardiac catheterization, to check for arterial blocks. More than 1 million Americans undergo cardiac catheter...

Detailed 3-D image catches a key regulator of neural stem cell differentiation in action

...A polymerase together and obtained a 3-dimensional image showing how Scp1 hangs onto the seven amino acid residues reiterated in the polymerase tail. "We captured Scp1 bound to a single seven amino-acid long repeat containing specific phosphates," explains Zhang, the paper's first author. "It turns out tha...

Powerful genome ID method extended to humans

...genome. The method uses fluorescence microscopy to image individual DNA molecules that have been divided into orderly fragments by so-called restriction enzymes. By imaging large numbers of an organism's DNA molecules, optical mapping can produce a map of its genome at a relatively low cost. An optic...

SARS: No evidence that any of the treatments worked

...w.plos.org/press/plme-03-09-stockman.pdf Related image for press use: http://www.plos.org/press/plme-03...negative contrast transmission electron microscopy image of SARS coronavirus. Credit: Charles D. Humphrey, Centers for Disease Control and Prevention, USA C...

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