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Particle in Biological News

Scripps scientists create first crystal structure of an intermediate particle in virus assembly

The structure, described February 8 in an advance online publication of the journal Nature , provides fresh insights into the elegant dance that viral proteins perform to create the infectious structure that causes all manner of misery and disease, say researchers. While the virus they studied, H...

LDL particle measurement by NMR recognized by ADA, ACC

Raleigh, NC, March 28, 2008 - The American Diabetes Association (ADA) and the American College of Cardiology (ACC) issued a consensus statement today that states the measurement of LDL particle number by nuclear magnetic resonance (NMR) is one of the more accurate ways to evaluate cardiometabolic ...

Chemical engineers discover new way to control particle motion

Chemical engineers at The University of Texas at Austin have discovered a new way to control the motion of fluid particles through tiny channels, potentially aiding the development of micro- and nano-scale technologies such as drug delivery devices, chemical and biological sensors, and components ...

Obama administration announces more than $327 million in Recovery Act funding for science research

...eady allocated as follows: Fermi National Accelerator Laboratory; Batavia, IL$60.2 million, including $52.7 million for research on next-generation particle accelerator technologies; and $7.5 for neutrino research in collaboration with Brookhaven National Laboratory. Lawrence Berkeley National Laborator...

Jet-propelled imaging for an ultrafast light source

...small that the proteins or viruses dissolved in the liquid can only fit into the droplets one at a time. And the nozzle won't clog, because even a particle bigger than the sample protein or virus bigger than the stream of liquid itself can still fly through the glass nozzle without hitting the walls and...

All-in-1 nanoparticle: A Swiss Army knife for nanomedicine

...h factoring in roughness the thinnest coating you can build is 5-6 nanometers. Gold ions are much, much smaller." The total diameter of the combined particle is roughly 15-20 nanometers, small enough to be able to slip into a cell. Incorporating gold provides a well-established binding site to attach bi...

Nanodiamonds deliver insulin for wound healing

...ner. (Ho is a member of the Robert H. Lurie Comprehensive Cancer Center of Northwestern University.) In addition to using the nanodiamonds in their particle form, Ho's group has developed devices that harness the slow drug-release capabilities of the nanodiamonds. More recently, his team has shown that nan...

New way to make sensors that detect toxic chemicals

...ure chemical molecules from the air -- and very pure particles -- which enable the sensor to detect even very small quantities of a substance. Each particle of nickel oxide measures only about 50 atoms across -- that's equivalent to five nanometers (billionths of a meter). Beach described the synthesis ...

NSF provides $3.4 million to study climatically important Agulhas Current

...th no moving parts, measuring velocity using the principle of Doppler shift, whereby the frequency of a sound wave changes as it reflects off a moving particle in the ocean. Offshore recirculations and meandering events will be captured using the C-PIES, which can give information about the transport over ...

Tips from the journals of the American Society for Microbiology

...are pursuing vaccine strategies that can induce cross-reactive immunity against multiple strains of influenza viruses. In prior research virus-like particle (VLP) vaccines have proven to be a promising new technology at preventing diseases in humans. VLPs resemble their live-virus counterparts and are rea...

Shape matters in the case of cobalt nanoparticles

...operties, and have potential applications in information storage, energy and medicine. One striking difference is the behavior of the two different particle types when external magnetic fields are applied and then removed. In the absence of a magnetic field, both the spherical and cubic nanoparticles spont...

The coming of biofuels: Study shows reducing gasoline emissions will benefit human health

... with 10-percent less gasoline-run motor vehicle emissions ranges from about 5,000 to 20,000 DALY, with most of the damage resulting from primary fine particle emissions," said McKone. "While county-specific damages range over nine orders of magnitude across all U.S. counties most of the damage, as you would ...

University awarded £1.7M to develop nanotechnology for use in health care

... be effective. Scientists, working closely with industry experts, will investigate the possibility of creating viable drugs in nanoparticle form each particle being approximately 1/800th the width of a human hair. By examining how successfully they can be absorbed into the intestine, and in what form they pa...

Genetic switch potential key to new class of antibiotics

...ss to a high-energy synchrotron radiation source located at the Stanford Synchrotron Radiation Laboratory (SSRL, CA) for experiments. Synchrotrons are particle accelerator facilities that direct high energy X-rays at crystals to produce detailed electron density maps from which extremely accurate 3-D pictures...

Two-day symposium in Baltimore to tackle the promises and perils of proton radiotherapy

...chers, clinicians, and public health experts will debate the promise and perils of proton radiotherapy -- a 70-year-old idea that bridges medicine and particle physics. Spearheaded by the AAPM Science Council and sponsored by the American Association of Physicists in Medicine (AAPM), "A Symposium on the Prom...

AGU journal highlights -- March 25, 2009

...e humidity rises because the acid-coated soot absorbs water. An increase in particle mass is often accompanied by a decrease in size, suggesting that conventional measurement methods based on particle size may underestimate the impact of soot aging on clouds. Because sulfuric...

Mountain on Mars may answer big question

...d of a paper." Co-author Morgan is an associate professor of Earth science. In modeling the formation of Olympus Mons with an algorithm known as particle dynamics simulation, McGovern and Morgan determined that only the presence of ancient clay sediments could account for the volcano's asymmetric shape....

World's top minds to celebrate 'the birth and life of beginnings'

...ch for the Origins of Species" on March 19. Lisa Randall, a theoretical physicist at Harvard University and one of the world's leading experts on particle physics and cosmology. Her work in string theory as the quest to explain the underlying physics of the universe has attracted enormous attention aroun...

Commercial ships spew half as much particulate pollution as world's cars

...e of maritime shipping's total contribution to air particle pollution based on direct measurements of emission...lfates make up just under half of shipping's total particle emissions, according to the new study. The other h...f burning low-sulfur fuels is that, although total particle emissions diminish, the time that particles spend ...

Indoor air pollution increases asthma symptoms

...tion Agency (EPA) regulates outdoor levels of fine particle pollution, but does not have a standard for coarse particle pollution. There are no regulations for indoor pol...bic meter of air (ug/m3) increase in indoor coarse particle concentration, there was a 6 percent increase in t...

Nanoparticle toxicity doesn't get wacky at the smallest sizes

...tal surface area as a measure of dose, rather than particle mass or number of particles, and observing how cul... due to the inherent nature of the material or the particle size under scrutiny. "Different dose metrics gi...and off. They found that when calculating doses by particle number or mass, the amount needed to generate a bi...

TECNALIA uses artificial vision to improve recycling of electronic scrap metal

...entified The minimum and maximum size of components to be separated The height of each component Notable problems of certain materials The average particle weight of each component, or the shape thereof, in order to estimate how many particles could pass through if a flow of 1 Tn/h is desired. ...

Particulate emission from natural gas burning home appliances

...), and Riello SpA, Burner Division, used advanced optical diagnostic tools, particle collection methods, and particle size assessment to identify particulate matter with diameters in the range ...

No quick or easy technological fix for climate change, researchers say

...sustained for hundreds of years." The basic idea behind stratospheric particle injections is that the Earth's temperature depends on the reflectivity of t...mple at all. We now know that the properties and effects of a geoengineered particle layer in the stratosphere would be far more unpredictable, for example, tha...

MIT researchers explain mystery of gravity fingers

... downward through soil that made it appear to move as a steady, horizontal front, rather than in finger-like pathseven when the soil was homogenous in particle size and shape? The missing mathematical phrase describes the surface tension of the entire finger of water, which may be several centimeters in w...

'Strained' quantum dots show new optical properties

...ces of the semiconductors making up the inner core and outside shell of the particle creates strain: the core is squeezed and the shell is stretched. This physi...attice strain is another key factor that must be considered, in addition to particle size and composition." ...

Researchers examine role of soil patterns in dam restoration

...rried closer to the spot where the dam once stood, while heavier, coarser particles tended to move less and settle farther out. These gradients in particle size also dictate how some nutrients are distributed on the landscape, says Balster. For example, the team found higher concentrations of phosphorus, ...

Proteins strangle cell during division

...he process of cell division in Sulfolobus acidocaldarius could therefore lead to new insights into the processes involving ESCRT proteins, such as HIV particle release. Evolution Some theories suggest that in evolutionary terms the Archaea are the predecessors of eukaryotes. This is confirmed by the fa...

'Gray's Paradox' solved: Researchers discover secret of speedy dolphins

...ogy by modifying and combining force measurement tools developed for aerospace research with a video-based flow measurement technique known as Digital particle Image Velocimetry, which can capture up to 1,000 video frames per second. Wei videotaped two bottlenose dolphins, Primo and Puka, as they swam throu...

ORNL supercomputer simulation wins prize for fastest-running science application

...e obvious potential application in power transmission, and superconducting magnets have found a place in hospital magnetic resonance imaging machines, particle accelerators such as Europe's Large Hadron Collider, and magnetic levitation transportation systems. The challenge is that superconducting material...

Where there's wildfire smoke, there's toxicity

...studies by air polllution specialist Constantinos Sioutas of the USC Viterbi School of Engineering, who is also co-director of the Southern California particle Center. For the study Sioutas and colleagues from USC, the University of Wisconsin-Madison and RIVM (the National Institute of Health and the Envir...

Jupiter's shrinking red spot

...nes. Well-established theories developed for Earth ripples in air and water and extended to Martian surface conditions predicted that the transitional particle diameter between these behaviors on Mars would four times that of Earth's. Yet they were essentially the same. Why was the established theory wrong f...

Animal and biological science highlights: San Antonio Fluid Dynamics Conference, Nov. 23-25

...they flowed through the water as a result of the wing movements. From these particle trajectories, the scientists could determine the forces produced by the win...sselaer Polytechnic University in New York, and his colleagues used Digital particle Image Velocimetry (DPIV). In the technique, the fluid flow within a digital...

National and international doctoral training

...Research Training Group "Mass, Spectrum, Symmetry: particle Physics in the Era of the Large Hadron Collider," ...rtise in the various research fields of elementary particle physics and to clearly point out the collaborative...uilding a bridge between astroparticle physics and particle physics in accelerators. (Host universities: Humbo...

Small satellite takes on large thunderstorms

...s new small satellite mission sponsored by the National Science Foundation (NSF). It's designed to help solve the mystery of the most powerful natural particle accelerator in Earth's atmosphere: TGFs, or terrestrial gamma-ray flashes. TGFs likely result from thunderstorms. The mission is the second project...

'Femtomolar optical tweezers' may enable sensitive blood tests

... the sphere. This in turn can detect and count biological antigens at extraordinarily low "femtomolar" concentrationsroughly equivalent to one antigen particle per quadrillion (1,000,000,000,000,000) water molecules. ...

AGU journal highlights: Nov. 11, 2008

... a phenomenon of great importance to our solar system, and presumably to other star systems, because it converts energy stored in magnetic fields into particle kinetic energy. Further, reconnection changes the magnetic field topology, allowing effective exchanges of mass, momentum, and energy between differen...

UD researchers show that plants can accumulate nanoparticles in tissues

...he human body. The magnetometer subjected the dried pumpkin plants to a low-frequency monotone to vibrate them. The vibration revealed each tiny particle of magnetite's unique magnetic signal and, thus, exact location inside the plant. The researchers noted that in their initial screening tests, no m...

When a good nanoparticle goes bad

...'s edition of the journal Nature Materials , also came with a surprise. By devising a way to watch individual molecules react with a single nanoscale particle of gold in real time, researchers confirmed that some gold particles are better at increasing the rate of a chemical reaction than others, but they al...

Detecting tiny twists with a nanomachine

...roscope that measures the torques produced by electrons changing their spin states. It can be used to uncover new spin-dependent fundamental forces in particle physics, according to Raj Mohanty, Boston University Associate Professor of Physics. "This is perhaps the most sensitive torque measurement every ...
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