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Tag: "electron" at biology news

Microbes at work cleaning up the environment

...sing secondary ion mass spectrometry, transmission electron microscopy and infra-red spectroscopy, the scientists were able to study whether protein contributes to the formation of densely aggregated nanoparticulate zinc sulfide spheroids. They also studied whether various amino acids induce rapid aggregat...

In nature, proteins sweep up nanoparticles

... The team examined the biofilm using transmission electron microscopy at Berkeley Lab’s National Center for Electron Microscopy, a national user facility that probes material at the nanoscale. They found that the zinc sulfide nanoparticles were arranged in dense aggregates. Such tightly packed metal sulfide ...

Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

...tions, consulting specialists and using a scanning electron microscope to examine the jaws and other hard parts of the nudibranchs that distinguish species. This was part of the formal project “Phylogenetic Systematics of Nudibranchia,” sponsored by a National Science Foundation grant to Terrence M. Goslin...

Newborn neurons like to hang with the 'in' crowd

...le arsenal of high-tech imaging technology and the electron tomography expertise of Mark. H. Ellisman, Ph.D., a professor at the National Center for Microscopy and Imaging Research at the University of California, San Diego, Toni then zoomed in at a nanometer scale and watched how the young and the old got ac...

New technique will produce a better chromosome map

...st published in 1935, and generations of light and electron micrographs have yielded an imprecise guide to the... microscopy, it is faster and more economical than electron microscopy, with comparable or superior results. With a more accurate chromosome map, researchers...

Magnetic computer sensors may help study biomolecules

...magnetic field of sufficient strength to align the electron "spins" in the magnetic layers in the same (on) or opposite (off) directions. NIST researchers made an array of spin valves, each about one by four micrometers in size, patterned on a 200-nanometer-thick silicon nitride membrane in fluid. When the sp...

Left-right wiring determined by neural communication in the embryonic worm

...the nervous system of the embryonic worm. Using an electron microscope, they discovered that the developing worm's neural network, which had not previously been mapped, was completely different from that of the mature animal. "A large number of embryonic neurons are heavily interconnected by gap junctions," s...

Cartilage discovery offers arthritis hope

...he University of Manchester has used sophisticated electron microscope techniques to uncover the molecular structure of the thinner of the two types of collagen fibrils. Professor Karl Kadler, who led the research in the Faculty of Life Sciences, said: "The ability of cartilage to withstand cycles of compre...

Researchers create artificial enzyme that mimics the body's internal engine

...ne of each mitochondrion is a structure called the electron transport chain, which produces adenosine triphosp... chain is made up of a series of proteins known as electron carriers. Each carrier receives electrons from the preceding one, then transfers them down the chain...

Lead with a poisonous electron shield

...ur atoms. The reason for this is the emerging free electron pair of the lead cation. It acts as an electronic ..., while the other hemisphere is filled by the free electron pair. This observation may help in the design of future lead-specific antidotes....

No sex for 40 million years? No problem

...encing and jaw measurements taken using a scanning electron microscope, the research team examined bdelloid rotifers living in different aquatic environments across the UK, Italy and other parts of the world. They found genetic and jaw-shape evidence that the rotifers had evolved into distinct species by adap...

Speeding 'fingertip' discovery -- 20 years of protein info in 1 place

...sue of Nature Biotechnology. Pandey’s team used electron transfer dissociation (ETD) tandem mass spectrometry, a technology that breaks apart proteins into small fragments, separates them by size and identifies the fragments based on their mass - their size and weight. The process improves on previous tech...

New culture method for hepatitis C virus uses primary hepatocytes and patient serum

...tocytes. Finally, virus particles were examined by electron microscopy and shown to possess the expected size and shape of HCV virus particles. Once the system was established, the group examined whether sera from patients carrying HCV could infect the human fetal hepatocytes. When sera from patients infe...

Ring-around-the-cell

...o samples of stripped-down, polarized osteoclasts: electron microscope imaging that allowed them to see fine details of the ring structure, and a light microscope method in which specific features glow. Because each method captures different information at a different scale, combining them was tricky, but the...

Cholera pathogen reveals how bacteria generate energy to live

...aramagnetic Resonance Spectroscopy, which observes electron spin, she and her co-worker Mark Nilges at the University of Illinois analyzed the properties of the flavin molecules, and mapped these functional properties to specific points in the protein structure. NQR is only one of several sodium pumping en...

A sweet step toward new cancer therapies

...at problem, researchers have used a process called electron capture dissociation (ECD) instead of the usual "shake-it-til-it breaks" method to fragment proteins. But that method requires the presence of at least two positive charges, which can be difficult to accomplish with acidic molecules, such as proteins...

Single molecule extends fat mice lives by reversing gene pathways associated with disease in obese

...r. Mitochondria generate energy in cells. Through electron microscopy, investigators showed that the livers of the HCR fed mice had considerably more mitochondria than the HC group, and were not significantly different from those of the SD group. Links to SIRT1 The team also asked if SIRT1 was activate...

ASU researchers test antibacterial effects of healing clays

...king to have someone take high resolution scanning electron micrographs of the clays," Williams explains. "I confess that we all ignored him initially." According to the Brunet de Courssou Web site, the family has been operating health clinics on the Ivory Coast and in New Guinea. For a decade, Madame Line...

Interaction between lymph and liver cells may affect immune response

... cells (LSECs) and hepatocytes (liver cells) using electron microscopy. LSECs are highly specialized endotheli.... The mouse livers were examined with two types of electron microscopy. Analysis of the images showed a large number of intrahepatic lymphocytes (IHLs) that had...

Fast-freeze snapshot yields new picture of nerve-muscle junction

...e described in the new study, high-pressure freeze electron microscopy and immuno-gold staining, now provides an accurate picture of where these synaptic proteins cluster -- information previously unknown to scientists. Co-author Robby Weimer, a post-doctoral fellow at the Cold Stream Harbor Laboratory in N...

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