tip in Biological News

Hormone-mimics in plastic water bottles -- just the tip of the iceberg?

In an analysis1 of commercially available mineral waters, the researchers found evidence of estrogenic compounds leaching out of the plastic packaging into the water. What's more, these chemicals are potent in vivo and result in an increased development of embryos in the New Zealand mud snail. The...

BioScience tip sheet, March 2009

The March 2009 issue of BioScience includes the following peer-reviewed articles: Molecular Biology and Genomics: New Tools for Weed Science. Patrick J. Tranel and David P. Horvath. Modern techniques have allowed great advances against weeds, including the development of herbicide-resistan...

BioScience tip sheet, February 2009

The February 2009 issue of BioScience includes the following peer-reviewed research articles: Biological Resource Centers and Systems Biology. Yufeng Wang and Timothy G. Lilburn. The authors propose leveraging phenotypic data from the few bacteria in resource collections that are well c...

BioScience tip sheet, January 2009

The January 2009 issue of BioScience includes the following research articles: Leaf Evolution and Development: Advancing Technologies, Advancing Understanding. Heather L. Sanders and Sarah E. Wyatt. Advancing techniques are revealing networks of genes and epigenetic phenomena that regulate ...

BioScience tip sheet, December 2008

The December 2008 issue of BioScience includes a Special Section consisting of four articles on Endocrine Disruptors in the Environment, coordinated by Louis J. Guillette, Jr., of the University of Florida. The complete list of research articles in the issue is as follows: Meeting the Chall...

BioScience tip sheet, November 2008

The complete list of research articles in the November 2008 issue of BioScience is as follows: Identifying and Characterizing Bacteria in an Era of Genomics and Proteomics. David Emerson, Liane Agulto, Henry Liu, and Liping Liu. New molecular technologies in genomics and proteomics are changi...

BioScience tip sheet, October 2008

Research articles that will be published in the October 2008 issue of BioScience are as follows: Fungal Community Ecology: A Hybrid Beast with a Molecular Master. Kabir G. Peay, Peter G. Kennedy, and Thomas D. Bruns. DNA-based techniques have in recent years allowed the systematic exp...

BioScience tip sheet, September 2008

Research articles that will be published in the September 2008 issue of BioScience are as follows: The Molecular Biology Toolbox and Its Use in Basic and Applied Insect Science. Michel Cusson. The sequencing and annotation of insect genomes and comparative genomics are providing new insigh...

August LabBits: A media tip sheet from the MBL in Woods Hole

MBL, WOODS HOLE, MASummer on Cape Cod is synonymous with a surge of tourists, but also a surge of scientists at the MBL (Marine Biological Laboratory). For more than a century, researchers have come to the MBL each summer from around the world to immerse themselves in biological discovery. Researc...

NYU Langone Medical Center's tip sheet to the International Conference on Alzheimer's Disease 2008

NEW YORK, July 26, 2008 NYU Langone Medical Center researchers have long been making important contributions to the understanding of Alzheimer's disease. They were among the first to characterize amyloid, the plaque-forming protein implicated in Alzheimer's, and the first to describe a genetic m...

BioScience tip sheet July/August 2008

Research articles published in the July/August 2008 issue of BioScience are as follows: High-Speed Developments in Avian Genomics. Camille Bonneaud, Joan Burnside, and Scott V. Edwards. An increasingly broad range of genomics techniques is being applied to birds, thus expanding what has ...

Mayo Clinic Proceedings January tip sheet

ROCHESTER, Minn. -- Featured articles from the January issue of Mayo Clinic Proceedings include the effects of antioxidant supplements on cancer, guidelines for workplace drug screening and the safety and effectiveness of nasal spray flu vaccine. Mayo Researchers Examine the Effect of Antioxi...

Cancer tip -- Nanoparticles can damage DNA, increase cancer risk

Tissue studies indicate that nanoparticles, engineered materials about a billionth of a meter in size, could damage DNA and lead to cancer, according to research presented at the 2007 Annual Meeting of the American Association for Cancer Research. Nanoparticles are small enough to penetrate cell ...

Highest ever winter water temperatures recorded

...tellites have given oceanographers an insight into a remarkable phenomenon a significant extension of the Leeuwin Current curling around the southern tip of Tasmania and reaching as far north as St Helens. Remote sensing specialists at CSIRO's Wealth from Oceans Flagship have been observing the curre...

Venomous sea snakes play heads or tails with their predators

...r, the Yellow-lipped Sea Krait has been found to twist its tail so that the tip corresponds with the dorsal view of the head, which combined with deceptive...tinctive colouration pattern, with a bright yellow horseshoe marking on the tip of the head and the tail. The yellow was deeper than the colours on the res...

Scientists 'rebuild' giant moa using ancient DNA

...ul eagle in the world. The research team also demonstrated that it is possible to retrieve DNA from all parts of the ancient feathers, not just the tip of the quill, as previously thought. "This important finding opens the way to study DNA from museum bird skins while causing almost no damage to th...

NSF provides $3.4 million to study climatically important Agulhas Current

...f Stream" of the southern Indian Ocean, carrying warm and salty tropical waters southward along the east coast of Africa as a narrow, fast jet. At the tip of Africa the Agulhas retroflects, looping around to eventually flow eastward toward Australia. This retroflection is unstable and regularly sheds lar...

Salt block unexpectedly stretches in Sandia experiments

...clinging to a special microscope's nanometer-sized tip as it left the surface of the salt. More inten...f bubble a ductile meniscus with the exploratory tip as it withdrew from penetrating the cube. In this,...t meniscus didn't break from its own weight as the tip was withdrawn. Instead it followed the...

UC Davis researchers visualize formation of a new synapse

...ne neuron grow toward the dendrites of neighboring neurons. As they do so, finger-like structures called filopodia extend and retract rapidly from the tip of the axons and eventually make a stable contact with the dendrite. We can then see neuroligin accumulate at these new contact sites very rapidly, po...

Story tips from the Department of Energy's Oak Ridge National Laboratory, June 2009

...sed to enhance the healing of abrasions and erosions, and the Cornea Treatment Tool, useful for delivering drugs from the array of glass spikes on the tip of the tool to the exact disease sites. Patents are pending. This research has been funded by ORNL's Laboratory Directed Research and Development and ...

Fossil teeth of browsing horse found in Panama Canal earthworks

... was probably a mosaic of relatively dense forest and open woodlands. The presence of this browsing horse in Panama significantly extends the southern tip of its range from previous finds from roughly the same period in Florida, Nebraska and South Dakota. Expanding the Panama Canal waterway to make w...

Tulane receives grant to study limb regeneration

...nd/or sustain the regenerative response. While the salamander is the only animal capable of regenerating lost appendages, a child can grow back the tip of a severed finger, and, even in adults, bone, muscle, cartilage and skin can independently undergo a healing and regeneration response. "What's m...

100 reasons to change the way we think about genetics

...y in Israel. Their article outlines inherited epigenetic variation in bacteria, protists, fungi, plants, and animals. These findings "represent the tip of a very large iceberg," the authors say. For example, Jablonka and Raz cite a study finding that when fruit flies are exposed to certain chemical...

Prefilled WFI Syringe Provides a High-Quality Solution for Drug Reconstitution

...and Vetter’s V-OVS® tamper-evident closure, which includes a West tip cap. The film, developed by West’s partner, Daikyo Seiko, Ltd., provi... a prefilled syringe system effective protection features. It consists of a tip cap, a Vetter Luer Lock and a tamper-evident seal. The components are pre-a...

True grit

...ich, like those of rodents, are ground down at the tip but continue to grow on the other end throughout t...ure calcite; they are concentrated at the grinding tip of the tooth, particularly in the tip's center, wh...ng. What holds these crystals at the center of the tip is a matrix of larger and softer calcite crystals....

Avian flu research sheds light on swine flu outbreak

...lab strain that enabled respiratory transmission between mammals was on the tip of the HA surface protein, one of the sites where human antibodies created ...rain of avian influenza will mutate to infect mammals. "This is just the tip of the iceberg," said Perez. "Many more studies have to be done to see whi...

Native Americans descended from a single ancestral group, DNA study confirms

... allele," the variant (which does not have a biological function), occurred in all of the 41 populations that they sampled from Alaska to the southern tip of Chile, as well as in Inuit from Greenland and the Chukchi and Koryak people native to the Asian (western) side of the Bering Strait. Yet this allel...

Measuring snow with a bucket, a windmill, and the sun?

...rby is a data-collection box that is linked to the windmill and solar panels. When the bucket fills up with melted snow it tips over and empties. Each tip of the bucket measures 0.01 inches of precipitation and is recorded to the data recorder, which transmits the data and is updated on the web every hou...

Olympus advances technology for laparo-endoscopic single-site surgery

...able EndoEYE, which uses digital-chip technology to place the camera on the tip of the scope, and which delivers high-quality images enabling doctors to se...g the light post and intrusive second cable. Incorporation of a deflectable tip on the EndoEYE provides surgeons with the flexibility to change the directi...

New nucleotide could revolutionize epigenetics

...ao, until earlier this month. "You look at our result, and the beautiful studies of the enzymology by Dr. Rao's group, and realize that you are at the tip of an iceberg of interesting biology and experimentation," says Heintz, a neuroscientist whose research has not focused on epigenetics in the past. "T...

MIT: Novel needle could cut medical complications

...she is actually applying force only to the filament, not the needle itself, thanks to a special clutch. When the filament, which moves through the tip of the needle, encounters resistance from a firm tissue, it begins to buckle within the S-shaped tube. Due to the combined buckling and interactions w...

Making a point: Picoscale stability in a room-temperature AFM

...with the added complication that the system has to work with the scant amount of light reflected off the apex of the AFM probe. Unwanted motion of the tip relative to the sample is corrected on the fly by moving the substrate in the opposite direction. This is the same idea as active noise cancellation h...

Covering the bases: Quantum effect may hold promise for low-cost DNA sequencing, sensor applications

...unneling microscope used in the present study features a delicate electrode tip held very close to the DNA sample. When this tip is fitted with a particular nucleotide and brought in contact with its comp...

Scientists at CSHL discover mobile small RNAs that set up leaf patterning in plants

...axis analogous to the front/back or "dorso-ventral" axis in animals is established by a signal derived from the meristem, the stem cell-rich growing tip of the plant from which new leaves arise. Other signals that traffic between the upper and lower sides of the leaf are thought to stably maintain this...

Microscope reveals how bacteria 'breathe' toxic metals

...what like a miniaturized phonograph needle: a tiny tip dangles from a cantilever above a surface that's b...eing studied. The cantilever measures how much the tip rises and falls as it's dragged over the surface. ...meter), and detect atomic forces between the probe tip and the surface material. They combined the AFM...

New explanation for a puzzling biological divide along the Malay Peninsula

...ong where there are 30 percent fewer species than there should be," Woodruff said. Although 128 mainland Asian species stopped before the southern tip of the peninsula and 121 island species were found only in the south, 35 widely distributed species were found above and below the isthmus, but were m...

Study offers clues to beating hearing loss

...eads, myosin 7 only has one. What's more, for the first time we've found how this myosin can be switched on and switched off. When switched off, the tip of its tail curls round and contacts the head, and switched on this contact is broken and the myosin stretches out. This knowledge should help inform ...

Unfolding 'nature's origami'

...ing into the correct shape so that it can carry out its job efficiently and it folding incorrectly, which can lead to disease. Just one wrong step can tip that balance." Proteins are made of amino acids arranged in a linear chain and the sequence of these amino acids is determined by the gene producin...

Scientists at CSHL discover mobile small RNAs that set up leaf patterning in plants

...axis analogous to the front/back or "dorso-ventral" axis in animals is established by a signal derived from the meristem, the stem cell-rich growing tip of the plant from which new leaves arise. Other signals that traffic between the upper and lower sides of the leaf are thought to stably maintain this...

Crab claws pack strengthening bromide-rich biomaterial

...d. "The next time you are eating a Dungeness crab, notice that the sharp tip of the leg is a cap of translucent material that is very different from the...mes further before breaking than the material used in other regions. If the tip were made of the same material as the rest of the crab, it could never stay...