Gondwana split sorts out mammalian evolution
...s ago. But Springer and colleagues argue that the separation of South America and Africa around 100 million years ago during the Cretaceous in Gondwana (the southern hemisphere super-continent that incorporated Africa, Antarctica, Australia, India, Madagascar and South America before it broke apart) explains t...Argonne chemist wins national award for studies of plant energy
... of plants. The first reaction to take place is a separation of electrical charge, she said. Light is absorbed, the energy excites the chlorophyll molecules, and a fast electron transfer sets up the charge separation. Intrigued, Thurnauer and her team then made a laboratory version of the energy pump that keep...New process speeds protein separation
...t least two full days are required to complete the separation in two dimensions, and reproducibility of results ..., proteins remain in a liquid phase throughout the separation process. Like 2-D gel electrophoresis, the new method first separates the proteins by charge, using...Researcher traces gene development in 'last common link'
... to see whether this gene duplication predated the separation of jawless fish and vertebrates and whether the role in forebrain development had yet been acquired." Fruit flies, mice, worms and apes share an amazing amount of genetic information with us humans and with each other. For instance, there is onl...ORNL technology gets nod from EPA
...ter through a simple interface. No chromatographic separation is required, and the response of the instrument is nearly instantaneous. EPA's new Method 8265, developed by ORNL, embodies this technique. "The implication of the EPA's having made this direct sampling and analysis methodology an official method is ...Bat sonar and anti-submarine warfare
... are trained to differentiate sounds with the time separation of those sounds shortened to test the bats' response. The bats humor us, says Simmons. They get mealworms if they behave. A major goal of ONRs bio-sonar research program is to duplicate the ability to differentiate between two echoes that arrive at...Insect yields clues to evolution of species
...tat may play a crucial role in the early stages of separation into different species (speciation). "We dont know why, but something about adapting to a host plant smell, size, or a combination of things drives this reproductive isolation," said Sandoval. "This is an example of speciation in process." Additi...Hot polymer catches carbon dioxide better
...29, 2002 - A new and economical technology for the separation and capture of carbon dioxide from industrial proc...vestigator for Los Alamos' carbon dioxide membrane separation project, presents data on a new polymeric-metallic membrane that is operationally stable at temperat...Physics tip sheet #20 July 3, 2002
...Cooper pairs. A new proposal suggests one possible separation method: send them down a pair of carbon nanotubes. Physical Review Focus: http://focus.aps.org/v9/st33.html Journal article: http://link.aps.org/abstract/PRL/v89/e037901 3) Atoms take negative time to cross a BEC U. V. Poulsen, K. Mlmer arXiv...'Rock-paper-scissors' preserves biodiversity in bacterial neighborhoods
...of a well-mixed flask - demonstrating that spatial separation may be necessary for different populations to coexist. "The scale at which organisms interact and disperse can have profound effects on the maintenance of biodiversity," says co-author Brendan Bohannan, an assistant professor of biological sciences a...Researchers suggests a potentially damaging effect of extremely low frequency electromagnetic fields
... genetic material (DNA). The second involves cell separation into two daughter cells. These steps are separated by two pauses or "gaps", the first occurs after cells have divided, but before the next round of DNA synthesis (G1) and the second between DNA synthesis and division (G2). These "gaps" allow the cell...UK scientists crack lobster shell colour puzzle
...y crystallography which requires crystals. Initial separation and isolation work by Dr Peter Zagalsky of Royal Holloway, University of London, yielded a sample of highly pure Crustacyanin which was then handed to crystal grower Dr Naomi Chayen of Imperial College London. Dr Chayen made use of the unique Microba...A laser-based spectometry screening tool may provide early and efficient detection of breast cancer
...tive contribution to the statistically significant separation between stages 0-I breast cancer patients and non-cancer controls. This same separation was observed with independent test data of patients with stages II and stage III breast cancer. A cr...What inspires yeast cells to divide?
...cleus: replication of the DNA, called S-phase, and separation of the resulting chromosomes into two groups, call...ht that the Cdc20 oscillator controlled chromosome separation as well as mitotic exit via elimination of Clb5, while the Cdh1 oscillator was thought to complete e...New compound may immobilize AIDS virus, certain radionuclides
...ides, which removes them from the mixture by phase separation for easier and safer storage. While previously known HPAs were made cheaply and easily at room temperatures and pressures, they were known to be stable only in acid environments. This behavior means they cannot function well in blood as antiviral age...DNA separation by entropic force offers better resolution
...id in their paper, might be a "cascade" of similar separation devices. These methods would also improve the resolution, they said. They predicted that such a device could separate DNA molecules "in a particularly challenging length range with higher resolution than any other known method." The principle of ent...NIGMS center grants will spice up chemical libraries
...ng the synthesis of libraries using fluorous phase separation strategies. "The intent of this initiative is to attract the best academic chemists to develop a wide range of versatile, dependable, library-related methods," said Dr. Judith H. Greenberg, acting director of NIGMS. "Ready access to these new meth...Large-scale climate change linked to simultaneous population fluctuations in arctic mammals
...and because their complete physical and ecological separation rules out the alternative explanations that have confounded previous studies of the role of climate in synchronizing population dynamics, leaving only weather as the controlling factor," Post explains. Previous research had focused either on a...UCSD research findings for human vs. mouse genome rearrangements
...ar species and lead to speciation, for example, to separation of human and mouse lineages," explained Pevzner. "The human and mouse genome sequences can be viewed as two decks of cards obtained by re-shuffling from a master deck--an ancestral mammalian genome." Because the mouse carries virtually the same set ......ing these molecular "clocks" according to dates of separation for other mammal lineages that have been established by the fossil record elsewhere around the world. The results refute two previously accepted models for how mammals colonized Madagascar. One model says mammals were already on Madagascar when the l...