Discovery of fossil mollusks in Alaska links histories of Arctic Ocean and Isthmus of Panama
...e that the flow of water through the strait, which separates Russia and Alaska, was reversed from southward to northward by the uplifting of the Isthmus. He also is the first to date the flow shift. Marincovich's findings also validate computer models of Northern Hemisphere oceanography for that time period...New technique improves accuracy of gene tests
...tated gene. The new technique separates the two copies enabling each to be analyzed independently. It does this by fusing human cells with mouse cells such that in some fusions only one human chromosome of a pair enters the same m...Hopkins reports new technology to unmask hidden gene mutations
...tially mutated genes at the same time. Conversion separates the two copies of the gene, allowing them to be individually analyzed. "With current tests, if a portion of a gene was deleted, that deletion mutation could be masked or hidden by the normal copy of the gene. By separating and looking at each c...Pitt team first to illustrate mechanisms of chromosome missegregation in cancer cells
...ells, form at the poles. The interior of the cell separates in barbell-like fashion with a narrow bridge that eventually pinches in two to form the two daughter cells. Using fluorescent markers to label cell structures involved in the division of oral cancer cells, the Pittsburgh team is t...The evolution of the sex chromosomes: step by step
...books, hail from differentplanets, but what really separates them are radically different chromosomes --with two Xs you're a female, with one X and a tiny Y, a male. No other pair ofchromosomes is nearly as diverse. How did the sex chromosomes become sodissimilar? In the October 29 issue of <AHREF="http://...Harvard Medical School researchers discover first in a new class of mitosis inhibitors
...the mitotic spindle, a finely tuned structure that separates the twosets of chromosomes during cell division. At the same time, any mitoticinhibitor represents a potential starting point for developing betterchemotherapeutics, Mitchison says. With luck, monastrol could lead to a drug aseffective as taxol but w...MTU researchers develop new software to help clean up contamination sites
...on, in which a solid surface known as an adsorbent separates the pollutant from the contaminated air or water. The software package, known collectively as Environmental Technologies DesignOption Tool, or ETDOT, includes a database of more than 600 polluting chemicals,including volatile organic compounds (VOCs)...New marking system gives scientists first real view of immune memory cells
...geneis blocked by an intervening piece of DNA that separates it from the promoter. The scientists engineered into these same mice a second gene (CRE recombinase)that transiently turns on in the cells activated by virus infection. Thisrecombinase recognizes the intervening DNA sequence and clips it out, thusco...BNL Scientists Report On A Natural Cleanup Solution For Polluted Soil & Incinerator Ash
...ndco-inventors of the process. "Since the process separates the metals from theradioactive elements, the problem of mixed toxic-radioactive waste disposal issolved, the amount of waste is diminished greatly, and it's possible to reclaimthe metals for a beneficial use." Among the metals that can be sep......rdal plate) that patterns theventral forebrain and separates the initial eye field into bilateral eyes. Failure of these processes results in a reduced forebrain and cyclopia (fused eyes). Cyclopia appears not only in animals such as the zebrafish, but also in humans who develop a syndrome called holoprosencep...Breakthrough: Scientists Create 3-D Map Of Cell Membrane Ion Pump At Near Atomic Resolution
...ag" that holds human and animal cells together and separates them from neighboring cells. Theresearchers did it by crystallizing the membrane and studying it under electronmicroscopes. Their work is a basic science breakthrough, the investigators say,because of the great difficulty involved and the imp......point in which each member of the chromosomal pair separates and migrates tothe distant cellular poles. A new cell membrane forms between the chromosomalclumps, and mitosis concludes with the formation of two identical daughtercells, each containing an intact copy of the parent cell's genetic information. ...Widespread Genus Of Monkeys Gives Up Genealogical Secrets To Columbia Researchers
...98 issue of theJournal of Human Evolution, clearly separates the Barbary ape of Morocco andAlgeria from the Asian macaques and finds no particular genetic affinity of theAsian long-tailed macaques with other members of a species group that bears itsname. The researchers advocate abolishing that species group ...