Oxygen increase caused mammals to triumph, researchers say
...first, high resolution continuous record of oxygen concentration in the earth's atmosphere shows that a sharp rise in oxygen about 50 million years ago gave mammals the evolutionary boost they needed to dominate the planet, according to Paul Falkowski, Rutgers professor of marine science and lead author of a pape...Telling axons where to go and grow
...lopment of neuronal projections. Changes in LIMK1 concentration have an impact in neuronal growth cone actin dynamics and axon formation. The authors focus on the RING finger protein Rnf6 due to its similarity to the previously identified protein RLIM, which has been shown to bind to nuclear LIM domains and crit...WiCell receives $16 million NIH grant to create national stem cell bank
...osal ultimately selected by NIH. "Clearly having a concentration of world-class expertise in the biosciences, and in particular stem cell research on this campus, played a major role in NIH's selection of WiCell. These are scientists who are leading the way in stem cell research in our country and are constantly a...MERIS/AATSR Workshop looks at twin sensors with many uses
...l distribution as well as atmospheric water vapour concentration detection. Combining atmospheric information from both could be useful for atmospheric correction and improving overall data quality. One presentation by Hermann Mannstein of the German Aerospace Center (DLR) recounted how AATSR is being used to det...Joslin study sheds light on birth defect cause in pregnant women with diabetes
...r one day in cages containing 12 percent oxygen a concentration that did not cause any stress to the mothers, but which might significantly reduce the amount of oxygen delivered to the uterus instead of 20 percent oxygen contained in room air at sea level) had the same effect as high glucose. In fact, embryos f...North Sea efficient sink for carbon dioxide
...surface area. The measured annual increase in the concentration of carbon dioxide (CO2) in the atmosphere is only .... The 'physical pump' works as a result of the CO2 concentration in the atmosphere being higher than that in the seawater. As nature always tries to restore the bala...'Acid rain' and forest mass: Another perspective
...grouping together of herds, have given rise to the concentration of ammonia emissions in certain zones. This compound, deposited close to the sources of emission, is able to react with the acidic ions deposited at the same time. Subsequently, certain bacteria are capable of oxidising the compound, thus forming nit......al motion of the filaments, unless the crosslinker concentration exceeds a certain threshold value. The latter valu...mit of a large filament number. As the crosslinker concentration is lowered, the bundles may segregate into small sub-bundles, or undergo abrupt unbinding transition...New genetic test can detect clam disease
...become deadly to clams until it reaches a critical concentration in the water. Gast notes that although red tide got a lot of media attention this year, QPX is actually a bigger problem. The toxins that cause red tide in clams and other shellfish in New England do not kill the shellfish and will wash away once......(pH-value of about 11) with an extremely high salt concentration (over 300 grams of salt per litre of water). The h...sms, halophile archaea have an extremely high salt concentration inside of their cells. These levels of salt concentration cannot usually support proteins, the criti...Entire lakes feel effects of climate warming, University of Alberta study shows
...d. In this case, they found major increases in the concentration of chlorophyll a--a good indicator of overall ecosystem production. The research is published in the current issue of Geophysical Research Letters. What is alarming about these findings is the magnitude and the timing of the changes, says Michelutti....Dust storms may carry bacteria to Japan from China
...owing the bacteria in a culture medium with a salt concentration of at least 20%. Their results show that approxim... bacteria thrive in environments where the average concentration of salt is 3-15%. The salt concentration in the soil the authors analysed was 20 to 100 times lower ...Go with the flow: How cells use biological flows to signal and organize
...esence, outside the cell, of minute changes in the concentration of special proteins called morphogens. Cells can sense even the tiniest differences in morphogen concentration and will alter their functions accordingly. In embryonic development, stem cells differentiate into ...Modifications render carbon nanotubes nontoxic
...ty of different compounds, scientists look for the concentration -- typically measured in parts per million or parts per billion -- of materials that lead to the death of 50 percent of the cells in a culture within 48 hours. In the current study, CBEN researchers exposed skin cell cultures to varying doses of four...JCI table of contents November, 2005
...rites that this paper shows that changes in oxygen concentration can have effects on nNOS enzyme activity and gene expression that contribute to vascular homeostasis under conditions of acute and chronic hypoxia. TITLE: Hypoxia Induces a Functionally Significant and Translationally Efficient Neuronal Nitric Oxid...UV measurement tool aids defense against microbes in tap water
... a reduction in chlorine use, which will lower the concentration of chemical byproducts found in the water supply and help to meet the new byproduct standards, in addition to the Crypto regulations. Similar to the more familiar Giardia parasite, which often infects hikers who drink untreated water, Crypto can be t...Compound in wine reduces levels of Alzheimer's disease-causing peptides
...d in high concentrations in red wines. The highest concentration of resveratrol has been reported in wines prepared from Pinot Noir grapes. Generally, white wines contain 1% to 5% of the resveratrol content present in most red wines." One of the characteristic features of Alzheimer's disease is the deposition of ...Modern technology helps shed light on illnesses in artists of the past
...uld have identified high levels of serum digitalis concentration and serum thujone concentration in van Gogh, thereby confirming excessive ingestion of these two products. Cellini Benvenuto Celli...Ozone levels may raise risk of underweight births
...crease of 1.4 parts per million of carbon monoxide concentration during the first trimester was associated with 21.7 g (about .05 pound) decrease in birth weight and a 20 percent increase in risk of intra uterine growth retardation. Ozone, or O3, is a gas made up of three oxygen atoms. Although a natural layer of ...Recycled or revamped therapeutics find novel anti-cancer applications
...enter each cancer cell even when the extracellular concentration of arsenic is similar" Camacho explained. "This disrupts the mitochondria and kills the cancer cell. Some cancer cells that seem "resistant" to arsenic trioxide are killed by ZIO-101." ZIO-101 also trips up growth of cancer cells stopping them from...