Unsere Seite auf

Chemiker.info - Tagesaktuelle Nachrichten aus Chemie und Wissenschaft

  • Researchers find 3-million-year-old landscape beneath Greenland ice sheet
    [NEWS] maria-jose.vinasgarcia@nasa.gov 301-614-5883 NASA/Goddard Space Flight Center Glaciers and ice sheets are commonly thought to work like a belt sander. As they move over the land they scrape off everything - vegetation, soil and even the top layer of bedrock. So a team of university scientists and a NASA colleague were greatly sur…
  • Warm US West, cold East: A 4,000-year pattern
    [NEWS] lee.siegel@utah.edu 801-244-5399 University of Utah Global warming may bring more curvy jet streams during winter SALT LAKE CITY, April 16, 2014 - Last winter's curvy jet stream pattern brought mild temperatures to western North America and harsh cold to the East. A University of Utah-led study shows that pattern …
  • New species discovery sheds light on herbivore evolution
    [NEWS] onepress@plos.org 415-590-3558 PLOS Fossil extends knowledge on caseid eating habits and time period A new fossil may provide evidence that large caseid herbivores, the largest known terrestrial vertebrates of their time, evolved from small non-herbivorous members of that group, according to a study published April 16, 2014 in t…
  • Nutrient-rich forests absorb more carbon
    [NEWS] leitzell@iiasa.ac.at 43-223-680-7316 International Institute for Applied Systems Analysis The ability of forests to sequester carbon from the atmosphere depends on nutrients available in the forest soils, shows new research from an international team of researchers including the International Institute for Applied Systems Analysis (IIASA). …
  • Climate change: The role of oceanic carbon reservoir over glacial cycles
    [NEWS] pxwang@tongji.edu.cn Science China Press Glacial cycles at 104-yr time scale have been the focus of Quaternary paleoclimatology over the last century. In recent years with the emergence of continuous high-resolution records (ice cores, deep-sea sediments etc.) from the longer geological past, increasing evidence underscores the significance of …

  • Antimicrobial Chemical Linked to Breast Cancer

    Image: Keerati FreeDigitalPhotos.net

    Researchers have discovered that the antimicrobial agent triclosan promotes breast cancer cell growth. Triclosan is used in antibacterial soaps, deodorants, cosmetics, toothpaste, and other household products. Triclosan chemicals function similarly to hormones and cause endocrine system disruptions.

    In the study, it was discovered that triclosan and another endocrine-disrupting chemical, octylphenol, disrupt genes related to breast cancer cell growth. This interference results in the proliferation of breast cancer cells. Long term use of products containing triclosan result in the accumulation of the chemical in the body over time. Due to concerns over other health related issues associated with triclosan, major manufacturers have already begun to remove the chemical from their products.

    Learn more about this study:

    Antimicrobial Chemical Linked to Breast Cancer originally appeared on About.com Biology on Wednesday, April 23rd, 2014 at 11:22:17.

    Permalink | Comment | Email this

  • Cancer Cell Gene Activity

    This shows dividing human cancer cells as visualized by fluorescence microscopy.
    Image: Aki Endo (Lamond Lab)

    Researchers have used fluorescence microscopy to visually demonstrate gene activity in cancer cells during the cell cycle. Cancer cells divide uncontrollably and may develop as a result of several factors, including recombination errors that occur during the cell cycle and infections from certain cancer viruses.

    According to head researcher Angus Lamond, "What we have been able to produce is a detailed analysis of protein activity in human cancer cells that exceeds what was previously possible. Previously it has been possible to capture a time-averaged snapshot of this activity, but what we can now do is give a much fuller picture." The researchers state that this new high-resolution mapping of gene expression will provide valuable insight into protein production in cancer cells. Information gained from the detailed study of cancer cell protein activity could lead to the development of better cancer drugs.

    Learn more about this study:

    Cancer Cell Gene Activity originally appeared on About.com Biology on Friday, April 18th, 2014 at 06:00:21.

    Permalink | Comment | Email this

  • Preventing Flu Virus Replication

    Influenza Virus Particles
    Image: CDC/Frederick Murphy

    With influenza viruses developing resistance to current antiviral drugs, it is increasingly important that new antiviral drugs be developed. University of Texas at Austin researchers have identified a protein in influenza A viruses that could be a potential target for new antiviral drugs. When viruses infect cells, they use the host's own genetic machinery to make more virus particles. The body responds with its own antiviral protein DDX21, which blocks the viral replication process. The influenza A virus then counters with the viral protein NS1, which blocks DDX21 and allows viral replication to continue.

    Robert Krug, an author on the study states, "If you could figure out how to stop NS1 from binding to DDX21, you could stop the virus cold." The researchers found that DDX21 binds to a viral protein called PB1, which is needed for replication. When the viral protein NS1 blocks DDX21, PB1 is then free to promote viral replication. Potentially, antiviral drugs that target NS1 could be developed to prevent flu virus replication.

    Learn more about this study:

    Preventing Flu Virus Replication originally appeared on About.com Biology on Thursday, April 17th, 2014 at 10:05:52.

    Permalink | Comment | Email this

  • Regenerating Living Organs

    University of Edinburgh researchers have accomplished something that has not been done before. They have successfully regenerated a living organ: the thymus. The thymus is a small glandular organ that produces specific immune cells called lymphocytes. The thymus normally deteriorates and shrinks with age. In the study, the researchers were able to reactivate the thymus in mice by increasing the levels of a specific protein. The protein, FOXN1, induced certain cells to rebuild the thymus.

    According to researcher Dr. Rob Buckle, "This interesting study suggests that organ regeneration in a mammal can be directed by manipulation of a single protein, which is likely to have broad implications for other areas of regenerative biology." The researchers are hopeful that information gained from this study could be used to develop new treatments for individuals with dysfunctional immune systems.

    Learn more about this study, see:

    Regenerating Living Organs originally appeared on About.com Biology on Thursday, April 10th, 2014 at 13:26:14.

    Permalink | Comment | Email this

  • Invention of the 'Mini Heart'

    Human Heart
    Image: Dream Designs FreeDigitalPhotos.net

    George Washington University researchers have invented a new organ that aids in blood circulation. This organ functions as a 'mini heart' by helping blood to flow in veins with non-functioning valves. The 'mini heart' is a cuff of cardiac muscle cells that is able to contract to help pump blood through the venous portion of the cardiovascular system.

    According to researcher Narine Sarvazyan, "We are suggesting, for the first time, to use stem cells to create, rather than just repair damaged organs. We can make a new heart outside of one's own heart, and by placing it in the lower extremities, significantly improve venous blood flow." The ability to create a new organ from a person's own adult stem cells represents an advancement in tissue engineering technology.

    Learn more about this study, see:

    Invention of the 'Mini Heart' originally appeared on About.com Biology on Monday, April 7th, 2014 at 05:00:25.

    Permalink | Comment | Email this