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Science News Archive August 2005 - Page 3


Page 3 of 15

Hearing loss in older adults may compromise cognitive resources for memory

A recent study published in Current Directions in Psychological Science found that hearing loss in older adults can compromise cognitive resources for memory. The research suggests that the extra effort needed to comprehend words detracts from the cognitive processes involved in memorization. This highlights the importance of sensitivi...

SourceBrandeis University·JournalCurrent Directions in Psychological Science·DateAug 29, 2005

Writing at the nanoscale

Researchers at Brookhaven National Laboratory have developed a new method for creating nanoscale patterns and features on surfaces, known as Electro Pen Nanolithography (EPN). This technique allows for the creation of three-dimensional nanoscale landscapes and has potential applications in molecular electronics and biosensors.

Beilstein-Institut publishes first issue of new open access journal in organic chemistry

The Beilstein Journal of Organic Chemistry is a peer-reviewed online journal that covers all aspects of organic chemistry and related disciplines. It invites submissions from organic chemists worldwide, offering efficient refereeing, rapid publication, and high visibility, with no publication charges or copyright restrictions.

SourceBMC (BioMed Central)·JournalBeilstein Journal of Organic Chemistry·DateAug 28, 2005

Opiate drugs increase vulnerability to stress

A study by Gavan McNally and colleagues found that opiate users are more susceptible to stress-induced anxiety. The researchers tested rats with morphine or saline solution, then subjected them to restraint stress. The results showed that opiate-treated rats experienced greater anxiety responses, including reduced social interaction, a...

SourceAmerican Psychological Association·JournalBehavioral Neuroscience·DateAug 28, 2005

Shame, not guilt, related to substance-abuse problems

A study published in Addictive Behaviors suggests that shame, not guilt, is related to substance-abuse problems. The research found that individuals prone to shame may use alcohol and other drugs to cope with feelings of self-blame, while those who experience guilt are less likely to develop substance-use problems.

SourceUniversity at Buffalo·JournalAddictive Behaviors·DateAug 26, 2005

Gene expands malaria's invasion options

Researchers have identified two genes that enable P. falciparum parasites to switch from sugar-dependent to sugar-independent invasion of red blood cells. The PfRh4 gene is required for this switching mechanism, which provides the parasite with adaptability in the face of receptor changes and immune system responses.

SourceResearch Australia·JournalScience·DateAug 26, 2005

Proving Da Vinci right at the atomic level

Researchers tested a long-held friction theory using a quasicrystalline material, finding that friction along the periodic surface was significantly higher than along the aperiodic axis. The study's findings have implications for understanding the relationship between a material's structure and its frictional properties.

SourceDOE/Ames National Laboratory·JournalScience·DateAug 26, 2005

Sleeping sickness epidemic spreading in Uganda

A study found that mass treatment interventions in Uganda had no significant impact on reducing the prevalence of human infective T b rhodesiense parasites. Since 1998, over 428 new cases have been diagnosed in the Sorotic district, with an additional 300 cases likely going undiagnosed.

SourceThe Lancet_DELETED·JournalThe Lancet·DateAug 25, 2005

Locating crucial atoms in superconductors

Researchers at Cornell University have made a breakthrough in understanding superconductors by locating crucial atoms that increase conductivity but decrease it in localized spots. This discovery could lead to the development of more effective superconductors and unlock new materials for various applications.

SourceCornell University·JournalScience·DateAug 25, 2005

JCI table of contents September 1, 2005

Researchers have identified the Dido gene as a potential tumor suppressor in myelodysplastic/myeloproliferative diseases. Additionally, SOCS-7 has been found to regulate insulin signaling and enhance insulin action. Furthermore, aldose reductase expression has been linked to accelerated diabetic atherosclerosis in transgenic mice.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 25, 2005

The link between fasting and acute attacks of porphyria

A team of researchers has discovered a molecular missing link that explains why fasting brings on acute attacks of the genetic disease hepatic porphyria. Fasting increases levels of PGC-1a, which regulates the activity of an enzyme in the heme production pathway, leading to toxic buildup of precursor molecules.

SourceCell Press·JournalCell·DateAug 25, 2005

Insulin sensitivity gets a kick out of SOCS-7

The study found that SOCS-7-deficient mice have increased IRS protein levels and prolonged IRS activation, leading to enhanced insulin action and glucose homeostasis. The researchers also observed increased growth of pancreatic islets with elevated fasting insulin levels and hypoglycemia.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateAug 25, 2005