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Science News Archive April 2005 - Page 3


Page 3 of 14

Relatively few US adults report having a healthy lifestyle

A study of over 153,000 US adults found that only three percent maintain a healthy lifestyle with all four characteristics: nonsmoking, healthy weight, and regular physical activity. Most Americans fail to meet even one of these key habits, highlighting the need for comprehensive prevention activities.

SourceJAMA Network·JournalArchives of Internal Medicine·DateApr 25, 2005

Waste not, want not

A team of researchers from Penn State University has developed a bacteria-driven cell that produces hydrogen for fuel while simultaneously cleaning wastewater. The innovation utilizes a microbial fuel cell to harness the power of microorganisms to generate electricity and purify water.

SourceU.S. National Science Foundation·JournalEnvironmental Science & Technology·DateApr 25, 2005

Data suggest bypass surgery free of long-term brain effects

A study suggests that CABG surgery may cause mild and transient cognitive changes in some patients, but these effects do not persist beyond three months. The authors argue that the procedure is improving and that the population undergoing surgery is becoming older and sicker, which may contribute to the observed cognitive deficits.

SourceWiley·JournalAnnals of Neurology·DateApr 25, 2005

Insulin-producing cells from brain cursors

Researchers at Stanford University have successfully differentiated human neural progenitor cells into insulin-producing cells that can respond to glucose. These cells were then transplanted into immunocompromised mice and produced human insulin when stimulated by glucose, paving the way for potential treatment of type I diabetes.

SourcePLOS·JournalPLOS Medicine·DateApr 25, 2005

Reducing malarial transmission in Africa

A randomized trial in Uganda found a six-dose regimen of co-artemether significantly reduced gametocyte levels and mosquito infectivity. However, limitations include patient compliance and absorption issues.

SourcePLOS·JournalPLOS Medicine·DateApr 25, 2005

DNA solves mystery of Gibraltar's macaques

Research using mitochondrial DNA identified two distinct populations in Algeria and Morocco as founders of the Gibraltar macaque population. The study found that the Gibraltar macaques retained a surprisingly high level of genetic variability despite long-term isolation.

SourceField Museum·JournalProceedings of the National Academy of Sciences·DateApr 25, 2005

Every birth and death must be counted

A third of babies born each year are unregistered, lacking legal rights to healthcare and education. Universal birth registration is key to collecting data on health inequalities and promoting equity.

SourcePLOS·JournalPLOS Medicine·DateApr 25, 2005

Risk scores may identify young individuals with atherosclerosis

Researchers developed a risk score based on age, sex, smoking, and obesity to identify young people with advanced atherosclerotic lesions. The study found that high-risk adolescents and young adults can benefit from targeted advice and lifestyle changes to reduce their long-term cardiovascular disease risk.

SourceJAMA Network·JournalArchives of Internal Medicine·DateApr 25, 2005

A human parasite with a streamlined mitochondrion

The Entamoeba mitosome, a human parasite's organelle, contains a single type of protein that imports and exports chemicals. This streamlined organelle may represent the simplest mitochondrion yet described, offering insights into eukaryotic cell function.

SourceCell Press·JournalCurrent Biology·DateApr 25, 2005

Monoclonal antibody cures West Nile virus-infected mice

Scientists have discovered a humanized monoclonal antibody that can boost survival rates of infected mice to 90% or higher. The antibody, produced by Macrogenics Inc., has potential utility against other infectious diseases and could help develop new treatments for related viruses like dengue fever.

SourceWashU Medicine·JournalNature Medicine·DateApr 24, 2005

High levels of immunosuppressant may lead to tumor recurrence

Research finds that high cyclosporine levels are associated with increased risk of hepatocellular carcinoma (HCC) recurrence after liver transplantation. The study suggests tailoring immunosuppressive schedules to individual patients based on their tumor biology, and recommends minimizing exposure to cyclosporine to prevent recurrence.

SourceWiley·JournalLiver Transplantation·DateApr 22, 2005

Method holds promise in identifying markers of non-metastatic vs. metastatic breast cancer

A new study using microarray technology has identified genes that distinguish between non-metastatic and highly metastatic breast cancer tumors. The research, led by Dr. David Tarin, used cell lines with varying capabilities to spread to distant organs and found that several genes were altered in expression patterns between the two typ...

SourceAmerican Journal of Pathology·JournalAmerican Journal Of Pathology·DateApr 22, 2005

Living metals

A research team from the Max Planck Institute for Metals Research and ESRF observes temporal structural fluctuations on an atomic scale in a crystalline material. The discovery sheds light on how materials respond to external perturbations like changes in temperature, pressure, magnetic or electric fields.

Microbial fuel cell: High yield hydrogen source and wastewater cleaner

A new microbial fuel cell process can produce high yields of hydrogen from biodegradable organic matter in wastewater. This technology uses a small amount of electricity to boost bacterial fermentation, overcoming the 'fermentation barrier' and producing clean hydrogen gas while simultaneously cleaning the wastewater.

SourcePenn State·JournalEnvironmental Science & Technology·DateApr 22, 2005

May-June GSA Bulletin media highlights

The May-June GSA Bulletin issue explores phosphogenesis and organic-carbon preservation in the Miocene Monterey Formation at Naples Beach, California. Researchers propose a corollary to the Monterey hypothesis suggesting major sinks of organic matter are located in continental sediments.

SourceGeological Society of America·JournalGeological Society of America Bulletin·DateApr 21, 2005

Neural tube defects decrease with folic acid fortification

Researchers found a significant decrease in spina bifida and anencephaly rates in Chile between 2001-2002, following folic acid fortification. The study suggests that the fortification is responsible for the decline, as similar trends were observed in other countries with folic acid fortification.

SourceWiley·JournalAmerican Journal of Medical Genetics·DateApr 21, 2005

May GEOLOGY media highlights

The May GEOLOGY media highlights featured articles on the preservation of a unique coal-bearing succession in the Pennsylvanian Joggins Formation and the role of evaporite withdrawal. Seismic profiles also showed that layers of salt were able to flow and rise to the surface, leading to subsidence and preservation. Additionally, researc...

SourceGeological Society of America·JournalGeology·DateApr 21, 2005

Creswell rock art dated

Scientists from Bristol, The Open and Sheffield Universities have dated the engravings at Creswell Crags to over 12,800 years old, making them Britain's oldest rock art. The dating method used uranium-series dating, which measures minute traces of radioactive uranium in thin limestone crusts that formed over the engravings.

SourceUniversity of Bristol·JournalJournal of Archaeological Science·DateApr 21, 2005

San Fernando, Northridge quakes may be maximum

A new study published in Geology estimates the maximum possible earthquake magnitude in the San Fernando and Northridge areas of Los Angeles County. The researchers used paleomagnetism to analyze sediments and found that the crust is broken into blocks, limiting the maximum earthquake magnitude to around 6.8.

SourceOregon State University·JournalGeology·DateApr 21, 2005

Pregnant women with epilepsy face dilemma

Women with active epilepsy can have a healthy child if they continue treatment, but the risk of birth defects varies depending on the medication. The importance of individualized counseling and maintaining seizure control is emphasized to balance treatment effectiveness and potential risks.

SourceBlackwell Publishing Ltd.·JournalEpilepsia·DateApr 21, 2005