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Science News Archive August 2014 - Page 3


Page 3 of 31

Non-adaptive evolution in a cicada's gut

Researchers have discovered that cicadas' gut bacteria split into two species about 5 million years ago, leaving them reliant on double the species to create essential nutrients. This event is an example of non-adaptive evolution, where genetic change occurred by chance without clear benefits for the organism.

SourceCIFAR·JournalCell·DateAug 28, 2014

Saddam Hussein -- a sincere dictator?

A new study analyzing Saddam Hussein's private transcripts reveals a striking similarity between his public and private beliefs on international affairs. The researchers found that while public speeches were often straightforward, private discussions exhibited more complexity and nuanced views, particularly on the US, Iran, and Israel.

SourceSAGE·JournalResearch & Politics·DateAug 28, 2014

Dyslexic readers have disrupted network connections in the brain

Researchers mapped the circuitry of dyslexia using functional neuroimaging tools, revealing widespread differences in brain connectivity among dyslexic readers. They found decreased connectivity within the visual pathway and between visual and prefrontal regions, as well as increased right-hemisphere connectivity.

SourceElsevier·JournalBiological Psychiatry·DateAug 28, 2014

How the zebrafish gets its stripes

Researchers have discovered the origin and behavior of pigment cells that form zebrafish stripes. The yellow cells undergo dramatic changes in cell shape to tint the stripe pattern, while silvery and black cells switch shapes to create a striking contrast between golden and blue colors.

SourceMax-Planck-Gesellschaft·JournalScience·DateAug 28, 2014

UTHealth researchers find up to 3,000 times the bacterial growth on hollow-head toothbrushes

UTHealth researchers discovered that hollow-head toothbrushes harbor up to 3,000 times more bacteria than their solid-head counterparts. The study's findings highlight the importance of choosing a solid-head power toothbrush to minimize bacterial growth and prevent disease transmission.

SourceUniversity of Texas Health Science Center at Houston·JournalJournal of dental hygiene science·DateAug 28, 2014

Inter-dependent networks stress test

Interdependent networks, such as energy production systems, are more vulnerable to cascading failures due to one-directional connections. The study found that redundancy in connections can impact robustness, with less reliable systems operating near critical thresholds.

SourceSpringer·JournalThe European Physical Journal B·DateAug 28, 2014

Recognition for Monash rheologist

Renowned Monash rheologist Professor Tam Sridhar has been awarded the ASR Medallion for his distinguished contributions to rheology science and technology. He is the fifth recipient of this award in the past 20 years, recognizing his exceptional service to the field.

From nose to knee: Engineered cartilage regenerates joints

Researchers have successfully engineered cartilage tissue using nasal septum cells, showing promising results in repairing articular cartilage defects. The treated patients' knees were replaced with the engineered cartilage grafts, demonstrating the potential of this innovative clinical treatment for cartilage damage.

SourceUniversity of Basel·JournalScience Translational Medicine·DateAug 28, 2014

Indoor mold poses health risk to asthma sufferers

A new study published in the Journal of Allergy and Clinical Immunology has found that indoor mold can lead to breathing problems and increase the likelihood of developing asthma. The research highlights the importance of adequate heating, ventilation, and home maintenance to reduce mold growth and its effects on health.

SourceUniversity of Exeter·JournalJournal of Allergy and Clinical Immunology·DateAug 28, 2014

How does it feel to be old in different societies?

A new study published in Psychology and Health found that people aged 70 and over who identify themselves as 'old' feel worse about their own health in societies where they perceive lower value than younger age groups. In contrast, higher social status for older adults is linked to better subjective health.

SourceUniversity of Kent·JournalPsychology & Health·DateAug 28, 2014

Synthesis produces new antibiotic

Rice University scientists have successfully synthesized a newly discovered natural antibiotic, viridicatumtoxin B, which shows potent activity against Gram-positive bacteria. The simplified synthesis of this compound may pave the way for developing more effective antibiotics against superbugs.

SourceRice University·JournalJournal of the American Chemical Society·DateAug 28, 2014

A VA exit strategy

A recent Perspective piece in the New England Journal of Medicine suggests that the US may no longer need a separate, expensive VA healthcare system for its rapidly shrinking veteran population. The authors propose transitioning out of the hospital business while continuing to provide specialized services like mental health and rehabil...

SourceThe Geisel School of Medicine at Dartmouth·JournalNew England Journal of Medicine·DateAug 28, 2014

Nanoscale assembly line

Researchers at ETH Zurich have developed a nanoscale assembly line that uses mobile assembly carriers and biological motors to assemble complex substances. The system, which is three times thinner than a human hair, enables the selective modification of organic molecules and the assembly of nanotechnological components.

SourceETH Zurich·JournalLab on a Chip·DateAug 28, 2014

New tool aids stem cell engineering for medical research

Researchers have created an online analytic platform called CellNet to aid stem cell engineering. The tool uses network biology methods to analyze and predict cell fate and corresponding engineering strategies, offering a reliable shortcut for drug development and individualized cancer therapies.

SourceMayo Clinic·JournalCell·DateAug 28, 2014

The universal 'anger face'

The 'anger face' is a cross-culturally universal facial expression that employs seven distinct muscle groups to signal the emotional state of anger. Researchers found that each component of the face makes an individual appear physically stronger, suggesting it evolved as a threat display to intimidate others.

SourceUniversity of California - Santa Barbara·JournalEvolution and Human Behavior·DateAug 28, 2014

Study finds shortcomings in doctor-patient discussions about transplantation

A study of dialysis patients found that clinicians' reported discussions about transplantation did not increase patients' likelihood of being listed, despite patient-reported discussions being associated with a nearly 3-fold increased chance. The findings suggest the need for improved patient communication and informed consent.

SourceAmerican Society of Nephrology·JournalJournal of the American Society of Nephrology·DateAug 28, 2014

This is your brain's blood vessels on drugs

A new method developed by researchers from Stony Brook University and the U.S. National Institutes of Health uses optical coherence Doppler tomography to image how cocaine disrupts blood flow in mouse brains. The technique provides high-resolution images of capillary flows, shedding light on the effects of cocaine on brain physiology.

SourceOptica·JournalBiomedical Optics Express·DateAug 28, 2014

Electric current to brain boosts memory

Researchers at Northwestern University used Transcranial Magnetic Stimulation to improve memory in healthy adults, showing that specific brain regions can be stimulated to enhance learning abilities. The study's findings have potential applications for treating conditions like Alzheimer's disease and traumatic brain injury.

SourceNorthwestern University·JournalScience·DateAug 28, 2014