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Science News for October 7, 2014


Back off: Female chimps stressed out by competing suitors

A study of wild East African chimpanzees found that females with high levels of male competition experience lower C-peptide levels, indicating energy deficit and potential weight loss. This can negatively affect their reproductive ability and fertility rates.

SourceSpringer·JournalBehavioral Ecology and Sociobiology·DateOct 7, 2014

Can physical therapy before hip or knee replacement surgery improve outcomes?

A new study found that prehabilitation physical therapy before joint replacement surgery can significantly reduce the need for postoperative care. The research revealed a 29% reduction in postoperative care use among patients who received preoperative physical therapy, resulting in an adjusted cost savings of $1,215 per patient.

SourceAmerican Academy of Orthopaedic Surgeons·JournalJournal of Bone and Joint Surgery·DateOct 7, 2014

Study: Even motivated dieters need close access to healthy food

A new study from UMass Medical School and the Massachusetts Department of Public Health found that even highly motivated individuals struggle to change their diet if they need to travel far to access healthy food. The study suggests that community health programs should prioritize creating supportive neighborhood environments to facili...

SourceUMass Chan Medical School·JournalAmerican Journal of Preventive Medicine·DateOct 7, 2014

Acknowledging appearance reduces bias when beauties apply for masculine jobs, says CU-led study

A new study led by the University of Colorado Boulder found that acknowledging physical beauty can reduce bias against attractive women applying for masculine jobs. The study identified two types of sexism: hostile and benevolent, which are mitigated when applicants acknowledge their appearance or sex.

SourceUniversity of Colorado at Boulder·JournalOrganizational Behavior and Human Decision Processes·DateOct 7, 2014

Gastrostomy tube not advised for advanced dementia or other near end-of-life patients

The American Society for Parenteral and Enteral Nutrition recommends withholding or withdrawing gastrostomy tubes in patients with advanced dementia. Current scientific evidence suggests that tube feeding does not improve outcomes in this population, instead leading to high mortality rates.

Oral chelation for environmental lead toxicity

A study published in PLOS Medicine found that oral chelation therapy with dimercaptosuccinic acid (DMSA) reduced the amount of lead in blood of young children in Zamfara State, Nigeria. The treatment was associated with a significant reduction in venous blood lead levels, and no clinically severe adverse effects were reported.

SourcePLOS·JournalPLOS Medicine·DateOct 7, 2014

Small spills at gas stations could cause significant public health risks over time

Researchers found that small gasoline spills at gas stations can cumulatively harm soil and groundwater in residential areas, potentially impacting the health of those who use wells as a water source. The study suggests that these spills may be a larger issue than previously thought due to their frequency and cumulative effect.

SourceJohns Hopkins Bloomberg School of Public Health·JournalJournal of Contaminant Hydrology·DateOct 7, 2014

A universal Ebola drug target

A new study reports the discovery of a universally conserved drug target for Ebola, which can be used to develop effective anti-Ebola agents against all known species. The researchers have produced a peptide mimic that displays a functionally critical region of the virus, making it suitable for use in high-throughput drug screens.

SourceUniversity of Utah Health·JournalProtein Science·DateOct 7, 2014

Testosterone promotes prostate cancer in rats

A new study published in Endocrinology found that testosterone treatment increased the incidence of prostate carcinomas in rats. The research suggests that testosterone alone is a weak carcinogen in male rats and creates a hospitable environment for tumors to develop when combined with cancer-causing chemicals.

SourceThe Endocrine Society·JournalEndocrinology·DateOct 7, 2014

Timely Ebola information from Journal of Disaster Medicine & Public Health Preparedness

The Society for Disaster Medicine and Public Health is launching a special issue on Ebola, providing timely expert information to address the virus. The journal aims to translate science into practice, integrating medical and public health perspectives to effectively deal with major events.

SourceSociety for Disaster Medicine and Public Health, Inc.·JournalDisaster Medicine and Public Health Preparedness·DateOct 7, 2014

Sleeping in dentures doubles the risk of pneumonia in the elderly

A recent study published by the International Association for Dental Research found that sleeping in dentures doubles the risk of pneumonia in elderly individuals. The research, which followed over 500 seniors, identified that overnight denture wear was independently associated with a 2.3-fold higher risk of pneumonia incidence.

How female flies know when to say 'yes'

A study reveals that female fruit flies use a small number of excitatory neurons and neurotransmitters like acetylcholine to decide whether to accept or reject male courtship. The decision-making process is found to be generated in three brain regions, suggesting a complex circuit involving sensory inputs and neural signaling.

SourcePLOS·JournalPLOS Biology·DateOct 7, 2014

The unexamined diversity in the 'Coral Triangle'

Researchers have discovered a high level of biodiversity in the 'Coral Triangle', a region in the central Indo-Pacific Ocean known for its coral reefs. At least nine previously unreported species of zoantharians were identified, highlighting the need for further exploration and analysis of marine life in this area.

SourcePensoft Publishers·JournalZooKeys·DateOct 7, 2014

Talking to your car is often distracting

Two new studies found that using hands-free, voice-controlled automobile infotainment systems, such as Siri and MyLink, can divert attention from driving. The Toyota and Hyundai systems showed promise in being less distracting, while Apple's Siri was the most distracting, even when used as a hands-free device.

Advocating weight diversity

A new review article suggests that a 'weight-inclusive' approach should be used instead of the current 'weight-normative' approach, which emphasizes weight as a key factor in defining health and wellbeing. This shift would focus on social determinants of health and accept human diversity, including size diversity.

SourceUniversity of Kent·JournalJournal of Obesity·DateOct 7, 2014

I'll take that brain to go! Advancements in the transport of human brain samples and epilepsy research

Researchers at USC Viterbi School of Engineering developed a customized transport system, the Mobile Oxygen-Temperature Sustaining (MOTS) system, to preserve human brain samples for research. They also created a planar Multi-Electrode Array (MEA) that provides in-depth understanding of epileptic seizures.

SourceUniversity of Southern California·JournalJournal of Neuroscience Methods·DateOct 7, 2014

Researchers prefer citing researchers of good reputation

A study by Aalto University researchers found that a scientist's good reputation among colleagues increases the likelihood of citing their publications. The quality, not quantity, of publications builds authors' reputations, leading to a 'reputation boost'. This reinforces a research strategy beneficial for science and scientists alike.

SourceAalto University·JournalProceedings of the National Academy of Sciences·DateOct 7, 2014

Hypoglycemia link to HbA1c has declined in type 1 diabetes

A study of 37,539 children and young adults with type 1 diabetes found that the link between low average glucose blood levels and severe hypoglycemia declined substantially between 1995 and 2012. The relative risk for severe hypoglycemia decreased from 1.28 to 1.05 per 1% decrease in HbA1c levels, corresponding to a drop in risk of 1.2...

SourcePLOS·JournalPLOS Medicine·DateOct 7, 2014

Easy recipe to make bone and cartilage

Scientists at The University of Texas Health Science Center have developed a new method to generate mouse cells that can form bone and cartilage using small molecules. This approach offers great potential in the repair of bone defects through cartilage, with the ability to be scaled up for clinical purposes.

SourceThe Company of Biologists·JournalDevelopment·DateOct 7, 2014

Toddlers regulate behavior to avoid making adults angry

Researchers found that toddlers use visual and social cues to understand the motivations of people around them, and their impulsive tendencies influence their behavior. The study suggests that early self-control skills are crucial for children's development, with individual variability predicting later school readiness and behavior.

SourceUniversity of Washington·JournalCognitive Development·DateOct 7, 2014

Fundamentals of physics confirmed

Researchers at Technische Universität Darmstadt confirm time dilation and observe spectral lines in highly charged bismuth ions, achieving unprecedented precision. The experiments test the limits of Einstein's theories under extreme conditions, providing new insights into quantum electrodynamics.

SourceTechnische Universitat Darmstadt·JournalPhysical Review Letters·DateOct 7, 2014