Researchers found that larger sprocket sizes and higher chain tension can significantly increase bicycle drive train efficiency, while lubrication has a minimal impact. The study's results could have implications for other chain-driven devices, including conveyor belts and factory production lines.
The AAAS study recommends using federal funding for research on human stem cells, including embryonic stem cells already isolated in laboratories. However, the derivation of human stem cells should not receive federal funding due to public anxiety surrounding its process.
Thomas Holme, a chemistry professor and TV personality, receives the Helen M. Free Award for Public Outreach from the American Chemical Society for his efforts to increase public awareness of chemistry through TV appearances and local activities. His segments air on WTMJ-TV, reaching an audience of over 200,000 viewers since 1995.
A new study by researchers at the University of Georgia suggests that condom use can lead to closer and more intimate relationships. The study found that insisting on condom use sends a positive message to a partner, leading to greater respect, safety, and less regret after sex. However, the issue is often never discussed due to embarr...
A study found that over 80% of wild rats in the US have HEV antibodies, suggesting they are a natural reservoir for the virus. This raises concerns about the possibility of infected rats transmitting the virus to humans, although experts emphasize there is no evidence of human risk.
Research reveals highest species diversity of planktonic foraminifera in middle latitudes, contrary to traditional model. Sea-surface temperature can accurately estimate zooplankton diversity.
Jeff Wheelwright, a renowned environmental writer, has won the American Chemical Society's James T. Grady-James H. Stack Award for Interpreting Chemistry for the Public. His work aims to ease public fears about chemicals in the environment and promote understanding of chemistry.
A landmark study published in Science found no evidence of Porcine Endogenous Retrovirus (PERV) infection in 160 patients who received living pig tissue transplants. The study, which tested the safety of xenotransplantation, showed that pig tissue can survive in the human body for long periods with no ill effects.
Research finds that ship sulfur emissions contribute to acid rain, damage vegetation, and form clouds over the ocean. The study highlights the importance of addressing this issue for solving part of the global climate change puzzle.
Researchers developed a system that enables users to interact with a computer-controlled map using natural speech and hand gestures. The system recognizes spoken words and gestures, allowing users to locate buildings and parking lots on the Penn State campus.
A Mayo Clinic study reveals that centenarians who undergo surgery have a comparable survival rate to the general population, contrary to popular opinions. The researchers found that older individuals can recover quickly and do well after surgery with advancements in drugs and surgical techniques.
Researchers found that genetic variation significantly impacts an individual's sensitivity to estrogen, challenging traditional laboratory-animal-based safety tests. The study suggests that genetic makeup should be considered when prescribing estrogen and related hormones for medical purposes.
A study found that untreated hypothyroidism in pregnant women is associated with lower IQ scores in their children. Children of mothers treated for the condition showed similar intelligence levels to those born to healthy mothers. Early detection and treatment may mitigate the negative effects.
Scientists have developed a genetically engineered animal model of schizophrenia, displaying behaviors consistent with the disease. The new model targets NMDA receptors, which may lead to improved treatment options and better understanding of the illness.