Scientists have pinpointed a protein called plethodontid receptivity factor (PRF) that directly influences female receptivity in salamanders, shortening the courtship time by 15%,. This discovery highlights the importance of pheromones in survival and provides insights into the evolution and mechanism of action of these complex chemicals.
Researchers found that aged varnish molecules contribute to the typical yellow discoloration of old-master paintings. The study suggests that larger molecules in the varnish layer are harder to dissolve during restoration processes.
Researchers find geochemical signature in iron indicative of life, allowing for tracing of microbial populations across time and space. The technique could help resolve disputes about past life on Mars and provide insight into the evolution of life on Earth.
A new material featuring 'buckyball shards' has shown promise for chemical separations, suggesting a cheaper method for generating enriched oxygen and nitrogen. The material could be useful for the biotechnology industry to concentrate proteins in watery broths.
The US dietary supplement market is projected to reach $14 billion in 2000, with most supplements being unregulated. Dr. Steven H. Zeisel proposes creating a special 'nutraceuticals' category for regulated supplements that deliver concentrated forms of bioactive agents beyond food levels.
Researchers have identified a genetic mutation associated with an increased risk of prostate cancer in African-American and Latino men, with a five times greater risk compared to those without the mutation. The mutation affects the enzyme steroid 5a-reductase, leading to increased production of dihydrotestosterone, a potent form of tes...
Researchers at Wistar Institute find parallels between PRD1 and human adenovirus coat protein structures, suggesting an evolutionary relationship. The discovery may lead to new research areas and therapies.
Sulindac has been shown to cause the regression of benign colon polyps, helping prevent colon cancer development. The drug inhibits cancer cell growth by promoting programmed cell death and preventing NF-kB activation.
Researchers have developed a new pain observation scale called APocis, allowing healthcare professionals to accurately assess pain levels in young children. The scale records seven types of behavior related to pain, enabling doctors and nurses to determine the level of medication needed for effective pain management.
Two newly identified metabolites of the gasoline additive MTBE have been found in human urine samples. These findings suggest that humans are exposed to MTBE and its byproducts through inhalation, and that further research is needed to understand their impact on human health.