Researchers at the University at Buffalo found a link between specific sperm abnormalities and low pregnancy rates. They discovered that samples with premature chromosomal decondensation or acrosome reactions had only a slim chance of leading to a pregnancy.
Researchers found a spherical object in the Khohar chondrite containing fine-grained metal aggregate and graphite. The graphite exhibits large D and 15N excesses, suggesting an interstellar origin, and is abundant with coexisting metal particles. These findings provide evidence of interstellar graphite in meteorites.
Scientists identify a common gene family responsible for generating rhythmic electrical impulses in both the brain and heart. This discovery could lead to the development of screening tests and therapeutic applications for cardiac and neurological disorders.
A computer model predicts reliably the severity and timing of drought episodes six months in advance, helping farmers choose drought-tolerant crops and minimizing economic losses. The researchers also highlight the need to maintain adequate river levels to prevent barge traffic disruptions and ensure water supply.
A study published in Nature Genetics found that mice deficient in a stress hormone receptor exhibit reduced anxiety and improved stress response. The research suggests that new drugs suppressing the receptor's function may be effective in treating depression and anxiety.
Wendy Raymond has received a three-year NIH grant to study cell division regulation in yeast using genetic and molecular approaches. Her research focuses on the role of CDC-14 in exit from mitosis, building on serendipitous findings from her 1997 winter study class.
Penn State researchers investigate the ionosphere and atmospheric sodium using a six-minute rocket flight. They aim to determine if sodium can be used as a tracer of atmospheric motion and understand its relationship with sodium ions.
Researchers found that aspirin inhibits angiogenesis in tumor cells by blocking COX-2 enzyme production, which prevents the formation of blood vessels. Additionally, aspirin also targets COX-1 enzyme in endothelial cells, forming new blood vessels.
Scientists successfully used gene therapy to correct deafness in shaker-2 mice by identifying a recessive mutated gene responsible for the condition. The study's findings also revealed that the mutation affects a myosin enzyme involved in inner ear development, which is crucial for hearing.
A 20-acre Pennsylvania watershed was extensively measured in the 1970s, providing valuable data for calibration of runoff models. The study revealed differences in water behavior between south- and north-facing slopes, with implications for understanding small-scale hydrology.
The American Urological Association's 93rd Annual Meeting featured groundbreaking research on prostate cancer, erectile dysfunction, and kidney diseases. Researchers presented studies showcasing the importance of PSA testing in African American men and the effectiveness of sildenafil in treating erectile dysfunction.
Researchers have developed a unique antenna design called the Orlan antenna to provide communications and vital signs for astronauts on the International Space Station. The antenna's special loop design couples sufficient energy to transmit radio-frequency signals while minimizing reflections.