Evidence for sympatric speciation by host shift in the sea
...ing goby discovered in Papua New Guinea is closely related to another species of goby found in the same area and that the two species diverged from each other just a few hundred thousand years ago. The new goby species inhabits just one species of coral--one that is not used by any other goby species. Althou...Length of sex act in flies dictated by genetics
...erception in humans, a process that may be somehow related to measuring time elapsed in the act of mating by flies, Giebultowicz said. To understand how clock genes are involved in regulating the length of behavioral acts and short-term time perception will require further study, she said. This is the first ...PCB breakdown in rivers depends on sediment-specific bacteria, find Carnegie Mellon U. scientists
...pressing environmental challenge. A mixture of 209 related chemicals, PCBs accumulate in fish and birds high in the food chain, crippling their ability to reproduce. These agents also build up in humans, where they are suspected of harming reproduction, causing cancer, injuring the immune system and thyroid ...Managing occupational exposures to potential bioterrorist agents
...l defense and in infectious disease research. In a related article, also published in the August issue of the Journal of Occupational and Environmental Medicine, Rusnak and her colleagues reviewed the Institute's policies and management guidelines for occupational exposures to biological agents. Their purpos...Improved nutrition could reduce malaria burden worldwide
A large percentage of child deaths related to malaria are attributable to undernutrition and deficiencies of vitamin A, zinc, iron and folate, according to a new report by researchers with the Johns Hopkins Bloomberg School of Public Health. Their review of recent data from malaria endemic re...Heartless worms hold clues to cardiac arrhythmias, sudden death
...C. elegans seems an unlikely candidate for studies related to cardiac arrhythmias. After all, the microscopic...potassium channel called HERG (Human ether-a-go-go related gene). Many therapeutic drugs -- antihistamines, antidepressants, antibiotics -- block HERG, Peters......th more serious sleep disorders, many of which are related to circadian rhythms, say the scientists, who repo...es in the master clock. Incidentally, the problems related to jet lag and night shift work are often caused by the liver's inability to respond rapidly to chan...Embryonic stem cell therapy shows steady benefits in rebuilding infarcted heart
...concentrated in rich countries, ischemic heart and related cerebrovascular diseases alone caused an estimated 17 million or 23.2% of deaths globally in 2000, WHO reported. A contributing cause of what some have called a pandemic is that in contrast to many other organs in the body, the heart has only a min...New model can aid in understanding immune system diseases
...model that allows them to see biological functions related to Epstein-Barr within the context of a whole organism, said Gail Bishop, Ph.D., Distinguished Professor of Microbiology and Internal Medicine in the UI Roy J. and Lucille A. Carver College of Medicine and a research career scientist with the Departm...International symposium on nutritional genomics
...ity, who is identifying genes and genetic variants related to cholesterol metabolism and cardiovascular disease; Vanessa Northington-Gamble of Tuskegee University, who has written extensively of the use of human subjects for clinical research; and David Castle from the University of Guelph, Canada, who is de...Progress in breast cancer progression
...among women. The prognosis for cancer patients is related to the stage of the tumor. The latter stages are the most deadly as the tumors have become metastatic, meaning they have become mobile and are able to invade other tissues in the body. Understanding how tumors progress from early to later stages is...Putting energy into heart protection
...rapy for healing during or after a heart attack. A related commentary in this issue by D. Grahame Hardy from the University of Dundee places these data in the context of what is currently understood about the molecular mechanisms for altering energy use under conditions of stress and how these finding might...JCI table of contents, 16 August, 2004
...rapy for healing during or after a heart attack. A related commentary in this issue by D. Grahame Hardy from ...among women. The prognosis for cancer patients is related to the stage of the tumor. The latter stages are the most deadly as the tumors have become metastat...MICs shed light on prostate cancer
...urther investigated how soluble MIC level in serum related to prostate-specific antigen (PSA); PSA measurements are used as a biomarker for the presence of prostate cancer. Soluble MIC serum levels did not correspond with PSA serum levels, but they were highly correlative with high-grade and invasive tumor s...Genes can influence both alcohol consumption and dependence
... of alcohol consumption levels. However, problems related to alcohol aren't confined to dependent drinkers. Many alcohol-related problems like road trauma and high blood pressure occur in those who are drinking above recommended limits, but are still in control of their drinking." Researchers used data col...Marijuana ingredient inhibits VEGF pathway required for brain tumor blood vessels
...nnabinoids lowered the expression of several genes related to the VEGF pathway, critical for angiogenesis. The researchers also discovered that cannabinoids apparently worked by increasing the activity of ceramide, a lipid mediator of apoptosis, resulting in the functional inhibition of cells needed for VEG...Schizophrenia gene variant linked to risk traits
... may provide a counterbalancing advantage, perhaps related to reduced glutamate in the cells. Also participating in the research were: Drs. Richard Straub, Terry Goldberg, Joseph Callicott, Ahmad Hariri, Venkata Mattay, Thomas Hyde, Cynthia Shannon-Weickert, Mayada Akil, Radha Krishna Vakkalanka, Rishi Balk...New comprehensive textbook on companion animals fills need
...tters. With the rapidly growing number of pets and related job opportunities is a large demand for college-le... of animal welfare and animal rights, and problems related to people giving up once-wanted pets. Eleven veterinarians contributed to the book, based on their i...T. rex owes its giant size to the ultimate teenage growth spurt
...60 bones from 20 different fossils of four closely related Late Cretaceous North American tyrannosaurids. This includes T. rex (seven different fossils), Albertosaurus (five), Gorgosaurus (five) and Daspletosaurus (three). Three tyrannosaurid specimens used in the study came from Field Museum collections, in......t Indiana University. The elevated levels could be related to the Chinooks feeding behaviors, according to the researchers. Among all the wild species in the study, Chinook tend to feed higher in the food web and grow to be larger fish. While its difficult to make direct comparisons, the concentrations found...