Researchers discover how worms' noses sense oxygen
...g that worm experts refer to as social behavior is really the worms, in an artificial setting like a Petri dish, trying to get to an area of 6 percent oxygen, which they like. It's a laboratory phenomenon." Bordering and clumping is a peculiar behavior in which worms cluster around the border of the Petri d...'Weed from hell' found in Texas
...by the next growing season. "The control can look really good right now, but in the next year, if the roots haven't died, the plant can come back," Ketchersid said. The perennial weed produces small fruit about inch in diameter, dark green with light green stripes. Resembling small striped watermelons, th...Macrophages, not stem cells, correct liver disease by fusion
...e said. "Our thought was that blood stem cells are really there to repair all tissues, and we showed that you can cure liver disease with blood stem cell transplantation. "Then we found out that the bone marrow cells were not turning into liver cells directly, but that they were fusing with preexisting live......al complexity has made it difficult to figure what really matters in the rough and tumble of nature. Genetic transformation of plants provides a valuable tool to manipulate traits that mediate these complex interactions and allows an integrative analysis of single traits. However, the evaluation of transfo...Make a splash for public health this summer
...ections resulted in immediate pool closures. "It's really a case of basic public health practices relaxing to the point of becoming a problem. We've observed that over the past two decades the number of reported outbreaks of diarrheal illness associated with swimming increased ten-fold," reports Beach. "Thi...Microscopy scans show how brain cells process energy
...in cells process energy -- while explaining what's really happening in PET (positron emission tomography) imaging and offering a better way to observe the damage that strokes and neurodegenerative diseases, such as Alzheimer's, wreak on brain cells. Multi-photon microscopy scans by Cornell University biophy...Releasing pet fish into the wrong ocean proves a diaster
...est of intentions, but in the wrong ocean. It is a really bad idea." The aquarium trade has long been suspected of introducing alien species, but the link has never been proved. So a team led by Semmens compared figures from imports of tropical marine fish into the US with sightings of exotic fish in the w...Deserts and rainforests are equally productive during drought
...een in deserts." Therefore, in a forest, during a really dry year there is the same growth production per unit of precipitation as there is in a really dry year in a desert. This data indicates that production sensitivity depends on the extent to whic...Hopkins to found first center for comprehensive study of epigenetics
...opkins to shift toward interdisciplinary research, really pulling together those working on related problems...ear that we needed to 'genomicize' epigenetics, to really investigate the issue more broadly than simply its role in cancer," says Feinberg. "This center is a...Finding the hole in the defenses of cavity-creating microbes
...ortable for a long-term stay in your mouth. It can really get disgusting in there," says Quivey." With S. mutans comfortably lodged along our tooth surfaces, the pH in our mouths quickly plummets, becoming 100 to 1,000 times more acidic than normal. Without frequent brushing and flossing, the assault on ou...Scientists discover genetic marker responsible for two-fold increase in risk of rheumatoid arthritis
...ics . "This is an important discovery, really a major genetic variant identified in a U.S. study that clearly seems to be involved in rheumatoid arthritis," said Stephen I. Katz, MD, PhD, director of the National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS), the lead agen...$5 million grant funds partnership, studies of minority-based issues in reproductive health
...and co-principal investigator for the study. "This really is a situation in which both institutions and pati...cal Center's being primarily Caucasian. "This is really an opportunity for our two institutions to really bridge a gap and address some of the health dispar...Brain development and puberty may be key factors in learning disorders
... "Back then I thought that the hearing problem was really contributing to their learning disability, as though some unique, particular, detailed characteristic were responsible. Today I'm thinking more broadly, trying to keep in mind the wide array of characteristics that have been observed to be abnormal i...Antioxidants during pregnancy may help prevent birth defects tied to alcohol
...us. "And the stages we're looking at are really very early, before women would even recognize pregnancy. The bottom line: If there's a chance you could become pregnant, don't drink, or if you're drinking don't get pregnant." The research was supported by grants from the National Institute...New multidisciplinary research tops chemists' meeting Aug. 22-26
...s related to organic food, including whether it is really more nutritious and whether organic farming is better for the environment. The ACS Division of Agrochemicals is hosting the symposium. In a three-day symposium, "Chemistry at Ultra-Low Temperatures," from Tuesday Thursday, Aug. 24-26, scientists wil...Molecule that 'blocks' key bacterial enzyme may lead to new antibiotics
...st year," added Severinov. "Interest in MccJ25 has really exploded." Shaped like a lasso with its tail pulled back through the loop, MccJ25 is one of very few molecules known to have this highly stable and rigid configuration a characteristic that may lead to applications beyond drug design. ......s--is part of the climate-change story that hasn't really been told. That is why it's important to make the science underlying climate change accessible to policymakers in parts of the world, like the United States, where much of the source of the problem lies." These and other perspectives on global warmin...Study probes ecosystem of tree holes
...ly, predators, resources, and disturbances all had really strong effects, but the interesting finding was ho...an't be asked on a large scale. "You can't really ask these types of questions using long-lived organisms like wolf and deerpopulations," he said. "I...Volcanic soils yield new clues about the emergence of powerful chiefdoms in Hawaii
...de of aggressive action. It's interesting that the really aggressive chiefdoms came from the highly intensified dryland systems on Maui and Hawai'i, where per capita yields were declining. They probably looked up the chain of islands toward Moloka'i and O'ahu and said, 'I'd love to get hold of those taro pa......p a single-molecule assay, to see whether we could really understand the mechanism of this protein's effects... pattern. We had never seen anything like that. We really thought that we were only seeing noise in the stretching of the DNA, but instead we were seeing a pe...