Antimalarial substances found in New Caledonian sponges
...are a family of alkaloids, composed of three large groups distinguished according to differences in their chemical skeleton. They all carry a lateral poly-N chain and a variable-length carbon chain (3) . Phloeodictines types B and C, which are minority compounds, carry an additional sulfurated poly-N chain...New framework for biodiversity conservation
...e of species, both public and private conservation groups from the Park Service to The Nature Conservancy face a constant dilemma of when, where, and how to invest limited funds to maximize conservation benefits. In attempts to have a scientific foundation for these decisions, policy makers have invested...Scientists describe the world's smallest, lightest fish
...f marine animals, even for relatively well-studied groups like fishes, and in fact many important species remain undiscovered. "Anytime a scientist identifies an 'extreme' in the world it's important," said Hastings. "Think about the whole envelope of life. Most of us systematists describe things that fill ......ape Up America," a new coalition of various health groups recently announced their collective opinion that "booming low-carb diets were unlikely to lead to long-term weight loss and may be dangerous for health." At the same time, high protein diets are attracting their share of critics, among them the Amer...Songbirds escaped from Australasia, conquered rest of world
...03 species, including crows and ravens). The two groups of true songbirds were thought to have separate origins. The Corvida originated in Australasia, but the Passerida were thought to have arisen separately, in Eurasia. The Passerida then supposedly spread from Eurasia to Africa, Australasia and the New...Researchers discuss revised Food Guide Pyramid and what it will mean for the food industry
...ning health involves selecting foods from all food groups to obtain the range of nutrients needed," said Dr....t for the purposes of education, food planning for groups and subpopulations, and to provide an infrastructure upon which to systematically base food choices,...Scientists issue statement on scientific peer review
...teria developed by scientists. In addition, the groups hope that scientists themselves may find the statement a useful reference when providing input to policy makers on peer review regimes. "Our statement both supports the concept of peer review and intends to inform policy makers about how it is best...Tips from the Journals of the American Society for Microbiology
...ology. The elderly population is one of the groups hardest hit during outbreaks of infectious disease...th LT-IS for a period of eighteen hours. Both age groups showed an enhanced antibody response to the vaccine after wearing the patch, while the older mice th...Leading scientists design new framework for biodiversity conservation
...e of species, both public and private conservation groups from the Park Service to The Nature Conservancy face a constant dilemma of when, where, and how to invest limited funds to maximize conservation benefits. In attempts to have a scientific foundation for these decisions, policy makers have invested ...Findings suggest need for new view of p53 cancer protein's interaction with DNA
...defective in their binding to DNA, and a number of groups are trying to develop drugs that might treat cancer by restoring the DNA-binding activity of these mutants," says Thanos D. Halazonetis, D.D.S., Ph.D., associate professor in the molecular and cellular oncogenesis program at Wistar and senior author ...Vioxx in high doses causes hypertension
...eaths, compared to patients not on the drug. Other groups have reported similar findings among high-dose Vioxx users: an increased risk of heart attack and congestive heart failure, a rise in blood pressure and a greater incidence of edema, or swelling, in the arms and legs, which can put extra strain on th...Chipmunks descended from ancestors that survived last ice age, scientists say
...lotypes were identified as from eastern clades, or groups descending from multiple eastern and southern populations, that included northern Michigan through Indiana and eastern and southern Illinois. The other 78 haplotypes, whose genetic sequences showed little divergence, were found primarily in chipmunk...Triple-vaccine strategy stimulates strong HIV-specific immune response in monkeys
... adenovirus. The vaccines were administered to two groups of four rhesus macaques each. One group received the human adenovirus vaccine first, followed by the two chimpanzee adenovirus vaccines. The other group received one of the chimpanzee adenovirus vaccines first, followed by the other chimpanzee adenov...Lack of immune system protein prevents lupus-like condition in mice
...than in normal animals. Instead of disabling whole groups of immune system cells, SAP's removal seems to disrupt communication between two different types of immune cells, T and B cells. Scientists have long known that T cells help B cells produce antibodies meticulously customized to destroy the last scatt...$1.6 million grant to Williams College
...nce programs, providing opportunities for minority groups traditionally under-represented in the sciences, and outreach to local schools." "The grant promotes hands-on, investigative science for many people in and beyond our local community," said Wendy Raymond, associate professor of biology, who will ser...University of Chicago scientists pinpoint cellular cause of SIDS
... the rhythm continued. He found that there are two groups of pacemaker neurons, one of which does not depend on sodium channels to operate, but on calcium channels. Only four out of 172 pacemaker cells were not affected by riluzole. "You have to have a perfect recording in order to get those cells," Ramirez...Structure solved at Scripps shows how one human protein reduces potency of chemotherapy
... one of a number of different carbon-chain "alkyl" groups onto the bases of DNA, which change the structure of those bases and often disrupt the transcription or replication of that DNA. This can retard a cell's growth and lead to its deaththe desirable outcome for cancer cells. The damage these agents cau...EC boosts European electron microscopy research
...dinate the efforts of individual European research groups in the EM field. The collaborative activities of the Network will foster innovation and the spreading of novel technology and methodology in the individual partner laboratories. A close cooperation of the 3D-EM Network with the European Microscopy So...National study shows dog and cat allergens are universally present in U.S. homes
...e higher among households belonging to demographic groups in which dog or cat ownership was more prevalent, ...ive randomly selected areas (generally counties or groups of counties) across the entire country. The 831 homes included all regions of the country (northeast...Study finds plant enzyme function changes with location in cell
...in enzyme function. They suspected that lipid head groups -- a sort of "scaffold" that links the fatty acids and takes different forms in the chloroplasts and endoplasmic reticulum -- might play a role. By adding the gene responsible for building the chloroplast lipid head group to yeast cells, the scientis...