Stronger Evidence That Global Climate Change Can Reduce The Variety Of Life
...ty to change are still unclear butCronin and Raymo propose that changes in solar radiation initiate a chainreaction that reduces the productivity of surface ocean planktoncommunities. This in turn leads to less food resources settling through thewater to the sea floor, ultimately limiting the species that ca...Hurdle In Ulcer Vaccine Development Cleared
...ed the bacterium from binding to Leb. "We propose that the protein product of this gene, BabA, allows H.pylori to stick to the gastric epithelium and play a critical role in theefficient delivery of factors that directly damage gastric tissues," Borén says. Thomas Borén can be reached at: ......lement is not reached, the White House may have to propose alternate fundingsources for the increases, and may be forced to dip into the budget surplus, gobeyond the spending caps, or reallocate money intended to fund other programs. Another concern in the report is that the bulk of the increases in thePres...Biochemists Gain Crystal-Clear Insight into 'Ancient' Enzyme
...both theDuke and University of Pennsylvania groups propose to design inhibitor compoundsthat will block some aspect of the critical contacts among the protein,the RNA portion of the ribozyme, and the pre-tRNA. "There are a great many places one could target to thwart this enzyme,"Fierke said....Ecological Consequences Of Jasmonate-Induced Responses For Plants In Native Populations
...ots after leaf wounding and it is reasonable to propose that the treatments of roots with jasmonate will stimulate responses comparable to those elicited by leaf wounding. N. attenuata has life history characteristics that make it particularly useful for a test of the cost-benefit model...Scientists, Philosophers Discuss How To Evaluate Data, Error
...d techniques foruncovering and avoiding errors. "I propose reinterpreting standard statisticaltests as tools for obtaining experimental knowledge," she says. "I represent an orthodox approach with a lot of reinterpretation aimeddeliberately at avoiding common misuses and criticisms." But the value o......aphical datafor the primates, Stewart and Disotell propose instead that the lineage leadingto the common ancestor of all living apes dispersed out of Africa about 20million years ago (during the early Miocene) and then speciated into the greaterand lesser Ape lineages in Eurasia. Within the past 10 million y......from simplerprecursors. Although scientists could propose ways by which the four RNA bases(A, C, G, and U) and the ribose-phosphate sugars could have arisen spontaneouslyon the early earth, these prebiotic reactions do not seem to be sufficient forlinking the base to the sugar phosphate, the critical step t...Evidence For Earliest Maritime-Based Societies In The Americas Reported In Science Magazine
...e Peruvian highlands, Sandweiss and his colleagues propose that thissite may have been occupied by foragers from the highlands who spent part oftheir time collecting food on the coast before eventually settling there morepermanently. Quebrada Tacahuay, on the other hand, does not appear to containevidence of...Tracking A Killer's Progression
...e response to the pathogen. UK researchers propose that YopM uses complex interactions to reach andpass through the controlled gates of the nucleus. They believe YopM binds tothe exterior of acidic compartments, called endosomal vesicles, and moves as newvesicles arise. YopM may act to prevent ente...Duke Scientists Engineer 'Stealth Virus' To Deliver Genes
....As a result of their findings, the Dukescientists propose a "two-hit" hypothesis to explain why other adenovirusvectors usually failed. The first immune-system "hit" after an adenovirus infection comes when theanimal's immune system recognizes the virus as foreign and attacks it,Amalfitano said. The second......etween the ages of 9 and 12 years. The researchers propose two possible explanations for why age might impactsmoking-related DNA adduct levels. One possibility is that smoking at an earlyage, a time of rapid lung growth and development, induces long-lastingphysiologic changes that impair the removal of dama...How Can You Tell Whether Corn Is Fungus-Ridden?
...? Well that's exactly what researchers in Illinois propose doing to weedout kernels of corn that could end up poisoning your breakfast. Grain storesoften become infected with fungi that produce harmful toxins, and the foodindustry has to prevent such poisons ending up in cornflakes or animal feed. C...University Of Chicago To Host 'Evo-Devo' Symposium
..., willgive the keynote speech. "Together, we will propose an upper and lower limitfor the complexity of the organism that gave rise to all the different phyla,"says Jablonski. The keynote address at the Biological Sciences Learning Center will befollowed by a reception in the Ida Noyes Building. ...Vitamin D Deficiency May Increase Risk Of Hip Fracture In Older Women
...s than in either elective group. These researchers propose that vitamin D supplementation at the time of fracturemay speed up recovery and reduce risk of fracture in the future. CurrentDietary Reference Intake Guidelines contain a daily recommendation of 400 IU ofvitamin D for people aged 51 through 70 and ...Researchers Propose A Revolutionary New Theory About The Way Cells Communicate
... release the morphogens. But the UCSF researchers propose the oppositeexplanation. "We suspect that extracellular matrix proteins bind up these proteins to makesure they don't go anywhere," said Kornberg. The researchers came to their conclusion by examining the mode of transmissionof Dpp protein and Hedge......unds research on environment-related disease. They propose to performanalyses of the amniotic fluid of about 1,000 women, mostly from the Los Angelesarea but also from Hamilton, Ontario. "We want two different sites because there is evidence within the literature,both with my own previous studies as well as...Under the hood of a cellular transport machine
... The new work allows Kirchhausen and colleagues to propose that clathrinmolecules add to the growing cage lattice by hooking into spaces in the existingstructure, then rapidly rotating into a locked position. The process isreminiscent of images of alien space ships locking into the mother vessel (seevideo). ...Protein essential for making steroids turns out to be a "molten globule"
...demy of Sciences, Bose,Miller and their colleagues propose that this flexible, "molten globule"conformation lowers the energy required for a channel to open in themitochondrial membrane. In this form, StAR appears to function as an on/offswitch for cholesterol flowing from the cell into the mitochondria. If ......edicted T cell activation. The researchers propose that this molecular reorganization produce abiological machine that allows the T cell to decide whether the correct antigenis present. When the T cell first makes contact with the antigen-presentingcell, a complex series of events begins with specifi...