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Abstracts: Tyrosine kinase activation through the extracellular domains of cytokine receptors. CD45 is a JAK phosphatase and negatively regulates cytokine receptor signalling
Abstracts: Tyrosine kinase-dependent selection of transmitter responses induced by neuronal contact. Structure of an SH2 domain of the p85-alpha subunit of phosphatidylinositol-3-OH kinase
Abstracts: Tyrosine kinase receptor RET is a key regulator of Peyer's Patch organogenesis. Kissing chromosomes
Abstracts: Tyrosine kinases in activation of the MAP kinase cascade by G-protein-coupled receptors. Direct stimulation of Bruton's tyrosine kinase by Gq-protein alpha-subunit
Abstracts: Tyrosine phosphatase CD45 is essential for coupling T-cell antigen receptor to the phosphatidyl inositol pathway
Abstracts: Ubiquitous somatic mutations in simple repeated sequences reveal a new mechanism for colonic carcinogenesis. Engagement with transcription
Abstracts: U.K. astronomers hit out at funding council. Industrial world is unlikely to meet promised carbon cuts. Chemical weapons ban edges to realization
Abstracts: UK chemists seek a greater role in policing arms ban. Italy backs Third World science body... Forecasters seek better data on work patterns of scientists
Abstracts: UK climate meeting deems risks 'serious'. Remobilization of southern African desert dune systems by twenty-first century global warming
Abstracts: UK fraud verdict prompts moves on ethics.... An act of communal imagination. A Wellcome addition
Abstracts: UK gets the green light on modified crops. Off-track careers. British scientists seek recognition of role in 'life on Mars' debate...
Abstracts: UK goes for 'generic priorities' in bid to boost science/industry links. Faraday Centres appear doomed by Lords' panel
Abstracts: UK government backs change in law over stem-cell research ... but Germany remains unmoved. Europe lifts patent embargo on transgenic plants and animals...
Abstracts: UK national laboratories face new threat of privatization. UK watchdog boosts science credentials. Bleak prospects for physics research council
Abstracts: UK panel warns of crisis in clinical research careers. Brussels seeks tighter control over European funds for Russian science
Abstracts: UK parties differ on means, not ends. New government, old problems. Not on the agenda
Abstracts: UK policy learns about risk the hard way. Science in Portugal joins the mainstream. Yeltsin's two steps to Eureka club membership
Abstracts: Ukraine scientists grow impatient for change. Hungary's science academy slammed as 'obsolete'. Climate study highlights inadequacy of emissions cuts
Abstracts: Ukrainian scientists charged over transfer of data to West. Russia protests at US science sanctions. Privatization of UK weapons labs under fire
Abstracts: UK research councils claim success for open-access publishing plan. UK experts map out route to licensing transgenic crops
Abstracts: UK's food standards agency will report to health minister. Europe bids to pull US patent law into line with first-to-file system
Abstracts: UK's physical scientists are left disappointed by budget choices. Gunfire echoes in debates on public understanding
Abstracts: UK to set up advisory panel on genetic data. UK takes pride in 'principled pragmatism.' (bioethics in United Kingdom)
Abstracts: UK universities get another funding boost. Labour keeps its supporters guessing. Driving UK health research by responding to users' needs
Abstracts: Ultrafast colour displays. Photoelectrochemical cells. How many-particle interactions develop after ultrafast excitation of an electron-hole plasma
Abstracts: Ultrafast terahertz probes of transient conducting and insulating phases in an electron-hole gas. Logarithmic rate dependence of force networks in sheared granular materials
Abstracts: Ultra-high-Q toroid microcavity on a chip. 'Trapped rainbow' storage of light in metamaterials. Light interference from single atoms and their mirror images
Abstracts: Ultrahigh-quality silicon carbide single crystals. Enough, already. Sulphide mining by the superextensible foot of symbiotic thyasirid bivalves
Abstracts: Ultrahigh-quality silicon carbide single crystals. Lead- free piezoceramics. Lost lithium found
Abstracts: Ultrasensitive solution-cast quantum dot photodetectors. How clean is too clean? Phase-locking in double-point-contact spin-transfer devices
Abstracts: Ultrasonic communication and sexual selection in wax moths: female choice based on energy and asynchrony of male signals
Abstracts: Ultrasonic prediction of carcass merit in beef cattle: evaluation of technician effects on ultrasonic estimates of carcass fat thickness and longissimus mucsle area
Abstracts: Ultrasonic vocalizations and social learning of food preferences by female Norway rats. Female Japanese quail that eavesdrop on fighting males prefer losers to winners
Abstracts: Ultrasound studies of the effects of certain poisonous plants on uterine function and fetal development in livestock
Abstracts: Ultraviolet colour variation influences blue tit sex ratios. Why do birds engage in extra-pair copulation?
Abstracts: Ultraviolet light and leaf emission of NOx. The human footprint in the carbon cycle of temperate and boreal forests
Abstracts: Ultraviolet vision and band-colour preferences in female zebra finches, Taeniopygia guttata. Behavioural and physiological effects of absence of ultraviolet wavelengths for domestic chicks
Abstracts: Unaltered cosmic spherules in a 1.4-Gyr-old sandstone from Finland. Earth rocked by combination punch
Abstracts: Unapproved tests on a chip. A risky business. A developmental model for thalidomide defects
Abstracts: Unbinding force of a single motor molecule of muscle measured using optical tweezers. Right-handed rotation of an actin filament in an in vitro motile system
Abstracts: Uncertain aims delay start of Internet research effort. Speciation by host switch in brood parasitic indigobirds
Abstracts: ** Uncertain CERN cash means UK physicists face grant freeze. Review urges US physicists to think globally
Abstracts: Uncertainty and naivety in Germany's science politics: The SPD and Green coalition that governs Germany has made notable progress and demonstrated flexibility in the process. But the Greens' lack of expertise needs redressing if good science is to get the support it deserves
Abstracts: Uncertainty and the management of mallard harvests. Evaluation of waterfowl conservation under the North American Waterfowl Management Plan
Abstracts: Uncertainty in the reconstruction of ancestral character states and limitations on the use of phylogenetic comparative methods
Abstracts: Uncertainty over fate of Mir experiments. Earth holds comet smash in its sights. Columbia inquiry homes in on faulty foam
Abstracts: UN climate change report turns up the heat. Climate panel confirms human role in warming, fights off oil states
Abstracts: Uncomfortable truths. Turkish government accused of hijacking boosted science budget. Not just academic
Abstracts: Unconscious networking. Coding of intention in the posterior parietal cortex. Intrinsic functional architecture in the anaesthetized monkey brain
Abstracts: Unconventional critical behavior in a quasi-two-dimensional organic conductor. Clarifying the glass-transition behavior of water by comparison with hyperquenched inorganic glasses
Abstracts: Uncool Callisto. Mesoscale vertical motion and the size structure of phytoplankton in the ocean. The stability against freezing of an internal liquid-water ocean in Callisto
Abstracts: Uncoupling of S phase and mitosis induced by anticancer agents in cells lacking p21. CpG methylation is maintained in human cancer cells lacking DNMT1
Abstracts: Uncoupling of the molecular 'fence' and paracellular 'gate' functions in epithelial tight junctions. Smells, brains and hormones
Abstracts: Under cover on trial. The killing cure: killing healthy animals is a treatment that does not cure. Kill them all
Abstracts: Undermethylation associated with retroelement activation and chromosome remodelling in an interspecific mammalian hybrid
Abstracts: Under new management. Canada abolishes its national science adviser. UK astronomers stunned by Gemini withdrawal
Abstracts: Underplating over hotspots. The ends of the earth. Critically pressured free-gas reservoirs below gas-hydrate provinces
Abstracts: Understanding ocean dynamics. Simulating the amplification of orbital forcing by ocean feedbacks in the last glaciation
Abstracts: Understanding the acid behavior of zeolites from theory and experiment. How green was my ester
Abstracts: Understanding the causes of missed global positioning system telemetry fixes. Detecting and measuring food and water intake in captive seals using temperature telemetry
Abstracts: Understanding the role of sink patches in source-sink metapopulations: Reed Warbler in an agricultural landscape
Abstracts: Understanding the valency of rare earths from first-principles theory. Magnetic trapping of rare-earth atoms at millikelvin temperatures
Abstracts: Under the skin of Nazca. An artificial landscape-scale fishery in the Bolivian Amazon. Ancient food for thought
Abstracts: Unequal competition between three-spined stickleback, Gasterosteus aculeatus, L., encountering sequential prey
Abstracts: Unequal subfamily proportions among honey bee queen and worker brood. Risk-indifferent foraging behaviour in honeybees
Abstracts: Unexpectedly high concentrations of molecular chlorine in coastal air. Ancestral chloroplast genome in Mesostigma viride reveals an early branch of green plant evolution
Abstracts: Unexpectedly recent dates for human remains from Vogelherd. Palaeolithic ivory sculptures from southwestern Germany and the origins of figurative art
Abstracts: Unexpected stellar velocity distribution in the warped Galactic disk. Near-infrared jets in the Galactic microquasar GRS1915+105
Abstracts: Unidirectional rotation in a mechanically interlocked molecular rotor. Influencing intramolecular motion with an alternating electric field
Abstracts: Uniform discrimination of pattern orientation by honeybees. Worker nutrition and division of labor in honeybees
Abstracts: Uniform quantum-dot arrays formed by natural self-faceting on patterned substrates. Surprising movements in solids
Abstracts: Unique morphology of the human eye. Contrast dependence of contextual effects in primate visual cortex. Objective analysis of the topological organization of the primate cortical visual system
Abstracts: Unique, or not unique? A laboratory demonstration of the capability to image an Earth-like extrasolar planet. Is our Universe natural?
Abstracts: United through repulsion. Swift progress. A question of timing
Abstracts: United we sense.... Robustness in bacterial chemotaxis. Robustness in simple biochemical networks
Abstracts: Universal nucleic acid-binding domain revealed by crystal structure of the B. subtilis major cold-shock protein
Abstracts: Universal quantum computation with the exchange interaction. Protecting the quantum world
Abstracts: Universities fear repercussions as NIH tunes conflicts policy. From bench to bedside
Abstracts: Universities in clash over internet 'libel' allegations. Canadian whistleblower row prompts broader code of conduct
Abstracts: Universities protest against Australian spending cuts. Cuts spark strike at Australian universities. Clean-up strategy at Australian nuclear site called into question
Abstracts: Universities unnerved by revised rules for sharing NIH research. No easy answers
Abstracts: Universities urged to do more for poor nations. Heightened security after flu scare sparks biosafety debate. Aid agencies predict victory for HIV unless cash crisis is solved
Abstracts: University challenge. Organic farming enters the mainstream. Organic: is it the future of farming?
Abstracts: University debate boils over in Australia. Australia builds on biological successes with a broad new centre. Australia urged to revise Antarctic efforts
Abstracts: University equipment fund meets with mixed reaction. Britain finds way round impact of falling pound. Survey finds that restructuring has improved UK university research
Abstracts: University of California forms company to develop technology from its laboratories. US laboratories escape a radical overhaul
Abstracts: Unleaded high-performance. Lithium isotope evidence for subduction-enriched mantle in the source of mid-ocean-ridge basalts
Abstracts: Unlocking the drains. Do we even need eggs? Angionesis in life, disease and medicine
Abstracts: Unmasking the killer's accomplice. Key enzyme in leptin-induced anorexia. TREM-1 amplifies inflammation and is a crucial mediator of septic shock
Abstracts: Unmixing Hawaiian cocktails. Core formation on Mars and differentiated asteroids. Hafnium-tungsten chronometry and the timing terrestrial core formation
Abstracts: Unnatural selection. Biological chemistry: a glass bead game. Developmental biology: asymmetric fixation
Abstracts: Unorthodox alliances and the Louisiana black bear. Application of landscape-level conservation biology principles to the Lower Mississippi River Valley
Abstracts: Unprecedented low levels of genetic variation and inbreeding depression in an island population of the black-footed rock-wallaby
Abstracts: Unproductive splicing of SR genes associated with highly conserved and ultraconserved DNA elements. Repression of the human dihydrofolate reductase gene by a non-coding interfering transcript
Abstracts: Unravelling the chemical basis of competitive scent marking in house mice. Housing and welfare in laboratory rats: time-budgeting and pathophysiology in single-sex groups
Abstracts: Unravelling the dynamics of RNA degradation by ribonuclease II and its RNA-bound complex. Small RNAs with big impacts
Abstracts: Unravelling the Indian rope-trick. The megalab truth test. Unravelling gene interactions
Abstracts: Unrealistic desiccation of marine stratocumulus clouds by enhanced solar absorption. African dust in Florida clouds
Abstracts: Unreasonable hope for Rio fades. There's safety in numbers. Hiding from the midday Sun
Abstracts: Unsolved problems of noise. Crackling noise. Detection of doubled shot noise in short normal-metal/superconductor junctions
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