Feed aggregator

Structure of norovirus HBGA blocking mAb complex [Biochemistry]

PNAS Early Edition Articles - Mon, 09/19/2016 - 13:06
Human noroviruses (HuNoVs) cause sporadic and epidemic gastroenteritis worldwide. They are classified into two major genogroups (GI and GII), with each genogroup further divided into multiple genotypes. Susceptibility to these viruses is influenced by genetically determined histo-blood group antigen (HBGA) expression. HBGAs function as cell attachment factors by binding to...

Hippocampus and language processing [Psychological and Cognitive Sciences]

PNAS Early Edition Articles - Mon, 09/19/2016 - 13:06
Language is classically thought to be supported by perisylvian cortical regions. Here we provide intracranial evidence linking the hippocampal complex to linguistic processing. We used direct recordings from the hippocampal structures to investigate whether theta oscillations, pivotal in memory function, track the amount of contextual linguistic information provided in sentences....

Cerebral nuclei connectome [Neuroscience]

PNAS Early Edition Articles - Mon, 09/19/2016 - 13:06
The cerebral nuclei form the ventral division of the cerebral hemisphere and are thought to play an important role in neural systems controlling somatic movement and motivation. Network analysis was used to define global architectural features of intrinsic cerebral nuclei circuitry in one hemisphere (association connections) and between hemispheres (commissural...

Macropinosome recycling via WASH [Cell Biology]

PNAS Early Edition Articles - Mon, 09/19/2016 - 13:06
Macropinocytosis is an ancient mechanism that allows cells to harvest nutrients from extracellular media, which also allows immune cells to sample antigens from their surroundings. During macropinosome formation, bulk plasma membrane is internalized with all its integral proteins. It is vital for cells to salvage these proteins before degradation, but...

We’re Saved! Massachusetts ‘to fight climate change with sweeping executive order’ – ‘Getting serious about meeting its climate goals’

Climate Depot - Mon, 09/19/2016 - 12:29
Gov. Charlie Baker (R) signed an executive order last week directing state agencies to take steps to ensure the state reaches its 2020 emissions reductions goals, study the state’s vulnerability, and plan proactively for climate mitigation. Baker called the order “an important step to protect public health and safety, local infrastructure, small businesses, and our [...]

We’re Saved! Canada’s environment minister promises a nationwide ‘price on carbon’

Climate Depot - Mon, 09/19/2016 - 12:27
Canadian Minister of Environment and Climate Change Catherine McKenna. CREDIT: AP PHOTO/SAIT SERKAN GURBUZ Canadian Minister of the Environment and Climate Change Catherine McKenna pledged Sunday to enact a nationwide carbon price on provinces that don’t do enough to curb greenhouse gas emissions on their own. McKenna did not give specific details on how the plan would [...]

2016 Arctic sea ice 25% more than low of 2012 – Polar temperatures start to plunge

Climate Depot - Mon, 09/19/2016 - 12:20
Arctic sea ice extent for 2016 is up nearly 25 percent over 2012 levels as polar temperatures continue to drop. The information comes from satellite imagery provided by the Danish Meteorological Institute (DMI) and the National Snow and Ice Data Center (NSIDC), which has been tracking Arctic ice extent since satellitemeasurements began in 1979. Mid-September [...]

Climate skeptic basher John Cook (promoter of 97% claim) joins George Mason U. – Morano’s alma mater!

Climate Depot - Mon, 09/19/2016 - 12:07
Via GMU press release: We are delighted to announce that John Cook, PhD will be joining our team as a Research Assistant Professor, beginning January 2017. Initially trained as a physicist, John recently completed his PhD in psychology at the University of Western Australia.  His doctoral research focused on the negative influences of misinformation on [...]

UK new nuclear developers pay tribute to EDF

World Nuclear News - Mon, 09/19/2016 - 12:05
The UK government's approval of EDF Energy's Hinkley Point C project has "blazed the trail" for other nuclear new build developers at home and abroad, delegates at the World Nuclear Association's Annual Symposium heard last week.

We’re Saved! France bans plastic forks and spoons to fight climate change! 

Climate Depot - Mon, 09/19/2016 - 07:11
http://travel.aol.co.uk/2016/09/18/france-bans-plastic-cutlery-fight-climate-change/ Plastic cutlery and crockery is set to be banned in France unless it is made from biologically sourced materials.The move is part of the French environmental initiative called Energy Transition for Green Growth, and the law will come into force in 2020. …  The Telegraph reports that the move is part of a growing trend to [...]

Tectonics: Changing of the plates

Nature Geoscience Advanced Online - Sun, 09/18/2016 - 23:00

Nature Geoscience. doi:10.1038/ngeo2800

Author: Alan Brandon

The composition of Earth's crust depends on the style of plate tectonics and of the melting regimes in the mantle. Analyses of the oldest identified rocks suggest that these styles and the resulting crust have changed over Earth's history.

No evidence for Hadean continental crust within Earth’s oldest evolved rock unit

Nature Geoscience Advanced Online - Sun, 09/18/2016 - 23:00

Nature Geoscience. doi:10.1038/ngeo2786

Authors: J. R. Reimink, J. H. F. L. Davies, T. Chacko, R. A. Stern, L. M. Heaman, C. Sarkar, U. Schaltegger, R. A. Creaser & D. G. Pearson

Due to the acute scarcity of very ancient rocks, the composition of Earth’s embryonic crust during the Hadean eon (>4.0 billion years ago) is a critical unknown in our search to understand how the earliest continents evolved. Whether the Hadean Earth was dominated by mafic-composition crust, similar to today’s oceanic crust, or included significant amounts of continental crust remains an unsolved question that carries major implications for the earliest atmosphere, the origin of life, and the geochemical evolution of the crust–mantle system. Here we present new U–Pb and Hf isotope data on zircons from the only precisely dated Hadean rock unit on Earth—a 4,019.6 ± 1.8 Myr tonalitic gneiss unit in the Acasta Gneiss Complex, Canada. Combined zircon and whole-rock geochemical data from this ancient unit shows no indication of derivation from, or interaction with, older Hadean continental crust. Instead, the data provide the first direct evidence that the oldest known evolved crust on Earth was generated from an older ultramafic or mafic reservoir that probably surfaced the early Earth.

Large-scale subduction of continental crust implied by India–Asia mass-balance calculation

Nature Geoscience Advanced Online - Sun, 09/18/2016 - 23:00

Nature Geoscience. doi:10.1038/ngeo2806

Authors: Miquela Ingalls, David B. Rowley, Brian Currie & Albert S. Colman

UN Human Rights Office Asks If Economic Freedom Is An ‘Urgent Threat’ To Mankind?

Climate Depot - Fri, 09/16/2016 - 10:46
UN Human Rights Office Asks If Economic Freedom Is An “Urgent Threat” To Mankind? http://lidblog.com/un-human-rights-office-asks-if-economic-freedom-is-an-urgent-threat-to-mankind/ Guest post by Onan Coca Something absolutely NUTS transpired earlier this month when an ignorant leftist tool at the United Nations Human Rights Office got a hold of their Twitter account. Here’s what the UNHR office tweeted back on September 2nd: Hillel [...]

Anticipating collapse; Hints from the Stone Age [Commentaries]

PNAS Early Edition Articles - Fri, 09/16/2016 - 10:42
Few aspects of human history are as mindboggling as the sudden disintegration of advanced societies. It is tempting to seek common patterns or even draw some lessons for modern times from the many ancient cases of societal disintegration. In PNAS, Downey et al. (1) report that universal warning signals of...

Nitrate predicts ocean carbon accumulation [Commentaries]

PNAS Early Edition Articles - Fri, 09/16/2016 - 10:42
Biology and the environment interact, one shaping the other (1). In the oceans, the chemistry of seawater and the chemistry of life are intimately linked (2). In 1958, Alfred Redfield (3) noted that the microscopic plankton of the surface ocean contain carbon, nitrogen, and phosphorous atoms in a stoichiometry of...

Visualizing the emergence of autocatalytic systems [Chemistry]

PNAS Early Edition Articles - Fri, 09/16/2016 - 10:42
Autocatalytic chemical reactions are widely studied as models of biological processes and to better understand the origins of life on Earth. Minimal self-reproducing amphiphiles have been developed in this context and as an approach to de novo “bottom–up” synthetic protocells. How chemicals come together to produce living systems, however, remains...

Maritime adaptation in the western Pacific by 35 ka [Anthropology]

PNAS Early Edition Articles - Fri, 09/16/2016 - 09:40
Maritime adaptation was one of the essential factors that enabled modern humans to disperse all over the world. However, geographic distribution of early maritime technology during the Late Pleistocene remains unclear. At this time, the Indonesian Archipelago and eastern New Guinea stand as the sole, well-recognized area for secure Pleistocene...

Neurobiology of number in congenital blindness [Psychological and Cognitive Sciences]

PNAS Early Edition Articles - Fri, 09/16/2016 - 09:40
In humans, the ability to reason about mathematical quantities depends on a frontoparietal network that includes the intraparietal sulcus (IPS). How do nature and nurture give rise to the neurobiology of numerical cognition? We asked how visual experience shapes the neural basis of numerical thinking by studying numerical cognition in...

LCPUFA support aerial insectivore performance [Ecology]

PNAS Early Edition Articles - Fri, 09/16/2016 - 09:40
Once-abundant aerial insectivores, such as the Tree Swallow (Tachycineta bicolor), have declined steadily in the past several decades, making it imperative to understand all aspects of their ecology. Aerial insectivores forage on a mixture of aquatic and terrestrial insects that differ in fatty acid composition, specifically long-chain omega-3 polyunsaturated fatty...
Syndicate content