Πέμπτη 19 Μαρτίου 2020


Construction and characterization of an adenoviral vector encoding human bone morphogenetic protein-2
Journal of International Medical Research, Volume 48, Issue 3, March 2020.
SAGE Publications Ltd: Journal of International Medical Research: Table of Contents
Thu Mar 19, 2020 05:59
Upregulated immuno-modulator PD-L1 in malignant peripheral nerve sheath tumors provides a potential biomarker and a therapeutic target
Abstract Background Malignant peripheral nerve sheath tumors (MPNSTs) are rare aggressive sarcomas with poor prognosis. More than half of MPNSTs develop from benign precursor tumors associated with neurofibromatosis type 1 (NF1) which is a tumor suppressor gene disorder. Early detection of malignant transformation in NF1 patients is pivotal to improving survival. The primary aim of this study was to evaluate the role of immuno-modulators...
Cancer Immunology, Immunotherapy
Thu Mar 19, 2020 02:00
A Modified Lean and Release Technique to Emphasize Response Inhibition and Action Selection in Reactive Balance
Here we offer a protocol that allows the user to selectively change affordances and/or constraints on movements that are relevant for recovering balance after postural perturbation.
JoVE: Journal of Visualized Experiments
Thu Mar 19, 2020 20:35
Preparation of SNS Cobalt(II) Pincer Model Complexes of Liver Alcohol Dehydrogenase
The preparation of SNS pincer cobalt(II) model complexes of liver alcohol dehydrogenase is presented here. The complexes can be prepared by reacting the ligand precursor with CoCl2·6H2O and can then be recrystallized by allowing diethyl ether to slowly diffuse into an acetonitrile solution that contains the cobalt complex.
JoVE: Journal of Visualized Experiments
Thu Mar 19, 2020 19:35
A sustainable wood biorefinery for low-carbon footprint chemicals production
The profitability and sustainability of future biorefineries are dependent on efficient feedstock use. Therefore, it is essential to valorize lignin when using wood. We have developed an integrated biorefinery that converts 78 weight % (wt %) of birch into xylochemicals. Reductive catalytic fractionation of the wood produces a carbohydrate pulp amenable to bioethanol production and a lignin oil. After extraction of the lignin oil, the crude, unseparated mixture of phenolic monomers is catalytically...
Science: Current Issue
Thu Mar 19, 2020 19:39
Avian statisticians
Science: Current Issue
Thu Mar 19, 2020 19:39
Better late than never
Science: Current Issue
Thu Mar 19, 2020 19:39
Genetic determination of cortex structure
Science: Current Issue
Thu Mar 19, 2020 19:39
News at a glance
Science: Current Issue
Thu Mar 19, 2020 19:39
Structural basis of Gs and Gi recognition by the human glucagon receptor
Class B G protein–coupled receptors, an important class of therapeutic targets, signal mainly through the Gs class of heterotrimeric G proteins, although they do display some promiscuity in G protein binding. Using cryo–electron microscopy, we determined the structures of the human glucagon receptor (GCGR) bound to glucagon and distinct classes of heterotrimeric G proteins, Gs or Gi1. These two structures adopt a similar open binding cavity to accommodate Gs and Gi1. The Gs binding selectivity of...
Science: Current Issue
Thu Mar 19, 2020 19:39
Countries test tactics in 'war against COVID-19
Science: Current Issue
Thu Mar 19, 2020 19:39
Time to pull together
Science: Current Issue
Thu Mar 19, 2020 19:39
Coronavirus disruptions reverberate through research
Science: Current Issue
Thu Mar 19, 2020 19:39
Macrophages cFLIP out
Science: Current Issue
Thu Mar 19, 2020 19:39
Oldest fossil of modern birds is a 'turducken
Science: Current Issue
Thu Mar 19, 2020 19:39
The psychology of the alt-right
Science: Current Issue
Thu Mar 19, 2020 19:39
After Brexit, U.K. budget offers boost to science
Science: Current Issue
Thu Mar 19, 2020 19:39
Golgi-derived PI(4)P-containing vesicles drive late steps of mitochondrial division
Mitochondrial plasticity is a key regulator of cell fate decisions. Mitochondrial division involves Dynamin-related protein-1 (Drp1) oligomerization, which constricts membranes at endoplasmic reticulum (ER) contact sites. The mechanisms driving the final steps of mitochondrial division are still unclear. Here, we found that microdomains of phosphatidylinositol 4-phosphate [PI(4)P] on trans-Golgi network (TGN) vesicles were recruited to mitochondria–ER contact sites and could drive mitochondrial division...
Science: Current Issue
Thu Mar 19, 2020 19:39
Unrest imperils India's census
Science: Current Issue
Thu Mar 19, 2020 19:39
Comment on "Amphibian fungal panzootic causes catastrophic and ongoing loss of biodiversity"
Scheele et al. (Reports, 29 March 2019, p. 1459) bring needed attention to the effects of amphibian infectious disease. However, the data and methods implicating the disease chytridiomycosis in 501 amphibian species declines are deficient. Which species are affected, and how many, remains a critical unanswered question. Amphibians are imperiled; protective actions require public support and robust science.
Science: Current Issue
Thu Mar 19, 2020 19:39
Top neuroscientist leaving Mexican university
Science: Current Issue
Thu Mar 19, 2020 19:39
Genomes from around the globe
Science: Current Issue
Thu Mar 19, 2020 19:39
Sick time
Science: Current Issue
Thu Mar 19, 2020 19:39
Responsible use of psychostimulants
Science: Current Issue
Thu Mar 19, 2020 19:39
Challenges of human nutrition research
Science: Current Issue
Thu Mar 19, 2020 19:39
Stressed into generating amyloid-{beta}
Science: Current Issue
Thu Mar 19, 2020 19:39
Is it worth the effort?
Science: Current Issue
Thu Mar 19, 2020 19:39
The red planet quakes
Science: Current Issue
Thu Mar 19, 2020 19:39
Thermal light tunnels its way into electricity
Science: Current Issue
Thu Mar 19, 2020 19:39
A decoy insulin receptor in worms?
Science: Current Issue
Thu Mar 19, 2020 19:39
Neuron-targeted electrical modulation
Science: Current Issue
Thu Mar 19, 2020 19:39
Latitudinal effect of vegetation on erosion rates identified along western South America
Vegetation influences erosion by stabilizing hillslopes and accelerating weathering, thereby providing a link between the biosphere and Earth’s surface. Previous studies investigating vegetation effects on erosion have proved challenging owing to poorly understood interactions between vegetation and other factors, such as precipitation and surface processes. We address these complexities along 3500 kilometers of the extreme climate and vegetation gradient of the Andean Western Cordillera (6°S to...
Science: Current Issue
Thu Mar 19, 2020 19:39
Shallow ponds prompt fitness-favorable species interbreeding
Science: Current Issue
Thu Mar 19, 2020 19:39
Female toads engaging in adaptive hybridization prefer high-quality heterospecifics as mates
Hybridization—interbreeding between species—is generally thought to occur randomly between members of two species. Contrary to expectation, female plains spadefoot toads (Spea bombifrons) can increase their evolutionary fitness by preferentially mating with high-quality males of another species, the Mexican spadefoot toad (Spea multiplicata). Aspects of Mexican spadefoot males’ mating calls predict their hybrid offspring’s fitness, and plains spadefoot females prefer Mexican spadefoot males on the...
Science: Current Issue
Thu Mar 19, 2020 19:39
Taking on all of the biomass for conversion
Science: Current Issue
Thu Mar 19, 2020 19:39
Technology Feature | Democratizing cryo-EM: Broadening access to an expanding field
Science: Current Issue
Thu Mar 19, 2020 19:39
Stanley Cohen (1922-2020)
Science: Current Issue
Thu Mar 19, 2020 19:39
Insights into human genetic variation and population history from 929 diverse genomes
Genome sequences from diverse human groups are needed to understand the structure of genetic variation in our species and the history of, and relationships between, different populations. We present 929 high-coverage genome sequences from 54 diverse human populations, 26 of which are physically phased using linked-read sequencing. Analyses of these genomes reveal an excess of previously undocumented common genetic variation private to southern Africa, central Africa, Oceania, and the Americas, but...
Science: Current Issue
Thu Mar 19, 2020 19:39
Time for NIH to lead on data sharing
Science: Current Issue
Thu Mar 19, 2020 19:39

Erosion-vegetation interactions
Science: Current Issue
Thu Mar 19, 2020 19:39
Sexism and the stars
Science: Current Issue
Thu Mar 19, 2020 19:39
Clarifying diet studies
Science: Current Issue
Thu Mar 19, 2020 19:39
Vanquishing false idols, then and now
Science: Current Issue
Thu Mar 19, 2020 19:39
Mapping perovskite trap states
Science: Current Issue
Thu Mar 19, 2020 19:39
Preventing COVID-19 prejudice in academia
Science: Current Issue
Thu Mar 19, 2020 19:39
Choosing mates wisely
Science: Current Issue
Thu Mar 19, 2020 19:39
Humpback dolphins at risk of extinction
Science: Current Issue
Thu Mar 19, 2020 19:39
Ciliopathy insights
Science: Current Issue
Thu Mar 19, 2020 19:39
A first step for the Yangtze
Science: Current Issue
Thu Mar 19, 2020 19:39
Sex differentiation in the human social brain
Science: Current Issue
Thu Mar 19, 2020 19:39
The frozen continent
Science: Current Issue
Thu Mar 19, 2020 19:39
Connecting the human amygdala
Science: Current Issue
Thu Mar 19, 2020 19:39
The lost colony
Science: Current Issue
Thu Mar 19, 2020 19:39
Cancer therapy in good order
Science: Current Issue
Thu Mar 19, 2020 19:39
History, mass loss, structure, and dynamic behavior of the Antarctic Ice Sheet
Antarctica contains most of Earth’s fresh water stored in two large ice sheets. The more stable East Antarctic Ice Sheet is larger and older, rests on higher topography, and hides entire mountain ranges and ancient lakes. The less stable West Antarctic Ice Sheet is smaller and younger and was formed on what was once a shallow sea. Recent observations made with several independent satellite measurements demonstrate that several regions of Antarctica are losing mass, flowing faster, and retreating...
Science: Current Issue
Thu Mar 19, 2020 19:39
Machine learning for natural extracts
Science: Current Issue
Thu Mar 19, 2020 19:39
The Southern Ocean and its interaction with the Antarctic Ice Sheet
The Southern Ocean exerts a major influence on the mass balance of the Antarctic Ice Sheet, either indirectly, by its influence on air temperatures and winds, or directly, mostly through its effects on ice shelves. How much melting the ocean causes depends on the temperature of the water, which in turn is controlled by the combination of the thermal structure of the surrounding ocean and local ocean circulation, which in turn is determined largely by winds and bathymetry. As climate warms and atmospheric...
Science: Current Issue
Thu Mar 19, 2020 19:39
Electrical power generation from moderate-temperature radiative thermal sources
Moderate-temperature thermal sources (100° to 400°C) that radiate waste heat are often the by-product of mechanical work, chemical or nuclear reactions, or information processing. We demonstrate conversion of thermal radiation into electrical power using a bipolar grating-coupled complementary metal-oxide-silicon (CMOS) tunnel diode. A two-step photon-assisted tunneling charge pumping mechanism results in separation of charge carriers in pn-junction wells leading to a large open-circuit voltage developed...
Science: Current Issue
Thu Mar 19, 2020 19:39
The uncertain future of the Antarctic Ice Sheet
The Antarctic Ice Sheet is losing mass at an accelerating pace, and ice loss will likely continue over the coming decades and centuries. Some regions of the ice sheet may reach a tipping point, potentially leading to rates of sea level rise at least an order of magnitude larger than those observed now, owing to strong positive feedbacks in the ice-climate system. How fast and how much Antarctica will contribute to sea level remains uncertain, but multimeter sea level rise is likely for a mean global...
Science: Current Issue
Thu Mar 19, 2020 19:39

Resolving spatial and energetic distributions of trap states in metal halide perovskite solar cells
We report the profiling of spatial and energetic distributions of trap states in metal halide perovskite single-crystalline and polycrystalline solar cells. The trap densities in single crystals varied by five orders of magnitude, with a lowest value of 2 x 1011 per cubic centimeter and most of the deep traps located at crystal surfaces. The charge trap densities of all depths of the interfaces of the polycrystalline films were one to two orders of magnitude greater than that of the film interior,...
Science: Current Issue
Thu Mar 19, 2020 19:39
From genetics to material to behavior
Science: Current Issue
Thu Mar 19, 2020 19:39
Dopamine promotes cognitive effort by biasing the benefits versus costs of cognitive work
Stimulants such as methylphenidate are increasingly used for cognitive enhancement but precise mechanisms are unknown. We found that methylphenidate boosts willingness to expend cognitive effort by altering the benefit-to-cost ratio of cognitive work. Willingness to expend effort was greater for participants with higher striatal dopamine synthesis capacity, whereas methylphenidate and sulpiride, a selective D2 receptor antagonist, increased cognitive motivation more for participants with lower synthesis...
Science: Current Issue
Thu Mar 19, 2020 19:39
Electricity from thermal sources
Science: Current Issue
Thu Mar 19, 2020 19:39
Genetically targeted chemical assembly of functional materials in living cells, tissues, and animals
The structural and functional complexity of multicellular biological systems, such as the brain, are beyond the reach of human design or assembly capabilities. Cells in living organisms may be recruited to construct synthetic materials or structures if treated as anatomically defined compartments for specific chemistry, harnessing biology for the assembly of complex functional structures. By integrating engineered-enzyme targeting and polymer chemistry, we genetically instructed specific living neurons...
Science: Current Issue
Thu Mar 19, 2020 19:39
PI(4)P regulates mitochondrial fission
Science: Current Issue
Thu Mar 19, 2020 19:39
cFLIPL protects macrophages from LPS-induced pyroptosis via inhibition of complex II formation
Cell death and inflammation are interdependent host responses to infection. During pyroptotic cell death, interleukin-1β (IL-1β) release occurs through caspase-1 and caspase-11–mediated gasdermin D pore formation. In vivo, responses to lipopolysaccharide (LPS) result in IL-1β secretion. In vitro, however, murine macrophages require a second "danger signal" for the inflammasome-driven maturation of IL-1β. Recent reports have shown caspase-8–mediated pyroptosis in LPS-activated macrophages but have...
Science: Current Issue
Thu Mar 19, 2020 19:39
Dodgeball for drones
Science: Current Issue
Thu Mar 19, 2020 19:39
New Products
Science: Current Issue
Thu Mar 19, 2020 19:39
Every twig and splinter used
Science: Current Issue
Thu Mar 19, 2020 19:39
How I faced my coronavirus anxiety
Science: Current Issue
Thu Mar 19, 2020 19:39
Antibody assembly in lampreys
Science: Current Issue
Thu Mar 19, 2020 19:39
Response to Comment on "Amphibian fungal panzootic causes catastrophic and ongoing loss of biodiversity"
Lambert et al. question our retrospective and holistic epidemiological assessment of the role of chytridiomycosis in amphibian declines. Their alternative assessment is narrow and provides an incomplete evaluation of evidence. Adopting this approach limits understanding of infectious disease impacts and hampers conservation efforts. We reaffirm that our study provides unambiguous evidence that chytridiomycosis has affected at least 501 amphibian species.
Science: Current Issue
Thu Mar 19, 2020 19:39
Choosing a partner that fits
Science: Current Issue
Thu Mar 19, 2020 19:39
The genetic architecture of the human cerebral cortex
The cerebral cortex underlies our complex cognitive capabilities, yet little is known about the specific genetic loci that influence human cortical structure. To identify genetic variants that affect cortical structure, we conducted a genome-wide association meta-analysis of brain magnetic resonance imaging data from 51,665 individuals. We analyzed the surface area and average thickness of the whole cortex and 34 regions with known functional specializations. We identified 199 significant loci and...
Science: Current Issue
Thu Mar 19, 2020 19:39

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