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drogy-info.cz / Novinky odjinud / Science: Current Issue
Science: Current Issue
[Report] Synthetic Genetic Polymers Capable of Heredity and Evolution
Artificial polymers of nucleic acid–like subunits not found in nature can mimic the functions of DNA and RNA.Authors: Vitor B. Pinheiro, Alexander I. Taylor, Christopher Cozens, Mikhail Abramov, Marleen Renders, Su Zhang, John C. Chaput, Jesper Wengel, Sew-Yeu Peak-Chew, Stephen H. McLaughlin, Piet Herdewijn, Philipp Holliger
[Report] A Segmentation Clock with Two-Segment Periodicity in Insects
Oscillating gene expression, a key feature of vertebrate segmentation, is shown to occur during segmentation in beetles.Authors: Andres F. Sarrazin, Andrew D. Peel, Michalis Averof
[Report] Dynamic Causes of the Relation Between Area and Age of the Ocean Floor
Numerical simulations show that the presence of continents influences the area of old sea floor.Authors: N. Coltice, T. Rolf, P. J. Tackley, S. Labrosse
[Report] Dislocation Damping and Anisotropic Seismic Wave Attenuation in Earth's Upper Mantle
Stress built up from plate tectonic collisions dissipates at dislocations in mantle minerals.Authors: Robert J. M. Farla, Ian Jackson, John D. Fitz Gerald, Ulrich H. Faul, Mark E. Zimmerman
[Report] A Universal Method to Produce Low–Work Function Electrodes for Organic Electronics
Air-stable, physisorbed polymers containing aliphatic amine groups can improve the efficiency of organic electronic devices.Authors: Yinhua Zhou, Canek Fuentes-Hernandez, Jaewon Shim, Jens Meyer, Anthony J. Giordano, Hong Li, Paul Winget, Theodoros Papadopoulos, Hyeunseok Cheun, Jungbae Kim, Mathieu Fenoll, Amir Dindar, Wojciech Haske, Ehsan Najafabadi, Talha M. Khan, Hossein Sojoudi, Stephen Barlow, Samuel Graham, Jean-Luc Brédas, Seth R. Marder, Antoine Kahn, Bernard Kippelen
[Report] Enantioselective C-H Crotylation of Primary Alcohols via Hydrohydroxyalkylation of Butadiene
A catalyst facilitates complex carbon-carbon bond formation using a bulk commodity feedstock compound.Authors: Jason R. Zbieg, Eiji Yamaguchi, Emma L. McInturff, Michael J. Krische
[Report] Interplay of Intra- and Intermolecular H-Bonding in a Progressively Solvated Macrocyclic Peptide
The main conformational changes associated with the hydration of a peptide ring ensue upon the addition of just two water molecules.Authors: Natalia S. Nagornova, Thomas R. Rizzo, Oleg V. Boyarkin
[Research Article] Oxidation of the Guanine Nucleotide Pool Underlies Cell Death by Bactericidal Antibiotics
Several antibiotics kill bacteria by causing oxidative damage to guanine nucleotides, which then damage nucleic acids.Authors: James J. Foti, Babho Devadoss, Jonathan A. Winkler, James J. Collins, Graham C. Walker
[Review] The State and Fate of Himalayan Glaciers
Authors: T. Bolch, A. Kulkarni, A. Kääb, C. Huggel, F. Paul, J. G. Cogley, H. Frey, J. S. Kargel, K. Fujita, M. Scheel, S. Bajracharya, M. Stoffel
[Perspective] Biochemistry: Visualizing Amyloid Assembly
Specific precursor states formed from soluble native proteins have been identified as leading to oligomerization and amyloid formation.Author: David Eliezer
[Perspective] Evolution: Toward an Alternative Biology
The fundamental processes of genetics have been captured with synthetic molecules.Author: Gerald F. Joyce
[Perspective] Development: Making Waves for Segments
Vertebrates and arthropods share a common molecular mechanism for controlling body segmentation during development.Authors: Siegfried Roth, Kristen A. Panfilio
[Perspective] Psychology: Tapping into the Wisdom of the Crowd—with Confidence
The subjective confidence of individuals in groups can be a valid predictor of accuracy in decision-making tasks.Author: Ralph Hertwig
[Perspective] Cancer: Heterogeneity and Tumor History
What can genomic heterogeneity within a single tumor reveal about the tumor's evolution and its diagnosis?Author: Darryl Shibata
[Perspective] Applied Physics: Solution-Processible Electrodes
Polymer-coated surfaces may provide a low-cost route for processing and fabricating organic-based electronic devices.Author: Michael G. Helander
[Perspective] Ocean Science: A Dive to Challenger Deep
A recent manned dive to the bottom of the Mariana Trench heralds new scientific discoveries.Authors: Richard A. Lutz, Paul G. Falkowski
[Policy Forum] Science and Regulation: FDA's Approach to Regulation of Products of Nanotechnology
A broadly inclusive initial approach may become more nuanced in light of experience, scientific information, and public input.Author: Margaret A. Hamburg
[Books et al.] Books Received
A
listing of books received
at Science during the week ending 13 April 2012.
[Book Review] Environment: Inextricably Coupled
Presenting a detailed framework for working toward sustainability, Scholz stresses the coupling of humans and the environment at every systemic level.Author: Harald A. Mieg
[Book Review] Medicine: Perceived Inheritance
Focusing on single-gene disorders, Klitzman considers what we will do once substantial portions of personal genomes become widely available.Author: Michael A. Goldman
[Technical Response] Response to Comment on “Detection of Emerging Sunspot Regions in the Solar Interior”
Authors: Stathis Ilonidis, Junwei Zhao, Alexander Kosovichev
[Technical Comment] Comment on “Detection of Emerging Sunspot Regions in the Solar Interior”
Author: Douglas C. Braun
[Correction] Corrections and Clarifications
[Letter] India's Science: Excellence Unrecognized
Authors: Tasneem Abbasi, Shahid Abbas Abbasi
[Letter] India's Science: Elitism Prevails
Author: Suraj P. Bhat
[Letter] Environment-Friendly Reform in Myanmar
Authors: Edward L. Webb, Jacob Phelps, Daniel A. Friess, Madhu Rao, Alan D. Ziegler
[News Focus] American Chemical Society Spring Meeting: New Genetic Letters Augment DNA, and Soon Perhaps Life
At the ACS meeting, a pair of research groups reported that they now have synthetic nucleotides that can be incorporated into DNA and can be copied with near perfection by enzymes that copy natural DNA.Author: Robert F. Service
[News Focus] American Chemical Society Spring Meeting: Biofuels and City Air: A Marginal Effect
The first citywide air quality study of its kind, reported at the meeting, suggests that unless more than 26% of cars switch to biofuels, it will have negligible effect on air pollution.Author: Robert F. Service
[News Focus] American Chemical Society Spring Meeting: Nanoparticles Offer ‘Open Sesame’ Keys to New Drugs and Vaccines
Research presented at the ACS meeting suggests that packing RNA strands together to form nano-sized particles could help get them into target cells and that another nanoparticle may lead to novel kinds of vaccines.Author: Robert F. Service
[News Focus] Hydropower: Evidence Mounts for Dam-Quake Link
Newly published studies present the strongest evidence yet for a link between the 2008 Wenchuan earthquake and the reservoir behind the 156-meter-high Zipingpu Dam.Author: Jane Qiu
[News Focus] Hydropower: Trouble on the Yangtze
Upriver habitats—including a critical refuge created when construction began on the Three Gorges Dam—are now at risk from a series of new projects.Author: Jane Qiu
[News & Analysis] Newsmaker Interview: Robert Groves: Saving Money Essential for Next Census, Says Departing Director
Sociologist Robert Groves announced last week that he would be leaving the Census Bureau in August. Science interviewed him on 13 April.Author: Jeffrey Mervis
[News & Analysis] Biomedicine: Nanoparticle Treatment Reverses Cerebral Palsy in Rabbits
This week in Science Translational Medicine, researchers describe a treatment that restores nearly normal movement to rabbits with an induced form of cerebral palsy when given a few hours after birth.Author: Greg Miller
[News & Analysis] Biosecurity: Will Dutch Allow ‘Export’ of Controversial Flu Study?
The Dutch government must decide whether it will invoke export-control laws in a bid to prevent virologist Ron Fouchier from submitting a revised version of his controversial H5N1 paper to Science.Author: Martin Enserink
[News & Analysis] Stem Cells: Texas Medical Board Approves Rules for Controversial Treatment
Last week, the Texas Medical Board signed off on what's said to be the first state-level policy imposing oversight on experimental treatments using adult stem cells.Author: Jocelyn Kaiser
[News & Analysis] Agriculture: Dread Citrus Disease Turns Up in California, Texas
Researchers are hoping that rapid action can contain citrus greening, buying enough time to develop treatments or even resistant trees.Author: Erik Stokstad
[News of the Week] Newsmakers
This week's Newsmakers are Mohamed Ismail Khaled, the Egyptian official in charge of foreign archaeological missions, who spoke to a Yale University audience about the effects of the revolution, and astrophysicist Fang Lizhi, a champion of freedom, human rights, and democracy in China, who died at 76 on 6 April.
[News of the Week] Random Sample
For the second year in a row, Thomson Reuters named Eric Lander of the Broad Institute the year's most influential researcher. A group of undergraduates at Case Western Reserve University designed a non-Newtonian fluid to fill potholes. And this week's numbers quantify the new record for most retractions by a single author and the number of coral species in U.S. waters that likely face extinction by 2100.
[News of the Week] Around the World
In science news around the world this week, a tobacco research project nominated for China's 2012 National Science and Technology Progress Award has produced an uproar among China's scientific community, the head of one of Croatia's most important natural sciences institutes has lost her job, scientists began a massive accounting of seals in the Arctic, a new state-of-the-art U.S. laboratory for agricultural biodefense is in limbo, and publishers of more than 1000 Chinese journals have pledged to root out plagiarism and falsified research.
[Editorial] Standards for Postdoc Training
Author: Alan I. Leshner