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Key: Meeting M      Journal J      Funder F

Showing releases 276-300 out of 521 releases.
Click to go to page: [ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 ]

Public Release: 3-Nov-2015
Nano Research
Strain-induced spatially indirect exciton recombination in zinc-blende/wurtzite CdS heterostructures

We observed the spatially indirect exciton recombination in CdS heterostructures consisting of different crystalline phases in the same CdS nanobelt, which is manifested by an extra emission peak at the low-energy side. The spatially indirect exciton emission peak obeys Varshi equation with temperature and exhibits band filling effect under high excitation power. Our findings would shed light on the improvement of laser cooling efficiency by strain engineering.

Contact: Wenbo Tian
tianwb@tup.tsinghua.edu.cn
Tsinghua University Press

Public Release: 3-Nov-2015
Nano Research
A bio-inspired Co3O4-polypyrrole-graphene complex as an efficient oxygen reduction catalyst in one-step ball milling

Co3O4-PPy/GN complexes as oxygen reduction reaction (ORR) electrocatalysts were fabricated by one-step in-situ ball milling of graphite, pyrrole and cobalt salt without resorting to high-temperature annealing. Co3O4-PPy/GN showed efficient ORR performances, good durability, methanol tolerance and anti-CO-poisoning effects, which could be promising alternatives to costly Pt-based electrocatalysts. The study may provide an eco-friendly, low-cost and facile approach to large-scale production of composite electrocatalysts with high ORR catalytic activity and long-term stability.

Contact: Wenbo Tian
tianwb@tup.tsinghua.edu.cn
Tsinghua University Press

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Also of interest from the Proceedings of the National Academy of Sciences

Researchers report that migrating songbirds’ decisions to travel across the Gulf of Mexico from coastal Alabama, as opposed to traveling over land or delaying departure, were associated with high fat reserves and low atmospheric humidity, and among the birds that initiated flights across the Gulf, successful arrival in the Yucatan Peninsula 1,000 miles away was associated with high fat reserves, late departure date, and tailwinds.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Birth of babies through round spermatid injection

A study reports the successful delivery of 14 children born to men otherwise considered sterile using a technique called round spermatid injection.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Quantum entanglement over large distances

Researchers report the detection of quantum entanglement over large distances. In quantum mechanics, two particles can be in an entangled state, such that any change in the state of one of the particles affects the state of the other, regardless of the distance between them.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
North American birds and West Nile virus

Researchers report the effects of West Nile virus on the survival rates of various North American bird species.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Mortality among white middle-aged Americans

A study finds an increase in mortality rates among non-Hispanic white middle-aged Americans after 1998 in contrast to consistent mortality declines observed in other demographic groups and previous historical experience.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Ice age extinction of Arctic megafauna

Rapid changes in climate during the ice age may have led to boom-and-bust cycles for several Arctic mammals such as mammoth and bison, a study reports.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Origins of agriculture

The first people to adopt farming were most likely part of small population groups that had farming-friendly property rights, a study finds.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Improving recovery from brain injury

A therapeutic approach that reduces local inflammation and minimizes the risk of infection could improve outcomes after traumatic brain injury (TBI), a study in rodents suggests.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
West Antarctic Ice Sheet collapse and sea level rise

A computer model suggests that the West Antarctic Ice Sheet (WAIS) may have begun an irreversible, centuries-long period of collapse that is predicted to raise sea levels by up to 3 meters.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Building endurance through high-intensity exercise

High-intensity exercise may disrupt a muscle calcium channel and lead to increased expression of endurance genes, according to a study.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
Proceedings of the National Academy of Sciences
Testosterone, pregnancy, and anxiety

Exposing female rats to testosterone during pregnancy increases anxiety-like behavior in their offspring, possibly due to changes in the brain’s amygdala, a study finds.

Contact: Luwam Yeibio
PNASnews@nas.edu
202-334-1310
Proceedings of the National Academy of Sciences

Public Release: 3-Nov-2015
JAMA
Pertussis infection in children associated with small increased risk of epilepsy

Although the absolute risk was low, researchers found an increased risk of childhood-onset epilepsy among children in Denmark who had a hospital-diagnosed pertussis infection, compared with the general population, according to a study in the Nov. 3 issue of JAMA.

Contact: Morten Olsen
mo@clin.au.dk
The JAMA Network Journals

Public Release: 3-Nov-2015
JAMA
Increase seen in prescription drug use in US

Between 1999-2012, overall prescription drug use increased among US adults, with this increase seen for the majority of but not all drug classes, according to a study in the Nov. 3 issue of JAMA.

Contact: Nicole McNamara
mcnamarn@mskcc.org
646-227-3633
The JAMA Network Journals

Public Release: 2-Nov-2015
Nano Research
NiRh nanoparticles supported on nitrogen-doped porous carbon as highly efficient catalysts

The group from Wuhan University reported the synthesis of nitrogen-doped porous carbon derived from MOFs. Thanks to the high surface area, high graphitization, and nitrogen doping, the as-synthesized porous carbon supported NiRh nanoparticles exhibit high catalytic activity and 100% hydrogen selectivity toward hydrogen generation from hydrazine.

Contact: Wenbo Tian
tianwb@tup.tsinghua.edu.cn
Tsinghua University Press

Public Release: 2-Nov-2015
Nano Research
Radial deformation of single-walled carbon nanotubes on quartz substrates and the resultant anomalous diameter-dependent reaction selectivity

Chemical reactivity of single-walled carbon nanotubes (SWNTs) has attracted great attentions. We find an anomalous diameter-dependent reactivity of quartz lattice-oriented SWNTs in treatment with iodine vapor, which distinctly differs from the normally higher reactivity in small-diameter tubes over the large ones. This is attributed to the large degree of radial deformation in large-diameter tubes due to strong interaction with quartz lattice. This anomalous reactivity offers a novel approach for selective removal of small-bandgap large-diameter tubes.

Contact: Wenbo Tian
tianwb@tup.tsinghua.edu.cn
Tsinghua University Press

Public Release: 31-Oct-2015
Experimental Biology and Medicine
Hypoxia-inducible factor-1 dependent nuclear entry of factor inhibiting HIF-1

Factor inhibiting HIF-1 (FIH-1) regulates hypoxia-inducible factor-1 (HIF-1) transcriptional activity by hydrolyzing asparagine at the C-terminus of HIF-1α, preventing the interaction between HIF-1α and associated cofactors and leading to suppressed activation of HIF-1. This action takes place in the nucleus but FIH-1 is a cytoplasmic protein. It’s now realized that the nuclear entry of FIH-1 is triggered by the transportation of HIF-1α from cytoplasm to the nucleus, a process that requires the presence of copper.

National Science Foundation of China NSFC-81230004

Contact: Dr. Y. James Kang
yjkang01@louisville.edu
Society for Experimental Biology and Medicine

Public Release: 30-Oct-2015
Science Bulletin
Graphene membrane is becoming a reality

Graphene is an atomically-thick sheet comprising of carbon atoms. It is the thinnest separation membrane material available in science world and its theoretical permeance is maximum currently. A review published in Science Bulletin has shown that the graphene membrane is becoming a reality.

National Natural Science Foundation of China for Distinguished Young Scientists (No. 51425603) and Key Program (No. 51236007)

Contact: BAI Bofeng
bfbai@mail.xjtu.edu.cn
Science China Press

Public Release: 30-Oct-2015
SCIENCE CHINA Physics, Mechanics & Astronomy
3-D laser printing of whispering-gallery-mode microcavities

Whispering gallery mode (WGM) microcavities have exhibited their significance in application to a variety of research fields such as quantum information. Recently, a review published in SCIENCE CHINA Physics, Mechanics & Astronomy (volume 58, Issue 11) overviewed recent progress concerning the fabrication of passive and active WGM microcavities in various materials by using femtosecond laser three-dimensional (3-D) processing techniques.

National Basic Research program of China (No.2014CB921302)

Contact: Xu Huailiang
Huailiang@jlu.edu.cn
Science China Press

Public Release: 30-Oct-2015
Scientific Reports
Immunity from H1N1 flu vaccine wears off in two years

It is generally believed that individuals who get the H1N1 flu vaccine lose their immunity to the H1N1 flu virus in about 10 years, but according to an analysis led by The Hong Kong Polytechnic University (PolyU), immunity lasts for two years.

Contact: Hailey Lai
hailey.lai@polyu.edu.hk
852-340-03853
The Hong Kong Polytechnic University

Public Release: 30-Oct-2015
SCIENCE CHINA Physics, Mechanics & Astronomy
Second harmonic generation in a high-Q lithium niobate microresonator fabricated by femtosecond laser

Second harmonic generation (SHG) in on-chip high-quality (high-Q) factor (>106) lithium niobate (LiNbO3, LN) microresonators fabricated by femtosecond laser micromachining was demonstrated. Researchers examined the efficiency of SHG with either a continuous-wave (CW) or an ultrashort pulsed pump lasers. The normalized conversion efficiencies of SHG obtained with the CW and pulsed pump lasers were measured to be 1.35×10-5 /mW and 2.30×10-6 /mW, respectively.

The National Basic Research Program of China (Grant No. 2014CB921300), and the National Natural Science Foundation of China (Grant Nos. 61275205, 11174305 and 61205209).

Contact: LIN Jintian
jintianlin@siom.ac.cn
Science China Press

Public Release: 30-Oct-2015
Science
What's done in the lab applies in the field, econ study shows

: Lab-based estimates of how worker productivity rubs off on peers are very similar to results from the field, a new report shows.

Contact: Natasha Pinol
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

Public Release: 30-Oct-2015
Science
Fossil could redefine evolutionary split between monkeys and apes

It is currently believed that great apes, including humans, diverged from small-bodied apes roughly 17 million years ago, but analysis of a younger fossil that has features of both groups may reshape our understanding of this evolutionary path.

Contact: Natasha Pinol
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

Public Release: 30-Oct-2015
Science
An enhanced lithium air battery

Using a unique combination of materials, scientists have overcome many of the current barriers to developing lithium-air batteries.

Contact: Natasha Pinol
scipak@aaas.org
202-326-6440
American Association for the Advancement of Science

Showing releases 276-300 out of 521 releases.
    Click to go to page: [ 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 ]