Escuelas

EurekAlert!

Subscribe to canal de noticias EurekAlert! EurekAlert!
The premier online source for science news since 1996. A service of the American Association for the Advancement of Science.
Actualizado: hace 18 horas 16 mins

Ultra ultrasound to transform new tech

Mar, 01/15/2019 - 23:00
Scientists at University of Queensland and Swansea University department of Physics have developed a new, more sensitive method to measure ultrasound waves.

What is clean breathing water?

Mar, 01/15/2019 - 23:00
Researchers from Arizona State University and Drexel University have developed a more detailed framework for understanding and managing the risk of transmitting a bacterial disease via water spray from sinks, showers and toilets. As continuous testing of indoor water is not always feasible, the guidelines can help to identify water use situations that could increase the risk of exposure.

Fighting the crave for fattening food? Just surround yourself in its scent

Mar, 01/15/2019 - 23:00
A new study proves one sense can compensate another.

Climate change: How could artificial photosynthesis contribute to limiting global warming?

Mar, 01/15/2019 - 23:00
If CO2 emissions do not fall fast enough, then CO2 will have to be removed from the atmosphere to limit global warming. Not only could planting new forests and biomass contribute to this, but new technologies for artificial photosynthesis as well. Physicists have estimated how much surface area such solutions would require. Although artificial photosynthesis could bind CO2 more efficiently than the natural model, huge investments into research are needed to upscale the technology.

Mechanism helps explain the ear's exquisite sensitivity

Mar, 01/15/2019 - 23:00
Researchers at MIT decode the way structures in the inner ear give our hearing its remarkable sensitivity and selectivity.

Trends over time in antibiotic prescribing by dermatologists

Mar, 01/15/2019 - 23:00
This study looked at trends over time in oral antibiotic prescribing by dermatologists using commercial insurance claims data for almost 986,000 courses of oral antibiotics prescribed by nearly 12,000 dermatologists.

Did quality of care, outcomes improve for hospitalized heart attack patients in states that expanded Medicaid?

Mar, 01/15/2019 - 23:00
Lack of insurance is associated with worse care and outcomes among adults hospitalized for a heart attack. It is unclear whether states that expanded Medicaid eligibility under the Patient Protection and Affordable Care Act in 2014 had an associated improvement in quality of care and outcomes among low-income patients hospitalized with a heart attack.

European assessment of Glyphosate is quality-assured and independent

Mar, 01/15/2019 - 23:00
The German Federal Institute for Risk Assessment (BfR) already prepared the first draft of its health assessment of glyphosate (RAR) in 2013. Since then the BfR has received repeated inquires foremost regarding the independence of the European institutions and the assessment procedure.

Jellyfish map could be the future to protecting UK waters and fish

Mar, 01/15/2019 - 23:00
A University of Southampton research team has developed a map of chemicals found in Jellyfish caught across 1 million square-kilometres of UK waters. The same chemicals are found in other marine animals such as birds and fish.These findings can support conservation efforts by helping track an animals movements and also be used as a tool to detect food fraud by identifying where seafood products were sourced from.

Health risks through fumigated containers

Mar, 01/15/2019 - 23:00
Products transported by sea in containers are often fumigated with biocides as protection against pests. In addition to this, they often contain volatile organic solvents, such as the potentially carcinogenic 1,2-dichloroethane, which can originate from cleaning or manufacturing processes.In a meeting held at the German Federal Institute for Risk Assessment (BfR) on 16 November 2018, 36 experts from science, monitoring authorities, trade and industry discussed the effects of substances of this kind on health, along with the need for future action.

Nudging does not necessarily improve decisions

Mar, 01/15/2019 - 23:00
Nudging, the concept of influencing people's behavior without imposing rules, bans or coercion, is an idea that government officials and marketing specialists alike are keen to harness, and itis often viewed as a one-size-fits-all solution. Now, a study by researchers from the University of Zurich puts things into perspective: Whether a nudge really does improve decisions depends on a person's underlying decision-making process.

Chaos in the body tunes up your immune system

Mar, 01/15/2019 - 23:00
Chaos in bodily regulation can optimize our immune system according to a recent discovery made by researchers at the University of Copenhagen's Niels Bohr Institute. The discovery may prove to be of great significance for avoiding serious diseases such as cancer and diabetes.

Leuven experts push the boundaries of 3D microscopy

Mar, 01/15/2019 - 23:00
Two newly developed methods will help researchers to study the 3D structure of complex surfaces and of individual neurons better than ever before. Sebastian Munck and Natalia Gunko, two expert technologists at VIB-KU Leuven, report new imaging protocols that will advance neuroscience and (bio)imaging in general.

Identifying 'friends' in an objective manner

Mar, 01/15/2019 - 23:00
Dr. Teruyoshi Kobayashi of Kobe University and his team developed a new method for identifying individuals that have essential connections between them -- what they call 'significant ties'. Dr. Kobayashi says: "The point is that we need to distinguish between the contact events that could happen by chance and the events that would not happen without a significant relationship between two individuals." Their findings were published in Nature Communications on January 15.

First example of copper catalyzed/mediated direct b-h alkenylation/alkynylation in carboranes

Mar, 01/15/2019 - 23:00
Base metal catalyzed regioselective cage B-H functionalization has been achieved. Under the assistance of a bidentate directing group, Cu-catalyzed [4+2] annulation of carboranyl amides with internal alkynes affords unprecedented C,B-substituted carborane-fused-pyridone derivatives, whereas the use of terminal alkynes leads to B-H/C(sp)-H dehydrocoupling products. The isolation and structural identification of a notably stable Cu(I) intermediate shed light on the reaction mechanism, which is proposed to involve a Cu(III) intermediate.

Advances and challenges in precise nanomedicine for intelligent therapy of cancer

Mar, 01/15/2019 - 23:00
The authors demonstrate the recent advances of intelligent cancer nanomedicine, and discuss the comprehensive understanding of their structure-function relationship for smart and efficient cancer nanomedicine including various imaging and therapeutic applications, as well as nanotoxicity. In particular, a few emerging strategies that have advanced cancer nanomedicine are also highlighted such as tumor imprisonment, supramolecular chemotherapy, and DNA nanorobot. The challenge and outlook of some scientific and engineering issues are also discussed in future development.

Ammonia by phosphorus catalysis

Mar, 01/15/2019 - 23:00
More than 100 years after the introduction of the Haber-Bosch process, scientists continue to search for alternative ammonia production routes that are less energy demanding. Chinese scientists have now discovered that black phosphorus is an excellent catalyst for the electroreduction of nitrogen to ammonia. According to their study published in the journal Angewandte Chemie, layered black phosphorus nanosheets are a highly selective and efficient catalyst in this process.

How manganese produces a parkinsonian syndrome

Mar, 01/15/2019 - 23:00
Using X-ray fluorescence at synchrotrons DESY and ESRF, researchers in the Centre d'Etudes Nucléaires de Bordeaux Gradignan (CNRS/Université de Bordeaux) have demonstrated the consequences of a mutation responsible for a hereditary parkinsonian syndrome: accumulated manganese in the cells appears to disturb protein transport. This work, carried out with colleagues at the University of Texas at Austin (USA), was published in ACS Chemical Neuroscience on January 16, 2018.

Preparation, characterization and in vitro biological activity of Soyasapogenol B

Mar, 01/15/2019 - 23:00
Using Multi-Walled Carbon Nanotubes (MWCNTs) as a drug delivery system, can avoid the need for solvents and preventing drug precipitation in aqueous solution. Soyasapogenol B (SSB) acts as an important therapeutic agent owing to its numerous reported biological activities.

AGA releases guide to care for women with IBD throughout family planning

Mar, 01/15/2019 - 23:00
The American Gastroenterological Association (AGA) announced 'Inflammatory Bowel Disease (IBD) in Pregnancy Clinical Care Pathway - A Report from the American Gastroenterological Association IBD Parenthood Project Working Group' published online today ahead of print. The new pathway creates a standardized work flow among health care providers (HCPs) who treat women with IBD throughout all stages of family planning.

Páginas