Until now, there was no clear way to answer that question. Scientists are reporting development of a new method for screening molecules and predicting how certain materials, ranging from chemicals used in carpeting to electronics, will contribute to global warming. Their study is scheduled for the Nov. 12 issue of ACS' Journal of Physical Chemistry A, a weekly publication.
In the new study, Timothy Lee, Partha Bera, and Joseph Francisco note that carbon dioxide is the main greenhouse gas, which traps heat near Earth's surface like the panes of glass in a greenhouse. However, other gases have the same effect, and in fact are even more efficient greenhouse gases than carbon dioxide. Scientists know that the molecules in gases differ in their ability to contribute to global warming. But they know little about the hows and whys – the molecular basis of those differences.
The scientists analyzed more than a dozen molecules involved in global warming to find out which chemical and physical properties are most important in determining their inherent radiative efficiency, and thus possess the largest potential to contribute to global warming. They found that molecules containing several fluorine atoms tend to be strong greenhouse gases, compared to molecules containing chlorine and/or hydrogen. They found for the first time that molecules containing several fluorine atoms bonded to the same carbon increase their radiative efficiency in a non-linear fashion. "It is hoped that the results from this study will be used in the design of more environmentally friendly materials," the study notes.
ARTICLE #1 FOR IMMEDIATE RELEASE "Identifying the Molecular Origin of Global Warming"
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Michael Woods | EurekAlert!
New study: How does Europe become a leading player for software and IT services?
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Staphylococcus aureus is a feared pathogen (MRSA, multi-resistant S. aureus) due to frequent resistances against many antibiotics, especially in hospital infections. Researchers at the Paul-Ehrlich-Institut have identified immunological processes that prevent a successful immune response directed against the pathogenic agent. The delivery of bacterial proteins with RNA adjuvant or messenger RNA (mRNA) into immune cells allows the re-direction of the immune response towards an active defense against S. aureus. This could be of significant importance for the development of an effective vaccine. PLOS Pathogens has published these research results online on 25 May 2017.
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Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.
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Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
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