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Caffeine stacks up against cancer: UV-Vis reveals mechanism

Date: Feb 1, 2011

Author: David Bradley

Methylxanthine alkaloids, such as caffeine, have been implicated as a risk factor in several forms of cancer. Now, UV-vis spectroscopy and other techniques have been used to reveal a possible mechanism that demonstrates they may have the opposite activity - protecting us from aromatic mutagens and carcinogens by stacking up and blocking their detrimental activity.

Read More thumbnail image: Caffeine stacks up against cancer UV-Vis reveals mechanism

Journal Highlight: Optical spectroscopy of bilayer graphene

Date: Jan 10, 2011

Author:

Infrared spectroscopy reveals unusual tunable electronic structure and optical behaviour in electrically gated bilayer graphene in which a unique tunable bandgap can lead to many new physical phenomena.

Read More thumbnail image: Journal Highlight Optical spectroscopy of bilayer graphene

Well structured: pyrrole as building block for soft materials

Date: Jan 5, 2011

Author: David Bradley

Japanese scientist Hiromitsu Maeda of Risumeikan University and his colleagues have turned to the well-known molecular motif of the pyrrole to make a new class of structured materials. By combining planar pyrrole-containing negatively charged complexes with similarly planar, positively charged organic ions they can generate fibres and soft materials, such as supramolecular gels and liquid crystals based on these organic salts.

Read More thumbnail image: Well structured pyrrole as building block for soft materials

Journal Highlight: Photoluminescence of single-wall carbon nanotube films

Date: Dec 6, 2010

Author:

Photoluminescence studies of films produced by different methods from pristine single-wall carbon nanotubes (SWNTs) were studied by optical diagnostic techniques including Raman spectroscopy, UV-VIS-NIR absorption spectroscopy and photoluminescence.

Read More thumbnail image: Journal Highlight Photoluminescence of single-wall carbon nanotube films

One for the vine: testing tannins with absorption measurements

Date: Dec 1, 2010

Author: David Bradley

At Christmas time, there's no need to be afraid...of testing your tannins at least now that US researchers have developed a sensor capable of discriminating between the different tannins present in red wine. The sensor could be used to fingerprint a wide variety of red wines with a view to confirming provenance and authenticity.

Read More thumbnail image: One for the vine testing tannins with absorption measurements

Journal Highlight: Fluorescent whole-mount method for visualizing three-dimensional relationships in intact and regenerating adult newt spinal cords

Date: Nov 15, 2010

Author:

A method was developed for visualizing the cellular and molecular events during newt spinal cord regeneration in whole-mount preparations using fluorescent probes (streptavidins and antibodies) and confocal microscopy.

Read More thumbnail image: Journal Highlight Fluorescent whole-mount method for visualizing three-dimensional relationships in intact and regenerating adult newt spinal cords

UV stink: finding natural insect repellants to protect crops

Date: Nov 1, 2010

Author: David Bradley

Japanese researchers have used UV-Vis and nuclear magnetic resonance spectroscopy to help them develop a potential repellent for the invidious stink bug, an invasive pest species that has been spreading rapidly through the USA, invading homes and damaging crops.

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Cellular & molecular Ca2+ microdomains in olfactory cilia support low signaling amplification of odor transduction

Date: Oct 11, 2010

Author:

Recordings of Ca2+ changes in individual cilia with unprecedented spatial and temporal resolution, by the use of two-photon microscopy, have provided solid evidence for the existence of Ca2+ microdomains.

Read More thumbnail image: Cellular  molecular Ca2 microdomains in olfactory cilia support low signaling amplification of odor transduction

Online Monitoring of Microwave-Enhanced Reactions by UV/Vis Spectroscopy

Date: Oct 5, 2010

Author:

Microwave-enhanced reactions are very fast in comparison to thermal reactions. They are often finished within a few minutes. Thus, the determination of the end point often fails, because conventional analytical methods are too slow. We developed a fast method using a UV/Vis sensor, which allows a direct online monitoring of the reaction process.

Read More thumbnail image: Online Monitoring of Microwave-Enhanced Reactions by UVVis Spectroscopy

Taking a leaf - soft matter photovoltaics

Date: Oct 1, 2010

Author: David Bradley

US researchers have demonstrated that water-gel-based solar devices can act like "artificial leaves" heralding the possibility of soft matter solar energy conversion devices.

Read More thumbnail image: Taking a leaf - soft matter photovoltaics
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