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Journal Highlight: Fluorescence spectroscopy characterization of cadmium sulfide quantum dots on metal, insulator, and semiconductor substrates

Date: May 9, 2011

Author:

Fluorescence spectroscopy has been used to identify the range and maxima of excitation and emission spectra of colliodal cadmium sulfide quantum dots capped with dioctyl sulfosuccinate, deposited upon substrates of gold, mica and gallium arsenide.

Read More thumbnail image: Journal Highlight Fluorescence spectroscopy characterization of cadmium sulfide quantum dots on metal insulator and semiconductor substrates

Cloudy correction: spectral change needed

Date: May 1, 2011

Author: David Bradley

Atmospheric and climate models may have overlooked the fact that exactly how clouds appear to reduce the amount of sunlight available for warming the surface of the earth depends on the wavelength being measured across the spectrum from infrared to ultraviolet. The finding could now help researchers improve climate models by factoring in the effects of cloud cover more precisely.

Read More thumbnail image: Cloudy correction spectral change needed

Journal Highlight: Accuracy of optical spectroscopy for the detection of cervical intraepithelial neoplasia: Testing a device as an adjunct to colposcopy

Date: Apr 11, 2011

Author:

An effective classification algorithm was derived for optical spectroscopy as an adjunct to colposcopy and preliminary estimates of its accuracy were obtained for the detection of cervical intraepithelial neoplasia or worse.

Read More thumbnail image: Journal Highlight Accuracy of optical spectroscopy for the detection of cervical intraepithelial neoplasia Testing a device as an adjunct to colposcopy

A life-extending molecule to dye for: fluorescent revelations

Date: Apr 1, 2011

Author: David Bradley

Worms live longer if protein homeostasis is maintained by adding a dye molecule to their diet, according to new study. The dye molecule Thioflavin T precludes the kind of protein misfolding that, in humans, leads to aging effects and Alzheimer's disease.

Read More thumbnail image: A life-extending molecule to dye for fluorescent revelations

Journal Highlight: Optical properties of modified epoxy resin with various oxime derivatives in the UV-VIS spectral region

Date: Mar 14, 2011

Author:

Optical absorbance measurements have been performed on an epoxy resin and the composites prepared by its modification with two different oxime derivatives (benzaldoxime and 2-furaldoxime) at 190-680 nm by unpolarized light and the data have been used to determine various optical properties.

Read More thumbnail image: Journal Highlight Optical properties of modified epoxy resin with various oxime derivatives in the UV-VIS spectral region

It's in the brew: coffee antioxidants formed by roasting

Date: Mar 1, 2011

Author: David Bradley

UV-Vis spectroscopy and fluorescence studies reveal that the antioxidants in coffee with the most potent assumed health benefits are formed by the roasting of beans rather than being present in the raw green beans. The results are reported in detail in the journal Food Research International.

Read More thumbnail image: Its in the brew coffee antioxidants formed by roasting

Journal Highlight: Two-photon fluorescence real-time imaging on the development of early mouse embryo by stages

Date: Feb 7, 2011

Author:

Early mouse embryo development from zygote to 8-cell stage compaction was observed in real-time by stages using two-photon laser scanning microscopy, optimizing several scanning parameters in different development stages.

Read More thumbnail image: Journal Highlight Two-photon fluorescence real-time imaging on the development of early mouse embryo by stages

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
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