Conjugated Polymer Modifying TiO Performance for Visible-Light Photodegradation of Organics.

Up to now, the use of TiO has been considered a promising advanced technology for organic pollutants removal from air or water, since it has high biological and chemical stability, high photoactivity, low toxicity, and low-cost production. However, there are issues to be addressed in enhancing TiO performance, and one of the current key issues is redesigning UV-active photocatalysts and making them active in the visible region of the electromagnetic spectrum. This way, solar light absorption will be insured, and thus, a more efficient photocatalyst could be obtained.

The curious case of a forehead metatypical basal cell carcinoma.

The risk of developing basal cell carcinoma (BCC) during lifetime varies between 29-55%, while for squamous cell carcinoma (SCC) varies between 7-11%. Between them, considered to be a BCC, there is a particular histological type, named metatypical basal cell carcinoma (MTC) or basosquamous cell carcinoma (BSCC). In this paper, we presented a rare case of metatypical carcinoma of the forehead with an interesting history of unexpected recurrences, underlining the clinical, therapeutic and histological essential aspects that may come in use to other clinicians in managing this type of cancer.

Enhancement of high harmonics generated by field steering of electrons in a two-color orthogonally polarized laser field.

We demonstrate enhancement by 1 order of magnitude of the high-order harmonics generated in argon by combining a fundamental field at 1300 nm (10(14) W cm(-2)) and its orthogonally polarized second harmonic at 650 nm (2 × 10(13) W cm(-2)) and by controlling the relative phase between them. This extends earlier work by ensuring that the main effect is the combined field steering the electron trajectory with negligible contribution from multiphoton effects compared to the previous schemes with 800/400 nm fields. We access a broad energy range of harmonics (from 20 eV to 80 eV) at a low laser intensity (far below the ionization saturation limit) and observe deep modulation of the harmonic yield with a period of π in the relative phase.

Instantaneous mapping of coherently coupled electronic transitions and energy transfers in a photosynthetic complex using angle-resolved coherent optical wave-mixing.

Understanding the role of coherent electronic motion is expected to resolve general questions of importance in macromolecular energy transfer. We demonstrate a novel nonlinear optical method, angle-resolved coherent wave mixing, that separates out coherently coupled electronic transitions and energy transfers in an instantaneous two-dimensional mapping. Angular resolution of the signal is achieved by using millimeter laser beam waists at the sample and by signal relay to the far field; for this we use a high energy, ultrabroadband hollow fiber laser source.

The involvement of endogenous opiates in emotional-cognitive interaction in stress.

Stress system is very important in the co-ordination of the generalised stress response, which takes place when a stressor of any kind exceeds a threshold. In our experiments we have analysed aspects of opiate involvement in the interactions among the emotional, motivational and cognitive processes, as well as aspects concerning the relations between physiological and behavioural mechanisms, both in normal conditions and under stress. We also analysed aspects of the interaction between stress system and endogenous opioid systems (e.