Sunscreens – Which and What for?

Sunscreens - which and what for?

It is well established that sun exposure is the main cause for the development of skin cancer. Chronic continuous UV radiation is believed to induce malignant melanoma, whereas intermittent high-dose UV exposure contributes to the occurrence of actinic keratosis as precursor lesions of squamous cell carcinoma as well as basal cell carcinoma. Not only photocarcinogenesis but also the mechanisms ...

The Future of Sunscreens – What Lies Beyond SPF 50+?

Semantic Underspecification : Which Technique for What

In recent years a variety of representation formalisms have been proposed that support the construction of underspecified semantic representations, such as Quasi-Logical Form, Underspecified Logical Form, Underspecified Discourse Representation Theory, Minimal Recursion Semantics, Ontological Promiscuity, Hole Semantics, the Constraint Language for Lambda Structures, and Normal Dominance Constr...

Semantic Underspecification : Which Technique for What Purpose ?

In recent years a variety of representation formalisms have been proposed that support the construction of underspecified semantic representations, such as Quasi-Logical Form, Underspecified Logical Form, Underspecified Discourse Representation Theory, Minimal Recursion Semantics, Ontological Promiscuity, Hole Semantics, the Constraint Language for Lambda Structures, and Normal Dominance Constr...

Microbial sunscreens

Basking in the sun on an Australian beach, I began to feel a burning sensation from excessive UV irradiation and decided not to wait for the ozone layer to return. As first aid I scraped some algae and cyanobacteria from the blistering rocks and smeared them on my exposed skin. Why? Because these organisms contain sunscreen compounds to protect themselves from harmful doses of UV-B (280–315 nm)...