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Black and White and Colour

Nickel release from white gold.

Nickel is still the most frequent cause of contact allergy, despite the EU regulation limiting nickel release from consumer items intended for prolonged contact with the skin, such as jewellery, buttons, and watches. It is obvious that the current restriction is insufficient (1). It has been shown that nickel is deposited onto the skin by short and repetitive contact in amounts sufficient to ca...

Combination of Colour Favoured and Colour

In this research we described the effective Hamiltonian theory and applied this theory to the calculation of current-current (Q1,2) and QCD penguin (Q3,…,6) c quark decay rates. We calculated the decay rates of semileptonic and hadronic of charm quark in the effective Hamiltonian theory. We investigated the decay rates of D meson decays according to Spectator Quark Model (SQM) for the calculati...

Mortality of white South African gold miners.

OBJECTIVES This two part study aimed to determine whether there was an excess mortality generally or for some diseases among middle aged white South African gold miners on the Witwatersrand and whether the underground dust exposure of these miners contributed to the development of lung cancer, chronic obstructive pulmonary disease (COPD), or ischaemic heart disease (IHD). METHODS A cohort of ...

A Colour Palette for Automatic Detection of Blue-White Veil

Colour assessment of pigmented skin lesions are essential for the diagnosis of malignant melanoma. However, visual interpretation of colour is subjective and prone to error. Computer programs can provide support to clinicians to overcome this subjectivity. So far, methods for colour analysis of this nature have utilised statistical classification models. This paper puts forward an alternative f...