14 Result(s)

Article

Small doses from artificial UV sources elucidate the photo-production of vitamin D

To clarify the relation between UV exposure and vitamin D status, 201 volunteers wore personal electronic UV dosimeters during daylight hours, to record their UV exposure over a 10 week period when ambient UV ...

Richard McKenzie, Ben Liley, Paul Johnston… in Photochemical & Photobiological Sciences (2013)

Chapter

Solar Radiation and Human Health

Solar radiation has both direct and indirect impacts on human health. Only direct effects are described here. (Space is too limited to describe the indirect effects, which are numerous, complex and imbedded in...

Gunther Seckmeyer, Armin Zittermann, Richard McKenzie… in Environmental Toxicology (2013)

Article

Serum 25-hydroxyvitamin-D responses to multiple UV exposures from solaria: inferences for exposure to sunlight

We investigate the relationship between blood serum 25-hydroxyvitamin D (25(OH)D) and UV exposure from two artificial sources. We then use the results to test the validity of the action spectrum for vitamin D ...

Richard McKenzie, Robert Scragg, Ben Liley… in Photochemical & Photobiological Sciences (2012)

Article

UV impacts avoided by the Montreal Protocol

Temporal and geographical variabilities in the future “world expected” UV environment are compared with the “world avoided”, which would have occurred without the Montreal Protocol on Substances That Deplete t...

Paul A. Newman, Richard McKenzie in Photochemical & Photobiological Sciences (2011)

Article

Europe’s darker atmosphere in the UV-B

Irradiation in the ultraviolet wavelength range is found to be up to 50% lower in the European summer compared to sites with comparable latitudes in New Zealand. We have developed a method to quantitatively at...

Gunther Seckmeyer, Merle Glandorf… in Photochemical & Photobiological Sciences (2008)

Article

Geographical differences in erythemally-weighted UV measured at mid-latitude USDA sites

UsV measurements from instruments maintained by USDA at 16 mid-latitude sites were analysed to investigate geographic differences. Fifteen of the sites are in North America, and one is in New Zealand. The inst...

Richard McKenzie, Greg Bodeker, Gwen Scott… in Photochemical & Photobiological Sciences (2006)

Article

Enhanced UV exposure on a ski-field compared with exposures at sea level

Personal erythemal UV monitoring badges, which were developed to monitor the UV exposure of school children, were used to measure UV exposures received by one of the authors (MA) at the Mt Hutt ski-field, in N...

Martin Allen, Richard McKenzie in Photochemical & Photobiological Sciences (2005)

Article

Relationship between UVB and erythemally weighted radiation

We discuss the move from reporting damaging UV radiation in terms of UVB to the now widely accepted erythemally weighted UV radiation (UV_Ery) and the UV Index (UVI). The relationship between these quantities is g...

Richard McKenzie, Dan Smale, Michael Kotkamp in Photochemical & Photobiological Sciences (2004)

Article

The decline of America: Myth or fate?

Richard McKenzie in Society (1989)

Chapter

What Should Be Done for Manufacturing?

This session was organized to address a straightforward question: What should government do for manufacturing?

Richard McKenzie in American Manufacturing in a Global Market (1989)