Abstract
Accurate studies of the biological effects of UVB radiation require suitable laboratory sources. Lamps labeled as UVB sources often emit UVC radiation that contributes significantly to the levels of DNA damage. The UVC from an unfiltered UVB source produced more pyrimidine dimers in soybean DNA than a lamp filtered by a Pyrex dish that removes wavelengths of < 280 nm. Calculations based on action spectra and on the emission spectra of unfiltered lamps indicate that UVC contributes ~ 13%, 4% and ~ 1% of the total dimers induced in unshielded cells or DNA, alfalfa cotyledons, and human skin, respectively. Further, relative to a Pyrex dish-filtered lamp, an unfiltered lamp would produce ~ 7-, 2.4- or 2.8-fold more dimers in these three biological systems. We report here that a Pyrex dish provides an effective, stable, robust and inexpensive filter for reducing or excluding the contribution of UVC to damage induced by broad-spectrum 'UVB' lamps.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 34-40 |
| Number of pages | 7 |
| Journal | Journal of Photochemistry and Photobiology B: Biology |
| Volume | 43 |
| Issue number | 1 |
| DOIs | |
| State | Published - Apr 1 1998 |
| Externally published | Yes |
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Keywords
- Cyclobutyl pyrimidine dimer
- Environmental photobiology
- UV filter
- UV radiation
ASJC Scopus subject areas
- Plant Science
- Bioengineering
- Physical and Theoretical Chemistry
Cite this
A robust, inexpensive filter for blocking UVC radiation in broad-spectrum 'UVB' lamps. / Lepre, A. M.; Sutherland, John C.; Trunk, J. G.; Sutherland, B. M.
In: Journal of Photochemistry and Photobiology B: Biology, Vol. 43, No. 1, 01.04.1998, p. 34-40.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A robust, inexpensive filter for blocking UVC radiation in broad-spectrum 'UVB' lamps
AU - Lepre, A. M.
AU - Sutherland, John C.
AU - Trunk, J. G.
AU - Sutherland, B. M.
PY - 1998/4/1
Y1 - 1998/4/1
N2 - Accurate studies of the biological effects of UVB radiation require suitable laboratory sources. Lamps labeled as UVB sources often emit UVC radiation that contributes significantly to the levels of DNA damage. The UVC from an unfiltered UVB source produced more pyrimidine dimers in soybean DNA than a lamp filtered by a Pyrex dish that removes wavelengths of < 280 nm. Calculations based on action spectra and on the emission spectra of unfiltered lamps indicate that UVC contributes ~ 13%, 4% and ~ 1% of the total dimers induced in unshielded cells or DNA, alfalfa cotyledons, and human skin, respectively. Further, relative to a Pyrex dish-filtered lamp, an unfiltered lamp would produce ~ 7-, 2.4- or 2.8-fold more dimers in these three biological systems. We report here that a Pyrex dish provides an effective, stable, robust and inexpensive filter for reducing or excluding the contribution of UVC to damage induced by broad-spectrum 'UVB' lamps.
AB - Accurate studies of the biological effects of UVB radiation require suitable laboratory sources. Lamps labeled as UVB sources often emit UVC radiation that contributes significantly to the levels of DNA damage. The UVC from an unfiltered UVB source produced more pyrimidine dimers in soybean DNA than a lamp filtered by a Pyrex dish that removes wavelengths of < 280 nm. Calculations based on action spectra and on the emission spectra of unfiltered lamps indicate that UVC contributes ~ 13%, 4% and ~ 1% of the total dimers induced in unshielded cells or DNA, alfalfa cotyledons, and human skin, respectively. Further, relative to a Pyrex dish-filtered lamp, an unfiltered lamp would produce ~ 7-, 2.4- or 2.8-fold more dimers in these three biological systems. We report here that a Pyrex dish provides an effective, stable, robust and inexpensive filter for reducing or excluding the contribution of UVC to damage induced by broad-spectrum 'UVB' lamps.
KW - Cyclobutyl pyrimidine dimer
KW - Environmental photobiology
KW - UV filter
KW - UV radiation
UR - http://www.scopus.com/inward/record.url?scp=0032052033&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0032052033&partnerID=8YFLogxK
U2 - 10.1016/S1011-1344(98)00079-7
DO - 10.1016/S1011-1344(98)00079-7
M3 - Article
C2 - 9639912
AN - SCOPUS:0032052033
VL - 43
SP - 34
EP - 40
JO - Journal of Photochemistry and Photobiology B: Biology
JF - Journal of Photochemistry and Photobiology B: Biology
SN - 1011-1344
IS - 1
ER -