Impact of solar ultraviolet B radiation (290–320 nm) on vitamin D synthesis in children with type IV and V skin

2015 ◽  
Vol 173 (2) ◽  
pp. 604-606 ◽  
Author(s):  
R.K. Marwaha ◽  
V. Sreenivas ◽  
D. Talwar ◽  
V.K. Yenamandra ◽  
A. Challa ◽  
...  
Keyword(s):  
Vitamin D ◽  
Ultraviolet B ◽  
Ultraviolet B Radiation ◽  
Type Iv ◽  
Solar Ultraviolet

Changes in grapevine DNA methylation and polyphenols content induced by solar ultraviolet-B radiation, water deficit and abscisic acid spray treatments

2019 ◽  
Vol 135 ◽  
pp. 287-294 ◽  
Author(s):  
Carlos Marfil ◽  
Verónica Ibañez ◽  
Rodrigo Alonso ◽  
Anabella Varela ◽  
Rubén Bottini ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Abscisic Acid ◽  
Water Deficit ◽  
Ultraviolet B ◽  
Ultraviolet B Radiation ◽  
Solar Ultraviolet

scholarly journals Which Environmental Factor Is Correlated with Long-Term Multiple Sclerosis Incidence Trends: Ultraviolet B Radiation or Geomagnetic Disturbances?

2017 ◽  
Vol 2017 ◽  
pp. 1-11
Author(s):  
Seyed Aidin Sajedi ◽  
Fahimeh Abdollahi
Keyword(s):  
Vitamin D ◽  
Vitamin D Deficiency ◽  
Geomagnetic Disturbance ◽  
Ultraviolet B ◽  
Geomagnetic Disturbances ◽  
Incidence Trends ◽  
Ultraviolet B Radiation ◽  
Cross Correlation Analysis ◽  
Positive Correlations

Background. Insufficient received ultraviolet B radiation (UV) is regarded as the main environmental risk factor (RF) for MS in vitamin D deficiency hypothesis. Nevertheless, geomagnetic disturbance (GMD) has also been proposed as a potential trigger for MS in GMD hypothesis. The aim of this study was to investigate which of these mentioned RF is correlated with long-term ultradecadal MS incidence. Methods. After a systematic search, long-term incidence reports of the United Kingdom (UK), Denmark, Tayside County, Nordland County, the Orkney, and Shetland Islands were selected for this retrospective time-series study. Possible lead-lag relationships between MS incidence, GMD, and UV were evaluated by cross-correlation analysis. Results. Significant positive correlations between GMD and MS incidence were seen in Tayside County (at lag of 2 years: rS = 0.38), Denmark (peak correlation at lag of 2 years: rS = 0.53), and UK (at lag of 1 year: rS = 0.50). We found a positive correlation between received UV and MS incidences in the Nordland at lag of 1 year (rS = 0.49). Conclusion. This study found significant positive correlations between alterations in GMD with alterations in long-term MS incidence in three out of six studied locations and supports the GMD hypothesis. The observed significant correlation between MS and UV is positive; hence it is not supportive for UV related vitamin D deficiency hypothesis.

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