IADVL
Indexed with PubMed and Science Citation Index (E) 
 
Users online: 5552 
     Home | Feedback | Login 
About Current Issue Archive Ahead of print Search Instructions Online Submission Subscribe What's New Contact  
  NAVIGATE Here 
    Next article
    Previous article
    Table of Contents

 RESOURCE Links
    Similar in PUBMED
    Search Pubmed for
    Search in Google Scholar for
  Related articles
    Citation Manager
    Access Statistics
    Reader Comments
    Email Alert *
    Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed29179    
    Printed585    
    Emailed21    
    PDF Downloaded1    
    Comments [Add]    
    Cited by others 8    

Recommend this journal

 

 ORIGINAL ARTICLE
Year : 2002  |  Volume : 68  |  Issue : 4  |  Page : 198--201

UVA and UVB in sunlight, Optimal Utilization of UV rays in Sunlight for phototherapy


1 Department of Dermatology, PSG Institute of Medical Science and Research, Peelamede, Coimbatore, India
2 Department of Physics, PSG Institute of Technology, Coimbatore, India

Correspondence Address:
C R Srinivas
Department of Physics, PSG Institute of Technology, Coimbatore
India
Login to access the Email id

Source of Support: None, Conflict of Interest: None


PMID: 17656935

Rights and PermissionsRights and Permissions

The disadvantages of sunlight as the source of UVA for phototherapy include variation with time, place, season, and atmospheric conditions. In the present study at Coimbatore, India we measured the UVa and UVB irradiance for one year using PMA 2100 meter. UVB irradiance was mazimum between 12.00 noon- 1.00 p.m (19.50w/cm2 to 40.2w/cm2) and UVA between 12 noon-1.15 p.m. (4.70mw/cm2 tp 6.59mw/cm2). The ratio of UVA was 1:500 to 1:600 during early hours and late evening and 1:200 during mid-day. At peak time (11.30 a.m. to 1.30 p.m.), the exposure time for 1 June of UVA was 2 min. 32 sec. to 4 min. 31 sec and for 10mj of UVB it was from 4 min. 55 sec. to 11 min. 22 sec. We recommend the ideal time for UVB phototheraphy between 11.00 a.m. to 2.00 p.m. and for PUVASOL between 9.30 a.m. to 11 a.m. and 2 p.m. to 3.30 p.m. when incidental UVB and infrared rays responsible for heat are less.






[FULL TEXT] [PDF Not available]*


        
Print this article     Email this article

Online since 15th March '04
Published by Wolters Kluwer - Medknow