Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Bactericidal effectiveness of modulated UV light.

H L Bank1, J John, M K Schmehl

  • 1Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston.

Applied and Environmental Microbiology
|December 1, 1990
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Dental public health in action: Oral health messaging and the smoking cessation team.

Community dental health·2026
Same author

Oral health disparities among children with special healthcare needs: a comparative cross-sectional study.

European archives of paediatric dentistry : official journal of the European Academy of Paediatric Dentistry·2025
Same author

Comparison of ultraviolet C light and isopropyl alcohol for the disinfection of cellular phones in a paediatric intensive care unit setting.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2024
Same author

The South African guidelines on enuresis: 2024 update.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2024
Same author

Nocturnal enuresis: A call for advocacy.

South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde·2024
Same author

High aerospora levels and associated atmospheric circulation patterns: Pretoria, South Africa.

International journal of biometeorology·2024
Same journal

Assessing the effects of ocean alkalinity enhancement on marine protozoa: physiological dynamics and transcriptomic responses.

Applied and environmental microbiology·2026
Same journal

The <i>Streptococcus mutans</i> collagen-binding protein Cnm enhances early biofilm formation with <i>Candida albicans</i>.

Applied and environmental microbiology·2026
Same journal

Response of <i>Zostera japonica</i> rhizosphere bacteria to ocean acidification.

Applied and environmental microbiology·2026
Same journal

Dynamics of clinical <i>Klebsiella pneumoniae</i> strains over the COVID-19 pandemic in Qingdao, China.

Applied and environmental microbiology·2026
Same journal

A set of constitutive promoters with graded strengths for gene expression in diverse cyanobacterial strains.

Applied and environmental microbiology·2026
Same journal

Sources and traits of bacteria and fungi found in the near-surface atmosphere.

Applied and environmental microbiology·2026
See all related articles

Pulsed modulated ultraviolet (UV) light effectively killed bacteria by reducing colonies significantly. Standard UV light at the same intensity and duration was far less effective, showing the importance of modulation for bacterial inactivation.

Area of Science:

  • Microbiology
  • Biophysics
  • Photochemistry

Background:

  • Ultraviolet (UV) light is a known germicide.
  • The specific mechanisms of UV light for bacterial inactivation are still being explored.
  • Modulated light waveforms may offer novel antimicrobial properties.

Purpose of the Study:

  • To investigate the efficacy of pulsed modulated UV light waveforms in killing bacteria.
  • To compare the bactericidal effects of modulated UV light versus standard UV light.

Main Methods:

  • Bacterial strains were exposed to pulsed modulated UV light.
  • The same bacterial strains were exposed to UV light without modulation.
  • Colony counts were used to quantify bacterial survival after treatment.

Related Experiment Videos

Main Results:

  • Exposure to pulsed modulated UV light reduced bacterial colonies from a confluent lawn to less than 20.
  • UV light lacking modulation resulted in approximately 2,000 surviving colonies under identical conditions.
  • The modulated information encoded in UV light significantly enhanced bacterial killing.

Conclusions:

  • Pulsed modulated UV light waveforms demonstrate superior bactericidal effectiveness compared to standard UV light.
  • The modulation of UV light is a critical factor for enhanced bacterial inactivation.
  • This technology holds potential for advanced disinfection applications.