Application of Blue Laser Light for the Prevention of Stomal Stenosis

2021 ◽  
Vol 35 (5) ◽  
pp. 10-16
Author(s):  
Hanjae Pyo ◽  
Hyeonsoo Kim ◽  
Yeachan Lee ◽  
Hyun Wook Kang
Keyword(s):  
Laser Light ◽  
Blue Laser ◽  
Stomal Stenosis

Focusing Grating Coupler for Blue Laser Light

2004 ◽  
Vol 16 (1) ◽  
pp. 162-164 ◽  
Author(s):  
Y. Sohn ◽  
Y. Park ◽  
D. Suh ◽  
H. Ryu ◽  
M.C. Paek
Keyword(s):  
Laser Light ◽  
Blue Laser ◽  
Grating Coupler

scholarly journals Multichannel Raman Gas Analyzer: The Data Acquisition and Control System. Measurement Improvement With Blue Laser Light

2004 ◽  
Vol 53 (1) ◽  
pp. 58-66 ◽  
Author(s):  
P.G. Papageorgas ◽  
D. Maroulis ◽  
H. Winter ◽  
S.A. Karkanis ◽  
H. Albrecht ◽  
...  
Keyword(s):  
Control System ◽  
Data Acquisition ◽  
Laser Light ◽  
Blue Laser ◽  
Gas Analyzer ◽  
And Control

scholarly journals Blue laser light inhibits biofilm formation in vitro and in vivo by inducing oxidative stress

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Katia Rupel ◽  
Luisa Zupin ◽  
Giulia Ottaviani ◽  
Iris Bertani ◽  
Valentina Martinelli ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Biofilm Formation ◽  
Mammalian Cells ◽  
Bacterial Infections ◽  
Laser Light ◽  
Therapeutic Potential ◽  
Blue Laser ◽  
Data Set

Abstract Resolution of bacterial infections is often hampered by both resistance to conventional antibiotic therapy and hiding of bacterial cells inside biofilms, warranting the development of innovative therapeutic strategies. Here, we report the efficacy of blue laser light in eradicating Pseudomonas aeruginosa cells, grown in planktonic state, agar plates and mature biofilms, both in vitro and in vivo, with minimal toxicity to mammalian cells and tissues. Results obtained using knock-out mutants point to oxidative stress as a relevant mechanism by which blue laser light exerts its anti-microbial effect. Finally, the therapeutic potential is confirmed in a mouse model of skin wound infection. Collectively, these data set blue laser phototherapy as an innovative approach to inhibit bacterial growth and biofilm formation, and thus as a realistic treatment option for superinfected wounds.

Blue laser light from infrared diodes

Physics World ◽  
1990 ◽  
Vol 3 (9) ◽  
pp. 23-24
Author(s):  
Anne Tropper
Keyword(s):  
Laser Light ◽  
Blue Laser

scholarly journals Compact high-power red-green-blue laser light source generation from a single lithium tantalate with cascaded domain modulation

2009 ◽  
Vol 17 (12) ◽  
pp. 9509 ◽  
Author(s):  
P. Xu ◽  
L. N. Zhao ◽  
X. J. Lv ◽  
J. Lu ◽  
Y. Yuan ◽  
...  
Keyword(s):  
Light Source ◽  
High Power ◽  
Laser Light ◽  
Lithium Tantalate ◽  
Blue Laser ◽  
Laser Light Source

scholarly journals Growth and development of Arabidopsis thaliana under single-wavelength red and blue laser light

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Amanda Ooi ◽  
Aloysius Wong ◽  
Tien Khee Ng ◽  
Claudius Marondedze ◽  
Christoph Gehring ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Growth And Development ◽  
Laser Light ◽  
Blue Laser

scholarly journals Advanced LiFi Technology: Laser Light

2021 ◽  
Author(s):  
Sneha Kshirsagar ◽  
Laxmi Limbale ◽  
Meera Pawar ◽  
Pranita Giri ◽  
Prajakta Solankar
Keyword(s):  
Laser Diode ◽  
White Light ◽  
Heat Sink ◽  
Laser Light ◽  
Laser Diodes ◽  
Blue Laser ◽  
Transmission Capacity ◽  
Frequency Division Multiplexing ◽  
Frequency Division ◽  
Blue Laser Diode

We show fast LiFi information correspondence of more than 20 Gbit/s utilizing noticeable light from a laser-based white light radiating surface mount gadget (SMD) item stage that offers 10-100X the brilliance of regular LED sources. Furnished with high force blue laser diodes that proposal over 3.5 GHz of 3 dB transmission capacity, the laser-based white light SMD modules showed a sign to-clamor proportion (SNR) over 15 dB up to 1 GHz. The high SNR was joined with high request quadrature adequacy tweak (QAM) and symmetrical recurrence division multiplexing (OFDM) to amplify the transfer speed effectiveness. In this work, we present a laser based white light SMD module arranged with a solitary 3W blue laser diode mounted on heat-sink, optically coupled to a collimating optic, accomplishing a LiFi information pace of up 10Gbit/s. Moreover, we show frequency division multiplexing (WDM), from a white light SMD module designed with two blue laser diodes isolated in top frequency to fill in as discrete correspondence channels.

scholarly journals Enhancement of the Antibacterial Efficiency of Silver Nanoparticles against Gram-Positive and Gram-Negative Bacteria Using Blue Laser Light

2019 ◽  
Vol 2019 ◽  
pp. 1-12 ◽  
Author(s):  
Anes Al-Sharqi ◽  
Kasing Apun ◽  
Micky Vincent ◽  
Devagi Kanakaraju ◽  
Lesley Maurice Bilung
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Exposure Time ◽  
Cell Membranes ◽  
Laser Light ◽  
Blue Laser ◽  
Resistant Bacteria ◽  
Ag Nps ◽  
Antibacterial Efficiency ◽  
E Coli

Silver nanoparticles (Ag-NPs) possess excellent antibacterial properties and are considered to be an alternative material for treating antibiotic-resistant bacteria. The present study was aimed at enhancing the antibacterial efficiency of Ag-NPs using visible laser light against Escherichia coli and Staphylococcus aureus in vitro. Four concentrations of Ag-NPs (12.5, 25, 50, and 100 μg/ml), synthesized by the chemical reduction method, were utilized to conduct the antibacterial activity of prepared Ag-NPs. The antibacterial efficiencies of photoactivated Ag-NPs against both bacteria were determined by survival assay after exposure to laser irradiation. The mechanism of interactions between Ag-NPs and the bacterial cell membranes was then evaluated via scanning electron microscopy (SEM) and reactive oxygen species analysis to study the cytotoxic action of photoactivated Ag-NPs against both bacterial species. Results showed that the laser-activated Ag-NP treatment reduced the surviving population to 14% of the control in the E. coli population, while the survival in the S. aureus population was reduced to 28% of the control upon 10 min exposure time at the concentration of 50 μg/ml. However, S. aureus showed lower sensitivity after photoactivation compared to E. coli. Moreover, the effects depended on the concentration of Ag-NPs and exposure time to laser light. SEM images of treated bacterial cells indicated that substantial morphological changes occurred in cell membranes after treatment. The results suggested that Ag-NPs in the presence of visible light exhibit strong antibacterial activity which could be used to inactivate harmful and pathogenic microorganisms.

scholarly journals Laser Irradiation Effects at Different Wavelengths on Phenology and Yield Components of Pretreated Maize Seed

2020 ◽  
Vol 10 (3) ◽  
pp. 1189 ◽  
Author(s):  
Mohammed Hasan ◽  
Marlia Mohd Hanafiah ◽  
Ziad Aeyad Taha ◽  
Intsar H. H. AlHilfy ◽  
Mohd Nizam Mohd Said
Keyword(s):  
Laser Irradiation ◽  
Plant Height ◽  
Seed Yield ◽  
Yield Components ◽  
Laser Light ◽  
Second Harmonic ◽  
Block Design ◽  
Green Laser ◽  
Blue Laser ◽  
Growth And Yield

This study aims to compare the effects of different laser wavelengths, exposure times, and low-power-intensity laser irradiation on maize seeds. Seeds were exposed to He–Ne (632.8 nm) red laser, Nd:YAG second-harmonic-generation (532 nm) green laser, and diode (410 nm) blue laser. Four different exposure times (45, 65, 85, and 105 s) with different intensity (2 and 4 mW/cm2), for each laser were tested. Phenology and yield components (plant height, leaf area, number of rows per ear, seed yield, harvest index, yield efficiency, and grain weight) were determined. The experiment was conducted in a randomized complete block design with three replications. Plant height was found comparatively high in blue laser light—211 cm at 85 s. Blue and green laser lights showed significant increases in the number of rows per ear to 39.1 at 85 s and 45 at 65 s, respectively, compared to the control of 36 rows/ear. The order of seed yield was blue (7003.4 kg/ha) > green (6667.8 kg/ha) > red (6568.01 t/ha) based on different exposure times of 85 s, 85 s, and 105 s, respectively, compared to the control of 6.9 kg/ha. The findings indicate the possibility of using blue laser light to manipulate the growth and yield of maize.

Blue Laser Light Exerts Potent Anti-Biofilm Activity In Vitro and In Vivo by Inducing Oxidative Stress in Bacterial Cells

2019 ◽  
Author(s):  
Katia Rupel ◽  
Luisa Zupin ◽  
Giulia Ottaviani ◽  
Iris Bertani ◽  
Davide Porrelli ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Laser Light ◽  
Blue Laser ◽  
Bacterial Cells
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