scholarly journals Low-level psoralen-deoxyribonucleic acid crosslinks induced by single laser pulses

Biochemistry ◽  
1981 ◽  
Vol 20 (4) ◽  
pp. 739-745 ◽  
Author(s):  
Brian H. Johnston ◽  
John E. Hearst
Keyword(s):  
Deoxyribonucleic Acid ◽  
Laser Pulses ◽  
Low Level ◽  
Single Laser

Demineralization Inhibition by High‐Speed Scanning of 9.3 µm CO 2 Single Laser Pulses Over Enamel

2020 ◽  
Author(s):  
Ali H. Badreddine ◽  
Stephen Couitt ◽  
Julia Donovan ◽  
Roni Cantor‐Balan ◽  
Charles Kerbage ◽  
...  
Keyword(s):  
High Speed ◽  
Laser Pulses ◽  
Single Laser

scholarly journals Deoxyribonucleic Acid Probes Analyses for the Detection of Periodontal Pathogens

2015 ◽  
Vol 16 (9) ◽  
pp. 727-732
Author(s):  
Zoubeida AL Yahfoufi ◽  
Wahib Hadchiti ◽  
Antoine Berberi
Keyword(s):  
Deoxyribonucleic Acid ◽  
Periodontal Diseases ◽  
Detection Threshold ◽  
High Sensitivity ◽  
Cost Effective ◽  
Dna Probe ◽  
Microbial Pathogens ◽  
Periodontal Pathogens ◽  
Culture Methods ◽  
Low Level

ABSTRACT Background In clinical microbiology several techniques have been used to identify bacteria. Recently, Deoxyribonucleic acid (DNA)-based techniques have been introduced to detect human microbial pathogens in periodontal diseases. Deoxyribonucleic acid probes can detect bacteria at a very low level if we compared with the culture methods. These probes have shown rapid and cost-effective microbial diagnosis, good sensitivity and specificity for some periodontal pathogens in cases of severe periodontitis. Materials and methods Eighty-five patients were recruited for the study. Twenty-one subjects ranging between 22 and 48 years of age fulfilled the inclusion and exclusion criteria. Seventy-eight samples became available for DNA probe analysis from the deepest pockets in each quadrant. Results All 21 patients showed positive results for Prevotella intermedia; also, Prevotella gingivalis was identified in 19 subjects, Aggregatibacter actinomycetemcomitans in 6 subjects. P. intermedia was diagnosed positive in 82% of the subgingival samples taken, 79% for P. gingivalis, and 23% for A. actinomycetemcomitans. Conclusion This study shows a high frequency of putative periodontal pathogens by using DNA probe technology, which is semi-quantitative in this study. Deoxyribonucleic acid probes can detect bacteria at very low level about 103 which is below the detection level of culture methods. The detection threshold of cultural methods. Clinical significance The three types of bacteria can be detected rapidly with high sensitivity by using the DNA probe by general practitioners, and thus can help in the diagnosis process and the treatment. How to cite this article Yahfoufi ZAL, Hadchiti W, Berberi A. Deoxyribonucleic Acid Probes Analyses for the Detection of Periodontal Pathogens. J Contemp Dent Pract 2015;16(9): 727-732.

scholarly journals Ultrafast coherent excitation of an ytterbium ion with single laser pulses

2021 ◽  
Vol 119 (21) ◽  
pp. 214003
Author(s):  
Kenji Shimizu ◽  
Jordan Scarabel ◽  
Elizabeth Bridge ◽  
Steven Connell ◽  
Moji Ghadimi ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Coherent Excitation ◽  
Single Laser ◽  
Ytterbium Ion

Surface modification of polymethylmethacrylate irradiated with 60fs single laser pulses

2009 ◽  
Vol 78 (10) ◽  
pp. S71-S74 ◽  
Author(s):  
D. Klinger ◽  
R. Sobierajski ◽  
R. Nietubyć ◽  
J. Krzywiński ◽  
J. Pełka ◽  
...  
Keyword(s):  
Surface Modification ◽  
Laser Pulses ◽  
Single Laser

scholarly journals Detection of low level microwave radiation induced deoxyribonucleic acid damage vis-à-vis genotoxicity in brain of fischer rats

2013 ◽  
Vol 20 (1) ◽  
pp. 19 ◽  
Author(s):  
BasuDev Banerjee ◽  
RafatSultana Ahmed ◽  
Sudhir Chandna ◽  
MaheshPandurang Abegaonkar ◽  
AshokKumar Tripathi ◽  
...  
Keyword(s):  
Microwave Radiation ◽  
Deoxyribonucleic Acid ◽  
Low Level ◽  
Radiation Induced ◽  
Fischer Rats

scholarly journals All-optical spin switching probability in [Tb/Co] multilayers

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
L. Avilés-Félix ◽  
L. Farcis ◽  
Z. Jin ◽  
L. Álvaro-Gómez ◽  
G. Li ◽  
...  
Keyword(s):  
Optical Switching ◽  
Laser Pulses ◽  
Multilayered Structures ◽  
Magnetization Switching ◽  
Thermally Induced ◽  
Spintronic Devices ◽  
Single Laser ◽  
All Optical ◽  
Reversal Mechanism ◽  
All Optical Switching

AbstractSince the first experimental observation of all-optical switching phenomena, intensive research has been focused on finding suitable magnetic systems that can be integrated as storage elements within spintronic devices and whose magnetization can be controlled through ultra-short single laser pulses. We report here atomistic spin simulations of all-optical switching in multilayered structures alternating n monolayers of Tb and m monolayers of Co. By using a two temperature model, we numerically calculate the thermal variation of the magnetization of each sublattice as well as the magnetization dynamics of [$$\text {Tb}_n$$ Tb n /$$\text {Co}_m$$ Co m ] multilayers upon incidence of a single laser pulse. In particular, the condition to observe thermally-induced magnetization switching is investigated upon varying systematically both the composition of the sample (n,m) and the laser fluence. The samples with one monolayer of Tb as [$$\text {Tb}_1$$ Tb 1 /$$\text {Co}_2$$ Co 2 ] and [$$\text {Tb}_1$$ Tb 1 /$$\text {Co}_3$$ Co 3 ] are showing thermally induced magnetization switching above a fluence threshold. The reversal mechanism is mediated by the residual magnetization of the Tb lattice while the Co is fully demagnetized in agreement with the models developed for ferrimagnetic alloys. The switching is however not fully deterministic but the error rate can be tuned by the damping parameter. Increasing the number of monolayers the switching becomes completely stochastic. The intermixing at the Tb/Co interfaces appears to be a promising way to reduce the stochasticity. These results predict for the first time the possibility of TIMS in [Tb/Co] multilayers and suggest the occurrence of sub-picosecond magnetization reversal using single laser pulses.

Standard meter for measuring the energy of single laser pulses

1970 ◽  
Vol 13 (8) ◽  
pp. 1164-1169
Author(s):  
A. S. Obukhov ◽  
V. M. Rusov
Keyword(s):  
Laser Pulses ◽  
Single Laser
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