scholarly journals Effect of Light Irradiation Time on the Mechanical Properties of Two Flowable Composites with Different Initiation Systems in Bonded and Unbonded Cavities

2007 ◽  
Vol 26 (5) ◽  
pp. 687-693 ◽  
Author(s):  
Ma'an M. NAYIF ◽  
Masatoshi NAKAJIMA ◽  
Richard M. FOXTON ◽  
Junji TAGAMI
Keyword(s):  
Mechanical Properties ◽  
Irradiation Time ◽  
Light Irradiation ◽  
Flowable Composites ◽  
Effect Of Light

Nanotribological Investigation of Magnetic Rigid Disks Lubricated with Perfluoropolyether Lubricant Under Varying Conditions

2008 ◽  
Vol 8 (5) ◽  
pp. 2719-2723 ◽  
Author(s):  
E. Liu ◽  
K. S. Tan ◽  
H. I. Tan
Keyword(s):  
Mechanical Properties ◽  
Uv Irradiation ◽  
Uv Light ◽  
Irradiation Time ◽  
Experimental Results ◽  
Light Irradiation ◽  
Loading Conditions ◽  
Uv Treatment ◽  
Uv Light Irradiation ◽  
Rigid Disks

This paper studies the nanotribological behavior of magnetic rigid disks dip-coated with ultra thin perfluoropolyether (PFPE) Z-Dol 4000 lubricant layers up to 4 nm thick prior to or after exposure to ultraviolet (UV) light irradiation. Lube bonding ratios (LBRs) of 43–91% were achieved by varying the UV irradiation time. The nanotribological and mechanical properties of the disks were measured with a nanotribometer under varying loading conditions. The effect of the LBR on the nanotribological behavior of the disks was also elucidated. We found that the lubricated disks after UV treatment performed better compared to the lubricated disks without UV treatment. The experimental results indicated that the LBR of about 50% could achieve the best contact-start–stop and flyability performances.

The effect of light irradiation on the growth of C60–C70 nanofibers

RSC Advances ◽  
2015 ◽  
Vol 5 (30) ◽  
pp. 23391-23394 ◽  
Author(s):  
Xin Zhao ◽  
Bingzhe Wang ◽  
Wenwen Yu ◽  
Xin Gao ◽  
Guangzhe Piao
Keyword(s):  
Charge Transfer ◽  
Light Irradiation ◽  
Transfer Reactions ◽  
Charge Transfer Reactions ◽  
Effect Of Light

Charge transfer reactions between C60, C70 and pyridine.

scholarly journals Effect of light intensity and irradiation time on the polymerization process of a dental composite resin

2004 ◽  
Vol 7 (2) ◽  
pp. 313-318 ◽  
Author(s):  
José Augusto César Discacciati ◽  
Alisson Discacciati Neves ◽  
Rodrigo Lambert Oréfice ◽  
Flávio Juliano Garcia Santos Pimenta ◽  
Herbert Haueisen Sander
Keyword(s):  
Light Intensity ◽  
Composite Resin ◽  
Irradiation Time ◽  
Dental Composite ◽  
Polymerization Process ◽  
Dental Composite Resin ◽  
Effect Of Light

scholarly journals Influence of shade and irradiation time on the hardness of composite resins

2007 ◽  
Vol 18 (3) ◽  
pp. 231-234 ◽  
Author(s):  
Álvaro Della Bona ◽  
Vinícius Rosa ◽  
Dileta Cecchetti
Keyword(s):  
Composite Resin ◽  
Irradiation Time ◽  
Composite Resins ◽  
Light Irradiation ◽  
Hardness Tester ◽  
Different Depths ◽  
Study Hypothesis ◽  
Dark Shade

This study tested the following hypotheses: 1. increasing light irradiation time (IT) produces greater values of superficial hardness on different depths (0 and 3 mm); and 2. a dark shade composite (A3) needs longer IT than a light shade composite (A1) to produce similar hardness. Disk-shaped specimens (n=24 per shade) were fabricated using a 3-mm-thick increment of composite resin (Z100). Specimens were randomly assigned to 3 groups (n=8) according to the IT (400 mW/cm2) at the upper (U) surface: A1-10 and A3-10: 10 s; A1-20 and A3-20: 20 s; A1-40 and A3-40: 40 s. Specimens were stored in black lightproof containers at 37ºC for 24 h before indentation in a hardness tester. Three Vickers indentations were performed on the U and lower (L) surfaces of each specimen. The indent diagonals were measured and the hardness value calculated. The results were analyzed statistically by ANOVA and Tukey's test (alpha=0.05). Statistically significant differences were found between U and L surfaces of each composite shade-IT combination (p=0.0001) and among the ITs of same shade-surface combination (p=0.0001), except between groups A1-20U and A1-40U, confirming the study hypothesis 1 and partially rejecting the hypothesis 2.

scholarly journals Effect of Light Irradiation on Wound Healing due to Characteristics of Polarization of Light

1987 ◽  
Vol 7 (3) ◽  
pp. 69-70
Author(s):  
Yoshio Taguchi ◽  
Yoshimochi Kurokawa ◽  
Itaru Ohara ◽  
Shu-ichi Sato ◽  
Norihiko Mikoshiba ◽  
...  
Keyword(s):  
Wound Healing ◽  
Light Irradiation ◽  
Polarization Of Light ◽  
Effect Of Light

Effect of Light Irradiation on the Crystal Structure and Conductivity of Reduced YBa2Cu3O7−y

1995 ◽  
pp. 141-144 ◽  
Author(s):  
Hidetoshi Minami ◽  
Mikio Ishibashi ◽  
Ken-ichi Ohshima ◽  
Hiromoto Uwe
Keyword(s):  
Crystal Structure ◽  
Light Irradiation ◽  
Effect Of Light
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