Normal and regenerating optic fibers in goldfish tectum: HRP-EM Evidence for rapid synaptogenesis and optic fiber-fiber affinity

1988 ◽  
Vol 274 (4) ◽  
pp. 516-538 ◽  
Author(s):  
William P�r Hayes ◽  
Ronald L. Meyer
Keyword(s):  
Optic Fiber ◽  
Optic Fibers

Design and Performance of a Microfluidic Particle Sorting Device

2011 ◽  
Vol 52-54 ◽  
pp. 668-673
Author(s):  
Jun Yang ◽  
Jing Yang ◽  
Qing He You ◽  
Ning Hu ◽  
Yong Li ◽  
...  
Keyword(s):  
Incident Light ◽  
Microfluidic System ◽  
Optic Fiber ◽  
Detection Zone ◽  
Severe Injuries ◽  
Electric Voltage ◽  
Particle Sorting ◽  
Electric Deflection ◽  
Optic Fibers ◽  
And Performance

A microfluidic chip device was developed for rapid and automatic particle sorting. The chip was made up of six individual layers. Each layer was used to implement different functions such as the sample loading, electric voltage loading, optic detection, cell sorting, and product extraction. Sheath flow was used to form single-row cells in order to let cells flow through the optic detection zone one by one. Optic fiber based detector could distinguish particles with different sizes. When a particle flowed through the light beam between two opposite optic fibers, it induced the dispersion of the incident light. The size of the particle was related with the strength of the scattering light. Thus, different particles could be distinguished. In the detection method, light path was simple and label was not required. Furthermore, optic fiber based detector was helpful to decrease the volume of the whole system. When desired particle was detected, it would be separated in the downstream by using an electric deflection method. Two types of particles with different sizes were sorted by using a prototype device. The result showed that these particles could be obviously distinguished. This microfluidic system could also be used to sort biological cells. Instantaneous electric field on the cells could prevent cells from severe injuries.

Research on Optic Fiber Coatings and Curing Process Monitoring of Composites Based on FBG

2011 ◽  
Vol 189-193 ◽  
pp. 1184-1187 ◽  
Author(s):  
Jiu Xiao Sun ◽  
Yun Dong Ji ◽  
Yan Zi Yin ◽  
Ji Hui Wang
Keyword(s):  
Room Temperature ◽  
Optical Microscope ◽  
Bending Test ◽  
Stress And Strain ◽  
Optic Fiber ◽  
Curing Process ◽  
Optic Fibers ◽  
Relationship Of ◽  
The Relationship ◽  
Fiber Coatings

In this paper, effect of FBG coating in curing monitoring of composites was studied. In the experiment, three kinds of sensors were embedded in the composites. Excursion of the wavelength and temperature was tested in the whole curing process. 3-point bending test of composites which FBG was embedded in was done. Results showed that FBG could be exactly reflecting the relationship of stress and strain in bending state of composites. After cured, composites were heat up to 180°C for 1 hour. Sectional appearance of different optic fibers in room temperature and high temperature was got by optical microscope.

scholarly journals Investigation of the Shear Bond Strength of Orthodontic Buttons by Light Curing Using an Extended Optic Fiber

2021 ◽  
Vol 48 (1) ◽  
pp. 105-114
Author(s):  
Garam Yoon ◽  
Nanyoung Lee ◽  
Sangho Lee ◽  
Myeongkwan Jih ◽  
Wonseok Choi ◽  
...  
Keyword(s):  
Bond Strength ◽  
Shear Bond Strength ◽  
Fiber Diameter ◽  
Statistical Significance ◽  
Large Diameter ◽  
Optic Fiber ◽  
Group Iii ◽  
Group I ◽  
Curing Light ◽  
Optic Fibers

The objective of this study is to analyze the shear bond strength of orthodontic buttons according to light tip distance and optic fiber diameter when an extended optic fiber was applied to the tip of a curing light unit.In this study, 315 extracted premolar teeth were divided into 3 groups. Orthodontic buttons were attached using no optic fibers (Group I), 3.0 mm diameter optic fibers (Group II), or 5.0 mm diameter optic fibers (Group III). Each group was divided into subgroups A - C (5.0, 10.0, and 15.0 mm light tip distance), respectively. Shear bond strength was then measured while varying the light tip distance.In group I, shear bond strength significantly decreased as the light tip distance increased. When the shear bond strength was evaluated according to the optic fiber diameter, no statistical significance was observed in group of 5.0 mm light tip distance. Compared with group IB, group IIIB showed significantly greater shear bond strength. Compared with group IC, all groups using 3.0 or 5.0 mm diameter optic fibers showed significantly greater shear bond strength.Therefore, when a curing light unit has poor accessibility, optic fibers with a large diameter should be considered.

Application of Optic Fiber Guide CO2 Laser.

1991 ◽  
Vol 84 (8) ◽  
pp. 1147-1151
Author(s):  
Tomio Terazono ◽  
Wataru Oshima ◽  
Shinya Kihira ◽  
Miho Nakao ◽  
Eisuke Takegami ◽  
...  
Keyword(s):  
Co2 Laser ◽  
Optic Fiber

N-cholinergic facilitation of glutamate release from an individual retinotectal fiber in frog

2001 ◽  
Vol 18 (4) ◽  
pp. 549-558 ◽  
Author(s):  
A. KURAS ◽  
N. GUTMANIENĖ
Keyword(s):  
Nicotinic Acetylcholine Receptors ◽  
Action Potentials ◽  
Acetylcholine Receptors ◽  
Kynurenic Acid ◽  
Glutamate Release ◽  
Synaptic Potentials ◽  
Lower Vertebrates ◽  
Optic Fibers ◽  
Retinotectal Transmission

Nicotinic acetylcholine receptors are localized on retinotectal axons' terminals in lower vertebrates. The effects of activation of these receptors by endogenous acetylcholine were observed under stimulation of mass optic fibers. This study was designed to determine whether endogenous acetylcholine facilitates frog retinotectal transmission, provided only the synapses of an individual optic axon are activated, and to evaluate the feasible extent of nicotinic facilitation in these synapses by applied agonist. To this end, the effects of cholinergic drugs on the extracellular action and synaptic potentials recorded from the terminal arborization of a separate retinotectal fiber (in layer F of the tectum) were investigated in vivo. Glutamatergic nature of retinotectal synapses was reexamined by treatment with kynurenic acid. Both kynurenic acid (0.25–1 mM) and d-tubocurarine chloride (10–15 μM) significantly depressed the synaptic potentials. Carbamylcholine chloride (50–150 μM) evoked a large augmentation of the synaptic potentials and a slight but statistically significant decrease of the action potentials. D-tubocurarine reduced the effect of carbamylcholine. Pilocarpine hydrochloride (50 μM) had only a weak effect. The paired-pulse facilitation of the synaptic potentials changed significantly under the action of carbamylcholine and d-tubocurarine. The obtained results suggest that the glutamate release from activated synapses of individual retinotectal axons is facilitated by endogenous acetylcholine via presynaptic nicotinic receptors. Under used stimulation conditions, this modulation mechanism was employed only partially since its activation by applied carbamylcholine could enhance synaptic transmission up to 2.8 times.

Optic-fiber sensor for steam quality measurement

2005 ◽  
Author(s):  
Pei Liang ◽  
Jianjun Yu ◽  
Guirong Zu ◽  
Xinjiang Li ◽  
Yang Shen ◽  
...  
Keyword(s):  
Quality Measurement ◽  
Fiber Sensor ◽  
Optic Fiber ◽  
Steam Quality

scholarly journals All fiber polarimetric modulation using an electro-optic fiber with internal Pb-Sn electrodes

2006 ◽  
Vol 14 (23) ◽  
pp. 11234 ◽  
Author(s):  
Bok Hyeon Kim ◽  
Songbae Moon ◽  
Un-Chul Paek ◽  
Won-Taek Han
Keyword(s):  
Optic Fiber ◽  
Electro Optic
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