scholarly journals Applying limiting entropy to quantify the alignment of collagen fibers by polarized light imaging

2021 ◽  
Vol 18 (3) ◽  
pp. 2331-2356
Author(s):  
Yingjie Qu ◽  
◽  
Zachary J. Smith ◽  
Kelly Tyler ◽  
Shufang Chang ◽  
...  
Keyword(s):  
Polarized Light ◽  
Collagen Fibers ◽  
Polarized Light Imaging

scholarly journals Kinetochore-driven outgrowth of microtubules is a central contributor to kinetochore fiber maturation in crane-fly spermatocytes

2014 ◽  
Vol 25 (9) ◽  
pp. 1437-1445 ◽  
Author(s):  
James R. LaFountain ◽  
Rudolf Oldenbourg
Keyword(s):  
Liquid Crystal ◽  
Life Histories ◽  
Polarized Light ◽  
Fiber Formation ◽  
Image Brightness ◽  
Early Stages ◽  
Anaphase Onset ◽  
Bipolar Spindles ◽  
Polarized Light Imaging

We use liquid crystal polarized light imaging to record the life histories of single kinetochore (K-) fibers in living crane-fly spermatocytes, from their origins as nascent K-fibers in early prometaphase to their fully matured form at metaphase, just before anaphase onset. Increased image brightness due to increased retardance reveals where microtubules are added during K-fiber formation. Analysis of experimentally generated bipolar spindles with only one centrosome, as well as of regular, bicentrosomal spindles, reveals that microtubule addition occurs at the kinetochore-proximal ends of K-fibers, and added polymer expands poleward, giving rise to the robust K-fibers of metaphase cells. These results are not compatible with a model for K-fiber formation in which microtubules are added to nascent fibers solely by repetitive “search and capture” of centrosomal microtubule plus ends. Our interpretation is that capture of centrosomal microtubules—when deployed—is limited to early stages in establishment of nascent K-fibers, which then mature through kinetochore-driven outgrowth. When kinetochore capture of centrosomal microtubules is not used, the polar ends of K-fibers grow outward from their kinetochores and usually converge to make a centrosome-free pole.

Quantitative comparison of human myocardial fiber orientations derived from DTI and polarized light imaging

2018 ◽  
Vol 63 (21) ◽  
pp. 215003 ◽  
Author(s):  
Feng Yang ◽  
Yue-Min Zhu ◽  
Gabrielle Michalowicz ◽  
Pierre-Simon Jouk ◽  
Laurent Fanton ◽  
...  
Keyword(s):  
Polarized Light ◽  
Quantitative Comparison ◽  
Myocardial Fiber ◽  
Polarized Light Imaging

scholarly journals Human non-decalcified histology of three dental implants 45 months under function—a case report

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Rafael Silveira Faeda ◽  
Suzana Clesia Silverio do Nascimento ◽  
Pâmela Leticia Santos ◽  
Rodolfo Jorge Boeck ◽  
Rafael Sartori ◽  
...  
Keyword(s):  
Case Report ◽  
Bone Tissue ◽  
Rare Event ◽  
Polarized Light ◽  
Collagen Fibers ◽  
Titanium Implants ◽  
Tissue Response ◽  
Internal Diameter ◽  
Human Beings ◽  
Circularly Polarized Light

Abstract Background Fracture of an implant is a quite rare event but represents an important opportunity to evaluate the peri-implant bone tissue response to implant overload in human beings. This study aimed to evaluate bone tissue around three fractured titanium implants retrieved from a human maxilla, by histomorphometric and birefringence analyses. Case report For this, the implants and the surrounding bone were removed after having been united to a tooth in function for 45 months, by a 4-mm internal diameter trephine bur, following an undecalcified section was obtained. The results showed a rate of 77.3% of bone-to-implant contact (BIC) and 80.3% of bone area filling within the limits of the implant threads. Under circularly polarized light microscopy investigation, the amount of the transverse collagen fibers was of 48.11%, and the amount of the longitudinal collagen fibers was of 51.89%. Conclusion Within the limitation of this study, the possible cause of the implant fracture could be the association of overload, inadequate implant diameter, and fragile internal hexagon connection.

Grazing incidence polarized light imaging of footwear prints

2019 ◽  
Vol 20 (11) ◽  
pp. 1543-1550
Author(s):  
Xin-yi Bi ◽  
Rui-fang Han ◽  
Ran Liao ◽  
Wu-sheng Feng ◽  
Da Li ◽  
...  
Keyword(s):  
Polarized Light ◽  
Grazing Incidence ◽  
Polarized Light Imaging

scholarly journals Evaluation of collimated polarized light imaging for real-time intraoperative selective nerve identification in the human hand

2017 ◽  
Vol 8 (9) ◽  
pp. 4122 ◽  
Author(s):  
K. W. T. K Chin ◽  
A. F. Engelsman ◽  
P. T. K. Chin ◽  
S. L. Meijer ◽  
S. D. Strackee ◽  
...  
Keyword(s):  
Real Time ◽  
Polarized Light ◽  
Human Hand ◽  
Nerve Identification ◽  
Polarized Light Imaging

Polarized light imaging of object hidden in scattering media: model experiments

2001 ◽  
Author(s):  
Yurii P. Sinichkin ◽  
Dmitry A. Zimnyakov ◽  
Vadim V. Giterman
Keyword(s):  
Polarized Light ◽  
Scattering Media ◽  
Model Experiments ◽  
Polarized Light Imaging
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