vHARMONICITY OF -HOLOMORPHIC SECTIONS OF A (RIEMANNIAN) ALMOST CONTACT FIBER BUNDLE OF TYPE I

2019 ◽  
Vol 121 (2) ◽  
pp. 169-197
Author(s):  
Aristide Ayibe
Keyword(s):  
Fiber Bundle ◽  
Type I ◽  
Holomorphic Sections

scholarly journals Number of fiber bundles in the fetal anterior talofibular ligament

2021 ◽  
Author(s):  
Mutsuaki Edama ◽  
Tomoya Takabayashi ◽  
Hirotake Yokota ◽  
Ryo Hirabayashi ◽  
Chie Sekine ◽  
...  
Keyword(s):  
Fiber Bundle ◽  
Fiber Bundles ◽  
Anterior Talofibular Ligament ◽  
Type I ◽  
Type Ii ◽  
Crown Rump Length ◽  
Type Iii ◽  
The Difference ◽  
And Inversion

Abstract Background For the anterior talofibular ligament (ATFL), a three-fiber bundle has recently been suggested to be weaker than a single or double fiber bundle in terms of ankle plantarflexion and inversion braking function. However, the studies leading to those results all used elderly specimens. Whether the difference in fiber bundles is a congenital or an acquired morphology is important when considering methods to prevent ATFL damage. The purpose of this study was to classify the number of fiber bundles in the ATFL of fetuses. Methods This study was conducted using 30 legs from 15 Japanese fetuses (mean weight, 1764.6 ± 616.9 g; mean crown-rump length, 283.5 ± 38.7 mm; 8 males, 7 females). The ATFL was then classified by the number of fiber bundles: Type I, one fiber bundle; Type II, two fiber bundles; and Type III, three fiber bundles. Results Ligament type was Type I in 5 legs (16.7%), Type II in 21 legs (70%), and Type III in 4 legs (13.3%). Conclusions The present results suggest that the three fiber bundles of the structure of the ATFL may be an innate structure.

scholarly journals Second harmonic generation light quantifies the ratio of type III to total (I + III) collagen in a bundle of collagen fiber

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shukei Sugita ◽  
Takuya Suzumura ◽  
Akinobu Nakamura ◽  
Shinya Tsukiji ◽  
Yoshihiro Ujihara ◽  
...  
Keyword(s):  
Light Intensity ◽  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Fiber Bundle ◽  
Collagen Fiber ◽  
Type I Collagen ◽  
Second Harmonic ◽  
Type I ◽  
Type Iii ◽  
The Relationship

AbstractThe ratio of type III to type I collagen is important for properly maintaining functions of organs and cells. We propose a method to quantify the ratio of type III to total (type I + III) collagen (λIII) in a given collagen fiber bundle using second harmonic generation (SHG) light. First, the relationship between SHG light intensity and the λIII of collagen gels was examined, and the slope (k1) and SHG light intensity at 0% type III collagen (k2) were determined. Second, the SHG light intensity of a 100% type I collagen fiber bundle and its diameter (D) were measured, and the slope (k3) of the relationship was determined. The λIII in a collagen fiber bundle was estimated from these constants (k1-3) and SHG light intensity. We applied this method to collagen fiber bundles isolated from the media and adventitia of porcine thoracic aortas, and obtained λIII = 84.7% ± 13.8% and λIII = 17.5% ± 15.2%, respectively. These values concurred with those obtained with a typical quantification method using sodium dodecyl sulfate–polyacrylamide gel electrophoresis. The findings demonstrated that the method proposed is useful to quantify the ratio of type III to total collagen in a collagen fiber bundle.

scholarly journals Morphological characteristics of the plantar calcaneocuboid ligaments

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Mutsuaki Edama ◽  
Tomoya Takabayashi ◽  
Hirotake Yokota ◽  
Ryo Hrabayashi ◽  
Chie Sekine ◽  
...  
Keyword(s):  
Fiber Bundle ◽  
Morphological Characteristics ◽  
Common Type ◽  
Morphological Features ◽  
Fiber Bundles ◽  
Type I ◽  
Functional Difference ◽  
Type Ii ◽  
Functional Differences ◽  
The Difference

Abstract Background The aim of this study was to clarify the differences in morphological features between the long plantar ligament (LPL) and the short plantar ligament (SPL). Methods This investigation examined 50 legs from 25 Japanese cadavers. The LPL and SPL of each leg were classified into one of three types based on the shape and number of fiber bundles. Then, fiber bundle length, fiber bundle width, and fiber bundle thickness were measured. Results The LPL was rectangular in shape (Type I) in 12%, hourglass shape (Type II) in 62%, and triangular in shape (Type III) in 26%. The SPL was a single fiber bundle (Type I-a) in 26%, a surface fiber bundle and a deep fiber bundle (Type I-b) in 60%, and a surface fiber bundle (medial and lateral) and a deep fiber bundle (Type II) in 14%. Regarding the morphological characteristics, there were no significant differences among the types in the LPL, but there were differences between types and between surface and deep fiber bundles in the SPL. Conclusions For the LPL, the hourglass shape is the most common type. However, there appeared to be no functional difference due to the difference in the shape of the LPL, since there were no significant differences among the types in the LPL. For the SPL, there were types of single, double and triple fiber bundles; there may be functional differences based on the number of fiber bundles and between superficial and deep fibers.

scholarly journals Harmonicity of $(\varphi,\varphi^{\prime})$-holomorphic sections of a (semi-riemannian) almost paracontact fiber bundle of type II

2021 ◽  
Vol 9 (1) ◽  
pp. 1-22
Author(s):  
Aristide Ayibe
Keyword(s):  
Fiber Bundle ◽  
Fiber Bundles ◽  
Type Ii ◽  
Holomorphic Maps ◽  
Holomorphic Sections

In this paper (ϕ, ϕ0 )-holomorphic maps from an almost paraHermitian manifold to an almost paracontact metric manifold are studied and a criterion for the harmonicity of such (ϕ, ϕ0 )-holomorphic maps is obtained. Also (ϕ, ϕ0 )-holomorphic sections of (semi−Riemannian) almost paracontact fiber bundles of type II are studied and a criterion for the harmonicity of such (ϕ, ϕ0 )-holomorphic sections is obtained.

scholarly journals Morphological Characteristics of the Plantar Calcaneocuboid Ligaments

2020 ◽  
Author(s):  
Mutsuaki Edama ◽  
Tomoya Takabayashi ◽  
Hirotake Yokota ◽  
Ryo Hirabayashi ◽  
Chie Sekine ◽  
...  
Keyword(s):  
Fiber Bundle ◽  
Morphological Characteristics ◽  
Common Type ◽  
Morphological Features ◽  
Fiber Bundles ◽  
Type I ◽  
Functional Difference ◽  
Type Ii ◽  
Functional Differences ◽  
The Difference

Abstract Background: The aim of this study was to clarify the differences in morphological features based on differences in the shape and number of the long plantar ligament (LPL) and the short plantar ligament (SPL).Methods: This investigation examined 50 legs from 25 Japanese cadavers. The LPL and SPL of each leg were classified into one of three types based on the shape and number of fiber bundles. Then, fiber bundle length, fiber bundle width, and fiber bundle thickness were measured.Results: The LPL was rectangular in shape (Type I) in 12%, hourglass shape (Type II) in 62%, and triangular in shape (Type III) in 26%. The SPL was a single fiber bundle (Type I-a) in 26%, a surface fiber bundle and a deep fiber bundle (Type I-b) in 60%, and a surface fiber bundle (medial and lateral) and a deep fiber bundle (Type II) in 14%. Regarding the morphological characteristics, there were no significant differences among the types in the LPL, but there were differences between types and between surface and deep fiber bundles in the SPL.Conclusions: For the LPL, the hourglass shape is the most common type. However, there appeared to be no functional difference due to the difference in the shape of the LPL, since there were no significant differences among the types in the LPL. For the SPL, there were types of single, double and triple fiber bundles; there may be functional differences based on the number of fiber bundles and between superficial and deep fibers.

scholarly journals Morphological characteristics of the Lisfranc ligament

2020 ◽  
Author(s):  
Suzuki Yukako ◽  
Mutsuaki Edama ◽  
Kaneko Fmiya ◽  
Ikezu Masahiro ◽  
Matuszawa Kanta ◽  
...  
Keyword(s):  
Fiber Bundle ◽  
Morphological Characteristics ◽  
Single Fiber ◽  
Fiber Bundles ◽  
Type I ◽  
Type Ii ◽  
Type Iii ◽  
Type Iv ◽  
Lisfranc Ligament ◽  
Length Width

Abstract Background This study aimed to clarify the morphological characteristics of the Lisfranc ligament and the plantar ligament. Methods Forty legs from 20 cadavers were examined. Classification proceeded according to the number of fiber bundles in the Lisfranc ligament and the plantar ligament. Morphological features measured were fiber bundle length, width, thickness, and angle. Results In Type I-a, the Lisfranc and plantar ligaments were a single fiber bundle; in Type I-b, the Lisfranc ligament was a single fiber bundle, and the plantar ligament was two fiber bundles; in Type II-a, the Lisfranc ligament was a two fiber bundle, and the plantar ligament was a single fiber bundle; in Type II-b, the Lisfranc ligament and the plantar ligament were two fiber bundles; in Type III-a, the Lisfranc ligament was three fiber bundles, and the plantar ligament was a single fiber bundle; in Type III-b, the Lisfranc ligament was three fiber bundles, and the plantar ligament was two fiber bundles; in Type IV, the Lisfranc ligament and the plantar ligament could not be separated. Type I-a was seen in 37.5%, Type I-b in 10%, Type II-a in 30%, Type II-b in 7.5%, Type III-a in 7.5%, Type III-b in 2.5%, and Type IV in 5%. The Lisfranc ligament was significantly larger than the plantar ligament in total fiber bundle width, total fiber bundle thickness, and total fiber bundle angle. Conclusion The Lisfranc ligament had three fiber bundles, and the plantar ligament had two fiber bundles; classifications were four types and two subgroups.

scholarly journals Harmonicity of $(\varphi,\varphi^{\prime})$-holomorphic sections of a (semi-riemannian) almost paracontact fiber bundle of type II

2021 ◽  
Vol 9 (1) ◽  
pp. 1-22
Author(s):  
Aristide Ayibe
Keyword(s):  
Fiber Bundle ◽  
Fiber Bundles ◽  
Type Ii ◽  
Holomorphic Maps ◽  
Holomorphic Sections

In this paper (ϕ, ϕ0 )-holomorphic maps from an almost paraHermitian manifold to an almost paracontact metric manifold are studied and a criterion for the harmonicity of such (ϕ, ϕ0 )-holomorphic maps is obtained. Also (ϕ, ϕ0 )-holomorphic sections of (semi−Riemannian) almost paracontact fiber bundles of type II are studied and a criterion for the harmonicity of such (ϕ, ϕ0 )-holomorphic sections is obtained.

Heat-Etching with a Bullivant Type II Simple Freeze-Cleave Device

1970 ◽  
Vol 28 ◽  
pp. 106-107 ◽  
Author(s):  
Ronald S. Weinstein ◽  
N. Scott McNutt
Keyword(s):  
New Zealand ◽  
General Hospital ◽  
Massachusetts General Hospital ◽  
Type I ◽  
Type Ii ◽  
Collaborative Effort ◽  
Temperature And Pressure ◽  
The University

The Type I simple cold block device was described by Bullivant and Ames in 1966 and represented the product of the first successful effort to simplify the equipment required to do sophisticated freeze-cleave techniques. Bullivant, Weinstein and Someda described the Type II device which is a modification of the Type I device and was developed as a collaborative effort at the Massachusetts General Hospital and the University of Auckland, New Zealand. The modifications reduced specimen contamination and provided controlled specimen warming for heat-etching of fracture faces. We have now tested the Mass. General Hospital version of the Type II device (called the “Type II-MGH device”) on a wide variety of biological specimens and have established temperature and pressure curves for routine heat-etching with the device.

Two Distinct Types of Microfilaments in the Cytoplasm of Human Adenohypophysial Cells

1973 ◽  
Vol 31 ◽  
pp. 668-669
Author(s):  
E. Horvath ◽  
K. Kovacs ◽  
I. E. Stratmann ◽  
C. Ezrin
Keyword(s):  
Pituitary Tumors ◽  
Average Diameter ◽  
Anterior Lobe ◽  
Uranyl Acetate ◽  
Type I ◽  
Breast Cancer Patients ◽  
Human Pituitary ◽  
Severe Diabetes ◽  
Pituitary Glands ◽  
Membrane Bound

Surgically removed human pituitary glands as well as pituitary tumors fixed in glutaraldehyde, postfixed in osmium tetroxide, embedded in epon resin, stained with uranyl acetate and lead citrate have been investigated by electron microscopy in order to correlate ultrastructure with functional activity. In the course of this study two distinct types of microfilaments have been identified in the cytoplasm of adenohypophysiocytes.Type I microfilaments (Fig. 1) were found in the cytoplasm of anterior lobe cells of five female subjects with disseminated mammary cancer and two patients with severe diabetes mellitus. The breast cancer patients were treated pre-operatively for various periods of time with different doses of oxysteroids. The microfilaments had an average diameter of JO A, formed parallel bundles, were scattered irregularly in the cytoplasm and were frequently located in the perikaryon. They were not membrane-bound and failed to show any periodicity.

The diagnosis of metabolic storage disease in skin biopsies (a light-, electronmicroscopic, and analytical study)

1978 ◽  
Vol 36 (2) ◽  
pp. 648-649
Author(s):  
W. Jurecka ◽  
W. Gebhart ◽  
H. Lassmann
Keyword(s):  
Storage Disease ◽  
Hunter Syndrome ◽  
Histochemical Demonstration ◽  
Sweat Glands ◽  
Type I ◽  
Storage Material ◽  
Scheie Syndrome ◽  
Storage Products ◽  
Skin Biopsies ◽  
Type V

Diagnosis of metabolic storage disease can be established by the determination of enzymes or storage material in blood, urine, or several tissues or by clinical parameters. Identification of the accumulated storage products is possible by biochemical analysis of isolated material, by histochemical demonstration in sections, or by ultrastructural demonstration of typical inclusion bodies. In order to determine the significance of such inclusions in human skin biopsies several types of metabolic storage disease were investigated. The following results were obtained.In MPS type I (Pfaundler-Hurler-Syndrome), type II (Hunter-Syndrome), and type V (Ullrich-Scheie-Syndrome) mainly “empty” vacuoles were found in skin fibroblasts, in Schwann cells, keratinocytes and macrophages (Dorfmann and Matalon 1972). In addition, prominent vacuolisation was found in eccrine sweat glands. The storage material could be preserved in part by fixation with cetylpyridiniumchloride and was also present within fibroblasts grown in tissue culture.

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