scholarly journals Ultrastructure of telocytes, a new type of interstitial cells in the myocardium of the Chinese giant salamander (Andrias davidianus)

2019 ◽  
Vol 63 (2) ◽  
Author(s):  
Tingting Ge ◽  
Yaqiong Ye ◽  
Hui Zhang
Keyword(s):  
Electron Microscopy ◽  
Tissue Regeneration ◽  
Structural Characteristics ◽  
Interstitial Cells ◽  
Andrias Davidianus ◽  
Transmission Electron ◽  
Close Proximity ◽  
Chinese Giant Salamander ◽  
New Type ◽  
Ultrastructural Characteristics

Telocytes (TCs) are new interstitial cells, and they are involved in tissue regeneration, particularly in heart. Therefore, TCs are suggested to be a promising cell in regenerative medicine. However, the information of location structural characteristics and functions of TCs is still limited. In this study, cardiac TCs of the Chinese giant salamanders (Andrias davidianus) were identified by transmission electron microscopy. TCs were located in the interstitium between cardiomyocytes (CM). TCs possessed distinctive ultrastructural characteristics, including one to two very long and thin moniliform telopodes (Tps), emerging points from the cell body, caveolae, dichotomous branchings, labyrinthic systems, neighbouring exosomes and homo-cellular contacts between Tps. TCs/Tps were frequently observed in close proximity to cardiomyocytes. Moreover, Tps established hetero-cellular contacts with cardiomyocytes. Our results confirm the presence of TCs in the myocardium of the A. davidianus. This will help us to better understand roles of TCs in amphibian hearts.

A High Resolution Study of G.P. Zones in Aluminum - 4.2 at % Silver

1982 ◽  
Vol 40 ◽  
pp. 722-723 ◽  
Author(s):  
R. Gronsky
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
High Resolution ◽  
Computer Simulations ◽  
Structural Characteristics ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Resolution Study

The phenomenon of clustering in Al-Ag alloys has been extensively studied since the early work of Guinierl, wherein the pre-precipitation state was characterized as an assembly of spherical, ordered, silver-rich G.P. zones. Subsequent x-ray and TEM investigations yielded results in general agreement with this model. However, serious discrepancies were later revealed by the detailed x-ray diffraction - based computer simulations of Gragg and Cohen, i.e., the silver-rich clusters were instead octahedral in shape and fully disordered, atleast below 170°C. The object of the present investigation is to examine directly the structural characteristics of G.P. zones in Al-Ag by high resolution transmission electron microscopy.

Morphological analysis of interstitial cells in murine epididymis using light microscopy and transmission electron microscopy

2021 ◽  
Vol 123 (6) ◽  
pp. 151761
Author(s):  
Tasuku Hiroshige ◽  
Kei-Ichiro Uemura ◽  
Shingo Hirashima ◽  
Kiyosato Hino ◽  
Akinobu Togo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Light Microscopy ◽  
Morphological Analysis ◽  
Interstitial Cells ◽  
Transmission Electron

Lattice Defects in Epitaxial Ba2Bi4Ti5O18 Thin Films Grown by Pulsed Laser Deposition Onto LaNiO3 Bottom Electrodes

2000 ◽  
Vol 623 ◽  
Author(s):  
N.D. Zakharov ◽  
A.R. James ◽  
A. Pignolet ◽  
S. Senz ◽  
D. Hesse
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Cross Section ◽  
Pulsed Laser ◽  
Laser Deposition ◽  
Stacking Sequence ◽  
Rectangular Shape ◽  
Transmission Electron ◽  
Single Well ◽  
New Type

AbstractEpitaxial, ferroelectric Ba2Bi4Ti5O18 films grown on LaNiO3/CeO2/ZrO2:Y2O3 epitaxial layers on Si(100) are investigated by cross-section high-resolution transmission electron microscopy (HRTEM). The films are perfectly oriented and consist of well-developed grains of rectangular shape. The grain boundaries are strained and contain many defects, especially a new type of defect, which can be described as a staircase formed by repeated lattice shifts of Δ ∼ c/12 ∼ 4.2 Å in the [001] direction. This repeated shift results in seemingly bent ribbons of stacked Bi2O2 planes, involving, however, individual Bi2O2 planes which remain strongly parallel to the (001) plane. These defects contain an excess of bismuth. Other defects found in the grain interior include mistakes in the stacking sequence originating from the presence of single, well-oriented, non-stoichionietric layers intergrown with the stoichiometric Ba2Bi4Ti5O18 film matrix.

scholarly journals Perovskite CsPbBr3 Quantum Dots Prepared Using Discarded Lead–Acid Battery Recycled Waste

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1117 ◽  
Author(s):  
Lung-Chien Chen ◽  
Ching-Ho Tien ◽  
Sin-Liang Ou ◽  
Kun-Yi Lee ◽  
Jianjun Tian ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Structural Characteristics ◽  
Film Surface ◽  
X Ray Diffraction ◽  
Transmission Electron ◽  
Storage Batteries ◽  
Recycled Waste ◽  
Cspbbr3 Quantum Dots ◽  
Very High ◽  
Lead Acid

Perovskite CsPbBr3 quantum dot (CsPbBr3-QD) recovery was performed using lead scrap from lead storage batteries. The perovskite CsPbBr3-QD characteristics were analyzed using different PbO/recycled PbO2 ratios. Scanning electron microscopy (SEM) was used to observe the film surface morphology and cross-section. High-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) were used to observe the perovskite CsPbBr3-QDs’ structural characteristics. A photoluminescence (PL) measurement system was used to analyze the optical properties. The results show that lead scrap from lead–acid batteries as a material for perovskite CsPbBr3-QD production can be successfully synthesized. This saves material and also proves that recycling is valuable. The proposed approach is helpful for future material shortages and materials not easily accessible. Although the efficiency is not very high, this process will be purified using recycled lead in the future to achieve higher quantum yield.

scholarly journals Heterogeneous vesicles in mucous epithelial cells of posterior esophagus of Chinese giant salamander (Andrias davidianus)

2015 ◽  
Vol 59 (3) ◽  
Author(s):  
H. Zhang ◽  
X. Guo ◽  
S. Zhong ◽  
T. Ge ◽  
S. Peng ◽  
...  
Keyword(s):  
Mucous Cell ◽  
Single Layer ◽  
Esophageal Mucosa ◽  
Mucous Cells ◽  
Esophageal Epithelium ◽  
Andrias Davidianus ◽  
Transmission Electron ◽  
Chinese Giant Salamander ◽  
Columnar Cells ◽  
Dense Vesicles

The Chinese giant salamander belongs to an old lineage of salamanders and endangered species. Many studies of breeding and disease regarding this amphibian had been implemented. However, the studies on the ultrastructure of this amphibian are rare. In this work, we provide a histological and ultrastructural investigation on posterior esophagus of Chinese giant salamander. The sections of amphibian esophagus were stained by hematoxylin & eosin (H&E). Moreover, the esophageal epithelium was observed by transmission electron microscopy (TEM). The results showed that esophageal epithelium was a single layer epithelium, which consisted of mucous cells and columnar cells. The esophageal glands were present in submucosa. The columnar cells were ciliated. According to the diverging ultrastructure of mucous vesicles, three types of mucous cells could be identified in the esophageal mucosa: i) electron-lucent vesicles mucous cell (ELV-MC); ii) electron-dense vesicles mucous cell (EDV-MC); and iii) mixed vesicles mucous cell (MV-MC).

Properties of Silver Nanoparticles Prepared by the Electric Spark Dispersion Method

2013 ◽  
Vol 872 ◽  
pp. 74-78 ◽  
Author(s):  
S.P. Zhuravkov ◽  
Evgeny Plotnikov ◽  
Dmitry Martemiyanov ◽  
Nikolay A. Yavorovsky ◽  
Ulrich Hasse ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Silver Nanoparticles ◽  
Structural Characteristics ◽  
Silver Particles ◽  
Dispersion Method ◽  
Force Microscopy ◽  
Atomic Force ◽  
Transmission Electron ◽  
Light Scattering Spectroscopy

The morphological and structural characteristics of nanoscale silver particles obtained by the method of electric spark dispersion of metal granules in the liquid aprotic medium were obtained using atomic force microscopy, transmission electron microscopy, and dynamic light scattering spectroscopy. The specific surface, morphology, structure and the distribution by size of the particles are presented.

Electron Microscopy Characterization of Humidity Ball-Milling AlCuFe Intermetallic Powders

2009 ◽  
Vol 1242 ◽  
Author(s):  
C. Patiño-Carachure ◽  
O. Téllez-Vazquez ◽  
A. Bedolla-Jacuinde ◽  
R. Esparza ◽  
C. Ángeles-Chávez ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Ball Milling ◽  
Structural Characteristics ◽  
Size Reduction ◽  
Particle Size Reduction ◽  
Casting Technique ◽  
Environmental Embrittlement ◽  
Transmission Electron ◽  
Microscopy Characterization

ABSTRACTAn Al58Cu25Fe17 alloy composition was produced by conventional casting technique. In order to take advantage from the hydrogen-environmental embrittlement reaction, which affects these alloys, this research was carried out subjecting prealloyed powders to wet-ball milling. Through these experiments it has been possible to evaluate the particle size reduction as consequence of hydrogen fracture and milling energy. The morphological and structural characteristics of the samples were performed using x-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and transmission electron microscopy (TEM). The experimental results indicate that the samples with higher contents of humidity have a good particle size reduction. With the increment of milling time, the particle size was diminished even more reaching nanometer size scale.

Study on the Preparation and Properties of EVA-G-PU/OMMT Nanocomposites

2010 ◽  
Vol 123-125 ◽  
pp. 247-250
Author(s):  
Yu Qing Zhang ◽  
Yu Xin He ◽  
Li Zhang ◽  
Jun Xian Li
Keyword(s):  
Electron Microscopy ◽  
Mechanical Analysis ◽  
Clay Nanocomposites ◽  
Gravimetric Analysis ◽  
Thermal Gravimetric ◽  
X Ray Diffraction ◽  
Thermal Stabilities ◽  
X Ray ◽  
Transmission Electron ◽  
New Type

A new type of EVA-g-PU/OMMT nanocomposites was synthesized through the method of chemical modification and melt intercalation. FTIR testing showed that the PU prepolymer was grafted on EVA main chains successfully. The structures of EVA-g-PU/OMMT nanocomposites were characterized by X-ray diffraction (XRD) and by high-resolution transmission electron microscopy (HRTEM). The enhanced storage modulus of EVA-g-PU/OMMT nanocomposites was characterized by dynamic mechanical analysis (DMA). The thermal stabilities of EVA/clay nanocomposites were also studied by thermal gravimetric analysis (TGA). Mechanical testing showed that the tensile strength and tear strength of EVA-g-PU/OMMT nanocomposites were far superior to pure EVA.

scholarly journals Thermosensitive nanocomposite hydrogel based pluronic-grafted gelatin and nanocurcumin for enhancing burn healing

2019 ◽  
Vol 2 (4) ◽  
pp. 146-154
Author(s):  
Trinh Thi Ngoc Huynh ◽  
Ha Le Bao Tran ◽  
Vu Nguyen Doan ◽  
Quyen Ngoc Tran
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Tissue Regeneration ◽  
Aqueous Solubility ◽  
Release Profile ◽  
Pluronic F127 ◽  
Nanocomposite Hydrogel ◽  
Curcumin Nanoparticles ◽  
The Poor ◽  
Transmission Electron

Curcumin is extracted from turmeric exhibiting several biomedical activities. Unfortunately, less aqueous solubility was still a drawback to apply it in medicine. This study introduced a method to produce a thermosensitive nanocomposite hydrogel (nCur-PG) containing curcumin nanoparticles (nCur) which can overcome the poor dissolution of curcumin. Regarding to the method, a thermo-reversible pluronic F127-grafted gelatin (PG) play a role as surfactant to disperse and protect nanocurcumin from aggregation. The synthetic PG was identified by 1H-NMR. The obtained results via Transmission Electron Microscopy (TEM) and Dynamic Light Scattering (DLS) indicated that the size of nCur was various in the range from 1.5 ± 0.5 to 128 ± 9.7 nm belong to amount of the fed curcurmin. The nCur-dispersed PG solution formed nCur-PG when the solution was warmed up to 34-35 oC. Release profile indicated sustainable release of curcumin from hydrogel. Thermosensitive nanocomposite hydrogel based pluronic-grafted gelatin and nanocurcumin performed potential application of the biomaterial in tissue regeneration.

Study on the Microstructure of Inorganic Fullerene-Like WS2

2013 ◽  
Vol 544 ◽  
pp. 183-186
Author(s):  
Tao Zhang ◽  
Tian Ma ◽  
Peng Gang Gao ◽  
Feng Chuan Shen ◽  
Jian Chun Zhang
Keyword(s):  
Electron Microscopy ◽  
Shock Wave ◽  
Transmission Electron Microscopy ◽  
Spherical Shape ◽  
Uniform Stress ◽  
Inorganic Fullerene ◽  
Transmission Electron ◽  
Absorbing Material ◽  
New Type ◽  
Scanning Electron

The microstructure of the inorganic fullerene-like WS2 was analyzed by scanning electron microscope (SEM) and high-resolution transmission electron microscopy (HRTEM) in this work. The results indicate that the diameter of the WS2 particles is around 60~120 nm. The WS2 consists mainly of hollow polyhedral structures with quasi-spherical shape that is capable of sustaining much higher shock pressures due to a more uniform stress distribution on its surface. This characteristic made it a super shock wave absorbing material, which is great worth of bullet proof applications. This work is expected to develop a new type bullet-proof composite which can be used in the army.

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