Study on hollow cavity of 140-GHz gyrotrons

Simple bone cyst (SBC) of the jaws is uncommon, representing approximately 1% of all jaw cysts. It is often accidentally discovered on routine dental examination as it is asymptomatic in most of cases. In this report, we discuss a case of SBC in a 16 years old female who presented in our department for correction of her mal-aligned teeth. On routine x-ray for orthodontic treatment, a well defined, unilocular radiolucent area approximately 3x1cm in size with scalloped borders on the left body of mandible expanding from distal surface of 34 to distal surface of 37 was discovered. Surgical exploration was required for both diagnostic and definitive treatment. The operative finding was hollow cavity without any epithelial lining.

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Adsorption Performance of Human-like Collagen by Alkali-modified Kapok Fiber: A Kinetic, Equilibrium, and Mechanistic Investigation

10.21203/rs.3.rs-1013583/v1 ◽

2021 ◽

Author(s):

Liyao Cao ◽

Hongchang Wang ◽

Hua Shen ◽

ruiliu Wang ◽

Fumei Wang ◽

...

Keyword(s):

Fiber Surface ◽

Alkali Concentration ◽

Composition Analysis ◽

Order Kinetic ◽

Water Contact ◽

Kapok Fiber ◽

Mechanistic Investigation ◽

Cavity Structure ◽

Hollow Cavity ◽

Adsorption Amount

Abstract Collagen-based dressings achieve excellent repair of the skin during metical cosmetology, which has received a lot of attention recently. Although great progress has been made on using biomass fiber as dressing carrier, more research is required on developing novel biomass fibers because of the limitations of (i.e., high cost and complex processing) of existing materials. In this study, the adsorption behaviors of two human-like collagen were studied by examining the Kapok fiber that was modified using alkali consisting of various amounts of the mass fraction. Results show that the alkali-modified Kapok fiber surface becomes rough with vertically arranged grooves, and the cross-section depicts the hollow cavity structure. The composition analysis of alkali modified Kapok shows that alkali dissolves part of the hemicellulose and lignin. Additionally, the surface energy rises sharply and the water contact angle changed from hydrophobic to hydrophilic. The adsorption amount of raw Kapok fiber is around 0.6g/g, which accounts for only one twenty-first of the adsorption amount of alkali-treated Kapok (around 12.6g/g), while the equilibrium adsorption amount was not sensitive to alkali concentration. The kinetics of human-like collagen followed both Quasi first and Quasi second order kinetic model, implying that the adsorption process where characterized by both physisorption and chemisorption. Finally, characterization of the AKF-2 coupled with the studies based on the inter-particle diffusion model showed a three-step of human-like collagen diffusion consisting of surface diffusion, inter-fiber diffusion and fiber' hollow cavity diffusion. Our results demonstrate a perfect high absorption performance of Kapok fiber providing a potential for application of collagen-base dressings.

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Optical manipulation of microparticles with a fiber tip containing a hollow cavity

Optical and Quantum Electronics ◽

10.1007/s11082-018-1494-0 ◽

2018 ◽

Vol 50 (6) ◽

Author(s):

Xiaoqi Ni ◽

Ming Wang ◽

Ri Wang ◽

Yan Huang ◽

Yiping Wang ◽

...

Keyword(s):

Optical Manipulation ◽

Hollow Cavity

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hollow cavity

Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik ◽

10.1007/978-3-642-41714-6_81207 ◽

2014 ◽

pp. 683-683

Keyword(s):

Hollow Cavity

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Influence of Electron Beam Misalignment on the Performance of a 0.24 THz, 1.5 MW Hollow-Cavity Gyrotron Design for DEMO

2018 43rd International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz) ◽

10.1109/irmmw-thz.2018.8510146 ◽

2018 ◽

Author(s):

P. C. Kalaria ◽

K. A. Avramidis ◽

G. Gantenbein ◽

S. Illy ◽

I. Gr. Pagonakis ◽

...

Keyword(s):

Electron Beam ◽

Hollow Cavity

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Koo–Kleinstreuer–Li correlation for simulation of nanofluid natural convection in hollow cavity in existence of magnetic field

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-019-08038-6 ◽

2019 ◽

Vol 137 (4) ◽

pp. 1413-1429 ◽

Cited By ~ 8

Author(s):

Yuan Ma ◽

Rasul Mohebbi ◽

M. M. Rashidi ◽

Zhigang Yang

Keyword(s):

Magnetic Field ◽

Natural Convection ◽

Hollow Cavity

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Recent Status and Future Prospects of Coaxial-Cavity Gyrotron Development at KIT

EPJ Web of Conferences ◽

10.1051/epjconf/201920304005 ◽

2019 ◽

Vol 203 ◽

pp. 04005

Author(s):

Stefan Illy ◽

Konstantinos A. Avramidis ◽

Gerd Gantenbein ◽

Zisis Ioannidis ◽

Jianbo Jin ◽

...

Keyword(s):

Output Power ◽

Power Plants ◽

Short Pulse ◽

Future Prospects ◽

Coaxial Cavity ◽

Hollow Cavity ◽

The Moment ◽

Microwave Sources ◽

Long Pulse ◽

Highly Loaded

Coaxial-cavity gyrotrons are microwave sources that can extend the possible power levels of hollow cavity gyrotrons significantly and make them attractive for future fusion experiments and power plants. KIT already demonstrated operation of a modular short-pulse 170 GHz coaxial-cavity gyrotron with an output power of 2.2 MW, operating in the TE34,19 mode. Today’s focus of KIT is the verification of this technology at longer pulses, which will prove the long-pulse capabilities also. At the moment, the current KIT prototype has been extended with cooling capabilities for all critical, highly loaded components of the tube and two new, different electron guns are available for operation. This paper will give an overview about the recent status and the future prospects connected to the coaxial-cavity gyrotron development at KIT, including both experimental and theoretical activities.

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Effect of Cytokinin and Auxin Application on Vessel Differentiation and Development of Hollow Cavity in the Roots of Japanese Radish (Raphanus sativus L.)

Engei Gakkai zasshi ◽

10.2503/jjshs.76.310 ◽

2007 ◽

Vol 76 (4) ◽

pp. 310-315

Author(s):

Nobuyuki Fukuoka

Keyword(s):

Raphanus Sativus ◽

Japanese Radish ◽

Raphanus Sativus L ◽

Hollow Cavity

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XX. Crystals of Iron

Mineralogical Magazine and Journal of the Mineralogical Society ◽

10.1180/minmag.1878.002.11.08 ◽

1878 ◽

Vol 2 (11) ◽

pp. 223-227

Author(s):

Amos Beardsley

Keyword(s):

General Meeting ◽

Pig Iron ◽

King's College ◽

Hollow Cavity ◽

Microscopical Society ◽

Royal Microscopical Society ◽

Roll Out ◽

The Way

At the General Meeting of the Society held at the rooms of the Royal Microscopical Society, King's College, London, on March 14th, 1877, were exhibited some octahedral crystals of iron, which were procured from a hollow cavity in the middle of a bar of pig iron. The way in which they came into my possession was this.A friend was walking on the Docks at Liverpool some years ago, watching a vessel being unloaded, which had arrived freighted with pig iron from Gartsherrie. These pigs were lifted by cranes, and one accidentally slipped, and dropped on to its end, and was fractured in two pieces, showing a cavity about the size of a duck's egg, and his attention was drawn to some bright lustrous objects which he saw roll out of the cavity. These he at once picked up, and found they were crystals of the metal, octahedral in shape, and about ⅗ of an inch in size.

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