A construction of buildings with no rank 3 residues of spherical type

1986 ◽  
pp. 242-248 ◽  
Author(s):  
M. A. Ronan
Keyword(s):  
Spherical Type

scholarly journals On parabolic subgroups of Artin–Tits groups of spherical type

2019 ◽  
Vol 352 ◽  
pp. 572-610 ◽  
Author(s):  
María Cumplido ◽  
Volker Gebhardt ◽  
Juan González-Meneses ◽  
Bert Wiest
Keyword(s):  
Parabolic Subgroups ◽  
Spherical Type

scholarly journals An investigation of the effects of variations in the radiation factor on the efficiency of dewar vessels

1926 ◽  
Vol 112 (760) ◽  
pp. 136-151
Keyword(s):  
Hot Water ◽  
Liquid Oxygen ◽  
Radiation Factor ◽  
Research Committee ◽  
Spherical Type ◽  
Glass Vessel ◽  
A Value ◽  
Dewar Vessel ◽  
Rate Of Cooling ◽  
Rate Of Evaporation

During the course of some work on Dewar vessels, which was carried out by one of us (B. L.) and S. F. Gates for the Oxygen Research Committee, a curious anomaly was noticed in the behaviour of an all-metal Dewar vessel. This was a commercial copper vessel of the usual spherical type with a long narrow neck of an alloy of low heat-conductivity; its capacity was two litres. The rate of evaporation of liquid oxygen stored in this vessel was approximately double that of liquid oxygen stored in a silvered glass flask of like capacity; but, when equal weights of hot water were put into each of the vessels, it was found that the rate of cooling of the water in the copper vessel was actually slower than in the silvered glass vessel. It appeared, then, that the copper vessel was only half as efficient as a silvered glass one of like capacity for the storage of liquid oxygen, whereas its efficiency for the storage of hot water was greater than that of the silvered glass vessel. This investigation arose out of a desire to explain the apparent anomaly. Previou work on the factors which influence the efficiency of Dewar vessels has been carried out by Dewar ('Proc. Roy. Inst.,' 1898, p. 815), Banneitz, Rhein and Kurze ('Ann. d. Phys.,' 1920, vol. 61, p. 113), and Briggs ('Proc. Roy. Soc. Edin.,' 1920, vol. 51, p. 97). These investigations have dealt with the efficiency of Dewar vessels considered only as containers for liquid air or oxygen, and the above-mentioned anomaly has therefore not been noticed. Briggs ( loc. cit .) worked with vessels with the vacuum-adjacent surfaces of polished gilding metal (95 per cent. copper). From his results on the rates of evaporation of liquid oxygen from these vessels, he calculated a value for the emissivity of the polished surfaces which was considerably greater than that anticipated from the usually accepted value for copper. This observation is intimately connected with that of Lambert and Gates and will be referred to later.

scholarly journals Hypersurfaces of the spherical type in Euclidean spaces

2021 ◽  
Vol 8 (1) ◽  
pp. 83-92
Author(s):  
Carlos M. C. Riveros ◽  
Cid D. F. Machado
Keyword(s):  
Euclidean Spaces ◽  
Spherical Type

Fabrication and Characterization of Cu Doped CeO2 by Hydrothermal Process for Antimicrobial Activity

2019 ◽  
Vol 391 ◽  
pp. 114-119 ◽  
Author(s):  
Yeon Bin Choi ◽  
Jeong Hun Son ◽  
Dong Sik Bae
Keyword(s):  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Hydrothermal Process ◽  
Antibacterial Properties ◽  
Reaction Times ◽  
X Ray Diffraction ◽  
Spherical Type ◽  
Average Size

Cu doped CeO2 nanopowder was synthesized by hydrothermal process at 180°C for 2~10h. The average size and distribution of the synthesized Cu doped CeO2 nanopowder was controlled by reaction times. The crystallinity of the synthesized Cu doped CeO2 nanoparticles was investigated by X-ray diffraction (XRD). The morphology of the synthesized Cu doped CeO2 nanoparticles was observed by FE-SEM. The specific surface area of the synthesized Cu doped CeO2 nanoparticles was measured by BET. The crystal size of the synthesized Cu doped CeO2 nanoparticles decreased with decreasing reaction times. The average size of the synthesized Cu doped CeO2 nanoparticles was below 10nm and narrow, respectively. The shape of the synthesized Cu doped CeO2 nanoparticles was spherical type. The specific surface area of the synthesized Cu doped CeO2 nanoparticles increased with decreasing reaction times. Antibacterial properties of Cu doped CeO2 were analyzed by MIC method. The synthesized Cu doped CeO2 nanopowders showed antibacterial properties against E.coli and B.sub bacteria.

Intestine ultrastructure of the facultative parasite Halicephalobus gingivalis (Nematoda: Panagrolaimidae)

Nematology ◽  
2009 ◽  
Vol 11 (6) ◽  
pp. 859-868 ◽  
Author(s):  
Pamela Fonderie ◽  
Maxime Willems ◽  
Wim Bert ◽  
Wouter Houthoofd ◽  
Hanne Steel ◽  
...  
Keyword(s):  
Intestinal Tract ◽  
Single Layer ◽  
Type I ◽  
Spherical Type ◽  
Tem Analysis ◽  
Morphological Adaptations ◽  
Free Living Nematode ◽  
Facultative Parasite ◽  
Relationship Of ◽  
Halicephalobus Gingivalis

Abstract Halicephalobus gingivalis, classified as a free-living nematode, is a known facultative parasite of horses, zebras and humans. However, detailed information concerning its internal morphology is lacking, especially in relation to possible adaptations to its lifestyle as a facultative parasite. The research presented here uses TEM and PI staining to analyse the morphology of the intestine of H. gingivalis. Specimens cultured under different conditions were included to determine if differences in ultrastructure are induced by culturing method. TEM analysis revealed that the intestinal tract comprises a single layer of cells in which nine pairs of nuclei can be distinguished. Further, unusual dichotomously and trichotomously branched microvilli were observed next to finger-like cylindrical microvilli, the latter being the most commonly described form in nematodes. Finally, three different types of secretion vesicles, i.e., spherical (type I), thread-like (type II) and enlarged globular (type III), occurred independently from each other along the intestinal tract. The relationship of morphological adaptations of the microvilli to parasitism in nematodes is discussed.

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