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abstract: 'We study Killing horizons and their neighbourhoods in the Kerr–NUT–(anti-)de Sitter and the accelerated Kerr–NUT–(anti-)de Sitter spacetimes. The geometries of the horizons have an irremovable singularity at one of the poles, unless the parameters characterising the spacetimes satisfy the constraint we derive and solve in the current paper. In the Kerr-NUT-de Sitter case, the constraint relates the cosmological constant of spacetime and the horizon area, leaving 3 parameters free. In the accelerated case the acceleration becomes a 4th parameter that allows the cosmological constant to take arbitrary value, independently of the area. We find that the neighbourhoods of the non-singular horizons are non-singular too, at least in the non-extremal case. Finally, we compare the embedded horizons with previously unembedded horizons provided by the local theory of typeThis invention relates to a crosslinked glycosaminoglycan. More particularly, it is concerned with a crosslinked glycosaminoglycan or salt thereof, which is prepared by crosslinking a glycosaminoglycan (hereinafter referred to as "GAG") or a salt thereof with a polyfunctional epoxy compound.
As GAG which has been hitherto found in this field, there may be mentioned as non-sulfated GAG hyaluronic acid and chondroitin (hereinafter referred to as "Ch"), while there are known as sulfated GAG chondroitin sulfate (hereinafter referred to as "ChS"), heparin (hereinafter referred to as "Hep"), heparan sulfate (hereinafter referred to as "HS"), keratan sulfate (hereinafter referred to as "KS"), and keratanpolysulfate (hereinafter referred to as "KPS"). Also, ChS may includes ChS-A, ChS-B, ChS-C, Ch-S, ChS-E, ChS-F and ChS-H.
It has been recently elucidated that such GAG's may participate in