摘要:
A transparent optical material containing at least one selenium atom, a plastic lens comprising the transparent optical material, and methods for preparing them. In addition, there are also disclosed novel selenium-containing compounds represented by the following formulae (1), (2) and (4) which are useful for the transparent optical material and the plastic lens: ##STR1## wherein symbols are as defined in the specification.
摘要:
Cells or endospores of a butyric-acid bacterium Clostridium butyricum MII588-Sens 1 strain, or cells or endospores of a butyric-acid bacterium Clostridium butyricum MII588-Res 1 strain are effective as a biological intestinal antiseptic.
摘要:
A binding device for hoses floating on the water surface, particularly, for a plurality of hoses arranged in parallel and floating on the water surface and connecting adjacent two hose lines by chains, comprising a resilient cylindrical cushioning body having a center bore surrounding the chain and including a buoyant member and reinforcing element embedded therein.
摘要:
A polymerizable composition for polythiourethane optical materials comprising a compound represented by the general formula (1), M(L)n (1) wherein, in the formula, M is Al, Fe, Cu, Zn, Zr or Bi; L is a dithiocarbamic acid group, a sulfonic acid group, a mono- or di-alkyl phosphoric acid ester group, a substituted acetylacetonato group or a halogen; and n is an integer of 1 to 5, one or two or more isocyanates selected from the group consisting of isocyanate compounds and isothiocyanate compounds, and one or two or more active hydrogen compounds each having a mercapto group. The compounds represented by the general formula (1) exhibit catalytic activity equal to or superior to that of organotin catalysts having been employed as catalysts for the production of polythiourethane optical materials from the past, and have high safety. Further, the thus obtained polythiourethane resins satisfactorily meet the property requirements for optical materials, in particular, excelling in weather resistance. Therefore, the proposed catalysts are available as novel catalysts replacing the organotin catalysts.
摘要:
Provided are a polymerizable composition for giving a resin which has a high refractive index and low dispersion, and is especially excellent in impact resistance and tintability; and a resin and an optical component each obtained by curing the composition. There used a polymerizable composition comprising (A) a compound represented by Formula (1) and/or by Formula (2), at least one compound as the following component (B), and at least one compound as the following component (C): (B) polythiol compounds optionally having at least one (poly)sulfide bond in a molecule, and (C) compounds represented by Formula (3): HO—[R1-(Y)n]m—R2-X (3) (in above Formula (3), X is an OH group or a SH group; Y is an oxygen atom or a sulfur atom; R1 and R2 are each independently an optionally substituted methylene group or an optionally substituted alkylene group having carbon atoms of not smaller than 2 and not larger than 4; n is an integer of 0 or 1 when Y is an oxygen atom, or 0 or an integer of not smaller than 1 and not larger than 2 when Y is a sulfur atom; and m is 0 or an integer of not smaller than 1 and not larger than 3, provided that (carbon number of R1+n)×m+(carbon number of R2) is 3 or larger).
摘要:
An open/close control system for an inspection lid adapted not to open while a vehicle travels. An emergency release device is provided behind the inspection lid, where the emergency release device disables power transmission of a driver which opens and closes a side entrance/exit door of a railway vehicle. The emergency release device is installed in a space inside a wall surface inside the vehicle, and the space can be opened and closed by the inspection lid. The open/close control system has a locking device provided in the space inside the wall surface in order to restrict rotation of the inspection lid, and also has an open/close controller which detects traveling of the railway vehicle to actuate the locking device.
摘要:
A valve body 3 is provided at its one side with a part for receiving an operation tool which turns a valve spindle, the valve body further provided at the other side with a part for mounting a connection tool 8 by which an external piping is attached and detached, and the valve body 3 moreover provided at the middle with a part 33 having a non-round cross section and a part 34 concaved from the outside surface of the part 33. A support member 4 consists of an engaging section 43 which engages with the part 33 to restrict or prevent the valve body 3 from turning and shifting in position, and an engaging section 44 which engages with the part 34 to restrict or prevent the valve body 3 from axially shifting in position.
摘要:
A valve body 3 is provided at its one side with a part for receiving an operation tool which turns a valve spindle, the valve body further provided at the other side with a part for mounting a connection tool 8 by which an external piping is attached and detached, and the valve body 3 moreover provided at the middle with a part 33 having a non-round cross section and a part 34 concaved from the outside surface of the part 33. A support member 4 consists of an engaging section 43 which engages with the part 33 to restrict or prevent the valve body 3 from turning and shifting in position, and an engaging section 44 which engages with the part 34 to restrict or prevent the valve body 3 from axially shifting in position.
摘要:
This invention relates to a fiber-made surface fastener comprising joining faces each in which a plurality of fiber-made engaging elements are provided on one surface of each flat base fabric. By specifying a structure and composition yarns of the base fabric of the same surface fastener, the ratio (A/B) of an area A of a range in which sound spectrum of a peeling-off sound Fourier-transformed in a range of 100 Hz to 15000 Hz is 100 Hz to 3000 Hz to an area B of a range in which sound spectrum of a peeling-off sound Fourier-transformed in a range of 100 Hz to 15000 Hz is 3000 Hz to 15000 Hz is 0.4 or more. Consequently, tone of a sound generated when the surface fastener is peeled off and when the surface fastener attached on a product is peeled off is shifted to a low tone side so as to reduce an uncomfortable sound to a lower tone thereby reducing a feeling of discomfort.