摘要:
A turbine device includes a rotor having a plurality of turbine blades disposed between an inner-diameter surface and an outer-diameter surface. The turbine blades are of a front or intermediate loaded type near the inner-diameter surface and of a rear loaded type near the outer-diameter surface.
摘要:
A centrifugal or mixed flow type turbomachine, of a diffuser type can operate stably at low flow rates below the design flow rate, by preventing the initiation of flow instability in the system. The turbomachine comprises a stabilization member disposed in a predetermined location of the diffuser section which prevents a generation of unstable flow in the diffuser section during a low flow rate operation.
摘要:
An amphipathic compound represented by any of the following Formulas: ##STR1## (R.sub.1 is a linear or branched, saturated hydrocarbon group having 6 to 48 carbon atoms, or a linear or branched, unsaturated hydrocarbon group containing 1 to 12 unsaturated double bond and having 6 to 48 carbon atoms; Y is NH, N--(CH.sub.2 --CH.dbd.CH.sub.2), or O; Q is --CH.sub.2 --C(R.sub.2).dbd.CH.sub.2 or --R.sub.4 --O--CO--C(R.sub.2).dbd.CH.sub.2 ; and M is alkali metal, an ammonium group, or --(CH.sub.2 CH.sub.2 O).sub.m H), a copolymer of the amphipatic compound with a copolymerizable ethylenically unsaturated compound and, a paper making additive containing a water soluble or dispersible high molecular compound as an active ingredient and processes for producing these high molecular compounds.
摘要:
At least one of ammonia and ethylenediamine is reacted with monoethanolamine in the presence of a catalyst containing phosphoric acid or its condensate in order to prepare acyclic ethyleneamines, and the catalyst can be improved in performance and the life of the catalyst can be prolonged by feeding a phosphorus-containing material to a reaction system during the reaction. In addition, the catalyst having a deteriorated performance can be reactivated by adding the phosphorus-containing material to the catalyst.
摘要:
This endoscopic treatment system is provided with an insertion-retraction and rotating device for a treatment tool, which performs an insertion-retraction operation along a direction of an axis of a treatment tool and a rotating operation around the axis, of the treatment tool inserted in a channel of an endoscope.
摘要:
A clipping apparatus comprises a clip capable of being arbitrarily opened/closed, a stop tube for closing the clip, a link member capable of being inserted into the stop tube, and engaged with the clip, a sheath section capable of housing the clip and the stop tube therein, and a manipulating wire inserted into the sheath section. This clipping apparatus further comprises a hook section for, when the clip and the stop tube is protruded frontally of the sheath section, causing the sheath section and the stop tube to be engaged with each other, and disabling the stop tube from being housed in the sheath section again.
摘要:
An economical and industrial method for the dehydrogenation of triisopropyl benzene can be provided by carrying out the reaction employing a solid catalyst having an iron compound and potassium compound as major components or an iron compound, potassium compound, and magnesium compound as major components, as a dehydrogenating catalyst for producing diisopropyl isopropenyl benzene, isopropyl diisopropenyl benzene and/or triisopropenyl benzene from triisopropyl benzene. In the dehydrogenation of triisopropyl benzene or diisopropyl benzene, by carrying out an off-and-on reaction in which the above described solid catalyst is employed and with which a regeneration period with steam or oxygen or air is provided, an economical and industrial dehydrogenation method having an extended life of the catalyst can be provided and will have an industrial superiority.
摘要:
A treatment apparatus to treat a tissue in a body cavity is disclosed. The apparatus comprises a base disposed in the vicinity of a tip-end portion of an endoscope, and an in-tissue inserting portion including a base end supported by the base and a tip end insertable in the tissue in the body cavity in a direction substantially parallel to the surface of the tissue, and extending to the tip end from the base end in a tapered shape. The in-tissue inserting portion has an inner side disposed in the vicinity of the surface of the tissue when inserted into the tissue. The apparatus further comprises a high-frequency electrode, for treating the tissue, supported by the base and disposed in the vicinity of the inner side of the in-tissue inserting portion, and a cable which supplies power to the high-frequency electrode from a high-frequency power source outside the body.
摘要:
A process for preparing vitamin D derivatives having the following formula: wherein R1, R2, R3, and R4, which may be the same or different, represent a hydrogen atom or a protecting group, comprising: reacting a compound of formula (2) wherein R1 represents a hydrogen atom or a protecting group, with a compound having the formula (3) wherein R1 represents a hydrogen atom and R2, R3, and R4, which are the same or different, represent a hydrogen atom or a protecting group.