Abstract: A braking device capable of generating a larger braking force is provided.

Abstract: A braking device capable of effectively causing a shearing stress of a magnetorheological fluid to act on both surfaces of the rotation body is provided. The present invention provides a braking device including a first soft magnetic material 1, a coil 3 attached to the first soft magnetic material 1, a second soft magnetic material 2, a activation chamber 4 formed between the first soft magnetic material 1 and the second soft magnetic material 2, and a rotation body 5 provided inside of the activation chamber 4, and a magnetorheological fluid 6 filling a gap between the rotation body 5 and the first soft magnetic material 1 and a gap between the rotation body 5 and the second soft magnetic material 2, wherein the rotation body 5 includes low magnetoresistive parts 5a, 5b made of a soft magnetic material and a high magnetoresistive part 5c in which a magnetic flux is less likely to flow, and the high magnetoresistive part 5c is provided at a portion of the rotation body 5 facing the coil 3.

Abstract: A braking device capable of generating a larger braking force is provided.

Abstract: A method for producing a formed product of deproteinized natural rubber latex capable of reducing a content of an allergen in a natural rubber latex material to a level sufficient to keep the latex from being harmful to the human body without decreasing yields of the product and deteriorating formability of the latex. In the method, cleaning removal of a non-rubber content is carried out after each of protein decomposition, prevulcanization and forming. An aqueous alkali solution, ammonia, water containing free chlorine in an amount of 0.005 to 0.02% by weight or alcohol-water mixed liquid containing alcohol in an amount of 5 to 80% by weight is used as cleaning liquid for the cleaning removal. The method is suitably applied to production of a natural rubber product such as a rubber glove, a condom, a catheter, a foam rubber material and the like.

Abstract: A condom prophylactic against AIDS infection coated with acidic polysaccharides is provided which has an antiviral action and a method of the manufacture thereof. The acidic polysaccharides can be polysaccharides, protein-bound saccharides and glycolipids such as extracts from sea-weeds, extracts from Procaryomycota and Eucaryomycota, carrageenan and so on which have acidic groups such as sulfuric acid group in a portion of polysaccharides. A condom is coated with a solution of said acidic polysaccharides, and optionally with a lubricant. AIDS infection can be prevented without side effect by using a condom of the present invention.

Abstract: A depolymerized natural rubber having a number-average molecular weight of from 2,000 to 50,000 obtained by the depolymerization of a deproteinized natural rubber. A process for the preparation of a depolymerized natural rubber comprises dissolving a deproteinized natural rubber into an organic solvent so as to give a concentration of from 1 to 30% by weight and then carrying out air oxidation of the resulting solution in the presence of a metallic catalyst. The depolymerized natural rubber can provide the same physical properties as ordinary vulcanized rubbers, exhibits no odor or color characteristic to natural rubbers and causes no immediate allergy induced by protein.

Abstract: An instrument for induction of labor comprising a tubular member or catheter being closed at its forward or leading end and open at its rearward or trailing end; there being an inflatable bag or balloon in enveloping relationship to the forward end portion of the catheter and being engaged in leak-proof manner thereto. At least one orifice is provided adjacent the forward end of the catheter within the bag for effecting communication between the said bag and the catheter for the introduction of liquid into the bag for inflating same to a predetermined extent dictated by the presentation of the fetus. A method for inducing labor comprising inserting into the uterus a liquid inflatable bag mounted upon the forward end portion of a tubular member with the bag being presented between the uterine wall and the amniotic membrane.

Abstract: An instrument for induction of labor comprising a tubular member or catheter being closed at its forward or leading end and open at its rearward or trailing end; there being an inflatable bag or balloon in enveloping relationship to the forward end portion of the catheter and being engaged in leak-proof manner thereto. At least one orifice is provided adjacent the forward end of the catheter within the bag for effecting communication between the said bag and the catheter for the introduction of liquid into the bag for inflating same to a predetermined extent dictated by the presentation of the fetus. A method for inducing labor comprising inserting into the uterus a liquid inflatable bag mounted upon the forward end portion of a tubular member with the bag being presented between the uterine wall and the amniotic membrane.