摘要:
A method for producing an outer layer for a roll having a structure having MC carbide dispersed at an area ratio of 20-60%, comprising the steps of (1) centrifugally casting a melt having a composition comprising, by mass, 2.2-6.0% of C, 0.1-3.5% of Si, 0.1-3.5% of Mn, and 8-22% of V, the balance being Fe and inevitable impurity elements, to produce a cylindrical body comprising an inner layer having concentration MC carbide, an MC-carbide-poor outer layer, and a concentration gradient layer between the inner layer and the outer layer, in which the area ratio of MC carbide changes, and (2) cutting the cylindrical body to a depth at which the area ratio of MC carbide is 20% or more.
摘要:
Novel cobalt oxyhydroxide is provided with which a positive electrode of an alkaline storage battery having conductivity higher than that of the conventional positive electrodes can be produced, and a method for producing the same is provided. Furthermore, an alkaline storage battery having a high capacity and that can be manufactured easily is provided. The cobalt oxyhydroxide is used for a positive electrode of an alkaline storage battery, in which a first peak corresponding to a crystal plane (003) of the cobalt oxyhydroxide and a second peak corresponding to a crystal plane (012) of the cobalt oxyhydroxide are present on a diffraction line obtained by X-ray diffraction measurement when employing copper Kα radiation as a radiation source, a half-power band width of the first peak is 0.6° or less, and a value obtained by dividing a strength of the first peak by a strength of the second peak is 10 or less.
摘要:
A positive electrode for an alkaline storage battery having a high capacity and facilitating the manufacturing thereof and an alkaline storage battery using the same are provided. The positive electrode utilized includes active material powder containing nickel hydroxide and powder made of cobalt compounds, where a ratio of a cobalt compound with a valence of cobalt being 2.6 or more to the whole of cobalt compounds is 30 weight % or more.
摘要:
2-Methyl-{4-O-(2-amino-2-deoxy-&bgr;-glucopyranosyl)-1,2-dideoxy-&agr;-glucopyrano}(2,1-d)-2-oxazoline of the following formula or an acid addition salt thereof A 50% deacetylated chitin having a repeating structure represented by the following formula, an oligosaccharide thereof or an acid addition salt thereof wherein n is an integer.
摘要:
A front body structure for a vehicle has a pair of front side frames of a boxed-type which extend in a lengthwise direction from the front to the back of the vehicle at opposite sides of the front body. The front side frame has a closed rectangular cross section which has an approximately constant height over the length and has a height-to-width ratio gradually decreasing toward a ratio of 1 (one) as the front frame comes closer to the forward end thereof.
摘要:
A battery electrode substrate which is constituted of a porous metallic body structure having communicating pores at a porosity of at least 90% and an Fe/Ni multilayer structure wherein the skeletal portion of the porous metallic body is composed mainly of Fe and has an Ni covering layer on the surface thereof while pores communicating with the inside and outside of Fe skeletal portion exist in the Fe skeletal portion and the inside of the pores is covered with Ni. The electrode substrate is produced by applying an iron oxide powder of at most 20 .mu.m in an average particle size on a porous resin core body; heat treating the core to remove an organic resin component while simultaneously sintering Fe to obtain a porous Fe body; and then covering the Fe skeletal portion with Ni by electroplating. In this process, the iron oxide can be used in combination with carbon powder. Further, a nickel porous sintered body can also be produced using nickel oxide in place of iron oxide.
摘要:
A side air bag apparatus installed within a seat has an air bag unit containing an inflator and a folded air bag in an air bag unit housing which is placed on a side of the center of the seat with respect to and in close proximity to a frame member extending along a side section of the seat so as to direct an opening of the air bag unit housing in a specified direction. The air bag unit housing is secured to the frame member by a bracket frame.
摘要:
For providing an alkaline storage battery having a high energy density in a broader temperature range, the charge efficiency of a nickel positive electrode at the time of charging at high temperatures is enhanced by incorporating verbium and at least two elements selected from the group consisting of yttrium, and ytterbium in the form of a compound those and further at least one element selected from the group consisting of lanthanum, praseodymium, neodymium, samarium, gadolinium, terbium, dysprosium, holmium, thulium, cerium, promethium, europium, and lutetium in the form of a compound into a positive electrode paste containing a major component of nickel oxide as an active material.
摘要:
In the paste type nickel positive electrode prepared by filling pores of a metal nickel plaque made of three-dimensional high porous sheet, or coating both sides or one side of a plaque made of either perforated nickel sheet or nickel plated steel sheet, with a paste type active material mainly composed of nickel hydroxide, by adding particles of cobalt hydroxide having the specific surface area of at least 10 m.sup.2 /g, average particle size of 1.7 microns or more, and content of fine particles with particle size of 1.0 micron or less of 20% or less, the utilization of positive electrode active material is enhanced, and by using this nickel positive electrode, the alkaline rechargeable battery, in particular, the nickel-metal hydride alkaline battery is enhanced in capacity and extended in service life.
摘要:
Di-N-acetyl-D-chitobiose, which is easily available as a chitin decomposate or a chemical reagent, is reacted with a microorganisms-derived deacetylase to produce 2-acetylamino-4-O-(2-amino-2-deoxy-.beta.-D-glucopyranosyl)-2-deoxy-D-glucose of formula (1). ##STR1## The method is quantitative and efficiently produces the compound (1). The compound (1) and its salts are usable as substrates for measuring enzymatic activities, and also as starting substances in the production of various food materials and in the field of glyco-chain engineering.