Abstract: There is provided a pit initiation evaluation system or the like capable of predicting pit initiation effectively and at low cost. In a pit initiation evaluation system of an embodiment, a pit initiation evaluation unit creates and retains, based on a dry-wet alternate time data, a deposit impurity concentration data, and a pit initiation data on pitting corrosion initiated in each of a plurality of turbine stages when an operation is actually performed in the steam turbine, a pit initiation evaluation table presenting a relationship between a dry-wet alternate time, a deposit impurity concentration, and pit initiation. Further, the pit initiation evaluation unit is configured to evaluate, by using the pit initiation evaluation table, pitting corrosion to be initiated in each of the plurality of turbine stages in an operation planned for the steam turbine.

Abstract: An inexpensive Cu-diamond based composite material having excellent heat conductivity and heat resistance. Conventionally, an infiltration method does not provide a Cu-diamond based composite material having high heat conductivity; an ultrahigh pressure method is expensive; and electric current pressure sintering provides relatively high heat conductivity, a low cost, but insufficient heat resistance. A Cu-diamond based solid phase sintered body contains 2 vol % or more and 6 vol % or less of Cr, and 30 vol % or more and 80 vol % or less of diamond particles containing 20 vol % or more of a high crystallinity diamond component.

Abstract: Provided is a heat sink which has excellent processability and is economical, even though it employs diamond, as well as, a process for producing the same. The heat sink is molded using a composition obtained by adding a diamond powder of 0.1 to 100 .mu.m high-purity diamond particles to cemented carbide primarily of WC and a balance of at least one metal selected from Co, Ni and Fe along with impurities. The proportion of the diamond powder admixed relative to the cemented carbide is preferably 5 to 90%, and the diamond heat sink is produced by sintering the particulate mixture of diamond, WC, Co, etc. at a temperature of 1200.degree. to 1500.degree. C. under a pressure of 3 to 6 GPa.

Abstract: The invention provides an apparatus for smelting reduction of iron ore which contains (1) at least one preheat and prereduction furnace which preheats and prereduces iron ore to a prereduction degree of less than 30%; (2) a smelting reduction furnace into which the preheated and prereduced iron ore, carbonaceous material and flux are charged and in which the preheated and prereduced iron ore is reduced; and (3) a top blow oxygen lance having first nozzles for decarburization and second nozzles for post-combustion, oxygen gas being blown through the first nozzles and the second nozzles into the smelting reduction furnace. At least one side tuyere is placed in a side wall of the smelting reduction furnace and at least one bottom tuyere is placed in a bottom wall of the smelting reduction furnace for blowing a stirring gas through the at least one side tuyere and the at least one bottom tuyere into the smelting reduction furnace.

Abstract: An apparatus for a smelting reduction of iron ore comprising a preheat and prereduction furnace which preheats and prereduces iron ore, a smelting reduction furance into which said preheated and prereduced iron ore, carbonaceous material and fluxes are charged and in which said preheated and prereduced iron ore are smelted and reduced, a top blow oxygen lance having decarburizing nozzles and post-combustion nozzles and blowing oxygen into said smelting reduction furance, and at least one side tuyere placed at a side wall of the smelting reduction furnace and at least one bottom tuyere placed at a bottom of the smelting reduction furnace through which a stirring gas is respectively blown so that at least a part of said stirring gas introduced through said at least one side tuyere hits a swollen portion of the molten metal by said stirring gas introduced through said at least one bottom tuyere.

Abstract: A method for smelting reduction of iron ore comprises the steps of: preheating and prereducing iron ore; charging said preheated and prereduced iron ore, carbonaceous material and flux into a smelting reduction furnace; blowing oxygen gas through a top blow oxygen lance having decarburizing nozzles and post-combustion nozzles into said smelting reduction furnace, an end of said top blow oxygen lance being arranged between an upper side level of a slag layer and a lower side level of said slag layer; blowing a stirring gas through at least one side tuyere placed in side wall of said smelting furnace and at least one bottom tuyer placed in bottom wall of said reduction furnace so that at least part of said stirring gas introduced through at least one said side tuyere hits a swollen portion of the molten metal by said stirring gas introduced through at least one said bottom tuyere; and controlling a flow rate of said oxygen gas and said stirring gas blown in said smelting reduction furnace so that an OD of infur

Abstract: A method for smelting reduction of iron ore, comprises the steps of: introducing iron ore into a preheat and prereduction furnace and preheating and prereducing the iron ore, a prereduction degree being less than 30%; charging the iron ore, carbonaceous material and flux into a smelting reduction furnace; blowing oxygen gas, through decarburization nozzles and post-combustion nozzles placed in a top end of an oxygen lance, into the smelting reduction furnace, the top end of the oxygen lance being located so as to be between a top level and a bottom level of a slag layer; blowing a stirring gas through side tuyeres placed in a side wall and bottom tuyeres placed in a bottom wall of the smelting reduction furnace; and controlling a flow amount of the oxygen gas and the stirring gas so that an oxidation degree of an exhaust gas generated in the smelting reduction furnace ranges 0.4 to 0.9 and still a temperature of the exhaust gas ranges 300.degree. to 1300.degree. C.

Abstract: Glutathione peroxidase is produced by fermentation of a microorganism of the genus Mucor. This peroxidase may be used for the determination of lipid peroxide.

Abstract: A gas blowing nozzle is produced by molding a non-porous substance into a molding frame under pressure and at the same time positioning a plurality of gas passageways forming members at predetermined spaces and distances from each other. The passageway holes have cross sectional shapes as desired, so that the gas blowing may be accurately controlled to perform refining of molten metal.

Abstract: There is disclosed the distribution of an amorphous refractory in a case where a lining frame is positioned within a molten metal vessel preliminarily lined with a permanent lining refractory and the amorphous refractory is cast into the space between the permanent lining refractory and the lining frame thereby applying a lining to the inner surface of the vessel.A conical distributor is arranged above the lining frame and the amorphous refractory is continuously delivered from a rotary chute onto the distributor so as to describe a concentric path of moving falling points.

Abstract: Galactose oxidase is produced by culturing a microorganism belonging to the genus Gibberella. The enzyme is useful in the determination of galactose.

Abstract: Glycerol oxidase is an oxidizing enzyme of glycerol characterized by its ability to oxidize glycerol in the presence of oxygen to form hydrogen peroxide and glyceraldehyde. This enzyme is produced by cultivation of a microorganism belonging to the genus Aspergillus or the genus Neurospora in a nutrient medium.

Abstract: Glycerol oxidase II is an oxidizing enzyme of glycerol characterized by its ability to oxidize glycerol in the presence of oxygen to form hydrogen peroxide and glyceraldehyde. This action of the present enzyme is the same as that of the enzyme glycerol oxidase I disclosed in U.S. application Ser. No. 897,695 filed on Apr. 19, 1978. However, this enzyme has characteristic properties in substrate specificity, optimum and stable pH, optimum temperature for action, substrate affinity (Michaelis constant glycerol). This enzyme is produced by culturing a microorganism belonging to the genus Penicillium.

Abstract: Glycerol oxidase is an oxidizing enzyme of glycerol characterized by its ability to oxidize glycerol in the presence of oxygen to form hydrogen peroxide and glyceraldehyde. This enzyme is produced by cultivation of a microorganism belonging to the genus Aspergillus or the genus Neurospora in a nutrient medium.

Abstract: Creatinine desimidase is produced by fermentation of microorganisms belonging to the genera Brevibacterium, Corynebacterium, Pseudomonas and Arthrobacter. The enzyme is recovered from the microbial cells and culture liquor. The enzyme is used for the quantitative determination of creatinine in a sample.

Abstract: Creatinine desimidase is produced by fermentation of microorganisms belonging to the genera Brevibacterium, Corynebacterium, Pseudomonas and Arthrobacter. The enzyme is recovered from the microbial cells and culture liquor. The enzyme is used for the quantitative determination of creatinine in a sample.

Abstract: Novel .beta.-phenoxy- or substituted phenoxy-ethanol compounds or esters thereof expressed by the formula ##STR1## wherein R.sup.1 is a hydrogen atom or an alkyl group, R.sup.2 is a hydrogen atom or a substituent, Y is --OH group or group ##STR2## R.sup.3 is an alkyl group, and n is an integer of 1 to 3. These compounds have juvenile hormone activities, and are useful for hormonal pest control and increased production of silkworm cocoons.

Abstract: Cholesterol esterase is prepared by fermentation of a microorganism capable of producing cholesterol esterase and belonging to the genus Pseudomonas. Cholesterol esterase is useful for the determination of total serum cholesterol.