Abstract: A case is provided for electronic units forming an electronic equipment such as a programmable controller. The case includes a box-type case proper for containing a printed circuit board having connectors to form an electronic circuit, a panel including a terminal board mounting portion and an indicator section for displaying preset values, an indicator section cover for covering a part of the indicator section of the panel, and a cover for covering the upper part of the panel whereby these components are easily combined without using screws or the like. Also, a marking sheet having a color which differs for different types of units can be mounted on the panel.

Abstract: A method of controlling culture wherein cells are aerobically cultured to produce metabolite is characterized by adding substrate and/or inducer to the culture broth, judging the endpoint of the growth of the cells and/or the production of the metabolite or terminating the culture under the guidance of a change in the ratio of the first parameter based on the amount of carbon dioxide evolved by the cell culture to the second parameter based on the amount of oxygen consumed by the cell culture. The ratio is a respiratory quotient, for instance.

Abstract: Expression plasmids containing the full cDNA sequence of calf prochymosin and capable of expressing prochymosin gene in E. coli host cells are disclosed. A method is described for the preparation of said plasmids which comprises altering the spacing between the SD and ATG sequences within the E. coli trp promoter-operator region of the parent expression plasmid, pCR 701, which is known to express prochymosin gene in the E. coli host cells. These modified expression plasmids are designed to provide high expression levels of prochymosin.

Abstract: Cultivation of microorganisms is controlled by measuring a pressure in a cultivation tank, a flow rate of effluent gas from the cultivation tank, and a concentration of carbon dioxide gas in the effluent gas, calculating a partial pressure of carbon dioxide gas in the cultivation tank and an amount of a carbon dioxide gas produced by the microorganisms, calculating an amount of propagated microorganism cells from the resulting partial pressure of carbon dioxide gas and the amount of produced carbon dioxide gas, thereby calculating an amount of microorganism cells in culture liquor, and supplying a substrate in an amount controlled in accordance with the resulting amount of microorganism cells in culture liquor.Microorganisms can be cultivated in high yield and at a high product concentration.

Abstract: The invention relates to an improvement of the floc-formation property of activated sludge contained in waste water.A waste water treatment process comprises steps culturing a novel strain-Alcaligenes faecalis HRL-1 - and adding the cultured cells to to-be-treated waste water.

Abstract: The invention relates to an improvement of the floc-formation property of activated sludge contained in waste water.A waste water treatment process comprises steps culturing a novel strain--Alcaligenes faecalis HRL--1--and adding the cultured cells to to-be-treated waste water.

Abstract: Waste water containing organic materials is introduced into an aeration tank, and is subjected to aeration treatment in the presence of activated sludge, while supplying oxygen to the aeration tank. The tank provided with an air diffusion pipe at the bottom of the tank, an air dispersion device above the air diffusion pipe and a plurality of inside cylinders above the air dispersion device. An overall circulating stream and partial circulating streams are generated in the aeration tank.

Abstract: Waste water containing organic materials is introduced into an aeration tank, and is subjected to aeration treatment in the presence of activated sludge, while supplying oxygen to the aeration tank. The organic materials contained in the waste water are oxidized by high-efficient activated sludge at a high oxygen transfer rate of 5 to 80 mmol O.sub.2 /l.multidot.hr to the aeration tank.

Abstract: Proteins contained in microbial cells, for example, cells of petroleum-assimilable yeast, are separated and purified by extracting proteins from microbial cells, treating the resulting extract solution with a cation exchanger, treating said cation exchanger containing the adsorbed proteins with a volatile basic substance in the presence of water thereby to desorb or elute the adsorbed proteins, removing said basic substance dissolved in the resulting eluate by evaporation, and then concentrating the eluate thereby to obtain the dissolved proteins.

Abstract: A net-shaped outer blade for reciprocating type electric shaver having an improved new pattern of hair inlet holes is provided. In a metal lamina as the outer blade body, a number of hair inlet holes including slit-shaped and round-shaped types is formed between adjacent ones of a plurality of ribs which are spaced at a proper interval with continuously varying spacing. The length dimension of the hair inlet holes is varied thus depending on the varying spacing between the ribs, and their lengthwise direction is made the same with each other. The area of the respective holes is advantageously made substantially equal to one another.