Abstract: A method and apparatus for determining the stability of arc welding between a base metal and a welding electrode. A welding current for the arc period and a welding current for the short-circuit period fed from a welding power source are sampled every cycle of the repetition of arc and short-circuit, in accordance with a predetermined sampling frequency. The welding current for the arc period is integrated, and a standard deviation of the integrated welding current for the arc period is calculated. The standard deviation of the integrated welding current for the short-circuit period is calculated, as well. These standard deviations are multiplied together to produce a product, so that a welding stability parameter is calculated on the basis of the product. Then, the welding stability parameter is compared with a predetermined reference value. In response to the result of comparison, the welding stability between the base metal and the welding electrode is determined.

Abstract: A simplified process is provided for producing saccharides of definite chain length, such as glucose, maltose and maltooligosaccharides, each in an isolated state and with a high purity.The process comprises transferring a saccharide chain, using a saccharide chain transferase, from a saccharide chain source to a substance substantially separable from the saccharides mentioned above and treating the thus-obtained oligosaccharide with an enzyme capable of excising the saccharide chain of definite chain length in an exo manner.

Abstract: The present invention relates to stabilizing agents for enzymes which comprises an enzyme stabilizing amount of an N-substituted moranoline derivative of the formula (III): ##STR1## wherein R.sup.1 is phenyl lower alkynyl, phenoxy lower alkenyl or phenoxy lower alkynyl, wherein the phenyl moiety is unsubstituted, or a glucose oligomer thereof.

Abstract: A method of preparing crystals of a glucosylmoranoline formula (III) ##STR1## wherein R is hydrogen or lower alkyl by fractional cyrstallizatin using a polar solvent and an arylsulfonic acid.

Abstract: A heat-sensitive recording material which comprises a heat-sensitive recording layer and a substrate, the substrate having as a constituent element a synthetic resin film layer containing minute cavities and a content of cavities in the synthetic resin film layer being 40 to 100 cc/100 g. The heat-sensitive recording material has excellent resolution and gives a clear recorded image having a high density even with low printing energy.