Abstract: An infrared gas burner plate of the type in which a sintered plate body formed of a heat resisting material is provided at its front surface with a plurality of grooves crossing one another to define a plurality of intercepting portions and a plurality of convex portions, the plate body being additionally provided with a plurality of burner holes therethrough between the front and rear surfaces thereof and distributed over the grooves and the convex portions. In accordance with the present invention, each of the intersecting groove portions is provided with a small convex portion having the burner hole at its center. More particularly, the small convex portions are frusto-conical in form.

Abstract: A new antibiotic SF-1130-x.sub.3 substance is produced by cultivating a microorganism Streptomyces myxogenes SF-1130 (deposited under FERM-P. 676 and ATCC 31305) in a liquid culture medium under aerobic conditions, and this antibiotic may be isolated from the fermentation broth of said microorganism and is useful as an inhibitor to .alpha.-glucosidase and saccharase. Besides, this antibiotic, when orally given, is useful as a drug for suppressing an elevation in the level of blood sugar in living animals which have taken starch and/or sugars.

Abstract: A chemotherapeutic, antibacterial agent, 7.beta.-[(2D-2-amino-2-carboxy)ethylthioacetamido]-7.alpha.-methoxy-3-[(1- methyl-1H-tetrazole-5-yl)thiomethyl]-3-cephem-4-carboxylic acid is produced economically and efficiently starting from cephamycin A and/or B by a "new route" process comprising the consecutive steps of reaction of cephamycin with 5-mercapto-1-methyl-1H-tetrazole; protection of the terminal amino group thereof by acylation; protection of the two carboxyl groups thereof by esterification; replacement of the acyl group initially having attached to the 7-amino group by a halogenoacetyl group; deprotection of the blocked 4-carboxyl group; and condensation of D-cysteine with the halogenoacetyl group attaching to the 7-amino group.

Abstract: A BN-213 substance-producing strain of the genus Pseudomonas is cultivated to produce BN-213 substance in a culture medium. The BN-213 substance is isolated from the culture medium and purified, and proved to be a novel antibiotic.

Abstract: New antibiotics, SF-2050 substance and SF-2050B substance are produced by cultivating a microorganism Streptomyces sp. SF-2050 now deposited under FERM-P 4358 and under ATCC. 31450 in a liquid culture medium under aerobic conditions, and these antibiotics may be isolated from the fermentation broth and useful as an antibacterial agent. These antibiotics have an activity inhibitory to .beta.-lactamase.