Abstract: There are provided a reflective photomask and a reflective photomask blank having a high contrast of a minute pattern to an inspection light and capable of minimizing the shadowing effect in EUV exposure. A reflective photomask blank (100) of this embodiment includes: a substrate (11); a reflective part (17); and a low reflective part (18), in which the low reflective part (18) is a multi-layer structural body having at least two or more layers including an absorption layer (14) and an outermost layer (15), an extinction coefficient k to a wavelength of 13.5 nm of the absorption layer (14) is k>0.041, and the film thickness of the low reflective part (18) is a film thickness satisfying 0.5×da+dc?21.5 nm or a film thickness satisfying 0.5×da+dc?27.5 nm, wherein the film thickness of the absorption layer (14) is da and the film thickness of the outermost layer (15) is dc.

Abstract: There is provided a reflective photomask blank capable of suppressing or reducing the shadowing effect of a reflective photomask for patterning transfer using a light having a wavelength in the extreme ultraviolet region as a light source and sufficiently having heat resistance in exposure. The reflective photomask blank is configured to have a substrate 1, a reflective layer 2 including a multi-layer film formed on the substrate 1, and an absorption layer 4 formed on the reflective layer 2. The absorption layer 4 contains a total of 50 at % or more of indium (In) and nitrogen (N). The atomic number ratio (N/In) of nitrogen (N) to indium (In) in the absorption layer 4 is set to 0.5 or more and 1.5 or less. The layer thickness of the absorption layer 4 is set to 17 nm or more and 45 nm or less.

Abstract: The present invention provides a lactic acid bacteria-containing composition comprising a Lactobacillus delbrueckii and a Streptococcus thermophilus.

Abstract: The present invention provides a lactic acid bacteria starter comprising: Streptococcus thermophilus; and a lactic acid bacterium of the Lactobacillaceae other than Lactobacillus delbrueckii.

Abstract: The present invention provides a method for producing a fermented food, comprising: a fermentation step of fermenting a raw material milk-containing milk preparation solution added with Lactobacillus delbrueckii and Streptococcus thermophilus carrying a prtS gene.

Abstract: The present invention provides a method for producing a fermented food, comprising: a fermentation step of fermenting a raw material milk-containing milk preparation solution added with Lactobacillus delbrueckii and Streptococcus thermophilus carrying a prtS gene.

Abstract: The present invention provides a method for producing a fermented food, comprising: a fermentation step of fermenting a raw material milk-containing milk preparation solution added with Lactobacillus delbrueckii and Streptococcus thermophilus carrying a prtS gene.