Dried powder of microorganisms and method for producing same
Provided is a dried powder of microorganisms, which is highly suitable for processing and has excellent usefulness as one component of various products. The present invention provides: a dried powder of microorganisms, the dried powder exhibiting a brightness of 55 or more and a chromaticness of 18 or less; and a method for producing a dried powder of microorganisms, the method comprising: washing microorganisms at least once with a liquid having an osmotic pressure lower than that of a liquid culture medium for culturing the microorganisms; and drying and heating the microorganisms after the washing to thereby obtain the dried powder of the microorganisms, which exhibits a brightness of 55 or more and a chromaticness of 18 or less.
1. A dry powder of microorganisms having a lightness of not less than 55 and a chroma not greater than 18, wherein the microorganisms are at least one species in the clade Stramenopiles or in the class Labyrinthulea.
2. The dry powder according to claim 1 , having a lightness of not less than 58 and a chroma not greater than 18.
3. The dry powder according to claim 1 , having a lightness of not less than 58 and a chroma not greater than 17.
4. The dry powder according to claim 1 , having a lightness of not less than 60 and a chroma not greater than 15.
5. The dry powder according to claim 1 , wherein the microorganisms are oil/lipid-producing microorganisms.
6. A dry powder production method of producing the dry powder of microorganisms of claim 1 , the method comprising:
a) washing the microorganisms at least once using a liquid having a lower osmotic pressure than a liquid medium for culturing the microorganisms; and
b) heating and drying of the microorganisms after the washing to obtain a dry powder of microorganisms, the dry powder having a lightness of not less than 55 and a chroma of not greater than 18.
7. The production method according to claim 6 , further comprising an autoclaving step.
8. The production method according to claim 7 , comprising the autoclaving step after the washing.
9. The production method according to claim 6 , wherein the washing is performed from one to three times.
10. The production method according to claim 6 , wherein the method further comprises a culturing step for culturing the microorganisms before the washing.
11. The production method according to claim 6 , wherein the microorganisms are oil/lipid-producing microorganisms.
12. A powder product comprising the dry powder described in claim 1 .