公开(公告)号：US20190223397A1

公开(公告)日：2019-07-25

申请号：US16329328

申请日：2017-08-17

Applicant: SHOWA DENKO K.K.

Inventor： Yoko MATSUMOTO ,  Masaharu ISHIKURA ,  Hiroshi SUZUKI

IPC: A01G33/00 ,  C12N1/12 ,  C12M1/00

Abstract: The present invention provides a method for culturing photosynthetic microalgae with which xanthophyll can be obtained more efficiently than before. The method for culturing photosynthetic microalgae of the present invention comprises: step (A) of increasing the number of cells in which light irradiation (a) of encysted photosynthetic microalgae containing xanthophyll is performed; and step (B) of increasing the xanthophyll content in photosynthetic microalgae in which light irradiation (b) of the photosynthetic microalgae subjected to the step (A) of increasing the number of cells is performed, wherein the light irradiation (a) is light irradiation using as a light source an LED including blue light having a wavelength of 400 to 490 nm, the light irradiation (b) is light irradiation using as a light source an LED including blue light having a wavelength of 400 to 490 nm and an LED including red light having a wavelength of 620 to 690 nm, and the light irradiation (a) and the light irradiation (b) are light irradiations using different light sources.

公开(公告)号：US20210185936A1

公开(公告)日：2021-06-24

申请号：US17080379

申请日：2020-10-26

Applicant: SHOWA DENKO K.K.

Inventor： Fumihiko ANDO ,  Yao JU ,  Noriko OHTAKE ,  Shinji YAMAKI ,  Masaharu ISHIKURA

IPC: A01G7/04 ,  A01G22/15 ,  H05B47/155 ,  H05B47/16

Abstract: A plant cultivation device and the like capable of growing a plant while preventing leaves thereof from curling are provided. The device includes: a first illumination irradiating the plant to be cultivated with blue light; a second illumination irradiating the plant with red light; and a controller controlling irradiation of the blue light from the first illumination and irradiation of the red light from the second illumination, wherein the controller controls the blue light irradiation to be performed 21 hours or more a day including a case in which the blue light irradiation is performed 5 hours or more without performing the red light irradiation, and the red light irradiation to be performed 12 hours or more a day.

公开(公告)号：US20190194598A1

公开(公告)日：2019-06-27

申请号：US16329483

申请日：2017-08-17

Applicant: SHOWA DENKO K.K.

Inventor： Yoko MATSUMOTO ,  Masaharu ISHIKURA ,  Hiroshi SUZUKI

IPC: C12N1/12 ,  C12P23/00 ,  A01G33/00 ,  A01G7/04

CPC classification number: C12N1/12 ,  A01G7/045 ,  A01G33/00 ,  C12P7/26 ,  C12P23/00

Abstract: The present invention provides a method for culturing photosynthetic microalgae with which xanthophyll can be obtained more efficiently than before. The culture method of the present invention comprises a step of performing light irradiation of encysted photosynthetic microalgae containing xanthophyll in an amount of 3 to 9% by mass in terms of a dry mass. Preferably, in the step of performing light irradiation, the xanthophyll content in photosynthetic microalgae is kept at 2% by mass or more in terms of a dry mass. Preferably, the step of performing light irradiation includes step (A) of increasing the number of cells in which light irradiation (a) is performed; and step (B) of increasing the xanthophyll content in photosynthetic microalgae in which light irradiation (b) of the photosynthetic microalgae subjected to the step (A) of increasing the number of cells is performed.