Abstract: A hydroponic system (1) using seawater, wherein seawater (W1) is used for hydroponic cultivation of salt-tolerant plants, including a water supply pump (21) that pumps up, from the sea (S), seawater (W1) having a salinity, a bacteria content and an unwanted matter content are less than or equal to predetermined threshold values; a water tub (30) that stores seawater (W1) pumped up by the water supply pump (21) and accommodates salt-tolerant plants (P) to be cultivated; and a filter (27) that removes bacteria and unwanted matter from the seawater (W1) obtained from the sea (S); wherein the seawater (W1) from which the bacteria and the unwanted matter have been removed by the filter (27) is fed to the water tub (30).

Abstract: The present invention provides a plant cultivation method, which enables plant cultivation under high salinity environment for a long time. A method for hydroponic plant cultivation under high salinity environment, comprising a cultivation step of hydroponically growing a plant with a cultivation solution having a sodium chloride concentration of 1% by mass or more, during which a salt resistance imparting treatment is performed at least once by bringing a salt tolerance imparting agent into contact with at least a part of a root of the plant, thereby maintaining salt tolerance of the plant.

Abstract: The present invention provides a plant cultivation method, which enables plant cultivation under high salinity environment for a long time. A method for hydroponic plant cultivation under high salinity environment, comprising a cultivation step of hydroponically growing a plant with a cultivation solution having a sodium chloride concentration of 1% by mass or more, during which a salt resistance imparting treatment is performed at least once by bringing a salt tolerance imparting agent into contact with at least a part of a root of the plant, thereby maintaining salt tolerance of the plant.

Abstract: A hydroponic system (1) using seawater, wherein seawater (W1) is used for hydroponic cultivation of salt-tolerant plants, including a water supply pump (21) that pumps up, from the sea (S), seawater (W1) having a salinity, a bacteria content and an unwanted matter content are less than or equal to predetermined threshold values; a water tub (30) that stores seawater (W1) pumped up by the water supply pump (21) and accommodates salt-tolerant plants (P) to be cultivated; and a filter (27) that removes bacteria and unwanted matter from the seawater (W1) obtained from the sea (S); wherein the seawater (W1) from which the bacteria and the unwanted matter have been removed by the filter (27) is fed to the water tub (30).

Abstract: A light adjusting sheet for a planar lighting device includes a plurality of convex and concave ridges or regions arranged alternately and approximately parallel to each other on one surface. Each of the convex regions and concave regions are formed by two flat surfaces. The ridges may have a cross section of a sine curve. Another light adjusting sheet consists of a plurality of single sheets each having the above configuration, stacked together. A planar lighting device includes the light adjusting sheet of the above configuration, wherein peak lines of the convex ridges and bottom lines of the concave ridges are arranged to make a predetermined angle with an axis of a linear light source. The liquid crystal display includes a liquid crystal display element placed on front of the planar lighting device of the above configuration.

Abstract: A light adjusting sheet for a planar lighting device includes a plurality of convex and concave streaks arranged alternately and approximately parallel to each other on one surface. The streaks may have a cross section of a sine curve. Another light adjusting sheet consists of a plurality of single sheets each having the above configulation, stacked together. A planar lighting device includes the light adjusting sheet of the above configulation, wherein peak lines of the convex streaks and bottom lines of the concave streaks are arranged to make a predetermined angle with an axis of a linear light source. The liquid crystal display includes a liquid crystal display element placed on front of the planar lighting device of the above configulation.

Abstract: A light adjusting sheet for a planar lighting device includes a plurality of convex and concave streaks arranged alternately and approximately parallel to each other on one surface. The streaks may have a cross section of a sine curve. Another light adjusting sheet consists of a plurality of single sheets each having the above configulation, stacked together. A planar lighting device includes the light adjusting sheet of the above configulation, wherein peak lines of the convex streaks and bottom lines of the concave streaks are arranged to make a predetermined angle with an axis of a linear light source. The liquid crystal display includes a liquid crystal display element placed on front of the planar lighting device of the above configulation.