The present invention relates to biologically active material, containing mainly polysaccharides, from the solution culturing for mycelium of Antrodia camphorata, a kind of mushroom that only grows inside a unique Taiwanese plant called Cinnamomum kanehirae tree, being able to improve immunity and resist tumors and parasites, and the preparation and compositions for the said active material. The damper comprises a fluid chamber having a piston dividing the chamber into a compression and rebound sides, a reservoir in fluid communication with the compression side of the chamber, and an isolator disposed between the compression side and the reservoir, whereby the isolator obstructs fluid flow between the compression side and the reservoir. The diamond layers may be homoepitaxial, polycrystalline, nanocrystalline or ultrananocrystalline in various combinations.