Dither is an intentionally applied form of noise used to randomize quantization error, preventing large-scale patterns such as color banding in images. Dither is routinely used in processing of both digital audio and digital video data, and is often one of the last stages of audio production to compact disc.
Hepatic porphyria. Hepatic porphyrias is a form of porphyria in which the enzyme deficiency occurs in the liver. Examples include (in order of synthesis pathway): Acute intermittent porphyria. Porphyria cutanea tarda and Hepatoerythropoietic porphyria.
Poria Cocos. Poria cocos may be called Poria, Tuckahoe, Indian bread or Fu-Ling in Chinese. Poria cocos is a mushroom which is used in traditional Chinese medicine and has been widely accepted in modern medicine as a treatment for inflammation and as a central nervous system depressant. Poria cocos looks like a potato that may be seen growing in pine tree roots and dead barks.