(See How Catalytic Converters Work for more details.). Controlling the engine is the most processor-intensive job on your car, and the engine control unit (ECU) is the most powerful computer on most cars.
â¢ Accidental poisoning is one of the leading causes of GI ulcer disease. This can be from plants (for example, toxic mushrooms, castor beans, or sago palm), pesticide or rodenticide toxicity, chemical poisoning (often with ethylene glycol or phenol), or heavy metal poisoning involving zinc, iron, or arsenic.
Answer Wiki. I read this somewhere and found it useful. Mouth ulcers can occur due to many reasons like eating acidic and spicy food, poor dental health, biting of one's cheek, food allergies, mouth injuries due to dental procedures, aggressive teeth cleaning, and even nutritional deficiency of vitamin B12 and iron.