Duloxetine is also sometimes used to treat stress urinary incontinence (leakage of urine during physical activity such as coughing, sneezing, laughing, and exercise) in women. Talk to your doctor about using this medication to treat your condition.
Water's density maximum is a product of the same phenomenon. Close to the freezing point, the water molecules start to arrange locally into ice-like structures. This creates some openness in the liquid water, which tends to decrease its density.
The seed can be any impurity in the water for ice crystals to grow. The container holding the water is also a factor in the freezing of water. Other factors that influence water freezing include density, pressure, movement and other dissolved solids. Not all water will turn into ice at 0 degrees Celsius. In some cases, water can cool down to 40 below.