The change in hair color occurs when melanin ceases to be produced in the hair root and new hairs grow in without pigment. The stem cells at the base of hair follicles produce melanocytes, the cells that produce and store pigment in hair and skin. The death of the melanocyte stem cells causes the onset of graying.
The revenue cycle is a recurring set of business activities and related information processing operations associated with providing goods and services to customers and collecting their cash payments.The primary external exchange of information is with customers.he revenue cycle is a recurring set of business activities and related information processing operations associated with providing goods and services to customers and collecting their cash payments.
A duty cycle is the percentage of one period in which a signal is active. A period is the time it takes for a signal to complete an on-and-off cycle.As a formula, a duty cycle may be expressed as:where is the duty cycle, is the time the signal is active, and is the total period of the signal.Thus, a 60% duty cycle means the signal is on 60% of the time but off 40% of the time. The on time for a 60% duty cycle could be a fraction of a second, a day, or even a week, depending on the length of the period.here is the duty cycle, is the time the signal is active, and is the total period of the signal. Thus, a 60% duty cycle means the signal is on 60% of the time but off 40% of the time. The on time for a 60% duty cycle could be a fraction of a second, a day, or even a week, depending on the length of the period.