For specialized purposes, a second may be used as a unit of time in time scales where the precise length differs slightly from the SI definition. One such time scale is UT1, a form of universal time.
Sources of insoluble fiber include: 1  whole grain foods. 2  wheat and corn bran. 3  legumes such as beans and peas. 4  nuts and seeds. 5  potato skins. 6  lignans. 7  vegetables such as green beans, cauliflower, zucchini (courgette), celery, and nopal.ources of insoluble fiber include: 1  whole grain foods. 2  wheat and corn bran. 3  legumes such as beans and peas. 4  nuts and seeds. 5  potato skins. 6  lignans. 7  vegetables such as green beans, cauliflower, zucchini (courgette), celery, and nopal.
Celery, corn, salad greens, spinach, peas and green beans are rich in insoluble fiber. These fibrous, chewy vegetables often pass through your digestive tract virtually untouched. You may notice pieces of these vegetables in your stool, since your body is unable to break down the tough insoluble fiber.