Doppler echocardiography. Doppler echocardiography is a procedure that uses ultrasound technology to examine the heart or blood vessels. An echocardiogram uses high frequency sound waves to create an image of the heart while the use of Doppler technology allows determination of the speed and direction of blood flow by utilizing the Doppler effect.
Confidence votes 35. Watermelons are thought to be indigious to Africa where they have been found growing wild. In the 1600s there were watermelon growers in Massachusetts and Florida. Watermelons can be grown almost anywhere but do best in humid areas.I have a freind in Montrael who grows watermelons.He uses black plastic on the ground to amplify the suns heat.n the 1600s there were watermelon growers in Massachusetts and Florida. Watermelons can be grown almost anywhere but do best in humid areas. I have a freind in Montrael who grows watermelons. He uses black plastic on the ground to amplify the suns heat.
All seedless watermelons are hybrids and take the longest time to mature. The seeds germinate between seven and 14 days and they must be kept between 75 and 85 degrees. It's also necessary to plant seedless watermelons next to seeded watermelons, as the hybrid varieties need a pollinator.or a healthy seedling to sprout, watermelon seeds must be planted in temperatures between 70 and 95 degrees. Position the seeds no more than 5 feet away from each other, so the seedlings have room to mature into large fruit.