1. Oil spills that contaminate the soil around petrol stations could soon be cleaned up more easily using sound waves.

1. Researchers have been trying out sound waves to break up the droplets containing these heavier fractions so they can be washed out.
2. The longer, heaver hydrocarbon chains often stay trapped in large droplets between the grains of soil.
3. Techniques that can clean the soil in situ tend to remove only the shorter hydrocarbon chains, which are more soluble in ground water.
4. At the moment, the dirty soil must be dug up and replaced.

6. Initial results show that this may provide an effective solution to the problem.

1. As far as the mere matter of size is concerned, the one-celled individual has a supply of nourishment provided by the mother.

1. He takes in nourishment and proceeds to grow and divide into two cells four, eight and so on upto an enormous number of cells.
2. But the remarkable thing is not so much the number as the variety of these cells.
3. Some are muscle cells, some nerve cells, some skin cells, some bone cells.
4. Yet they all descended from the same fertilized ovum and they all have the same assortment of chromosomes and genes.

6. Since all these cells have the same heredity, they must differ because of different stimulation received from their respective environments.

1. Some personality traits can be measured objectively by tests but the real motive administering the test must, sometimes, be concealed.

1. Give the subject a task without time-limit and note how long he sticks to it.
2. Here, too, some concealment is necessary, for if the subjects understand that persistence is the only point at issue, they may wear out the experimenter.
3. Tasks found useful in persistence tests include the building of as many words as possible from the letters of a given word, etc.
4. Persistence, it would seem must be an easy trait to test objectively.

6. Any single task brings in other factors besides pure persistence but a battery of tests in measure persistence rather well.

1. Sir Hugo was a wealthy owner of one of the country banks, affectionately called by the people as ‘Bond’s Bank’.

1. Unfortunately, his ever rising popularity went to his head and he wanted to retain the universal esteem he enjoyed, by continuing to be ‘Lord Bountiful’ for ever.
2. It made ‘mints of money’ and was believed to be indestructible and was often likened with the Bank of England.
3. Sir Hugo Bond was a great philanthropist too and contributed to every worthwhile charity, which were promptly named after him.
4. There was the Bond Library, the Bond hospital and so on.

6. The trouble was that he had run out of money and he had only two options left; either stop being a guardian angle or use other people’s money.

1. All along we have been given to understand that deserts are burning hot and lifeless places.

1. So there I was along with my camera at about an unearthly 0525 hours to settle into the ‘hide’, long before the birds could get an idea of my presence.
2. Temperatures can hover between frost and 4º in the twilight hours.
3. Besides, there is an incredible array of wild life.
4. But in the desert, much against expectations, it can get awfully cold, especially during winters.

6. I was in the enclosure area of the desert national park in the Jaisalmer district of Rajasthan.