Author Archive

Maya Angelou (1928-2014)

Maya Angelou

Maya Angelou

Maya Angelou was born Marguerite Annie Johnson in 1928 in St. Louis, Missouri. Her parents divorced when she was only three and she was sent with her younger brother Bailey to live with their grandmother in the small town of Stamps, Arkansas. In Stamps, the young girl experienced the racial discrimination that was the legally enforced way of life in the American South, but she also absorbed the deep religious faith and old-fashioned courtesy of traditional African American life. She credits her grandmother and her extended family with instilling in her

You need to login to view the rest of the content. Please . Not a Member? Join Us
Birgit

Nuclear Reactor

Nuclear Reactor

Nuclear Reactor

Nuclear power provides about 20% of the US electricity supply. To understand how it works we need to understand the nucleus of an atom.

We tend to think of atoms as solid balls linked together with chemical bonds forming molecules. The reality is that the “hard” shell that represents an atom is a representation of the electron that is whizzing around the central placed nucleus. The “solid” ball is a poor representation; instead think of a ping-pong ball. Most of the ball is empty; in the case of an atom the shell(s) (mass of electrons) does not contribute much to the mass, as electrons are very low in mass. The bulk of the weight is in the nucleus where the proton(s) and neutron(s) reside.

You need to login to view the rest of the content. Please . Not a Member? Join Us
Birgit

Fruits as Source of Vitamins

fruits

fruits

Fruits are a source of many essential vitamins and nutrients, besides being loved for their delightful taste. They contain many important vitamins required for carrying out biochemical reactions crucial for human growth and development. Let’s find out some fruits exuberant with vitamins, which play a significant role in life-sustaining processes.

Vitamins in Fruits

Vitamin A
Orange, watermelon, blackberry, peach, kiwi and apple are some of the fruits rich in vitamin A. This vitamin plays a crucial role in cell reproduction and formation of hormones. It is also essential for the stimulation of immune system and improvement of vision and hair growth. Vitamin A also promotes proper growth and development of bones and teeth. Deficiency of this important vitamin can trigger diseases like, night blindness, dryness of skin, weak bone and teeth.

You need to login to view the rest of the content. Please . Not a Member? Join Us
Birgit

Catastrophic Earthquake, Tsunami and Nuclear Crisis in Japan

Earthquake, tsunami and nuclear crisis in Japan

Earthquake, tsunami and nuclear crisis in Japan

On March 11, 2011, an earthquake struck off the coast of Japan, churning up a devastating tsunami that swept over cities and farmland in the northern part of the country and set off warnings as far away the west coast of the United States and South America. Recorded as 9.0 on the Richter scale, it was the most powerful quake ever to hit the country. As the nation struggled with a rescue effort, it also faced the worst nuclear emergency since Chernobyl; explosions and leaks of radioactive gas took place in three reactors at the Fukushima Daiichi Nuclear Power Station that suffered partial meltdowns, while spent fuel rods at another reactor overheated and caught fire, releasing radioactive material directly into the atmosphere. Japanese officials turned to increasingly desperate measures, while their American counterparts gave a far more dire appraisal of the dangers.

You need to login to view the rest of the content. Please . Not a Member? Join Us
Birgit

Kora – African Music Instrument

kora

kora

A kora is built from a large calabash cut in half and covered with cow skin to make a resonator, and has a notched bridge like a lute or guitar. The sound of a kora resembles that of a harp, though when played in the traditional style, it bears a closer resemblance to flamenco and delta blues guitar techniques.

You need to login to view the rest of the content. Please . Not a Member? Join Us
Birgit