Its structure took years to work out. Max Perutz and John Kendrew worked out the structure of myoglobin first. That muscle globin is smaller, with only one heme group.
Cornea
The cornea is the front part of the eye. It is the clear transparent section of the eye. The cornea covers the iris, pupil, and the eye chamber. It is a special form of tissue. The cornea is clear and has no blood vessels. It has nerves, but with no myelin sheaths on them.
The cornea, with the lens, refracts light. The cornea and the lens bend light so the image strikes the retina. The cornea does about two-thirds of this refraction.
Dua's layer is a newly discovered layer of the cornea. It was described in June 2013. It is the sixth layer of the cornea to be discovered. Despite its thinness, the layer is very strong, and air does not get through it.
WASSCE
The West African Senior School Certificate Examination (WASSCE) is a type of exam in West Africa. It is made by the West African Examinations Council (WAEC). It is only given to students who live in the five English-speaking West African countries: Nigeria, Ghana, Sierra Leone, The Gambia and Liberia
There are two different types of the exam:
The grades below are given on the WASSCE certificates for the students who finished their exams. They also depend on how well the students did in their exams.
Sergei Prokofiev
Sergei Sergeyevich Prokofiev () (born Sontsovka, Ukraine 23 April 1891; died Moscow 5 March 1953) was a Russian composer and pianist who came from Ukraine. During his lifetime, Ukraine was part of Russia. Together with Dmitri Shostakovich he is one of the greatest Russian composers of the 20th century. Children all over the world love to listen to his musical story "Peter and the Wolf" and the music for "Lieutenant Kije", but he wrote many other great works including symphonies, concertos, piano sonatas, ballets and operas.
Prokofiev was born into an educated family, and his mother recognized very early her son's musical gifts. His father was a college-educated agronomist who managed the farm-site of his employer in the Ukrainian steppe. His mother played the piano reasonably well in her son's opinion. The young Sergei started composing at a very early age. By the time he was eleven he had written two operas and a series of small piano pieces he would later call "little puppies". Soon he was writing music with unusual time signatures and in unusual changes of key.
Prokofiev's formal musical education began when, as a young boy, he started taking lessons from Reinhold Glière. In 1904 he went to study at the Conservatory in St Petersburg. He was a brilliant student, but he often disagreed with the way the professors were teaching. He was bored with the lessons in orchestration from Rimsky-Korsakov and the counterpoint lessons from Liadov although he could have learned more from these great men. His main friends were the composers Nikolai Myaskovsky and Boris Asafiev. He often showed them his latest piano compositions which sounded very modern. Many of St. Petersburg's newspaper critics did not like his music, while others felt he showed great promise and was sure to be a "futurist".
Prokofiev spent the summer of 1909 back at home in the small Russian farming village of Sontsovka in what is now Ukraine where his father was an estate manager. He worked in a way that was to be typical of him all his life: he carefully kept a diary until the middle 1930s, was an excellent chess player and writer, kept making changes to a number of his earlier works. He often borrowed music from one composition and put it in another, or used unfinished works in new compositions.
When he returned to St Petersburg he took piano lessons from a teacher at the St. Petersburg Conservatory called Anna Esipova. She worked hard to discipline him in his playing although he did not appreciate her efforts. He also took conducting lessons from Nikolai Tcherepnin who taught him to like late-Romantic composers such as Scriabin and Debussy. He wrote some music himself in this style, but most of the music he wrote at this time sounded very harsh and dissonant and, although he was becoming quite famous, many people hated it. When he finished his studies at the Conservatoire he won its top prize (the Rubinstein Prize) with his "First Piano Concerto", although the examiners had found it hard to agree and Rimsky-Korsakov said that Prokofiev was "gifted but immature".
Prokofiev travelled to London where he met many famous people including Diaghilev who had a very skilled ballet group called Ballets Russes. The composer Igor Stravinsky had been writing ballet music for Diaghilev’s dancers. Prokofiev particularly loved Stravinsky’s "Rite of Spring" and it influenced his music. He wrote an opera "The Gambler" based on the novel by Brusilov but the singers and the orchestra did not understand his music and refused to perform it. One of the first works of Prokofiev to become known all over the world was his First Symphony known as the "Classical Symphony". He made the music sound like that of composers from the Classical period such as Haydn. This symphony is still very popular today.
He composed the music in peter and the wolf
In 1917 the Russian Revolution took place. The country was in a chaotic state so Prokofiev went to the United States. After a journey which took four months via the Transsiberian railway, Tokyo and San Francisco, he arrived in New York. His first real success came from his connections with Cyrus McCormik in Chicago. His first major commission was the opera "The Love for Three Oranges" for the Chicago Lyric Opera. It was popular in Chicago but not in New York City where he really wanted to make his reputation. He soon traveled to Paris to see Diagalev again whom he had met earlier in London. His first ballet for him was "Ala and Lolly" which Diagalev did not like and would not perform. This ballet later became Prokofiev's "Scythian Suite". His next ballet was more successful, "The Tale of the Buffoon". He also wrote his "Third Piano Concerto" which is his most popular concerto for piano. Prokofiev lived off and on in Paris for fourteen years, but he often went on tour, performing his works on the piano. In 1928 his "Third Symphony" was first performed, much of which was based on music from his opera " The Fiery Angel" which was never performed completely in his lifetime. In the late-1920s he was invited back to Russia. Although many Soviet people tried to persuade him to stay there he decided to remain in the West where he was starting to have a very successful career. It was not until 1936 that he finally decided to move back to Russia. Life was not easy in the Soviet Union for all types of creative people such as musicians, poets, writers and film makers. Composers were expected to write music which would make ordinary people happy and make them feel proud of their country and of the communist revolution. Any music that did not do this was called “decadent” or “formalist”. Many artists where punished for creating works that did not do what the socialist politicians expected of them. Prokofiev had never been interested in politics, and he thought the politicians would leave him in peace so that he could write the kind of music he liked.