Molecular biology chiefly concerns itself with understanding the interactions between the various systems of a cell, including the interrelationship of DNA, RNA and protein biosynthesis and learning how these interactions are regulated.
Researchers in molecular biology use specific techniques that are typical for molecular biology, but they combine these with techniques and ideas from genetics and biochemistry. The following figure is a schematic that shows one possible view of the relationship between the fields:
Uracil
Uracil is a base found in RNA. It pairs with adenine and replaces thymine in DNA. Uracil, a pyrimidine, was originally discovered in 1900.
Double stopping
Double stopping means playing two notes at once on a bowed string instrument by drawing the bow across two strings at once while "stopping" two notes by pressing the fingers down on the fingerboard: one finger on each of the two strings being played.
On instruments such as the violin the player is mostly playing one note at a time. It is not difficult to play two open strings at once, but fingering two strings at once can be very difficult, so double stopping is an advanced technique. Sometimes triple or quadruple stopping is needed. This is sometimes called multiple stopping. It is not really possible to play three or four notes at the same time on a violin. The bridge is curved so that the player can bow on one string without hitting the others by accident. Multiple stopping is done by playing first two strings and then, while still letting the sound from these two ring, quickly playing the other two strings.
Multiple stopping was used a lot in Renaissance music when playing the viol. Baroque composers such as Johann Sebastian Bach in Germany or Arcangelo Corelli in Italy often require double stopping when writing for solo string instruments. It is also used a lot in virtuoso music of composers in the Romantic period such as Niccolò Paganini.
Saar (protectorate)
Saar was the name of the Saarland after World War Two, when it was under French control. It became part of West Germany in 1957.
Law of large numbers
The law of large numbers, or LLN for short, is a theorem from statistics. It states that if a random process is repeatedly observed, then the average of the observed values will be stable in the long run. This means that as the number of observations increases, the average of the observed values will get closer and closer to the expected value.
For example, when rolling dice, the numbers 1, 2, 3, 4, 5 and 6 are possible outcomes. They are all equally likely. The population mean (or "expected value") of the outcomes is:
The following graph shows the results of an experiment of rolls of a die. In this experiment, it can be seen that the average of die rolls varies wildly at first, but as predicted by the LLN, the average stabilizes around the expected value of 3.5 as the number of observations become large.
first described the LLN. He says it was so simple that even the stupidest man instinctively knows it is true. Despite this, it took him over 20 years to develop a good mathematical proof. Once he had found it, he published the proof in "Ars Conjectandi" (The Art of Conjecturing) in 1713. He named this his "golden theorem". It became generally known as "Bernoulli's theorem" (not to be confused with the law in physics with the same name). In 1835, S.D. Poisson further described it under the name "la loi des grands nombres" (the law of large numbers). Thereafter, it was known under both names, but the "law of large numbers" is most frequently used.
Other mathematicians also contributed to make the law better. Some of them were Chebyshev (who proved a more general version of the law for averages), Markov, Borel, Cantelli and Kolmogorov. After these studies, there are now two different forms of the law: One is called the "weak" law, and the other the "strong" law. These forms do not describe different laws. They have different ways to describe the convergence of the observed or measured probability to the actual probability. The strong form of the law implies the weak one.
Hennes &amp; Mauritz
H & M Hennes & Mauritz AB (H&M), is a Swedish clothing company. It sells fast fashion at cheaper prices. The company was created in Västerås, Sweden, in 1947 by Erling Persson. At first, the company only sold women's clothing. At that time, it was called Hennes, Swedish for "hers." In 1968, Persson got the building and inventory of a Stockholm hunting equipment store named Mauritz Widforss. A supply of men's clothing was part of the inventory. This caused Persson to decide to also sell men's clothing. He renamed the store Hennes & Mauritz, later shortened to H&M.
H&M has more than 1500 stores in 28 different countries. It has more than 60,000 employees.
Luchegorsk
Luchegorsk (Russian:Лучегорск, lit. "Ray of mountains") is a urban-type settlement and administrative center of Pozharsky District (Primorsky Krai, Russia). It was founded in 1966. There are 22,365 people living there according to 2002 Census.
Geographical coordinates are 46-27N,134-17E. Luchegorsk is the largest non-city settlement on Russian Far East.
Luchegorsk has more ecological problems for a large electric power station.
In December,1997, a large Amur tiger hunted down a poacher who had shot and wounded the tiger.The tiger killed the man in what appears to be the only (recorded) premeditated act of revenge by a tiger.
The Tell-Tale Heart
"The Tell-Tale Heart" is an 1843 short story by Edgar Allan Poe. Detectives capture a man who admits to the killing of the old man with a strange eye. The murder is carefully planned, and the killer killed the old man's by pulling his bed on top of the man and hiding the body under the floor. The killer feels guilty about the murder, and the guilt makes him imagine that he can hear the dead man's heart still beating under the floor.
No one knows if the old man and the killer are related. Some people think that the old man is a father figure. Some people think that the man is strange, perhaps that his vulture eye represents some sort of veiled secret.
The story was first published in James Russell Lowell's "The Pioneer" in January 1843. "The Tell-Tale Heart" is one of Poe's most famous short stories, and it is widely considered a classic of the Gothic fiction genre. The story has been made into or inspired many different works in film, television, and other media.
"The Tell-Tale Heart" is a story told in the first-person; meaning that the storyteller talks about their own feelings and actions. The story does not say if the narrator is male or female.
The narrator is living with an old man with a clouded, vulture-like eye. The narrator has feelings of paranoia, and becomes afraid of the old man's strange eye. The narrator becomes so bothered by the eye that he plots to murder the old man. For more than a week, the narrator sneaks into the old man's room at night, watching and waiting for the right time to strike. However, the old man's eyes are shut, hiding the clouded eye, and the narrator loses the urge to kill.
One night, though, the old man awakens as the narrator watches, revealing the eye. The narrator strikes, smothering the old man with his own mattress. The narrator chops up the body, and hides the pieces under the floorboards. The narrator then cleans the place up to hide all signs of the crime. When the narrator reports that the police (whether a delusion or real is unclear) respond to a call placed by a neighbor who heard a distressful scream, the narrator invites them to look around, confident that they will not find any evidence of the murder. They sit around the old man's room, right on top of the very hiding place of the dead body, yet suspect nothing.