The electron beam is affected by air and water molecules, so the sample must be placed in a vacuum. The sample must also be conductive to allow the electrons not reflected or absorbed to be conducted away. This gives some limits on the type of sample that can be used. In the case of samples from plants or animals, it often means that they must first be coated in gold before they can be placed in the microscope. This is done in order to preserve the sample and keep it from changing or decaying throughout the scanning process.
The scanning electron microscope is made up of several components:
1. The electron gun is located at the very top or bottom of an SEM and is used to fire a beam of electrons at the object that we are looking at under SEM.
2. The lenses are used to focus electron beams so that we can get clear and detailed images of the examined object. They are not made of glass, but they are made of magnets that change the path of electrons created from the electron gun.
3. The sample chamber is the area where the specimen of interest is examined under SEM. As the technique is very sensitive, the chamber must be very sturdy and have no vibrations happen. This is to allow for the specimen to be kept very still in order for the SEM to produce good images.
4. The detector is the "eyes" of the microscope. It is able to produce the most detailed images of a specimen's surface. Many different detectors can be used depending upon the information wanted from the sample used.
5. The vacuum chamber is used to keep the electron beam from constant interference from air. The air particles are bad for electron beams in that the electrons would be knocked out of the air and onto the specimen, which will produce bad distorted surfaces of the specimen.
Leporidae
Leporidae is a mammal family in the order Lagomorpha. It has about 60 species of rabbits and hares. The animals of the family Leporidae are called Leporids. The names "rabbit" and "hare" are not names of separate biological groups, but are "randomly" given to different leporid species.
Casimir III of Poland
Casimir III the Great () (April 30, 1310 – November 5, 1370) was the King of Poland from 1333 until 1370. He was the son of Wladyslaw I the Short. He was the last king of the Piast dynasty, his daughter Jadwiga having married the Lithuanian duke Wladyslaw Jagiello.
Casimir III is the only Polish king to ever receive the title of "the Great". His reign was a time of prosperity and growth for the Polish kingdom. He focused on the economy and strengthening of the country and not on wars and expansion. He kept peace with the Teutonic Order during his reign, for he knew that Poland was weak and would not survive the confrontation with the knights. Because of that, he focused his attention on the south-eastern borders of the country and expanded there. In 1340, he conquered Red Ruthenia (Lviv along with it) from Hungary. Various trade laws created by him made it easier for Polish cities to gather more wealth. Cracow and Lviv gained in importance during his reign.
Thunbergia
Thunbergia Retz. is a genus of flowering plants in the family Acanthaceae, native to tropical regions of Africa, Madagascar and southern Asia. Its members are known by various names, including thunbergias; clockvine on its own usually refers to "Thunbergia grandiflora", while "Thunbergia alata" is often known as Black-eyed Susan vine or just Black-eyed Susan (not to be confused with other flowers called Black-eyed Susan). Orange clockvine is the name of "Thunbergia gregorii".
Thunbergia was named for Carl Peter Thunberg.
The Pillows
The Pillows (or the pillows) is a Japanese rock band made in 1989. They sang FLCL's theme song.
Rio Negro (Amazon)
The Rio Negro is a river which flows through the Amazon rainforest in north-western Brazil, in the state of Amazonas.
It is the largest blackwater river in the world. It is called "Negro" (Spanish and Portuguese for "black") because its waters are colored by particles of humus, which make them look much like tea.
The Rio Negro is the largest tributary of the Amazon on the left-hand side (as it goes towards the sea). It starts in Colombia and ends in the Amazon basin.
Rio Negro has a very high species richness. About 700 fish species have been documented in the river basin, and it is estimated that the total is 800–900 fish species, including almost 100 endemics and several undescribed species. Among these are many that are important in the aquarium trade, including the cardinal tetra.
Castella
Castella ("Kasutera" in Japanese) is a sponge cake produced in Japan. It is made of sugar, flour, eggs, and starch syrup, very common at festivals and as a street food.
It was originally produced in Portugal during medieval times, and when the Portuguese reached Japan they gave some of it to the Japanese nobility. The name is derived from Portuguese "Pão de Castela" which means "bread of Spain".
Mallow, County Cork
Mallow (Irish "Mala" "plain of the rock") is the "Crossroads of Munster" and the administrative capital of north County Cork, in the Republic of Ireland. The Northern Divisional Offices of Cork County Council are in the town.
List of Gumby episodes
This list displays the 7 pilot and all 233 episodes of "Gumby".
Krishnadevaraya
Sri Krishnadevaraya (, , 1509-1529 CE) was the most famous king of Vijayanagara Empire. He ruled the Vijayangara empire at the most important time. He is considered to be one of the great kings of India. Emperor Krishnadevaraya also earned the titles "Kannada Rajya Rama Ramana (ಕನ್ನಡರಾಜ್ಯರಮಾರಮಣ)", "Moorurayaraganda (ಮೂರುರಾಯರಗಂಡ)" (what means "King of three kings") and "Andhra Bhoja (ఆంధ్రభోజ)". Much of our information about his reign comes from the accounts of Portuguese travelers Domingos Paes and Nuniz. King krishnadeva Ray and was the 3rd and the greatest ruler of the Tulava empire
Paes describes the king's attitude to law and order by the sentence, "The king maintains the law by killing." Offences against property (designed to maintain stability) and for murder ranged from cutting of a foot and hand for theft and beheading for murder (except for those occurring as a result of duel). Paes could not estimate the size of Vijaynagar as his view was obscured by the hills but estimated the city to be at least as large as Rome. Furthermore, he considered Vijaynagar to be "the best provided city in the world" with a population of not less than a half a million.
Paes praises Krishnadevaraya as, “the most feared and perfect King… a great ruler and a man of much justice”.
The rule of Krishnadevaraya was an age of good literature in many languages. But it is known as a golden age of Telugu literature. Many Telugu, Sanskrit, Kannada and Tamil poets enjoyed the patronage of the emperor. Emperor Krishnadevaraya was fluent in many languages.
Tocantins River
The Tocantins River is a river that flows through the northeastern part of Brazil. It rises in the district with a lot of mountains known as the Pireneus. These can be found to the west of the Federal District. Its western tributary, the Araguaia River, has headwaters very far south on the slopes of the Serra dos Caiapós.
Bukka
Bukka ಬುಕ್ಕ್ (1356-1377 CE) (also known as Bukka Raya I was an emperor of the Vijayanagara Empire from the Sangama Dynasty. Bukka patronised Telugu poet Nachana Soma.
It is said that Bukka also sent a mission to China during his reign.
Important works of literature were also written during his rule. Dozens of scholars lived under the guidance of Vidyaranya and Sayana. Sayana's commentary on the Vedas, Brahmanas and Aranyakas was written under the patronage of Bukka.
McGill University
McGill University or just McGill is an English language university in Montreal, Canada. It was created in 1821, few years before the country Canada existed. McGill University ranks first in Canada for 16 consecutive years according to Maclean's University Rankings.
Renault Koleos