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Mongolian Spot
A Mongolian spot, also known as slate grey nevus or congenital dermal melanocytosis, is a benign, flat, congenital birthmark with wavy borders and an irregular shape. In 1883, it was described and named after Mongolians by Erwin Bälz, a German anthropologist based in Japan, who erroneously believed it to be most prevalent among his Mongolian patients. It normally disappears three to five years after birth and almost always by puberty. The most common color is blue, although they can be blue-gray, blue-black or deep brown. Cause Mongolian spot is a congenital developmental condition—that is, one existing from birth—exclusively involving the skin. The blue colour is caused by melanocytes, melanin-containing cells, that are usually located in the surface of the skin (the epidermis), but are in the deeper region (the dermis) in the location of the spot. Usually, as multiple spots or one large patch, it covers one or more of the lumbosacral area (lower back), the buttocks, sides ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dermatology
Dermatology is the branch of medicine dealing with the skin.''Random House Webster's Unabridged Dictionary.'' Random House, Inc. 2001. Page 537. . It is a speciality with both medical and surgical aspects. A dermatologist is a specialist medical doctor who manages diseases related to skin, hair, nails, and some cosmetic problems. Etymology Attested in English in 1819, the word "dermatology" derives from the Greek δέρματος (''dermatos''), genitive of δέρμα (''derma''), "skin" (itself from δέρω ''dero'', "to flay") and -λογία '' -logia''. Neo-Latin ''dermatologia'' was coined in 1630, an anatomical term with various French and German uses attested from the 1730s. History In 1708, the first great school of dermatology became a reality at the famous Hôpital Saint-Louis in Paris, and the first textbooks (Willan's, 1798–1808) and atlases ( Alibert's, 1806–1816) appeared in print around the same time.Freedberg, et al. (2003). ''Fitzpatrick's Dermatology in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human Embryogenesis
Human embryonic development, or human embryogenesis, is the development and formation of the human embryo. It is characterised by the processes of cell division and cellular differentiation of the embryo that occurs during the early stages of development. In biological terms, the development of the human body entails growth from a one-celled zygote to an adult human being. Fertilization occurs when the sperm cell successfully enters and fuses with an egg cell (ovum). The genetic material of the sperm and egg then combine to form the single cell zygote and the germinal stage of development commences. Embryonic development in the human, covers the first eight weeks of development; at the beginning of the ninth week the embryo is termed a fetus. Human embryology is the study of this development during the first eight weeks after fertilization. The normal period of gestation (pregnancy) is about nine months or 40 weeks. The germinal stage refers to the time from fertilization throu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bethel, Alaska
Bethel ( esu, Mamterilleq) is a city in Bethel Census Area, Alaska, United States. It is the largest community on the Kuskokwim River, located approximately upriver from where the river flows into Kuskokwim Bay. It is also the largest city in western Alaska and in the Unorganized Borough, as well as the eighth-largest in the state. Bethel has a population of 6,325 as of the 2020 census, up from 6,080 in 2010. Annual events in Bethel include the Kuskokwim 300, a dogsled race; Camai, a Yup'ik dance festival held each spring; and the Bethel Fair held in August. History Southwestern Alaska has been the homelands of Yup'ik peoples and their ancestors for thousands of years. The residents of what became Bethel were called the Mamterillermiut, meaning "Smokehouse People", after their nearby fish smokehouse. In the late 19th century, the Alaska Commercial Company established a trading post in the town, called Mumtrekhlogamute, which had a population of 41 people by the 1880 US Cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fridtjof Nansen
Fridtjof Wedel-Jarlsberg Nansen (; 10 October 186113 May 1930) was a Norwegian polymath and Nobel Peace Prize laureate. He gained prominence at various points in his life as an explorer, scientist, diplomat, and humanitarian. He led the team that made the first crossing of the Greenland interior in 1888, traversing the island on cross-country skis. He won international fame after reaching a record northern latitude of 86°14′ during his ''Fram'' expedition of 1893–1896. Although he retired from exploration after his return to Norway, his techniques of polar travel and his innovations in equipment and clothing influenced a generation of subsequent Arctic and Antarctic expeditions. Nansen studied zoology at the Royal Frederick University in Christiania and later worked as a curator at the University Museum of Bergen where his research on the central nervous system of lower marine creatures earned him a doctorate and helped establish neuron doctrine. Later, neuroscientist Sa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gustav Frederik Holm
Gustav Frederik Holm (6 August 1849 – 13 March 1940) was a Danish naval officer and Arctic explorer born in Copenhagen. Career He was made commander in the navy in 1899, was chief of the hydrographic bureau from 1899 to 1909, and became director of pilots in 1912. He became distinguished for his explorations, especially of the east coast of Greenland. In 1876, he participated in K. J. V. Steenstrup's geological expedition to the Julianehåb District. From 1883 to 1885 he led the Umiak Expedition with T. V. Garde, exploring the east coast of Christian IX Land, as far as 66° 8' N using umiak boats. The expedition encountered 11 Inuit communities, numbering 431 inhabitants, who were previously unknown to Europeans, and discovered five great ice fiords. For his explorations he received gold medals from the Société de géographie, Paris (1891), and the Danish Geographical Society (1895), and the Danish Order of Merit (1909). The results and observations of the expeditions we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carl Peter Holbøll
Carl Peter Holbøll (1795–1856) was an officer in the Danish Royal Navy, Greenland colonial officer and explorer of the Greenlandic fauna. Holbøll served as Royal Inspector of Colonies and Whaling in North Greenland (1825–1828), then Inspector of South Greenland (1828–1856). While in this post he became interested in natural history. His main contribution was to send large amounts of faunistic collections to the zoologists in Copenhagen. For example, professor Johannes Theodor Reinhardt described the North American form of the red-necked grebe and named it ''Podiceps holboellii'' (now ''Podiceps grisegena holboellii''). Holbøll himself also wrote a treatise on Greenlandic birds.Ornithologischer Beitrag zur Fauna Grönlands' von Carl Holböll, übersetzt und mit einem Anhang versehen von J.H. Paulsen. Leipzig, Ernst Fleischer. 1846. In the paper, he described the hoary redpoll (''Linota hornemanni'', now known as ''Carduelis hornemanni''), which he named for the botan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lying-in
Lying-in is the term given to the European forms of postpartum confinement, the traditional practice involving long bed rest before and after giving birth. The term and the practice it describes are old-fashioned or archaic, but it used to be considered an essential component of the postpartum period, even if there were no medical complications during childbirth. Description A 1932 publication refers to lying-in as ranging from two weeks to two months.Lying in by Jan Nusche quoting ''The Bride's Book — A Perpetual Guide for the Montreal Bride'', published in 1932 It also does not suggest "Getting Up" (getting out of bed post-birth) for at least nine days and ideally for 20 days. Care was provided either by her female relatives (mother or mother-in-law), or, for those who could afford it, by a temporary ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Copenhagen
Copenhagen ( or .; da, København ) is the capital and most populous city of Denmark, with a proper population of around 815.000 in the last quarter of 2022; and some 1.370,000 in the urban area; and the wider Copenhagen metropolitan area has 2,057,142 people. Copenhagen is on the islands of Zealand and Amager, separated from Malmö, Sweden, by the Øresund strait. The Øresund Bridge connects the two cities by rail and road. Originally a Viking fishing village established in the 10th century in the vicinity of what is now Gammel Strand, Copenhagen became the capital of Denmark in the early 15th century. Beginning in the 17th century, it consolidated its position as a regional centre of power with its institutions, defences, and armed forces. During the Renaissance the city served as the de facto capital of the Kalmar Union, being the seat of monarchy, governing the majority of the present day Nordic region in a personal union with Sweden and Norway ruled by the Danis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniel Frederik Eschricht
Daniel Frederik Eschricht (18 March 1798 – 22 February 1863) was a Danish zoologist, physiologist, and anatomist known as an authority on whales. He was born in Copenhagen, and studied medicine at Frederiks Hospital, graduating in 1822. He was a student of François Magendie in Paris from 1824-1825, composing a thesis on cranial nerves, after which he studied with prominent European naturalists and anatomists, including Georges Cuvier. He joined the University of Copenhagen in 1829, becoming Professor of Anatomy and Physiology in 1836. The gray whale genus '' Eschrichtius'' was named for him a year after his death. In 1861, Eschricht dissected an orca and found thirteen common porpoises and fourteen seals inside. Jules Verne referred to the incident in the Sargasso chapter of Twenty Thousand Leagues Under the Sea. He was elected as a member of the American Philosophical Society The American Philosophical Society (APS), founded in 1743 in Philadelphia, is a scholarly organiza ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hans Egede Saabye
Hans Egede Saabye (July 1746 – 31 August 1817) was a Danish priest and a missionary to Greenland. He was born on the island of Strynø in southern Denmark. He was the son of parish priest Jørgen Saabye and Petronella Egede, one of the daughters of Hans Egede, the apostle of Greenland, whose Bergen Company had begun the Danish-Norwegian settlement there in 1721. He graduated from Roskilde secondary school in 1764 and earned a degree in theology in 1767. In 1768, he was admitted to The Greenland Seminary (''Seminarium Groenlandicum'') and was instructed in the Greenlandic language by his maternal uncle, Poul Egede. In 1770, he was ordained into the ministry of the Church of Denmark. He was married to Vibeke Margrethe Thye (1748-1833) in April 1770. In the same year, he went as a missionary to Claushavn and Christianshåb in Greenland. In 1779, he became a parish priest in Vålse on Falster in south-eastern Denmark and in 1811 moved to Udby on Funen Funen ( da, F ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mexico
Mexico (Spanish: México), officially the United Mexican States, is a country in the southern portion of North America. It is bordered to the north by the United States; to the south and west by the Pacific Ocean; to the southeast by Guatemala, Belize, and the Caribbean Sea; and to the east by the Gulf of Mexico. Mexico covers ,Mexico ''''. . making it the world's 13th-largest country by are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hidalgo (state)
Hidalgo (), officially the Free and Sovereign State of Hidalgo ( es, Estado Libre y Soberano de Hidalgo) is one of the 31 states which, along with Mexico City, constitute the 32 federal entities of Mexico. It is divided into 84 municipalities and its capital city is Pachuca de Soto. Located in the eastern part of the country, Hidalgo is bordered by San Luis Potosí and Veracruz on the north, Puebla on the east, Tlaxcala and State of Mexico on the south and Querétaro on the west. In 1869, Benito Juárez created the State of Hidalgo and made Pachuca its capital city; Juárez would add the name ''"de Soto"'' in recognition of Manuel Fernando Soto, who is considered the most important driving force in creating the state. The state was named after Miguel Hidalgo y Costilla, the initiator of the Mexican War of Independence. The indigenous peoples of the state, such as the Otomi, retain much of their traditional culture. In addition to Mexicans of Spanish descent, there are also n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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