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Euphorbia Candelabrum
''Euphorbia candelabrum'' is a succulent species of plant in the family Euphorbiaceae, one of several plants commonly known as candelabra tree. It is endemic to the Horn of Africa and eastern Africa along the East African Rift system. It is known in Ethiopia by its Amharic name, ''qwolqwal'', or its Oromo name, '. It is closely related to three other species of ''Euphorbia'': ''Euphorbia ingens'' in the dry regions of southern Africa, ''Euphorbia conspicua'' from western Angola, and '' Euphorbia abyssinica'', which is native to countries including Sudan, Eritrea, Djibouti, Ethiopia and Somalia. Its Latin name derives from its growth habit, often considered to resemble the branching of a candelabrum. Candelabra trees can be found in dry deciduous and evergreen open wooded grasslands, on rocky slopes and on rare occasions termite mounds. As rainfall decreases, so does ''E. candelabrum'''s habitat range. Trees typically grow to be 12 metres in height; however, some specimens have ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Serengeti
The Serengeti ( ) ecosystem is a geographical region in Africa, spanning the Mara and Arusha Regions of Tanzania. The protected area within the region includes approximately of land, including the Serengeti National Park and several game reserves. The Serengeti hosts one of the world's largest land animal migration (in terms of total body weight), which helps secure it as one of the Seven Natural Wonders of Africa. The Serengeti is also renowned for its large lion population and is one of the best places to observe prides in their natural environment. Approximately 70 large mammal and 500 bird species are found there. This high diversity is a function of diverse habitats, including riverine forests, swamps, kopjes, grasslands, and woodlands. Blue wildebeest, gazelles, zebras, and buffalos are some of the commonly found large mammals in the region. The Serengeti also contains the Serengeti District of Tanzania. The name "Serengeti" is often said to be derived from t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterbuck
The waterbuck (''Kobus ellipsiprymnus'') is a large antelope found widely in sub-Saharan Africa. It is placed in the genus ''Kobus (antelope), Kobus'' of the family Bovidae. It was first Scientific description, described by Irish naturalist William Ogilby in 1833. Its 13 subspecies are grouped under two varieties: the common or ellipsiprymnus waterbuck and the defassa waterbuck. Their coat colour varies from brown to grey. The long, spiral horn (anatomy), horns, present only on males, curve backward, then forward, and are long. Waterbucks are rather sedentary in nature. As gregarious animals, they may form herds consisting of six to thirty individuals. These groups are either nursery herds with females and their offspring or bachelor herds. Males start showing territorial behaviour from the age of five years, but are most dominant from six to nine. The waterbuck cannot tolerate dehydration in hot weather, and thus inhabits areas close to sources of water. Predominantly a grazer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leukemia
Leukemia ( also spelled leukaemia; pronounced ) is a group of blood cancers that usually begin in the bone marrow and produce high numbers of abnormal blood cells. These blood cells are not fully developed and are called ''blasts'' or '' leukemia cells''. Symptoms may include bleeding and bruising, bone pain, fatigue, fever, and an increased risk of infections. These symptoms occur due to a lack of normal blood cells. Diagnosis is typically made by blood tests or bone marrow biopsy. The exact cause of leukemia is unknown. A combination of genetic factors and environmental (non-inherited) factors are believed to play a role. Risk factors include smoking, ionizing radiation, petrochemicals (such as benzene), prior chemotherapy, and Down syndrome. People with a family history of leukemia are also at higher risk. There are four main types of leukemia—acute lymphoblastic leukemia (ALL), acute myeloid leukemia (AML), chronic lymphocytic leukemia (CLL) and chronic myelo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Apoptosis
Apoptosis (from ) is a form of programmed cell death that occurs in multicellular organisms and in some eukaryotic, single-celled microorganisms such as yeast. Biochemistry, Biochemical events lead to characteristic cell changes (Morphology (biology), morphology) and death. These changes include Bleb (cell biology), blebbing, Plasmolysis, cell shrinkage, Karyorrhexis, nuclear fragmentation, Pyknosis, chromatin condensation, Apoptotic DNA fragmentation, DNA fragmentation, and mRNA decay. The average adult human loses 50 to 70 1,000,000,000, billion cells each day due to apoptosis. For the average human child between 8 and 14 years old, each day the approximate loss is 20 to 30 billion cells. In contrast to necrosis, which is a form of traumatic cell death that results from acute cellular injury, apoptosis is a highly regulated and controlled process that confers advantages during an organism's life cycle. For example, the separation of fingers and toes in a developing human embryo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Damara People
The Damara, plural Damaran (Khoekhoegowab: ǂNūkhoen, ''Black people'', , referring to their extended stay in hilly and mountainous sites, also called at various times the Daman or the Damaqua) are an ethnic group who make up 8.5% of Namibia, Namibia's population. They speak the Khoekhoe language (like the Nama people) and the majority live in the northwestern regions of Namibia, however, they are also found widely across the rest of the country. Genetic studies have found that Damara are closely related to neighbouring Himba people, Himba and Herero people, Herero people, consistent with an origin from Bantu speakers who shifted to a different language and culture. Their name in their own language is the ''"Daman"'' (where the ''"-n"'' is just the Khoekhoe plural ending). The name ''"Damaqua"'' stems from the addition of the Khoekhoe suffix ''"-qua/khwa"'' meaning "people" (found in the names of other Southern African peoples like the Nama people, Nama and the Griqua people ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Herero People
The Herero () are a Bantu people, Bantu ethnic group inhabiting parts of Southern Africa. 178,987 Namibians identified as Ovaherero in the 2023 census. They speak Otjiherero, a Bantu language. Though the Herero primarily reside in Namibia, there are also significant populations in Botswana and Angola, and a small number in South Africa. The Hereros in Botswana and South Africa are there because of displacement during the Herero and Nama genocide, 1904–1908 genocide committed by the German colonial empire, German Empire. Overview Unlike most Bantu, who are primarily subsistence agriculture, subsistence farmers,Immaculate N. Kizza, ''The Oral Tradition of the Baganda of Uganda: A Study and Anthology of Legends, Myths, Epigrams and Folktales'' p. 21: "The Bantu were, and still are, primarily subsistence farmers who would settle in areas, clear land, organize themselves in larger units basically for protective purposes, and start permanent settlements." the Herero are traditionall ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phorbol Esters
Phorbol esters are a class of chemical compounds found in a variety of plants, particularly in the families Euphorbiaceae and Thymelaeaceae. Chemically, they are ester derivatives of the tetracyclic diterpenoid phorbol. Biological activity Protein kinase C (PKC) is a phorbol ester receptor. Phorbol esters can stimulate PKC in a similar way to diglycerides. Phorbol esters are known for their ability to promote tumors. In particular, 12-O-tetradecanoylphorbol-13-acetate (TPA) is used as a biomedical research tool in models of carcinogenesis Carcinogenesis, also called oncogenesis or tumorigenesis, is the formation of a cancer, whereby normal cell (biology), cells are malignant transformation, transformed into cancer cells. The process is characterized by changes at the cellular, G .... Plants that contain phorbol esters are often poisonous. References Diterpenes Carboxylate esters Cyclopentenes Plant toxins {{ester-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diterpene
Diterpenes are a class of terpenes composed of four isoprene units, often with the molecular formula C20H32. They are biosynthesized by plants, animals and fungi via the HMG-CoA reductase pathway, with geranylgeranyl pyrophosphate being a primary intermediate. Diterpenes form the basis for biologically important Chemical compound, compounds such as retinol, retinal, and phytol. Some diterpenes are known to be antimicrobial and anti-inflammatory. Structures As with most terpenes a huge number of potential structures exists, which may be broadly divided according to the number of rings present. Biosynthesis Diterpenes are derived from the addition of one Isopentenyl pyrophosphate, IPP unit to Farnesyl pyrophosphate, FPP to form geranylgeranyl pyrophosphate (GGPP). From GGPP, structural diversity is achieved mainly by two classes of enzymes; the diterpene synthases and Cytochrome P450, cytochromes P450. Several diterpenes are produced by plants and cyanobacteria. GGPP is also t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eritrea
Eritrea, officially the State of Eritrea, is a country in the Horn of Africa region of East Africa, with its capital and largest city being Asmara. It is bordered by Ethiopia in the Eritrea–Ethiopia border, south, Sudan in the west, and Djibouti in the southeast. The northeastern and eastern parts of Eritrea have an extensive coastline along the Red Sea. The nation has a total area of approximately , and includes the Dahlak Archipelago and several of the Hanish Islands. Hominid remains found in Eritrea have been dated to 1 million years old and anthropological research indicates that the area may contain significant records related to the evolution of humans. The Kingdom of Aksum, covering much of modern-day Eritrea and Tigray Region, northern Ethiopia, was established during the first or second century AD.Henze, Paul B. (2005) ''Layers of Time: A History of Ethiopia'', . It adopted Eritrean Orthodox Church, Christianity around the middle of the fourth century. Beginning in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keren, Eritrea
Keren (Tigrinya language, Tigrinya and Tigre language, Tigre: , Arabic language, Arabic: كرن, Italian language, Italian: ''Cheren''), historically known as Sanhit,Shinn, David & al. "Hewitt Treaty" in the ''Historical Dictionary of Ethiopia''p. 214 is the second-largest city in Eritrea. It is situated around northwest of Asmara at an elevation of above sea-level. The city sprawls on a wide basin surrounded by granitic mountains on all sides. It serves as the capital of the Anseba Region, and is home to a number of Demographics of Eritrea#Ethno-linguistic groups, ethnic groups including the Bilen people, Bilen people and Tigre people, Tigre people. History 19th century Keren was originally a trading settlement on the Ethiopian frontier, laying on an arid highland plain between the Ansaba and Barka rivers. The settlement owned its importance to its position on the trade route between Massawa and Sudan. The market was largely dominated by traders from Arkiko, whose ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Richard Pankhurst (academic)
Richard Keir Pethick Pankhurst OBE (3 December 1927 – 16 February 2017) was a British scholar who was a founding member of the Institute of Ethiopian Studies and professor at the University of Addis Ababa in Ethiopia. His books have been reviewed in scholarly journals, with Edward Ullendorff calling his ''The Ethiopians'' as another testimony to his "remarkable diligence and industry in the service of Ethiopian studies". He is known for his research on economic history and socio-cultural studies on Ethiopia. Early life and education Pankhurst was born in 1927 in Woodford Green to left communist and former suffragette Sylvia Pankhurst and Italian anarchist Silvio Corio. His maternal grandparents were Emmeline and Richard Pankhurst. Pankhurst studied at Chigwell School, Bancroft's School in Woodford, and then at the London School of Economics, [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leprosy
Leprosy, also known as Hansen's disease (HD), is a Chronic condition, long-term infection by the bacteria ''Mycobacterium leprae'' or ''Mycobacterium lepromatosis''. Infection can lead to damage of the Peripheral nervous system, nerves, respiratory tract, skin, and eyes. This nerve damage may result in a lack of ability to feel pain, which can lead to the loss of parts of a person's Appendicular skeleton, extremities from repeated injuries or infection through unnoticed wounds. An infected person may also experience muscle weakness and poor eyesight. Leprosy symptoms may begin within one year, but for some people symptoms may take 20 years or more to occur. Leprosy is spread between people, although extensive contact is necessary. Leprosy has a low pathogenicity, and 95% of people who contract or who are exposed to ''M. leprae'' do not develop the disease. Spread is likely through a cough or contact with fluid from the nose of a person infected by leprosy. Genetic factors and i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
