|
Amphidinium Carterae
''Amphidinium carterae'' is a species of dinoflagellates. It was first described by Edward M. Hulburt in 1957, and was named in honour of the British phycologist Nellie Carter-Montford. The type locality is Great Pond, Barnstable County, Massachusetts, USA. Some strains of this species are considered as toxic (against fungi, for example). Distribution ''Amphidinium carterae'' is known from both sides of the North Atlantic Ocean, the Bay of Fundy, the Gulf of Mexico, the Baltic Sea, the North Sea and the Mediterranean Sea. It also occurs in Brazil and New Zealand. It is found in shallow waters in coastal bays and estuaries. Ecology ''Amphidinium carterae'' is a species that sometimes causes algal blooms. In laboratory, the presence of a lysate of an ''A. carterae'' strain affects the embryonic development of sea urchins. Use in research ''Amphidinium carterae'' is a photosynthetic organism and can be cultured in the laboratory under suitable conditions of temperature and li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAR Supergroup
The SAR supergroup, also just SAR or Harosa, is a clade that includes stramenopiles (heterokonts), alveolates, and Rhizaria. The name is an acronym derived from the first letters of each of these clades; it has been alternatively spelled "RAS". The term "Harosa" (at the subkingdom level) has also been used. The SAR supergroup is a node-based taxon. Note that as a formal taxon, "Sar" has only its first letter capitalized, while the earlier abbreviation, SAR, retains all uppercase letters. Both names refer to the same group of organisms, unless further taxonomic revisions deem otherwise. Members of the SAR supergroup were once included under the separate supergroups Chromalveolata (Chromista and Alveolata) and Rhizaria, until phylogenetic studies confirmed that stramenopiles and alveolates diverged with Rhizaria. This apparently excluded haptophytes and cryptomonads, leading Okamoto ''et al.'' (2009) to propose the clade Hacrobia to accommodate them. Phylogeny Based on a compi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type (biology)
In biology, a type is a particular specimen (or in some cases a group of specimens) of an organism to which the scientific name of that organism is formally attached. In other words, a type is an example that serves to anchor or centralizes the defining features of that particular taxon. In older usage (pre-1900 in botany), a type was a taxon rather than a specimen. A taxon is a scientifically named grouping of organisms with other like organisms, a set that includes some organisms and excludes others, based on a detailed published description (for example a species description) and on the provision of type material, which is usually available to scientists for examination in a major museum research collection, or similar institution. Type specimen According to a precise set of rules laid down in the International Code of Zoological Nomenclature (ICZN) and the International Code of Nomenclature for algae, fungi, and plants (ICN), the scientific name of every taxon is almost al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Minicircle
Minicircles are small (~4 kb) circular replicons. They occur naturally in some eukaryotic organelle genomes. In the mitochondria-derived kinetoplast of trypanosomes, minicircles encode guide RNAs for RNA editing. In ''Amphidinium'', the chloroplast genome is made of minicircles that encode chloroplast proteins. ''In vitro'' experimentally-derived minicircles Minicircles are small (~4kb) circular plasmid derivatives that have been freed from all prokaryotic vector parts. They have been applied as transgene carriers for the genetic modification of mammalian cells, with the advantage that, since they contain no bacterial DNA sequences, they are less likely to be perceived as foreign and destroyed. (Typical transgene delivery methods involve plasmids, which contain foreign DNA.) The smaller size of minicircles also extends their cloning capacity and facilitates their delivery into cells. Their preparation usually follows a two-step procedure: * production of a 'parental plasmi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genome
In the fields of molecular biology and genetics, a genome is all the genetic information of an organism. It consists of nucleotide sequences of DNA (or RNA in RNA viruses). The nuclear genome includes protein-coding genes and non-coding genes, other functional regions of the genome such as regulatory sequences (see non-coding DNA), and often a substantial fraction of 'junk' DNA with no evident function. Almost all eukaryotes have mitochondria and a small mitochondrial genome. Algae and plants also contain chloroplasts with a chloroplast genome. The study of the genome is called genomics. The genomes of many organisms have been sequenced and various regions have been annotated. The International Human Genome Project reported the sequence of the genome for ''Homo sapiens'' in 200The Human Genome Project although the initial "finished" sequence was missing 8% of the genome consisting mostly of repetitive sequences. With advancements in technology that could handle sequenci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chloroplast
A chloroplast () is a type of membrane-bound organelle known as a plastid that conducts photosynthesis mostly in plant and algal cells. The photosynthetic pigment chlorophyll captures the energy from sunlight, converts it, and stores it in the energy-storage molecules ATP and NADPH while freeing oxygen from water in the cells. The ATP and NADPH is then used to make organic molecules from carbon dioxide in a process known as the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, amino acid synthesis, and the immune response in plants. The number of chloroplasts per cell varies from one, in unicellular algae, up to 100 in plants like ''Arabidopsis'' and wheat. A chloroplast is characterized by its two membranes and a high concentration of chlorophyll. Other plastid types, such as the leucoplast and the chromoplast, contain little chlorophyll and do not carry out photosynthesis. Chloroplasts are highly dynamic—they circulat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Model Organism
A model organism (often shortened to model) is a non-human species that is extensively studied to understand particular biological phenomena, with the expectation that discoveries made in the model organism will provide insight into the workings of other organisms. Model organisms are widely used to research human disease when human experimentation would be unfeasible or unethical. This strategy is made possible by the common descent of all living organisms, and the conservation of metabolic and developmental pathways and genetic material over the course of evolution. Studying model organisms can be informative, but care must be taken when generalizing from one organism to another. In researching human disease, model organisms allow for better understanding the disease process without the added risk of harming an actual human. The species chosen will usually meet a determined taxonomic equivalency to humans, so as to react to disease or its treatment in a way that resembles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peridinin
Peridinin is a light-harvesting apocarotenoid, a pigment associated with chlorophyll and found in the peridinin-chlorophyll-protein (PCP) light-harvesting complex in dinoflagellates, best studied in ''Amphidinium carterae''. Biological significance Peridinin is an apocarotenoid pigment that some organisms use in photosynthesis. Many photosynthetic dinoflagellates use peridinin, which absorbs blue-green light in the 470-550nm range, outside the range accessible to chlorophyll molecules. The peridinin-chlorophyll-protein complex is a specialized molecular complex consisting of a boat-shaped protein molecule with a large central cavity that contains peridinin, chlorophyll, and lipid molecules, usually in a 4:1 ratio of peridinin to chlorophyll. Spectral characteristics * Absorption maximum: 483 nm * Emission maximum: 676 nm * Extinction coefficient (ε): 1.96 x 106 M−1cm−1 * A483/A280 ≥ 4.6 Applications Peridinin chlorophyll (PerCP) is commonly used in immunoassa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sea Urchin
Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of sea urchins are round and spiny, ranging in diameter from . Sea urchins move slowly, crawling with tube feet, and also propel themselves with their spines. Although algae are the primary diet, sea urchins also eat slow-moving (sessile) animals. Predators that eat sea urchins include a wide variety of fish, starfish, crabs, marine mammals. Sea urchins are also used as food especially in Japan. Adult sea urchins have fivefold symmetry, but their pluteus larvae feature bilateral (mirror) symmetry, indicating that the sea urchin belongs to the Bilateria group of animal phyla, which also comprises the chordates and the arthropods, the annelids and the molluscs, and are found in every ocean and in every climate, from the tropics to the pol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barnstable County, Massachusetts
Barnstable County is a county located in the U.S. state of Massachusetts. At the 2020 census, the population was 228,996. Its shire town is Barnstable. The county consists of Cape Cod and associated islands (some adjacent islands are in Dukes County and Nantucket County). Barnstable County was formed as part of the Plymouth Colony on 2 June 1685, including the towns of Falmouth, Sandwich, and others lying to the east and north on Cape Cod. Plymouth Colony was merged into the Province of Massachusetts Bay in 1691. History Giovanni da Verrazzano Cape Cod is described in a letter from the Italian explorer Giovanni da Verrazzano to Francis I of France, relating the details of a voyage to the New World made on behalf of the French crown in the ship Dauphine, the only surviving of a fleet of four. Sailing from Madeira in 1524, the Dauphine made land in North Carolina in March. It sailed north to Newfoundland, mapping the coast and interviewing the natives, whom he found frie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nellie Carter-Montford
Nelly (born 1974) is an American rapper, singer, actor and entrepreneur. Nelly or Nellie may also refer to: Places * Nellie, Ohio, an American village * Nellie, Assam, a town in Nagaon district * Nelly Island, Antarctica * Nelly Island, Bermuda * Mount Nelly, Bolivia, a stratovolcano in the Andes People * Nelly (given name), a list of people with the given name or nickname Nelly or Nellie * Nelly (Egyptian entertainer), Egyptian singer, actor, and radio and television personality and presenter * Nelly Furtado, a Canadian singer, songwriter and record producer * Nelly's (1899–1998), Greek photographer (real name Elli Souyioultzoglou-Seraïdari) * Harry Nelly, head coach of the Army college football program from 1908 to 1910 Arts and entertainment * Nelly (2004 film), a French film * Nelly (2016 film), a Canadian film * ''Nellie'', a boat in Joseph Conrad's novella ''Heart of Darkness'' Other uses * , a Danish steamship in service between 1928 and 1936 * "Nellie", a proto ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phycology
Phycology () is the scientific study of algae. Also known as algology, phycology is a branch of life science. Algae are important as primary producers in aquatic ecosystems. Most algae are eukaryotic, photosynthetic organisms that live in a wet environment. They are distinguished from the higher plants by a lack of true roots, stems or leaves. They do not produce flowers. Many species are single-celled and microscopic (including phytoplankton and other microalgae); many others are multicellular to one degree or another, some of these growing to large size (for example, seaweeds such as kelp and ''Sargassum''). Phycology includes the study of prokaryotic forms known as blue-green algae or cyanobacteria. A number of microscopic algae also occur as symbionts in lichens. Phycologists typically focus on either freshwater or ocean algae, and further within those areas, either diatoms or soft algae. History of phycology While both the ancient Greeks and Romans knew of algae, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> Type (biology)")
