|
Desmarestia Ligulata
''Desmarestia ligulata'' is a species of brown algae found worldwide. Its common names include color changer, Desmarest's flattened weed, and sea sorrel, though the last name can also refer to other species of '' Desmarestia''. Habitat This species is found between the low intertidal to subtidal zones on open coasts. It is the most abundant marine algae associated with giant kelp forests. Acid accumulation ''Desmarestia ligulata'' is known for its ability to accumulate high levels of sulfuric acid in its vacuole A vacuole () is a membrane-bound organelle which is present in plant and fungal cells and some protist, animal, and bacterial cells. Vacuoles are essentially enclosed compartments which are filled with water containing inorganic and organic mo ...s. This accumulation appears to be active and permanent, occurring during cell growth and division while unaffected by light regimes or external nutrient profiles. It has been suggested that this acid accumulation is an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
John Stackhouse (botanist)
John Stackhouse (1742 – 22 November 1819) was an English botanist, primarily interested in spermatophytes, algae and mycology. He was born in Probus, Cornwall, and built Acton Castle, above Stackhouse Cove, Cornwall, in order to further his studies about the propagation of algae from their spores. He was the author of ''Nereis Britannica; or a Botanical Description of British Marine Plants, in Latin and English, accompanied with Drawings from Nature'' (1797). Personal life The second son of William Stackhouse, D.D. (d. 1771), rector of St. Erme, Cornwall, and nephew of Thomas Stackhouse, he was born at Trehane, Probus, in Cornwall. On 20 June 1758 he matriculated at Exeter College, Oxford, and was a Fellow of the college from 1761 to 1764. On succeeding his relative, Mrs. Grace Percival, sister of Sir William Pendarves, in the Pendarves estates in 1763, he resigned his fellowship, and, after travelling abroad for two or three years, settled on his newly acquired property. In 1 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jean Vincent Félix Lamouroux
Jean Vincent Félix Lamouroux (3 May 1779 – 26 March 1825) was a French biologist and naturalist, noted for his seminal work with algae. Biography Lamouroux was born in Agen in the Aquitaine of southwestern France, the son of Claude Lamouroux, an intellectual who made his livelihood in manufacturing, but who was also a musician, a one-term mayor of Agen, and a co-founder of the Academic Society of Agen. Jean Vincent Lamouroux studied botany at the Boudon de Saint-Amans school in Agen. Lamouroux was particularly interested in marine organisms such as algae and hydrozoans. In 1805 he published a dissertation on several species of ''Fucus'' before settling in Paris in 1807, after his father went into bankruptcy. In 1807, Lamouroux was appointed to the French Academy of Sciences and in 1808 he became assistant professor of natural history at the University of Caen, rising to full professorship by 1811. He joined the Linnean Society of Calvados and contributed to its publications, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brown Algae
Brown algae (singular: alga), comprising the class Phaeophyceae, are a large group of multicellular algae, including many seaweeds located in colder waters within the Northern Hemisphere. Brown algae are the major seaweeds of the temperate and polar regions. They are dominant on rocky shores throughout cooler areas of the world. Most brown algae live in marine environments, where they play an important role both as food and as a potential habitat. For instance, ''Macrocystis'', a kelp of the order Laminariales, may reach in length and forms prominent underwater kelp forests. Kelp forests like these contain a high level of biodiversity. Another example is ''Sargassum'', which creates unique floating mats of seaweed in the tropical waters of the Sargasso Sea that serve as the habitats for many species. Many brown algae, such as members of the order Fucales, commonly grow along rocky seashores. Some members of the class, such as kelps, are used by humans as food. Between 1,500 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Name
In biology, a common name of a taxon or organism (also known as a vernacular name, English name, colloquial name, country name, popular name, or farmer's name) is a name that is based on the normal language of everyday life; and is often contrasted with the scientific name for the same organism, which is Latinized. A common name is sometimes frequently used, but that is not always the case. In chemistry, IUPAC defines a common name as one that, although it unambiguously defines a chemical, does not follow the current systematic naming convention, such as acetone, systematically 2-propanone, while a vernacular name describes one used in a lab, trade or industry that does not unambiguously describe a single chemical, such as copper sulfate, which may refer to either copper(I) sulfate or copper(II) sulfate. Sometimes common names are created by authorities on one particular subject, in an attempt to make it possible for members of the general public (including such interested par ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmarestia
''Desmarestia'' is a genus of brown algae found worldwide. It is also called acid weed, acidweed, ', sea sorrel, (), ', mermaid's hair, landlady's wig, or '. However, 'sea sorrel' can also specifically refer to ''Desmarestia viridis''. Members of this genus can be either annual or perennial. Annual members of this genus store sulfuric acid in intracellular vacuoles. When exposed to air they release the acid, thereby destroying themselves and nearby seaweeds in the process. They are found in shallow intertidal zones. Ingesting sulfuric acid can cause severe digestive problems. but since sulfuric acid tastes extremely sour, members of the genus are unlikely to be eaten in harmful quantities. The genus was named in honor of Anselme Gaëtan Desmarest. Species AlgaeBase lists 32 currently accepted species within the genus ''Desmarestia'', not including variations and subspecies. * ''Desmarestia aculeata'' ( L.) J.V.Lamouroux - Type specimen for the genus * ''Desmarestia ance ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmarestia Ligulata Drawing
''Desmarestia'' is a genus of brown algae found worldwide. It is also called acid weed, acidweed, ', sea sorrel, (), ', mermaid's hair, landlady's wig, or '. However, 'sea sorrel' can also specifically refer to '' Desmarestia viridis''. Members of this genus can be either annual or perennial. Annual members of this genus store sulfuric acid in intracellular vacuoles. When exposed to air they release the acid, thereby destroying themselves and nearby seaweeds in the process. They are found in shallow intertidal zones. Ingesting sulfuric acid can cause severe digestive problems. but since sulfuric acid tastes extremely sour, members of the genus are unlikely to be eaten in harmful quantities. The genus was named in honor of Anselme Gaëtan Desmarest. Species AlgaeBase lists 32 currently accepted species within the genus ''Desmarestia'', not including variations and subspecies. * '' Desmarestia aculeata'' ( L.) J.V.Lamouroux - Type specimen for the genus * '' Desmarestia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sulfuric Acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formula . It is a colorless, odorless and viscous liquid that is miscible with water. Pure sulfuric acid does not exist naturally on Earth due to its strong affinity to water vapor; it is hygroscopic and readily absorbs water vapor from the air. Concentrated sulfuric acid is highly corrosive towards other materials, from rocks to metals, since it is an oxidant with powerful dehydrating properties. Phosphorus pentoxide is a notable exception in that it is not dehydrated by sulfuric acid, but to the contrary dehydrates sulfuric acid to sulfur trioxide. Upon addition of sulfuric acid to water, a considerable amount of heat is released; thus the reverse procedure of adding water to the acid should not be performed since the heat released may boi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vacuole
A vacuole () is a membrane-bound organelle which is present in plant and fungal cells and some protist, animal, and bacterial cells. Vacuoles are essentially enclosed compartments which are filled with water containing inorganic and organic molecules including enzymes in solution, though in certain cases they may contain solids which have been engulfed. Vacuoles are formed by the fusion of multiple membrane vesicles and are effectively just larger forms of these. The organelle has no basic shape or size; its structure varies according to the requirements of the cell. Discovery Contractile vacuoles ("stars") were first observed by Spallanzani (1776) in protozoa, although mistaken for respiratory organs. Dujardin (1841) named these "stars" as ''vacuoles''. In 1842, Schleiden applied the term for plant cells, to distinguish the structure with cell sap from the rest of the protoplasm. In 1885, de Vries named the vacuole membrane as tonoplast. Function The function and signifi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Active Transport
In cellular biology, ''active transport'' is the movement of molecules or ions across a cell membrane from a region of lower concentration to a region of higher concentration—against the concentration gradient. Active transport requires cellular energy to achieve this movement. There are two types of active transport: primary active transport that uses adenosine triphosphate ( ATP), and secondary active transport that uses an electrochemical gradient. Some examples of active transport include: * Phagocytosis of bacteria by macrophages * Movement of calcium ions out of cardiac muscle cells * Transportation of amino acids across the intestinal lining in the human gut * Secretion of proteins such as enzymes, peptide hormones, and antibodies from various cells * Functioning of white blood cells to defend invading diseases Active cellular transportation (ACT) Unlike passive transport, which uses the kinetic energy and natural entropy of molecules moving down a gradient, active ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Desmarestiales
Desmarestiales is an order in the brown algae (Phaeophyceae). Members of this order have terete or ligulate (flat) pinnately branched thalli attached by discoid holdfasts. They have a sporphytic thallus usually aggregated to form a pseudo-parenchyma.Pound F.E. 1962 “The Biology of the Algae” Edward Arnold Ltd. The order gets its name from the genus ''Desmarestia'', which is named after the French zoologist Anselme Gaëtan Desmarest (1784–1838).Genaust, Helmut (1976). ''Etymologisches Wörterbuch der botanischen Pflanzennamen'' As the general name of the class suggests, their pigment A pigment is a colored material that is completely or nearly insoluble in water. In contrast, dyes are typically soluble, at least at some stage in their use. Generally dyes are often organic compounds whereas pigments are often inorganic compo ...ation is brown. References Further reading External links AlgaeBase Brown algae orders {{Phaeophyceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
