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Ecosphere (aquarium)
The EcoSphere and "Original Ecosphere" are trademark names for sealed blown-glass miniature aquaria produced by Ecosphere Associates, Inc., of Tucson, Arizona, United States. Spherical or ovoid, the aquaria range from roughly pool-ball-size to basket-ball-size. They are sold worldwide as scientific novelties and decorative objects. The EcoSphere's main visual appeal is provided by tiny red-pink shrimp, ''Halocaridina rubra'', between 1/4 and 3/8 inch (or approximately a centimeter) in length. The shrimp swim energetically around the aquarium, eat the brown bacterial and algal scum on the glass, consume the filamentous green algae which sometimes forms a globular pillow in the water, and perch on a fragment of soft coral. The main conceptual interest of these objects lies in the fact that they are materially closed ecological systems which are self-sustaining over a period of years. At room temperature, and with only low inputs of light, the algae produce oxygen which supports ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Oval Ecosphere
An oval () is a closed curve in a plane which resembles the outline of an egg. The term is not very specific, but in some areas (projective geometry, technical drawing, etc.) it is given a more precise definition, which may include either one or two axes of symmetry of an ellipse. In common English, the term is used in a broader sense: any shape which reminds one of an egg. The three-dimensional version of an oval is called an ovoid. Oval in geometry The term oval when used to describe curves in geometry is not well-defined, except in the context of projective geometry. Many distinct curves are commonly called ovals or are said to have an "oval shape". Generally, to be called an oval, a plane curve should ''resemble'' the outline of an egg or an ellipse. In particular, these are common traits of ovals: * they are differentiable (smooth-looking), simple (not self-intersecting), convex, closed, plane curves; * their shape does not depart much from that of an ellipse, and * an ov ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jet Propulsion Laboratory
The Jet Propulsion Laboratory (JPL) is a federally funded research and development center and NASA field center in the City of La Cañada Flintridge, California, United States. Founded in the 1930s by Caltech researchers, JPL is owned by NASA and managed by the nearby California Institute of Technology (Caltech). The laboratory's primary function is the construction and operation of planetary robotic spacecraft, though it also conducts Earth-orbit and astronomy missions. It is also responsible for operating the NASA Deep Space Network. Among the laboratory's major active projects are the Mars 2020 mission, which includes the ''Perseverance'' rover and the '' Ingenuity'' Mars helicopter; the Mars Science Laboratory mission, including the ''Curiosity'' rover; the InSight lander (''Interior Exploration using Seismic Investigations, Geodesy and Heat Transport''); the ''Mars Reconnaissance Orbiter''; the ''Juno'' spacecraft orbiting Jupiter; the ''SMAP'' satellite for earth surface s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Make (magazine)
''Make'' (stylized as ''Make:'' or ''MAKE:'') is an American magazine published by Make: Community LLC which focuses on Do It Yourself (DIY) and/or Do It With Others (DIWO) projects involving computers, electronics, metalworking, robotics, woodworking and other disciplines. The magazine is marketed to people who enjoyed making things and features complex projects which can often be completed with cheap materials, including household items. ''Make'' is considered "a central organ of the maker movement". In June 2019, ''Make'' magazine's parent company, Maker Media, abruptly shut down the bimonthly magazine due to lack of financial resources. As of June 10, 2019, it was reorganized and had since started publishing new quarterly issues, with volume 70 having shipped in October 2019. History and profile The magazine's first issue was released in February 2005 and then published as a quarterly in the months of February, May, August, and November; as of Fall 2022, 82 issues have been pu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Homeostasis
In biology, homeostasis (British English, British also homoeostasis) Help:IPA/English, (/hɒmɪə(ʊ)ˈsteɪsɪs/) is the state of steady internal, physics, physical, and chemistry, chemical conditions maintained by organism, living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). Other variables include the pH of extracellular fluid, the concentrations of sodium, potassium and calcium ions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Each of these variables is controlled by one or more regulators or homeostatic mechanisms, which together maintain life. Homeostasis is brought about by a natural resistance to change when already in the optimal conditions, and equilibrium is maintained by many regulatory mechanisms: it is thought to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spirulina (genus)
''Spirulina'' is a genus of cyanobacteria. Species * '' Spirulina abbreviata'' * '' Spirulina agilis'' * '' Spirulina agilissima'' * '' Spirulina albida'' * '' Spirulina ardissoni'' * '' Spirulina baltica'' * '' Spirulina bayannurensis'' * '' Spirulina breviarticulata'' * '' Spirulina cabrerae'' * '' Spirulina caldaria'' * '' Spirulina cavanillesiana'' * '' Spirulina condensata'' * '' Spirulina corakiana'' * '' Spirulina flavovirens'' * ''Spirulina funiformis'' * '' Spirulina gessneri'' * '' Spirulina gomontiana'' * '' Spirulina gomontii'' * ''Spirulina gordiana'' * ''Spirulina gracilis'' * ''Spirulina innatans'' * ''Spirulina labyrinthiformis'' * ''Spirulina laxa'' * ''Spirulina laxissima'' * ''Spirulina legitima'' * ''Spirulina magnifica'' * ''Spirulina major'' * ''Spirulina margaritae'' * '' Spirulina mariae'' * '' Spirulina massartii'' * '' Spirulina maxima'' * '' Spirulina miniata'' * '' Spirulina minima'' * '' Spirulina mukdensis'' * '' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Buffering Agent
A buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small amount of strong acid or base is added to it. Buffer solutions are used as a means of keeping pH at a nearly constant value in a wide variety of chemical applications. In nature, there are many living systems that use buffering for pH regulation. For example, the bicarbonate buffering system is used to regulate the pH of blood, and bicarbonate also acts as a buffer in the ocean. Principles of buffering Buffer solutions resist pH change because of a chemical equilibrium between the weak acid HA and its conjugate base A−: When some strong acid is added to an equilibrium mixture of the weak acid and its conjugate base, hydrogen ions (H+) are added, and the equilibrium is shifted to the left, in accordance with Le Chatelier's principle. Because of this, the hydrogen ion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gorgonia
''Gorgonia'' is a genus of soft corals, sea fans in the family Gorgoniidae. Species The World Register of Marine Species lists these species In biology, a species is the basic unit of classification and a taxonomic rank of an organism, as well as a unit of biodiversity. A species is often defined as the largest group of organisms in which any two individuals of the appropriate s ...: References Gorgoniidae Octocorallia genera Taxa named by Carl Linnaeus {{octocorallia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Snail
A snail is, in loose terms, a shelled gastropod. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. However, the common name ''snail'' is also used for most of the members of the molluscan class Gastropoda that have a coiled shell that is large enough for the animal to retract completely into. When the word "snail" is used in this most general sense, it includes not just land snails but also numerous species of sea snails and freshwater snails. Gastropods that naturally lack a shell, or have only an internal shell, are mostly called '' slugs'', and land snails that have only a very small shell (that they cannot retract into) are often called ''semi-slugs''. Snails have considerable human relevance, including as food items, as pests, and as vectors of disease, and their shells are used as decorative objects and are incorporated into jewelry. The snail has also had some cultural significance, tending to be associated with lethargy. The sn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Science
''Pacific Science'' is a quarterly multidisciplinary peer-reviewed scientific journal covering the biological and physical sciences of the Pacific basin, focusing especially on biogeography, ecology, evolution, geology and volcanology, oceanography, palaeontology, and systematics. It is published by the University of Hawaii Press and was established in 1947. It is the official journal of the Pacific Science Association. The founding editor-in-chief was A. Grove Day. Leonard D. Tuthill served as editor of vols. 2-7 (1948–1953); William A. Gosline edited vols. 8-10 (1954–1956) and vols. 22-25 (1968–1971); and O. A. Bushnell edited vols. 11-21 (1957–1967). The longest-serving editor was E. Alison Kay, who edited vols. 26-54 (1972–2000), stepping down only after she retired. Gerald D. Carr edited vols. 55-58 (2001–2004) and from vol. 59 (2005) was succeeded by Curtis C. Daehler. All editors have been faculty of the University of Hawaii. The journal's first electronic e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brackish Water
Brackish water, sometimes termed brack water, is water occurring in a natural environment that has more salinity than freshwater, but not as much as seawater. It may result from mixing seawater (salt water) and fresh water together, as in estuaries, or it may occur in brackish fossil aquifers. The word comes from the Middle Dutch root '' brak''. Certain human activities can produce brackish water, in particular civil engineering projects such as dikes and the flooding of coastal marshland to produce brackish water pools for freshwater prawn farming. Brackish water is also the primary waste product of the salinity gradient power process. Because brackish water is hostile to the growth of most terrestrial plant species, without appropriate management it is damaging to the environment (see article on shrimp farms). Technically, brackish water contains between 0.5 and 30 grams of salt per litre—more often expressed as 0.5 to 30 parts per thousand (‰), which is a specific gr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adaptability
Adaptability ( la, adaptō "fit to, adjust") is a feature of a system or of a process. This word has been put to use as a specialised term in different disciplines and in business operations. Word definitions of adaptability as a specialised term differ little from dictionary definitions. According to Andresen and Gronau adaptability in the field of organizational management can in general be seen as an ability to change something or oneself to fit to occurring changes. In ecology, adaptability has been described as the ability to cope with unexpected disturbances in the environment. With respect to business and manufacturing systems and processes, adaptability has come to be seen increasingly as an important factor for their efficiency and economic success. In contrast, adaptability and efficiency are held to be in opposition to each other in biological and ecological systems, requiring a trade-off, since both are important factors in the success of such systems. To determine the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
