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  • reaction
  • An ate complex in chemistry is a salt formed by reaction of a Lewis acid with a base whereby the central atom increases its valence. (wikipedia.org)
  • Illustrative is the preparation of the methyl derivative of cyclopentadienyliron dicarbonyl anion: CpFe(CO)2Na + CH3I → CpFe(CO)2CH3 + NaI Many metal alkyls are prepared by oxidative addition: An example is the reaction of a Vaska's complex with methyl iodide. (wikipedia.org)
  • A complex response refers to an environmental reaction to change that occurs at multiple levels to multiple objects, and can induce a chain reaction of responses to a single initial change. (wikipedia.org)
  • Carbonyl and Hydrido-Carbonyl Complexes of Iridium by Reaction with Alcohols. (wikipedia.org)
  • analogous
  • In the hydrolytic kinetic resolution technique, racemic mixture of epoxides may be separated by selectively hydrolyzing one enantiomer, catalyzed by the analogous cobalt(III) complex. (wikipedia.org)
  • Examples
  • Examples of complex systems are Earth's global climate , organisms , the human brain , social and economic organizations (like cities ), an ecosystem , a living cell , and ultimately the entire universe . (wikipedia.org)
  • constants
  • Jannik Bjerrum developed the first general method for the determination of stability constants of metal-ammine complexes in 1941. (wikipedia.org)
  • Bjerrum went on to determine the stability constants for systems in which many complexes may be formed. (wikipedia.org)
  • Subsequently, computer programs capable of handling complex equilibria in general, such as SCOGS and MINIQUAD were developed so that today the determination of stability constants has almost become a "routine" operation. (wikipedia.org)
  • hydrogen
  • One determinant of the kinetic stability of metal-alkyl complexes is the presence of hydrogen at the position beta to the metal. (wikipedia.org)
  • The magnitude of spin-spin coupling, JHD, is a useful indicator of the strength of the bond between the hydrogen and deuterium in HD complexes. (wikipedia.org)
  • Treatment of chlorobis(dppe)iron hydride with sodium tetrafluorborate under and atmostphere of hydrogen is one example: HFeCl(dppe)2 + NaBF4 + H2 → [HFe(H2)(dppe)F4 + NaCl Many metal hydrides can be protonated to give dihydrogen complexes: H2Fe(dppe)2 + H+ → [HFe(H2)(dppe) In such cases the acid usually is derived from a weakly coordinating anion, e.g. (wikipedia.org)
  • Two molecular hydrogen complexes: trans-[M(η2-H2)(H)(PPh2CH2CH2PPh2)F4 (M = Fe, Ru). (wikipedia.org)
  • autosomal dominant
  • Carney complex is inherited in an autosomal dominant pattern, which means one copy of the altered gene in each cell is sufficient to cause the disorder. (nih.gov)
  • Carney complex and its subsets LAMB syndrome and NAME syndrome are autosomal dominant conditions comprising myxomas of the heart and skin, hyperpigmentation of the skin (lentiginosis), and endocrine overactivity. (wikipedia.org)
  • Both types of Carney complex are autosomal dominant. (wikipedia.org)
  • synthesis
  • Endogenous human alpha-lactalbumin is complexed with a calcium ion and serves as a cofactor in lactose synthesis, but has no tumoricidal properties. (wikipedia.org)
  • Hydrothermal synthesis is another method used to obtain UV silicates where the reactions are carried out under high temperatures like 600 °C. Another way to make pentavalent uranyl complexes is the reduction of UVI containing [UO+. (wikipedia.org)
  • compound
  • For example, the ate complex of a boron compound is called a borate. (wikipedia.org)
  • Vaska's complex is the trivial name for the chemical compound trans-carbonylchlorobis(triphenylphosphine)iridium(I), which has the formula IrCl(CO)[P(C6H5). (wikipedia.org)
  • carbon
  • In subsequent work, chromium(III) and cobalt(III) salen complexes were found to be good catalysts for preparing poly(carbonates) from carbon dioxide and epoxides. (wikipedia.org)
  • Infrared spectroscopy can be used to analyse the products of oxidative addition to Vaska's complex because the reactions induce characteristic shifts of the stretching frequency of the coordinated carbon monoxide. (wikipedia.org)
  • Frequency
  • In free H2, this very strong bond absorbs at 4300 cm−1, whereas in dihydrogen complexes the frequency drops to around 2800 cm−1. (wikipedia.org)
  • Vaska's complex: 1967 cm−1 Vaska's complex + O2: 2015 cm−1 Vaska's complex + MeI: 2047 cm−1 Vaska's complex + I2: 2067 cm−1 Oxidative addition to give Ir(III) products reduces the π-bonding from Ir to C, which causes the increase in the frequency of the carbonyl stretching band. (wikipedia.org)
  • undergo
  • Experimental and computational studies of many regulatory complexes support the current view that they possess the intrinsic ability to undergo conformational transitions, conferred by the 3-dimensional network of interresidue interactions ( 4 - 8 ). (pnas.org)
  • If such hydrogens are present and if the metal center is coordinatively unsaturated, then the complex can undergo beta-hydride elimination to form a metal-alkene complex: These conversions are assumed to proceed via the intermediacy of agostic interactions. (wikipedia.org)
  • Vaska's complex can undergo oxidative addition and is notable for its ability to bind to O2 reversibly. (wikipedia.org)
  • theory
  • As a field of study, complex systems is a subset of systems theory . (wikipedia.org)
  • General systems theory focuses similarly on the collective behaviors of interacting entities, but it studies a much broader class of systems, including non-complex systems where traditional reductionist approaches may remain viable. (wikipedia.org)
  • As it relates to complex systems, systems theory contributes an emphasis on the way relationships and dependencies between a system's parts can determine system-wide properties. (wikipedia.org)
  • Specific concepts important to complex systems, such as emergence, feedback loops, and adaptation, also originate in systems theory. (wikipedia.org)
  • In the context of network theory , a complex network is a graph (network) with non-trivial topological features-features that do not occur in simple networks such as lattices or random graphs but often occur in graphs modelling of real systems. (wikipedia.org)
  • Blomstrand developed what has come to be known as the complex ion chain theory. (wikipedia.org)
  • One of the key differences between Jungian and Freudian theory is that Jung's thought posits several different kinds of complex. (wikipedia.org)
  • According to Jung's personality theory, complexes are building blocks of the psyche and the source of all human emotions. (wikipedia.org)
  • citation needed] Jung included the ego in a broadly comprehensive theory of complexes, often referring to it as the ego-complex as illustrated when he said "by ego I understand a complex of ideas which constitutes the center of my field of consciousness and appears to possess a high degree of continuity and identity. (wikipedia.org)
  • Elliptic complexes isolate those features common to the de Rham complex and the Dolbeault complex which are essential for performing Hodge theory. (wikipedia.org)
  • Metal Dihydrogen and σ-Bond Complexes: Structure, Theory, and Reactivity (1 ed. (wikipedia.org)
  • Vaska's
  • Studies on Vaska's complex helped provide the conceptual framework for homogeneous catalysis. (wikipedia.org)
  • Vaska's complex undergoes oxidative addition with conventional oxidants such as halogens, strong acids such as HCl, and other molecules known to react as electrophiles, such as iodomethane (CH3I). (wikipedia.org)
  • kinetic
  • Modifying these residues or nucleotides has a large effect on the communication pathways in the protein:RNA complex consistent with kinetic data. (pnas.org)
  • myxomas
  • Individuals with Carney complex are at increased risk of developing noncancerous (benign) tumors called myxomas in the heart (cardiac myxoma) and other parts of the body. (nih.gov)
  • In Carney complex , myxomas have a tendency to recur after they are removed. (nih.gov)
  • common
  • A complex is a core pattern of emotions, memories, perceptions, and wishes in the personal unconscious organized around a common theme, such as power or status. (wikipedia.org)
  • Early in Jung's career, he developed the concept of the "complex", A "complex" meaning a personal unconscious, core pattern of emotions, memories, perceptions, and wishes organized around a common theme. (wikipedia.org)
  • centre
  • CoMPLEX is UCL's centre for interdisciplinary research in the medical and life sciences. (ucl.ac.uk)
  • Launched in 1998 as a virtual centre, CoMPLEX is now part of the Computer Science department in the Faculty of Engineering. (ucl.ac.uk)
  • A coordination complex whose centre is a metal atom is called a metal complex . (wikipedia.org)
  • The pre-Bötzinger complex (preBötC) is a cluster of interneurons in the ventral respiratory centre of the medulla of the brainstem. (wikipedia.org)
  • This complex forms approximately a 10 by 20 kilometres (6.2 mi × 12.4 mi) wide semicircle open to the southwest around the centre of the shield, which may reflect the existence of a ring fault on which the individual centres were emplaced. (wikipedia.org)
  • catalytic
  • Consistent with this analysis, there are a large number of suboptimal paths that can be used for communication between the identity elements on the tRNAs and the catalytic site in the aaRS:tRNA complexes. (pnas.org)
  • Biology
  • As an interdisciplinary domain, complex systems draws contributions from many different fields, such as the study of self-organization from physics, that of spontaneous order from the social sciences, chaos from mathematics, adaptation from biology, and many others. (wikipedia.org)
  • molecular
  • Community network analysis derived from molecular dynamics simulations is used to identify and compare the signaling pathways in a bacterial glutamyl-tRNA synthetase (GluRS):tRNA Glu and an archaeal leucyl-tRNA synthetase (LeuRS):tRNA Leu complex. (pnas.org)
  • Less commonly, the molecular pathogenesis of Carney complex is a variety of genetic changes at chromosome 2 (2p16). (wikipedia.org)
  • stability
  • A stability constant (formation constant, binding constant) is an equilibrium constant for the formation of a complex in solution. (wikipedia.org)
  • The stability constant(s) provide the information required to calculate the concentration(s) of the complex(es) in solution. (wikipedia.org)
  • PRKAR1A
  • Most mutations in the PRKAR1A gene that cause Carney complex result in an abnormal type 1 alpha subunit that is quickly broken down (degraded) by the cell. (nih.gov)
  • Some individuals with Carney complex do not have identified mutations in the PRKAR1A gene. (nih.gov)
  • Carney complex is most commonly caused by mutations in the PRKAR1A gene on chromosome 17 (17q23-q24) which may function as a tumor-suppressor gene. (wikipedia.org)
  • Adenosine (A) transition in the second codon position of the 74th codon in the protein) mutation in the PRKAR1A gene confirming the diagnosis of Carney complex. (wikipedia.org)
  • Mathematics
  • In mathematics, in particular in partial differential equations and differential geometry, an elliptic complex generalizes the notion of an elliptic operator to sequences. (wikipedia.org)
  • In mathematics, a cubical complex or cubical set is a set composed of points, line segments, squares, cubes, and their n-dimensional counterparts. (wikipedia.org)
  • intrinsic
  • Located within the ventrolateral medulla, the pre-Bötzinger complex contains subnetworks that hold distinct synapses and intrinsic membrane properties. (wikipedia.org)
  • 2016
  • CoMPLEX became part of the Computer Science department in the Faculty of Engineering in 1st August 2016. (ucl.ac.uk)
  • protein complex
  • Here, the authors describe pathogenic variants in the GatCAB protein complex genes required for the generation of glutaminyl-mt-tRNA Gln , that impairs mitochondrial translation and presents with cardiomyopathy. (nature.com)
  • tumor
  • Some people with Carney complex develop a rare tumor called psammomatous melanotic schwannoma. (nih.gov)
  • HAMLET (Human Alpha-lactalbumin Made LEthal to Tumor cells) is a complex between alpha-lactalbumin and oleic acid that induces cell death in tumor cells, but not in healthy cells. (wikipedia.org)
  • The mechanism of its entry is poorly understood, but recent studies indicate that the oleic acid in the HAMLET complex interacts with phosphatidylserine and o-glycosylated mucin on the plasma membrane, both of which are expressed in greater amounts on the plasma membrane of tumor cells, possibly providing for HAMLET's specificity. (wikipedia.org)
  • different
  • Each type of rhythm is generated by the same neurons in the pre-Bötzinger complex, but through different mechanisms, receptors, and ion currents that are controlled by changes in the behavior or environment of the organism. (wikipedia.org)
  • interactions
  • Complex systems are systems whose behavior is intrinsically difficult to model due to the dependencies, relationships, or interactions between their parts or between a given system and its environment. (wikipedia.org)
  • for this reason, complex systems can be understood as an alternative paradigm to reductionism , which attempts to explain systems in terms of their constituent parts and the individual interactions between them. (wikipedia.org)
  • Rhythmogenesis, the generation of rhythm, is modulated by membrane properties and synaptic interactions occurring in interneurons, intrinsically-bursting pacemaker neurons, and follower neurons within the pre-Bötzinger complex. (wikipedia.org)