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Methods based on statistical inference attempt to fit a generative model to the network data, which encodes the community structure. The overall advantage of this approach compared to the alternatives is its more principled nature, and the capacity to inherently address issues of statistical significance. Most methods ... | Wikipedia - Community structure | null | null | null |
Methods can be designed with the use of Situational method engineering. Situational method engineering can be described as the creation of an ad hoc method from fragments (method fragments) from known methods. This enables the creation of development methods to be me suitable for any development situation. In case of m... | Wikipedia - Mobile business development | null | null | null |
Situational method engineering can be used to combine these methods into one unified method that adopts the characteristics of mobile ICT services. The method fragments frequently used in mobile development are (6): Quality Function Deployment — Quality function deployment (QFD) is a structured methodology that incorpo... | Wikipedia - Mobile business development | null | null | null |
Brainstorm Techniques — The FBBM method uses some brainstorm techniques known for a long time in application development. They are used in development sessions. Financial Analysis — The methods incorporated in financial analysis are targeted at calculating the prospects of a firm. By including financial analysis method... | Wikipedia - Mobile business development | null | null | null |
Methods designed for hardware implementation generally do not scale to integers with thousands or millions of decimal digits; these frequently occur, for example, in modular reductions in cryptography. For these large integers, more efficient division algorithms transform the problem to use a small number of multiplica... | Wikipedia - Newton–Raphson algorithm | null | null | null |
Methods engineers typically work on projects involving new product design, products with a high cost of production to profit ratio, and products associated with having poor quality issues. Different methods of project selection include the Pareto analysis, fish diagrams, Gantt charts, PERT charts, and job/work site ana... | Wikipedia - Time and methods engineering | null | null | null |
Methods for measuring the two enantiomers are straightforward and include normal-phase liquid chromatography, liquid chromatography with a chiral column. However, since methods can be used to alter the two enantiomers, it may not be possible to distinguish tobacco-derived from synthetic nicotine simply by measuring the... | Wikipedia - Nicotine sulfate | null | null | null |
Methods for performing orthogonalization include: Gram–Schmidt process, which uses projection Householder transformation, which uses reflection Givens rotation Symmetric orthogonalization, which uses the Singular value decompositionWhen performing orthogonalization on a computer, the Householder transformation is usual... | Wikipedia - Orthogonalization | null | null | null |
Methods for the stereoselective synthesis of cyclopropanes from diazocarbonyl compounds and olefins have relied on either the use of pre-formed chiral rhodium catalysts or chiral auxiliaries on the diazocarbonyl compound. For example, Rh24 is a highly effective catalyst for the enantioselective cyclopropanation of alke... | Wikipedia - Intermolecular metal-catalyzed carbenoid cyclopropanations | null | null | null |
Methods for the synthesis of aromatic, organofluorine, heterocyclic and heteroatomic compounds. Study of properties and formation of organic, hybrid and polymer materials. Study of pharmacological properties and mechanisms of action of biologically active agents of natural and synthetic origin etc. | Wikipedia - Vorozhtsov Novosibirsk Institute of Organic Chemistry | null | null | null |
Methods from empirical algorithmics complement theoretical methods for the analysis of algorithms. Through the principled application of empirical methods, particularly from statistics, it is often possible to obtain insights into the behavior of algorithms such as high-performance heuristic algorithms for hard combina... | Wikipedia - Empirical algorithmics | null | null | null |
The former often relies on techniques and tools from statistics, while the latter is based on approaches from statistics, machine learning and optimization. Dynamic analysis tools, typically performance profilers, are commonly used when applying empirical methods for the selection and refinement of algorithms of variou... | Wikipedia - Empirical algorithmics | null | null | null |
Methods have been developed to purify DNA from organisms, such as phenol-chloroform extraction, and to manipulate it in the laboratory, such as restriction digests and the polymerase chain reaction. Modern biology and biochemistry make intensive use of these techniques in recombinant DNA technology. Recombinant DNA is ... | Wikipedia - DNA molecule | null | null | null |
Methods have been developed to see into the internal workings of the Sun and understand how the Earth's magnetosphere responds to solar activity. Further studies are concerned with exploring the full system of complex interactions that characterize the relationship of the Sun with the Solar System. According to NASA, u... | Wikipedia - NASA Heliophysics | null | null | null |
Recent advances in technology allow humans, for the first time, to realistically contemplate voyages beyond the Solar System.There are three primary objectives that define the multi-decadal studies needed: To understand the changing flow of energy and matter throughout the Sun, Heliosphere, and Planetary Environments. ... | Wikipedia - NASA Heliophysics | null | null | null |
To define the origins and societal impacts of variability in the Earth-Sun System. A combination of interrelated elements is used to achieve these objectives. They include complementary missions of various sizes; timely development of enabling and enhancing technologies; and acquisition of knowledge through research, a... | Wikipedia - NASA Heliophysics | null | null | null |
Methods of importance to cellular biology, such as fluorescence probes (e.g., FRAP, FRET and GFP) and imaging, will be covered as appropriate within the context of the content below. A. Cellular Compartments of Prokaryotes and Eukaryotes: Organization, Dynamics and Functions Cellular membrane systems (e.g., structure a... | Wikipedia - GRE Biochemistry, Cell and Molecular Biology Test | null | null | null |
Methods of multiplication were documented in the writings of ancient Egyptian, Greek, Indian, and Chinese civilizations. The Ishango bone, dated to about 18,000 to 20,000 BC, may hint at a knowledge of multiplication in the Upper Paleolithic era in Central Africa, but this is speculative. | Wikipedia - Capital-pi notation | null | null | null |
Methods of nuclear spectroscopy use properties of a nucleus to probe a material's properties, especially the material's local structure. Common methods include nuclear magnetic resonance spectroscopy (NMR), Mössbauer spectroscopy (MBS), and perturbed angular correlation (PAC). | Wikipedia - Instrumental chemistry | null | null | null |
Methods of statistical analysis in environmental sciences are as numerous as its applications. While there is a basis for the methods used in other fields, many of these methods must be adapted to suit the needs or limitations of data in environmental science. Linear regression models, generalized linear models, and no... | Wikipedia - Environmental statistics | null | null | null |
Methods to fit a phase type distribution to data can be classified as maximum likelihood methods or moment matching methods. Fitting a phase type distribution to heavy-tailed distributions has been shown to be practical in some situations. PhFit a C script for fitting discrete and continuous phase type distributions to... | Wikipedia - Phase-type distribution | null | null | null |
HyperStar was developed around the core idea of making phase-type fitting simple and user-friendly, in order to advance the use of phase-type distributions in a wide range of areas. It provides a graphical user interface and yields good fitting results with only little user interaction. jPhase is a Java library which c... | Wikipedia - Phase-type distribution | null | null | null |
Methods to infer process-based convergence fit models of selection to a phylogeny and continuous trait data to determine whether the same selective forces have acted upon lineages. This uses the Ornstein–Uhlenbeck process to test different scenarios of selection. Other methods rely on an a priori specification of where... | Wikipedia - Analogous structures | null | null | null |
Methods vary on the exact form the table for the bad-character rule should take, but a simple constant-time lookup solution is as follows: create a 2D table which is indexed first by the index of the character c in the alphabet and second by the index i in the pattern. This lookup will return the occurrence of c in P w... | Wikipedia - Boyer–Moore string-search algorithm | null | null | null |
Methods: 3D Motion capture analysis Force plates Force transducers Strain gauges Anthropometric measurements (mathematical models) Surface EMG (Electromyography) | Wikipedia - Sports biomechanics | null | null | null |
Methods: Neuroscience methods create artificial environments and thus cannot provide useful information about classroom contexts. Furthermore, the concern is that if neuroscience begins to influence educational practice too heavily, there may be a de-emphasis of contextual variables, and solutions to educational proble... | Wikipedia - Educational neuroscience | null | null | null |
Data: Knowing the brain region that supports an elementary cognitive function tells us nothing about how to design instruction for that function. However, Varma et al. suggest that neuroscience provide the opportunity for a novel analyses of cognition, breaking down behaviour into elements invisible at the behavioural ... | Wikipedia - Educational neuroscience | null | null | null |
For example, the question of whether different arithmetic operations show different speed and accuracy profiles is the result of different efficiency levels within one cognitive system versus the use of different cognitive systems. Reductionist Theories: Applying neuroscience terminology and theory to educational pract... | Wikipedia - Educational neuroscience | null | null | null |
Varma et al. point out that reductionism is a mode by which sciences are unified, and that the co-opting of neuroscience terminology does not necessitate the elimination of education terminology, it simply provides the opportunity for interdisciplinary communication and understanding. Philosophy: Education and neurosci... | Wikipedia - Educational neuroscience | null | null | null |
Methoxypyrazines Esters: Ethyl acetate is the most common ester in wine, being the product of the most common volatile organic acid — acetic acid, and the ethyl alcohol generated during the fermentation. Norisoprenoids, such as C13-norisoprenoids found in grape (Vitis vinifera) or wine, can be produced by fungal peroxi... | Wikipedia - Wine chemistry | null | null | null |
Methyl blue (phenyl]methylene]-2,5-cyclohexadien-1-ylidene]amino]-benzenesulfonic acid disodium salt) is distinctly different to methylene blue (-dimethylazanium;chloride) in structure, function and uses, and must not be confusedIts uses include staining histology samples for collagen, and for fungal structures. | Wikipedia - Methyl blue | null | null | null |
Methyl cellulose does not occur naturally and is synthetically produced by heating cellulose with caustic solution (e.g. a solution of sodium hydroxide) and treating it with methyl chloride. In the substitution reaction that follows, the hydroxyl residues (-OH functional groups) are replaced by methoxide (-OCH3 groups)... | Wikipedia - Methyl cellulose | null | null | null |
Methyl green is used commonly with bright-field, as well as fluorescence microscopes to dye the chromatin of cells so that they are more easily viewed. | Wikipedia - Biological stain | null | null | null |
Methyl mercury is a toxic substance to living organisms. The toxicity of methylmercury in humans is due to methyl mercury crossing the blood-brain barrier and causing cell lysis in the central nervous system. The cell damage is irreversible. The half-life of methylmercury in human tissue is 70 days, which allows it amp... | Wikipedia - Mercury methylation | null | null | null |
Methyl metabolism is very ancient and can be found in all organisms on earth, from bacteria to humans, indicating the importance of methyl metabolism for physiology. Indeed, pharmacological inhibition of global methylation in species ranging from human, mouse, fish, fly, roundworm, plant, algae, and cyanobacteria cause... | Wikipedia - Methylating agent | null | null | null |
Methylamine arises as a result of putrefaction and is a substrate for methanogenesis.Additionally, methylamine is produced during PADI4-dependent arginine demethylation. | Wikipedia - Methylamine | null | null | null |
Methylation is a widely characterized mechanism of genetic regulation that can determine biological traits. However, strong experimental evidences correlate methylation patterns in SNPs as an important additional feature for the classical activation/inhibition epigenetic dogma. Molecular interaction data, supported by ... | Wikipedia - Epigenetic landscape | null | null | null |
Methylation sometimes involve use of nucleophilic methyl reagents. Strongly nucleophilic methylating agents include methyllithium (CH3Li) or Grignard reagents such as methylmagnesium bromide (CH3MgX). For example, CH3Li will add methyl groups to the carbonyl (C=O) of ketones and aldehyde. : Milder methylating agents in... | Wikipedia - Purdie methylation | null | null | null |
Methylations are commonly performed using electrophilic methyl sources such as iodomethane, dimethyl sulfate, dimethyl carbonate, or tetramethylammonium chloride. Less common but more powerful (and more dangerous) methylating reagents include methyl triflate, diazomethane, and methyl fluorosulfonate (magic methyl). The... | Wikipedia - Purdie methylation | null | null | null |
Methylene blue is a formal derivative of phenothiazine. It is a dark green powder that yields a blue solution in water. The hydrated form has 3 molecules of water per unit of methylene blue. | Wikipedia - Methylene Blue | null | null | null |
Methylene blue is used to stain animal cells, such as human cheek cells, to make their nuclei more observable. Also used to stain blood films in cytology. | Wikipedia - Cell staining | null | null | null |
Methylergometrine, also known as d-lysergic acid 1-butanolamide, is a derivative of the ergoline and lysergamide classes and is structurally related to ergometrine (d-lysergic acid β-propanolamide) and lysergic acid diethylamide. == References == | Wikipedia - Methylergometrine | null | null | null |
Methylestradiol, or 17α-methylestradiol (17α-ME), also known as 17α-methylestra-1,3,5(10)-triene-3,17β-diol, is a synthetic estrane steroid and a derivative of estradiol. It is specifically the derivative of estradiol with a methyl group at the C17α positions. Closely related steroids include ethinylestradiol (17α-ethy... | Wikipedia - Methylestradiol | null | null | null |
Methylglyoxal is involved in the formation of advanced glycation end products (AGEs). In this process, methylglyoxal reacts with free amino groups of lysine and arginine and with thiol groups of cysteine forming AGEs. Histones are also heavily susceptible to modification by methylglyoxal and these modifications are ele... | Wikipedia - Methylglyoxal | null | null | null |
Methylglyoxal synthase provides an alternative catabolic pathway for triose phosphates created in glycolysis. It has activity levels similar to that of glyceraldehyde-3-phosphate dehydrogenase from glycolysis, suggesting an interplay between the two enzymes in the breakdown of triose phosphates. Indeed, MGS is strongly... | Wikipedia - Methylglyoxal synthase | null | null | null |
Methylphenidate (MPH), also known as Ritalin, is a stimulant that is used to treat attention-deficit hyperactivity disorder (ADHD). MPH is known to be highly abused by the general population, especially college students. In an online poll conducted by Nature magazine, 12.4% of 1400 corresponding readers admitted use of... | Wikipedia - Cognitive enhancement | null | null | null |
Their reasoning behind its use was for increasing concentration, sleep deficit, and jetlag.A comparison between the sales of MPH to the number of patients revealed a disproportionate ratio, indicating high abuse. MPH is believed to have a positive effect on memory consolidation, but studies have not been able to conclu... | Wikipedia - Cognitive enhancement | null | null | null |
Studies of MPH have reported improved problem-solving skills. However, when these studies were repeated to replicate the results, the placebo group scored higher, indicating that MPH may even impair performance.These inconclusive, and generally negative, results for memory improvement are insufficient to explain the us... | Wikipedia - Cognitive enhancement | null | null | null |
Methyltestosterone and ethyltestosterone (17α-ethyltestosterone) are the parent structures of all 17α-alkylated AAS. Major 17α-alkylated AAS include the testosterone derivatives fluoxymesterone, metandienone (methandrostenolone), and methyltestosterone and the DHT derivatives oxandrolone, oxymetholone, and stanozolol. | Wikipedia - Methyltestosterone | null | null | null |
Methyltestosterone, also known as 17α-methyltestosterone or as 17α-methylandrost-4-en-17β-ol-3-one, is a synthetic, 17α-alkylated androstane steroid and a derivative of testosterone differing from it only in the presence of a methyl group at the C17α position. Close synthetic relatives of methyltestosterone include met... | Wikipedia - Methyltestosterone | null | null | null |
Metiapine can be synthesized through the following mechanism: | Wikipedia - Metiapine | null | null | null |
Metiapine is a dibenzothiazepine derivative. Like clothiapine, metiapine has a sulfur atom replacing the nitrogen atom found in dibenzapine derivative antipsychotics like clozapine. | Wikipedia - Metiapine | null | null | null |
Metocean conditions refer to the combined wind, wave and climate (etc.) conditions as found on a certain location. They are most often presented as statistics, including seasonal variations, scatter tables, wind roses and probability of exceedance. The metocean conditions may include, depending on the project and its l... | Wikipedia - Metocean conditions | null | null | null |
Metolachlor has been detected in ground and surface waters in concentrations ranging from 0.08 to 4.5 parts per billion (ppb) throughout the U.S. It is classified as a Category C pesticide by the United States Environmental Protection Agency (US EPA), which indicates limited evidence of carcinogenicity. Evidence of the... | Wikipedia - Metolachlor | null | null | null |
Metolachlor induces cytotoxic and genotoxic effects in human lymphocytes. Genotoxic effects have also been observed in tadpoles exposed to metolachlor. Evidence also reveals that metolachlor affects cell growth. Cell division in yeast was reduced, and chicken embryos exposed to metolchlor showed a significant decrease ... | Wikipedia - Metolachlor | null | null | null |
Metoprolol contains a stereocenter and consists of two enantiomers. This is a racemate, i.e. a 1:1 mixture of (R)- and the (S)-form: | Wikipedia - Metoprolol | null | null | null |
Metoprolol was synthesized and its activity discovered in 1969. The specific agent in on-market formulations of metoprolol is either metoprolol tartrate or metoprolol succinate, where tartrate is an immediate-release formulation and the succinate is an extended-release formulation (with 100 mg metoprolol tartrate corre... | Wikipedia - Metoprolol | null | null | null |
Metribolone, also known as 17α-methyltrenbolone, as well as 17α-methyl-δ9,11-19-nortestosterone or 17α-methylestra-4,9,11-trien-17β-ol-3-one, is a synthetic estrane steroid and a 17α-alkylated derivative of nandrolone (19-nortestosterone). It is the C17α methylated derivative of trenbolone (δ9,11-19-nortestosterone) an... | Wikipedia - Metribolone | null | null | null |
Metric spaces embody a metric, a precise notion of distance between points. Every metric space can be given a metric topology, in which the basic open sets are open balls defined by the metric. This is the standard topology on any normed vector space. On a finite-dimensional vector space this topology is the same for a... | Wikipedia - Topological structure | null | null | null |
There are many ways of defining a topology on R , {\displaystyle \mathbb {R} ,} the set of real numbers. The standard topology on R {\displaystyle \mathbb {R} } is generated by the open intervals. The set of all open intervals forms a base or basis for the topology, meaning that every open set is a union of some collec... | Wikipedia - Topological structure | null | null | null |
In particular, this means that a set is open if there exists an open interval of non zero radius about every point in the set. More generally, the Euclidean spaces R n {\displaystyle \mathbb {R} ^{n}} can be given a topology. In the usual topology on R n {\displaystyle \mathbb {R} ^{n}} the basic open sets are the open... | Wikipedia - Topological structure | null | null | null |
Metric temporal logic is another extension of LTL that allows measurement of time. Instead of adding variables, it adds an infinity of operators U I {\displaystyle {\mathcal {U}}_{I}} and S I {\displaystyle {\mathcal {S}}_{I}} for I {\displaystyle I} an interval of non-negative number. The semantics of the formula ϕ U ... | Wikipedia - Timed propositional temporal logic | null | null | null |
Indeed, the MTL formula ϕ U I ψ {\displaystyle \phi \mathbin {\mathcal {U_{I}}} \psi } is equivalent to the TPTL formula x . ϕ ( x ∈ I ∧ ψ ) {\displaystyle x.\phi {\mathcal {(}}x\in I\land \psi )} where x {\displaystyle x} is a new variable.It follows that any other operator introduced in the page MTL, such as ◻ {\disp... | Wikipedia - Timed propositional temporal logic | null | null | null |
Over timed words, no MTL formula is equivalent to ◻ ( a ⟹ x . ◊ ( b ∧ ◊ ( c ∧ x ≤ 5 ) ) ) {\displaystyle \Box (a\implies x.\Diamond (b\land \Diamond (c\land x\leq 5)))} . Over signal, there are no MTL formula equivalent to x . ◊ ( a ∧ x ≤ 1 ∧ ◻ ( x ≤ 1 ⟹ ¬ b ) ) {\displaystyle x.\Diamond (a\land x\leq 1\land \Box (x\le... | Wikipedia - Timed propositional temporal logic | null | null | null |
Metric tensor Riemannian manifold Pseudo-Riemannian manifold Levi-Civita connection | Wikipedia - List of differential geometry topics | null | null | null |
Metrizable. A space is metrizable if it is homeomorphic to a metric space. Metrizable spaces are always Hausdorff and paracompact (and hence normal and Tychonoff), and first-countable. Moreover, a topological space (X,T) is said to be metrizable if there exists a metric for X such that the metric topology T(d) is ident... | Wikipedia - Topological invariant | null | null | null |
A space is called Polish if it is metrizable with a separable and complete metric. Locally metrizable. A space is locally metrizable if every point has a metrizable neighbourhood. | Wikipedia - Topological invariant | null | null | null |
MetroPCS has been accused of violating net neutrality by their proposed tiered cell phone data services. With some of these services being capped at a certain maximum, this violates various agreements for an open Internet. | Wikipedia - Tiered Internet service | null | null | null |
Metrology has wide-ranging impacts on a number of sectors, including economics, energy, the environment, health, manufacturing, industry, and consumer confidence. The effects of metrology on trade and the economy are two of its most-apparent societal impacts. To facilitate fair and accurate trade between countries, the... | Wikipedia - Metrological traceability | null | null | null |
A common measurement system and quality standards benefit consumer and producer; production at a common standard reduces cost and consumer risk, ensuring that the product meets consumer needs. Transaction costs are reduced through an increased economy of scale. Several studies have indicated that increased standardisat... | Wikipedia - Metrological traceability | null | null | null |
In the United Kingdom, an estimated 28.4 per cent of GDP growth from 1921 to 2013 was the result of standardisation; in Canada between 1981 and 2004 an estimated nine per cent of GDP growth was standardisation-related, and in Germany the annual economic benefit of standardisation is an estimated 0.72% of GDP.Legal metr... | Wikipedia - Metrological traceability | null | null | null |
Metrology is defined by the International Bureau of Weights and Measures (BIPM) as "the science of measurement, embracing both experimental and theoretical determinations at any level of uncertainty in any field of science and technology". It establishes a common understanding of units, crucial to human activity. Metro... | Wikipedia - Measurement standards laboratory | null | null | null |
Metropolis–Hastings algorithm gives identical results as Glauber algorithm does, but it is faster. In the Metropolis algorithm, selecting a spin is deterministic. Usually, one may select the spins one by one following some order, for example “typewriter order”. In the Glauber dynamic, however, every spin has an equal c... | Wikipedia - Glauber dynamics | null | null | null |
The Metropolis acceptance criterion also includes the Boltzmann weight, e − Δ E / T {\displaystyle e^{-\Delta E/T}} , but it always flips a spin in favor of lowering the energy, such that the spin-flip probability is: p ( Δ E ) = { 1 , Δ E ⩽ 0 e − Δ E / T , Δ E > 0 {\displaystyle p(\Delta E)=\left\{{\begin{matrix}1,\ \... | Wikipedia - Glauber dynamics | null | null | null |
For an Ising model on a 2d lattice, the critical temperature is T = 2.27 {\displaystyle T=2.27} . In practice, the main difference between the Metropolis–Hastings algorithm and with Glauber algorithm is in choosing the spins and how to flip them (step 4). However, at thermal equilibrium, these two algorithms should giv... | Wikipedia - Glauber dynamics | null | null | null |
In general, at equilibrium, any MCMC algorithm should produce the same distribution, as long as the algorithm satisfies ergodicity and detailed balance. In both algorithms, for any change in energy, p ( Δ E ) ≠ 0 {\displaystyle p(\Delta E)\neq 0} , meaning that transition between the states of the system is always poss... | Wikipedia - Glauber dynamics | null | null | null |
Detailed balance, which is a requirement of reversibility, states that if you observe the system for a long enough time, the system goes from state A {\displaystyle A} to B {\displaystyle B} with the same frequency as going from B {\displaystyle B} to A {\displaystyle A} . In equilibrium, the probability of observing t... | Wikipedia - Glauber dynamics | null | null | null |
Metropolitan Orlando sustains the world's largest recognized cluster of modeling, simulation and training companies. Located directly south of the main campus in the Central Florida Research Park, which is one of the largest research parks in the nation. Providing more than 10,000 jobs, the Research Park is the largest... | Wikipedia - University of Central Florida College of Engineering and Computer Science | null | null | null |
MeuKTX and BmKTX are members of the α-KTx subfamily which are evolutionarily conserved. Each member of this family consists of 23-42 amino acids with 3 or 4 disulfide bridges. These members share 68-97% sequence similarity and contain a specific sequence motif - AGMRFGKC. Typically, α-KTxs affect voltage-gated potassiu... | Wikipedia - MeuKTX | null | null | null |
MeuKTX is a peptide chain of 37 amino acids forming three disulfide bridges, resulting in the molecular weight of 3987 Da. The amino acid sequence of MeuKTX is VGINVKCKHS GQCLKPCKDA GMRFGKCMNG KCDCTPK. | Wikipedia - MeuKTX | null | null | null |
MeuKTX is an orthologue of BmKTX (α-KTx3.6) which is found in the closely related Mesobuthus martensii. These neurotoxins differ by a single amino acid at position 28 (Ile28Met). | Wikipedia - MeuKTX | null | null | null |
Mevalonic acid is a precursor in the biosynthetic pathway known as the mevalonate pathway that produces terpenes and steroids. Mevalonic acid is the primary precursor of isopentenyl pyrophosphate (IPP), that is in turn the basis for all terpenoids. Mevalonic acid is chiral and the (3R)-enantiomer is the only one that i... | Wikipedia - Mevalonic acid | null | null | null |
Mevalonic acid is very soluble in water and polar organic solvents. It exists in equilibrium with its lactone form, called mevalonolactone, that is formed by internal condensation of its terminal alcohol and carboxylic acid functional groups. Mevalonolactone acts to correct statin linked myopathy and limb girdle muscul... | Wikipedia - Mevalonic acid | null | null | null |
Meyniel graphs can be recognized in polynomial time, and several graph optimization problems including graph coloring that are NP-hard for arbitrary graphs can be solved in polynomial time for Meyniel graphs. == References == | Wikipedia - Meyniel graph | null | null | null |
Mg2+ is essential for plant growth and is present in higher plants in amounts on the order of 80 μmol g−1 dry weight. The amounts of Mg2+ vary in different parts of the plant and are dependent upon nutritional status. In times of plenty, excess Mg2+ may be stored in vascular cells (Stelzer et al., 1990; and in times of... | Wikipedia - Magnesium in biology | null | null | null |
(Kurvits and Kirkby, 1980; The structure of root cell walls is highly permeable to water and ions, and hence ion uptake into root cells can occur anywhere from the root hairs to cells located almost in the centre of the root (limited only by the Casparian strip). Plant cell walls and membranes carry a great number of n... | Wikipedia - Magnesium in biology | null | null | null |
Within individual plant cells, the Mg2+ requirements are largely the same as for all cellular life; Mg2+ is used to stabilise membranes, is vital to the utilisation of ATP, is extensively involved in the nucleic acid biochemistry, and is a cofactor for many enzymes (including the ribosome). Also, Mg2+ is the coordinati... | Wikipedia - Magnesium in biology | null | null | null |
Four compartments within the plant cell have reported interactions with Mg2+. Initially, Mg2+ will enter the cell into the cytoplasm (by an as yet unidentified system), but free Mg2+ concentrations in this compartment are tightly regulated at relatively low levels (≈2 mmol/L) and so any excess Mg2+ is either quickly ex... | Wikipedia - Magnesium in biology | null | null | null |
Mg2+ is the coordinating metal ion in the chlorophyll molecule, and in plants where the ion is in high supply about 6% of the total Mg2+ is bound to chlorophyll. Thylakoid stacking is stabilised by Mg2+ and is important for the efficiency of photosynthesis, allowing phase transitions to occur.Mg2+ is probably taken up ... | Wikipedia - Magnesium in biology | null | null | null |
Deshaies et al. had stated in their paper that older pea chloroplasts showed less significant changes in Mg2+ content than those used to form their conclusions. The relative proportion of immature chloroplasts present in the preparations may explain these observations. The metabolic state of the chloroplast changes con... | Wikipedia - Magnesium in biology | null | null | null |
During the day, the chloroplast is actively harvesting the energy of light and converting it into chemical energy. The activation of the metabolic pathways involved comes from the changes in the chemical nature of the stroma on the addition of light. H+ is pumped out of the stroma (into both the cytoplasm and the lumen... | Wikipedia - Magnesium in biology | null | null | null |
Mg2+ (along with K+) is released from the lumen into the stroma, in an electroneutralisation process to balance the flow of H+. Finally, thiol groups on enzymes are reduced by a change in the redox state of the stroma. | Wikipedia - Magnesium in biology | null | null | null |
Examples of enzymes activated in response to these changes are fructose 1,6-bisphosphatase, sedoheptulose bisphosphatase and ribulose-1,5-bisphosphate carboxylase. During the dark period, if these enzymes were active a wasteful cycling of products and substrates would occur. Two major classes of the enzymes that intera... | Wikipedia - Magnesium in biology | null | null | null |
Firstly, enzymes in the glycolytic pathway most often interact with two atoms of Mg2+. The first atom is as an allosteric modulator of the enzymes' activity, while the second forms part of the active site and is directly involved in the catalytic reaction. The second class of enzymes includes those where the Mg2+ is co... | Wikipedia - Magnesium in biology | null | null | null |
Mg2+ is the fourth-most-abundant metal ion in cells (per moles) and the most abundant free divalent cation — as a result, it is deeply and intrinsically woven into cellular metabolism. Indeed, Mg2+-dependent enzymes appear in virtually every metabolic pathway: Specific binding of Mg2+ to biological membranes is frequen... | Wikipedia - Magnesium in biology | null | null | null |
Mibolerone, also known as 7α,17α-dimethyl-19-nortestosterone (DMNT) or as 7α,17α-dimethylestr-4-en-17β-ol-3-one, is a synthetic estrane steroid and a 17α-alkylated derivative of nandrolone (19-nortestosterone). It is the 17α-methyl derivative of trestolone (7α-methyl-19-nortestosterone; MENT). Other related AAS include... | Wikipedia - Mibolerone | null | null | null |
Mice without (Opn4aDTA/aDTA mice) are not susceptible to the negative effects of an aberrant light cycle, indicating that light information transmitted through these cells plays an important role in regulation of mood and cognitive functions such as learning and memory. | Wikipedia - Biological rhythms | null | null | null |
Mice, rats, and related species occasionally comprise an important portion of the golden eagle's diet, making up 3.05% of prey throughout the range. Most mouse-sized mammals are too small to serve as regular prey, but in marginal habitats, they can become more important, with studies revealing they sometimes form more ... | Wikipedia - Dietary biology of the golden eagle | null | null | null |
For the most part, foxes are the preferred prey. In a nest in Mongolia, Corsac fox (Vulpes corsac) were surprisingly the main prey species, making up 38% of sampled remains. Kit fox (Vulpes macrotis), swift fox (Vulpes velox), gray fox (Urocyon cinereoargenteus) and island fox (Urocyon littoralis) are readily predated ... | Wikipedia - Dietary biology of the golden eagle | null | null | null |
In Fennoscandia, golden eagles prey on Arctic foxes (Vulpes lagopus). Across much of both species' ranges, red foxes (Vulpes vulpes) co-exist with golden eagles and eagles hunt them occasionally. Red foxes make up 13.5% of nest remains in Sicily and 5.9% in the Republic of Macedonia. | Wikipedia - Dietary biology of the golden eagle | null | null | null |
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