Chemistry terminology · MLC-0109

Chemistry terms: N (468)

• NACHT domain-, leucine-rich repeat (LRR)-, and pyrin (N-terminal homology) domain (PYD)-containing protein 3An intracellular sensor protein that detects a wide array of microbial motifs, endogenous danger signals, and...
• Naïve lymphocyteA lymphocyte that has not yet encountered its specific antigen and therefore has not been activated. These...
• NanoA prefix indicating a factor of 10^-9, used in the International System of Units (SI) to denote a submultiple...
• NanocapsuleA polymeric nanostructure characterized by a hollow core surrounded by a shell, typically ranging in size...
• NanocompositeA multiphase material where at least one of the constituent phases has at least one dimension in the...
• NanodomainA region within a material, typically a polymer, that exhibits distinct physical or chemical properties and...
• Nanodomain morphologyThe spatial arrangement and shape of distinct regions within a material where at least one dimension is on...
• NanoelectrodeAn electrode with at least one dimension on the nanometer scale, typically less than 100 nanometers. This...
• Nanoelectromechanical systemsDevices that integrate electrical and mechanical components at the nanoscale, exhibiting dimensions generally...
• NanoelectronicsThe field of electronics concerned with the design and fabrication of electronic components and systems with...
• NanoelectrosprayA low-flow-rate variant of electrospray ionization where the analyte solution is passed through a capillary...
• NanoencapsulationThe process of enclosing active substances within a nanoscale shell or matrix, typically ranging from 1 to...
• NanofiltrationA pressure-driven membrane separation process that removes multivalent ions, organic molecules, and small...
• NanogelA crosslinked polymer network with dimensions in the nanometer range, typically between 10 and 200...
• Nanoimprint lithographyA method for creating nanoscale patterns by mechanically deforming a resist material with a hard mold or...
• NanolithographyThe fabrication of structures with at least one dimension in the nanometer scale, typically between 1 and 100...
• NanomaterialA material with at least one dimension in the nanoscale, typically ranging from 1 to 100 nanometers. These...
• NanoparticleA particle of matter with one or more external dimensions in the size range from approximately 1 to 100...
• NanopatternA two-dimensional or three-dimensional arrangement of features where at least one dimension of the features...
• NanophotonicsThe study of light-matter interactions at the nanoscale, where the dimensions of the structures are...
• Nanoporous polymer crystalA crystalline polymer material containing a network of interconnected pores with dimensions in the nanometer...
• Nanoscopic filmA thin film with at least one dimension in the nanometer range, typically between 1 and 100 nanometers. These...
• Nanoscopic polymer filmA polymer film with a thickness in the nanometer range, where at least one dimension is between 1 and 100...
• NanosphereA nano-object with three external dimensions in the nanoscale, possessing a spherical or spheroidal shape...
• Nanosphere lithographyA nanofabrication technique that employs a monolayer of close-packed nanospheres as a mask for patterning...
• NanostructureA material or component possessing at least one dimension in the nanoscale, typically between 1 and 100...
• NanotechnologyThe design, characterization, production, and application of structures, devices, and systems by controlling...
• NanotoxicologyThe study of the adverse effects of nanomaterials on living organisms and the environment. This field...
• NaphthenesA class of saturated cyclic hydrocarbons, also known as cycloalkanes. These compounds consist of carbon atoms...
• Naphthenic acidsA complex mixture of carboxylic acids containing at least one cycloalkane ring, such as cyclopentane or...
• Napierian absorbanceA measure of the attenuation of radiant power as it passes through a sample, calculated using the natural...
• Narcissistic reactionA chemical reaction where the product is structurally identical to the reactant, but the atoms or groups have...
• NarcosisA state of stupor, unconsciousness, or arrested activity produced by the action of a chemical substance...
• NarcoticA drug that produces analgesia (pain relief), stupor, and sleep. In its precise pharmacological sense, the...
• NasalRelating to or situated in the nose. This anatomical term describes structures, functions, or substances...
• NatalityThe birth rate within a population, typically expressed as the number of live births per 1,000 individuals...
• National Academy of Sciences paradigm of risk assessmentA structured framework for evaluating potential health risks from environmental hazards, consisting of four...
• NatriureticDescribing a substance or process that promotes the renal excretion of sodium ions, leading to an increase in...
• Natural atomic orbitalA set of localized atomic orbitals derived from a molecular wave function through a transformation that...
• Natural autoantibodiesImmunoglobulin molecules produced by the immune system without prior exogenous antigenic stimulation. These...
• Natural bond orbitalA localized orbital derived from a natural orbital analysis, representing the Lewis-like bonding structure of...
• Natural broadeningThe intrinsic broadening of spectral lines due to the finite lifetime of the excited states involved in a...
• Natural graphiteA naturally occurring crystalline form of carbon, characterized by its layered structure where carbon atoms...
• Natural hybrid orbitalA hybrid orbital obtained from a natural orbital analysis, which describes the bonding within a molecule in...
• Natural immunityThe inherent, non-specific defense mechanisms of an organism against pathogens and foreign substances...
• Natural isotopic abundanceThe relative proportion of each stable isotope of an element as it occurs in nature. These abundances are...
• Natural killer cellA type of lymphocyte that belongs to the innate immune system and can recognize and kill target cells, such...
• Natural killer cell activity assayAn in vitro method for measuring the cytotoxic capacity of natural killer (NK) cells, a component of the...
• Natural killer T cellA specialized subset of T lymphocytes that express both T-cell receptors and markers characteristic of...
• Natural latexA milky white colloidal dispersion of rubber particles in an aqueous serum, exuded by certain plants, most...
• Natural linewidthThe minimum possible spectral linewidth of an atomic or molecular transition, determined by the intrinsic...
• Natural occurrenceThe presence of a substance in the environment or in living organisms as a result of natural processes...
• Natural orbitalA set of one-electron wavefunctions that diagonalize the one-particle density matrix of a many-electron...
• Natural photosynthesisThe biological process that converts light energy into chemical energy, which is stored in the bonds of...
• Natural population analysisA method for partitioning the total electron density of a molecule among its constituent atoms, based on...
• Natural productA chemical substance or compound produced by a living organism, found in nature. These compounds are often...
• Natural radiationIonizing radiation originating from natural sources, rather than from human activities. This includes cosmic...
• Natural radiation backgroundThe persistent level of ionizing radiation present in the environment from natural sources, without the...
• Natural radioactivityThe spontaneous disintegration of atomic nuclei of naturally occurring radionuclides, resulting in the...
• Natural resistance-associated macrophage proteinA transmembrane protein found in the phagolysosomal membrane of macrophages and other phagocytic cells...
• Natural selectionThe process whereby organisms with heritable traits that are better adapted to their environment tend to...
• Near edge X-ray absorption fine structureThe fine structure observed in an X-ray absorption spectrum at energies just above an absorption edge...
• Near-field scanning optical microscopyA super-resolution microscopy technique that overcomes the diffraction limit of light by scanning a...
• Near-infrared radiationElectromagnetic radiation with wavelengths longer than visible light but shorter than mid-infrared radiation...
• NebulizationThe process of converting a liquid sample into a fine aerosol or mist of small droplets. This is achieved by...
• NebulizerA device that transforms a liquid sample into a fine aerosol or mist of small droplets. It operates by using...
• NecropsyA post-mortem examination of an animal to determine the cause of death, assess the extent of disease, or...
• NecrosisA form of cell death that occurs as a result of acute cellular injury, characterized by cell swelling...
• Needle cokeA high-quality, highly crystalline form of petroleum coke characterized by its acicular (needle-like)...
• Needle trapA sampling device consisting of a hollow needle packed with a sorbent material, used for the extraction and...
• Negative adsorptionA phenomenon where the concentration of a solute in the interfacial layer between two phases is lower than...
• Negative assay controlA sample or treatment in a biomolecular screening assay that is not expected to produce a positive response...
• Negative hyper-conjugationThe delocalization of electron density from a filled bonding orbital to an adjacent empty antibonding...
• Negative ionAn atom or molecule that has acquired a net negative electric charge by gaining one or more electrons. Also...
• Negative ion chemical ionizationA mass spectrometry ionization technique where analyte molecules react with negatively charged reagent ions...
• Negative selectionThe immunological process by which developing T lymphocytes and B lymphocytes that recognize and bind...
• Negative-ion yieldThe ratio of the number of negative ions detected to the total number of particles (atoms or molecules)...
• Negative-tone developmentA lithographic process where the exposed regions of a photoresist become insoluble and remain on the...
• Neglected diseaseA disease that predominantly affects impoverished populations in developing regions and for which there are...
• Negligible riskA level of risk that is so small it is considered acceptable or trivial, and therefore does not warrant...
• Neighbouring group participationThe acceleration of a reaction rate due to the involvement of a functional group within the same molecule...
• NektonThe group of aquatic organisms that can actively swim and move independently of water currents, as opposed to...
• NematicideA substance or chemical agent specifically formulated to kill nematodes, which are microscopic, worm-like...
• NeoantigenA new antigen that is not present in the normal host genome and arises from somatic mutations within tumor...
• NeocortexThe most recently evolved part of the cerebral cortex in the mammalian brain, responsible for higher-order...
• neo-DarwinismA modern synthesis of evolutionary theory that combines Charles Darwin's concept of natural selection with...
• Neodymium laserA type of solid-state laser that uses neodymium ions as the active laser medium, typically doped into a...
• NeoflavansA class of natural phenolic compounds based on the 4-phenylchroman skeleton, which distinguishes them from...
• NeoflavonesA class of flavonoids characterized by a 4-arylcoumarin (or 4-aryl-2H-1-benzopyran-2-one) skeleton. These...
• Neonatal toleranceThe state of immunological unresponsiveness to specific antigens induced when an individual is exposed to...
• NeonateA newborn organism, specifically referring to a human infant during the first 28 days of life. This period is...
• NeophyteA non-native plant species that has been introduced into a geographical region to which it is not indigenous...
• NeoplasiaThe uncontrolled and abnormal proliferation of cells, leading to the formation of a tumor or lesion. This...
• NeoplasmAn abnormal mass of tissue resulting from uncontrolled cell growth, which can be either benign or malignant...
• NeperA logarithmic unit used to express ratios of quantities, particularly power or field amplitude ratios, in a...
• NephelometryA technique for measuring the concentration of suspended particulate matter in a fluid by detecting the...
• NephritisInflammation of the kidney, which can affect the glomeruli, tubules, or interstitial tissue. This condition...
• NephrosisA non-inflammatory degenerative disease of the renal tubules in the kidneys, distinct from nephritis which...
• NephrotoxicDescribing a substance or agent that is poisonous or damaging to the kidneys. Exposure to nephrotoxic...
• Nernst equationA mathematical relationship that describes the equilibrium electrode potential of an electrochemical...
• Nernstian responseThe behavior of an ion-selective electrode or electrochemical cell where the electrode potential changes...
• Nernst's diffusion layerA hypothetical, stationary layer of fluid adjacent to a solid surface, such as an electrode, where mass...
• NerveA bundle of nerve fibers, or axons, located outside the central nervous system, that transmits electrical...
• Nerve conduction studyA diagnostic test that measures the speed and strength of electrical signals as they travel along a nerve...
• Nerve conduction velocityThe speed at which an electrochemical signal, or action potential, travels along the axon of a neuron. This...
• Nerve fiberA slender, elongated projection of a nerve cell, or neuron, that transmits electrical impulses. It consists...
• Nerve gasA volatile organophosphorus compound that acts as a potent neurotoxin by inhibiting the enzyme...
• Nerve growth factorA type of neurotrophin, a protein that promotes the growth, maintenance, and survival of neurons. It is...
• Nerve rootThe initial segment of a spinal nerve as it emerges from the spinal cord, consisting of a dorsal (sensory)...
• Nervous systemThe complex network of nerves and specialized cells, known as neurons, that transmit signals between...
• NetDescribing a quantity that represents the final result after accounting for all contributing and opposing...
• Net absorption cross-sectionA measure of the effective area that a molecule or atom presents to incident radiation for absorption...
• Net currentThe algebraic sum of all individual currents flowing across an interface or through a circuit element. In...
• Net dephasing timeA time constant, symbolized as T2, that characterizes the decay of the transverse magnetization of a spin...
• Net electric chargeThe algebraic sum of all positive and negative elementary charges present within a given system or on a...
• Net faradaic currentThe total current flowing across an electrode-solution interface that is directly associated with electron...
• Net reproductive rateThe average number of female offspring produced by a female during her lifetime, taking into account survival...
• Net shapingA fabrication process for a ceramic or composite material where the desired final shape is achieved directly...
• NetworkA highly ramified macromolecule in which each constitutional unit is connected to every other constitutional...
• Network defectAn imperfection in the ideal structure of a polymer network, such as unreacted functional groups, dangling...
• Network polymerA polymer in which all polymer chains are interconnected to form a single macroscopic entity, often through...
• Network-chain molar massThe average molar mass of the polymer chains between two adjacent cross-link points in a polymer network...
• Neural activityThe electrical and chemical signaling processes occurring within neurons and between neural networks. This...
• Neural archThe posterior part of a vertebra that encloses the spinal cord, forming a protective bony ring. It consists...
• Neural crestA transient, multipotent cell population that arises from the dorsal neural tube during vertebrate embryonic...
• Neural networkAn interconnected system of neurons in the brain or spinal cord that processes and transmits information...
• Neural plateA thickened ectodermal structure that forms during early embryonic development, serving as the precursor to...
• Neural stem cellAn undifferentiated cell found in the nervous system that possesses the capacity for self-renewal and can...
• Neural tubeA hollow structure formed during embryonic development from the folding and fusion of the neural plate, which...
• Neural tube defectA birth defect resulting from the incomplete closure of the neural tube during early embryonic development...
• NeuralgiaSevere, often paroxysmal pain that occurs along the course of a nerve, without stimulation of the nerve's...
• NeurectomyThe surgical removal or resection of part of a nerve, performed to alleviate intractable pain or to treat...
• NeuriteAny projection extending from the cell body of a neuron. During development, a neurite is an undifferentiated...
• Neurite outgrowthThe process by which developing neurons project new extensions, known as neurites, which later differentiate...
• NeuritisInflammation of a nerve or a group of nerves, which can lead to pain, weakness, numbness, or paralysis in the...
• Neurobehavior core test batteryA standardized set of tests designed to assess the behavioral and neurological functions of an individual...
• NeurobehavioralRelating to the interaction between the nervous system and observable behavior. This field investigates how...
• NeuroblastAn immature, dividing cell that is a precursor to a neuron or, in some cases, a glial cell. Neuroblasts...
• NeuroblastomaA malignant tumor that arises from immature nerve cells, or neuroblasts, most frequently originating in the...
• Neurodegenerative diseaseA group of disorders characterized by the progressive loss of structure or function of neurons, leading to...
• Neurodevelopmental toxicityAdverse effects on the developing nervous system resulting from exposure to chemical, physical, or biological...
• NeuroectodermA specialized region of the embryonic ectoderm that gives rise to the entire nervous system, including the...
• NeuroendocrineRelating to the interaction between the nervous system and the hormone-secreting endocrine system...
• Neuroendocrine systemA network of specialized cells, called neurosecretory cells, that link the nervous system with the endocrine...
• NeurofibrilA fine, thread-like structure found within the cytoplasm of neurons, particularly in the axon and dendrites...
• Neurofibrillary tangleAn intracellular aggregate of hyperphosphorylated tau protein that accumulates inside neurons in certain...
• NeurofibromaA benign tumor that arises from the Schwann cells of the peripheral nervous system. These tumors can occur as...
• NeurofilamentA type of intermediate filament, approximately 10 nm in diameter, found in the cytoplasm of neurons. These...
• NeurogenesisThe biological process by which new neurons are generated from neural stem cells and progenitor cells. This...
• Neurogenic shockA life-threatening medical condition characterized by severe hypotension and bradycardia, resulting from a...
• NeurohypophysisThe posterior section of the pituitary gland, composed of neural tissue. It does not synthesize its own...
• NeuroimagingA set of techniques used to visualize the structure, function, or pharmacology of the nervous system...
• NeuroinflammationAn inflammatory response occurring within the brain or spinal cord, involving the activation of glial cells...
• NeurolepticA class of psychotropic drugs, also known as antipsychotics, used primarily to manage psychosis, including...
• NeurolysisThe chemical or surgical destruction of nerve tissue to relieve pain or spasticity. This procedure involves...
• NeuromaA disorganized growth or tumor of nerve tissue that forms after a nerve is cut or damaged. It is not a true...
• NeuronA fundamental cell type of the nervous system responsible for transmitting electrical and chemical signals...
• NeuronopathyA pathological condition characterized by the degeneration or death of the neuronal cell body itself, rather...
• Neuron-specific enolaseA glycolytic enzyme, specifically the gamma-gamma (γγ) or alpha-gamma (αγ) dimeric forms of enolase, found...
• Neuropathic painChronic pain arising from damage or dysfunction of the somatosensory nervous system. This type of pain is...
• Neuropathological examinationThe macroscopic and microscopic assessment of nervous system tissues, typically post-mortem, to identify...
• NeuropathyDamage or dysfunction of one or more nerves, resulting in numbness, tingling, muscle weakness, and pain in...
• Neuropathy target esteraseAn enzyme found in the nervous system that is a primary target for certain organophosphate compounds, leading...
• NeuropeptideA type of peptide that functions as a neurotransmitter, neuromodulator, or neurohormone within the nervous...
• NeuroporeAn opening at either the cranial (anterior) or caudal (posterior) end of the neural tube during embryonic...
• Neuroprogenitor cellA type of multipotent stem cell found in the nervous system that is committed to the neural lineage. These...
• NeuroprotectiveDescribing a substance or mechanism that shields neurons from damage or degeneration, thereby preserving...
• Neuropsychological testingA standardized assessment of cognitive and behavioral functions associated with the brain, administered to...
• NeurotoxicDescribing a substance or agent that is poisonous or destructive to nerve tissue, causing damage to the...
• Neurotoxic esterase assayA biochemical test used to measure the activity of neuropathy target esterase (NTE) in nervous tissue...
• Neurotoxic shellfish poisoningAn illness caused by consuming shellfish contaminated with brevetoxins, potent neurotoxins produced by...
• NeurotoxicantA substance that produces an adverse effect on the structure or function of the central or peripheral nervous...
• NeurotoxicologyThe scientific discipline that studies the adverse effects of chemical, biological, or physical agents on the...
• NeurotoxinA poisonous substance that acts specifically on nerve cells, disrupting their normal function or causing...
• NeurotransmissionThe process of transferring a signal from one neuron to another across a synapse, or from a neuron to a...
• NeurotransmitterA chemical messenger that transmits signals across a chemical synapse from one neuron to another target cell...
• NeurotrophinA family of proteins that function as growth factors, promoting the survival, development, and function of...
• NeurotropicRelating to a substance, organism, or agent that exhibits an affinity for, or preferentially acts on, nervous...
• NeurotubuleA hollow, cylindrical protein filament found within the cytoplasm of neurons, composed primarily of tubulin...
• NeurovascularRelating to the functional and structural relationship between the nervous system and the circulatory system...
• NeurulationThe process in vertebrate embryonic development where the neural plate folds to form the neural tube, which...
• Neutral antagonistA type of receptor antagonist that binds to a receptor but does not activate it, nor does it affect the basal...
• Neutral lossThe fragmentation process in mass spectrometry where a neutral molecule, such as water, ammonia, or carbon...
• Neutral loss scanA mass spectrometry scanning mode where the mass spectrometer detects all precursor ions that undergo a...
• NeutralizationThe inhibition of the biological activity of a soluble substance or a microorganism, such as a toxin or...
• Neutralization-reionization mass spectrometryA mass spectrometry technique where ions are first neutralized to form neutral species, which then pass...
• Neutralized gelA gel formed by the neutralization of a polyelectrolyte solution, where the charges on the polymer chains are...
• NeutrinoAn elementary subatomic particle with no electric charge and a very small, non-zero mass. As a lepton, it...
• NeutronAn elementary particle found in the nucleus of an atom that carries no net electric charge. Along with...
• Neutron activation analysisA nuclear analytical technique used for determining the elemental composition of materials by irradiating a...
• Neutron densityThe number of neutrons per unit volume within a given material or region. This parameter is a measure of the...
• Neutron depth profilingA non-destructive analytical technique that uses a beam of thermal neutrons to determine the concentration...
• Neutron diffraction analysisA technique that determines the atomic and magnetic structure of materials by observing the interference...
• Neutron energyThe kinetic energy possessed by a neutron, which determines its interaction characteristics with matter...
• Neutron multiplicationThe process in which neutrons cause nuclear fissions, which in turn release more neutrons, leading to a...
• Neutron numberThe total count of neutrons present in the nucleus of an atom, denoted by the symbol N. This number, along...
• Neutron rest massThe invariant mass of a neutron when it is at rest, representing its intrinsic mass independent of its...
• Neutron scattering analysisA family of techniques that probe the structure and dynamics of materials by observing how neutrons interact...
• Neutron temperatureA concept used to describe the average kinetic energy of a population of neutrons in thermal equilibrium with...
• NeutropeniaA condition characterized by an abnormally low concentration of neutrophils, a type of white blood cell, in...
• NeutrophilA type of granulocyte, and the most abundant white blood cell in humans, playing a primary role in the innate...
• Neutrophil activationA series of cellular responses initiated when a neutrophil is stimulated by inflammatory signals, preparing...
• Neutrophilic organismsMicroorganisms that grow and thrive in environments with a neutral or near-neutral pH. Their internal...
• New chemical entityA drug that contains an active moiety not previously approved by a particular regulatory authority for...
• New molecular entityA drug substance containing no active moiety that has been approved by the Food and Drug Administration (FDA)...
• Newman projectionA representation of a molecule's conformation viewed along a specific carbon-carbon bond, where the front...
• NewtonThe SI unit of force, defined as the force required to accelerate a mass of one kilogram at a rate of one...
• Newton black filmA very thin liquid film, typically formed from aqueous solutions of surfactants, that exhibits a uniform...
• Newton diagramA graphical representation used in reaction dynamics to analyze the kinematics of a bimolecular collision. It...
• Newtonian fluidA fluid whose shear stress is directly proportional to the shear rate, with the constant of proportionality...
• NG2 cellA type of glial cell in the central nervous system that expresses the neural glial antigen 2 (NG2)...
• NicheThe set of environmental conditions, including physical, chemical, and biological factors, that allow a...
• Niche preemptionA process in ecology where an early-arriving species or individual establishes itself in a habitat and...
• Niche widthA measure of the range of resources or environmental conditions that a species or population can tolerate and...
• NicotinicRelating to or resembling the effects of nicotine, particularly concerning its action on specific...
• Nicotinic receptorA type of cholinergic receptor that responds to the neurotransmitter acetylcholine and is also activated by...
• Nido-A prefix used in inorganic nomenclature to describe a cluster compound that has a cage structure derived from...
• Nier-Johnson geometryA specific ion optical configuration used in double-focusing mass spectrometers, combining a magnetic sector...
• NIH shiftAn intramolecular migration of a hydrogen atom or other substituent during the enzymatic hydroxylation of an...
• Nikolsky-Eisenman equationAn extension of the Nernst equation that describes the potential of an ion-selective electrode when...
• Nimbostratus cloudA dark, diffuse, gray cloud layer that covers the entire sky and produces continuous precipitation, either...
• Nine aspects of disease associationA set of criteria used to evaluate the likelihood of a causal relationship between an exposure and a disease...
• Nine-hole box testA behavioral test used in neurotoxicology to assess motor coordination, fine motor skills, and exploratory...
• NippleA raised projection on the surface of the mammary gland, containing the openings of the lactiferous ducts. It...
• Nissl bodyA large granular structure found in the cytoplasm of neurons, composed of rough endoplasmic reticulum and...
• NitraminesOrganic compounds containing a nitro group (-NO2) directly attached to a nitrogen atom of an amine functional...
• NitrenesHighly reactive intermediates containing a neutral, monovalent nitrogen atom that possesses a total of six...
• Nitrenium ionsCationic intermediates containing a monovalent nitrogen atom with only four valence electrons, making them...
• Nitric oxideA gaseous signaling molecule with the chemical formula NO, produced endogenously by nitric oxide synthase...
• NitrificationThe biological oxidation of ammonia to nitrite, followed by the oxidation of the nitrite to nitrate. This...
• Nitrile imidesUnsaturated 1,3-dipolar compounds characterized by a nitrogen atom triply bonded to a carbon atom, which is...
• Nitrile oxidesUnsaturated 1,3-dipolar compounds containing a nitrogen atom triply bonded to a carbon atom, which is also...
• Nitrile sulfidesUnsaturated 1,3-dipolar compounds featuring a nitrogen atom triply bonded to a carbon atom, which is also...
• Nitrile ylidesUnsaturated 1,3-dipolar compounds characterized by a nitrogen atom triply bonded to a carbon atom, which is...
• NitrilesOrganic compounds containing a cyano functional group, which consists of a carbon atom triply bonded to a...
• Nitrilium betainesA class of 1,3-dipolar compounds that are resonance-stabilized zwitterionic species with a formal positive...
• Nitrilium ionsCations characterized by a nitrogen atom triply bonded to a carbon atom, with a positive charge formally...
• NitriminesOrganic compounds containing a nitrosoimino group, which consists of a nitrogen atom double-bonded to another...
• Nitro compoundsOrganic compounds containing one or more nitro groups (-NO2) covalently bonded to a carbon atom. These...
• Nitrogen fixationThe process by which atmospheric dinitrogen (N2) is converted into ammonia (NH3) or other nitrogenous...
• Nitrogen laserA gas laser that uses molecular nitrogen as the active medium to produce coherent light. It operates by...
• Nitrogen ruleA principle in mass spectrometry stating that a molecule containing an odd number of nitrogen atoms will have...
• Nitrolic acidsOrganic compounds characterized by the general structure R-C(NO2)=NOH, where R represents an alkyl or aryl...
• NitronesA class of organic compounds containing the C=N(O)R functional group, where the nitrogen atom is oxidized and...
• NitrosamidesOrganic compounds containing a nitroso group (-NO) attached to the nitrogen atom of an amide functional group...
• NitrosaminesOrganic compounds characterized by the presence of a nitroso group (-N=O) attached to a nitrogen atom of an...
• Nitrosative stressA condition characterized by an imbalance between the production of reactive nitrogen species and the ability...
• NitrosiminesOrganic compounds characterized by the presence of a nitroso group (-NO) attached to an imine nitrogen, with...
• Nitroso compoundsOrganic compounds containing a nitroso functional group (-NO) covalently bonded to a carbon atom or a...
• Nitrosolic acidsOrganic compounds containing both a nitroso group and a hydroxylimino group on the same carbon atom, with the...
• N-methyl-D-aspartateA synthetic amino acid that acts as a specific agonist for the N-methyl-D-aspartate receptor, a type of...
• N-methyl-D-aspartate-type glutamate receptorA specific subtype of ionotropic glutamate receptor that is a ligand-gated ion channel, activated by the...
• NMR exchange spectroscopyA nuclear magnetic resonance (NMR) technique designed to detect and quantify chemical exchange processes...
• N-nucleotidesNucleotides that are randomly added to the junctions between gene segments during the somatic recombination...
• "No action" alternativeA baseline option in an environmental risk assessment or management plan where no new remedial or control...
• No carrier addedA designation for a radionuclide preparation that is essentially free of any stable isotopes of the same...
• No observed adverse effect levelThe highest dose or exposure level of a substance at which no statistically or biologically adverse effects...
• No-acceptable-daily-intake-allocatedA regulatory designation indicating that an acceptable daily intake (ADI) has not been established for a...
• NociceptionThe neural process of encoding and processing noxious stimuli, which are those that are actually or...
• NodalRelating to a node, which is a point of intersection or a localized region of specialized tissue. In...
• Nodal planeA plane within an atomic or molecular orbital where the probability of finding an electron is zero, meaning...
• NodeA fundamental unit within a network structure, such as a neural network, that processes information. Each...
• Node of RanvierA periodic gap in the myelin sheath along an axon, where the axonal membrane is exposed to the extracellular...
• NOD-like receptorA class of intracellular pattern recognition receptors that are part of the innate immune system. They detect...
• NoduleA small, solid, circumscribed, and palpable lesion that is larger than a papule. Nodules can form in the...
• No-effect doseThe highest dose of a substance administered to a group of organisms that does not produce any detectable...
• No-effect levelThe highest dose or concentration of a substance that does not produce any detectable adverse effect in a...
• NogginA secreted protein that functions as an antagonist to bone morphogenetic proteins (BMPs). By binding directly...
• NoiseRandom fluctuations in a measured signal that do not originate from the analyte or the phenomenon being...
• No-load indicationThe reading obtained from a measuring instrument when no sample is present or when the input signal is zero...
• Nominal indicationA qualitative statement or description of a property, rather than a quantitative measurement. This type of...
• Nominal linear flowThe average velocity of the mobile phase through an unpacked column or an empty tube, calculated by dividing...
• Nominal massThe integer mass of an ion or molecule, calculated by summing the integer masses of its most abundant...
• Nominal propertyA characteristic of an entity that can be classified into distinct categories or types, without any inherent...
• Nominal property valueA qualitative attribute or characteristic of a substance or system that is expressed as a name, symbol, or...
• Nominal property value coverage probabilityThe probability that the true nominal property value of an examinand falls within a specified nominal...
• Nominal property value coverage setA defined set of nominal property values that is expected to contain the true nominal property value of an...
• Nominal property value setThe complete collection of all possible nominal property values that a particular nominal property can take...
• Nominal reference materialA reference material characterized by one or more nominal properties, which are qualitative attributes rather...
• Nominal spectral resolutionA characteristic value indicating the ability of a spectrometer to distinguish between two closely spaced...
• Nominally labelled tracerA tracer compound in which the label is introduced at a specific, known position within the molecule. This...
• Nonadiabatic couplingThe interaction between different electronic states of a molecular entity that is neglected in the...
• Non-aqueous capillary electrophoresisA variation of capillary electrophoresis where the separation is performed in a background electrolyte...
• Nonaqueous dispersionA colloidal system in which polymer particles are dispersed in a continuous phase that is an organic liquid...
• Non-bioenvironmental transformationA chemical change of a substance that occurs in the environment without the direct involvement of biological...
• Nonbonded interactionsForces between atoms in a molecule or between molecules that are not connected by covalent bonds. These...
• Nonbonding molecular orbitalA molecular orbital whose energy is approximately the same as that of the atomic orbitals from which it is...
• Non-calorimetric thermophysical measurementsMeasurements of thermophysical properties that do not directly involve the measurement of heat or heat...
• Non-certified property valueA characteristic value of a material that has been determined but is not accompanied by a certificate of...
• Nonclassical carbocationA carbocation in which the positive charge is delocalized over more than three atoms through a three-center...
• Nonclassical structureA molecular structure that cannot be accurately described by traditional Lewis structures involving only...
• Noncompetitive antagonistA type of receptor antagonist that binds to a site on the receptor distinct from the agonist binding site, or...
• Noncompetitive binding assayAn analytical method used to quantify a substance by measuring its binding to a specific receptor or...
• Non-covalent interactionsAttractive or repulsive forces between molecules or within a single molecule that do not involve the sharing...
• Non-crossing ruleA principle stating that potential energy surfaces of the same symmetry cannot intersect. This rule applies...
• Non-crystalline electrodesIon-selective electrodes where the sensing membrane is composed of a non-crystalline material, such as a...
• Non-crystalline membraneA type of membrane material that lacks a regular, repeating atomic or molecular structure. These membranes...
• Nondepleting antibodyAn antibody that binds to a target cell without causing its destruction or removal from circulation. These...
• Non-destructive activation analysisA nuclear analytical technique where a sample is irradiated with neutrons or other particles to induce...
• NondisjunctionThe improper segregation of chromosomes or chromatids during cell division, leading to an unequal...
• Non-dispersive infrared spectroscopiesA group of spectroscopic techniques that measure the absorption of infrared radiation by a sample without...
• Non-drainingDescribing a polymer molecule in solution where the solvent within the coiled chain is effectively...
• Non-equilibrium reactionA chemical reaction that is not at a state of thermodynamic equilibrium, meaning the forward and reverse...
• Non-graphitic carbonA form of carbon material that lacks the well-ordered, three-dimensional crystalline structure characteristic...
• Non-graphitizable carbonA type of carbon material that does not readily transform into a graphitic structure even when heated to very...
• non-Hodgkin lymphomaA heterogeneous group of cancers originating from lymphocytes, which are a type of white blood cell. These...
• Non-ideal chromatographyA chromatographic separation process where the behavior of solutes deviates from the assumptions of ideal...
• Non-ideal, linear chromatographyA chromatographic process characterized by a linear distribution isotherm, meaning the partition coefficient...
• Non-ideal, non-linear chromatographyA chromatographic separation characterized by both non-ideal kinetic effects and non-linear adsorption...
• Nonionising radiationElectromagnetic radiation that does not possess sufficient energy to ionize atoms or molecules, meaning it...
• Non-isothermal crystallisationThe process of polymer crystallization that occurs under conditions where the temperature of the material is...
• Non-isotopic labellingThe attachment of a non-radioactive marker to a molecule to enable its detection or tracking in a chemical or...
• non-Kekulé moleculesOrganic molecules that cannot be adequately represented by classical Kekulé structures, which consist solely...
• non-Kekulé structureA representation of a molecule that cannot be depicted using only alternating single and double bonds, as in...
• Non-linear chromatographyA chromatographic separation where the distribution isotherm, which describes the equilibrium partitioning of...
• Non-linear distribution isothermA relationship describing the equilibrium partitioning of a solute between the stationary and mobile phases...
• Non-linear iterative partial least squaresAn algorithm used in chemometrics to compute principal components and perform partial least squares...
• Nonlinear mappingA chemometric technique used to project high-dimensional data into a lower-dimensional space while preserving...
• Non-linear optical effectThe change in the optical properties of a material when exposed to intense electromagnetic radiation, such as...
• Non-linear optical polymerA polymeric material that exhibits a non-linear response to an applied electromagnetic field, meaning its...
• Non-linear optical techniquesExperimental methods that exploit the non-linear response of materials to intense light, typically from...
• Non-linearity errorA systematic deviation of an instrument's response from a perfectly linear relationship between the measured...
• Non-metal-mediated atom-transfer radical polymerizationA type of atom-transfer radical polymerization where the reversible deactivation of growing polymer radicals...
• Non-obese diabetic mouseA specific inbred strain of laboratory mouse that spontaneously develops autoimmune diabetes mellitus type 1...
• Nonoccupational exposureExposure to a chemical, physical, or biological agent that occurs outside of a person's workplace or...
• Non-parallel-chain crystalA crystalline structure in polymers where the polymer chains are not aligned parallel to each other within...
• Non-polarized interphasesInterfacial regions where the electrical potential difference across the interface is not significantly...
• Non-porous membraneA type of membrane that separates components based on their solubility and diffusivity within the membrane...
• Non-radiative decayThe process by which an excited electronic state of a molecule loses energy without emitting a photon. This...
• Non-radiative quenchingA process where the excited state energy of a fluorophore is dissipated through pathways other than the...
• Non-reversing heat flowThe component of heat flow that is associated with kinetically hindered processes, such as glass transition...
• Non-saturating soluteA component in a solution that is present at a concentration below its solubility limit, meaning it can still...
• Nonselectively labelledDescribing an isotopically modified compound in which the positions of the labelling nuclide(s) are defined...
• Non-selfAny molecule or cell that is recognized by the immune system as foreign and distinct from the host's own...
• Non-specific adsorptionThe adsorption of molecules onto a surface primarily through weak, non-covalent interactions such as van der...
• Non-specific bindingThe undesirable attachment of an analyte or reagent to surfaces or components of a system that are not the...
• Non-specific emission or attenuationAny emission or reduction in the intensity of electromagnetic radiation that is not directly related to the...
• Nonstochastic health effectsHealth effects that increase in severity with increasing dose above a certain threshold, and for which a...
• Nontarget organismsAny organism that is not the intended recipient or target of a particular chemical or biological agent, such...
• Non-uniform corrosionCorrosion that proceeds at varying rates across the surface of a material, leading to localized attack rather...
• Non-uniform dispersionA state in which components within a mixture, such as polymer particles in a solvent or filler particles in a...
• Non-uniform polymerA polymer sample in which the molecules differ in constitution or in relative molecular mass. This variation...
• Non-uniform samplingA data acquisition strategy where measurements are not taken at equally spaced intervals in time or...
• Non-vertical energy transferA photochemical process of intermolecular energy transfer where the geometry of the donor and acceptor...
• No-observed-effect concentrationThe highest concentration of a substance in an environmental medium (e.g., water, soil) at which no...
• No-observed-effect-levelThe highest concentration or amount of a substance, found by experiment or observation, that causes no...
• Nor-A prefix in chemical nomenclature indicating the elimination of one or more carbon atoms, along with their...
• NoradrenalineA catecholamine that functions as both a hormone and a neurotransmitter in the body. It is synthesized from...
• No-response levelThe concentration or dose of a substance at which no measurable biological response or effect is observed in...
• NormalA state or condition defined by specific standard values for temperature and pressure, used as a reference...
• Normal coordinateA specific linear combination of internal coordinates that describes a vibrational mode in a molecule. These...
• Normal coordinate analysisA computational method used to determine the normal modes of vibration and their corresponding frequencies...
• Normal dispersion of the refractive indexThe phenomenon where the refractive index of a material decreases as the wavelength of light increases, or...
• Normal equivalent deviationA transformation of a probability or a proportion, such as a response rate, into a value on the standard...
• Normal incidenceThe orientation of propagating electromagnetic radiation that strikes a surface at a right angle. In this...
• Normal modeA collective, synchronous motion of atoms in a molecule where all atoms oscillate with the same frequency and...
• Normal plasma analytical zoneThe region within an inductively coupled plasma (ICP) where the sample is efficiently atomized, ionized, and...
• Normal pulse voltammetryA voltammetric technique where the potential is applied as a series of pulses of increasing amplitude from a...
• Normal regionThe range of free energy change for an electron transfer reaction where the rate of electron transfer...
• Normal stressThe component of stress that acts perpendicularly to a given surface, either as tension (pulling apart) or...
• Normal X-ray levelAn energy level of an atom from which an electron can be ejected by X-ray absorption, leading to the emission...
• Normalized image log slopeA metric used in photolithography to quantify the contrast of a photoresist material, representing the...
• Normalized tunnelling intensityThe tunnelling current measured in inelastic electron tunnelling spectroscopy (IETS), divided by the elastic...
• Normal-phase chromatographyA chromatographic separation mode that employs a polar stationary phase and a nonpolar mobile phase. Solutes...
• NormitA unitless value derived from the normal equivalent deviation, specifically calculated as the normal...
• Norrish Type I photoreactionA photochemical reaction of carbonyl compounds involving the homolytic cleavage of the bond adjacent to the...
• Norrish Type II photoreactionA photochemical reaction of carbonyl compounds containing a hydrogen atom on the gamma-carbon, involving...
• Norrish-Yang reactionAn intramolecular photochemical reaction of a carbonyl compound containing a hydrogen atom gamma to the...
• Northern blotA molecular biology technique used to detect specific RNA sequences in a sample. RNA is first separated by...
• Nose-poke testA behavioral assay used in neurotoxicology and pharmacology to assess an animal's exploratory behavior...
• NosocomialRelating to an infection or disease acquired in a hospital or other healthcare setting. These infections are...
• Not in my backyard principleA sociological phenomenon describing the opposition by residents to the establishment of new facilities or...
• NotochordA flexible, rod-like structure composed of mesodermal cells that forms along the dorsal side of the embryo in...
• Nozzle-skimmer dissociationThe fragmentation of ions that occurs in the region between the atmospheric pressure ionization source nozzle...
• Nozzle-skimmer voltageThe electric potential difference applied between the exit of an atmospheric pressure ionization source, such...
• N-regionA segment of DNA encoding the non-templated nucleotides (N-nucleotides) inserted at the junctions of...
• N-terminal analysisA biochemical method used to determine the amino acid sequence starting from the N-terminus (amino-terminus)...
• N-terminusThe end of a peptide or protein chain that terminates with an amino acid residue having a free amine group...
• Nth order phase transitionA classification of phase transitions based on the lowest derivative of the Gibbs free energy that exhibits a...
• Nth-generation product ionAn ion formed from the dissociation of an (n-1)th-generation product ion, where n is an integer greater than...
• Nth-generation product ion spectrumA mass spectrum that displays the product ions resulting from 'n' successive stages of fragmentation of a...
• Nth-order effectA statistical effect observed in an experiment where the response variable is influenced by the interaction...
• Nuclear captureA nuclear reaction in which an atomic nucleus absorbs an incident particle, such as a neutron, without the...
• Nuclear chemistryThe branch of chemistry concerned with the properties of atomic nuclei, radioactivity, and nuclear reactions...
• Nuclear decayThe spontaneous process by which an unstable atomic nucleus transforms into a more stable nucleus by emitting...
• Nuclear disintegrationThe process where an unstable atomic nucleus spontaneously breaks down, emitting particles or electromagnetic...
• Nuclear electric quadrupole momentA measure of the deviation of a nucleus from spherical symmetry, arising from the non-uniform distribution of...
• Nuclear factor kappa-light-chain-enhancer of activated B cellsA protein complex that controls DNA transcription, cytokine production, and cell survival. It is found in...
• Nuclear factor of activated T cellsA family of transcription factors that regulate the expression of cytokine genes and other genes involved in...
• Nuclear fissionThe process in which a heavy atomic nucleus splits into two or more smaller nuclei, along with a few neutrons...
• Nuclear fuelA material containing fissile nuclides that can be used to sustain a nuclear chain reaction in a reactor. The...
• Nuclear fusion reactionA nuclear process in which two or more light atomic nuclei combine to form a single, heavier nucleus...
• Nuclear graphiteA high-purity form of graphite specifically manufactured for use in nuclear reactors as a neutron moderator...
• Nuclear hormone receptorA class of proteins that bind to specific hormone molecules and regulate gene expression within the cell...
• Nuclear isomersNuclides that have the same atomic number and mass number but differ in their nuclear energy states and...
• Nuclear levelA discrete energy state that an atomic nucleus can occupy. These levels are analogous to the electronic...
• Nuclear magnetic resonance relaxometryA nuclear magnetic resonance (NMR) technique that measures the rates at which nuclear spins return to...
• Nuclear magnetic resonance spectroscopyA spectroscopic technique that exploits the magnetic properties of atomic nuclei to determine the physical...
• Nuclear magnetic resonance spectrumA plot of signal intensity versus frequency in nuclear magnetic resonance (NMR) spectroscopy, displaying...
• Nuclear magnetonThe natural unit for expressing the magnetic moment of a heavy particle, such as a proton or neutron, caused...
• Nuclear Overhauser effectA change in the intensity of a nuclear magnetic resonance (NMR) signal of one nucleus when the NMR signal of...
• Nuclear Overhauser effect difference spectroscopyA nuclear magnetic resonance (NMR) technique that highlights signals enhanced by the nuclear Overhauser...
• Nuclear Overhauser effect spectroscopyA two-dimensional nuclear magnetic resonance (NMR) experiment that detects through-space correlations between...
• Nuclear particleA subatomic particle that resides within the atomic nucleus, primarily protons and neutrons. These particles...
• Nuclear quadrupole momentA measure of the deviation of a nucleus's charge distribution from spherical symmetry, arising from the...
• Nuclear quadrupole resonance spectroscopyA spectroscopic technique that detects transitions between nuclear quadrupole energy levels in solid samples...
• Nuclear reaction cross sectionA measure of the probability that a specific nuclear reaction will occur when a projectile particle interacts...
• Nuclear reactorA device that initiates and controls a sustained nuclear chain reaction, typically for generating electricity...
• Nuclear receptorA type of intracellular receptor protein that, upon binding to a ligand, directly regulates gene expression...
• Nuclear spindleA cytoskeletal structure composed of microtubules that forms during cell division to segregate chromosomes...
• Nuclear stopping cross sectionA measure of the energy loss per unit path length of an energetic ion due to elastic collisions with the...
• Nuclear transformationA process in which an atomic nucleus changes its composition, resulting in the formation of a different...
• Nuclear transitionA change in the energy state of an atomic nucleus, often accompanied by the emission or absorption of...
• Nuclear type I receptorA class of intracellular receptors that primarily bind to steroid hormones, such as glucocorticoids...
• Nuclear type II receptorA class of intracellular receptors that bind to non-steroidal ligands, including thyroid hormones, retinoids...
• NuclearityThe number of central atoms, typically metal ions, held together within a single coordination entity or...
• Nuclease assayA biochemical method used to detect or quantify the activity of nucleases, which are enzymes that cleave...
• Nucleating agentA substance added to a system to promote the formation of new phases, such as crystals from a solution or gas...
• NucleationThe initial step in the formation of a new thermodynamic phase, such as a crystal, a bubble, or a droplet...
• Nucleation and growthA two-step process describing the formation of a new phase from a supersaturated or supercooled parent phase...
• Nucleation of phase separationThe initial stage of phase separation in a polymer blend or solution, where small, stable regions of a new...
• Nucleic acid aptamersShort, single-stranded DNA or RNA oligonucleotides that can fold into specific three-dimensional structures...
• Nucleic acidsBiopolymers composed of repeating nucleotide units, which are themselves made of a nitrogenous base, a...
• NucleobaseA nitrogen-containing heterocyclic compound that forms the fundamental building blocks of nucleic acids...
• Nucleobase lesionA chemical modification or damage to one of the nucleobases (adenine, guanine, cytosine, thymine, or uracil)...
• NucleofugeA leaving group that departs from a substrate with the electron pair that formed the bond. The ability of a...
• NucleonA constituent particle of an atomic nucleus, encompassing both protons and neutrons. These subatomic...
• Nucleon numberThe total count of protons and neutrons within an atomic nucleus, also known as the mass number. This integer...
• NucleophileA chemical species that donates an electron pair to an electrophile to form a chemical bond. Nucleophiles are...
• Nucleophilic aromatic photosubstitutionA photochemical reaction in which a nucleophile replaces a substituent on an aromatic ring, with the reaction...
• Nucleophilic catalysisA form of catalysis where a nucleophile, the catalyst, reacts with a substrate to form a reactive...
• Nucleophilic chain polymerizationA type of chain polymerization initiated by a nucleophile attacking an electrophilic monomer, leading to the...
• Nucleophilic substitutionA type of reaction in which an electron-rich nucleophile replaces a leaving group on an electron-deficient...
• NucleophilicityA measure of the ability of a nucleophile to donate an electron pair and form a new bond with an...
• NucleoproteinsConjugated proteins that are intimately associated with nucleic acids, forming stable complexes. These...
• NucleosidesOrganic molecules composed of a nitrogenous base (a purine or pyrimidine) covalently linked to a five-carbon...
• Nucleotide basesThe nitrogen-containing aromatic compounds that are the fundamental components of nucleotides, which in turn...
• Nucleotide sequenceThe specific order of nucleotides within a DNA or RNA molecule. This sequence carries the genetic information...
• Nucleotide-binding oligomerization domain-containing protein 1, 2A pair of intracellular pattern recognition receptors, NOD1 and NOD2, that detect specific peptidoglycan...
• Nucleotide-binding oligomerization domain-containing protein-like receptorA class of intracellular proteins that function as sensors for pathogen-associated molecular patterns and...
• NucleotidesThe fundamental building blocks of nucleic acids, consisting of a nitrogenous base, a five-carbon sugar...
• NucleusThe positively charged central core of an atom, composed of protons and neutrons, that contains nearly all of...
• NuclideAn atom characterized by the specific number of protons and neutrons in its nucleus, and by its nuclear...
• Nuclide precursorA radionuclide that decays to produce a specific nuclide of interest, which is referred to as the progeny or...
• Nuclidic massThe exact mass of a specific nuclide, expressed in atomic mass units (amu). This mass is primarily determined...
• Nude mouseA specific strain of laboratory mouse characterized by a genetic mutation that results in an absent or...
• Nuisance thresholdThe concentration of an air pollutant at which it begins to cause annoyance, discomfort, or adverse effects...
• Null cellA lymphocyte that lacks the characteristic surface markers of both B lymphocytes and T lymphocytes. These...
• NulligravidaA female who has never been pregnant. The term applies regardless of whether a past pregnancy, if one had...
• NulliparousDescribing a female who has never completed a pregnancy to the stage of fetal viability. This status is...
• Number concentrationThe number of specified entities of a constituent divided by the volume of the mixture. This quantity, also...
• Number contentThe number of specified elementary entities in a sample divided by the volume of the sample. This quantity...
• Number densityThe number of specified entities per unit volume, often used to describe the concentration of particles in a...
• Number flow rateThe number of specified elementary entities that pass through a given cross-sectional area per unit of time...
• Number of entitiesA dimensionless quantity representing the count of specified elementary particles, molecules, ions, or other...
• Number of generationsA characteristic parameter for dendrimers, representing the number of repetitive branching layers emanating...
• Number of pseudo-generationsA numerical value representing the number of successive branching points encountered when moving from the...
• Number-average molar massA statistical average of the molar masses of all individual polymer molecules in a sample, weighted by the...
• Number-average particle diameterA statistical measure of the average size of particles in a dispersed system, calculated by summing the...
• Number-distribution functionA mathematical function that describes the distribution of a specific variable, such as molar mass or...
• NumbnessA reduction or complete loss of sensation in a part of the body, often experienced as a tingling or 'pins and...
• Numerical apertureA dimensionless quantity that indicates the light-gathering ability of an optical system, such as a...
• Numerical responseA change in the population density of a predator species in response to a change in the density of its prey...
• Numerical valueA quantitative expression of a physical quantity, obtained through measurement or calculation, and typically...
• Nutritional table methodA dietary assessment technique that involves estimating nutrient intake by comparing consumed food items with...
• Nyquist criterionA principle in signal processing that states that to accurately reconstruct a continuous signal from its...
• Nyquist frequencyHalf of the sampling rate of a discrete signal processing system. It represents the maximum frequency that...
• NystagmusInvoluntary, repetitive, and rapid movements of the eyes, which can occur from side to side, up and down, or...

468 of 13,678 terms in Chemistry terminology (MLC-0109). Request the full dataset.