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Deborah A. Zarin
Deborah A. Zarin is an American physician and clinical-trials transparency researcher who directed ClinicalTrials.gov from 2005 to 2018, building its first public database of trial results.
Deborah number
The Deborah number (De) is a dimensionless rheology number, defined by Markus Reiner in 1964 as a material's relaxation time divided by the time scale of deformation.
Deborah S. Jin
Deborah S. Jin (1968–2016) was an American physicist at JILA, a NIST and University of Colorado institute, who created the first fermionic condensate in 2003.
Deboronative functionalization
Deboronative functionalization is a set of synthetic transformations in which a carbon–boron bond in a stable organoboron compound is cleaved and replaced with a new bond, discarding boron as a traceless handle.
Debra Fischer
Debra Fischer is an American astronomer, formerly Eugene Higgins Professor at Yale University, who discovered 186 extrasolar planets by measuring Doppler shifts in stellar spectra and established the planet-metallicity correlation.
Debra Rolison
Debra Rolison is an American electrochemist at the US Naval Research Laboratory known for porous nanostructured electrodes and the zinc sponge anode for rechargeable batteries.
Debris disk
A debris disk is a tenuous, dust-dominated circumstellar disk around a star, continuously replenished by collisions among planetesimals left over from planet formation, analogous to the Kuiper Belt.
Debris flow
A debris flow, also called a mudslide, mudflow, or lahar, is a fast-moving landslide in which soil, rock, and water flow downslope as a slurry, often triggered by intense rainfall.
Debrisoquine
Debrisoquine, also written debrisoquin, is a guanidine-derived isoquinoline compound, formula C10H13N3, marketed by Roche as the antihypertensive Declinax and withdrawn in the 1990s; its polymorphic metabolism founded pharmacogenetics.
Debye length
The Debye length, or Debye–Hückel screening length, is the distance over which electric fields are screened out in a plasma, so it appears electrically neutral beyond it.
Debye model
The Debye model, or Debye approximation, is a model of lattice heat capacity in solids that treats crystal vibrations as sound waves; Peter Debye proposed it in 1912.
Debye relaxation
Debye relaxation is the dielectric response of ideal, noninteracting permanent dipoles to an alternating electric field, proposed by Peter Debye and described by the Debye equation with one relaxation time.
Debye sheath
The Debye sheath, also called the Langmuir sheath, is a thin charged layer that forms where a plasma touches a surface, a few Debye lengths thick.
Debye shielding
Debye shielding is the reduction of an electric field inside a plasma over a distance called the Debye length, named for Peter Debye and Erich Hückel.
Debye temperature
The Debye temperature, symbol ΘD, is a characteristic temperature of a crystalline solid, introduced by Peter Debye in 1912, above which heat capacity follows the classical Dulong-Petit value.
Debye–Hückel theory
Debye–Hückel theory, also known as the Debye–Hückel rule, is a 1923 model by Peter Debye and Erich Hückel calculating ion activity coefficients in dilute electrolyte solutions.
Debye–Waller factor
The Debye–Waller factor, historically called the temperature factor, reduces an atom's scattering intensity to account for thermal vibration or static disorder, increasingly at larger scattering angles.
Decaborane(14)
Decaborane(14) is a stable boron hydride, B10H14, a colorless, air-stable, malodorous crystalline solid first synthesized by Alfred Stock and later targeted by a 1950s US high-energy fuel program.
Decabromodiphenyl ether
Decabromodiphenyl ether, also known as DecaBDE, is a brominated flame retardant used in plastics, textiles, and electronics, phased out after being identified as persistent, bioaccumulative, and toxic.
Decade Volcanoes
The Decade Volcanoes are 16 volcanoes designated by IAVCEI in the 1990s, part of the UN's disaster-reduction decade, for research and public awareness to reduce volcanic risk.
Decagon
A decagon is a polygon with 10 sides and 10 vertices, from the Greek for ten corners; the regular decagon has equal sides and 144° interior angles.
Decagonal quasicrystal
A decagonal quasicrystal is an intermetallic solid whose atoms are quasiperiodic in two dimensions and periodically stacked along a tenfold axis, discovered in 1985 in Al-Mn alloys.
Decamethylcyclopentasiloxane
Decamethylcyclopentasiloxane, also known as cyclopentasiloxane or D5, is a cyclic organosilicon compound, an odorless, colorless liquid used in silicone polymers, personal care products, and dry-cleaning solvents.
Decan
A decan, in ancient Egyptian astronomy, is a star or star group that rose every ten days, so 36 decans marked the night hours and the year.
Decanal
Decanal, also known as caprinaldehyde, is a saturated ten-carbon fatty aldehyde used in flavorings and fragrances, with a characteristic citrus-like odor found in orange and grapefruit oils.
Decane
Decane is a straight-chain alkane with ten carbon atoms, formula C₁₀H₂₂, a colorless liquid boiling near 174 °C that is found in crude oil and used as a solvent and diesel surrogate.
Decanoic acid
Decanoic acid, also known as capric acid, is a saturated ten-carbon medium-chain fatty acid found naturally in coconut oil, palm kernel oil, and mammalian milk, and studied for antiseizure effects.
Decantation
Decantation, also known as decanting, is a laboratory separation technique that pours a liquid off a settled solid precipitate or the denser of two immiscible liquids.
Decarbonization
Decarbonization is the reduction of the carbon intensity of an economy, or CO2 emissions per unit of GDP or energy, through electrification, renewables, efficiency, and carbon removal aimed at net zero.
Decarbonylation
Decarbonylation is a chemical reaction in which a molecule loses a carbon monoxide unit, typically via transition-metal catalysis, converting carbonyl substrates into products one carbon smaller.