| 单词 | accelerator |
| 释义 | accelerator (once / 5683 pages) 1n 2n 3n An accelerator makes things go, or accelerate. The gas pedal on a car is an accelerator, but so is a machine that scientists use to speed particles up and smash them. An accelerator gets things going. In a car, the accelerator is the gas pedal that you mash with your foot when you’re ready to speed off into the sunset. In physics, a particle accelerator speeds off in a different way — it takes a particle, such as an electron, and speeds it up to almost the speed of light, and smashes it into an atom. Why? To see what it’s made of. WORD FAMILYaccelerator: accelerators+/accelerate: accelerated, accelerates, accelerating, acceleration, accelerative, accelerator, acceleratory/acceleration: accelerations/accelerative: acceleratively USAGE EXAMPLESDr. Goldwasser, who was long associated with the University of Illinois, helped pioneer the use of powerful particle accelerators in American physics. New York Times(Dec 28, 2016) For many years, Dr. Drell was a key figure at the Stanford Linear Accelerator Center, a laboratory operated by the Energy Department. Washington Post(Dec 24, 2016) Is your current work a big switch from programming a particle accelerator? New York Times(Dec 23, 2016) 1 1n a pedal that controls the throttle valve Syn|Hyper accelerator pedal, gas, gas pedal, gun, throttle foot lever, foot pedal, pedal, treadle a lever that is operated with the foot 2n a valve that regulates the supply of fuel to the engine 2Syn|Hyper throttle, throttle valve valve control consisting of a mechanical device for controlling the flow of a fluid n (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected 3Syn|Ant|Hypo|Hyper catalyst anticatalyst (chemistry) a substance that retards a chemical reaction or diminishes the activity of a catalyst biocatalyst a biochemical catalyst such as an enzyme enzymeany of several complex proteins that are produced by cells and act as catalysts in specific biochemical reactions platinum blacka fine black powder of platinum; used as a catalyst in chemical reactions ADA, adenosine deaminasean enzyme found in mammals that can catalyze the deamination of adenosine into inosine and ammonia amylaseany of a group of proteins found in saliva and pancreatic juice and parts of plants; help convert starch to sugar cholinesterasean enzyme that hydrolyses acetylcholine (into choline and acetic acid) coagulasean enzyme that induces coagulation collagenaseany enzyme that catalyzes the hydrolysis of collagen and gelatin complementone of a series of enzymes in the blood serum that are part of the immune response catalaseenzyme found in most plant and animal cells that functions as an oxidative catalyst; decomposes hydrogen peroxide into oxygen and water Cox, cyclooxygenaseeither of two related enzymes that control the production of prostaglandins and are blocked by aspirin decarboxylaseany of the enzymes that hydrolize the carboxyl group de-iodinasean enzyme that removes the iodine radical disaccharidasean enzyme that catalyzes the hydrolysis of disaccharides into monosaccharides elastasea pancreatic enzyme that catalyzes the hydrolysis of elastin enterokinaseenzyme in the intestinal juice that converts inactive trypsinogen into active trypsin histaminaseenzyme that acts as a catalyst in converting histidine to histamine Hyazyme, hyaluronidase, spreading factoran enzyme (trade name Hyazyme) that splits hyaluronic acid and so lowers its viscosity and increases the permeability of connective tissue and the absorption of fluids isomerasean enzyme that catalyzes its substrate to an isomeric form kinasean enzyme that catalyzes the conversion of a proenzyme to an active enzyme lipasean enzyme secreted in the digestive tract that catalyzes the breakdown of fats into individual fatty acids that can be absorbed into the bloodstream lysozyme, muramidasean enzyme found in saliva and sweat and tears that destroys the cell walls of certain bacteria MAO, monoamine oxidasean enzyme that catalyzes the oxidation of many body compounds (e.g., epinephrine and norepinephrine and serotonin) nitrogenasean enzyme of nitrogen-fixing microorganisms that catalyzes the conversion of nitrogen to ammonia nucleasegeneral term for enzymes that catalyze the hydrolysis of nucleic acid by cleaving chains of nucleotides into smaller units oxidaseany of the enzymes that catalyze biological oxidation oxidoreductasean enzyme that catalyzes oxidation-reduction papaina proteolytic enzyme obtained from the unripe papaya; used as a meat tenderizer beta-lactamase, penicillinaseenzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic pepsinan enzyme produced in the stomach that splits proteins into peptones pepsinogenprecursor of pepsin; stored in the stomach walls and converted to pepsin by hydrochloric acid in the stomach phosphataseany of a group of enzymes that act as a catalyst in the hydrolysis of organic phosphates fibrinolysin, plasminan enzyme that dissolves the fibrin of blood clots polymerasean enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA peptidase, protease, proteinase, proteolytic enzymeany enzyme that catalyzes the splitting of proteins into smaller peptide fractions and amino acids by a process known as proteolysis reductasean enzyme that catalyses the biochemical reduction of some specified substance chymosin, renninan enzyme that occurs in gastric juice; causes milk to coagulate secretasea set of enzymes believed to snip pieces off a longer protein producing fragments of amyloid protein that bunch up and create amyloid protein plaques in brain tissue (the pathological hallmark of Alzheimer's) streptodornasean enzyme produced by some hemolytic strains of streptococcus that dissolves fibrinous secretions from infections; used medicinally (often in combination with streptokinase) streptokinasean enzyme produced by some strains of streptococcus that can liquefy blood clots by converting plasminogen to plasmin; used medicinally in some cases of myocardial infarction and pulmonary embolism SOD, superoxide dismutasean enzyme that catalyzes the conversion of superoxide into hydrogen peroxide and oxygen telomerasean enzyme in eukaryotic cells that can add telomeres to the ends of chromosomes after they divide transferaseany of various enzymes that move a chemical group from one compound to another compound trypsinan enzyme of pancreatic origin; catalyzes the hydrolysis of proteins to smaller polypeptide units ureasean enzyme that catalyzes the hydrolysis of urea into carbon dioxide and ammonia; is present in intestinal bacteria zymasea complex of enzymes that cause glycolysis; originally found in yeast but also present in higher organisms activator (biology) any agency bringing about activation; a molecule that increases the activity of an enzyme or a protein that increases the production of a gene product in DNA transcription n a scientific instrument that increases the kinetic energy of charged particles Syn|Hypo|Hyper atom smasher, particle accelerator betatron, induction accelerator accelerates a continuous beam of electrons to high speeds by means of the electric field produced by changing magnetic flux charge-exchange acceleratoran accelerator in which high-energy ions escape from plasma following charge exchange Cockcroft and Walton accelerator, Cockcroft and Walton voltage multiplier, Cockcroft-Walton accelerator, Cockcroft-Walton voltage multipliera high-voltage machine in which rectifiers charge capacitors that discharge and drive charged particles through an accelerating tube collideran accelerator in which two beams of particles are forced to collide head on cyclotronan accelerator that imparts energies of several million electron-volts to rapidly moving particles linac, linear acceleratorions are accelerated along a linear path by voltage differences on electrodes along the path bevatrona cyclotron that accelerates protons up to several billion electron volts electron acceleratorcollider that consists of an accelerator that collides electrons and positrons microwave linear acceleratorlinear accelerator that uses microwaves proton acceleratora collider that collides beams of protons and antiprotons superconducting supercollidera collider that operates at very low temperatures synchrocyclotroncyclotron that achieves relativistic velocities by modulating the frequency of the accelerating electric field synchrotroncyclotron in which the electric field is maintained at a constant frequency scientific instrument an instrument used by scientists |
| 随便看 |
英语词典包含147318条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。