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         u antiquarks (U ANTIQUARKS)
         u centers (U-ZENTREN)
         u channel (U-INVARIANTE)
         u codes (U-CODES)
         u groups (U-GRUPPEN)
         u processes (U-PROZESSE)
         u quarks (U QUARKS)
         u values (K-WERTE)
         u-1 groups (U-1 GRUPPEN)
         u-12 groups (U-12 GRUPPEN)
         u-2 groups (U-2 GRUPPEN)
         u-3 groups (U-3 GRUPPEN)
         u-4 groups (U-4 GRUPPEN)
         u-5 groups (U-5 GRUPPEN)
         u-6 groups (U-6 GRUPPEN)
         u-gas process (U-GAS-VERFAHREN)
         u3o8 (U3O8)
         uar (VAR)
         ucla (UCLA)
         uclbl (UCLBL)
         udimet 500 (UDIMET 500)
         udimet 700 (UDIMET 700)
         udimet alloys (UDIMET-LEGIERUNGEN)
         udpg uridine diphosphoglucose
         uftr reactor (REAKTOR UFTR)



         ultracentrifuges (ULTRAZENTRIFUGEN)
         ultracold neutrons (ULTRAKALTE NEUTRONEN)
         ultrafiltration (ULTRAFILTRATION)
         ultrahigh frequency lower range
         ultrahigh frequency radiation lower range
         ultrahigh frequency upper range
         ultrahigh temperature (ULTRAHOCHTEMPERATUR)
         ultrahigh temperature reactor experiment (ULTRAHIGH TEMPERATURE REACTOR EXPERIMENT)
         ultrahigh vacuum (ULTRAHOCHVAKUUM)
         ultrahigh-speed photography (ULTRAHOCHGESCHWINDIGKEITSPHOTOGRAPHIE)
         ultralow frequency radiation (STRAHLUNG EXTREM NIEDRIGER FREQUENZ)
         ultralow temperature (ULTRATIEFTEMPERATUR)
         ultramarine (ULTRAMARIN)
         ultrasonic machining (ULTRASCHALLBEARBEITUNG)
         ultrasonic testing (ULTRASCHALLPRUEFUNG)
         ultrasonic waves (ULTRASCHALLWELLEN)
         ultrasonic welding (ULTRASCHALLSCHWEISSEN)
         ultrasonics (ULTRASCHALLAKUSTIK)
         ultrasonography (ULTRASCHALLAUFZEICHNUNG)
         ultrastructural changes (ULTRASTRUKTURVERAENDERUNGEN)
         ultraviolet divergences (ULTRAVIOLETTDIVERGENZEN)
         ultraviolet radiation (ULTRAVIOLETTSTRAHLUNG)
         ultraviolet spectra (ULTRAVIOLETTSPEKTREN)
         ultraviolet spectrometers (ULTRAVIOLETTSPEKTROMETER)
         ulva (ULVA)


         ulysse reactor (REAKTOR ULYSSE)
         umklapp processes (UMKLAPP-PROZESSE)
         umohoite (UMOHOIT)
         ump (UMP)
         umr reactor (UMR-REAKTOR)
         un scientific committee on effects of atomic radiation (AUSSCHUSS Z. UNTERSUCH.D. AUSWIRKUNGEN RADIOAKTIVER STRAHLEN)
         uncertainty in data values (UNGEWISSHEIT DER DATENWERTE)
         uncertainty principle (UNSCHAERFERELATION)
         unconsolidated rock
         uncorrelated-jet model (UNKORRELIERTES JET-MODELL)
         uncorrelated-particle model (MODELL UNKORRELIERTER TEILCHEN)
         underground (UNTERIRDISCH)
         underground buildings (UNTERIRDISCHE BAUTEN)
         underground disposal (UNTERIRDISCHE ABFALLAGERUNG)
         underground explosions (UNTERIRDISCHE EXPLOSIONEN)
         underground facilities (UNTERIRDISCHE ANLAGEN)
         underground gasification (UNTERTAGEVERGASUNG)
         underground heat distribution systems (UNTERIRDISCHE WAERMEVERTEILUNGSSYSTEME)
         underground mining (UNTERTAGEBAU)
         underground nuclear power plants (UNTERIRDISCHE KERNKRAFTWERKE)
         underground nuclear stations (UNTERIRDISCHE KERNENERGIEANLAGEN)
         underground power transmission (UNTERIRDISCHE LEISTUNGSUEBERTRAGUNG)
         underground space (UNTERIRDISCHER RAUM)
         underground storage (UNTERIRDISCHE LAGERUNG)
         underwater (UNTERWASSER)



         unitary pole approximation (UNITAERE POLNAEHERUNG)
         unitary symmetry (UNITAERE SYMMETRIE)
         united arab emirates (VEREINIGTE ARABISCHE EMIRATE)
         united arab republic (VEREINIGTE ARABISCHE REPUBLIK)
         united kingdom (VEREINIGTES KOENIGREICH)
         united kingdom organizations (BRITISCHE ORGANISATIONEN)
         united nations (VEREINTE NATIONEN)
         united nations development program (ENTWICKLUNGSPROGRAMM DER VEREINTEN NATIONEN)
         united nations framework convention on climate change
         united nations institute for disarmament research (INSTITUT DER VEREINTEN NATIONEN FÜR ABRUESTUNGSFORSCHUNG)
         united republic of tanzania (VEREINIGTE REPUBLIK TANSANIA)
         united states of america (VEREINIGTE STAATEN V. AMERIKA)
         united states uranium registry (UNITED STATES URANIUM REGISTRY)
         unithiol (UNITHIOL)
         uniton (UNITON)
         units (EINHEITEN)
         univac computers (UNIVAC-COMPUTER)
         universal blackbody radiation (UNIVERSELLE HOHLRAUMSTRAHLUNG)
         universe (UNIVERSUM)
         universities (UNIVERSITAETEN)
         university of california berkeley reactor (UNIVERSITY OF CALIFORNIA BERKELEY REACTOR)
         university of california irvine reactor (UNIVERSITY OF CALIFORNIA IRVINE REACTOR)
         university of california lawrence radiation laboratory (UNIVERSITY OF CALIFORNIA LAWRENCE RADIATION LABORATORY)
         university of california los angeles
         university of maryland reactor (UNIVERSITY OF MARYLAND REACTOR)



         upshot project (PROJEKT UPSHOT)
         upsilon resonances (YPSILON-RESONANZEN)
         uptake (AUFNAHME)
         upwelling (AUFSTEIGENDES WASSER)
         urach geothermal field (ERDWAERMEFELD URACH)
         uracils (URACILE)
         uragan stellarator (URAGAN-STELLARATOR)
         ural computers (URAL-COMPUTER)
         ural mountains (URALGEBIRGE)
         urals (URAL)
         uranates (URANATE)
         uranium (URAN)
         uranium 218 (URAN 218)
         uranium 220 (URAN 220)
         uranium 221 (URAN 221)
         uranium 222 (URAN 222)
         uranium 223 (URAN 223)
         uranium 224 (URAN 224)
         uranium 225 (URAN 225)
         uranium 226 (URAN 226)
         uranium 228 (URAN 228)
         uranium 229 (URAN 229)
         uranium 230 (URAN 230)
         uranium 231 (URAN 231)
         uranium 232 (URAN 232)






         urban populations (STADTBEVOELKERUNG)
         urea (HARNSTOFF)
         urea-formaldehyde foams (HARNSTOFF-FORMALDEHYD-SCHAEUME)
         urease (UREASE)
         uremia (URAEMIE)
         ureters (HARNLEITER)
         urethane (URETHAN)
         urethra (HARNROEHRE)
         uric acid (HARNSAEURE)
         uricase (URICASE)
         uridine (URIDIN)
         uridine diphosphoglucose (URIDINDIPHOSPHATGLUCOSE)
         uridine monophosphate (URIDINMONOPHOSPHAT)
         uridine triphosphate (URIDINTRIPHOSPHAT)
         uridylic acid (URIDYLSAEURE)
         urinalysis (URINUNTERSUCHUNG)
         urinary ketosteroids (HARNKETOSTEROIDE)
         urinary tract (HARNTRAKT)
         urine (URIN)
         urobilinogen (UROBILINOGEN)
         urocanic acid (UROCANSAEURE)
         urocyon (UROCYON (GRAUFUECHSE))
         urogenital system diseases (ERKRANKUNGEN DES UROGENITALSYSTEMS)
         urokinase (UROKINASE)
         uronic acids (URONSAEUREN)


         urotropin (UROTROPIN)
         urr reactor (REAKTOR URR)
         uruguay (URUGUAY)
         us aec (US AEC)
         us antitrust laws (US ANTITRUST LAWS)
         us atomic energy commission (US ATOMIC ENERGY COMMISSION)
         us bureau of mines (US BUREAU OF MINES)
         us bureau of reclamation (US BUREAU OF RECLAMATION)
         us cia (US CIA)
         us clean air act (US CLEAN AIR ACT)
         us clean coal technology program (US CLEAN COAL TECHNOLOGY PROGRAM)
         us clean water act (US CLEAN WATER ACT)
         us coast guard (US COAST GUARD)
         us corps of engineers (US CORPS OF ENGINEERS)
         us department of agriculture (US DEPARTMENT OF AGRICULTURE)
         us department of commerce (US DEPARTMENT OF COMMERCE)
         us department of defense (US DEPARTMENT OF DEFENSE)
         us department of health education and welfare
         us department of housing and urban development (US DEPARTMENT OF HOUSING AND URBAN DEVELOPMENT)
         us department of justice (US DEPARTMENT OF JUSTICE)
         us department of labor (US DEPARTMENT OF LABOR)
         us department of state (US DEPARTMENT OF STATE)
         us department of treasury (US DEPARTMENT OF TREASURY)
         us doa (US DOA)
         us doc (US DOC)


         us dod (US DOD)
         us doe (US DOE)
         us doe inspector general (US DOE INSPECTOR GENERAL)
         us doe program management (US DOE PROGRAM MANAGEMENT)
         us doi (US DOI)
         us doj (US DOJ)
         us dol (US DOL)
         us dos (US DOS)
         us dot (US DOT)
         us east coast (OSTKUESTE (USA))
         us ees (US EES)
         us energy extension service (US ENERGY EXTENSION SERVICE)
         us energy information administration (US ENERGY INFORMATION ADMINISTRATION)
         us energy policy and conservation act (US ENERGY POLICY AND CONSERVATION ACT)
         us epa (US EPA)
         us era (US ERA)
         us erda (US ERDA)
         us faa (US FAA)
         us fda (US FDA)
         us fea (US FEA)
         us federal power commission (US FEDERAL POWER COMMISSION)
         us fema (US FEMA)
         us ferc (US FERC)
         us forest service (US FOREST SERVICE)
         us fws (US FWS)




         uvea (UVEA)
         uvvvr (UVVVR)
         uzbekistan (USBEKISTAN)