Alphabetical Listing of Chemistry Acronyms
- UDF — Unrestricted Dirac-Fock
- UDI — Utility Data Institute (power Generation)
- UDMH — Unsymmetrical Dimethyl Hydrazine (Alar Metabolite)
- UDP — Uridine 5′-diphosphate
- UDRI — University of Dayton Research Institute
- UDWA — Unitarized Distorted-wave Approximation
- UDWBA — Unitarized Disorted Wave Born Approxn. (for Scattering)
- UEATC — European Union For Technical Agreements In Construction (French; L’Union Europeenne Pour L’Agrement Technique Dans La Construc
- UEBS — Unitarized Eikonal Born Series (in Electron-atom Scattering)
- UEGO — Universal Exhaust Gas Oxygen Sensor
- UEL — Upper Explosive Limit
- UERPIC — Underground Excavation And Rock Properties Information Center
- UF — Ultrafiltration (water Treatment)
- UF — Uncertainty Factor (in Oral RfD)
- UFC — Uniform Fire Code
- UFF — Universal Force Field
- UFFI — Urea-formaldehyde Foam Insulation
- UFG — Ultrafine Grained
- UFL — Upper Flammable Limit
- UFM — Ultrasonic Force Microscopy
- UFP — Ultrafine Particles
- UGF — Unitary-group Formulation (in Many-body Quantum Theory)
- UGLCC — Upper Great Lakes Connecting Channels
- UHC — Unburned Hydrocarbons
- UHE — Ultra-high Energy
- UHF — Ultra-high Frequency
- UHF — Unrestricted Hartree-Fock
- UHF-AA — Unrestricted Hartree-Fock (with Spin) Annihilation
- UHF-CO — Unrestricted Hartree-Fock Crystal Orbital
- UHFQ — Unrestricted Hartree-Fock With Quartet Annihilation
- UHFS — Unrestricted Hartree-Fock-slater
- UHIPI — Ultrahigh Intensity Post-ionization
- UHMPE — Ultra High Modulus Polyethylene
- UHMWPE — Ultra High Molecular Weight Polyethylene
- UHP — Ultra High Purity
- UHPLC — Ultrahigh-pressure Liquid Chromatography
- UHT — Ultra High Temperature
- UHTS — Ultra High-throughput Screening
- UHV — Ultra High Vacuum
- UHVEM — Ultra High Voltage Electron Microscopy
- UIC — Underground Injection Control
- UIHRS — Upflow Inclined High-rate Settlers
- UJT — Unijunction Transistor
- UKAEA — United Kingdom Atomic Energy Authority
- UKAS — United Kingdom Accreditation Service
- UKAWRG — United Kingdom Acid Waters Review Group
- UKB — Unrestricted Kinetic Balance (in Calcns. of Wave Functions And Energies)
- UKIRT — United Kingdom Infrared Telescope
- UKMO — United Kingdom Meteorological Office
- ULDPE — Ultra Low Density Polyethylene
- ULEV — Ultra Low Emission Vehicle
- ULF — Ultra Low Frequency
- ULFM — Unified Ligand Field Model (for Mol. Electronic Energies)
- ULIRG — Ultraluminous Infrared Galaxy
- ULPA — Ultra Low Penetration Air
- ULSI — Ultra-large-scale Integration
- ULTRA — Underground Leak Transport Assessment Model
- UMDE — Ultramicrodisk Electrode
- UMEA — Ultramicroelectrode Array
- UMER — Ultrasonically Modulated Electron Resonance
- UMINDO — Spin-unrestricted Modified Intermediate Neglect of Differential Overlap
- UMIX — User-Manufacturer Information EXchange
- UMLS — Unified Medical Language System
- UMNDO — Spin-unrestricted Modified Neglect of Diatomic Overlap
- UMO — Unmodified Molecular Orbital
- UMP — Unrestricted Moeller-Plesset
- UMP — Uridine 5′-phosphate
- UMP2 — Unrestricted Moeller-Plesset 2nd-order (perturbation Theory)
- UMP4SDTQ — Unrestricted Moeller-Plesset 4th-order (perturbation Theory With) Single
- UMTRCA — Uranium Mill Tailings Radiation Control Act
- UNAMAP — Users’ Network For Applied Modeling of Air Pollution
- UNCED — United Nations Conference On Environment And Development
- UNDS — Uniform National Discharge Standards
- UNECE — United Nations Economic Commission For Europe
- UNEP — United Nations Environmental Program
- UNESCO — United Nations Educational
- UNFCCC — United Nations Framework Convention On Climate Change
- UNIDO — United Nations Industrial Development Organization
- UNIFAC — Universal Quasichem. Functional Group Activity Coeffs.
- UNIRAM — Software For Reliability
- UNITAR — United Nations Institute For Training And Research
- UNO — Unrestricted Natural Orbital
- UNO-CAS — Unrestricted Natural Orbital-complete Active Space
- UNOS — United Network For Organ Sharing
- UNS — Unified Numbering System For Metals And Alloys
- UNSCEAR — United Nations Scientific Committee On The Effects of Atomic Radiation
- UOFMN — Unified Organically Functionalized Mesoporous Network
- UOP — Universal Oil Products
- UOT — Universal Oxidn. Test
- UOVMO — Unoccupied Valence-type Mol. Orbital
- UPA — Unitary-pole Approximation
- UPD — Underpotential Deposition
- UPES — Ultraviolet Photoelectron Spectroscopy
- UPF — UV Protection Factor
- UPOT — Union Pacific Oxidation Test
- UPS — UV Photoelectron Spectroscopy
- UPS — Uninterrupted Power Systems (for Computer Networks)
- UPTF — Upper Plenum Test Facility
- UPVC — Unplasticized Poly(vinyl Chloride)
- UPW — Ultrapure Water
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