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The Young U.S. Navy Battled North African Pirates

The Barbary pirates , who had been marauding off the coast of Africa for centuries, encountered a new enemy in the early 19th century: the young United States Navy. The North African pirates had been a menace for so long that by the late 1700s most nations paid tribute to ensure that merchant shipping could proceed without being violently attacked.
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Types and Styles of Columns, Posts, and Pillars

The columns that hold up your porch roof may look simple, but their history is long and complicated. Some columns trace their roots to the Classical Orders of architecture, a type of "building code" from ancient Greece and Rome. Others find inspiration in Moorish or Asian building traditions. Others have been modernized from round to square.
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Info

Amy Lowell

Known for: promoted Imagist school of poetry Occupation: poet, critic, biographer, socialist Dates: February 9, 1874 - May 12, 1925 Amy Lowell Biography Amy Lowell didn't become a poet until she was years into her adulthood; then, when she died early, her poetry (and life) were nearly forgotten -- until gender studies as a discipline began to look at women like Lowell as illustrative of an earlier lesbian culture.
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The Dobzhansky-Muller Model

The Dobzhansky-Muller Model is a scientific explanation of why natural selection influences speciation in such a way that when hybridization occurs between species, the resulting offspring is genetically incompatible with other members of its species of origin. This occurs because there are several ways that speciation occurs in the natural world, one of which is that a common ancestor can break off into many lineages due to reproductive isolations of certain populations or parts of populations of that species.
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Life

Chemistry Abbreviations Starting with H and I

Chemistry abbreviations and acronyms are common in all fields of science. This collection offers common abbreviations and acronyms beginning with the letters H and I used in chemistry and chemical engineering. Chemistry Abbreviations Starting with H H - Enthalpy H - Hydrogen h - Planck's constant h - Convection heat transfer coefficient Ha - Hahnium (initial name for dubnium) HA - Hemagglutinin HAA - Haloacetic Acid HAc - Acetic Acid HAc - Acetaldehyde HACCP - Hazard Analysis and Critical Control Points HAP - Hazardous Air Pollutant HAS - Helium Atom Scattering HAS - HyAluronan Synthase HAT - Hypoxanthine, Aminopterin, Thymidine HAZMAT - HAZardous MATerials Hb - Hemoglobin HB - Hydrogen Bonded HBC - Hemoglobin C HBCD - HexaBromoCycloDodecane HBD - Hydrogen Bond Donor HC - HydroCarbon HCA - Hydroxycitric Acid HCA - HydroxyCarbonate Apatite HCB - HexaChloroBenzene HCFC - HydroChloroFluoroCarbon HDA - High-Density Amorphous ice HDA - HydroxyDecanoic Acid HDI - Hexamethylene DiIsocyanate HE - Hektoen Enteric Agar He - Helium HE - High Explosive HEA - Hektoen Enteric Agar HEK - HEKtoen enteric agar HEL - High Energy Laser HEMA - HydroxyEthylMethAcrylate HEP - Half Equivalence Point HEPA - High-Efficiency Particulate Air HEPH - Heavy Extractable Petroleum Hydrocarbons HEU - Highly Enriched Uranium Hf - Halfnium HF - Hartree-Fock Method HF - Heat Flux HF - High Frequency HF - Hydrogen Fuel HFA - HydroFluoroAlkane HFB - HexaFluoroBenzene HFC - HydroFluoroCarbon HFLL - Half-Filled Landau Level HFP - HexaFluoroPropylene Hg - Mercury Hgb - Hemoglobin HHV - High Heating Value HIC - Household And Industrial Chemical HL - Half-Life HL - Hydrogen Line HLA - HyaLuronic Acid HLB - Helium Light Band HMF - HydroxyMethyl Furfural HMW - High Molecular Weight Ho - Holmium HO - Hydroxyl radical HOAc - Acetic Acid HOMO - Highest Occupied Molecular Orbital HOQS - Highest Occupied Quantum State HP - High Pressure hp - horsepower HPHT - High-Pressure/High Temperature HPLC - High-Pressure Liquid Chromatography HPPT - High-Pressure Phase Transformation HPSV - High-Pressure Sodium Vapor Hr - Hour HRA - Health Risk Assessment Hs - Hassium HS - Hidden States HSAB - Hard and Soft Acids and Bases HSV - High Shear Viscosity HT - Heat Transport HT - Heat Treated HT - High Temperature HTC - Heat Transfer Coefficient HTGR - High-Temperature Gas Reactor HTH - High Test Hypochlorite HTS - High-Temperature Superconductor HTST - Hight Temperature/Short Time HV - High Viscosity HV - High Voltage HVLP - High Volume/Low Pressure HY - High Yield Hz - Hertz HZT - HydroChloroThiazide Chemistry Abbreviations Starting with I I - electrical current I - Iodine I - Isoleucine IAEA - International Atomic Energy Agency IAQ - Indoor Air Quality IB - Ion Balance IC - Ice Crystals ICE - Initial, Change, Equilibrium ICE - Internal Combustion Engine ICP - Inductively Coupled Plasma ICSC - International Chemical Safety Card ICSD - Inorganic Crystal Structure Database ICSN - Institut de Chimie des Substances Naturelles IE - Inert Electrolyte IE - Ionization Energy IEA - International Energy Agency IG - Inert Gas iHOP - information Hyperlinked Over Proteins i.
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Phase Diagram Definition

Phase Diagram Definition A phase diagram is a chart showing the thermodynamic conditions of a substance at different pressures and temperatures. The regions around the lines show the phase of the substance and the lines show where the phases are in equilibrium. Parts of a Phase Diagram Typically, a phase diagram includes lines of equilibrium or phase boundaries.
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