9,586 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Chemical Reactions"  
prev Results: 25 - 48 next
open access

The synthesis of methylenecyclobutane, spiropentane, and 2-methyl-1-butene from pentaerythrityl tetrabromide

Description: From Summary: "Reduction of pentaerythrityl tetrabromide in ethanol with zinc in the presence of sodium carbonate and sodium iodide was found to yield methylenecyclobutane, spiropentane, and 2-methyl-l-butene. Yields were 46 percent methylenecyclobutane, 21 percent spiropentane, and 12 percent 2-methyl-l-butene. The reduction procedure described offers a method of preparing both methylenecyclobutane and spiropentane from the same reaction in yields comparable with individual methods of synthesi… more
Date: February 1946
Creator: Slabey, Vernon A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

General method for computation of equilibrium composition and temperature of chemical reactions

Description: Report presenting an approximation process that can be used to determine both composition and temperature resulting from a chemical reaction. It is suitable for use with any set of reactants over the complete range of mixture ratios as long as the products of reaction are ideal gases.
Date: June 1950
Creator: Huff, Vearl N. & Morrell, Virginia E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preparation of N-Polychloropolyfluoroheptane

Description: From introduction: "Discussion of alternate processes for manufacture of perfluoroxylene as insurance against any eventuality, e.g. disaster, poor quality, required amount of elemental fluorine not obtainable, necessity for further expansion at some future date, or decreasing cost."
Date: 1946
Creator: Babcock, J. H.; Beanblossom, W. S. & Wojcik, B. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modeling the coupling between flow and transport developed by chemical reactions and density differences using TOUGHREACT.

Description: A complex pattern of coupling between fluid flow and mass transport develops when heterogeneous reactions occur. For instance, dissolution and precipitation reactions can change the physical properties of a medium, such as permeability and pore geometry. These changes influence fluid flow, which in turn impact the composition of dissolved constituents and solid-phase, and the rate and direction of advective transport. Two-dimensional modeling studies using TOUGHREACT were conducted to investiga… more
Date: April 1, 2003
Creator: Kim, Jeongkon; Scwartz, Franklin W.; Shi, Jianyou & Xu, Tianfu
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

2001 Gordon Research Conference on Organometallic Chemistry. Final progress report [agenda and attendee list]

Description: The Gordon Research Conference on Organometallic Chemistry was held at Salve Regina University, Newport, Rhode Island, July 22-27, 2001. The conference had 133 participants. The attendees represented the spectrum of endeavor in this field, coming from academia, industry, and government laboratories, and included US and foreign scientists, senior researchers, young investigators, and students. Emphasis was place on current unpublished research and discussion of the future target areas in this fi… more
Date: July 27, 2001
Creator: Burns, Carol
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Synthesis and reactions of poly(ethynyldialkylsilanes)

Description: A nucleophilic cleavage reaction of 2,2,5,5,8,8-hexamethyl-2,5,8-trisilanona-3,6-diyne, I, with several bases, occurs rapidly at room temperature in both polar and non-polar solvents. An attack occurs exclusively at the central silicon regardless of the steric requirements of the bases (alkyllithium). The major products from the reaction of I with tert-butyllithium followed by hydrolysis were 2,2,5,5,6,6-hexamethyl-2,5-disilahepta-3-yne, II, and 2,2,5,5-tetramethyl-2,5-disilahexa-3-yne, VI.
Date: December 1990
Creator: Jo, Kyo Dong
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Chemistry of Uranium. Collected Papers

Description: Originally intended for publication as NNES-VIII-7. Elghty-one papers are presented on thc chemistry of uranium. (W.L.H.) 13236(Abstract unscannable)
Date: January 1, 1958
Creator: Katz, J.J. & Rabinowitch, E. eds.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rate of reaction of gaseous fluorine with water vapor at 35 degrees C

Description: Report presenting testing of fluorine and water vapor, which react extremely slowly or not at all in the gas phase at 35 degrees Celsius at partial pressures of the reactants up to 40 mm of mercury. Results regarding the gross nature of the reaction, order of the reaction, kinetics of surface and gas-phase reactions, relative importance of surface and gas-phase reactions, and rate of surface reaction are provided.
Date: September 1958
Creator: Slabey, Vernon A. & Fletcher, Edward A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Photosynthesis

Description: Encyclopedia article entry in the Encyclopedia of Time: Science, Philosophy, Theology, and Culture by H. James Birx. This encyclopedia article discusses photosynthesis.
Date: 2009
Creator: O'Toole, Erin
Item Type: Refine your search to only Text
Partner: UNT Libraries
open access

Researches on Preliminary Chemical Reactions in Spark-Ignition Engines

Description: "Chemical reactions can demonstrably occur in a fuel-air mixture compressed in the working cylinder of an Otto-cycle (spark ignition) internal-combustion engine even before the charge is ignited by the flame proceeding from the sparking plug. These are the so-called "prelinminary reactions" ("pre-flame" combustion or oxidation), and an exact knowledge of their characteristic development is of great importance for a correct appreciation of the phenomena of engine-knock (detonation), and conseque… more
Date: June 1943
Creator: Mühlner, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Long-term risk from actinides in the environment: Modes of mobility. 1998 annual progress report

Description: 'The mobility of actinides in surface soils is a key issue of concern at several DOE facilities in arid and semiarid environments, including Rocky Flats, Hanford, Nevada Test Site, Idaho National Engineering Laboratory, and Los Alamos National Laboratory and the Waste Isolation Pilot Plant (WIPP). Key sources of uncertainty in assessing Pu mobility are the magnitudes of mobility resulting from three modes of transport: (1) wind erosion, (2) water erosion, and (3) vertical migration. Each of the… more
Date: June 1, 1998
Creator: Breshears, D. D.; Whicker, J. J.; Ibrahim, S. A.; Whicker, F. W. & Hakonson, T. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen