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  • 1
    Electronic Resource
    Electronic Resource
    Bimolecular reactions of ·CH2CH2OCH2+: A comparison with the chemical properties of CH3CH2OCH2+ and ionized trimethylene oxide (1992)
    New York, NY : Wiley-Blackwell
    Rapid Communications in Mass Spectrometry 6 (1992), S. 734-740 
    Details
    ISSN: 0951-4198
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: The chemical properties of the distonic radical cation ·CH2CH2OCH2+ are compared with those of its conventional isomer, ionized trimethylene oxide, and its even-electron analog, the ethoxymethyl cation (CH3CH2OCH2+). The rate constants and branching rations have been determined for the gas-phase reactions of the three ions with several neutral reagents in a dual-cell Fourier-transform ion cyclotron resonance device. The reactivity of each ion is found to be quite distinct. Fast electron transfer dominates most of the bimolecular reactions of ionized trimethyleene oxide. The ethoxymethyl cation reacts slowly or not at all with the reagents studied, and the only reaction observed is ethyl cation transfer. The distonic ion ·CH2CH2OCH2+ undergoes vedry fast reactions with all the neutral reagents, and, in sharp contrast to the other two ions, shows remarkably versatile reactivity. This ion rapidly transfers ionized ethylene to most of the neutral molecules studied. Facile electron transfer occurs with some of the neutral reagents while others abstract a pproton from the ion. Abstraction of a radical by the distonic ion-a reaction reported earlier for dimethyl disulfide - is not observed for any other reagent.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/rcm.1290061205
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  • 2
    Electronic Resource
    Electronic Resource
    Venting of runaway reactions with gas generation (1992)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 38 (1992), S. 723-732 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Pressure relief venting of a runway reaction with gas generation is examined in terms of the overall system response and the associated venting requirement. This article presents an exact formulation as well as an approximate analytical approach. The latter is shown to be particularly useful in vent-sizing applications. Using an aqueous hydrogen peroxide decomposition example, the analytical results are demonstrated to agree well with the exact numerical results over a wide range of overpressure. In addition, the analytical result is shown to reduce to the correct limit for a pure vapor system and offers a useful vent-sizing equation for a pure-gassy system.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690380509
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  • 3
    Electronic Resource
    Electronic Resource
    meso-(Tetraphenylporphinato)manganese(III)-tetracyanoethenide, [MnIIITPP]::⊕[TCNE].⊖. A New Structure-Type Linear-Chain Magnet with a Tc of 18KWe gratefully acknowledge support from the U.S. Department of Energy Division of Materials Science Grant No. DE- FG02-86ER45271.A000. We appreciate the synthetic assistance supplied by C. Vazquez, SQUID magnetic susceptibility by D. M. Groski, and R. B. Flippen, insightful discussions with G. T. Yee and P. Zhou, as well as the X-ray diffraction assistance by W. Marshall.Dedicated to Fred Basolo (1992)
    Weinheim : Wiley-Blackwell
    Advanced Materials 4 (1992), S. 498-501 
    Details
    ISSN: 0935-9648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/adma.19920040710
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  • 4
    Electronic Resource
    Electronic Resource
    Keratinocytes stimulate prostaglandin I2 synthesis by 3T3 cells and exhibit enhanced cornification when exposed to prostaglandin I2 analogues (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 150 (1992), S. 269-275 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The predominant cyclooxygenase products of keratinocytes are prostaglandin (PG)E2 and PGF2α with only trace amounts of PGI2 synthesis detected. When normal or immortal (NM1) keratinocytes were co-cultured with mitomycin C-treated 3T3 cells, increased synthesis of PGI2 was noted compared to mitomycin C-treated 3T3 cells alone. The PGI2 level in co-cultures was maximum within the first week and diminished rapidly thereafter. These results suggested keratinocytes enhance the production of PGI2 by 3T3 cells. Keratinocyte cultures incubated with lloprost and Piriprost, stable PGI2 analogues, showed evidence of increased cornification as demonstrated by staining with rhodanile blue, decreased shedding of cells into the culture medium, and more cornified material adhering to the culture surface. The cultures appeared to be responsive between the first and second weeks after plating and the inhibition of shedding could not be reversed by changing to drug-free medium. Control and treated cultures showed identical electrophoretic protein patterns. Immunoblots showed involucrin unchanged in extracts of control and treated cultures while the 22 kd pancornulin was absent in treated cultures. The findings that keratinocytes enhance the production of PGI2 by 3T3 cells and that PGI2 analogues enhance cornification of confluent keratinocytes raise the possibility that eicosanoids may serve as autoregulatory signals together with other factors.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041500208
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  • 5
    Electronic Resource
    Electronic Resource
    Measuring process safety management (1992)
    New York, NY : Wiley-Blackwell
    Plant/Operations Progress 11 (1992), S. 89-98 
    Details
    ISSN: 0278-4513
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Many companies are developing and implementing Process Safety Management (PSM) systems. Various PSM models, including those by the Center for Chemical Process Safety (CCPS), the American Petroleum Institute (API), the Chemical Manufacturers Association (CMA) and OSHA have emerged to guide the design, development and installation of these systems. These models represent distillations of the practices, methods and procedures successfully used by those who believed that a strong correlation exists between sound PSM practices and achieving reductions in the frequency and severity of process incidents.This paper describes the progress of CCPS research toward developing a PSM performance measurement model. It also provides a vision for future CCPS research to define effectiveness indices.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prsb.720110213
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