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  • 1
    Electronic Resource
    Electronic Resource
    Design for autonomous mission planning system (2003)
    Bingley : Emerald
    Aircraft engineering and aerospace technology 75 (2003), S. 365-371 
    Details
    ISSN: 0002-2667
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Because of indeterminateness of the environment and delay of the communication, deep space spacecraft is required to be autonomous. Planning technology is studied in order to realize the spacecraft autonomy. First, a multi-agent planning system (MAPS) based on temporal constraint satisfaction is proposed for concurrency and distribution of spacecraft system. Second, timeline concept is used to describe simultaneous activity, continue time, resource and temporal constraints. Third, for every planning agent in the MAPS, its layered architecture is designed and planning algorithm based on the temporal constraint satisfaction is given in detail. Finally, taking some key subsystems of deep space explorer as an example, the prototype system of MAPS is implemented. The results show that with the communication and cooperation of the planning agents, the MAPS is able to produce complete plan for explorer mission quickly under the complex constraints of time and resource.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/00022660310484284
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  • 2
    Electronic Resource
    Electronic Resource
    Phase diagrams of perhydrotriphenylene and aromatic compounds (1996)
    Springer
    Journal of thermal analysis and calorimetry 47 (1996), S. 273-280 
    Details
    ISSN: 1572-8943
    Keywords: perhydrotriphenylene ; phase diagrams ; trans-Stylbene inclusion compounds solvents
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Perhydrotriphenylene (PHTP) forms channel-like adducts with molecules of different size and molecular weight. In the crystal structure of the adduct the included long sequences of molecules are separated from each other by the channel walls. The optical properties of the included molecules differ from those of the bulk molecules. The phase diagram of mixtures of PHTP and trans stylbene and 4H-cyclopenta [2,1-b∶3,4-b′] dithiophene (CPDT) were determined by DSC experiments. Ideality in the liquid phase was observed only in the PHTP/CPDT system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01982706
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of termination and transfer on molecular weight distribution of polymers, 6Part 5: cf.8.. Chain transfer to monomer and spontaneous termination (1986)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 187 (1986), S. 2641-2648 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In the previous parts of this series, a mathematical procedure was developed for the derivation of molecular size distribution functions of polymers generated in several ionic polymerizations. This paper follows this mathematical procedure to treat theoretically the kinetics of cationic and anionic polymerizations with instantaneous initiation, chain transfer to monomer, and spontaneous termination. The expressions of molecular size distribution functions and other molecular parameters are derived rigorously. Moreover, the simultaneous influence of chain transfer to monomer and spontaneous termination on molecular size distribution is illustrated by means of several numerical examples.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1986.021871113
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  • 4
    Electronic Resource
    Electronic Resource
    Influence of termination and transfer on molecular weight distribution of polymers, 5Part 4: cf.2.. Chain transfer to monomer and impurity termination (1986)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 187 (1986), S. 2629-2640 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In this paper, the simultaneous effect of impurity termination and chain transfer to monomer on the molecular size distribution for the anionic polymerization with instantaneous initiation was studied theoretically in detail. The rigorous expressions for the molecular size distribution function and other molecular parameters were derived from a set of kinetic differential equations by means of the non-steady state method. In accordance with these expressions, several examples of numerical calculation are given and a comparison is made between the polymerization system with chain transfer to monomer and that without monomer transfer.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1986.021871112
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of polyfunctional chain transfer agents on molecular weight distribution in free-radical polymerization, 1. The ideal case: C equals one (1994)
    Weinheim : Wiley-Blackwell
    Macromolecular Theory and Simulations 3 (1994), S. 193-202 
    Details
    ISSN: 1022-1344
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The theoretical approach to free-radical polymerization in the presence of polyfunctional transfer agents can be derived in a simple way if the effects of primary chains and termination reactions are neglected. Under these conditions, and for values of the chain transfer constant C = 1, the analytical expressions for the number- and weight-average degree of polymerization, dispersion index and weight distribution function were derived through the elementary probability theory and generating functions. Numerical examples are reported on the relationship between distribution parameters, functionality and monomer conversion.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mats.1994.040030116
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  • 6
    Electronic Resource
    Electronic Resource
    Effect of polyfunctional chain transfer agents on molecular weight distribution in free-radical polymerization, 2Part 1: cf. ref.1. The case C ≤ 1 (1994)
    Weinheim : Wiley-Blackwell
    Macromolecular Theory and Simulations 3 (1994), S. 203-218 
    Details
    ISSN: 1022-1344
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: In this part of the series, the influence of polyfunctional chain transfer agents with transfer constant C ≤ 1 on the molecular weight distribution was studied. The analytical expressions for the number- and weight-average degree of polymerization, and dispersion index were derived by kinetic and statistical methods. The expression for the molecular weight distribution can only be obtained by statistical methods. Some numerical examples on the dependence of distribution parameters as a function of the functionality of transfer agents f and transfer constants are illustrated. A critical value of the chain transfer constant was found to exist, which permits the synthesis of linear (for f = 2) or branched polymers (f 〉 2) with DPw/DPn approximately equal to 2 during the entire course of the polymerization.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mats.1994.040030117
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  • 7
    Electronic Resource
    Electronic Resource
    Effect of polyfunctional chain transfer agents on the molecular weight distribution in free-radical polymerization, 3Part 2: cf. ref. 2 Polymerization of methyl methacrylate in the presence of polyfunctional chain transfer agentsDedicated to the memory of Mario Farina (1995)
    Weinheim : Wiley-Blackwell
    Macromolecular Chemistry and Physics 196 (1995), S. 2905-2913 
    Details
    ISSN: 1022-1352
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Polymerization of methyl methacrylate was carried out in the presence of polyfunctional chain transfer agents: 1,6-hexanedithiol, trimethylolpropaneb tris(mercaptoglycolate) and pentaerythritol tetrakis(3-mercaptopropionate). The theoretical results reported in the preceding papers are completely confirmed: the experimental values of the dispersion index (D = M̄w/M̄n) are 1.62 for f = 2, 1.39 for f = 3 and 1.28 for f = 4. In the case of bifunctional transfer agents the molecular weights calculated are in very good agreement with those obtained by size exclusion chromatography. The formation of star-shaped macromolecules was confirmed by cleavage of the C—S—C bonds. The number-average molecular weight decreases and the dispersion index is approximately equal to 2 after exposure to UV rays. The phenomenon of “pseudo-living” polymerization in the presence of polyfunctional chain transfer agents is also discussed.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1995.021960915
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  • 8
    Electronic Resource
    Electronic Resource
    Influence of termination and transfer on molecular weight distribution of polymers, 7Part 6: Cf.4.. Impurity transfer (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 333-339 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A mathematical procedure is developed to deal with the kinetics of ionic polymerization with impurity transfer and instantaneous initiation. Besides the technique of variable transformation, the integration of an implicit function is applied. The expressions of the molecular size distribution function and other molecular parameters are derived regorously, and several examples for numerical computations are given.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880210
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of termination and transfer on molecular weight distribution of polymers, 8Part 7: Cf.:2.. Spontaneous transfer (1987)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 188 (1987), S. 341-348 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The kinetics of cationic polymerization with instantaneous initiations and spontaneous transfer is treated theoretically. By means of a non-steady state analysis, rigorous expressions for the molecular weight distribution and other molecular parameters are derived from the set of differential equations without introducing any approximations. The influence of spontaneous transfer on the molecular weight distribution is discussed in detail based on several numerical examples.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1987.021880211
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  • 10
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    IJERPH, Vol. 12, Pages 15673-15682: Investigation of the Effects of Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) on Apoptosis and Cell Cycle in a Zebrafish (Danio rerio) Liver Cell Line (2015)
    MDPI Publishing
    Details
    Publication Date: 2015-12-10
    Description: This study aimed to explore the effects of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) on apoptosis and cell cycle in a zebrafish (Danio rerio) liver cell line (ZFL). Treatment groups included a control group, PFOA-IC50, PFOA-IC80, PFOS-IC50 and PFOS-IC80 groups. IC50 and IC80 concentrations were identified by cellular modeling and MTT assays. mRNA levels of p53, Bcl-2, Bax, Caspase-3 and NF-κB p65 were detected by qPCR. Cell apoptosis and cell cycle were detected by flow cytometry and the protein levels of p53, Bcl-2, Bax, Caspase-3 and NF-κB p65 were determined by western blotting. Both PFOA and PFOS inhibited the growth of zebrafish liver cells, and the inhibition rate of PFOS was higher than that of PFOA. Bcl-2 expression levels in the four groups were significantly higher than the control group and Bcl-2 increased significantly in the PFOA-IC80 group. However, the expression levels of Bax in the four treatment groups were higher than the control group. The percentage of cell apoptosis increased significantly with the treatment of PFOA and PFOS (p 〈 0.05). Cell cycle and cell proliferation were blocked in both the PFOA-IC80 and PFOS-IC80 groups, indicating that PFOA-IC80 and PFOS-IC50 enhanced apoptosis in ZFL cells.
    Print ISSN: 1661-7827
    Electronic ISSN: 1660-4601
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by MDPI Publishing
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