The decomposition mechanism of ammonium sulfate catalyzed by ferric oxide was investigated in this paper. The decomposition kinetics parameters were determined via a global optimization of the Kissinger iterative meth...The decomposition mechanism of ammonium sulfate catalyzed by ferric oxide was investigated in this paper. The decomposition kinetics parameters were determined via a global optimization of the Kissinger iterative method using the non-isothermal thermogravi- metric analysis data. The products and intermediates were synchronously characterized by X-ray diffraction and mass spectrometry. The obtained results indicate that the decomposition process of ammonium sulfate catalyzed by ferric oxide can be divided into four stages of which the activation energies are 123.64, 126.58, 178.77 and 216.99 kJ. mol^-1 respectively. The decomposition mechanisms at the first and the fourth stage both belong to Mample power theorem, the second stage belongs to Avrami-Erofeev equation and the third belongs to contracting sphere （volume） equation. The corresponding pre-exponential factors （A） are calculated simultaneously.展开更多
Iron Maiden is one of the leading bands of the New Wave of British Heavy Metal （NWoBHM）. The song lyrics of the first three albums deal, among other things, with the usual topics the youth of the time were concerned...Iron Maiden is one of the leading bands of the New Wave of British Heavy Metal （NWoBHM）. The song lyrics of the first three albums deal, among other things, with the usual topics the youth of the time were concerned with （love, rebellion and resistance against the establishment）, although they were viewed from a different angle： instead of love the lyrics talk about prostitution （Charlotte the Harlot）, sexual harassment （Prowler）, and juvenile criminality （Running Free）. This paper aims, on the one hand to show an overview of the topics of the song lyrics from the earlier Iron Maiden albums, and on the other hand to examine the concrete consequences the lyrics had on the music of the band （text interpretation）. During the 1980s, Iron Maiden began to diverge both musically （in the direction of experimental heavy metal） and thematically （among others, science fiction and war） from the NWoBHM. A further aim of this paper is to examine how much these new themes in the narrative influenced the music of Iron Maiden.展开更多
In the water-in-oil mieroemulsion system of Triton X-100, 1-hexanol, cyclohexane and Fe（NO3）3 aqueous solution, α－Fe2O3 ultrafine particles were prepared by the method of precipitation using NH3. From transndssion...In the water-in-oil mieroemulsion system of Triton X-100, 1-hexanol, cyclohexane and Fe（NO3）3 aqueous solution, α－Fe2O3 ultrafine particles were prepared by the method of precipitation using NH3. From transndssion electron ndcrographs the mean dianreter of particles is about 3nm. The trifornlity of particle is good. These result have been confirmed by the method of Mossbauer spectrum measurement. The conditions of preparation of α－Fe2O3 ultrallne particles could be controlled easily and the reaction medium could be used cyclically.展开更多
A palladium(Ⅱ) complex, PdLCl2·PdCl4, L=4-bromo-2,6-bis(N,N-diethylaminomethylene)pyridine, was synthesized and its crystal structure was determined by X-ray analysis. The complex crystallizes in monoclinic syst...A palladium(Ⅱ) complex, PdLCl2·PdCl4, L=4-bromo-2,6-bis(N,N-diethylaminomethylene)pyridine, was synthesized and its crystal structure was determined by X-ray analysis. The complex crystallizes in monoclinic system with space group Cc, a=0.845 1(17) nm, b=1.836 5(4) nm, c=2.715 8(5) nm, β=93.99(3)°, V=4.204 8(15) nm3, Z=4, R1=0.037 7 and wR2=0.076 9. The coordination geometry of the Pd atom in the cation is a slightly distorted square planar, with one pyridyl N and two N atoms of the diethylamine ligand, together with one Cl atom. The dihedral angle between the square planar (N3PdCl) and the pyridyl ring is 10.3(4)°. CCDC: 623421.展开更多
A dipyrazol-bridged macrocyclic palladium(II) complex [{Pd(en)}4L4](NO3)8 (en=ethylenediamine, L=3,3′,5,5′-tetramethyldipyrazol) 1 was prepared in water through a macrocyclization of cis-(ethylenediamine)Pd(II) nitr...A dipyrazol-bridged macrocyclic palladium(II) complex [{Pd(en)}4L4](NO3)8 (en=ethylenediamine, L=3,3′,5,5′-tetramethyldipyrazol) 1 was prepared in water through a macrocyclization of cis-(ethylenediamine)Pd(II) nitrate and the neutral form of the dipyrazol ligand 3,3′,5,5′-tetramethyldipyrazol. This cationic palladium macrocycle is highly distorted rather than a planar macrocycle and can hold eight nitrate anions around the macrocyclic framework through both hydrogen bonding and electrostatic interactions. CCDC: 192017.展开更多
文摘The decomposition mechanism of ammonium sulfate catalyzed by ferric oxide was investigated in this paper. The decomposition kinetics parameters were determined via a global optimization of the Kissinger iterative method using the non-isothermal thermogravi- metric analysis data. The products and intermediates were synchronously characterized by X-ray diffraction and mass spectrometry. The obtained results indicate that the decomposition process of ammonium sulfate catalyzed by ferric oxide can be divided into four stages of which the activation energies are 123.64, 126.58, 178.77 and 216.99 kJ. mol^-1 respectively. The decomposition mechanisms at the first and the fourth stage both belong to Mample power theorem, the second stage belongs to Avrami-Erofeev equation and the third belongs to contracting sphere （volume） equation. The corresponding pre-exponential factors （A） are calculated simultaneously.
文摘Iron Maiden is one of the leading bands of the New Wave of British Heavy Metal （NWoBHM）. The song lyrics of the first three albums deal, among other things, with the usual topics the youth of the time were concerned with （love, rebellion and resistance against the establishment）, although they were viewed from a different angle： instead of love the lyrics talk about prostitution （Charlotte the Harlot）, sexual harassment （Prowler）, and juvenile criminality （Running Free）. This paper aims, on the one hand to show an overview of the topics of the song lyrics from the earlier Iron Maiden albums, and on the other hand to examine the concrete consequences the lyrics had on the music of the band （text interpretation）. During the 1980s, Iron Maiden began to diverge both musically （in the direction of experimental heavy metal） and thematically （among others, science fiction and war） from the NWoBHM. A further aim of this paper is to examine how much these new themes in the narrative influenced the music of Iron Maiden.
文摘In the water-in-oil mieroemulsion system of Triton X-100, 1-hexanol, cyclohexane and Fe（NO3）3 aqueous solution, α－Fe2O3 ultrafine particles were prepared by the method of precipitation using NH3. From transndssion electron ndcrographs the mean dianreter of particles is about 3nm. The trifornlity of particle is good. These result have been confirmed by the method of Mossbauer spectrum measurement. The conditions of preparation of α－Fe2O3 ultrallne particles could be controlled easily and the reaction medium could be used cyclically.
文摘A palladium(Ⅱ) complex, PdLCl2·PdCl4, L=4-bromo-2,6-bis(N,N-diethylaminomethylene)pyridine, was synthesized and its crystal structure was determined by X-ray analysis. The complex crystallizes in monoclinic system with space group Cc, a=0.845 1(17) nm, b=1.836 5(4) nm, c=2.715 8(5) nm, β=93.99(3)°, V=4.204 8(15) nm3, Z=4, R1=0.037 7 and wR2=0.076 9. The coordination geometry of the Pd atom in the cation is a slightly distorted square planar, with one pyridyl N and two N atoms of the diethylamine ligand, together with one Cl atom. The dihedral angle between the square planar (N3PdCl) and the pyridyl ring is 10.3(4)°. CCDC: 623421.
文摘A dipyrazol-bridged macrocyclic palladium(II) complex [{Pd(en)}4L4](NO3)8 (en=ethylenediamine, L=3,3′,5,5′-tetramethyldipyrazol) 1 was prepared in water through a macrocyclization of cis-(ethylenediamine)Pd(II) nitrate and the neutral form of the dipyrazol ligand 3,3′,5,5′-tetramethyldipyrazol. This cationic palladium macrocycle is highly distorted rather than a planar macrocycle and can hold eight nitrate anions around the macrocyclic framework through both hydrogen bonding and electrostatic interactions. CCDC: 192017.
