5 research outputs found
THE EFFECT OF TRITON X-100 ON THE STABILITY OF POLYSTYRENE LATTICES
No full textThe effect of a nonionic surfactant, Triton X-100, on the stability of monodisperse polystyrene latices was investigated. It was found that at high surfactant concentration, coagulation rather than stability was induced by the presence of the surfactant. A depletion flocculation mechanism is suggested to interpret the destabilization of polystyrene latices in concentrated micellar solution of Triton X-100.Chemistry, PhysicalSCI(E)EI38ARTICLE11-72
MIXED ADSORPTION OF SODIUM DODECYL-SULFATE AND ETHOXYLATED NONYLPHENOLS ON CARBON-BLACK AND THE STABILITY OF CARBON-BLACK DISPERSIONS IN MIXED-SOLUTIONS OF SODIUM DODECYL-SULFATE AND ETHOXYLATED NONYLPHENOLS
No full textAdsorption of sodium dodecyl sulfate (SDS) and ethoxylated nonylphenols (NP-12, NP-40 and NP-100) from their mixed solutions on carbon black and the stability of carbon black dispersions in SDS-NP mixed solutions have been investigated. The adsorption isotherms of either SDS or NP alone on the surface of carbon black are shown to be of the Langmuir type, and the amount of NP adsorbed decreased with increasing number of ethylene oxide (EO) units in the NP molecules. In the mixed solutions of SDS and NP, the adsorption of both SDS and NP on carbon black decreased in the presence of the other component, and the amount of one component adsorbed varied in an inverse-linear relationship with that of the other, indicating a displacement mechanism of adsorption for the two surfactants on carbon black. The stability of carbon black dispersions in mixed solutions of SDS and NP was demonstrated to be consistent with the displacement mechanism of the mixed adsorption.Chemistry, PhysicalSCI(E)EI28ARTICLE3215-2216
ADSORPTION FROM MIXED-SOLUTIONS OF POLYVINYL PYRROLIDONE) AND SODIUM DODECYL-SULFATE ON TITANIUM-DIOXIDE
No full textAdsorption of sodium dodecyl sulfate (SDS) and poly(vinyl pyrrolidone) (PVP) from their mixed solutions onto a titanium dioxide (TiO//2) surface shows synergistic effects at low SDS concentrations and antagonistic effects at high SDS concentrations. It is suggested that this is due to complex formation between SDS and PVP: surface complexes at low SDS concentration and solution complexes at high SDS concentration.Chemistry, PhysicalSCI(E)EI31ARTICLE2185-1911
Novel bis(phthalocyaninato) rare earth complexes with the bulky and strong electron-donating dibutylamino groups: synthesis, spectroscopy, and SMM properties
No full textStrong electron-donating dialkylamino groups were incoporated onto the phthalocyanine ligand in bis (phthalocyaninato) rare earth complexes for the first time to investigate their effects on the spectroscopic properties, electrochemistry, and electronic structure. The bis[2,3,9,10,16,17,23,24-octakis(dibutylamino) phthalocyaninate] rare earth complexes M{Pc[N(C4H9)(2)](8)}(2) {Pc[N(C4H9)(2)](8) = 2,3,9,10,16,17,23,24-octakis (dibutylamino) phthalocyanine, M = Y, Tb} (1, 2) were isolated from the condensation reaction of the corresponding metal free ligand in a refluxing mixture of n-octanol/1,2,4-trichrolobenzene (TCB) (1 : 5) in the presence of M(acac)(3)center dot nH(2)O (M = Y, Tb) in relatively good yields, with their sandwich double-decker nature revealed on the basis of their mass, H-1 NMR, electronic absorption, IR, and EPR spectroscopic results in addition to elemental analysis. Their electrochemistry was investigated by cyclic voltammetry (CV). In particular, magnetic studies reveal the typical slow relaxation of the terbium double-decker, indicating its typical single-ion magnet (SIM) nature with a blocking temperature of 25 K and a spin reversal energy barrier of 752 +/- 8 K, representing the sole example of sandwich-type tetrapyrrole lanthanide-based SMMs reported thus far with a blocking temperature over 20 K. Theoretical calculations disclose the effect of the bulky and strong electron-donating peripheral dialkylamino groups, which create a square-antiprismatic coordination geometry and intensified coordination field strength for the central terbium ion, resulting in the excellent magnetic performance of this terbium double-decker SIM.National Key Basic Research Program of China [2013CB933402]; Natural Science Foundation of China [21290174, 21631003, 21671017, 21301017, 21401009]; Beijing Municipal Commission of Education; University of Science and Technology BeijingSCI(E)ARTICLE91465-1471
Brecht and China : a mutual response
No full textThis thesis deals with the cross-cultural relations between Brecht and China
through an analysis of how Brecht responded to the traditional Chinese theatre and
how his drama was received in turn by modern Chinese theatre. It attempts to
examine the respective socio-cultural or political contexts wherein such kind of crosscultural
contacts were needed, and the consequent aesthetic-theatrical as well as
socio-cultural or political changes brought about by these contacts that have produced
two distinctively independent yet related forms of theatre.
It is argued that Brecht's search for a theatre style of his own amidst the sociocultural
as well as political crises between the two world wars made him look to the
East for inspirations, and his direct encounter with Mei Lanfang enabled him to
interpret the latter's acting in such a way that he responded to it with his postulation of
the alienation effect and modification of a gestic performance style. His repudiation
of the well-made dramatic theatre brought his epic theatre closer to the traditional
Chinese theatre whose aesthetic principles he shared in constructing a non-
Aristotelian episodic form of drama. In his experimentations with new modes of
theatrical expressions, he did not simply borrow or copy the forms and content of
classical Chinese drama; he appropriated, transformed and renewed them, for
example, in The Caucasian Chalk Circle, for the particular purpose of instructing
audiences in a scientific age.
China! s reception of Brecht has had much to do with the country's changing
socio-cultural as well as political situations. Chinese theatre practitioners responded
to him because he was a politically, culturally and aesthetically suitable figure. His
epic drama provided an alternative style for the Chinese in their attempt to innovate
their realist spoken drama imported from the West, and was also introduced into local
forms of performing arts in hope that the traditional Chinese theatre could be
resurrected. Furthermore, he prompted Huang Zuolin to theoretically re-examine
Chinese operas, which the latter integrated with techniques of Brecht and
Stanislavsky into spoken drama to establish a new theatre style called Xieyi drama
