A STUDY OF NEW RHODIUM COMPLEX WITH CARBORANE LIGAND

The complex [closo-3,3-(PPh_3)_2-3-H-3,1,2-RhC_2B_9H_(11)]has a rich derivative chemistrythat is currently under active investigation.The resultant compound shows an increasing stabilitythat is often associated with metallocarboranes.This paper deals with the novel and the produc-tion area of carborane complexes of transition metals.The paper indicates that some reactions can easily proceed and the resulting compound hassome new properties and uses.K[18-crown-6][closo-3-Ph_3P-3-CH_2Ph-3-Br-3,1,2-RhC_2B_9H_(11)]can be synthesized by the reaction of K[18-crown-6][(Ph_3P)_2RhC_2B_9H_(11)]withbromo-toluene under the condition of dry benzene.IR and ~1H,~(11)B,~(31)p nuclear magnetic reso-nance and elemental analysis comfirm the structure for this species with one carborane groupbonded to the central metal.     

EFFECT OF VISCOSITY OF LUBRICANT IN FRICTION

The movement of lubricated fibres in a fibre assembly is investigated theoretically and aviscous sliding model of friction is proposed.Previous work and experimental results are discussedin relation to the model.Results of drawing experiments carried out on wool slivers are also pres-ented and discussed.     

MICROSTRUCTURE OF AGGREGATES IN DISPERSIONS DESCRIBED IN TERMS OF RADIAL DISTRIBUTION FUNCTION

Following a sticky particle model and its computer simulation scheme proposed in the previous papers, the motions of particles in both 2-and 3-dimensional shear flow fields are simulated. At a steady state of clustering process, the radial distribution functions are calculated to precisely describe the microstructure of aggregates in dispersions, and the configuration of particles is displayed,which gives a direct view of microstructure. It is found that (1) the kind of the microstructure transforms from compact clusters to a loose network as the concentration of particles increases; (2) the microstructure is independent of shear rate which only dominates the size of clusters formed at steady state.     

ADSORPTION AND FLOCCULATION BEHAVIORS OF ILMENITE AND FELDSPAR IN THE PRESENCE OF SULPHONATED POLYACRYLAMIDE——Experimental

The adsorption of Sulphonated polyacrylamide(PAMS)on ilmenite and feldspar fromaqueous solution and the floeculation of minerals by PAMS have been studied.The researchresults reveal that the strong adsorption of PAMS on ilmenite results in its strongflocculation and the weak adsorption of PAMS on feldspar causes its dispersion to be morestable.The mechanism of PAMS bonding is discussed in terms of co-ordination and H-bonding interaction respectively in the light of molecular orbit.The co-ordination between—So_3~- on PAMS chain and sites of Ti~(4+) or Fe~(2+) on ilmenite was testified by electron spec-troscopy(PHI550ESCA/AES).Consequently new technology“Bulk flocculation-magneticsepa-ration-ultrasonic deflocculation-magnetic separation”for fine ilmenite/titano-magnetite/feld-spar system has been successfully developed.     

BIOGENESIS OF THYLAKOID MEMBRANES WITH RECONSTRUCTION OF CHLOROPHYLL-PROTEIN COMPLEXES IN DELETION-MUTANT OF ORF469 IN BLUE-GREEN ALGA

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