The ultrafast processes of tetra-phenyl-porphyrin(TPP), tetra-t-butyl-phthalocyanine(BuPc) and nitro-tri-t-butyl-phthalocyanine (NtBuPc) have been investigated using the femtosecond time-resolved fluorescence depletion method. A sharp peak of the fluorescence depletion with delay time has been observed both for TPP and BuPc. An ultrafast two-photon absorption process has been proposed to explain the sharp peak observed. A long-lived fluorescence depletion has also been observed. It is causing by the stimulated-emission-pumping process produced by the intense probe laser pulse.

 A general model is suggested for the kinetics of clustering processes. It is considered that cluster species are composed of units of specific composition. Arbitrary combinations occur between the species. The association rate constant depends on the cluster size and the structural feature. The dissociation rate constant mainly depend on the number of bonds broken during dissociation. Thus the small fragments are easier to be cleavaged. The master equations for the kinetic model are given. They can be used for the numercial calculation of the cluster distribution at various time. Finally, the clustering processes during laser ablation and arc discharge are discussed.

The absorption and emission properties of H2Pc(OiPr)4 were studied as a function of protonation and deprotonation. Stepwise protonation using TFA yielded [H2Pc(OiPr)4•H+]+ and [H2Pc(OiPr)4•2H+]2+. [H2Pc(OiPr)4•4H+]4+ can be formed in concentrated sulfuric acid. Additionally, the NaOH/EtOH can deprotonate H2Pc(OiPr)4 to [Pc(OiPr)4]2-, the acid-dissociation of the two pyrrolic -NH occurred synchronous. Manifest bathochromic shifts of the Q band absorption for each bound proton indicated the basicity of phthalocyanine in the excided state is stronger than that in the ground state. In order to explain the experimental phenomena, the effects of protonation and deprotonation on MOs were proposed.

Based on the kinetic model of clustering processes proposed in the preceding paper, the clustering process for carbon clusters has been simulated. The results indicate that this process is an arbitrary addition process and the reaction rate decreases with the increase of cluster size. The middle size carbon clusters (20＜n＜50) have abnormal larger reaction rates, indicating that there are more peripheral carbon atoms in these clusters and they are bowl-like. Having considered the above important factors, the size distribution is successfully simulated. The differences of kinetic parameters are mainly due to the geometrical configuration.

 Dissociation studies of mass-selected cluster ions have been carried out on a home-made apparatus. From analysis of the recorded dissociation mass spectra, it was found that fragmant distribution of dissociated cluster ions follows a statistical distribution model. In this paper, kinetic equations of two dissociation pathways are discussed and their analytical solutions are presented. Based on the distribution functions, recorded dissociation mass spectra of cluster ions are analyzed and attributed to the different fragmentation channels.

Growth Characteristics of Mycobacterium E3 on ethene in mineral salts medium and oxidation of alkanes and alkanes catalyzed by Mycobacterium E3 resting cell were studied. Mycobacterium E3 was unable to catalyze hydroxylation of alkanes, but able to catalyze epoxidation of alkenes specifically. Influence of substituents on epoxidizing activity was discussed for allyl substrates XCH2CH=CH2 (X=H, Cl, Br, OH). Alkene monooxygenase and an unknown enzyme in Mycobacterium E3 catalyzed stereoselective epoxidation of alkenes and not-stereoselective degradation of epoxides. Optical rotation and chiral capillary chromatography revealed that propene and 3-chloro-1-propene were epoxidized to (R)-1,2-epoxypropane and (S)-1-chloro-2,3- epoxypropane.

GaSb is an important compound semiconductor. This paper reports the etching of GaSb, and the formation and dissolution of the oxidized layer of GaSb using electrochemical and photoelectrochemical methods. The major composition of the GaSb oxidized layer was found to be antimony oxides which are difficult to dissolve in aqueous solution. This layer could prevent the surface from being further etched, and could make the semiconductor losing its photoelectrochemical properties. Addition of tartaric acid, citric acid and hydrofluoric acid into the solution improved the etching. The method of measuring the flatband potential of the interface between GaSb and electrolyte has also been investigated.

 The half inhibitory concentrations of the Schiff base drugs effect on S. sureus and Aerobacter aerogenes were compared. The effect of the schiff base drugs of which some have the same metal cation, but different ligands, or some have the same ligands but different metal cations on bacteria was discussed. A lot of useful information was obtained.

 With Y2O3/carbon composite rods, Y@C2n(2n=60, 70, 80, 84, 90 and 96)and Y2@C76 are synthesized by two-steps arc-vaporizing method and extracted from the soot with CS2 under the protection of inert gas. The samples are characterized by field desorption mass spectrometry (FDMS) and electron paramaganetic resonnance (EPR). It is also found that Y@C84 and Y@C90 are the most abundant and stable.

In this paper, based on ab initio with gradient technique, the intrinsic reaction coordinate (IRC) of the reaction CN+H2→H+HCN has been traced by using numerical method. Along the IRC, the coupling constants between the IRC and vibrations ortho nal to it, and the vibrational frequencies have all been investigated. The theoretical rate constants for vibrationally excited reactants nCN =1 or nCN = 0 in the conventional transition state theory, variational transition state theory and with tunneling corrections have been calculated. They are in od agreement with experimental results. HCN(nCN=1, nCH=1)+H→CN+H2 reaction rate constants have also been calculated in this paper, and the theoretical results are for experimental reference only.

DV-Xa molecular orbital calculations have been performed on a series of metal carbide clusters to examine the effect of the C2 coordination environment on the electronic structures. It was found that the La 5d and C 2p bands are well-separated and the bonding is nearly ionic character in La6C215+ cluster. The covalency becomes more important if the La atoms in La6C15+2 are replaced by Ni to form the La4Ni4C216+cluster where the Ni 3d and C 2p bands are almost completely overlapped, indicating a strong Ni-C covalent interaction. Moreover, in Sc5Ni4C218+ cluster, besides the Ni-C and C-C covalent interactions there exist also the strong metal-metal bonds due to the two-dimensional Ni-Ni network.

The concentration effecs of thiourea and it’s derivatives on the corrosion behaviour of iron electrode in H2SO4 solution are measured by polarization curves. The anodic and cathodic effective coefficients of these inhibitors in Ecorr are calculated. The frontier molecular orbital energy levels and the net charge of polar atoms of these inhibitors are calculated by EHMO method. The results show that, these structure coefficients are closely related to the corrosion effective coefficients.

In this paper, the SERRS of BATD has been investigated, the effect of pH, concentration and electrolyte on SERRS was discussed and the adsorbed state of BTAD was figured. We suggest that the adsorbed state of BTAD is the bonding of benzotriazol to Ag surface via lone pair electron on the nitrogen. With HCl and ascorbic acid aggregate Ag sol, the dependence of SERRS on BTAD concentration behaves differently. In the former case, the adsorbed state changes, but in the latter it remains the same. Small amount of electrolyte will induce the active sites on the surface, but when it is more than 1×10-2mol﹒L-1, the competent adsorbtion reduces the Raman scattering intensity. Hydrogen ions protonize BTAD to BTAHD and reduce the contribution of lone pair electron on N atom of the conjugated system.

Pure zirconia and zirconia containing Y or Ce were prepared by Supercritical Drying Method (SCD) followed by calcination in air at temperature up to 700℃. It was found that the zirconia containing Y or Ce possessed much higher specific surface area and larger pore volume than that of pure zirconia. The BET surface area of 3.4Y2O3-96.6ZrO2 without calcination and that calcined at 700℃ were 376.2 m2﹒g-1 and 80.0 m2﹒g-1 respectively, while the corresponding values of pure zirconia were 248.0 m2 ﹒g-1 and 47.8 m2﹒g-1 respectively. It was postulated that the better textural properties of zirconia containing Y or Ce were resulted from preventing zirconia particles sintering in the presence of Y or Ce additive. All of these samples made by SCD had a well-developed mesoporous texture.

The morhology of the organized assemblies of C10H21-O-ph-CH=CH-ph-CH3I (C10OMI) in aqueous dispersions is long rod-like or vesicular. In neutral dispersions, addition of sodium dodecylsulfate (C12SO4Na) induces the transition from long rods to vesicles, and hence the closer packing of C10OMI, forming the "H-aggregate" with a blue-shift of absorption spectrum. Under acidic conditions, C12SO4Na makes the vesicles of C10OMI to aggregate: It is suggested that the hydrophobic chain of C12SO4Na does not penetrate into the bilayers of C10OMI at low concentration. When the concentration of C12SO4Na reaches its CMC, C10OMI will be solubilized both in neutral and in acidic dispersions, so that the monomer absorbtion appears.

La0.95Ca0.05F2.95 polycrystalline solid electrolyte tube was prepared. The La sensor was made by using such solid electrolyte tube, pure La as reference electrode and Mo wire as lead wire. the cell can be experssed as:
Mo|La(S)| La0.95Ca0.05F2.95|[La]Al|Mo Ceramal
The activities of dissolved La in liquid (750℃) aluminum with three different La concentrations were determined. The change of La activity and po2 with temperature in the solidfication process (750-500℃) was also determined, the result showed some regularities existed. In the course of rising and falling of temperature the La probe can be used repeatly 2-3 times.

The surface and interface between anodic oxide film and aluminum substrate have been studied by AES、 HREM and TEM. The anodic oxide film of aluminum formed in sulfuric acid electrolyte has porous structure and the main composition is amorphous Al2O3, the sulfate exists in the whole film, and enriches between cells of the film. There is a transition layer (thickness: ~ 6 nm), which consists of oxides and aluminum ion between anodic oxide film and aluminum substrate. The presence of this transition layer causes the expansion of the interface and increases the adhesion strength between anodic oxide film and aluminum substrate.

Using microcalorimetric method, the thermally measured curves of different types of metabolism of E. coli were determined. From these thermal measured curves, we can obtain the heat output of E. coli at growth metabolism to be 1 .74+10.63 pW.cell- 1; and0.14+0.04 pW.cell-1 at the non-growth metabolism while at the endogenous metabolismit is 0.045+0.001 pW﹒cell-1

The determination of the osmotic coefficients of the aqueous solution of polyhydroxylated compounds such as glycol, glycerol, sucrose and glucose by Vapour Pressure Osmometry at 313, 323 and 333K was carried out over the concentration range of 0.0-2.1mol﹒kg-1 and 0.0-2.0 mol﹒kg-1 respectively. By using a linear least-square fitting routine, the osmotic coefficients were fitted by a simple polynomial equation, It was found that the relation between the experimental results of molal osmotic coefficients Φ and the mass molal concentration of the solution m are in agreement with that from the polynomial fitting at different temperature. Factors which influence the osmotic coefficient such as the number of hydroxyl of polyhydroxylated compounds or the molecule weight of the solute molecules should be further studied, this work will also contribute to the studies of other thermodynamical properties of the aqueous solution of polyhydroxylated compound.