Shen M.,Yangzhou University |
Yao Y.,Yancheng Normal College |
Zhang J.,Yangzhou University
Jiangsu Daxue Xuebao (Ziran Kexue Ban)/Journal of Jiangsu University (Natural Science Edition) | Year: 2010
The octadecylamine-capped gold nanoparticles with different morphologies such as spherical and pine needle-like were successfully synthesized by using formic acid as a reducing agent in octadecylamine (C18NH2)/n-butanol/n-heptane/formic acid/HAuCl4 · 4H2O W/O microemulsion system through microwave dielectric heating. The C18NH2-stabilized gold nanoparticles were characterized by UV-vis, TEM, XRD and CA (contact angle), respectively. The effects of molar ratio of C18NH2 to HAuCl4 and the formic acid amount on the shape and size of gold nanoparticles were also explored. The experimental results showed that the size of nanoparticles gradually increased with the decrease of molar ratio to C18NH2 to HAuCl4 while the morphologies of particles gradually changed from spherical to pine needle-like. When the molar ratio of C18NH2 to HAuCl4 was fixed, the morphologies of gold nanoparticles also changed from spherical to pine needle-like with the increase of formic acid.
Liu X.-Z.,Nanjing Normal University |
Song W.-L.,Nanjing Normal University |
Cai X.-Z.,Yancheng Normal College |
Dai C.-C.,Nanjing Normal University
Chinese Traditional and Herbal Drugs | Year: 2011
Objective: The NaCl stress conditions were simulated to study the effect of the endophytic fungi C1, C4 on antisalty characteristic of Chrysanthemum morifolium in the adverse circumstance. Methods: Endophytic Botrytis sp. (C1) and Chaetomium globosum (C4) were inoculated to the C. morifolium plantlets which were planted in the pots in order to research the effects of salt stress on physiological indicators of C. morifolium. Results: With the increase of NaCl concentration, the water content of root and leaf decreased in every group. The loss of root and leaf's water in fungi-treated group was smaller than that in the control group. SOD activities in every group increased with the increase of NaCl concentration, and achieved the peak value at 20 g/L NaCl. The SOD activity in fungi-treated group was higher than that in the control group. Soluble protein of fungi-treated group was higher than that in the control group, and C4 group surpassed C1 group. POD activity increased firstly and then decreased, and compared to the control group, the POD activities in C4 and C1 groups increased by 25.50% and 1.35%, respectively at 15 g/L NaCl. PAL activity of C4 treated group was seven folds compared to the control group at 15 g/L NaCl. Conclusion: Endophytic fungi could enhance the salt-tolerant ability of C. morifolium, and the effect in C4 group was better than C1 group.
Song W.,Nanjing Normal University |
Liu X.,Nanjing Normal University |
Cai X.,Yancheng Normal College |
Sun D.,Nanjing Normal University |
Dai C.,Nanjing Normal University
Zhongguo Zhongyao Zazhi | Year: 2011
The effect of the endophytic fungi Botrytis sp. (C1) or Chaetomium globosum (C4) on the drought resistance of Chrysanthemum morifolium was studied. Ch. morifolium plantlets were inoculated with C1, C4 and cultured in the pots for 60 days, then the plandets were stressed by 0%, 10%, 20%, 30%, 40% PEG6000 respectively in order to simulate different drought conditions. Biomass, the activities of SOD, POD, PAL, the contents of MDA and soluble protein of each group were determined. The results showed that endophytic fungi groups grew better than the control (without inoculation endophytic fungi). With the increasing of the concentration of PEG6000, the biomass of Ch. morifolium of each groups decreased, while the biomass of fungi groups was significandy higher than that of control, moreover C4 group higher than C1 group. With the concentration of PEG increasing, the content of MDA of each group increased too, while POD activity and soluble protein content of all treatments increased at first and then decreased. SOD activity and PAL activity of the control were increased with the increase of PEG concentration, but SOD activity of the two fungi groups were stable. After been stressed by different concentrations of PEG, MDA content of two fungi groups were always lower than the control, while SOD activity, POD activity, PAL activity and soluble protein content were higher. In conclusion, endophytic fungi can increase the drought resistance of Ch. morifolium.
Mao F.L.,Hunan University |
Mao F.L.,Yancheng Normal College |
Li W.S.,Hunan University |
Zhou X.P.,Hunan University
Advanced Materials Research | Year: 2011
The disproportionation reaction of glycerol over NaOH was reported in this article. The effects of reaction temperature, glycerol to NaOH mol ratio, glycerol concentration in calcium carbonate, and reaction time were investigated. Under the optimum conditions, 82.6% of glycerol conversion with 44.6% of total alcohol selectivity (propylene glycol, ethylene glycol, methanol, and ethanol) was obtained. © (2011) Trans Tech Publications.
Qi Z.-J.,Nanjing Southeast University |
Wang X.-M.,Yancheng Normal College |
Wei B.,Nanjing Southeast University |
Kang F.,Nanjing Southeast University |
And 3 more authors.
Journal of Applied Polymer Science | Year: 2011
Four novel highly soluble p-/n-poly[(2,5-divinyl-3,4-dialkylthiophene)-alt- 2,6-pyridine] (PA2TV-Py) and poly[(2,5-divinyl-3,4-dialkylthiophene)- alt-(2,5-diphenyl-1,3,4-oxadiazole)] (PA2TV-OXD) are prepared by Heck coupling approach to compare their photoelectric properties. Characterizations of the copolymers include FT-IR, 1H-NMR, gel permeation chromatography (GPC), thermogravimetric analysis (TGA), UV-vis spectroscopy, photoluminescence (PL), and electroluminescence (EL). Four alt-copolymers exhibit excellent solubility in common organic solvents (e.g., CHCl3, THF) and good thermal stabilities, losing less than 5% on heating to ∼ 250°C. The optical properties depict that the band-gap energy of PA 2TV-Py and PA2TV-OXD is similarly, ranging from 2.68 to 2.80 eV in solid film and 2.90-2.97 eV in CHCl3 solution. PA 2TV-Pys can emit bright turquoise light with quantum efficiencies (QE) of 30.6 and 53.9%, which about 10-18 times higher than that of homopolymer in CHCl3 solution. Furthermore, the QE of two PA2TV-OXDs (purple fluorescence) are increased to 43.6 and 68.5%, respectively, about 1.3-1.4 times higher than that of PA2TV-Pys. Electrochemical results indicate that the electron affinity (Ea) of four alt-copolymers range from 2.79 to 3.09 eV, which are propitious to electrons injecting and transporting from the cathode. As a result, these novel copolymers present expected good electroluminescence(EL) performance in their single layer polymer light-emitting device (PLED) with configuration of ITO/polymer/Al, which turn-on voltages are between 4.0 and 5.8 V and emit bright green-yellow (538 nm) and yellow (545-552 nm) EL light. © 2011 Wiley Periodicals, Inc.