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Longnan, China

Yang J.D.,Longnan Normal College | Yang J.D.,Northwest Normal University | Lu X.Q.,Northwest Normal University
Chinese Chemical Letters

Self-assembled monolayers (SAMs) of thiol-derivatized porphyrin molecules on Au substrate have attracted extensively interest for use in sensing, optoelectronic devices and molecular electronics. In this paper, tetra-[p-(3-mercaptopropyloxy)-phenyl]-porphyrin was synthesized and self-assembled with thiol on Au substrate for porphyrin SAMs (PPS 4). The electrochemical results demonstrated that PPS 4 could form excellent SAMs on gold surface. Self-assembled nanojunctions of PPS 4 were fabricated by using gold nanogap electrodes (gap width: ca. 100 nm). With the light on/off, the nanojunctions showed current high/low as nanometer scaled photo switch. © 2012 Jian Dong Yang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved. Source

Zuo G.,Tianshui Normal University | Wang Q.,Lanzhou Jiaotong University | Li Z.,Tianshui Normal University | Yang J.,Longnan Normal College | Wang P.,Tianshui Normal University
International Journal of Electrochemical Science

In this paper, cobalt porphyrin combining with reduced graphene oxide (RGO) through an aromatic π-π stacking interaction made up a cobalt meso-tetraphenylprophyrin-RGO (CoTPP/RGO) nanocomposite. This composite was well characterized by scanning electron microscopy (SEM), fluorescence and UV-vis spectrometry. The electrochemical behavior of CoTPP/RGO for electrocatalytic dioxygen reduction was studied on the surface of glass carbon electrode (GCE) modified with the composite by cyclic voltammetry (CVs). When the mass ratio of RGO to CoTPP is 1:1 in the composite, CoTPP/RGO film displayed superb electroreduction of oxygen. © 2015 The Authors. Source

Yang D.,Anhui Agricultural University | Yang D.,Longnan Normal College | Liang J.,Anhui Agricultural University | Wang Y.,Anhui Agricultural University | And 7 more authors.
Journal of the Science of Food and Agriculture

BACKGROUND: Tea waste is the residue that remains after tea leaves have been extracted by hot water to obtain water-soluble components. The waste contains a re-usable energy substrate and nutrients which may pollute the environment if they are not dealt with appropriately. Other agricultural wastes have been widely studied as substrates for cultivating mushrooms. In the present study, we cultivated oyster mushroom using tea waste as substrate. To study the feasibility of re-using it, tea waste was added to the substrate at different ratios in different experimental groups. Three mushroom strains (39, 71 and YOU) were compared and evaluated. Mycelia growth rate, yield, biological efficiency and growth duration were measured. RESULTS: Substrates with different tea waste ratios showed different growth and yield performance. The substrate containing 40-60% of tea waste resulted in the highest yield. CONCLUSION: Tea waste could be used as an effective and economic substrate for oyster mushroom cultivation. This study also provided a useful way of dealing with massive amounts of tea waste. © 2015 Society of Chemical Industry. Source

Ye W.-B.,Longnan Normal College | Fan L.,Longnan Normal College
Modern Food Science and Technology

In this study, the preservation effects of a compound coating of polysaccharide on Prunus avium L. at room temperature (25~28°C) and relative humidity (68~75%) were investigated. The antistaling agent was made using Sophoraalopecuroides bean galactomannan as the coating matrix. CaCl2 and citric acid were used as film-forming additives and glycerin was added to improve the film flexibility. The results showed that the use of the compound coating obviously lowered the rotten rate, cracking fruit rate and weightloss rates of Prunus avium L. preserved, inhibited the respiration rate and the loss of total Vc and organic acids and other nutrients. The contents of MDA and anthocyanin, as well as the relative conductivity, were effectively increased, thus resulting in lower PPO and POD enzyme activities. Use of the compound coating of Sophoraalopecuroides bean galactomannan may delay the senescence process during storage and extending the shelf life. Source

Cui W.,Longnan Normal College | Cui W.,Northwest Normal University | Zhang Y.,Northwest Normal University | Jia R.,Longnan Normal College | And 2 more authors.
Chinese Journal of Organic Chemistry

Three new Brøsted-acidic task-specfic ionic liquids (TSILS) that bear two butane sulfonic acid groups based on 1-(morpholinyl-4-yl)-3-(imidazolyl-1-yl)propane (mip) heternuclear dication: 1-[4-(4-sulfobutyl)morpholinium-4-yl]-3-[3-(4- sulfobutyl)-1H-imidazolium-1-yl]propane bis(trifluoromethane sulfonate) {A, [(C4SO3H)m(C4SO3H)i]p(OTf)2}, 1-[4-(sul- fobutyl)morpholinium-4-yl]-3-[3-(4-sulfobutyl)-1H-imidazolium-1-yl]propane bis(hydrogen sulfate) {B, [(C4SO3H)m(C4SO3- H)i]p(HSO4)2} and 1-[4-(4-sulfobutyl)morpholinium-4-yl]-3-[3-(4-sulfobutyl)-1H-imidazolium-1-yl]propane bis(bihydrogen phosphate) {C, [(C4SO3H)m(C4SO3H)i]p(H2PO4)2} were synthesized and characterized by NMR and FT-IR. The imidazolium-based and morpholinium-based single-SO3H functionalized acidic ionic liquids were used for comparison. Their catalytic activities were investigated in crossed-aldol condensation between cycloalkanone and various aromatic aldehydes. Hammett method has been used to determine the acidity order of these ionic liquids (ILs). The experiment results have shown that the catalytic activities of the three bi-SO3H-functionalized ILs were stronger than those of single SO3H functionalized ILs. Their acidity orders were consistent with their catalytic activities. Good adaptability to the reaction substrate and maximum product yield of 90% was observed when [(C4SO3H)m(C4SO3H)i]p(OTf)2 was used as catalyst and the catalyst can be reused at least ten times without obvious activity loss. © 2015 Chinese Chemical Society & SIOC, CAS Source

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