Colleges of Heilongjiang Province

Harbin, China

Colleges of Heilongjiang Province

Harbin, China
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Ding G.,Colleges of Heilongjiang Province | Ding G.,Harbin Normal University | Li C.,Harbin Normal University | Han X.,Harbin Normal University | And 5 more authors.
PLoS ONE | Year: 2015

Isoetes sinensis Palmer (Isoetaceae) is a critically endangered fern that is a marsh plant (that is an aquatic or amphibious plant) in China. To evaluate damage or influence of lead (Pb) on cell ultrastructure in I. sinensis, we used 2000mg L-1 Pb(NO3)2 solution to treat I. sinensis for 35d, and used transmission electron microscope (TEM) to observe the cell ultrastructure of leaf blades and roots of the plant. Our results indicated that Pb induced distinct changes of the organelles including chloroplast, mitochondria, nucleolus and vacuole. The level of damage organ was lower leaf > upper leaf > root The typical performance of the damages caused by lead shown that part of the nucleolus cracked; the cristae dilated, matrix vacuolized and membrane structure blurred in mitochondria; the vacuole cracked; grana lamella decreased, stroma lamella loosed, starch grains decreased, and membrane structure was disrupted in chloroplasts; Pb deposits were present on cell wall. The damages to chloroplasts and mitochondria were relatively severe, while damage to the nucleus was relatively lighter. The damage to the cell ultrastructure of leaf blades with direct contact with Pb was more severe than that without direct contact with Pb. © 2015 Ding et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Deng C.,Colleges of Heilongjiang Province | Deng C.,Harbin Normal University | Sun Y.H.,Colleges of Heilongjiang Province | Zhang S.,Harbin Engineering University | And 6 more authors.
International Journal of Electrochemical Science | Year: 2012

Nanostructured Li 2MnSiO 4/C was synthesized by a modified sol-gel method. X-ray diffraction pattern confirms the formation of orthorhombic structure with group space Pmn2 1. SEM and TEM observations show nanostructured particles of about 80 nm and a thin surface layer of residual carbon. Raman analysis reveals the carbon is mainly amorphous. Electrochemical testing results indicate improved charge/discharge capacities and cycling performance of Li 2MnSiO 4/C compared with the pristine Li2MnSiO4. Indicated by EIS results, Li 2MnSiO 4/C has smaller change transfer resistance than the pristine Li 2MnSiO 4, which suggests its enhanced conductivity and results in the improved electrochemical properties. © 2012 by ESG.

DandanTu,Colleges of Heilongjiang Province | Wu B.,Colleges of Heilongjiang Province | Wang B.,Colleges of Heilongjiang Province | Deng C.,Colleges of Heilongjiang Province | Gao Y.,Colleges of Heilongjiang Province
Applied Catalysis B: Environmental | Year: 2011

A carbon-supported PdSn (PdSn/C) catalyst was prepared by a chemical reduction method with the aid of microwave radiation and was characterized by X-ray diffraction spectroscopy and energy dispersive spectroscopy. Formic acid electrooxidations on PdSn/C and Pd/C catalysts were investigated and compared in an acidic medium by voltammetry and chronoamperometry. The results show that the performance of the PdSn/C-3 catalyst which ratio of Pd:Sn is about 3:1 for formic acid oxidation is greatly improved compared with that of Pd/C; thus, PdSn/C-3 is a promising candidate as an anode catalyst in direct formic acid fuel cells. Additionally, the value of the apparent activation energy shows that the activity of formic acid oxidation on the PdSn/C is sensitive to the temperature at relatively high potentials. © 2011 Elsevier B.V.

Zhang Y.-N.,Harbin Institute of Technology | Zhang Y.-N.,Jiamusi University | Zhou B.-B.,Harbin Institute of Technology | Zhou B.-B.,Colleges of Heilongjiang Province | And 3 more authors.
Inorganic Chemistry Communications | Year: 2010

A new inorganic open framework based on manganese phosphomolybdate, (C2N2H10)4{Mn3[P4Mo6O26(OH)5]2}·6H2O (1), has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, IR spectroscopy and TG analysis. Single-crystal X-ray diffraction analysis reveals that compound 1 exhibits a 4,8-connected three-dimensional inorganic open framework with (41261284) (46)2 topology and possesses three-dimensional channels filled by the protonated H2en ligands and water molecules. Additionally, DC susceptibility measurement shows the antiferromagnetic character of the exchange interactions in compound 1. © 2010 Elsevier B.V. All rights reserved.

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