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Magnetic Properties and Giant Magnetocaloric Effects on the NiMn0.9Sb0.1 Compound
Yingde Zhang,Peng Zhang,김경섭,N. H. Dan,Xueling Hou,유성초 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.57 No.61
We have studied the magnetization behavior and the magnetocaloric effect for the NiMn0.9Sb0.1 Heusler alloy. The sample was prepared by arc-melting in an argon atmosphere. For homogeneity of the samples, the ingot was melted several times. The temperature dependence of the magnetization of the sample was measured using a vibrating sample magnetometer in the magnetic field range up to 10 kOe. A large entropy change was observed from the H versus M curves associated with the ferromagnetic-paramagnetic transition. The maximum entropy change was 2.36 J/kg K at 697.5 K. Our results indicate that the present NiMn0.9Sb0.1 alloy is a good candidate as working material for a magnetic refrigerant.
( Jiwei Duan ),( Jun Liu ),( Xueling Ma ),( Yue Zhang ),( Xiaohua Wang ),( Kai Zhao ) 한국미생물 · 생명공학회 2017 Journal of microbiology and biotechnology Vol.27 No.1
Termites are destructive to agriculture, forestry, and buildings, but they can also promote agro-ecosystem balance through the degradation of lignocellulose. Termite-triggered cellulose digestion may be clarified through microbial metabolism of cellulose products. In the present study, we characterized the activities of cellulase and its three components synthesized by the cellulase-producing fungal strain HDZK-BYTF620 isolated from the gut of Odontotermes formosanus. The protein components of cellulases were synthesized by strain HDZK-BYTF620, which were isolated and characterized using polyacrylamide gel electrophoresis, and the expression of the cellulases was studied at the proteome level.
Tao Yang,Sibo Wang,Xuyong Zhang,Jie Xia,Jun Guo,Jixue Hou,Hongwei Zhang,Xueling Chen,Xiangwei Wu 대한기생충학열대의학회 2016 The Korean Journal of Parasitology Vol.54 No.2
Human and animal alveolar echinococcosis (AE) are important helminth infections endemic in wide areas of the Northern hemisphere. Monitoring Echinococcus multilocularis viability and spread using real-time fluorescent imaging in vivo provides a fast method to evaluate the load of parasite. Here, we generated a kind of fluorescent protoscolices in vivo imaging model and utilized this model to assess the activity against E. multilocularis protoscolices of metformin (Met). Results indicated that JC-1 tagged E. multilocularis can be reliably and confidently used to monitor protoscolices in vitro and in vivo. The availability of this transient in vivo fluorescent imaging of E. multilocularis protoscolices constitutes an important step toward the long term bio-imaging research of the AE-infected mouse models. In addition, this will be of great interest for further research on infection strategies and development of drugs and vaccines against E. multilocularis and other cestodes.
( Dan Li ),( Dongwei Fu ),( Yue Zhang ),( Xueling Ma ),( Liguo Gao ),( Xiaohua Wang ),( Dongpo Zhou ),( Kai Zhao ) 한국미생물생명공학회(구 한국산업미생물학회) 2017 Journal of microbiology and biotechnology Vol.27 No.8
The content of taxol in the bark of yews is very low, and this is not affordable from the environmental point of view. Thus, it is a necessity to look for alternative sources of taxol production to solve its supply. Currently, a large portion of the taxol in the market comes from chemical semi-synthesis, but the semi-synthetic precursors such as baccatin III and 10- deacetyl-baccatin III are extracted from needles and twigs of yew trees. Taxol-producing fungi as a renewable resource is a very promising way to increase the scale of taxol production. Our group has obtained a taxol-producing endophytic fungus, Aspergillus niger subsp. taxi HD86-9, to examine if A. niger can produce the taxanes. Six compounds from the fermentation broth of strain HD86-9 were isolated and identified by <sup>1</sup>H NMR, <sup>13</sup>C NMR, and ESI-MS. The results showed that the six compounds included four taxane diterpenoids (taxol, cephalomannine, baccatin III, and 10-deacetyl-baccatin III) and two non-taxane compounds (β-sitosterol and flavonoid isovitexin). The study verified that the taxanes can be produced by the A. niger, which is very important to taxol production via chemical semi-synthesis. Additionally, the finding is potentially very significant to solve the taxol semi-synthetic precursors extracted from needles and twigs of yew trees, and the precursor production can be easily increased through the culture condition optimization, genetic breeding, and metabolic engineering of the A. niger.