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Azhari Siddeeg,Yanshun-Xu,Qixing-Jiang,Wenshui-Xia 한국식품과학회 2014 Food Science and Biotechnology Vol.23 No.2
The physicochemical and functional propertiesof seinat seed flour (SSF), defatted seinat flour (DSSF),and protein isolates were studied. Protein was extractedfrom DSSF using an alkali solution with isoelectricprecipitation and freeze drying. Freeze dried seinat seedprotein isolates (FSSPI), SSF, and DSSF were evaluatedfor their physicochemical and functional properties. SSFcontained high levels of crude fat and fiber (31.13% and24.75%, respectively). FSSPI contained 91.83% proteinversus 28.58% for SSF. The amounts of potassium, themineral with the highest content, were 9,548.33, 6,439.03,and 1,029 mg/100 g in SSF, DSSF, and FSSPI, respectively. The functional properties were variable among samples. The protein solubility of FSSPI was significantly higher(p<0.05) than for DSSF and SSF. FSSPI has a significantlybetter (p<0.05) foaming capacity, water/fat absorptioncapacity, and bulk density than SSF and DSSF. FSSPI alsoshowed an emulsifying capacity comparable to commercialsoy protein isolates.
Synthesis of Ag/TiO<sub>2</sub> Core/Shell Nanoparticles with Antibacterial Properties
Lin, Yue,Qiqiang, Wang,Xiaoming, Zhang,Zhouping, Wang,Wenshui, Xia,Yuming, Dong Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
Monodispersed Ag/$TiO_2$ core/shell nanoparticles were synthesized in solution via colloid-seeded deposition process using Ag nanoparticles as colloid seeds and $Ti(SO_4)_2$ as Ti-source respectively. Silver nitrate was reduced to Ag nanoparticles with $N_2H_4{\cdot}H_2O$ in the presence of CTAB as stabilizing agent. The titania sols hydrolyzed by the $Ti(SO_4)_2$ solution deposited on the surface of Ag nanoparticles to form the Ag/$TiO_2$ core/shell nanoparticles. Inductively coupled plasma atomic emission spectrometry (ICP-AES) showed low amount of Ag ion leaching from the Ag/$TiO_2$ core/shell nanoparticles. The Ag/$TiO_2$ core/shell nanoparticles indicated excellent antibacterial effects against Escherichia coli and maintained long-term antibacterial property.
Mengzhen Hao,Yuhang Zhou,Jinhui Zhou,Min Zhang,Kangjiao Yan,Sheng Jiang,Wenshui Wang,Xiaoping Peng,San Zhou 고려인삼학회 2020 Journal of Ginseng Research Vol.44 No.5
Background: Ginsenosides accumulation responses to temperature are critical to quality formation in cold-dependent American ginseng. However, the studies on cold requirement mechanism relevant to ginsenosides have been limited in this species. Methods: Two experiments were carried out: one was a multivariate linear regression analysis between the ginsenosides accumulation and the environmental conditions of American ginseng from different sites of China and the other was a synchronous determination of ginsenosides accumulation, overall DNA methylation, and relative gene expression in different tissues during different developmental stages of American ginseng after experiencing different cold exposure duration treatments. Results: Results showed that the variation of the contents as well as the yields of total and individual ginsenosides Rg1, Re, and Rb1 in the roots were closely associated with environmental temperature conditions which implied that the cold environment plays a decisive role in the ginsenoside accumulation of American ginseng. Further results showed that there is a cyclically reversible dynamism between methylation and demethylation of DNA in the perennial American ginseng in response to temperature seasonality. And sufficient cold exposure duration in winter caused sufficient DNA demethylation in tender leaves in early spring and then accompanied the high expression of flowering gene PqFT in flowering stages and ginsenosides biosynthesis gene PqDDS in green berry stages successively, and finally, maximum ginsenosides accumulation occurred in the roots of American ginseng. Conclusion: We, therefore, hypothesized that cold-induced DNA methylation changes might regulate relative gene expression involving both plant development and plant secondary metabolites in such cold-dependent perennial plant species.
Synthesis of Ag/TiO_2 Core/Shell Nanoparticles with Antibacterial Properties
Yue Lin,Wang Qiqiang,Zhang Xiaoming,Wang Zhouping,Xia Wenshui,Dong Yuming 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.8
Monodispersed Ag/TiO_2 core/shell nanoparticles were synthesized in solution via colloid-seeded deposition process using Ag nanoparticles as colloid seeds and Ti(SO_4)_2 as Ti-source respectively. Silver nitrate was reduced to Ag nanoparticles with N_2H_4·H_2O in the presence of CTAB as stabilizing agent. The titania sols hydrolyzed by the Ti(SO_4)_2 solution deposited on the surface of Ag nanoparticles to form the Ag/TiO_2 core/shell nanoparticles. Inductively coupled plasma atomic emission spectrometry (ICP-AES) showed low amount of Ag ion leaching from the Ag/TiO_2 core/shell nanoparticles. The Ag/TiO_2 core/shell nanoparticles indicated excellent antibacterial effects against Escherichia coli and maintained long-term antibacterial property.
Yue Lin,Wang Jing,Pan Kang,Zhang Xiaoming,Wang Zhouping,Xia Wenshui 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
Making use of chitosan (CS) and ethylenediaminetetraacetic acid (EDTA) as a reaction system, CS-EDTA nanoparticles were synthesized through a facile counterion complex coacervation method. Ag^+ could enter porous CS nanoparticles synthesized with this method, allowing Ag nanoparticles within chitosan nanoparticles were synthesized by reducing silver nitrate with chitosan. Because of the noncovalent interaction between CS and EDTA, the EDTA could be easily removed via dialysis against water, and pure core/shell-type Ag/CS nanoparticles could be obtained. The nanoparticles showed higher antibacterial activity toward E. coli than the active precursor Ag nanoparticles and CS.
Lin, Yue,Jing, Wang,Kang, Pan,Xiaoming, Zhang,Zhouping, Wang,Wenshui, Xia Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.4
Making use of chitosan (CS) and ethylenediaminetetraacetic acid (EDTA) as a reaction system, CS-EDTA nanoparticles were synthesized through a facile counterion complex coacervation method. $Ag^+$ could enter porous CS nanoparticles synthesized with this method, allowing Ag nanoparticles within chitosan nanoparticles were synthesized by reducing silver nitrate with chitosan. Because of the noncovalent interaction between CS and EDTA, the EDTA could be easily removed via dialysis against water, and pure core/shell-type Ag/CS nanoparticles could be obtained. The nanoparticles showed higher antibacterial activity toward E. coli than the active precursor Ag nanoparticles and CS.