A novel hyper-cross-linked polymeric adsorbent with high microporous surface area and its adsorption to theophylline from aqueous solution
作者：
Xiao, Guqing* ;Wen, Ruiming;Wei, Dongmei;Wu, Dan
期刊：
Microporous and Mesoporous Materials ,2016年228:168-173 ISSN：1387-1811
通讯作者：
Xiao, Guqing
作者机构：
[Xiao, Guqing; Wen, Ruiming; Wei, Dongmei; Wu, Dan] Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Xiao, Guqing] H;Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Peoples R China.
关键词：
Hyper-cross-linked polymeric adsorbent;Microporous surface area;Adsorption;Theophylline
摘要：
According to the planar structure and the small molecular size of theophylline (TP), a novel hyper-cross-linked polymeric adsorbent with high microporous surface area (denoted GQ-06) was synthesized and its adsorption to TP was explored from aqueous solution. The results showed that GQ-06 possessed a high microporous surface area of 1223 m<sup>2</sup>/g and bimodal pore size distributions. The equilibrium adsorption capacity of TP on the five polymeric adsorbents followed an order as: XAD-4 <NDA-88 <H103 <NDA-150 <GQ-06, which was in agreement with the order of the microporous surface area. The adsorption as a function of the solution pH was accordant with the dissociation curve of TP from aqueous solution. The equilibrium adsorption capacity of TP on GQ-06 increased with increasing of the ionic strength due to the predominant contribution of the hydrophobic effect. The pseudo-first-order rate equation described the adsorption in two stages according to the bimodal pore size distributions. The adsorption isotherms were correlated to the Freundlich equation. The breakthrough capacity and the total capacity of TP on GQ-06 were up to 45.9 and 105.8 mg/mL respectively, and it could be regenerated by 4 BV of anhydrous ethanol. ©2016 Elsevier Inc. All rights reserved.
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英文
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Effect of purification pretreatment on the recovery of magnetite from waste ferrous sulfate
作者：
Yu, Wang;Peng, Ying-lin;Zheng, Ya-jie*
期刊：
矿物冶金与材料学报：英文版 ,2016年23(8):891-897 ISSN：1674-4799
通讯作者：
Zheng, Ya-jie
作者机构：
[Yu, Wang; Zheng, Ya-jie] Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China.;[Peng, Ying-lin] Hunan City Univ, Sch Chem & Environm Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Zheng, Ya-jie] C;Cent S Univ, Sch Met & Environm, Changsha 410083, Peoples R China.
关键词：
ferrous sulfate;titanium dioxide;purification;magnetite;magnetic separation
摘要：
The present study was conducted to elucidate the influence of impurities in waste ferrous sulfate on its recovery of magnetite. Ferrous sulfate solution was purified by the addition of NaOH solution to precipitate impurities, and magnetite was recovered from ferrous sulfate solution without and with purification pretreatment. Calcium hydroxide was added to the solution of ferrous sulfate as a precipitator. A mixed product of magnetite and gypsum was subsequently obtained by air oxidation and heating. Wet-milling was performed prior to magnetic separation to recover magnetite from the mixed products. The results show that with the purification pretreatment, the grade of iron in magnetite concentrate increased from 62.05% to 65.58% and the recovery rate of iron decreased from 85.35% to 80.35%. The purification pretreatment reduced the conglutination between magnetite and gypsum, which favors their subsequent magnetic separation. In summary, a higher-grade magnetite with a better crystallinity and a larger particle size of 2.35 μm was obtained with the purification pretreatment.
语种：
英文
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A red-emitting fluorescent probe for biothiols detection with a large Stokes shift
作者：
Qi, Fengpei;Liu, Xingjiang;Yang, Lei;Yang, Liu;Chen, Wenqiang;...
期刊：
Tetrahedron ,2016年72(44):6909-6913 ISSN：0040-4020
通讯作者：
Song, Xiangzhi
作者机构：
[Qi, Fengpei; Song, Xiangzhi; Yang, Lei; Liu, Xingjiang; Yang, Liu; Chen, Wenqiang] Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Qi, Fengpei] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.;[Song, Xiangzhi] Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.;[Song, Xiangzhi] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Liaoning, Peoples R China.
通讯机构：
[Song, Xiangzhi] C;[Song, Xiangzhi] D;Cent S Univ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;Cent S Univ, State Key Lab Powder Met, Changsha 410083, Hunan, Peoples R China.;Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Liaoning, Peoples R China.
关键词：
Biothiols;Colorimetric;Detection limit;Fluorescent probe;Selectivity
摘要：
A highly selective red-emitting fluorescent probe for biothiols detection was developed. The addition of biothiols to the solution of this probe, 1, resulted in a strong red fluorescence with an obvious color change from red to claybank. This colorimetric and fluorescent dual probe exhibited a low detection limit (15 nM) and a large Stokes shift (147 nm) in detecting biothiols. Importantly, the utility of this probe for sensing intracellular thiols was successfully demonstrated in living HNE-2 cells. (C) 2016 Published by Elsevier Ltd.
语种：
英文
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BiOBr/BiOI Photocatalyst Based on Fly Ash Cenospheres with Improved Photocatalytic Performance
作者：
Lin, Li* ;Huang, Manhong;Chen, Donghui*
期刊：
Molecules ,2016年21(5):666- ISSN：1420-3049
通讯作者：
Lin, Li;Chen, Donghui
作者机构：
[Lin, Li] Hunan City Univ, Sch Chem & Environm Engn, Yiyang 413000, Peoples R China.;[Chen, Donghui; Lin, L; Chen, DH; Huang, Manhong; Lin, Li] Donghua Univ, Sch Environm Sci & Engn, Shanghai 201620, Peoples R China.;[Chen, Donghui] Shanghai Inst Technol, Shanghai 200235, Peoples R China.
通讯机构：
[Lin, Li] H;[Lin, L; Chen, DH] D;[Chen, Donghui] S;Hunan City Univ, Sch Chem & Environm Engn, Yiyang 413000, Peoples R China.;Donghua Univ, Sch Environm Sci & Engn, Shanghai 201620, Peoples R China.
关键词：
BiOBr/BiOI;fly-ash cenospheres;photocatalytic activity;pH value
摘要：
A series of BiOBr/BiOI photocatalysts supported on fly-ash cenospheres (FACs) were successfully prepared via a facile one-pot alcoholysis method. The as-prepared samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectrometer (XPS) and UV-visible diffuse reflectance spectroscopy (DRS). The results indicate that pH value plays a critical role in BiOBr/BiOI loading. Based on the photodegradation tests under visible light irradiation (blue LED irradiation), the photocatalytic property of BiOBr/BiOI/FACs photocatalysts obtained under alkaline conditions is superior to that prepared under neutral or acidic conditions, and higher than those of BiOB/FACs and BiOI//FACs. The improved photocatalytic performance of BiOBr/BiOI/FACs can be attributed to more BiOBr/BiOI loaded on the surface of FACs and the efficient photogenerated electron-hole separation.
语种：
英文
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Radical Scavenging by Acetone: A New Perspective to Understand Laccase/ABTS Inactivation and to Recover Redox Mediator
作者：
Liu, Hao* ;Zhou, Pandeng;Wu, Xing;Sun, Jianliang;Chen, Shicheng
期刊：
Molecules ,2015年20(11):19907-19913 ISSN：1420-3049
通讯作者：
Liu, Hao
作者机构：
[Liu, Hao; Sun, Jianliang; Wu, Xing] S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China.;[Zhou, Pandeng] Hunan City Univ, Sch Chem & Environm Engn, Yiyang 413000, Peoples R China.;[Chen, Shicheng] Michigan State Univ, Dept Microbiol & Mol Genet, E Lansing, MI 48824 USA.
通讯机构：
[Liu, Hao] S;S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Guangdong, Peoples R China.
关键词：
laccase;ABTS;inhibition;radical scavenging;recovery
摘要：
The biosynthetic utilization of laccase/mediator system is problematic because the use of organic cosolvent causes significant inhibition of laccase activity. This work explored how the organic cosolvent impacts on the laccase catalytic capacity towards 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) in aqueous solution. Effects of acetone on the kinetic constants of laccase were determined and the results showed K<sub>m</sub> and V<sub>max</sub> varied exponentially with increasing acetone content. Acetone as well as some other cosolvents could transform ABTS radicals into its reductive form. The content of acetone in media significantly affected the radical scavenging rates. Up to 95% of the oxidized ABTS was successfully recovered in 80% (v/v) acetone in 60 min. This allows ABTS recycles at least six times with 70%–75% of active radicals recovered after each cycle. This solvent-based recovery strategy may help improve the economic feasibility of laccase/ABTS system in biosynthesis. View Full-Text
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英文
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Formulation of intumescent flame retardant coatings containing natural-based tea saponin
作者：
Qian, Wei;Li, Xiang-Zhou* ;Wu, Zhi-Ping;Liu, Yan-Xin;Fang, Cong-Cong;...
期刊：
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY ,2015年63(10):2782-2788 ISSN：0021-8561
通讯作者：
Li, Xiang-Zhou
作者机构：
[Li, Xiang-Zhou; Liu, Yan-Xin; Wu, Zhi-Ping; Qian, Wei] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Li, Xiang-Zhou] Forest Area South China, State Key Lab Ecol Appl Technol, Changsha 410004, Hunan, Peoples R China.;[Qian, Wei] Guangdong Vocat Coll Environm Protect Engn, Foshan 528216, Guangdong, Peoples R China.;[Liu, Yan-Xin] Changsha Univ Sci & Technol, Sch Chem & Bioengn, Changsha 410114, Hunan, Peoples R China.;[Fang, Cong-Cong] Cent South Univ Forestry & Technol, Business Sch, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Li, Xiang-Zhou] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
tea saponin;intumescent flame retardant coatings;formulation;flame retardancy;thermal analysis
摘要：
Natural product tea saponin (TS), extracted from the nutshell of camellia (Camellia oleifera Abel, Theaceae), was introduced into intumescent flame retardant formulations as blowing agent and carbon source. The formulations of the flame retardant system were optimized to get the optimum proportion of TS, and intumescent flame retardant coatings containing tea saponin (TS-IFRCs) were then prepared. It was found that TS can significantly affect the combustion behavior and the thermal stability of TS-IFRCs evaluated by cone calorimetry and simultaneous thermal analyzer, respectively. It was shown that TS, degraded to water vapor and carbon at high temperatures, can combine with other components to form a well-developed char layer. The char layer was supposed to inhibit erosion upon exposure to heat and oxygen and enhance the flame retardancy of TS-IFRCs. In addition, the smoke release of TS-IFRCs was also studied, which provided a low amount of smoke production.
语种：
英文
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Novel application of LiCoO_2 as a high-performance candidate material for supercapacitor
作者：
Xu, Yanan;Ding, Liangzhong* ;Zhong, Tongsheng;Han, Xiao;Jiao, Lifang;...
期刊：
能源化学(英文) ,2015年24(2):193-198 ISSN：2095-4956
通讯作者：
Ding, Liangzhong
作者机构：
[Xu, Yanan; Jiao, Lifang; Yuan, Huatang; Wang, Yijing] Nankai Univ, Tianjin Key Lab Met & Mol Mat Chem, Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Inst New Energy Mat Chem,Key Lab Adv Energy Mat C, Tianjin 300071, Peoples R China.;[Zhong, Tongsheng; Ding, Liangzhong] Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.;[Han, Xiao] Maple Leaf Int Sch Tianjin TEDA, Tianjin 300457, Peoples R China.
通讯机构：
[Ding, Liangzhong] H;Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
lithium cobalt oxide;hydrothermal reaction;supercapacitor;calcination
摘要：
Electrochemical performances of LiCoO2 as a candidate material for supercapacitor are systematically investigated. LiCoO2 nanomaterials are synthesized via hydrothermal reaction with consequent calcination process. And the particle size increases as the calcination temperature rises.LCO-650 sample with the largest particle size displays the maximum capacitances of 817.5 Fg-1with the most outstanding capacity retention rate of 96.8% after 2000 cycles. It is shown that large particle size is beneficial to the electrochemical and structural stability of Li CoO2 materials. We speculate that the micron-sized waste LiCoO2 materials have great potential for supercapacitor application. It may provide a novel recovered approach for spent LIBs and effectively relieve the burdens on the resource waste and environment pollution.
语种：
英文
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Silver nanoparticle gated, mesoporous silica coated gold nanorods (AuNR@MS@AgNPs): Low premature release and multifunctional cancer theranostic platform
作者：
Zhang, Zhehua;Liu, Changhui;Bai, Junhui;Wu, Cuichen;Xiao, Yue;...
期刊：
ACS Applied Materials & Interfaces ,2015年7(11):6211-6219 ISSN：1944-8244
通讯作者：
Zheng, Jing
作者机构：
[Liu, Changhui; Xiao, Yue; Bai, Junhui; Zheng, Jing; Yang, Ronghua; Li, Yinhui; Zhang, Zhehua; Tan, Weihong] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.;[Liu, Changhui] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Peoples R China.;[Yang, Ronghua] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Wu, Cuichen; Tan, Weihong] Univ Florida, Dept Chem, Ctr Res Bio Nano Interface, Gainesville, FL 32611 USA.;[Wu, Cuichen; Tan, Weihong] Univ Florida, Dept Physiol & Funct Genom, Shands Canc Ctr, Gainesville, FL 32611 USA.
通讯机构：
[Zheng, Jing] H;Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
关键词：
mesoporous silica nanoparticles;gold nanorods;silver nanoparticle;GSH;photothermal therapy;photodynamic therapy
摘要：
Multifunctional nanoparticles integrated with an imaging module and therapeutic drugs are promising candidates for future cancer diagnosis and therapy. Mesoporous silica coated gold nanorods (AuNR@MS) have emerged as a novel multifunctional cancer theranostic platform combining the large specific surface area of mesoporous silica, which guarantees a high drug payload, and the photothermal modality of AuNRs. However, premature release and side effects of exogenous stimulus still hinder the further application of AuNR@MS. To address these issues, herein, we proposed a glutathione (GSH)-responsive multifunctional AuNR@MS nanocarrier with in situ formed silver nanoparticles (AgNPs) as the capping agent. The inner AuNR core functions as a hyperthermia agent, while the outer mesoporous silica shell exhibits the potential to allow a high drug payload, thus posing itself as an effective drug carrier. With the incorporation of targeting aptamers, the constructed nanocarriers show drug release in accordance with an intracellular GSH level with maximum drug release into tumors and minimum systemic release in the blood. Meanwhile, the photothermal effect of the AuNRs upon application to near-infrared (NIR) light led to a rapid rise in the local temperature, resulting in an enhanced cell cytotoxicity. Such a versatile theranostic system as AuNR@MS@AgNPs is expected to have a wide biomedical application and may be particularly useful for cancer therapy. © 2015 American Chemical Society.
语种：
英文
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Electrochemical Detection of Dopamine in the Presence of Ascorbic Acid Using GS@Mn3O4/Nafion Film Modified Electrode at a Low Working Potential
作者：
He, Guowen* ;Wu, Dan;Xiao, Guqing
期刊：
International Journal of Electrochemical Science ,2015年10(12):10093-10103 ISSN：1452-3981
通讯作者：
He, Guowen
作者机构：
[Xiao, Guqing; He, Guowen; Wu, Dan] Hunan City Univ, Coll Chem & Enviromental Engn, Yiyang 413000, Peoples R China.;[Xiao, Guqing; He, Guowen; Wu, Dan] Hunan City Univ, Inst Polymer Mat & Engn, Yiyang 413000, Peoples R China.
通讯机构：
[He, Guowen] H;Hunan City Univ, Coll Chem & Enviromental Engn, Yiyang 413000, Peoples R China.
关键词：
Dopamine;Low working potential;[email protected] Mn 3 O 4
摘要：
Graphene sheets (GS)@manganic manganous oxide (Mn 3 O 4 ) nanocomposites were prepared via a simple solvothermal process. [email protected] 3 O 4 /nafion (Nf) film modified glassy carbon electrode (GCE) was fabricated and applied for the detection of dopamine (DA) without the interference of ascorbic acid (AA) at the low working potential. The prepared nanocomposites ([email protected] 3 O 4 ) were characterized by X-ray diffraction (XRD) and fourier transform infrared spectroscopy (FT-IR), and the morphology of different electrodes was characterized by scanning electron microscopy (SEM). The electrochemical properties of the modified electrode (GCE|[email protected] 3 O 4 /Nf) were investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and current-time method (i-t curve). Under the optimized experimental conditions, the i-t curve showed a linear dependence on DA concentrations ranging from 1.0×10 -6 to 1.3×10 -3 M (R=0.9985) with a detection limit of 8.0×10 -8 M (S/N=3). The proposed method was used to detect DA in real pharmaceutical samples using the standard addition method without additional sample pre-treatment with satisfactory results, which showed great promise for screen-determination of DA in real samples. © 2015 The Authors.
语种：
英文
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Flexibility Analysis of Bacillus thuringiensis Cry1Aa
作者：
Zhao Xin Min* ;Xia Li Qiu;Yang Xiao Ping;Peng Xiao Yun
期刊：
生物医学与环境科学：英文版 ,2015年28(9):634-641 ISSN：0895-3988
通讯作者：
Zhao Xin Min
作者机构：
[Zhao Xin Min; Yang Xiao Ping; Peng Xiao Yun] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.;[Zhao Xin Min; Xia Li Qiu] Hunan Normal Univ, Coll Life Sci, Key Lab Microbial Mol Biol Hunan Prov, Changsha 410081, Hunan, Peoples R China.;[Yang Xiao Ping] Univ Colorado Anschutz Med Campus, Sch Med, Div Med Oncol, Dept Med, Aurora, CO USA.
通讯机构：
[Zhao Xin Min] H;Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Flexibility;Cry1Aa;Bacillus thuringiensis;Constraint Network Analysis;NMSim
摘要：
Objective To investigate the flexibility and mobility of the Bacillus thuringiensis toxin Cry1 Aa. Methods The graph theory-based program Constraint Network Analysis and normal mode-based program NMsim were used to analyze the global and local flexibility indices as well as the fluctuation of individual residues in detail. Results The decrease in Cry1 Aa network rigidity with the increase of temperature was evident. Two phase transition points in which the Cry1 Aa structure lost rigidity during the thermal simulation were identified. Two rigid clusters were found in domains I and II. Weak spots were found in C-terminal domain III. Several flexible regions were found in all three domains; the largest residue fluctuation was present in the apical loop2 of domain II. Conclusion Although several flexible regions could be found in all the three domains, the most flexible regions were in the apical loops of domain II.
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英文
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Targeted Intracellular Controlled Drug Delivery and Tumor Therapy through in Situ Forming Ag Nanogates on Mesoporous Silica Nanocontainers
作者：
Liu, Changhui;Zheng, Jing;Deng, Li;Ma, Cheng;Li, Jishan;...
期刊：
ACS Applied Materials & Interfaces ,2015年7(22):11930-11938 ISSN：1944-8244
通讯作者：
Yang, Ronghua
作者机构：
[Deng, Li; Liu, Changhui; Yang, Sheng; Ma, Cheng; Zheng, Jing; Yang, Ronghua; Li, Yinhui; Li, Jishan] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.;[Liu, Changhui] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Peoples R China.;[Yang, Sheng; Yang, Ronghua] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Yang, Jinfeng; Wang, Jing] Cent S Univ, Xiangya Sch Med, Affiliated Canc Hosp, Changsha 410011, Hunan, Peoples R China.
通讯机构：
[Yang, Ronghua] H;Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
关键词：
drug delivery;mesoporous silica nanoparticle;DNA;silver sphere;glutathione
摘要：
Targeting nanocontainers to the pathological zone and controlling release of their cargoes, in particular delivery of anticancer drugs to specific tumor cells in a targeted and controlled manner, remain the key challenges in drug delivery. This paper reports the development of a traceable and tumor-targeted intracellular drug release nanocontainer. The nanocontainer is obtained by in situ growth of silver nanoparticles (AgNPs) on the surfaces of mesoporous silica nanospheres (MSNs) using a DNA-templated process. Additionally, drug release from the nanopores is achieved by selective glutathione (GSH)-triggered dismantle of the AgNPs, and the concurrent fluorescence change allows real-time monitoring of drug release efficacy and facile visualization of in vivo delivery events. After being functionalized with sgc8 aptamer on the outer shell of the AgNPs, the targeted nanocontainers are delivered into acute lymphoblastic leukemia cells by aptamer-mediated recognition and endocytosis. Moreover, the GSH-responsive process presents an improvement in the cell-specific drug release and chemotherapeutic inhibition of tumor growth. © 2015 American Chemical Society.
语种：
英文
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Study of the rice straw biodegradation in mixed culture of Trichoderma viride and Aspergillus niger by GC-MS and FTIR
作者：
Chen, Yaoning* ;Huang, Jingxia;Li, Yuanping;Zeng, Guangming;Zhang, Jiachao;...
期刊：
Environmental Science and Pollution Research ,2015年22(13):9807-9815 ISSN：0944-1344
通讯作者：
Chen, Yaoning
作者机构：
[Ma, Shuang; Chen, Yaoning; Huang, Aizhi; Huang, Jingxia; Zeng, Guangming; Zhang, Jie; Zhou, Wei; Xu, Wei; Li, Yuanping; Tan, Xuebin] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Ma, Shuang; Chen, Yaoning; Huang, Aizhi; Huang, Jingxia; Zeng, Guangming; Zhang, Jie; Zhou, Wei; Xu, Wei; Li, Yuanping; Tan, Xuebin] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Li, Yuanping] Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.;[Zhang, Jiachao] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Chen, Yaoning] H;Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Lignocellulose;Biodegradation;Mixed culture;Trichoderma viride;Aspergillus niger;GC-MS;FTIR
摘要：
This study was conducted to investigate the biodegradation ability of the mixed culture of Trichoderma viride and Aspergillus niger through the study of the organic matter extracted from rice straw and the lignocellulose structure by using gas chromatography–mass spectrometer (GC-MS) and Fourier transform infrared spectroscopy (FTIR). The results of the GC-MS showed that the mixed culture possessed shorter alkane (heptane) at the end of the incubation and more kinds of organic matter (except the alkanes, 29 kinds of organic matter were detected) than the pure cultures. It could be deduced that the organic matter could indicate the degradation degree of the lignocellulose to some extent. Moreover, pinene was detected in the mixed culture on days 5 and 10, which might represent the antagonistic relationship between T. viride and A. niger. The analysis of FTIR spectrums which indirectly verified the GC-MS results showed that the mixed culture possessed a better degradation of rice straw compared with the pure culture. Therefore, the methods used in this research could be considered as effective ones to investigate the lignocellulose degradation mechanism in mixed culture. © 2015, Springer-Verlag Berlin Heidelberg.
语种：
英文
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DNA-templated in situ growth of silver nanoparticles on mesoporous silica nanospheres for smart intracellular GSH-controlled release
作者：
Liu, Changhui;Qing, Zhihe;Zheng, Jing;Deng, Li;Ma, Cheng;...
期刊：
Chemical Communications ,2015年51(30):6544-6547 ISSN：1359-7345
通讯作者：
Yang, Ronghua
作者机构：
[Deng, Li; Liu, Changhui; Yang, Sheng; Ma, Cheng; Zheng, Jing; Yang, Ronghua; Li, Yinhui; Li, Jishan; Tan, Weihong] Hunan Univ, Collaborat Innovat Ctr Chem & Mol Med, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.;[Liu, Changhui] Hunan City Univ, Dept Chem & Environm Engn, Yiyang 413000, Peoples R China.;[Yang, Sheng; Yang, Ronghua; Qing, Zhihe] Changsha Univ Sci & Technol, Sch Chem & Biol Engn, Changsha 410004, Hunan, Peoples R China.;[Yang, Jinfeng; Wang, Jing] Cent S Univ, Affiliated Canc Hosp, Xiangya Sch Med, Changsha 410011, Hunan, Peoples R China.;[Tan, Weihong] Univ Florida, Dept Chem, Ctr Res Bio Nano Interface, Gainesville, FL 32611 USA.
通讯机构：
[Yang, Ronghua] H;Hunan Univ, Collaborat Innovat Ctr Chem & Mol Med, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
摘要：
In this work, we propose a method for constructing silver nanoparticles (AgNPs) on mesoporous silica nanospheres (MSNs) by a DNA-templated process. By in situ formation, the gatekeeper can be easily modulated to meet different degrees of glutathione (GSH) stimuli for location-specific drug release.
语种：
英文
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DMAc used as a reducer for preparation of spherical silver nanoparticles with high dispersion
作者：
He Guo-wen;Li Fen-fang* ;Wen Jie-bin
期刊：
中南大学学报(英文版) ,2015年22(2):445-449 ISSN：2095-2899
通讯作者：
Li Fen-fang
作者机构：
[He Guo-wen; Li Fen-fang] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.;[He Guo-wen; Wen Jie-bin] Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Peoples R China.;[Wen Jie-bin] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
通讯机构：
[Li Fen-fang] C;Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.
关键词：
N, N-dimethylacetamide (DMAc);sliver nanoparticles;polyvinyl pyrrolidone (PVP);preparation
摘要：
A silver nanoparticle（Ag NP） with good monodispersity was produced by a convenient method for reducing of Ag NO3 with N, N-dimethylacetamide in the presence of polyvinyl pyrrolidone（PVP） as the surface modification agent. The shape and size of the Ag NP with reaction time were taken as variables. The surface plasmon band transition was monitored with reaction mixture time at different temperatures. The Ag NP crystallinity increases with the reaction time, and the reduction efficiency is very low when Ag NP solution is dealt at room temperature even after two days, while it is greatly improved at 160 °C only for 25 min. Ag NP modified by the as-synthesized PVP has a face-centered cubic crystalline structure, in which Ag NP could develop into a spherical morphology with a very narrow size distribution of 2-11 nm. The preparation provides a new reducing agent to form Ag NP with simpler operation and shorter time.
语种：
英文
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基于纳米通道表面增强拉曼散射光谱分离检测组氨酸对映体的研究
作者：
Zhong Tong-Sheng;Yin Zhi-Fang;Liu Yue;Huang Shan-Sheng*
期刊：
分析化学 ,2015年43(11):1695-1700 ISSN：0253-3820
通讯作者：
Huang Shan-Sheng
作者机构：
[Zhong Tong-Sheng; Huang Shan-Sheng; Yin Zhi-Fang] Hunan City Coll, Dept Chem & Environm Engn, Yiyang 413000, Peoples R China.;[Liu Yue; Huang Shan-Sheng] Shanghai Normal Univ, Life & Environm Sci Coll, Shanghai 200234, Peoples R China.
通讯机构：
[Huang Shan-Sheng] H;Hunan City Coll, Dept Chem & Environm Engn, Yiyang 413000, Peoples R China.
关键词：
金纳米通道;手性分离;表面增强拉曼光谱;组氨酸
摘要：
以Al_2 O_3纳米通道膜为基体制备金纳米通道,以场发射扫描电镜、循环伏安、交流阻抗等方法对金纳米通道进行表征。采用EDC-NHS的交联反应,将壳聚糖自组装至金纳米通道孔壁上,形成表面具有手性位点选择性的功能化纳米通道膜,利用纳米通道优异的分离能力手性分离D-,L-组氨酸。考察了纳米通道孔径和溶液的pH值对分离效果的影响。采用银溶胶作为表面增强拉曼(SERS)测试的基底,增强对D-,L-组氨酸的SERS效应,提高检测该物质的选择性和灵敏度。分别在1000和1590 cm~(-1)处测定L-组氨酸和D-组氨酸。在含200 μL组氨酸、100 μL银溶胶和100 μL 80 mmol/ L NaCl溶液(pH=7.59)中,D-组氨酸和L-组氨酸可得到较好分离,分离度达到4.91。
语种：
中文
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Synthesis and microstructure of a novel graft copolymer from poly(vinylidene fluoride-chlorotrifluoroethylene-trifluoroethylene)
作者：
He, Guowen;Li, Fenfang;Zhong, Tongsheng;Hao, Zeming;Li, Hengfeng*
期刊：
DESIGNED MONOMERS AND POLYMERS ,2015年18(1):19-26 ISSN：1385-772X
通讯作者：
Li, Hengfeng
作者机构：
[Li, Fenfang; He, Guowen] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.;[Zhong, Tongsheng; He, Guowen] Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Peoples R China.;[Li, Hengfeng; He, Guowen] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.;[Hao, Zeming] Sany Heavy Ind Concrete Pump Inst, Changsha 410100, Hunan, Peoples R China.
通讯机构：
[Li, Hengfeng] C;Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China.
关键词：
atom transfer radical polymerization (ATRP);graft copolymer;microstructure;properties
摘要：
A novel graft copolymer of poly(vinylidene fluoride-chlorotrifluoroethylene-trifluoroethylene)-graft-poly(6-((4-cyano-4-biphenyl)oxy) hexyl methacrylate) (P(VDF-CTFE-TrFE)-graft-PCBHM) using P(VDF-CTFE-TrFE) as the initiator was successfully synthesized via atom transfer radical polymerization. It was found that the crystallinity of resultant graft copolymer increased slightly after grafting from the P(VDF-CTFE-TrFE), and the crystalline regions in the graft copolymer contained more (β phase which has all-trans chain conformation) trans chain conformation. Upon the introduction of PCBHM side chains, the thermal stability of the graft copolymer was lower than that of pristine terpolymer, but the storage modulus was enhanced significantly, which is beneficial for breakdown field-strength enhancement, and dielectric properties simultaneously decreased. © 2014 Taylor & Francis.
语种：
英文
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A Sensitive and Selective Amperometric Immunosensor for Chloramphenicol Detection Based on Magnetic Nanocomposites Modify Screen-Printed Carbon Electrode as a Disposable Platform
作者：
He, Guowen* ;Yang, Xin;Hu, Yongjun;Hu, Yangjian;Zhang, Fei
期刊：
International Journal of Electrochemical Science ,2014年9(12):6962-6974 ISSN：1452-3981
通讯作者：
He, Guowen
作者机构：
[Hu, Yongjun; He, Guowen] Hunan City Univ, Coll Chem & Enviromental Engn, Yiyang 413000, Peoples R China.;[Yang, Xin; Zhang, Fei; Hu, Yangjian] Huaihua Coll, Dept Chem & Chem Engn, Huaihua 418008, Peoples R China.;[Yang, Xin; Hu, Yangjian] Huaihua Coll, Huaihua Key Lab Funct Inorgan & Polymer Mat, Huaihua 418008, Peoples R China.;[Yang, Xin] Huaihua Coll, Key Lab Res & Utilizat Ethnomed Plant Resources H, Huaihua 418008, Peoples R China.
通讯机构：
[He, Guowen] H;Hunan City Univ, Coll Chem & Enviromental Engn, Yiyang 413000, Peoples R China.
关键词：
Chloramphenicol;Competitive immunoassay mode;Magnetic nanocomposites;Screen-printed carbon electrode
摘要：
A sensitive and selective amperometric immunosensor for chloramphenicol (CAP, IUPAC name: 2, 2-Dichloro-N-[2-hydroxy-1-(hydroxymethyl)-2-(4-nitrophenyl) ethyl] acetamide) detection based on magnetic nanocomposites modify screen-printed carbon electrode (SPCE) as a disposable platform was fabricated. Graphene sheets (GS)-Nafion (Nf) dispersed solution was first dropped on the SPCE and then Fe3O4-Au nanoparticles (GoldMag particles, GMP) coated bovine serum albumin-CAP (BSA-CAP) conjugates was absorbed on it with the aid of external magnetic field. X-ray powder diffractometer (XRD), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were employed to characterize the synthesized GS and the construction processes of the modified electrode. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) were used to study its electrochemical properties. The content of CAP was determined with a competitive immunoassay mode. When different concentration of CAP and 1.0 μg/mL anti-CAP were added to the phosphate buffer solution (PBS) containing 2.0 mmol/L K3[Fe(CN)6], the increase ratio of the DPV current (CI%) was proportional to the concentration of CAP over the range from 2.0 ng/mL to 200.0 ng/mL after incubation for 5.0 min at 25 °C. The detection limit was 0.82 ng/mL (S/N=3). The immunosensor was employed to determine CAP in milk samples and the results were consistent with high-performance liquid chromatography (HPLC) method. The proposed amperometric immunosensor is sensitive, selective, rapid, magnetic field controllable, low sample consumable and disposable. Results obtained in this study demonstrate that the immunosensor was suitable for determining trace CAP in real samples. © 2014 The Authors.
语种：
英文
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Effects of the steric hindrance of micropores in the hyper-cross-linked polymeric adsorbent on the adsorption of p-nitroaniline in aqueous solution
作者：
Xiao, Guqing* ;Wen, Ruimin;Wei, Dongmei;Wu, Dan
期刊：
Journal of Hazardous Materials ,2014年280:97-103 ISSN：0304-3894
通讯作者：
Xiao, Guqing
作者机构：
[Wen, Ruimin; Xiao, Guqing; Wei, Dongmei; Wu, Dan] Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Peoples R China.
通讯机构：
[Xiao, Guqing] H;Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Peoples R China.
关键词：
Adsorption;Hyper-cross-linked polymeric adsorbent;Micropore;Steric hindrance;p-Nitroaniline
摘要：
A hyper-cross-linked polymeric adsorbent with "CH<inf>2</inf>phenolCH<inf>2</inf>" as the cross-linked bridge (denoted GQ-05), and another hyper-cross-linked polymeric adsorbent with "CH<inf>2</inf>p-cresolCH<inf>2</inf>" as the cross-linked bridge (denoted GQ-03) were synthesized to reveal the effect of the steric hindrance of micropores in the hyper-cross-linked polymeric adsorbent on adsorption capacity and adsorption rate of p-nitroaniline (PNA) from aqueous solution. The results of adsorption kinetics indicated the order of the adsorption rate GQ-05>GQ-03. The pseudo-first-order rate equation could describe the entire adsorption process of PNA onto GQ-05 while the equation characterized the adsorption process of GQ-03 in two stages. The order of the adsorption capacity GQ-05>GQ-03 was demonstrated by thermodynamic analysis and dynamic adsorption. The steric hindrance of micropores in the hyper-cross-linked polymeric adsorbent was a crucial factor for the order of the adsorption capacity and adsorption rate. ©2014 Elsevier B.V.
语种：
英文
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Highly enantioselective construction of spirocyclopentaneoxindoles containing four consecutive stereocenters through an organocatalytic iminium-enamine cascade reaction
作者：
Ding, Liang-Zhong* ;Zhong, Tong-Sheng;Wu, Hao;Wang, Yong-Mei
期刊：
European Journal of Organic Chemistry ,2014年2014(24):5139-5143 ISSN：1434-193X
通讯作者：
Ding, Liang-Zhong
作者机构：
[Zhong, Tong-Sheng; Ding, Liang-Zhong] Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.;[Wu, Hao; Wang, Yong-Mei] Nankai Univ, Dept Chem, State Key Lab Elementoorgan Chem, Tianjin 300071, Peoples R China.
通讯机构：
[Ding, Liang-Zhong] H;Hunan City Univ, Coll Chem & Environm Engn, Yiyang 413000, Hunan, Peoples R China.
关键词：
Organocatalysis;Asymmetric synthesis;Spiro compounds;Domino reactions;Michael addition
摘要：
Spirocyclopentaneoxindole derivatives containing four consecutive stereocenters, including a spiro quaternary center, were constructed by an organocatalytic iminium-enamine cascade sequence in good yields (up to 86 %) with excellent enantiomeric (up to >99 % ee) and diastereomeric purities (up to >99:1 dr). This highly efficient procedure will allow diversity-oriented syntheses of this intriguing class of compounds with potential biological activities. Copyright © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
语种：
英文
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Synthesis and Crystal Structure of Aromatic Hydrazone Compounds Containing Pyrazole
作者：
Ren, Tiegang;Liu, Shuyun;Li, Yongzhe;Li, Guihui* ;Wang, Jie
期刊：
Journal of Chemical Crystallography ,2014年44(7):346-351 ISSN：1074-1542
通讯作者：
Li, Guihui
作者机构：
[Ren, Tiegang; Li, Yongzhe; Wang, Jie] Henan Univ, Fine Chem & Engn Res Inst, Coll Chem & Chem Engn, Kaifeng 475004, Peoples R China.;[Liu, Shuyun] Hunan City Univ, Yiyang 413000, Peoples R China.;[Li, Guihui] Henan Univ, Key Lab, Minist Educ Special Funct Mat, Kaifeng 475004, Peoples R China.
通讯机构：
[Li, Guihui] H;Henan Univ, Key Lab, Minist Educ Special Funct Mat, Kaifeng 475004, Peoples R China.
关键词：
Aromatic hydrazone;Pyrazole;Synthesis;Crystal structure;Characterization
摘要：
Two novel aromatic hydrazone compounds containing pyrazole group were synthesized with 1-phenylpyrazole-4-carbaldehyde and benzene hydrazine (or p-tolylhydrazine hydrochloride) as the starting materials. As-synthesized aromatic hydrazone compounds were characterized by means of 1H NMR, FT-IR, Ms and single-crystal X-ray diffraction. Results shown that two aromatic hydrazone compounds crystallizes in the monoclinic system of space group P21/n for A and Pc for B respectively. Graphical Abstract: [Figure not available: see fulltext.] © 2014 Springer Science+Business Media New York.
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英文
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