1
|
Xu D, Zhang G, Ni X, Wang B, Sun H, Yu Y, Mosa AA, Yin X. Effect of different aging treatments on the transport of nano-biochar in saturated porous media. Chemosphere 2023; 323:138272. [PMID: 36863628 DOI: 10.1016/j.chemosphere.2023.138272] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Revised: 02/23/2023] [Accepted: 02/27/2023] [Indexed: 06/18/2023]
Abstract
Widely used for soil amendment, carbon sequestration, and remediation of contaminated soils, biochars (BCs) inevitably produce a large number of nanoparticles with relatively high mobility. Geochemical aging alters chemical structure of these nanoparticles and thus affect their colloidal aggregation and transport behavior. In this study, the transport of ramie derived nano-BCs (after ball-milling) was investigated by different aging treatments (i.e., photo (PBC) and chemical aging (NBC)) as well as the managing BC under different physicochemical factors (i.e., flow rates, ionic strengths (IS), pH, and coexisting cations). Consequences of the column experiments indicated aging promoted the mobility of the nano-BCs. Compared to the nonaging BC, consequences of spectroscopic analysis demonstrated the aging BCs exhibited a number of tiny corrosion pores. Both of these aging treatments contribute to a more negative zeta potential and a higher dispersion stability of the nano-BCs, which is caused by the abundance of O-functional groups. Also the specific surface area and mesoporous volume of both aging BCs increased significantly, with the increase being more pronounced for NBC. The breakthrough curves (BTCs) obtained for the three nano-BCs were modelled by the advection-dispersion equation (ADE), which included first-order deposition and release terms. The ADE revealed high mobility of aging BCs, which meant their retention in saturated porous media was reduced. This work contributes to a comprehensive understanding of the transport of aging nano-BCs in the environment.
Collapse
Affiliation(s)
- Duo Xu
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, 712100, PR China
| | - Guangcai Zhang
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, 712100, PR China
| | - Xue Ni
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, 712100, PR China; Administrative Committee of Shizuishan High Tech Industrial Development Zone, Shizuishan, Gansu, 753000, PR China
| | - Binying Wang
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, 712100, PR China
| | - Huimin Sun
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling, Shaanxi, 712100, PR China
| | - Yingcui Yu
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, 712100, PR China
| | - Ahmed Ali Mosa
- Soils Department, Faculty of Agriculture, Mansoura University, 35516, Mansoura, Egypt
| | - Xianqiang Yin
- College of Natural Resources and Environment, Northwest A & F University, Yangling, Shaanxi, 712100, PR China; Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China, Ministry of Agriculture and Rural Affairs, Yangling, Shaanxi, 712100, PR China.
| |
Collapse
|
2
|
de Paiva PP, Nunes JHB, Nonato FR, Ruiz ALTG, Zafred RRT, Sousa IMO, Okubo MY, Kawano DF, Monteiro PA, Foglio MA, Carvalho JE. In Silico, In Vitro, and In Vivo Antitumor and Anti-Inflammatory Evaluation of a Standardized Alkaloid-Enriched Fraction Obtained from Boehmeria caudata Sw. Aerial Parts. Molecules 2020; 25:molecules25174018. [PMID: 32899132 PMCID: PMC7504783 DOI: 10.3390/molecules25174018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 08/28/2020] [Accepted: 09/01/2020] [Indexed: 12/24/2022] Open
Abstract
In the context of the cancer-inflammation relationship and the use of natural products as potential antitumor and anti-inflammatory agents, the alkaloid-enriched fraction of Boehmeriacaudata (BcAEF) aerial parts was evaluated. In vitro antiproliferative studies with human tumor cell lines showed high activity at low concentrations. Further investigation on NCI-H460 cells showed an irreversible effect on cell proliferation, with cell cycle arrest at G2/M phase and programmed cell death induction. Molecular docking studies of four alkaloids identified in BcAEF with colchicine’s binding site on β-tubulin were performed, suggesting (−)-C (15R)-hydroxycryptopleurine as the main inductor of the observed mitotic death. In vivo studies showed that BcAEF was able to reduce Ehrlich tumor volume progression by 30 to 40%. Checking myeloperoxidase activity, BcAEF reduced neutrophils migration towards the tumor. The in vivo anti-inflammatory activity was evaluated by chemically induced edema models. In croton oil-induced ear edema and carrageenan (CG)-induced paw edema models, BcAEF reduced edema around 70 to 80% together with inhibition of activation and/or migration of neutrophils to the inflammatory area. All together the results presented herein show BcAEF as a potent antitumor agent combining antiproliferative and anti-inflammatory properties, which could be further explored in (pre)clinical studies.
Collapse
Affiliation(s)
- Paula P. de Paiva
- Institute of Biology, University of Campinas-UNICAMP, Campinas-SP 13083-862, Brazil; (R.R.T.Z.); (P.A.M.); (J.E.C.)
- Chemical, Biological and Agricultural Pluridisciplinary Research Center (CPQBA), University of Campinas-UNICAMP, Paulínia-SP 13148-218, Brazil; (J.H.B.N.); (F.R.N.); (A.L.T.G.R.); (I.M.O.S.); (M.Y.O.)
- Faculty of Pharmaceutical Sciences, University of Campinas-UNICAMP, Campinas-SP 13083-871, Brazil; (D.F.K.); (M.A.F.)
- Correspondence: ; Tel.: +55-19-3521-7715
| | - Julia H. B. Nunes
- Chemical, Biological and Agricultural Pluridisciplinary Research Center (CPQBA), University of Campinas-UNICAMP, Paulínia-SP 13148-218, Brazil; (J.H.B.N.); (F.R.N.); (A.L.T.G.R.); (I.M.O.S.); (M.Y.O.)
- Institute of Chemistry, University of Campinas-UNICAMP, Campinas-SP 13083-970, Brazil
| | - Fabiana R. Nonato
- Chemical, Biological and Agricultural Pluridisciplinary Research Center (CPQBA), University of Campinas-UNICAMP, Paulínia-SP 13148-218, Brazil; (J.H.B.N.); (F.R.N.); (A.L.T.G.R.); (I.M.O.S.); (M.Y.O.)
| | - Ana L. T. G. Ruiz
- Chemical, Biological and Agricultural Pluridisciplinary Research Center (CPQBA), University of Campinas-UNICAMP, Paulínia-SP 13148-218, Brazil; (J.H.B.N.); (F.R.N.); (A.L.T.G.R.); (I.M.O.S.); (M.Y.O.)
- Faculty of Pharmaceutical Sciences, University of Campinas-UNICAMP, Campinas-SP 13083-871, Brazil; (D.F.K.); (M.A.F.)
| | - Rafael R. T. Zafred
- Institute of Biology, University of Campinas-UNICAMP, Campinas-SP 13083-862, Brazil; (R.R.T.Z.); (P.A.M.); (J.E.C.)
- Chemical, Biological and Agricultural Pluridisciplinary Research Center (CPQBA), University of Campinas-UNICAMP, Paulínia-SP 13148-218, Brazil; (J.H.B.N.); (F.R.N.); (A.L.T.G.R.); (I.M.O.S.); (M.Y.O.)
| | - Ilza M. O. Sousa
- Chemical, Biological and Agricultural Pluridisciplinary Research Center (CPQBA), University of Campinas-UNICAMP, Paulínia-SP 13148-218, Brazil; (J.H.B.N.); (F.R.N.); (A.L.T.G.R.); (I.M.O.S.); (M.Y.O.)
- Faculty of Pharmaceutical Sciences, University of Campinas-UNICAMP, Campinas-SP 13083-871, Brazil; (D.F.K.); (M.A.F.)
| | - Márcia Y. Okubo
- Chemical, Biological and Agricultural Pluridisciplinary Research Center (CPQBA), University of Campinas-UNICAMP, Paulínia-SP 13148-218, Brazil; (J.H.B.N.); (F.R.N.); (A.L.T.G.R.); (I.M.O.S.); (M.Y.O.)
- Piracicaba Dental School, University of Campinas, UNICAMP, Piracicaba-SP 13414-903, Brazil
| | - Daniel F. Kawano
- Faculty of Pharmaceutical Sciences, University of Campinas-UNICAMP, Campinas-SP 13083-871, Brazil; (D.F.K.); (M.A.F.)
| | - Paula A. Monteiro
- Institute of Biology, University of Campinas-UNICAMP, Campinas-SP 13083-862, Brazil; (R.R.T.Z.); (P.A.M.); (J.E.C.)
- Chemical, Biological and Agricultural Pluridisciplinary Research Center (CPQBA), University of Campinas-UNICAMP, Paulínia-SP 13148-218, Brazil; (J.H.B.N.); (F.R.N.); (A.L.T.G.R.); (I.M.O.S.); (M.Y.O.)
| | - Mary A. Foglio
- Faculty of Pharmaceutical Sciences, University of Campinas-UNICAMP, Campinas-SP 13083-871, Brazil; (D.F.K.); (M.A.F.)
| | - João E. Carvalho
- Institute of Biology, University of Campinas-UNICAMP, Campinas-SP 13083-862, Brazil; (R.R.T.Z.); (P.A.M.); (J.E.C.)
- Faculty of Pharmaceutical Sciences, University of Campinas-UNICAMP, Campinas-SP 13083-871, Brazil; (D.F.K.); (M.A.F.)
| |
Collapse
|
3
|
Wang WH, Luo XG, Liu L, Zhang Y, Zhao HZ. Ramie (Boehmeria nivea)'s uranium bioconcentration and tolerance attributes. J Environ Radioact 2018; 184-185:152-157. [PMID: 29395432 DOI: 10.1016/j.jenvrad.2018.01.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Revised: 01/06/2018] [Accepted: 01/20/2018] [Indexed: 06/07/2023]
Abstract
The authors sampled and analyzed 15 species of dominant wild plants in Huanan uranium tailings pond in China, whose tailings' uranium contents were 3.21-120.52 μg/g. Among the 15 species of wild plants, ramie (Boehmeria nivea) had the strongest uranium bioconcentration and transfer capacities. In order to study the uranium bioconcentration and tolerance attributes of ramie in detail, and provide a reference for the screening remediation plants to phytoremedy on a large scale in uranium tailings pond, a ramie cultivar Xiangzhu No. 7 pot experiment was carried out. We found that both wild ramie and Xiangzhu No. 7 could bioconcentrate uranium, but there were two differences. One was wild ramie's shoots bioconcentrated uranium up to 20 μg/g (which can be regarded as the critical content value of the shoot of uranium hyperaccumulator) even the soil uranium content was as low as 5.874 μg/g while Xiangzhu No. 7's shoots could reach 20 μg/g only when the uranium treatment concentrations were 275 μg/g or more; the other was that all the transfer factors of 3 wild samples were >1, and the transfer factors of 27 out of 28 pot experiment samples were <1. Probably wild ramie was a uranium hyperaccumulator. Xiangzhu No. 7 satisfied the needs of uranium hyperaccumulator on accumulation capability, tolerance capability, bioconcentration factor, but not transfer capability, so Xiangzhu No. 7 was not a uranium hyperaccumulator. We analyzed the possible reasons why there were differences in the uranium bioconcentration and transfer attributes between wild ramie and Xiangzhu No. 7., and proposed the direction for further research. In our opinion, both the plants which bioconcentrate contaminants in the shoots and roots can act as phytoextractors. Although Xiangzhu No. 7's biomass and accumulation of uranium were concentrated on the roots, the roots were small in volume and easy to harvest. And Xiangzhu No. 7's cultivating skills and protection measures had been developed very well. Xiangzhu No. 7's whole bioconcentration factors and the roots' bioconcentration factors, which were 1.200-1.834 and 1.460-2.341, respectively, increased with the increases of uranium contents of pot soil when the soil's uranium contents are 25-175 μg/g, so it can act as a potential phytoextractor when Huanan uranium tailings pond is phytoremediated.
Collapse
Affiliation(s)
- Wei-Hong Wang
- College of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Xue-Gang Luo
- Engineering Research Center of Biomass Materials, Ministry of Education, Mianyang, 621010, China.
| | - Lai Liu
- College of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Yan Zhang
- College of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China
| | - Hao-Zhou Zhao
- College of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China
| |
Collapse
|
4
|
Jiang L, Liu S, Liu Y, Zeng G, Guo Y, Yin Y, Cai X, Zhou L, Tan X, Huang X. Enhanced adsorption of hexavalent chromium by a biochar derived from ramie biomass (Boehmeria nivea (L.) Gaud.) modified with β-cyclodextrin/poly(L-glutamic acid). Environ Sci Pollut Res Int 2017; 24:23528-23537. [PMID: 28852975 DOI: 10.1007/s11356-017-9833-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 07/25/2017] [Indexed: 06/07/2023]
Abstract
This paper explored biochar modification to enhance biochar's ability to adsorb hexavalent chromium from aqueous solution. The ramie stem biomass was pyrolyzed and then treated by β-cyclodextrin/poly(L-glutamic acid) which contained plentiful functional groups. The pristine and modified biochar were characterized by FTIR, X-ray photoelectron spectroscopy, specific surface area, and zeta potential measurement. Results indicated that the β-cyclodextrin/poly(L-glutamic acid) was successfully bound to the biochar surface. Batch experiments were conducted to investigate the kinetics, isotherm, thermodynamics, and adsorption/desorption of Cr(VI). Adsorption capacities of CGA-biochar were significantly higher than that of the untreated biochar, and its maximum adsorption capacity could reach up to 197.21 mg/g at pH 2.0. Results also illustrated that sorption performance depended on initial solution pH; in addition, acidic condition was beneficial to the Cr(VI) uptake. Furthermore, the Cr(VI) uptake was significantly affected by the ion strength and cation species. This study demonstrated that CGA-biochar could be a potential adsorbent for Cr(VI) pollution control.
Collapse
Affiliation(s)
- Luhua Jiang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Shaobo Liu
- School of Metallurgy and Environment, Central South University, Changsha, 410083, People's Republic of China.
| | - Yunguo Liu
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China.
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China.
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Yiming Guo
- School of Economics and Management, Shanghai Maritime University, 1550 Haigang Ave., Shanghai, 201306, People's Republic of China
| | - Yicheng Yin
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Xiaoxi Cai
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Lu Zhou
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Xiaofei Tan
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| | - Xixian Huang
- College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China
- Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha, 410082, People's Republic of China
| |
Collapse
|
5
|
Zhou Z, Liu Y, Chang Z, Wang H, Leier A, Marquez-Lago TT, Ma Y, Li J, Song J. Structure-based engineering of a pectate lyase with improved specific activity for ramie degumming. Appl Microbiol Biotechnol 2016; 101:2919-2929. [PMID: 28028551 DOI: 10.1007/s00253-016-7994-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 10/26/2016] [Accepted: 11/05/2016] [Indexed: 11/27/2022]
Abstract
Biotechnological applications of microbial pectate lyases (Pels) in plant fiber processing are promising, eco-friendly substitutes for conventional chemical degumming processes. However, to potentiate the enzymes' use for industrial applications, resolving the molecular structure to elucidate catalytic mechanisms becomes necessary. In this manuscript, we report the high resolution (1.45 Å) crystal structure of pectate lyase (pelN) from Paenibacillus sp. 0602 in apo form. Through sequence alignment and structural superposition with other members of the polysaccharide lyase (PL) family 1 (PL1), we determined that pelN shares the characteristic right-handed β-helix and is structurally similar to other members of the PL1 family, while exhibiting key differences in terms of catalytic and substrate binding residues. Then, based on information from structure alignments with other PLs, we engineered a novel pelN. Our rational design yielded a pelN mutant with a temperature for enzymatic activity optimally shifted from 67.5 to 60 °C. Most importantly, this pelN mutant displayed both higher specific activity and ramie fiber degumming ability when compared with the wild-type enzyme. Altogether, our rational design method shows great potential for industrial applications. Moreover, we expect the reported high-resolution crystal structure to provide a solid foundation for future rational, structure-based engineering of genetically enhanced pelNs.
Collapse
Affiliation(s)
- Zhanping Zhou
- National Engineering Laboratory for Industrial Enzymes and Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Yang Liu
- National Engineering Laboratory for Industrial Enzymes and Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Zhenying Chang
- National Engineering Laboratory for Industrial Enzymes and Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Huilin Wang
- Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, China
| | - André Leier
- Isaac Newton Institute for Mathematical Sciences, University of Cambridge, Cambridge, UK
| | - Tatiana T Marquez-Lago
- Isaac Newton Institute for Mathematical Sciences, University of Cambridge, Cambridge, UK
| | - Yanhe Ma
- National Engineering Laboratory for Industrial Enzymes and Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Jian Li
- Infection and Immunity Program, Biomedicine Discovery Institute and Department of Microbiology, Monash University, Melbourne, VIC, 3800, Australia
| | - Jiangning Song
- National Engineering Laboratory for Industrial Enzymes and Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China.
- Infection and Immunity Program, Biomedicine Discovery Institute and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC, 3800, Australia.
- Monash Centre for Data Science, Faculty of Information Technology, Monash University, Melbourne, VIC, 3800, Australia.
| |
Collapse
|
6
|
Tan XF, Liu YG, Gu YL, Liu SB, Zeng GM, Cai X, Hu XJ, Wang H, Liu SM, Jiang LH. Biochar pyrolyzed from MgAl-layered double hydroxides pre-coated ramie biomass (Boehmeria nivea (L.) Gaud.): Characterization and application for crystal violet removal. J Environ Manage 2016; 184:85-93. [PMID: 27591848 DOI: 10.1016/j.jenvman.2016.08.070] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Revised: 07/19/2016] [Accepted: 08/05/2016] [Indexed: 06/06/2023]
Abstract
A novel biochar/MgAl-layered double hydroxides composite (CB-LDH) was prepared for the removal of crystal violet from aqueous solution by pyrolyzing MgAl-LDH pre-coated ramie stem (Boehmeria nivea (L.) Gaud.). Pyrolysis played dual role for both converting biomass into biochar and calcining MgAl-LDH during the pyrolysis process. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray analysis (EDS), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) and zeta potential analysis were used to characterize the CB-LDH. The results of characterization suggested that the calcined LDH was successfully synthesized and coated on biochar. The resulted CB-LDH had higher total pore volume and more functional groups than the pristine biochar. Adsorption experimental data fitted well with the pseudo-second order kinetics model and the Freundlich isotherm model. The rate-controlled step was controlled by film-diffusion initially and then followed by intra-particle diffusion. Thermodynamic analysis showed that the adsorption of crystal violet was a spontaneous and endothermic process. The higher pH and temperature of the solution enhanced the adsorption performance. CB-LDH could also have excellent ability for the removal of crystal violet from the actual industrial wastewater and groundwater with high ionic strength. LDH adsorption, electrostatic attraction, pore-filling, π-π interaction and hydrogen bond might be the main mechanisms for crystal violet adsorption on CB-LDH. The results of this study indicated that CB-LDH is a sustainable and green adsorbent with high performance for crystal violet contaminated wastewater treatment and groundwater remediation.
Collapse
Affiliation(s)
- Xiao-Fei Tan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yun-Guo Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Yan-Ling Gu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Shao-Bo Liu
- School of Metallurgy and Environment, Central South University, Changsha 410083, PR China; School of Architecture and Art, Central South University, Changsha 410083, PR China
| | - Guang-Ming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xiaoxi Cai
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xin-Jiang Hu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China; College of Environmental Science and Engineering Research, Central South University of Forestry and Technology, Changsha 410004, PR China
| | - Hui Wang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Si-Mian Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Lu-Hua Jiang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| |
Collapse
|
7
|
Zhou L, Liu Y, Liu S, Yin Y, Zeng G, Tan X, Hu X, Hu X, Jiang L, Ding Y, Liu S, Huang X. Investigation of the adsorption-reduction mechanisms of hexavalent chromium by ramie biochars of different pyrolytic temperatures. Bioresour Technol 2016; 218:351-9. [PMID: 27376834 DOI: 10.1016/j.biortech.2016.06.102] [Citation(s) in RCA: 174] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2016] [Revised: 06/18/2016] [Accepted: 06/21/2016] [Indexed: 05/20/2023]
Abstract
To investigate the relationship between Cr(VI) adsorption mechanisms and physio-chemical properties of biochar, ramie residues were oxygen-limited pyrolyzed under temperature varying from 300 to 600°C. Batch adsorption experiments indicated that higher pyrolysis temperature limits Cr(VI) sorption in terms of capacity and affinity due to a higher aromatic structure and fewer polar functional groups in biochar. Both electrostatic (physical) and ionic (chemical) interactions were involved in the Cr(VI) removal. For low-temperature biochar, the simple physical adsorption was limited and the significant improvement in Cr(VI) sorption was attributed to abundant carboxyl and hydroxyl groups. The adsorption-reduction mechanisms could be concluded that Cr(VI) ions were electrostatically attracted by the positively charged biochar surface and reduced to Cr(III), and then the converted Cr(III) was retained or discharged into the solution. The study demonstrates ramie residues can be converted into biochar as a low-cost and effective sorbent for Cr(VI) removal.
Collapse
Affiliation(s)
- Lu Zhou
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yunguo Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China.
| | - Shaobo Liu
- College of Architecture and Art, Central South University, Changsha 410082, PR China
| | - Yicheng Yin
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Guangming Zeng
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xiaofei Tan
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xi Hu
- College of Environmental Science and Engineering Research, Central South University of Forestry and Technology, Changsha 410004, PR China
| | - Xinjiang Hu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Luhua Jiang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Yang Ding
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Shaoheng Liu
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| | - Xixian Huang
- College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China; Key Laboratory of Environmental Biology and Pollution Control (Hunan University), Ministry of Education, Changsha 410082, PR China
| |
Collapse
|
8
|
Chen Y, Wang G, Wang H, Cheng C, Zang G, Guo X, Liu RH. Phytochemical profiles and antioxidant activities in six species of ramie leaves. PLoS One 2014; 9:e108140. [PMID: 25243741 PMCID: PMC4171523 DOI: 10.1371/journal.pone.0108140] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2014] [Accepted: 08/21/2014] [Indexed: 12/02/2022] Open
Abstract
Increased consumption of vegetables or plant food has been associated with decreased risk of developing major chronic diseases, such as cancers, diabetes, cardiovascular diseases, and age-related functional decline. Ramie leaves are rich in phenolics and flavonoids, which have been suggested for human health benefits. Phenolic contents, flavonoid contents, phenolic compounds, and anti-cancer properties in six species of ramie leaves were analyzed by Folin-reagent method, sodium borohydride/chloranil-based assay (SBC), HPLC method and antiproliferation, cytoxicity, respectively. Antioxidant activities were measured through peroxyl radical scavenging capacity (PSC) method, oxygen radical absorbance capacity (ORAC) method, and cellular antioxidant activity (CAA). Research indicated that Boehmeria penduliflora contained the highest total phenolic content (2313.7±27.28 mg GAE/100 g FW), and flavonoid content (1682.4±27.70 mg CAE/100 g FW). Boehmeria tricuspis showed the highest PSC value (9574.8±117.63 µM vit. C equiv./100 g FW), while Boehmeria penduliflora indicated the highest ORAC value (330.44±16.88 µmol Trolox equiv./g FW). The antioxidant activities were correlated with phenolic contents and flavonoid contents. Boehmeria tricuspis had the highest antiproliferative capacity with the lowest EC50 (4.11±0.19 mg/mL). The results for the analyzed ramie for CAA were significantly different from each other (p<0.05), Boehmeria tricuspis had the highest CAA value (133.63±7.10 µmol QE/100 g). Benzoic acid, 4-coumaric acid, caffeic acid, and ferulic acid were the dominant phenolic ingredients in the ramie leaves according to HPLC analysis. Our research is the first report to study the phytochemical profiles and antioxidant activities in different species of ramie leaves for their health benefit.
Collapse
Affiliation(s)
- Yongsheng Chen
- School of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong, The People's Republic of China
| | - Gaoyan Wang
- Department of Food Science, Cornell University, Ithaca, New York, United States of America
| | - Hong Wang
- School of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong, The People's Republic of China
| | - Chaohua Cheng
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha, Hunan, The People's Republic of China
| | - Gonggu Zang
- Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha, Hunan, The People's Republic of China
| | - Xinbo Guo
- School of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong, The People's Republic of China
- * E-mail: (XBG); (RHL)
| | - Rui Hai Liu
- School of Light Industry and Food Sciences, South China University of Technology, Guangzhou, Guangdong, The People's Republic of China
- Department of Food Science and Institute of Comparative and Environmental Toxicology, Stocking Hall, Cornell University, Ithaca, New York, United States of America
- * E-mail: (XBG); (RHL)
| |
Collapse
|
9
|
Du X, Zhao W, Wang Y, Wang C, Chen M, Qi T, Hua C, Ma M. Preparation of activated carbon hollow fibers from ramie at low temperature for electric double-layer capacitor applications. Bioresour Technol 2013; 149:31-7. [PMID: 24084201 DOI: 10.1016/j.biortech.2013.09.026] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2013] [Revised: 09/02/2013] [Accepted: 09/04/2013] [Indexed: 05/03/2023]
Abstract
Activated carbon hollow fibers (ACHFs) with high surface area were prepared from inexpensive, renewable ramie fibers (RFs) by a single-step activation method under lower temperature than that of other reports. The effects of activation conditions on the pore structure and turbostratic structure of ACHFs were investigated systematically. The results show that ACHFs surface area decreased but micropore volume and conductivity increased as the increase of activation temperature and activation time. The electrochemical measurements of supercapacitors fabricated from these ACHFs electrodes reveal that the electrochemical properties improved with the enhancing of activation degree. However, too high activation temperature can make the ion diffusion resistance increase. It suggests that pore structure and conductivity are as important as surface area to decide the electrochemical performances of ACHFs electrode materials. A maximum capacity of 287 F g(-1) at 50 mA g(-1) was obtained for the ACHFs electrode prepared under suitable conditions.
Collapse
Affiliation(s)
- Xuan Du
- National Engineering Laboratory for Hydrometallurgical Cleaner Production Technology, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, PR China
| | | | | | | | | | | | | | | |
Collapse
|
10
|
Zou M, Li X, Zhao J, Qu Y. Characteristics of polygalacturonate lyase C from Bacillus subtilis 7-3-3 and its synergistic action with PelA in enzymatic degumming. PLoS One 2013; 8:e79357. [PMID: 24236123 PMCID: PMC3827368 DOI: 10.1371/journal.pone.0079357] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2013] [Accepted: 09/29/2013] [Indexed: 11/25/2022] Open
Abstract
An alkaline polygalacturonate lyase (PGL) from Bacillus subtilis 7-3-3, PelC, with diverse depolymerization abilities for different pectin substrates was found. The PGL activity of PelC decreased with increasing degree of methyl esterification of the substrate. PelA and PelC displayed notable synergistic effects in the enzymatic degumming of ramie fibers. Gum loss rates increased by 62% when PelC was used to replace up to three-eighths of the PelA dose (PelC, 60 U g−1 ramie fibers). To the best of our knowledge, this study is the first to report the synergistic action of members of polysaccharide lyase families 1 and 3, represented by PelA and PelC, respectively. The present paper provides new insights into the improvement and production of enzymes used in enzymatic degumming.
Collapse
Affiliation(s)
- Mouyong Zou
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, P. R. China
| | - Xuezhi Li
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, P. R. China
| | - Jian Zhao
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, P. R. China
- * E-mail:
| | - Yinbo Qu
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong, P. R. China
| |
Collapse
|
11
|
Sung MJ, Davaatseren M, Kim SH, Kim MJ, Hwang JT. Boehmeria nivea attenuates LPS-induced inflammatory markers by inhibiting p38 and JNK phosphorylations in RAW264.7 macrophages. Pharm Biol 2013; 51:1131-1136. [PMID: 23750815 DOI: 10.3109/13880209.2013.781196] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
CONTEXT Boehmeria nivea (Linn.) Gaudich (Urticaceae), a natural herb, has a long history of treating several diseases including wound healing. However, the anti-inflammatory effect of B. nivea has not been investigated. OBJECTIVE We investigated whether the 70% ethanol extract of B. nivea (Ebn) can exert anti-inflammatory activity. Several phenolic compounds of extracts were determined to provide further information on the correlation between anti-inflammatory effects and phenolic compounds. MATERIALS AND METHODS We prepared a 70% ethanol extract of B. nivea leaves and evaluated its anti-inflammatory activity (200, 400, 800, 1200 µg/mL) by measuring the secretions of nitric oxide (NO), tumor necrosis factor alpha (TNF-α) and interleukin 6 (IL-6), which were stimulated by lipopolysaccharide (LPS) in RAW264.7 macrophages. The total phenolic compounds were determined by the Folin-Ciocalteu method and major compounds were determined by HPLC. RESULTS Ebn was able to abolish the LPS-induced secretions of NO, TNF-α and IL-6. It also decreased the protein levels (IC₅₀ = 186 µg/mL) of LPS-induced inducible nitric oxide synthase (iNOS). The LPS stimulated p38, JNK and ERK phosphorylations significantly more than the controls. Surprisingly, although Ebn reduced p38 and JNK phosphorylations, it did not influence ERK phosphorylation. We found that Ebn revealed several major compounds such as chlorogenic acid (1.96 mg/100 g), rutin (46.48 mg/100 g), luteolin-7-glucoside (11.29 mg/100 g), naringin (1.13 mg/100 g), hesperidin (23.69 mg/100 g) and tangeretin (1.59 mg/100 g). DISCUSSION AND CONCLUSION Boehmeria nivea exerts an anti-inflammatory effect on macrophages by inhibiting p38 and JNK, suggesting that it may be used as a functional ingredient against inflammation.
Collapse
Affiliation(s)
- Mi Jeong Sung
- Korea Food Research Institute, Seongnam, Republic of Korea
| | | | | | | | | |
Collapse
|
12
|
Wang B, Wang K. Removal of copper from acid wastewater of bioleaching by adsorption onto ramie residue and uptake by Trichoderma viride. Bioresour Technol 2013; 136:244-250. [PMID: 23567687 DOI: 10.1016/j.biortech.2013.03.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 02/28/2013] [Accepted: 03/02/2013] [Indexed: 06/02/2023]
Abstract
A continuous batch bioleaching was built to realize the bioleaching of sewage sludge in large scale. In the treatment, heavy metal in acid wastewater of bioleaching was removed by adsorption onto ramie residue. Then, acid wastewater was reused in next bioleaching batch. In this way, most time and water of bioleaching was saved and leaching efficiency of copper, lead and chromium kept at a high level in continuous batch bioleaching. It was found that residual heavy metal in sewage sludge is highly related to that in acid wastewater after bioleaching. To get a high leaching efficiency, concentration of heavy metal in acid wastewater should be low. Adsorption of copper from acid wastewater onto ramie residue can be described by pseudo first-order kinetics equation and Freundlich isotherm model. Trichoderma viride has the potential to be used for the concentration and recovery of heavy metal adsorbed onto ramie residue.
Collapse
Affiliation(s)
- Buyun Wang
- School of Environmental Engineering, Wuhan Textile University, Wuhan 430073, PR China.
| | | |
Collapse
|
13
|
Zhang T, Yan H, Peng M, Wang L, Ding H, Fang Z. Construction of flame retardant nanocoating on ramie fabric via layer-by-layer assembly of carbon nanotube and ammonium polyphosphate. Nanoscale 2013; 5:3013-3021. [PMID: 23459988 DOI: 10.1039/c3nr34020a] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A new flame retardant nanocoating has been constructed by the alternate adsorption of polyelectrolyte amino-functionalized multiwall carbon nanotube (MWNT-NH2) and ammonium polyphosphate (APP) onto flexible and porous ramie fabric. Scanning electron microscopy indicates that the adsorbed carbon nanotube coating is a randomly oriented and overlapped network structure, which is a promising candidate for flame retardancy applications. Attenuated total reflection Fourier transform infrared spectroscopy and energy-dispersive X-ray analysis confirm that the APP is successfully incorporated into the multilayers sequentially. Assessment of the thermal and flammability properties for the pristine and nanocoated ramie fabrics shows that the thermal stability, flame retardancy and residual char are enhanced as the concentration of MWNT-NH2 suspension and number of deposition cycles increases. The enhancements are mostly attributed to the barrier effect of intumescent network structure, which is composed of MWNT-NH2 and the absorbed APP.
Collapse
Affiliation(s)
- Tao Zhang
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | | | | | | | | | | |
Collapse
|
14
|
Wang B, Li T, Zhu N, Xiao B. Nitrogen removal of ramie stalk treated by acid wastewater combined with Clostridium thermocellum and the kinetic study of pyrolysis. Bioresour Technol 2013; 129:1-6. [PMID: 23220819 DOI: 10.1016/j.biortech.2012.11.045] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 11/07/2012] [Accepted: 11/09/2012] [Indexed: 06/01/2023]
Abstract
A pretreatment was developed to remove nitrogen from ramie residue and cotton stalk to eliminate potential nitrogen pollutants in biomass energy production. In the pretreatment, straw was treated with acid wastewater from bioleaching for 3 h followed by Clostridium thermocellum incubation for 2 h. Most nitrogen was removed from biomass waste and the major was that in protein. Pyrolysis process revealed most hemicellulose was removed and the kinetics fitted the first-order equation well. Apparent activation energy of ramie residue increased a little and mass loss became concentrated. Ultimate analysis and pyrolysis analysis revealed the treatment did not weaken the application value of biomass in energy production. Replacing acid wastewater with sulphuric acid, a higher nitrogen removal could be achieved; however, activation energy increased sharply.
Collapse
Affiliation(s)
- Buyun Wang
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China
| | | | | | | |
Collapse
|
15
|
Cheng G, Zhang L, He P, Yan F, Xiao B, Xu T, Jiang C, Zhang Y, Guo D. Pyrolysis of ramie residue: kinetic study and fuel gas produced in a cyclone furnace. Bioresour Technol 2011; 102:3451-3456. [PMID: 21094601 DOI: 10.1016/j.biortech.2010.10.120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2010] [Revised: 10/23/2010] [Accepted: 10/25/2010] [Indexed: 05/30/2023]
Abstract
The thermal decomposition behavior of ramie residue (RR) and the characteristics of fuel gas produced in a cyclone furnace were studied. The pyrolysis kinetics was investigated using thermogravimetric analysis (TGA) at heating rates of 5-20°C/min. The results showed that RR mainly decomposed between 250 and 390°C, and the apparent activation energy ranged from 200 to 258 kJ/mol. In the cyclone furnace, fast pyrolysis, partial combustion and gasification occurred almost simultaneously, and the thermal energy was supplied by partial combustion of RR powder at the hypo stoichiometric amount of air. Higher effect of equivalence ratio (ER) led to higher reaction temperature and fewer contents of tar and char, but too high ER lowered fuel gas content and degraded fuel gas quality. Over the ranges of the experimental conditions, the gas yield varied between 1.07 and 2.08 N m(3)/kg and the LHV was between 3350 and 4798 kJ/Nm(3).
Collapse
Affiliation(s)
- Gong Cheng
- School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, PR China
| | | | | | | | | | | | | | | | | |
Collapse
|
16
|
Shao LJ, Wang JN. [Studies on the chemical constituents of radix Boehmeriae]. Zhong Yao Cai 2010; 33:1091-1093. [PMID: 21137364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
OBJECTIVE To study the chemical constituents from Radix Boehmeriae. METHODS Compounds were isolated by various column chromatographies with silica gel, their structures were elucidated by spectral analysis and chemical evidence. RESULTS Eight compounds were isolated and their structures were identified as emodin (1), emodin-8-O-beta-glucopyranoside (2), physcion (3), polydatin (4), catechin (5), epicatechin (6), potassium nitrate (7), sitosterol (8). CONCLUSION Among these compounds, 3 -7 are isolated from Radix Boehmeriae for the first time.
Collapse
Affiliation(s)
- Li-Jun Shao
- Xiyuan Hospital China Academy of Traditional Chinese Medicine, Beijing 100091, China.
| | | |
Collapse
|
17
|
Liu C, Zou K, Guo Z, Zhao Y, Cheng F, Zhang H. [Chemical constituents from leaves of Boehmeria nivea]. Zhongguo Zhong Yao Za Zhi 2010; 35:1432-1434. [PMID: 20822015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
OBJECTIVE To study the chemical constituents from the leaves of Boehmeria nivea. METHOD The leaves were extracted by 95% EtOH at room temprature, the chemical leaves were isolated and purified by repeated silica gel column chromatography, Sephadex LH-20 column chromatography and semipreparative HPLC, and their structures were identified by physical and chemical properties and spectroscpoic methods. RESULT One compound isolated from n-butanol fraction, four compounds were obtained from ethyl acetate fraction and three compounds from petroleum ether fraction. Their structures were elucidated as kiwiionoside (1), eugenyl beta-rutinoside (2), uracil (3), beta-sitosterol glucoside (4), 3-hydroxy-4-methoxy-benzoic acid (5), cholesterol (6), alpha-amyrin (7). nonacosanol (8). CONCLUSION Compounds 1-3, 5-8 were isolated from the genus Boehmeria for the first time.
Collapse
Affiliation(s)
- Chuang Liu
- Hubei Key Laboratory of Natural Products Research and Development, China Three Gorges University, Yichang 443002, China.
| | | | | | | | | | | |
Collapse
|
18
|
Semwal DK, Rawat U, Semwal R, Singh R, Krishan P, Singh M, Singh GJP. Chemical constituents from the leaves of Boehmeria rugulosa with antidiabetic and antimicrobial activities. J Asian Nat Prod Res 2009; 11:1045-1055. [PMID: 20183275 DOI: 10.1080/10286020903352526] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Three new flavonoid glycosides, named chalcone-6'-hydroxy-2',3,4-trimethoxy-4'-O-beta-D-glucopyranoside (1), isoflavone-3',4',5,6-tetrahydroxy-7-O-[beta-D-glucopyranosyl-(1-->3)-alpha-L-rhamnopyranoside] (2), and isoflavone-3',4',5,6-tetrahydroxy-7-O-[beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl-(1-->3)-alpha-L-rhamnopyranoside] (3), were isolated from the leaves of Boehmeria rugulosa, together with five known compounds, beta-sitosterol, quercetin, 3,4-dimethoxy-omega-(2'-piperidyl)-acetophenone (4), boehmeriasin A (5), and quercetin-7-O-beta-D-glucopyranoside. The structures of the isolated compounds were determined by means of chemical and spectral data including 2D NMR experiments. The ethanolic extract of leaves showed significant hypoglycemic activity on alloxan-induced diabetic mice. Glibenclamide, an oral hypoglycemic agent (5 mg/kg, p.o.), was used as a positive control. The ethanolic extract of the plant as well as the isolated compounds 1-3 (25 microg/ml) showed potent antimicrobial activity against two bacterial species (Staphylococcus aureus and Streptococcus mutans) and three fungus pathogens (Microsporum gypseum, Microsporum canis, and Trichophyton rubrum). The activities of the isolated compounds 1-3 have been compared with positive controls, novobiocin, and erythromycin (15 microg/ml).
Collapse
Affiliation(s)
- Deepak Kumar Semwal
- Department of Chemistry, H N B Garhwal University, Srinagar, Uttarakhand, India.
| | | | | | | | | | | | | |
Collapse
|
19
|
Xu Q, Chen G, Fan J, Zhang M, Li X, Yang S, Li X. [Chemical constituents of roots of Boehmeria nivea]. Zhongguo Zhong Yao Za Zhi 2009; 34:2610-2612. [PMID: 20069903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
OBJECTIVE To investigate the chemical constituents from roots of Boehmeria nivea. METHOD The constituents were isolated by repeated column chromatography and preparative liquid chromatography; and their structures were elucidated by chemical properties and spectroscopic analyses. RESULT Seven compounds were isolated and their structures were identified as tormentic acid (1), hederagenin (2), maslinic acid (3), 2alpha-hydroxyursolic acid (4), trans-p-hydroxycinamic acid (5), 2,4,4'-trihydroxychalcone (6), rutin (7). CONCLUSION Compounds 1-6 were obtained from this genus for the first time.
Collapse
Affiliation(s)
- Qiongming Xu
- College of Pharmacy, SooChow University, Suzhou, China
| | | | | | | | | | | | | |
Collapse
|
20
|
Abstract
AIM: To explore the anti-hepatitis B virus (HBV) effects of Boehmeria nivea (B. nivea) root extract (BNE) by using the HepG2 2.2.15 cell model system.
METHODS: Hepatitis B surface antigen (HBsAg), hepatitis B virus e antigen (HBeAg), and HBV DNA were measured by using ELISA and real-time PCR, respectively. Viral DNA replication and RNA expression were determined by using Southern and Northern blot, respectively.
RESULTS: In HepG2 2.2.15 cells, HBeAg (60%, P < 0.01) and particle-associated HBV DNA (> 99%, P < 0.01) secretion into supernatant were significantly inhibited by BNE at a dose of 100 mg/L, whereas the HBsAg was not inhibited. With different doses of BNE, the reduced HBeAg was correlated with the inhibition of HBV DNA. The anti-HBV effect of BNE was not caused by its cytotoxicity to cells or inhibition of viral DNA replication and RNA expression.
CONCLUSION: BNE could effectively reduce the HBV production and its anti-HBV machinery might differ from the nucleoside analogues.
Collapse
MESH Headings
- Antiviral Agents/pharmacology
- Boehmeria/chemistry
- Carcinoma, Hepatocellular/drug therapy
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Carcinoma, Hepatocellular/virology
- Cell Line, Tumor
- Cytotoxins/pharmacology
- DNA Replication/drug effects
- DNA, Viral/genetics
- DNA, Viral/metabolism
- Gene Expression Regulation, Neoplastic/drug effects
- Gene Expression Regulation, Viral/drug effects
- Hepatitis B Surface Antigens/genetics
- Hepatitis B Surface Antigens/metabolism
- Hepatitis B e Antigens/genetics
- Hepatitis B e Antigens/metabolism
- Hepatitis B virus/drug effects
- Hepatitis B virus/genetics
- Hepatitis B virus/immunology
- Hepatitis B virus/metabolism
- Humans
- Liver Neoplasms/drug therapy
- Liver Neoplasms/metabolism
- Liver Neoplasms/pathology
- Liver Neoplasms/virology
- Plant Extracts/analysis
- Plant Extracts/pharmacology
- Plant Extracts/therapeutic use
- Plant Roots/chemistry
- RNA, Viral/genetics
- RNA, Viral/metabolism
- Transcription, Genetic/drug effects
Collapse
Affiliation(s)
- Kai-Ling Huang
- Division of Research and Development, Development Center for Biotechnology, Xizhi City, Taipei County, Taiwan 221, China
| | | | | | | |
Collapse
|
21
|
Cai XF, Jin X, Lee D, Yang YT, Lee K, Hong YS, Lee JH, Lee JJ. Phenanthroquinolizidine alkaloids from the roots of Boehmeria pannosa potently inhibit hypoxia-inducible factor-1 in AGS human gastric cancer cells. J Nat Prod 2006; 69:1095-7. [PMID: 16872154 DOI: 10.1021/np060081y] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A bioassay-guided phytochemical investigation on the methanol extract of Boehmeria pannosa, using a HIF-1-mediated reporter gene assay, led to the isolation of two phenanthroquinolizidine alkaloids, (-)-cryptopleurine (1) and (-)-(15R)-hydroxycryptopleurine (2). The structure of the new compound 2 was determined by spectroscopic methods. Compounds 1 and 2 potently inhibited the hypoxia-induced expression of a reporter gene under the control of a hypoxia response element (HRE) with IC(50) values of 8.7 and 48.1 nM, respectively. Furthermore, 1 and 2 suppressed the accumulation of HIF-1alpha protein in a dose-dependent manner, but not the HIF-1beta protein and inhibited expression of vascular endothelial growth factor (VEGF) by hypoxia.
Collapse
Affiliation(s)
- Xing Fu Cai
- Korea Research Institute of Bioscience and Biotechnology, P.O. Box 115, Yuseong, Daejeon 305-600, Korea
| | | | | | | | | | | | | | | |
Collapse
|
22
|
Sharma DC, Satyanarayana T. A marked enhancement in the production of a highly alkaline and thermostable pectinase by Bacillus pumilus dcsr1 in submerged fermentation by using statistical methods. Bioresour Technol 2006; 97:727-33. [PMID: 15936940 DOI: 10.1016/j.biortech.2005.04.012] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2005] [Revised: 03/28/2005] [Accepted: 04/04/2005] [Indexed: 05/02/2023]
Abstract
The production of a highly alkaline and thermostable pectinase of Bacillus pumilus was optimized in submerged fermentation using Plackett-Burman design and response surface methodology. Three fermentation variables (C:N ratio, K(2)HPO(4), and pH), which were identified to significantly affect pectinase production by Plackett-Burman design were further optimized using response surface methodology of central composite design (CCD). An over all 34- and 41-fold increase in enzyme production was achieved in shake flasks and lab fermenter by the optimization of variables using statistical approaches, respectively. The enzyme was optimally active at pH 10.5 and 50 degrees C, and selectively degraded only the noncellulosic gummy material of ramie (Boehmeria nivea) fibres causing 10.96% fibre weight loss, and therefore, the enzyme could find application in fibre processing industry. The use of the enzyme in fibre processing reduces the use of alkali, and the associated alkalinization of water bodies.
Collapse
Affiliation(s)
- D C Sharma
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi 110021, India
| | | |
Collapse
|
23
|
Abstract
The recently developed technique of reductive amination, followed by gold labeling, was applied to visualize the reducing ends of cellulose microcrystals from cellulose I, cellulose II, and cellulose III(I). In these crystals, which were also characterized by electron diffraction, the labeling proved that the chains were organized in a parallel fashion in cellulose I from ramie and Valonia and also in cellulose III(I) from Valonia. In microcrystals of cellulose II from mercerized ramie, the labeling method showed that the chains were packed into an antiparallel mode. These results are discussed in terms of the fine structure of cellulose I where neighboring microfibrils of opposite polarity are visualized. The mercerization process whereby cellulose I is converted into cellulose II is therefore best described in terms of an intermingling of the cellulose chains from neighboring microfibrils of opposite polarity. As opposed to the case of mercerization the conversion of cellulose I into cellulose III(I) does not require the participation of neighboring microfibrils since the crystalline domains are converted individually.
Collapse
Affiliation(s)
- Nam-Hun Kim
- College of Forest Sciences, Kangwon National University, Chunchon 200-701, Korea
| | | | | | | |
Collapse
|
24
|
Abstract
Small angle neutron scattering studies have been carried out on cellulose fibers from ramie and Populus maximowicii (cotton wood). Labile hydrogen atoms were replaced by deuterium atoms, in water-accessible disordered regions of the fibers, to increase the neutron scattering contrast between the disordered and crystalline regions. A meridional Bragg reflection, corresponding to a longitudinal periodicity of 150 nm, was observed when scattering collected from hydrogenated and deuterated dry ramie fibers was subtracted. No Bragg reflection was observed with the cotton wood fibers, probably because of lower orientation of the microfibrils in the cell wall. The ramie fibers were then subjected to electron microscopy, acid hydrolysis, gel permeation chromatography, and viscosity studies. The leveling off degree of polymerization (LODP) of the hydrolyzed samples matched exactly the periodicity observed in the diffraction studies. The weight loss related to the LODP was only about 1.5%, and thus, the microfibrils can be considered to have 4-5 disordered residues every 300 residues.
Collapse
Affiliation(s)
- Yoshiharu Nishiyama
- School of Agricultural and Life Science, The University of Tokyo, Tokyo 113-8657, Japan.
| | | | | | | | | | | |
Collapse
|
25
|
Abstract
A revised crystal structure for mercerized cellulose based on high-resolution synchrotron X-ray data collected from ramie fibers is reported (space group P2(1), a = 8.10(3) A, b = 9.03(3) A, c = 10.31(5) A, gamma = 117.10(5) degrees; 751 reflections in 304 composite spots; theta < 21.11 degrees; lambda = 0.7208 A; LALS refinement with d > 1.5 A, R' ' = 0.16; SHELX97 refinement with d > 1 A, R = 0.21). As with regenerated cellulose the crystal structure consists of antiparallel chains with different conformations but with the hydroxymethyl groups of both chains near the gt position. However, the conformation of the hydroxymethyl group of the center chain in the structure reported here differs significantly from the conformation in regenerated cellulose. This may be related to a large observed difference in the amount of hydroxymethyl group disorder: approximately 30% for regenerated cellulose and approximately 10% for mercerized cellulose.
Collapse
Affiliation(s)
- P Langan
- Biosciences Division, M888, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | | | | |
Collapse
|