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Xing L, Zhang M, Liu L, Hu X, Liu J, Zhou X, Chai Z, Yin H. Multiomics provides insights into the succession of microbiota and metabolite during plant leaf fermentation. ENVIRONMENTAL RESEARCH 2023; 221:115304. [PMID: 36649845 DOI: 10.1016/j.envres.2023.115304] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Revised: 12/28/2022] [Accepted: 01/12/2023] [Indexed: 06/17/2023]
Abstract
The quality of fermented plant products is closely related to microbial metabolism. Here, the associations of bacterial communities, metabolites, and functional genes were explored using multi-omics techniques based on plant leaf fermentation systems. The results showed significant changes in the structure of the microbial community, with a significant decrease in Firmicutes and a significant increase in Proteobacteria. In addition, the concentration of metabolites with antibacterial, antioxidant and aroma properties increased significantly, enhancing the quality of the fermented plant leaves. Integrated macrogenomic and metabolomic analyses indicated that amino acid metabolism could be key metabolic pathway affecting fermentation quality. Actinobacteria, Proteobacteria, Firmicutes were actively involved in tyrosine metabolism (ko00350) and phenylalanine metabolism (ko00360), and are presumed to be the major groups responsible for synthesizing growth and flavor compounds. This study emphasized the important role of microorganisms in the changes of metabolites during the fermentation of plant leaves.
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Affiliation(s)
- Lei Xing
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610100, China
| | - Min Zhang
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China
| | - Lulu Liu
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610100, China
| | - Xi Hu
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610100, China
| | - Jie Liu
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610100, China
| | - Xiangping Zhou
- Yongzhou Tobacco Company of Hunan Province, Yongzhou, 425000, China
| | - Zhishun Chai
- China Tobacco Sichuan Industrial Co., Ltd, Chengdu, 610100, China
| | - Huaqun Yin
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China; Key Laboratory of Biometallurgy, Ministry of Education, Changsha, 410083, China.
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C-Heterogenized Re Nanoparticles as Effective Catalysts for the Reduction of 4-Nitrophenol and Oxidation of 1-Phenylethanol. Catalysts 2022. [DOI: 10.3390/catal12030285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Rhenium nanoparticles (Re NPs) supported on Norit (activated carbon—C) and graphene (G) were prepared by a solvothermal method under microwave irradiation (MW). The synthesised heterogeneous catalysts were characterised and tested as reduction and oxidation catalysts, highlighting their dual catalytic behaviour. In the first case, they were used, for the first time, to reduce 4-nitrophenol, in aqueous medium, under MW irradiation. Re catalysts were easily recovered by centrifugation and recycled up to six times without significant activity loss. However, the same Re catalysts in MW-assisted oxidation of 1-phenylethanol with no added solvent experienced a significant loss of activity when recycled. The higher activity of the rhenium nanoparticles supported on graphene (Re/G) catalyst in both reactions was assigned to the higher dispersion and smaller particle size of Re NPs when graphene is the support.
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Glycerol Oxidation over Supported Gold Catalysts: The Combined Effect of Au Particle Size and Basicity of Support. Processes (Basel) 2020. [DOI: 10.3390/pr8091016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Gold nanoparticles supported on various oxides (CeO2, CeO2/TiO2, MgO, MgO/TiO2, La2O3, La2O3/TiO2) (with 4 wt.% Au loading) were investigated in the liquid (aqueous) phase oxidation of glycerol by molecular oxygen under mild conditions, in the presence of alkaline earth (CaO, SrO and MgO) or alkaline (NaOH) bases. Full conversion and selectivity between 38 and 68% to sodium glycerate were observed on different Au supported catalysts (Au/MgO/TiO2, Au/La2O3/TiO2, Au/CeO2 and Au/CeO2/TiO2). The combined effect of Au particle size and basicity of the support was suggested as the determining factor of the activity. Agglomeration of gold nanoparticles, found after the reaction, led to the deactivation of the catalysts, which prevents the further oxidation of sodium glycerate into sodium tartronate. Promising results were obtained with the use of alkaline earth bases (CaO, SrO, MgO), leading to the formation of free carboxylic acids instead of salts, which are formed in the presence of the more usual base, NaOH.
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Pakrieva E, Kolobova E, Kotolevich Y, Pascual L, Carabineiro SAC, Kharlanov AN, Pichugina D, Nikitina N, German D, Zepeda Partida TA, Tiznado Vazquez HJ, Farías MH, Bogdanchikova N, Cortés Corberán V, Pestryakov A. Effect of Gold Electronic State on the Catalytic Performance of Nano Gold Catalysts in n-Octanol Oxidation. NANOMATERIALS 2020; 10:nano10050880. [PMID: 32370180 PMCID: PMC7279484 DOI: 10.3390/nano10050880] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/24/2020] [Accepted: 04/29/2020] [Indexed: 11/20/2022]
Abstract
This study aims to identify the role of the various electronic states of gold in the catalytic behavior of Au/MxOy/TiO2 (where MxOy are Fe2O3 or MgO) for the liquid phase oxidation of n-octanol, under mild conditions. For this purpose, Au/MxOy/TiO2 catalysts were prepared by deposition-precipitation with urea, varying the gold content (0.5 or 4 wt.%) and pretreatment conditions (H2 or O2), and characterized by low temperature nitrogen adsorption-desorption, X-ray powder diffraction (XRD), energy dispersive spectroscopy (EDX), scanning transmission electron microscopy-high angle annular dark field (STEM HAADF), diffuse reflectance Fourier transform infrared (DRIFT) spectroscopy of CO adsorption, temperature-programmable desorption (TPD) of ammonia and carbon dioxide, and X-ray photoelectron spectroscopy (XPS). Three states of gold were identified on the surface of the catalysts, Au0, Au1+ and Au3+, and their ratio determined the catalysts performance. Based on a comparison of catalytic and spectroscopic results, it may be concluded that Au+ was the active site state, while Au0 had negative effect, due to a partial blocking of Au0 by solvent. Au3+ also inhibited the oxidation process, due to the strong adsorption of the solvent and/or water formed during the reaction. Density functional theory (DFT) simulations confirmed these suggestions. The dependence of selectivity on the ratio of Brønsted acid centers to Brønsted basic centers was revealed.
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Affiliation(s)
- Ekaterina Pakrieva
- Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Lenin Av. 30, 634050 Tomsk, Russia; (E.K.); (D.G.)
- Instituto de Catálisis y Petroleoquímica, Consejo Superior de InvestigacionesCientíficas, Marie Curie 2, 28049 Madrid, Spain; (L.P.); (V.C.C.)
- Correspondence: (E.P.); (A.P.)
| | - Ekaterina Kolobova
- Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Lenin Av. 30, 634050 Tomsk, Russia; (E.K.); (D.G.)
| | - Yulia Kotolevich
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, P.O. Box 14, Ensenada 22800, Mexico; (Y.K.); (T.A.Z.P.); (H.J.T.V.); (M.H.F.); (N.B.)
| | - Laura Pascual
- Instituto de Catálisis y Petroleoquímica, Consejo Superior de InvestigacionesCientíficas, Marie Curie 2, 28049 Madrid, Spain; (L.P.); (V.C.C.)
| | - Sónia A. C. Carabineiro
- LAQV-REQUIMTE, Department of Chemistry, NOVA School of Science and Technology, Universidade, NOVA de Lisboa, 2829-516 Caparica, Portugal;
| | - Andrey N. Kharlanov
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye Gory, GSP-1, 119991 Moscow, Russia; (A.N.K.); (D.P.); (N.N.)
| | - Daria Pichugina
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye Gory, GSP-1, 119991 Moscow, Russia; (A.N.K.); (D.P.); (N.N.)
| | - Nadezhda Nikitina
- Department of Chemistry, Lomonosov Moscow State University, 1-3 Leninskiye Gory, GSP-1, 119991 Moscow, Russia; (A.N.K.); (D.P.); (N.N.)
| | - Dmitrii German
- Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Lenin Av. 30, 634050 Tomsk, Russia; (E.K.); (D.G.)
| | - Trino A. Zepeda Partida
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, P.O. Box 14, Ensenada 22800, Mexico; (Y.K.); (T.A.Z.P.); (H.J.T.V.); (M.H.F.); (N.B.)
| | - Hugo J. Tiznado Vazquez
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, P.O. Box 14, Ensenada 22800, Mexico; (Y.K.); (T.A.Z.P.); (H.J.T.V.); (M.H.F.); (N.B.)
| | - Mario H. Farías
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, P.O. Box 14, Ensenada 22800, Mexico; (Y.K.); (T.A.Z.P.); (H.J.T.V.); (M.H.F.); (N.B.)
| | - Nina Bogdanchikova
- Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México, P.O. Box 14, Ensenada 22800, Mexico; (Y.K.); (T.A.Z.P.); (H.J.T.V.); (M.H.F.); (N.B.)
| | - Vicente Cortés Corberán
- Instituto de Catálisis y Petroleoquímica, Consejo Superior de InvestigacionesCientíficas, Marie Curie 2, 28049 Madrid, Spain; (L.P.); (V.C.C.)
| | - Alexey Pestryakov
- Research School of Chemistry & Applied Biomedical Sciences, National Research Tomsk Polytechnic University, Lenin Av. 30, 634050 Tomsk, Russia; (E.K.); (D.G.)
- Correspondence: (E.P.); (A.P.)
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