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Research Progress of Deep Eutectic Solvents in Extraction of Plant Flavonoids
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作者 Zhen LIN Shengmei XU +2 位作者 Shaomei CHEN Cui WANG Jian CHEN 《Agricultural Biotechnology》 2024年第3期34-40,44,共8页
As a new type of green solvents,deep eutectic solvents(DESs)have the advantages of strong extraction ability,designability,simple preparation,low price,recoverability and biodegradation,and show great application pote... As a new type of green solvents,deep eutectic solvents(DESs)have the advantages of strong extraction ability,designability,simple preparation,low price,recoverability and biodegradation,and show great application potential in the field of plant flavonoid extraction.In this paper,the definition,classification and preparation methods of DESs were introduced.The effects of DES composition,molar ratio of DES components,water content of DES systems,liquid-material ratio,extraction temperature,extraction time and extraction auxiliary techniques on the extraction yield of plant flavonoids were expounded.The recycling methods of DESs were summarized.Existing problems of DESs in the field of plant flavonoids extraction were pointed out,and further research direction and trend were analyzed and prospected. 展开更多
关键词 Deep eutectic solvent Plant flavonoid EXTRACTION Assistive technique REGENERATION
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Chemical composition,energy and amino acid digestibility in double-low rapeseed meal fed to growing pigs 被引量:6
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作者 Peili Li Fengli Wang +3 位作者 Fei Wu Jinrong Wang Ling Liu Changhua Lai 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2015年第4期445-454,共10页
Background: The nutritional value of rapeseed meal may be variable due to the variation of its chemical composition. And a precise understandin9 of the nutritional value of an ingredient is beneficial for the accurat... Background: The nutritional value of rapeseed meal may be variable due to the variation of its chemical composition. And a precise understandin9 of the nutritional value of an ingredient is beneficial for the accurate diet formulation and reduction of feed costs. This study was conducted to determine the chemical composition, dicjestible energy (DE) and metabolizable enercjy (ME) content, and apparent ileal digestibility (AID) and standardized ileal dicjestibility (SID) of amino acids (AA) for growincj pigs. Thirteen solvent-extracted double-low rapeseed meal (DLIRSM) samples were obtained from the main double-low rapeseed producing areas in China. Methods: The DE and ME contents of the 13 DLRSM samples were measured in cjrowin9 pigs (six pigs per DLRSM sample, average initial body weicjht (BW) =48.3 kg). The AID and SID of AA of 10 DLRSM samples were determined in 12 crossbred barrows (average initial BW = 35.3 kcj) by using two 6 x 6 Latin square designs. Each Latin square comprised one N-flee diet and 5 DLRSM test diets. Results: The chemical composition of DLRSM varied among samples, and the coefficient of variation was greater than ]0 % for ether extract (EE), neutral detergent fiber (NDF), acid detergent fiber (ADF), calcium (Ca), and total 91ucosinolates. The AA content of DLRSM varied among samples especially for lysine (Lys) and methionine (Met). On a dry matter (DM) basis, the apparent total tract digestibility (ATFD) of gross energy (GE), the DE and ME and the ME:DE ratio of DLRSM averaged 62.39 %, 2862 kcal/k9 and 2723 kcal/kcj, and 94.95 %, respectively. The mean value of S1D of Lys was 70.52 % which varied from 66.54-76.54 %. The SID of crude protein (CP), Met, and threonine (Thr) averaged 72.81%, 82.41%, and 69.76 %, respectively. Conclusions: There was great variability in chemical composition especially in the concentration of EE, NDF and ADF, but no significant differences in energy content of the DLIRSM samples were observed. In addition, the AID and SID of all AA were relatively similar amoncj DLRSM samples except for that of Lys. 展开更多
关键词 Digestible energy Double-low rapeseed meal Growing pigs Ileal digestibility of amino acids Metabolizable energy
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Synthesis of thiadiazole-based Schiff base metal complexes and their inhibition rate to superoxide anion free radical 被引量:1
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作者 王建华 《Journal of Chongqing University》 CAS 2005年第4期223-228,共6页
A new series of Schiff base ligands were synthesized by the condensation of 2-amino-5-mercaptan-l,3,4-thiadiazole and salicylaldehyde or 2,4-dihydroxybenzaldehyde and their derivatives with choroacetic acid, and furth... A new series of Schiff base ligands were synthesized by the condensation of 2-amino-5-mercaptan-l,3,4-thiadiazole and salicylaldehyde or 2,4-dihydroxybenzaldehyde and their derivatives with choroacetic acid, and further reaction with corresponding metal acetate to form metal complexes. The compositions and structures of the ligands and their complexes were characterized by elemental analysis, molar conductivities, electronic absorption spectra and infra-red spectra. Their inhibition rates to free radical, such as O2, were also tested. The results show that all of the obtained complexes display significant activities, among which the copper(Ⅱ) complexes have the best inhibitive effects. 展开更多
关键词 THIADIAZOLE schiff base coordination compounds anti-superoxide free radical activities
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Separation of gibberellic acid (GA3) by macroporous adsorption resins
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作者 Ruifang WANG Jialing YANG +1 位作者 Zuoqing SHI Lailiang OU 《Frontiers of Chemical Science and Engineering》 SCIE EI CSCD 2008年第2期171-175,共5页
The adsorption effects of several macroporousadsorption resins for gibberellic acid (GA3) were investigated.The dynamic adsorption capacity is 58.38 mg/g drybeads for resin R4 and 96.46 mg/g dry beads for resin R5whic... The adsorption effects of several macroporousadsorption resins for gibberellic acid (GA3) were investigated.The dynamic adsorption capacity is 58.38 mg/g drybeads for resin R4 and 96.46 mg/g dry beads for resin R5which is consistent with the surface area. Aqueous methanol(50%, V/V) is a good eluent and the yield of GA3 isabove 95%. The concentration of GA3 could increase fivefoldafter an adsorption-elution cycle and this is importantwhen considering further crystallization of GA3 in anindustrial process. 展开更多
关键词 gibberellic acid(GA3) ADSORPTION macroporous adsorption resin SEPARATION
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