Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Zhao Mengxing,Liu Yingying,Yin Peipei,Wu Shijie,An Xingye,Qin Tong,Liu Hongbin
Extraction of tobacco extracts from tobacco leaf scraps can promote the maximum utilization of tobacco waste and offer tobacco industries a formula to improve cigarette qualities and flavors. Tobacco extracts can be used as a reconstituted tobacco coating solution for reconstituted tobacco sheet (RTS)-based paper. Aroma components in the tobacco extracts can determine the fragrance style of the RTS. However, traditional extraction methods usually have many problems. Herein, the ultrasound-assisted enzymatic hydrolysis was first applied to improve the aroma of tobacco extracts from tobacco leaf scraps. After ultrasound-assisted enzymatic hydrolysis, the total aroma components content in tobacco extracts was increased by 5.0 times compared with that in aqueous extracts, and the total extraction yield was increased by 51.57%. Moreover, other compositions in tobacco extracts, including total sugar, nicotine, lignin, total phenols, formic acid, and acetic acid were also increased. This study provides a method to improve the aroma in the tobacco extracts and the quality of RTS. Graphical abstract
研究领域:
食品科学与工程
·
生物技术
✓ 已验证
DOI
高影响因子
Natural Product Communications
·
2025
·
IF 1.4
Jie Xu,Yanfang Yang,Qianqian Li,Ziyi Dong,Yaoyang Guo,Zhansheng Jiang
ObjectivesThe current work aimed to isolate and identify new interesting small-molecule natural products from the leaves of a well-known medicinal plant Morus alba.MethodsThe ethanol extract of M. alba leaves was partitioned between EtOAc and water, and the EtOAc soluble part was fractionated by macroporous resin column chromatograph (CC) eluted with gradient EtOH. The 80% EtOH eluate was subject to silica gel, reversed phase C18, MCI gel and Sephadex LH-20 CC and finally purified by HPLC to afford four minor compounds 1–4, and the racemic 1 and 2 were further separated by chiral columns. Structural elucidation of these isolates was achieved via spectroscopic means especially HR-ESIMS and NMR, with the absolute configurations of new compounds assigned by ECD analyses. The cytotoxic screening was performed by MTT assay.ResultsA pair of new quinone enantiomers (1a/1b), a pair of new stilbenoid enantiomers (2a/2b), a known prenyl stilbenoid (3) and a known dihydrochalcone (4) were isolated and structurally characterized from the leaves of M. alba. They did not show significant cytotoxicity against MDA-MB231, A549, Hela and 4T1 tumor cell lines.ConclusionsThe M. alba leaves represent a rich source of new natural products, and the currently obtained constituents did not exert obvious growth inhibitory activity against the tested tumor cell lines. The bioactivities of the new isolates deserve further exploration in the future.
研究领域:
天然药物化学
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植物化学
·
分子生物学
·
药用植物学
·
药物代谢
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2024
·
IF 5.6
Yanfei Li,Chunquan Zhao,Nan Hu,Yang Jing,Lin Chen,Yunqing Guo,Zhijun Zhang
Anthocyanins (ACNs) are the primary bioactive compounds of purple perilla leaves with a variety of biological activities. The scale separation of perilla ACNs is crucial for their practical application. This study presents the development of a green and highly efficient foam fractionation technology employing a protein-based frother and collector. The protein utilized, namely perilla seed meal protein (PSMP), is derived from perilla seed meal (PSM), which is normally discarded as an industrial waste during seed oil extraction. PSMP demonstrated notable foamability and foam stability. The interaction or collection mechanism between PSMP and ACNs was comprehensively investigated by SEM-EDS, FTIR, and fluorescence spectroscopy , revealing a hydrophobic interaction between PSMP and ACNs. Furthermore, the impacts of PSMP concentration, pH, and gas velocity on the foam fractionation of ACNs were thoroughly examined. Response surface methodology (RSM) was used to optimize the operating conditions for ACNs separation. Remarkable results were achieved under the optimum conditions, including a high recovery percentage of 95.13% and an impressive enrichment ratio of 27.56. The composition and antioxidation of isolated ACNs product were characterized, revealing its excellent antioxidant activities . This highlights its potential applications in drugs, food, and cosmetics. This work not only highlights an efficient foam fractionation technology for ACNs separation, but also offers valuable insights into the separation of other active plant components.
研究领域:
食品科学
·
植物化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2013
·Vol. 36
·期 5
·733-739
·
IF 1.366
C. Prommuak,P. Pavasant,A. T. Quitain,M. Goto,A. Shotipruk
Biodiesel and valuable free lutein were demonstrated to be simultaneously produced from Chlorella vulgaris lipid extracts. The alkali catalyst used in the transesterification of triglycerides acted as a reactant in converting lutein fatty acid esters to free lutein. A maximum biodiesel yield of 33.6 % by weight of the algal lipids was obtained after a 4-h reaction with MeOH at the MeOH/biomass ratio of 16:1 using 6 % alkali catalyst. The excess of alkali and MeOH employed in the production of biodiesel ensured the complete saponification of all lutein fatty acid esters to free lutein, giving a maximum yield of 2.3 % by weight of the algal lipids. In addition, a process for the separation of the biodiesel and free lutein products from the reaction mixture is proposed. Finally, a preliminary economic assessment was conducted, the results of which suggest that the process for the simultaneous production of biodiesel and lutein from C. vulgaris may be economically feasible.
研究领域:
生物工程
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能源生物学
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植物化学
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2024
·Vol. 19
·期 17
·e202400529
·
IF 3.5
Ying Zhang,Yujing Ren,Jingyan Hao,Juan Gao,Yurong Ma
Hyperspectral imaging technology can record the spatial and spectral information of the targets and significantly enhance the levels of military reconnaissance and target detection. It has scientific importance to mimic “homochromatic and homospectral” camouflage materials that have hyperspectral similarity with the green vegetation, one of the most common natural backgrounds. It is a big challenge to exquisitely simulate the spectral of green vegetation in visible and near-infrared windows because of the slight differences between the artificial green dyes and vegetation, the instability of chlorophylls, and the easy loss of hydroxide bands due to the loss of water from the camouflage materials. Herein, a novel kind of biomimetic material of green vegetation was designed through the incorporation of chlorophylls into the crystal lattices of single-crystalline anhydrous guanine microplates for the first time. The synthesized chlorophylls-doped anhydrous guanine crystals exhibit high reflectance intensity and depolarization effect, thus can be applied as biomimetic camouflage materials that mimic green vegetation with high reflectivity and low polarization in the visible and near-infrared regions. The factors influencing the formation of dye-doped organic crystals under mild conditions were thoroughly investigated and the characterizations using electron microscopies and fluorescence confocal laser scanning microscopy clearly confirm the occlusion of chlorophylls into the crystal lattices of guanine crystals. The thermal stability experiments clearly indicate that the chlorophylls-doped guanine crystals possess long-term stability at high temperature. This study provides a new strategy for the synthesis of multifunctional materials comprised of organic crystals.
研究领域:
材料科学
·
仿生学
·
光谱学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2015
·
IF 3.091
Xiaoguo Fu,Hongzhang Chen
In order to achieve the desirable extraction yield of thermosensitive chlorogenic acid, a novel air–steam explosion with low temperature was developed to pretreat Eucommia ulmoides leaves in this study. The correlation of temperature and different partial pressure of air was investigated, and the pretreatment performance was evaluated by the extraction efficiency and antioxidant capacity of chlorogenic acid. Results showed that the pretreatment temperature obviously decreased with the increase of air partial pressure. Mixed with 0.4 MPa of air partial pressure, the temperature of gas mixture was 26.69% lower than that without air (0.8 MPa of steam). After pretreatment for 120 s, the yield, extraction rate, and OH − and O 2 − scavenging ratios of chlorogenic acid from air–steam exploded sample were 2.83%, 0.182 min −1 , 31.10% and 95.85%, respectively, which were 62.0%, 423.0%, 94.6% and 9.5% higher than those from raw sample. Additionally, the equilibrium time of chlorogenic acid extraction decreased from 120 min to 15 min. The reason for these results were that the fibrous networks and the cell walls of the leaves were destroyed after air–steam explosion pretreatment, which improved the solute–solvent accessibility and the internal mass transfer in extraction process. Therefore, air–steam explosion was an efficient pretreatment to enhance the extraction performance of chlorogenic acid from E. ulmoides leaves.
研究领域:
植物化学
·
食品科学
·
天然产物开发
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Shuo Shi,Chuanwei Zhi,Shuai Zhang,Jieqiong Yang,Yifan Si,Yuanzhang Jiang,Yang Ming,Kin-tak Lau,Bin Fei,Jinlian Hu
Electrospinning is a feasible technology to fabricate nanomaterials. However, the preparation of nanomaterials with controllable structures of microbeads and fine nanofibers is still a challenge, which hinders widespread applications of electrospun products. Herein, inspired by the micro/nanostructures of lotus leaves, we constructed a structured electrospun membrane with excellent comprehensive properties. First, micro/nanostructures of membranes with adjustable microbeads and nanofibers were fabricated on a large scale and quantitatively analyzed based on the controlling preparation, and their performances were systematically evaluated. The deformation of diverse polymeric solution droplets in the electrospinning process under varying electric fields was then simulated by molecular dynamic simulation. Finally, novel fibrous membranes with structured sublayers and controllable morphologies were designed, prepared, and compared. The achieved structured membranes demonstrate a high water vapor transmission rate (WVTR) > 17.5 kg/(m2 day), a good air permeability (AP) > 5 mL/s, a high water contact angle (WCA) up to 151°, and a high hydrostatic pressure of 623 mbar. The disclosed science and technology in this article can provide a feasible method to not only adjust micro/nanostructure fibers but also to design secondary multilayer structures. This research is believed to assist in promoting the diversified development of advanced fibrous membranes and intelligent protection.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2022
·
IF 5.141
Jiaxin Ye,Na Li,Xiao-Feng Wang,Ritsuko Fujii,Yumiko Yamano,Shin-ichi Sasaki
Photosynthetic pigment-based biosolar cells (BSCs) have attracted much attention over the past few years in the field of artificial photosynthesis . To further improve the power conversion efficiency (PCE) of chlorophyll (Chl)-based bilayer BSCs, co-sensitization effects of three carboxylated chromophores , methyl trans -3 2 -carboxy-pyropheophorbide- a ( H 2 Chl-1 ), methyl 7-deformyl-7-( trans -carboxyethenyl)-pyropheophorbide- b ( H 2 Chl-2 ), and β -apo-8′-carotenoic acid ( Car ) were investigated as H 2 Chl-1 : H 2 Chl-2 , H 2 Chl-1 : Car , and H 2 Chl-2 : Car combinations. The homogeneously co-sensitized mesoporous TiO 2 ( m -TiO 2 ) layer (TiO 2 – H 2 Chl : Car ) serves as the photoactive and electron extraction layer, while a Chl- a derivative, zinc methyl 3-devinyl-3-hydroxymethyl-pyropheophorbide- a ( ZnChl ) forms J -type self-aggregation film and acts as electron donor layer. The light absorption and electron injection efficiency of the TiO 2 sensitized H 2 Chl-1 : Car blends are better than those of other types of co-sensitization after optimizing the blend ratio of each type. The electron absorption spectrum of TiO 2 –( H 2 Chl-1 : Car ) at the best mass ratio of 10:3 (molar ratio of 12:5) showed wider absorption band in 350–450 nm region compared to the spectrum of sole TiO 2 –( H 2 Chl-1 ). The charge transfer resistance was significantly reduced when TiO 2 –( H 2 Chl-1 : Car ) was applied for BSCs. The best PCE of 2.13% was achieved using TiO 2 –( H 2 Chl-1 : Car = 10:3), which corresponds to 40% increase of PCE compared to the device using TiO 2 –( H 2 Chl-1 ) without Car .
研究领域:
植物学
·
生物物理学
·
可再生能源
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Hai-Lian Wang,Hao-Ran Li,Yi-Chi Zhang,Wen-Tao Yang,Zheng Yao,Ren-Jun Wu,Cong-Wei Niu,Yong-Hong Li,Jian-Guo Wang
In the present study, we have designed and synthesized a series of 42 novel sulfonylurea compounds with ortho-alkoxy substitutions at the phenyl ring and evaluated their herbicidal activities. Some target compounds showed excellent herbicidal activity against monocotyledon weed species. When applied at 7.5 g ha–1, 6–11 exhibited more potent herbicidal activity against barnyard grass (Echinochloa crus-galli) and crab grass (Digitaria sanguinalis) than commercial acetohydroxyacid synthase (AHAS; EC 2.2.1.6) inhibitors triasulfuron, penoxsulam, and nicosulfuron at both pre-emergence and postemergence conditions. 6–11 was safe for peanut for postemergence application at this ultralow dosage, suggesting that it could be considered a potential herbicide candidate for peanut fields. Although 6–11 and triasulfuron share similar chemical structures and have close Ki values for plant AHAS, a significant difference has been observed between their LUMO maps from DFT calculations, which might be a possible factor that leads to their different behaviors toward monocotyledon weed species.
研究领域:
植物学
·
农业科学
✓ 已验证
DOI
PubMed
高影响因子
Desalination and Water Treatment
·
2016
·
IF 1.272
Fengxiao Ren,Randi Zhang,Wenzhan Lu,Tong Zhou,Runping Han,Shusheng Zhang
It is essential and important to remove chlorophenols from solution. The natural phoenix tree leaf (NTL) was modified by a cationic surfactant, hexadecylpyridinium chloride monohydrate (CPC), and applied as an adsorbent (modified phoenix trees’ leaf (MTL)) to enhance the capability to remove 2,4-dichlorophenol in aqueous solutions. Analysis of elemental composition, SEM and FTIR indicated that CPC was adsorbed on the surface of NTL. 2,4-dichlorophenol (2,4-DCP) was selected as adsorbate and the adsorption experiments were carried out in batch mode. Effects of physical–chemical parameters such as solution pH, coexisted salt, and contact temperature were investigated. The optimum pH was 6.3 and the effect of salt concentration is not significant. The adsorption quantity was up to 188.8 mg g−1 at experimental condition. The equilibrium adsorption data were fitted adequately to Freundlich and Henry isotherms, and the corresponding constants were calculated for these models. In addition, the adsorption kinetic data were analyzed using the pseudo-first-order and pseudo-second-order kinetic equations. The results showed that the pseudo-second-order model was better to fit the experimental data, which indicated that the adsorption of 2,4-DCP was controlled predominantly by a chemical adsorption process. Thermodynamic study suggested that the adsorption of 2,4-DCP on CPC–MTL was an endothermic process. Furthermore, the adsorbed 2,4-DCP was desorbed effectively up to 83% and the exhausted adsorbent could be regenerated and reused, making the adsorption process more feasible and economical. The results indicated that MTL can be used as an efficient adsorbent for the removal of 2,4-DCP from aqueous solutions.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
Food Biophysics
·
2022
·Vol. 17
·期 3
·386-396
·
IF 3.34
Wang Yuhang,Fu Yuying,McClements David Julian,Ba Chujie,Li Teng
Propolis is a natural bioactive compound that is being explored as a nutraceutical because of its potential health benefits. In this study, propolis-loaded biopolymer nanoparticles were fabricated from folic acid-modified carboxymethyl chitosan (FA-CMCS) using the pH-driven method. The mean diameter of the propolis-loaded FA-CMCS nanoparticles was about 180 nm, and transmission electron microscopy showed they had a spherical shape. Fourier transform infrared spectroscopy analysis demonstrated that hydrogen bonding, electrostatic, and hydrophobic interactions were the major driving forces responsible for nanoparticle formation. The nanoparticles had good colloidal stability at pH 2.0, 3.0, 7.0, and 8.0 but exhibited some aggregation at intermediate pH values. The nanoparticles were also stable to salt addition up to 400 mM NaCl. Propolis-loaded FA-CMCS nanoparticles exhibited improved antioxidant properties compared to pure propolis and propolis-free nanoparticles. A simulated digestion model (fed state conditions) indicated that different amounts of propolis were released in different gastrointestinal regions: around 25%, 15%, and 25% in the stomach, small intestine, and colon, respectively. Our results suggest that the nanoparticles fabricated in this study have potential as colloidal delivery systems for sustained release of propolis in the human gut.
研究领域:
药剂学
·
生物材料
·
营养学
✓ 已验证
DOI
高影响因子
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
·
2021
·
IF 5.279
Haibo Pan,Yi Wang,Xinlei Xu,Ziqi Qian,Huan Cheng,Xingqian Ye,Shiguo Chen
Biorefineries of polyphenols from plant leaves maximize their commercial value for developing biomedicines and nutrients. However, condensed tannins (CTs) constitute extensive polyphenols from plant leaves, which hinders the maximization due to extremely low bioavailability. Therefore, a simple, and sustainable one-step method was established to simultaneously extract polyphenols and depolymerize CTs with only endogenous flavan-3-ols from Chinese bayberry leaves via acid catalysis, which markedly improved the bioavailability of total polyphenols. Afterward, purification of polyphenols from depolymerized extract was studied with specific polymeric resins. Silica C18 showed the highest absorption efficiency of total polyphenols, while Amberlite XAD-7 and XAD-2 presented high selectivity toward polyphenols with high and low molecular weight, respectively. Combined depolymerization of CTs and purification with Amberlite XAD-2 showed the highest bioavailability and cellular free-radical scavenging activity of total polyphenols, which proved to be an ideal methodology for improving the bioavailability and activity of polyphenols from plant leaves.
研究领域:
植物化学
·
食品科学
·
药物开发
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）