FOOD CHEMISTRY
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2018
·
IF 4.946
Hongliang Zeng,Yixin Zheng,Yan Lin,Cancan Huang,Shan Lin,Baodong Zheng,Yi Zhang
The aim of this study was to investigate the proliferation effect of fractionated lotus seed resistant starch (LRS3-20%, LRS3-30%) and the structural changes following fermentation. Fractionated lotus seed resistant starch, especially LRS3-20%, promoted the proliferation of these probiotics, and Bifidobacterium longum produced large quantities of acetic acid, while Lactobacillus delbrueckii subsp. bulgaricus produced lactic acid. Additionally, the probiotics with lotus seed resistant starch (LRS3) and LRS3-20% survived more successfully in simulated gastrointestinal solutions compared to glucose, LRS3-30% and high amylose maize starch, but LRS3 and LRS3-20% differed in their abilities to enhance the tolerance to acidic buffer, bile acid and simulated gastric juice. Furthermore, after fermentation, fractionated lotus seed resistant starch displayed a loose, rough surface. The crystalline and double helical structure increased as the amount of amorphous and sub-crystalline structure reduced following fermentation. Interestingly, structural changes were correlated with the original structures and utilisation by the probiotics.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
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2018
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IF 3.909
Ang-Xin Song,Yu-Heng Mao,Ka-Chai Siu,Jian-Yong Wu
The bifidogenic effects of exopolysaccharide (EPS) of a medicinal fungus ( Cordyceps sinensis ) and a well-known food polysaccharide konjac glucomannan (KGM) with different molecular weight (MW) ranges were evaluated through in vitro experiments in liquid cultures of Bifidobacteria . Native EPS and KGM were partially degraded with power ultrasound (US) to improve the water solubility, and further hydrolysed with trifluoroacetic acid to much lower MW. The acid-hydrolysed fractions (EPS-AH and KGM-AH) supported the growth of all five tested bifidobacterial species, while the US-degraded high MW fractions, EPS-US and KGM-US, could only slightly support the growth of some species. All EPS fractions increased the acetic acid production of most bifidobacterial species. Most remarkably, the high MW EPS-US, EPS-AH and KGM-US fractions significantly enhanced the cell viability with much higher colony forming unit (CFU) counts, suggesting a protective effect of these high MW polysaccharides for the bacterial survival . The results have shown that MW was a significant factor on the bifidogenic properties of partially degraded EPS and KGM.
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CHEMISTRY-A EUROPEAN JOURNAL
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2018
·Vol. 24
·期 12
·2962-2970
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IF 5.16
Pengfei Yang,Fangxin Mao,Yongsheng Li,Qixin Zhuang,Jinlou Gu
Graphical Etch a sketch : A simple and efficient monocarboxylic acid etching (MAE) strategy was developed to prepare hierarchical porous UiO-66, which inherits excellent stability from its parent material and the pore parameters can be controlled by adjusting the monocarboxylic acid concentration and reaction temperature. A new monocarboxylic acid etching (MAE) strategy was developed for transforming chemically stable Zr-based metal-organic frameworks (MOFs) of UiO-66 to their hierarchical porous counterpart. The key design element was based on the incomplete replacement of bridging ligands in MOFs by monocarboxylic acids (MAs), leading to the departure of partial ligands and metal clusters to create mesopores in MOFs. A series of MAs with different acidity and carbon chain length were tested, and propionic acid (PA) was screened to be the suitable choice. The textural features including pore size distribution, specific surface area, and pore volume of the obtained products can be controlled by adjusting the MA concentration and reaction temperature. The obtained hierarchical porous MOFs inherited excellent stability from their parent materials. Additionally, the MAE strategy was universal to construct hierarchical porous Zr-based MOFs, and it was expanded to etch UiO-66 derivatives. The excellent adsorption behavior of the resultant hierarchical porous Zr-based MOFs over two enzymes with different size was also successfully exemplified, demonstrating their application potentials with bulky molecules involved.
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INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
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IF 3.141
Yuqi Huang,Tian Ke,Yuqi Ke,Qilong Ren,Qiwei Yang,Huabin Xing
The separation of 1,3-butadiene (1,3-C4H6) and n-butene (n-C4H8) using ionic liquids (ILs) has received great attention in recent years, but designing an industrially attractive IL that combines large solubility and high selectivity remains challenging. In this work, we prepared several tributylethylphosphonium-based carboxylate ILs featuring large free volume and strong hydrogen bonding basicities through finely tuning the structures of cations and anions for the separation of C4 hydrocarbons. These carboxylate ILs exhibited the highest mass solubility for 1,3-C4H6 yet reported (0.899 and 0.663 mmol/g in [P4442][C17H35COO] and [P4442][HCOO], respectively) and excellent 1,3-C4H6/n-C4H8 selectivity (1.83 in [P4442][HCOO]) at 308.1 K and 100 kPa, which sets a new benchmark for 1,3-C4H6/n-C4H8 separation. Qualitative relationships between the free volume/basicity and their solubility were established. Results revealed that the free volume of unit mass and basicity were positively correlated with the 1,3-C4H6 solubility. The interaction between the ILs and gases was explored by quantum chemical calculations.
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Molecular Medicine Reports
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2018
·Vol. 18
·期 5
·4349-4355
·
IF 1.922
Hangyu Tian,Dan Yu,Yan Hu,Pan Zhang,Yang Yang,Qiang Hu,Ming Li
Angiotensin II (Ang II) is a principal molecule of the renin‑angiotensin system, which promotes hypertrophy and fibrosis. It has been demonstrated that Ang II upregulates the expression of cyclophilin A (CypA), which is a potential myocardial hypertrophy factor. However, the mechanisms by which Ang II induces the expression of CypA in cardiomyocytes remain unclear. In the present study, reactive oxygen species (ROS) were detected by fluorescence microscopy, and western blot analysis and ELISA were used to measure CypA expression. It was identified that Ang II enhanced the production of ROS in rat cardiomyocytes. ROS, in turn, promoted CypA expression and secretion. Notably, the action of Ang II was primarily dependent on the angiotensin type 2 receptor (AT2R), not the type 1 receptor. These results provided an insight into the role of the AT2R signaling pathway in Ang II‑induced myocardial hypertrophy.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2019
·
IF 4.784
Mingjia Wang,Guijie Chen,Dan Chen,Hong Ye,Yi Sun,Xiaoxiong Zeng,Zhonghua Liu
One purified fraction from crude Fuzhuan brick tea polysaccharides (FBTPS), FBTPS-3, was obtained through column chromatography of DEAE Sepharose Fast Flow. The chemical properties and probiotic effects of FBTPS-3 were evaluated by fermentation in vitro . Moreover, the effects of FBTPS-3 on the function and metabolic pathway of gut microbiota were investigated by metagenomic sequencing. The results showed that FBTPS-3 was an heteropolysaccharide with molecular weight of 741 kDa, which was mainly composed of Man, Rha, GalA, Gal and Ara in molar ratio of 8.7:15.5:42.2:19.7:13.9. The contents of carbohydrates and uronic acid in FBTPS-3 were 44.78 ± 2.85% and 40.4 ± 2.11%, respectively. After fermentation, the molecular weight of FBTPS-3 and content of carbohydrates were significantly decreased, indicating that FBTPS-3 could be utilized by gut microbiota. Furthermore, the relative abundances of Bacteroides , Megasphaera and Prevotella were significantly increased by FBTPS-3. FBTPS-3 also significantly promoted the production of acetic, propionic and n-butyric acids. Based on the metagenomic sequencing, it was found that FBTPS-3 significantly enriched the metabolic pathway of starch and sucrose. All the results suggest that FBTPS-3 is expected to be developed as functional ingredients or foods to improve the host health through regulating the gut microbiota and physiological metabolic functions.
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ANALYTICAL AND BIOANALYTICAL CHEMISTRY
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2017
·Vol. 409
·期 30
·7063-7075
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IF 3.431
Wang Meng,Jiao Yang,Cheng Chunsheng,Hua Jianhao,Yang Yaling
A novel and sensitive method based on nitrogen-doped carbon quantum dots as a fluorescence probe coupled with magnetic solid-phase extraction (MSPE) purification for analysis of folic acid (FA) in human serum samples has been established for the first time. In the developed system, magnetic nanoparticles coated with hexanoic acid (Fe 3 O 4 @C 6 ) were synthesized by a one-step chemical co-precipitation method with good magnetic properties and dispersibility for sample purification, and it is better to be separated from the sample. High fluorescence nitrogen-doped carbon quantum dots (N-CQDs), simply prepared using a one-step hydrothermal method with nitrilotriacetic acid, could be selectively quenched by FA. Based on this phenomenon, a fluorescence assay was proposed for specific determination of FA. Various operational experiment parameters have been studied and optimized in detail. Under the optimum experimental conditions, the detection limit of the proposed method for FA was evaluated to be 0.5 nM (S/ N = 3), while the relative standard deviation (RSD) was 1.2% ( n = 6). Finally, the proposed method was applied for determination of trace levels of FA from human serum samples and quantitative recoveries were achieved within the range of 95.7–103.5%. All of the results showed that the proposed method had significant application in further research.
Schematic of synthesis of N-CQDs and schematic of suggested mode for analysis of folic acid (FA).
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Analytical Methods
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2024
·
IF 2.7
Hongxu Zhou,Qing Jiang,Xin He,Xian Fu,Jun-Yan Liu
Fatty acids (FAs) are essential molecules in all organisms and are involved in various physiological and pathophysiological processes. Pentafluorobenzyl bromide (PFBBr) is commonly used for FAs derivatization for gas chromatography-mass spectrometry (GC–MS) quantification by chemical ionization (CI). While CI is the conventional ionization mode for PFBBr derivatization, electron ionization (EI) source has also demonstrated efficacy in achieving satisfactory analytical performance for the analysis of PFB esters. In this study, we present a novel approach utilizing PFBBr-derivatization on a GC-EI-MS platform to quantitatively analyze a comprehensive range of 44 fatty acids (FAs) spanning from C2 to C24. The method's sensitivity, precision, accuracy, linearity, recovery, and matrix effect were rigorously validated against predetermined acceptance criteria. In comparison to the conventional CI ionization mode, the utilization of PFBBr-derivatization in GC-EI-MS exhibits a wider range of applications and achieves comparable sensitivity levels as the conventional CI platform. By using this method, we successfully quantified the 44 FAs in plasma and feces samples from the mice with deoxynivalenol (DON)-induced kidney injury. Among these, the levels of most FA species were increased in the DON-exposure group compared with the control group. The orthogonal partial least squares discriminant analysis (OPLS-DA) of all the tested FAs showed a visual separation of the two groups, indicating DON exposure resulted in a disturbance of FA profile in mice. These results indicate that the established method by integration of GC-MS with PFBBr derivatization is an efficient approach to quantify the comprehensive FA profile, which includes short-, medium- and long-chain FAs. In addition, our study provides new insights into the mechanism underlying DON exposure-induced kidney injury.
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FOOD CHEMISTRY
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2024
·
IF 8.5
Xinmiao Wang,Qian Wang,Dong Cai,Jinghan Yu,Xuan Chen,Xu Guo,Peiyong Tong,Xiaoyang Liu,Fawen Yin,Dayong Zhou
HPLC-UV analysis was used to evaluate the enzymatic degradation characteristics of tyrosol acyl esters (TYr-Es) and alkyl gallates (A-GAs). Among various hydrolytic enzymes, TYr-Es can be hydrolyzed by pancrelipase, while A-GAs cannot be hydrolyzed by pancrelipase. Interestingly, carboxylesterase-1b (CES-1b), carboxylesterase-1c (CES-1c) and carboxylesterase-2 (CES-2) are able to hydrolyze TYr-Es and A-GAs, and thus to liberate tyrosol (TYr) and gallic acid (GA). By contrast, the degrees of hydrolysis (DHs) of TYr-Es and A-GAs by CES-1b and CES-1c were significantly higher than those by CES-2. Meanwhile, the DHs of TYr-Es were much higher than those of A-GAs. Especially, the DHs firstly increased and then decreased with the increasing alkyl chain length. Besides, DHs positively correlated with the unsaturation degree at the same chain length. Through regulating carbon length, unsaturation degree and the ester bond structure, controlled-release of phenolic compounds and fatty acids (or fatty alcohols) from phenolic esters will be easily achieved.
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JOURNAL OF ETHNOPHARMACOLOGY
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2024
·
IF 4.8
Zihao He,Siyuan Deng,Zhijing Wu,Zheng Cui,Hao Mei,Jinglin Wang,Kaiping Wang,Yu Zhang
Ethnopharmacological relevance Dysfunction of the intestinal barrier was an important trigger for alcoholic liver damage and alcohol had brought about intestinal damage before causing liver damage. The root of Angelica sinensis (Oliv.) Diels, crucial traditional medicinal material, was widely utilized for its blood-invigorating, intestinal-lubricating and gynecological benefits. Angelica sinensis polysaccharide (ASP) was an essential natural active ingredient of Angelica sinensis and exhibited considerable potential for gastrointestinal protection. Nevertheless, the systematic research of ASP on the gastrointestinal tract remained insufficient. Aim of this study To systematically explore the protective effect and underlying mechanisms of ASP against alcohol-induced gastrointestinal injury, including the stomach, ileum and colon. Materials and methods The AFLD mice model was established via the intragastric administration of alcohol twice a day for one week. The protective effect of ASP on the representative segments of the gastrointestinal tract (stomach, ileum and colon) was subsequently studied after confirming its hepatoprotective activity. The impact of ASP on gastrointestinal alcohol metabolism was examined to explain its antioxidant and antiapoptotic activities. Furthermore, the effect of ASP on short-chain fatty acids (SCFA) in the colon and colonic contents was investigated to further enhance the understanding of the underlying mechanisms. Results ASP could reduce oxidative stress and apoptosis in the gastrointestinal tract via regulating CYP2E1-mediated alcohol metabolism. Additionally, ASP could significantly increase the levels of FFAR2, FFAR3 and HCAR2 in colon, thereby promoting the utilization of SCFA. Conclusion ASP was proven for the first time to improve gastrointestinal damage caused by alcohol, indicating its enormous potential as a candidate medicine for the treatment of alcohol related gastrointestinal injury.
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APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Mengjie Pan,Xiaofeng Wang,Chengkai Gong,Dan Zhang,Yixing Zhao,Fan Li
Quasi two-dimensional (quasi-2D) perovskites have shown huge potential for perovskite light-emitting diodes (PeLEDs). Nevertheless, the serious non-radiative recombination induced by numerous defects in polycrystalline quasi-2D perovskite films hinders their further development. Herein, three carboxyl-based additives with different molecular configurations, i.e. butyric acid (BAC), glutaric acid (GAC) and tricarballylic acid (TAC), are adopted as passivation agents for quasi-2D PeLEDs. Benefiting from the strong coordination interaction between –COOH and perovskites, the inclusion of carboxyl-based additives can effectively optimize film morphologies, regulate the distribution of small-n phases, passivate defects and enhance film stability. With the increase of the carboxyl group number and molecular spatial dimension of carboxyl-based additives, more compact and smoother quasi-2D perovskite films, together with narrower phase distribution, lower defect density and better stability, can be obtained. Consequently, the unpacked quasi-2D PeLED treated with TAC, which is tested in the ambient air with the relative humidity of about 50 %, delivers an external quantum efficiency (EQE) of 14.21 % and prolonged operational lifetime (T 50 ) of 2160 s, while the pristine device only gives an EQE of 7.63 % and T 50 of 460 s. Our work provides guidance for boosting the performance of quasi-2D PeLEDs by rationally tailoring molecular configurations of carboxyl-based additives.
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INDUSTRIAL CROPS AND PRODUCTS
·
2025
·
IF 6.2
Han Gao,Jinliu Xiao,Yun Wang,Yunkai Yu,Junzhang Wu,Jian Zhang,Zhiwei Wang,Shuangfei Wang,Qingliu Luo
An effective, economical, and eco-friendly pretreatment of lignocellulosic biomass is crucial for advancing biorefinery as a sustainable solution to fossil fuel scarcity and to support a circular economy. This study introduces a multifunctional deep eutectic solvent (multi-DES) system, created by combining analog volatile fatty acids (analog-VFAs) as hydrogen bond donors with choline chloride, to pretreat agricultural waste (agri-waste) and facilitate the production of nano-lignocellulose materials. The multi-DES pretreatment was optimized for varying durations and temperatures, achieving a maximum lignin removal rate of 74.1 % at 150 °C over 3 h. Subsequent ball milling yielded high-quality lignocellulosic nanofibers (LCNFs) with widths ranging from 10 to 15 nm and exhibiting excellent thermal stability and mechanical properties. A life cycle assessment (LCA) confirmed the environmental benefits and practical viability of this biorefinery process. This approach effectively upgrades agri-waste into valuable LCNFs, enhancing biomass utilization with minimal environmental impact, and advancing the competitiveness of biorefineries.
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