Fermentation-Basel
·
2023
·Vol. 9
·期 8
·756
·
IF 3.7
Peng Du,Yingqi Li,Chenrui Zhen,Jia Song,Jiayi Hou,Jia Gou,Xinyue Li,Sankuan Xie,Jingli Zhou,Yufeng Yan,Yu Zheng,Min Wang
Polyphenols are important functional substances produced in the acetic acid fermentation (AAF) of Shanxi aged vinegar (SAV). Previous studies have shown that the metabolic activity of microorganisms is closely related to polyphenol production and accumulation. In this study, microorganisms in the AAF of SAV were analyzed to explore how to increase the polyphenol yield by changing the microorganisms and reveal the potential mechanism of the microbial influence on the polyphenol yield. Macrotranscriptome analysis showed that acetic and lactic acid bacteria dominated the AAF fermentation process and initially increased and decreased. Spearman correlation analysis and verification experiments showed that the co-addition ofAcetobacter pasteurianusandLactobacillus helveticuspromoted the accumulation of polyphenols, and the total polyphenol content increased by 72% after strengthening.Keywords:Shanxi aged vinegar;polyphenols;acetic acid fermentation;microbial enhancement;Acetobacter pasteurianus
研究领域:
食品科学
·
微生物学
·
生物化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Hui Zhang,Song Xu,Xinyu Zhang,Mengting Ma,Zhongquan Sui,Harold Corke
The multi-scale structure changes of five underutilized starches, including waxy proso millet (PMS) and amaranth (AS) starches, non-waxy foxtail millet (FMS), buckwheat (BS) and oat (OS) starches, were investigated after modification with acetic anhydride (0.0165 mol) and vinyl acetate (0.0165 mol). Five starches exhibited a higher proportion of short chains compared to waxy and normal maize starches. Degree of substitution (DS) of acetylated starches ranged 0.03 to 0.08. Vinyl acetate modified non-waxy starches showed higher DS values than waxy starches, while acetic anhydride modified waxy starches exhibited higher DS values than non-waxy starches. Vinyl acetate reduced relative crystallinity (RC) by 1.3 % in PMS, 5.7 % in FMS, and 12.5 % in OS, whereas acetic anhydride did not significantly decrease RC for AS, FMS, BS and OS. For the non-waxy starches, gelatinization enthalpies after vinyl acetate modification were 4–22 % lower than after acetic anhydride modification. Additionally, the increase in amorphous lamellae thickness (da) of PMS, AS, BS and OS was greater with vinyl acetate than acetic anhydride, indicating that vinyl acetate more effectively disrupted crystalline lamellae. Overall, the presence of amylose influenced DS of modified starches. However, change of supramolecular structure was independent of DS but dependent on the acetylation reagent.
研究领域:
食品科学
·
高分子化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF FOOD COMPOSITION AND ANALYSIS
·
2025
·
IF 4.6
Ying Sun,Dong Wei,Ziming Huang,Jinyao Song,Yiyang Zhang,Yueting Zhou,Bingbing Wang,Can Wang,Jing Wang,Hao Zhang
The inhibitory activity of different ultrafiltration fractions derived from the water-soluble extract of Zhenjiang aromatic vinegar (ZAV) on angiotensin-converting enzyme (ACE) was evaluated, and endogenous peptides with potential ACE inhibition were screened through ultrafiltration and reversed-phase high-performance liquid chromatography (RP–HPLC) coupled with ACE inhibition detection. Several novel ACE inhibitory peptides were identified using a peptidomic approach based on nanoLC-MS/MS. A total of 710 peptides were identified in the RP–HPLC fractions. Additionally, four novel peptides with potential ACE inhibitory activity were identified: FPEQPP, VVPPGHPV, FPPQQP, and YGRGPIE, with IC 50 values of 3.7 ± 0.1 μM, 3.3 ± 0.4 μM, 1.6 ± 0.2 μM, and 5.9 ± 0.2 μM, respectively. Of these novel peptides, FPPQQP was the peptide with the most potent antihypertensive activity, which acted as a strong inhibitor of ACE through molecular docking. These findings suggest that integrating peptidomics and molecular docking provides an efficient strategy for the rapid investigation of ACE inhibitory peptides in food matrices.
研究领域:
食品科学
·
生物化学
·
药理学
✓ 已验证
DOI
高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2020
·
IF 4.244
Xiaohui Guo,Yingjuan Fu,Fawei Miao,Quanshui Yu,Na Liu,Fengshan Zhang
Thermal acetic acid/sodium acetate hydrolysis (ASH) on poplar wood chips were carried out to obtain functional xylooligosaccharide, then the hydrolyzed wood chips were subjected to kraft pulping (KP) to fractionate cellulose and lignin. The separated three fractions were extensively characterized for further utilization in view of the integral biorefinery concept. The extraction efficiency of hemicelluloses by ASH strongly depends on the buffer ratio of the acetic acid/sodium acetate buffer solution. The ASH facilitated producing a high ratio of xylooligosaccharides with high molecular weight, while prevented further degradation of the saccharides, and simultaneously inhibited the condensation of lignin facilitating the subsequent kraft delignification. The obtained cellulose pulps had higher intrinsic viscosities as compared with the traditional autohydrolysis-KP process. Moreover, the ASH-KP process delivered a high purity of lignin with relatively high molecular weight. Therefore, the proposed integrated fractionation strategy is conducive to convert the lignocellulosic components into bio-based functional materials.
研究领域:
林业工程
·
生物炼制
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2019
·
IF 8.355
Minhua Zhang,Jianyu Zhuang,Xingyu Wu,Yingzhe Yu
In the actual vinyl acetate production process, benzene is a very harmful by-product for the quality of the product. In this work, the experimental method and DFT method are combined to study how the by-product benzene is produced during the production of vinyl acetate by acetylene gas-phase. The catalysis of zinc acetate/activated carbon catalyst is the main reason for the formation of benzene from acetylene. Acetic acid can reduce the formation of benzene. The reaction pathway CHCH + CHCH → CHCHCHCH, CHCHCHCH + CHCH → C 6 H 6 is the most probable reaction path of acetylene to benzene. Acetylene can generate benzene through a two-step elementary reaction. The activation barrier is 0.25 eV and 0.86 eV, respectively. Acetic acid has a stronger adsorption at the active site than acetylene. The competitive adsorption of acetylene and acetic acid is an important reason why acetic acid can reduce acetylene to benzene.
研究领域:
化学工程
·
催化反应
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
LWT-FOOD SCIENCE AND TECHNOLOGY
·
2022
·
IF 6.056
Chunfeng Chen,Shenqun Wu,Yuren Li,Youyi Huang,Xiaoping Yang
This study intends to produce a black tea vinegar (BTV) from low-quality bulk black tea in order to increase its consumption and added value, and to benefit from its functional characteristics. Three strains ( Acetobacter sp. GDMCC1.152, Acetobacter pasteurianus GDMCC1.67, and Acetobacter aceti ATCC15973) of acetic acid bacteria (AAB) were inoculated into black tea infusion (BTI) with ethanol to produce BTV, and their effects on bioactive compounds, antioxidant activity, and volatile compounds in the vinegars were revealed. The results showed that the three strains were suitable for the production of BTV, and the vinegar quality was the best after acetic acid fermentation for 6 days. Compared with BTI, the contents of organic acids and volatile compounds and the antioxidant activity of the vinegars increased significantly. Among them, the vinegar produced by GDMCC1.152 strain had the highest content of organic acids, tea polyphenols (TPs), thearubigins (TRs), theabrownines (TBs), and volatile compounds. It also possessed the strongest antioxidant activity and a rich taste with an apple-like aroma. In summary, AAB fermentation can effectively improve the flavor and quality of BTI and produce a new healthy product with high activity, and Acetobacter sp. GDMCC1.152 is the most suitable strain for the production of BTV.
研究领域:
食品科学
·
微生物学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Heritage Science
·
2020
·Vol. 8
·期 1
·1-9
·
IF 1.902
Jia Zhihui,Li Jing,Li Yuhu,Qi Yunpeng,Hu Daodao,Xing Huiping,Chao Xiaolian
Microbubble disease observed in cellulose acetate microfilm is accompanied by the production of vinegar syndrome, which affects the image integrity. In the present study, samples of cellulose acetate microfilm with microbubble disease were selected to investigate potential treatment methods. Samples were sourced from the Republic of China (AD 1912–1949) microfilm collections held in the Second Historical Archives of China. A combination of optical microscopy and a stainless-steel needle was used to remove plasticizer exudation within microbubbles. The plasticizer was effectively removed by infiltrating butan-1-ol into the microbubble from a small hole made by the stainless-steel needle. SEM and confocal microscopy were used to study the morphology and roughness of the internal surface of the microbubbles. It was found that the blurry image could be attributed to light scattering from the rough surface. Ethyl cellulose was used to fill the interior of the microbubble to obtain a clearer image. To determine the protective potential of this filling material, the chemical and mechanical properties of coated film after dry heat, hygrothermal and UV accelerated ageing were measured. Based on the above-mentioned results, it is encouraging that a new microrepair method and its corresponding method are offered in film treatment work.
研究领域:
文物保护
·
材料科学
·
化学
✓ 已验证
DOI
高影响因子
Food Analytical Methods
·
2018
·Vol. 12
·期 2
·544-557
·
IF 2.245
Al-Dalali Sam,Zheng Fuping,Sun Baoguo,Chen Feng
Zhenjiang aromatic vinegar is one of the most popular vinegars in China, which can be produced by either traditional or modern techniques. Aroma profiles of the traditional Zhenjiang aromatic vinegar (TZAV) and the modern Zhenjiang aromatic vinegar (MZAV) at different stages of their aging were analyzed by headspace solid-phase microextraction (HS-SPME) with an aid of DVB/CAR/PDMS fiber combined with gas chromatography-mass spectrometry (GC-MS) and gas chromatography-olfactometry (GC-O). A total of 53 volatile compounds were identified. Among them, 43 aromas were positively identified after comparison with their corresponding authentic compounds. Two volatiles, including isopentyl alcohol and butyl benzoate, were only identified in TZAV, while propiophenone was only identified in MZAV. In addition, some volatiles were found to be generated during the aging period, which included isopentyl alcohol, 3-(methylthio)propyl acetate, and 2-acetoxy-3-butanone in the TZAV samples, and 2-ethyl-1-hexanol, octanoic acid, propiophenone, and dimethyl trisulfide in the MZAV samples. The total amount of volatile compounds in the MZAV was greater than its counterpart TZAV. Moreover, 29 odor-active compounds were recognized by GC-O analysis, while 25 of them were confirmed by their authentic compounds, and their perceived odors included sweet, acid, buttery, floral, herbal, fruit, fresh, pungent, almond, and geraniol notes.
研究领域:
食品科学
·
分析化学
·
农学
✓ 已验证
DOI
高影响因子
Polymers
·
2020
·Vol. 13
·期 1
·113
·
IF 3.426
Zhihui Zhang,Zhengdong Zhao,Yujia Lu,Di Wang,Chengyu Wang,Jian Li
A CA-Eu(III) complex was synthesized by the coordination reaction of cellulose acetate (CA) and Eu3+to obtain a CA-Eu light conversion film. This product was then doped with Tb(III) to sensitize the luminescence of Eu3+, which could functionalize the CA film. FTIR and XPS showed that the oxygen atoms in C=O, C–O (O=C–O), and O–H were involved in the complexation with Eu3+and formed a Eu–O bond. SEM revealed that Eu3+filled in the pores of the CA film. By changing the experimental conditions, the best fluorescence performance was obtained at the CA: Eu3+ratio of 3:1 with a reaction time of 65 min. The energy transfer between Tb3+–Eu3+could be realized by doping Tb3+to enhance the luminescence of Eu3+. The best fluorescence performance of the CA-Eu-Tb light conversion film was at a Eu3+:Tb3+ratio of 3:1. Compared with the CA film, the light conversion film has high transparency, high tensile strength, and good flexibility. It can convert the ultraviolet light harmful to plants into red light that is beneficial to photosynthesis. This offers high efficiency and environmental protection in the field of agricultural films.Keywords:light conversion film;cellulose acetate;europium;sensitization
研究领域:
材料科学
·
农业科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2014
·
IF 2.613
Chengyun Gao,Minhua Zhang,Zhongyi Jiang,Jiayou Liao,Xianmei Xie,Tinghong Huang,Jing Zhao,Jinshuan Bai,Fusheng Pan
Novel polymer–inorganic hybrid membrane was prepared by incorporating potassium montmorillonite (K + MMT) into chitosan (CS) for the dehydration of water–acetone mixture. The morphology, chemical and physical structure, as well as the hydrophilicity were characterized. The results showed that MMT uniformly dispersed in the chitosan matrix, formed hydrogen bonds with chitosan, and enhanced the thermal stability of the film. The membrane doped with 10 wt% of K + MMT exhibited the highest performance with separation factor of 2200, which was almost 8 times higher than 249 of pristine CS membrane at 50 °C for 5 wt% of water in the feed. The results suggested that the ionized water channel constructed by MMT intergallery in the hybrid membrane could greatly enhance the separation factor of CS membrane. Moreover, a plausible model for water transportation in the CS-K + MMT hybrid membranes was proposed. The results proved that K + MMT had a potential prospect in application for pervaporation .
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2023
·Vol. 13
·期 3
·539
·
IF 3.9
Yuhao Chen,Mengli Li,Zhuang Xu,Guowang Shen,Xugeng Wang,Bin Dai
In this study, novel Zn catalysts were prepared by the wet impregnation method using printing and dyeing wastewater (PDW)-modified petroleum coke (petcoke) as a carrier, and they were applied to the acetylene acetoxylation. The pretreated petroleum coke has a high specific surface area which provides sufficient space for the loading of Zn. Calcination further increases catalyst activity, but when calcination temperatures exceed 1000 °C, a significant loss of Zn occurs, resulting in a dramatic decrease in catalyst activity. This enables the conversion of acetic acid up to 85%. X-ray photoelectron spectroscopy confirmed that a large amount of N is introduced into PC from PDW, which changes the electron transfer around Zn. Temperature-programmed desorption (TPD) analysis revealed that the nitrogen-doped Zn(OAc)2catalyst enhanced the catalytic activity by modulating the intensity of the catalyzed adsorption of acetic acid and acetylene. This study provides a new way to reuse petroleum coke and printing and dyeing wastewater to support the sustainable development of the vinyl acetate industry.Keywords:wastewater;petroleum coke;vinyl acetate
研究领域:
催化化学
·
环境科学
·
工业化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of the American Chemical Society
·
2025
·
IF 15.6
Jun Mao,Huan Liu,Yanan Li,Meng Gao,Yunlong Zhang,Yao Song,Mo Zhang,Guilan Xu,Wu Zhou,Liang Yu,Xiaoju Cui,Dehui Deng
The oriented conversion of CH4 to CH3COOH at low temperature, even room temperature, is both scientifically significant and industrially applicable for CH4 utilization, yet it is extremely challenging due to the difficulties associated with efficient CH4 activation and controllable C–C coupling. In this study, we for the first time achieve the room-temperature conversion of CH4 to CH3COOH using molecular O2 and CO over MoS2-confined Rh–Fe sites, which delivers an unprecedented CH3COOH selectivity of 90.3% and a productivity of 26.2 μmol gcat.–1 h–1 at 25 °C. Furthermore, the productivity of CH3COOH can be enhanced to 105.6 μmol gcat.–1 h–1 at 80 °C, while maintaining a high selectivity of 95.6%. Comprehensive experimental and theoretical investigation reveal the critical role of Rh–Fe synergy in the selective formation of CH3COOH. The confined Fe sites in MoS2 enable the activation of O2 to generate highly reactive Fe═O center for CH4 dissociation to CH3 species at room temperature, which then readily couple with adsorbed CO on adjacent Rh sites to form the key CH3CO intermediate for CH3COOH production. The unique structure of Rh–Fe sites offers synergistic catalytic properties that effectively balance C–H activation and C–C coupling, successfully addressing the trade-off between activity and selectivity in the carbonylation of CH4 to CH3COOH under mild conditions.
研究领域:
化学
·
催化反应
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）