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Bacterial microbiota and metabolic characteristics of traditional Zhangjiajie Jiuqu aromatic ester vinegar in China

FOOD BIOSCIENCE 2023年第3期53卷 1791-1801页

作者： Sun, Yue Zuo, Xinyu Luo, Rui Dang, Na Shi, Di Liu, Wenjun inner mongolia agr univ Key Lab Dairy Biotechnol & Engn Minist Educ Hohhot 010018 Peoples R China inner mongolia agr univ Key Lab Dairy Prod Proc Minist Agr & Rural Affairs Hohhot 010018 Peoples R China inner mongolia agr univ Inner Mongolia Key Lab Dairy Biotechnol & Engn Hohhot 010018 Peoples R China inner mongolia agr univ Collaborat Innovat Ctr Minist Educ Lact Acid Bacte Hohhot 010018 Peoples R China

Aged vinegars are popular acidic condiments worldwide, used for their flavour and nutritional value;they also have a rich microbial diversity. This study combined the ultra-performance liquid chromatography-quadrupoletime of flight mass spectrometry (UPLC-Q-TOF-MS) technology with Pacific Biosciences (PacBio) single-molecule real-time (SMRT) sequencing to analyze the microbial population and associated metabolism in six traditional Zhangjiajie Jiuqu aromatic ester vinegars (JAEVs) in China. A total of 265 species and subspecies from 170 bacterial genera and 14 phyla were identified;among these Lactococcus lactis (18.23%) and Acinetobacter johnsonii (17.18%) were the predominant species. A total of 1352 metabolites were detected in the metabolomes of all samples. In addition, occurrence of 40 metabolites detected were significantly different among six samples. Based on correlation analyses between the prevalent bacterial species and main differentially recorded metabolites, we conclude that there were significant correlations (P < 0.05) between 20 metabolites and five bacterial species. Limosilactobacillus fermentum and Hyphomicrobium zavarzinii were the main regulatory strains caused differential metabolites. Some potential functional metabolites were also identified, mainly chlorogenic acid and trans-piceid. This study revealed the relationship between the unique flavour of JAEVs and the microbial community, and provided a basis for industrial production of traditional aged vinegar.

关键词： Aged vinegar Bacterial microbiota Metabolites PacBio SMRT UPLC-Q-TOF Correlation analysis

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Comparative Analysis on Microstructure and Mechanical Properties between EBW and TANDEM Welding of 7A52 Aluminum Alloy Joint

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稀有金属材料与工程 2011年第S4期40卷 68-73页

作者： Zhai Xiwei1,2,Chen Furong1,2,Bi Liangyan1,2,Zhang Chuanchen3 1College of Materials Science and Engineering,inner mongolia university of technology,Hohhot 010051,China2Key Laboratory of Materials Processing & Control Engineering of inner mongolia Autonomous Region,Hohhot 010051,China3School of Materials Science and Engineering,university of Science and technology Beijing,Beijing 100083,China inner mongolia univ technol Coll Mat Sci & Engn Hohhot 010051 Peoples R China Key Lab Mat Proc & Control Engn inner mongolia Au Hohhot 010051 Peoples R China univ Sci & technol Beijing Sch Mat Sci & Engn Beijing 100083 Peoples R China

The plates with 20mm thickness of 7A52 aluminum alloy were welded by electron beam welding and TANDEM welding with ER5356 filler,*** microstructure and mechanical properties of the joints were *** results showed that the microstructure of EBW metal was finer and tighter than TANDEM *** heat-affected zone of the EBW joint was narrower,its hardness was higher and the tensile strength improved obviously compared to TANDEM *** quality control of the EBW joint was made without abnormal porosity,inclusions and ***,the EBW joint of 7A52 aluminum alloy showed excellent performance.

关键词： 7A52 aluminum alloy electron beam welding TANDEM welding microstructure mechanical properties

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Effects of Mg on Mechanical Properties of 35CrNi3MoV Steel

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Journal of Materials Science & technology 1998年第2期14卷 104-108页

作者： Yu, Yueguang Fu, Jie Wang, Anren Chen, Boping Sun, Wenshan univ Sci & technol Beijing Beijing 100083 Peoples R China inner mongolia Metall Mat Res Inst Baotou 014034 Peoples R China

The results show that Mg has less effect on the tensile properties and hardness of the steel at room temperature, but a right amount of Mg improves impact and fracture toughness and decreases the fracture-transition temperature considerably due to inclusions modification, as well as prolongs the notch stress rupture life dramatically through strengthening grain boundary and modifying boundary carbides. There is an optimum Mg content, which is about 0.0030% in the experimental 35CrNi3MoV steel. (Edited author abstract) 8 Refs.

关键词： Steel

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Inclusion Modification with Mg Treatment for 35CrNi3MoV Steel

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Journal of Materials Science & technology 1998年第1期14卷 53-56页

作者： Fu, J Yu, YG Wang, AR Chen, BP Sun, WS univ Sci & technol Beijing Beijing 100083 Peoples R China inner mongolia Met Mat Res Inst Baotou 014034 Peoples R China

The effects of Mg on the inclusion characteristics of 35CrNi3MoV steel have been studied. The results show that Mg treatment reduces obviously the amount of inclusion in the steel. Magnesium and oxygen in liquid steel form dispersed fine particles of MgO, to which other oxides or sulphides nucleated at heterogeneity and grown during solidification. In this way the inclusions are modified. The small spherical inclusions containing MgO have been observed in the Mg treated steel in contrast to the large angular inclusions with Al2O3 in the conventional steel. Especially the elongated MnS inclusion is replaced by small MgS . MgO or MgS. MnS . MgO complex inclusion. The formation of inclusions have been discussed.

关键词： Steel metallurgy

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Improving 'Nanguo' pear fungal disease and storability by chitosan coating combined with diepoxy-poly (ethylene glycol)

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FOOD BIOSCIENCE 2023年第3期53卷 2907-2917页

作者： Yan, Xirui Dong, Tungalag Yun, Xueyan Tanaka, Fumihiko Tanaka, Fumina Wardana, Ata Aditya Meng, Fanze technol inner mongolia agr univ Coll Food Sci 306 Zhaowuda Rd Hohhot 010018 Inner Mongolia Peoples R China Kyushu univ Grad Sch Bioresource & Bioenvironm Sci 744 MotookaNishi Ku Fukuoka Fukuoka 8190395 Japan Kyushu univ Fac Agr Lab Postharvest Sci W5-874744 MotookaNishi Ku Fukuoka Fukuoka 8190395 Japan univ Coll Dublin Dublin Ireland Bina Nusantara univ Fac Engn Food Technol Dept Jakarta 11480 Indonesia

A protective coating can aid in reducing mechanical harm to food during harvesting, handling, and trans-portation, resulting in fewer bruises, wounds, and other injuries, thereby improving the overall quality of the produce. In this study, coatings with 1% (w/v) chitosan (CS) and 0.6% (w/v) diepoxy-polyethylene glycol (PEG) were prepared by the co-blending method. According to the findings, increasing the PEG concentration enhanced the moisture content, water vapor permeability, and contact angle properties. In addition, when viewed by scanning electron microscopy (SEM), the morphology of the films containing more PEG appeared rougher and denser. In addition, at room temperature, the freshness of 'Nanguo' pears and the antifungal efficacy of the coating against Penicillium italicum (P. italicum) and Botrytis cinerea (B. cinerea) were evaluated. According to the findings, the weight loss or total soluble solids of pears coated with CS or PEG did not differ significantly during storage. The fruit respiration rate and ascorbic acid (AA) and malondialdehyde (MDA) contents were maintained after coating CS insertion with PEG. The CS-PEG composite coating successfully inhibits the growth of P. italicum and B. cinerea (P. italicum > B. cinerea), according to an in vitro antifungal activity assay that was improved by adding PEG. According to principal component analysis (PCA) results, the CS-PEG coating significantly impacts pear sensory evaluation and firmness. At room temperature, the shelf life of pears with a CS-PEG coat has been extended from 15 days to 25 days.

关键词： Cross-linked Antifungal Pear shelf life Biomaterial Coating preservation

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Adaptive sliding mode control of petrochemical flare combustion process based on radial basis function network

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CHINESE JOURNAL OF CHEMICAL ENGINEERING 2024年第12期76卷 318-326页

作者： Liu, Jiahui Guo, Nan Peng, Yixin Li, Wenlu Qiao, Junfei Gao, Xiaolong Xiong, Wei Beijing univ technol Fac Informat Technol Beijing 100124 Peoples R China Beijing Lab Smart Environm Protect Beijing 100124 Peoples R China Minist Educ Engn Res Ctr Intelligent Percept & Autonomous Cont Beijing 100124 Peoples R China Baotou Reclaimed Water Resources & Sewage Treatmen Baotou 014000 Inner Mongolia Peoples R China Baotou Water Grp Baotou 014000 Inner Mongolia Peoples R China

Steam-assisted combustion elevated flares are currently the most widely used type of petrochemical flares. Due to the complex and variable composition of the waste gas they handle, the combustion environment is severely affected by meteorological conditions. Key process parameters such as intake composition, flow rate, and real-time data of post-combustion residues are difficult to measure or exhibit lag in data availability. As a result, the control methods for these flares are limited, leading to poor control effectiveness. To address this issue, this paper proposes an adaptive sliding mode control method based on the radial basis function (RBF) network. Firstly, the operational characteristics of the petrochemical flare combustion process are analyzed, and a control model for the combustion process is established based on carbon dioxide detection. Secondly, an RBF neural network-based unknown function approximator is designed to identify the nonlinear part of the actual operating system. Finally, by combining the control model of the petrochemical flare combustion and designing the RBF sliding mode controller with its adaptive control law, fast and stable control of the flare combustion state is achieved. Simulation results demonstrate that the designed control strategy can achieve tracking control of the petrochemical flare combustion state, and the adaptive law also accomplishes system identification. (c) 2024 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

关键词： Petrochemical torch combustion process Sliding mode control RBF neural network System identification Fast response

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A new criterion of rock burst proneness based on residual energy release rate index

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JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 2024年第12期16卷 5004-5026页

作者： Chen, Guangbo Zhang, Jing Tang, Wei Li, Tan Zhang, Guohua inner mongolia univ Sci & technol Sch Min & Coal Baotou 014010 Peoples R China Shandong univ Sci & technol Coll Energy & Min Engn Qingdao 266590 Peoples R China Heilongjiang univ Sci & technol Sch Min Engn Harbin 150022 Peoples R China

The natural property of rock material, whether impact occurs, is the key influencing factor of the occurrence of rock burst disaster. To accurately assess rock burst proneness, this study focuses on typical sandstone as the research object. Uniaxial cyclic loading and unloading tests were conducted to measure the elastic strain energy accumulated in sandstone under different stress levels and a relationship between elastic strain energy and stress level was established. The results show that: (1) The peak stress under cyclic loading and unloading conditions is slightly lower than the uniaxial compressive strength. With an increase in the number of cycles, the internal damage of sandstone continues to accumulate, and the mechanical properties such as compressive strength continue to deteriorate;(2) With an increase in stress, the input strain energy, elastic strain energy, and dissipated strain energy also increase;(3) When the stress is low, the increase in elastic strain energy is large and shows a steady growth;with an increase in stress, the increase of elastic strain energy decreases;(4) The square of stress at any time has a good linear relationship with elastic strain energy. According to the relationship obtained from the test, the elastic strain energy at the peak stress time can be obtained;(5) A new criterion for assessing rock burst proneness is proposed: residual energy release rate index W-T, which characterizes the energy release per unit time when the rock burst occurs. The intervals for evaluating the rock burst proneness of the residual energy release rate index W-T are as follows: W-T 2, indicating strong rock burst proneness;and (6) The rationality of the proposed residual energy release rate index W-T is verified by the multi-index method and the multi-sample method, and the proposed resid

关键词： Energy storage law Rock burst proneness Rock-burst criterion Elastic strain energy Residual energy release rate Rationality verification

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Studies on nutritional intervention of ginkgo starch-lauric acid complex in obese rats induced by a high-fat diet

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FOOD BIOSCIENCE 2023年第3期53卷 1594-1602页

作者： Li, Dan Zhang, Xinyue Meng, Xiangxing Zhang, Nan Li, Jing Wang, Tianxin Gao, Shan Liu, Suwen Wang, Jilite Wang, Hao Tianjin univ Sci & technol TUST State Key Lab Food Nutr & Safety Tianjin 300457 Peoples R China Hebei univ Sci & technol Coll Biosci & Bioengn Shijiazhuang 050000 Peoples R China Hebei Normal univ Sci & technol Coll Food Sci & Technol Qinhuangdao 066004 Hebei Peoples R China Hetao Coll Dept Agr Bayannur Inner Mongolia Peoples R China

Ginkgo starch was frequently used in food, but consuming too much of it could increase postprandial blood sugar and potentially cause obesity. Through molecular docking, we discovered that lauric acid enters the spiral cavity formed by amylose molecules to form a stable compound. The compound exhibited a V-type structure, enhanced relative crystallinity, short-range order, and long-range order, while also experiencing a 20% reduction in in vitro digestibility. The complex may also lessen body weight, serum triglyceride (TG) and total cholesterol (TC) levels in rats, as well as improve hepatic fat accumulation and intestinal flora composition. It's interesting to note that the complex greatly boosted the number of good bacteria in rats, and that these bacteria positively connected with the production of short-chain fatty acids (SCFAS), superoxide dismutase (SOD), TC, and TG. In conclusion, the high-fat diet-induced obesity is significantly improved by the ginkgo starch-lauric acid combination (GSL).

关键词： Ginkgo starch Fatty acid Intestinal flora Biochemical indices Obese rats

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Synthesis and Characterization of Sm_xGd_yCe_(1-x-y)O_(2-δ) Nanopowders

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Journal of Materials Science & technology 2005年第1期21卷 131-134页

作者： Xiwen SONG, Yongwang ZHAO, Zhefeng WANG, Jun PENG,Wenguang ZHAO and Shengli AN School of Materials Science and Engineering, inner mongolia university of Science and technology, Baotou 014010, China School of Metallurgical and Ecological Engineering, university of Science and technology Beijing, Beijing 100083, ChinaAssoc. Prof. Sch. of Mat. Sci. and Eng. Inner Mongolia Univ. of Sci. Baotou 014010 China Sch. of Metall. and Ecological Eng. Univ. of Sci. and Technol. Beijing Beijing 100083 China

SmxGdyCe1-x-yO2-δ (x+y=0.2 and x=0, 0.04, 0.08, 0.12, 0.16, 0.2) nanopowders were prepared by a copre-cipitation method. The zeta potential and sedimentation volume of Ce(OH)4 aqueous dispersions at different pH values were measured. The isoelectric point (IEP) of Ce(OH)4 suspensions is 7.0. The maximum potential value of -18.5 mV and maximum sedimentation volume of 19 ml are reached at pH=10. The evolution behaviors of the xSm(OH)3·yGd(OH)3·(1-x-y)Ce(OH)4 dried powders in the heating process was characterized by DTA/TG and XRO. The powders decompose to ceria based solid solution at a temperature below 300℃ and forms cubic fluorite structure ceria at about 650℃. The properties of SmxGdyCe1-x-yO2-δ solid solutions were characterized by XRD, TEM and BET. The lattice parameter of doped Ce02 increases linearly with increasing Sm3+ substitution (or decreasing Gd3+ substitution). The particle size of the doped ceria powders is from 5 nm to 10 nm.

关键词： Coprecipitation Sm2O3 Gd2O3 Doped Ceria Nano-powders

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Protein corona formed on the TiO2 nanoparticles promotes the hydrolysis of collagen in simulated gastrointestinal fluids

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FOOD BIOSCIENCE 2023年第3期53卷 2616-2625页

作者： Chen, Yulun Liu, Qingrun Yu, Hang Guo, Yahui Cheng, Yuliang Qian, He Xie, Yunfei Yao, Weirong Jiangnan univ State Key Lab Food Sci & Technol 1800 Lihu Ave Wuxi 214122 Jiangsu Provinc Peoples R China inner mongolia univ Engn Res Ctr Dairy Qual & Safety Control Technol Minist Educ 235 Daxue West Rd Hohhot 010021 Inner Mongolia Peoples R China Jiangnan univ Sch Food Sci & Technol 1800 Lihu Ave Wuxi 214122 Jiangsu Provinc Peoples R China Jiangnan univ Joint Int Res Lab Food Safety 1800 Lihu Ave Wuxi 214122 Jiangsu Provinc Peoples R China

Titanium dioxide nanoparticles (TiO2 NPs) could interact with proteins in foods and gastrointestinal fluids, thus changing the properties and functions of proteins. Many research articles have only studied the interactions between TiO2 NPs and digestive enzymes or the gastrointestinal fate of TiO2 NPs without considering the effect of food matrix. Therefore, the interactions between TiO2 NPs and trypsin and its effects on the digestion of collagen in vitro were investigated. Results showed that the functionalization of amino acids (Asp, and Ser) significantly harmed the adsorption of trypsin by TiO2 NPs. The fluorescence quenching and isothermal titration calorimetry confirmed that the hydrogen bond and van der Waals force played an essential role in the interactions between TiO2 NPs and trypsin. The & beta;-sheet content of trypsin bound to TiO2 NPs decreased from 52.40% to 50.73% while the random coil content increased from 20.20% to 22.63%. Binding sites were identified by molecular docking. Additionally, the digestibility of collagen was improved in vitro in the presence of TiO2 NPs analyzed by SDSPAGE, hydroxyproline quantification, and the antioxidation of digested products. Hydroxyproline concentration increased by nearly 25% and ABTS radical scavenging rate increased by 50%. This study provides a new insight into the impact of nanoparticles on gastrointestinal digestion.

关键词： TiO 2 nanoparticles Protein corona Gastrointestinal digestion

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