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Impact of sourdough fermentation on nutrient transformations in cereal-based foods:Mechanisms,practical applications,and health implications

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Grain & Oil Science and Technology 2024年第2期7卷 124-132页

作者： Zhen wang luyang wang State Key Laboratory of Crop Stress Adaptation and Improvement College of AgricultureHenan UniversityKaifeng 475004China

Sourdough is often considered a healthy choice and quality improver for use in cereal production due to its unique microbial composition and fermentation *** sourdough fermentation of cereals,biotransformation of nutrients occurs,resulting in notable changes to proteins,carbohydrates,fats,vitamins,and *** nutrient undergoes specific transformations,providing various advantages for human *** undergo hydrolysis to produce small molecular weight peptides and amino acids that are more easily digested and absorbed by the human *** break down to improve the digestibility and absorption of cereals and lower the glycemic *** acids experience oxidation to produce new substances with health ***,the application of sourdough fermentation can enhance the texture,flavor,and nutritional value of cereal foods while also extending their shelf life and improving food *** conclusion,sourdough fermentation has a broad range of applications in cereal food *** research is encouraged to investigate the mechanisms and processes of sourdough fermentation to develop even more nutritious,healthy,and flavorful cereal-based foods.

关键词： Sourdough fermentation Lactic acid bacteria Proteolysis Starch hydrolysis Low-GI Nutrients

Analysis of light propagation characteristic in the aero-optic flow field of cone-headed vehicle with side window

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Optoelectronics Letters 2024年第1期20卷 58-64页

作者： XU Liang ZHOU Liye wang luyang ZHAO Shiwei wang Tao Tianjin Key Laboratory of Complex Control Theory and Application School of Electrical Engineering and AutomationTianjin University of TechnologyTianjin 300384China School of Intelligent Engineering Sun Yat-sen UniversityGuangzhou 510275China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519000China

Aero-optic imaging deviation research is carried out for infrared-guided vehicle with cone-head side window,with a focus on the propagation characteristics of light in an aero-optic flow *** the light entering the aero-optic flow field from the free-stream should be close to the normal,numerous data indicate that the light is refracted away from the *** paper divides the aero-optic flow field into two parts and uses the gas density distribution in the aero-optic flow field to propose the hypothesis that there are two modes of refraction when light propagates through the flow *** results show that light propagates from the optically denser medium to the optically thinner medium after passing through the shock wave and eventually leads to refraction away from the normal when the light enters the aero-optic flow field.

关键词： flow propagation light

High Fischer ratio oligopeptides in food:sources,functions and application prospects

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Journal of Future Foods 2024年第2期4卷 128-134页

作者： Zhen wang Xinrui Zhang luyang wang Xingqi Ou Jihong Huang State Key Laboratory of Crop Stress Adaptation and Improvement College of AgricultureHenan UniversityKaifeng 475004China Food Laboratory of Zhongyuan Luohe 462300China College of Life Science and Technology Henan Institute of Science and TechnologyXinxiang 453003China College of Biological Engineering Henan University of TechnologyZhengzhou 450001China School of Food and Pharmacy Xuchang UniversityXuchang 461000China

High Fischer ratio oligopeptides(HFROs)are a group of oligopeptides containing high levels of branched-chain amino acids(BCAA)and low levels of aromatic amino acids(AAA).HFROs have received a lot of attention as they are believed to have significant physiological activities,including antioxidant,liver damage repair,anti-fatigue,anti-tumor and energy supply to the *** are available from a wide range of sources and both plant and animal proteins can be used to prepare HFROs but the physiological tolerability and rejection of special populations needs to be *** hydrolysis is the most common method for the preparation of HFROs,but optimization of the separation and purification process is still needed in the *** caused by disruptions in the balance of BCAA and AAA in the blood,such as hepatic encephalopathy,can be treated by supplementing HFROs with drugs or *** addition,HFROs are able to reduce fatigue feedback and assist in the treatment of phenylketonuria at the molecular nutrient *** aim of this review is to review recent research on HFROs and provide new perspectives on the high value use of crops and the development of novel functional and special medical purpose foods.

关键词： Fischer ratio Oligopeptides Amino acids5- Hydroxytryptamine Phenylketonuria

Semi-volatile organic compounds in a museum in China: A non-targeted screening approach

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Science China Technological Sciences 2024年第9期67卷 2693-2705页

作者： SONG ZiDong NIAN LuYing SHI Meng REN XiaoPeng TANG Ming SHI AnMei HAN Ying LIU Min wang luyang ZHANG YinPing XU Ying FENG XiaoMeng Department of Building Science Tsinghua University Beijing Key Laboratory of Indoor Air Quality Evaluation and Control National Museum of China Department of Endocrinology Beijing Chao-Yang HospitalCapital Medical University

Non-targeted analysis(NTA) was conducted to identify semi-volatile organic compounds(SVOCs) in a museum in China using the gas chromatography(GC)-Orbitrap-mass spectrometer(MS). Approximately 160 SVOCs were detected, of which 93 had not been reported in previous studies of museum environments. Many of the detected SVOCs were found to be associated with the chemical agents applied in conservation treatment and the materials used in furnishings. The results of hierarchical cluster analysis(HCA) indicated a spatial variation of SVOCs in the indoor air in the museum, but there were no obvious temporal differences of SVOCs observed in indoor dust. Spearman's correlation analysis showed that several classes of SVOCs were well correlated, suggesting their common sources. Fragrances and plasticizers were found to be the primary sources of SVOC pollution detected in the museum. Compared with compounds in outdoor air, indoor SVOCs had a lower level of unsaturation and more portions of chemically reduced compounds. This study is the first of its kind to comprehensively characterize SVOCs in a museum using an automated NTA approach with GC-Orbitrap-MS. The SVOCs identified in the current study are likely to be present in other similar museums; therefore, further examination of their potential impacts on cultural heritage artifacts,museum personnel, and visitors may be warranted.

关键词： non-target analysis high-resolution mass spectrometry semi-volatile organic compounds museum environment air pollutants

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新型配电系统灵活性及其评价指标综述

供用电 2024年第8期41卷 35-44页

作者：赵倩宇王璐洋王守相天津大学教育部智能电网重点实验室天津300072 天津大学天津市电力系统仿真控制重点实验室天津300072

随着“双碳”政策的驱动和新型电力系统建设的推进,新能源发电在配电系统中的占比进一步提高。配电系统由传统的单纯接受、分配电能转变为源网荷储灵活互动的新型配电系统,其复杂程度的提升使得系统对灵活性的需要日益增加。在此背景下... 详细信息

随着“双碳”政策的驱动和新型电力系统建设的推进,新能源发电在配电系统中的占比进一步提高。配电系统由传统的单纯接受、分配电能转变为源网荷储灵活互动的新型配电系统,其复杂程度的提升使得系统对灵活性的需要日益增加。在此背景下,首先从源网荷储等方面介绍了新型配电系统的特征变化和所面临的灵活性挑战;其次,从物理、技术和市场3个层面论述了新型配电系统中灵活性资源参与灵活性提升的机理;然后,从运行灵活性和网架灵活性2个方面,对现阶段新型配电系统灵活性指标进行归纳;最后,对新型配电系统灵活性的发展方向提出展望。

关键词：新型配电系统灵活性源网荷储特征变化评价指标

镍同位素在高温岩浆系统中的研究进展和矿床学应用

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岩石学报 2024年第6期40卷 1959-1971页

作者：张泽薛胜超唐冬梅王路阳王晓曼田洪庆张瑞麟中国地质大学地质过程与矿产资源国家重点实验室北京100083 中国科学院矿产资源研究重点实验室中国科学院地质与地球物理研究所北京100029

Ni同位素在高温岩浆系统中被识别出高达4‰的δ60/58 Ni变化范围,打破了传统元素质量数越大同位素分馏相对越小的观点,这种高温岩浆体系中产生的巨大的同位素分馏可能是多个平衡同位素分馏过程叠加和/或动力学分馏导致的,因而也被应用... 详细信息

Ni同位素在高温岩浆系统中被识别出高达4‰的δ60/58 Ni变化范围,打破了传统元素质量数越大同位素分馏相对越小的观点,这种高温岩浆体系中产生的巨大的同位素分馏可能是多个平衡同位素分馏过程叠加和/或动力学分馏导致的,因而也被应用到岩浆铜镍硫化物矿床中。前人对高温岩浆过程Ni同位素分馏机理的认识包括:(1)玄武岩难以代表地幔的Ni同位素组成;(2)地幔部分熔融和壳源物质循环不会产生明显的Ni同位素分馏,地幔交代作用是导致地幔Ni同位素不均一的主要原因;(3)硫化物参与的过程是高温岩浆体系产生Ni同位素变化的主控因素,例如,硫化物的溶解、结晶、熔离以及和硅酸盐岩浆的相互作用。目前Ni同位素在高温地质过程中的研究与应用还处于发展阶段,同位素分馏系数和简约配分函数比等参数有待确定,需要结合更精确的模拟计算和更合理的高温高压实验来解决。查明地幔交代过程中Ni同位素分馏的具体机制,有望精准识别地幔源区的岩石性质和精细交代过程;Ni和Cu同位素的联合应用在岩浆铜镍矿床的金属富集机制和地球动力学环境研究方面显示出巨大潜力。

关键词： Ni同位素同位素分馏地幔交代岩浆铜镍硫化物矿床高温地质过程

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不同氮肥形态对李氏禾铬富集能力的影响

农业环境科学学报 2024年第6期43卷 1250-1259页

作者：陈诗奇刘杰蒋旭升韩庆坤王路洋桂林理工大学环境污染控制理论与技术广西重点实验室广西桂林541004

为了优化李氏禾(Leersia hexandra Swartz)铬修复时的施氮效率,通过盆栽试验,研究了5种氮肥形态(硝酸钙、尿素、氯化铵、硝酸铵、硫酸铵)对李氏禾铬修复性能、生长指标和根系指标的影响。结果表明:与对照(不施氮肥)相比,施加的5种形态... 详细信息

为了优化李氏禾(Leersia hexandra Swartz)铬修复时的施氮效率,通过盆栽试验,研究了5种氮肥形态(硝酸钙、尿素、氯化铵、硝酸铵、硫酸铵)对李氏禾铬修复性能、生长指标和根系指标的影响。结果表明:与对照(不施氮肥)相比,施加的5种形态氮肥均促进了李氏禾生长,提高了根系活力,改变了根系形态特征,有利于提高李氏禾铬含量、铬累积量、富集系数和土壤铬去除率。施加硫酸铵的李氏禾生物量和根平均直径最大,分别为对照的5.54倍和1.51倍,其根系活力比对照增加108%;施加硝酸铵的李氏禾总根表面积和总根体积最大,分别为对照的2.17倍和1.99倍(P<0.05)。相关性分析结果表明,李氏禾的生物量、根平均直径、总根表面积、总根体积和根系活力均与土壤铬修复效率有关。其中,施加硫酸铵处理的富集系数和土壤铬去除率最高,分别为对照的1.45倍和5.56倍。研究表明,施加硫酸铵比其他氮肥形态更有利于提高李氏禾铬污染土壤修复效率。

关键词：氮肥形态铬污染李氏禾根系特征修复效率

基于虚拟直流电机的分布式储能系统能量动态分配策略

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现代电力 2024年第3期41卷 547-556页

作者：乔露王鲁杨李唯嘉马海宁上海电力大学电气工程学院上海市杨浦区200090 国网上海市电力公司超高压分公司上海市浦东新区201204

为了增强直流微电网中分布式储能系统的惯性,并在线路阻抗不匹配的情况下实现各储能单元(energy storage unit,ESU)的荷电状态(state of charge,SOC)均衡,提出一种基于虚拟直流电机(virtual DC machine,VDCM)的分布式储能系统能量动态... 详细信息

为了增强直流微电网中分布式储能系统的惯性,并在线路阻抗不匹配的情况下实现各储能单元(energy storage unit,ESU)的荷电状态(state of charge,SOC)均衡,提出一种基于虚拟直流电机(virtual DC machine,VDCM)的分布式储能系统能量动态分配策略。首先,将VDCM技术应用到储能侧控制中,利用VDCM的输出特性增强系统的抗扰能力。然后,利用电枢回路方程输出特性,并根据储能系统能量分配需求,动态设计虚拟电枢电阻,使其可随SOC在规定界限内自适应变化,实时调整各变换器的输出功率,并引入压降调节因子动态微调各变换器输出虚拟压降至相等,从而补偿线路阻抗的不匹配度,实现各ESU的SOC均衡。此外,采用一致性算法在相邻ESU间获得所需平均值信息,增强系统的可扩展性。最后,搭建光伏多储能直流微电网系统模型,仿真和实验结果验证了所提控制策略的合理性和有效性。

关键词：直流微电网荷电状态虚拟直流电机分布式储能系统能量动态分配虚拟电枢电阻直流母线电压压降调节因子

A semiclassical approach to surface Fermi arcs in Weyl semimetals

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Science China(Physics,Mechanics & Astronomy) 2022年第6期65卷 110-115页

作者： Jiajia Huang luyang wang Dao-Xin Yao State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Provincial Key Laboratory of Magnetoelectric Physics and DevicesSchool of PhysicsSun Yat-sen UniversityGuangzhou 510275China College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China International Quantum Academy Shenzhen 518048China

We present a semiclassical explanation for the morphology of the surface Fermi arcs of Weyl *** the surface states as a two-dimensional Fermi gas subject to band bending and Berry curvatures,we show that it is the non-parallelism between the velocity and the momentum that gives rise to the spiral structure of Fermi *** map out the Fermi arcs from the velocity field for a single Weyl point and a lattice with two Weyl *** also investigate the surface magnetoplasma of Dirac semimetals in a magnetic field,and find that the drift motion,the chiral magnetic effect and the Imbert-Fedorov shift are all involved in the formation of surface Fermi *** work not only provides an insightful perspective on the surface Fermi arcs and a practical way to find the surface dispersion,but also paves the way for the study of other physical properties of the surface states of topological semimetals,such as transport properties and orbital magnetization,using semiclassical methods.

关键词： Weyl semimetals surface Fermi arcs semiclassical equations of motion Dirac semimetals surface magnetoplasma