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Enhancing antioxidant activity and fragrant profile of low-ethanol kiwi wine via sequential culture of indigenous Zygosaccharomyces rouxii and Saccharomyces cerevisiae

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Food bioscience 2023年第1期51卷 267-277页

作者： Shiqi Li Xiaowen Chen Zhiyi gao Zhe Zhang Pengfei bi Jing Guo College of Food Science and Engineering Northwest A&F University712100YanglingShaanxiPeople’s Republic of China

To explore a novel producing strategy for enhancing antioxidant activity and aroma of low-ethanol kiwi wine,kiwifruit juice was sequential fermentation with indigenous Zygosaccharomyces rouxii(Zr)and Saccharomyces cerevisiae(Sc)without adding *** organic acids,bioactive compounds,volatile constituents,antioxidant capacities and sensory profiles were measured to evaluate the performance of different inoculation *** results indicated that compared with pure fermentation of Sc,the sequential fermentations significantly increased the total flavonoids,total phenols,some mono-phenols and antioxidant activities of the low-ethanol kiwi wines,and resulted in a positive effect on organic acids mainly by reducing the content of malic *** the same time,sequential fermentations significantly enhanced the aroma profile of the low-ethanol kiwi *** higher inoculation ratio of Zr greatly increased the complexity of the volatiles,improving sweet odor of the *** the similar inoculation ratio of Zr and Sc significantly increased the volatile contents,intensifying the tropical fruity and kernel *** addition,the partial least-squares regression analysis showed that aldehydes resulted in sourness,ethyl esters and acetate esters possessed a positive impact on tropical fruity and kernel fruity.

关键词： Low-ethanol kiwi wine Zygosaccharomyces rouxii Antioxidant properties Fragrant profiles rOAV Relative odor activity value

Design, fabrication, and testing of low-group-velocity S-band traveling-wave accelerating structure

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Nuclear Science and Techniques 2022年第11期33卷 133-143页

作者： Xian-Cai Lin Hao Zha Jia-Ru Shi Liu-Yuan Zhou Yi-Fan Liang Jian gao Qiang gao Huai-bi Chen Chuan-Xiang Tang Department of Engineering Physics Tsinghua UniversityBeijing 100084China Key Laboratory of Particle and Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China

To implement the Tsinghua Thomson Scattering X-ray Source upgrade plan and the Very Compact Inverse Compton Scattering Gamma-ray Source (VIGAS) program, a new 1.5-m traveling-wave accelerating structure was designed to replace the old 3-m SLAC-type structure with the aim of increasing the accelerating gradient from15 to 30 MV/m. The new type of structure works in the 3π/4 mode with a comparatively low group velocity varying from 0.007c to 0.003c to increase the accelerating gradient at a given power. An elliptical iris was employed to reduce the surface field enhancement. The filling process of the low-group-velocity structure was analyzed using a circuit model. After fabrication, the structure was precisely tuned using the non-contact tuning method, followed by detailed low-power radiofrequency measurements. The structure was first installed and utilized at a beamline for the terahertz experiment at Tsinghua University. After 120 h of conditioning, it is now operating at a gradient of 24.2 MV/m and a 20.7-MW input power, with the klystron operating at its full power. It is expected to generate an accelerating gradient of 30 MV/m when the klystron power is upgraded to 30 MW in the near future.

关键词： Traveling-wave accelerating structure Cavity optimization Tuning method High-power test

Microstructure Characteristics and Corrugation Interface Behavior of Al/Mg/Al Composite Plate Rolled Under Large Strain

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Acta Metallurgica Sinica(English Letters) 2023年第5期36卷 827-838页

作者： Peng-da Huo Feng Li Wen-Tao Niu Rong-He gao&An-Xin Zhang School of Materials Science and Chemical Engineering Harbin University of Science and TechnologyHarbin150040China Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education Harbin Institute of TechnologyHarbin150001China Key Laboratory of Superlight Materials and Surface Technology Ministry of EducationHarbin Engineering UniversityHarbin150001China

Traditional rolled(TR)aluminum(Al)/magnesium(Mg)/aluminum(Al)composite plates have many bottlenecks such as multiple passes,low interlaminar strength,and weak mechanical *** this paper,the hard-plate rolling(HPR)method was used to prepare Al/Mg/Al composite plates under a single pass reduction of 60%.The results show that the ultimate tensile strength(UTS)of the composite plate obtained by hard-plate rolling is 262.3 MPa,and the percentage of total elongation at fracture(At)is 12.3%,which is 31.6%and 37.4%higher than that of the traditional rolling,*** is attributed to the unique corrugated interlocking structure of the interface of the composite plate caused by hard-plate *** shear texture produced by the Mg plate weakens the strong-basal *** the same time,the strong basal slip and the large amount of energy stored in the deformed grains provide favorable conditions for dynamic recrystallized(DRX)*** microstructure is deeply refined by DRX,and the strength and plasticity of the composite plate are improved *** provides scientific guidance for the development of high-performance lightweight composite plates and the research on hard-plate rolling technology and also has good industrial production and application potential.

关键词： Hard-plate rolling Al/Mg/Al composite plate Corrugated interface Strength-plasticity Strengthening mechanism

Traditional Chinese Medicine: an effective treatment for 2019 novel coronavirus pneumonia(NCP)

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Chinese Journal of Natural Medicines 2020年第3期18卷 206-210页

作者： DU Hong-Zhi HOU Xiao-Ying MIAO Yu-Huan HUANG bi-Sheng LIU da-Hui School of Pharmacy Hubei University of Chinese MedicineWuhan 430065China Key Laboratory of Drug Quality Control and Pharmacovigilance(Ministry of Education) State Key Laboratory of Natural MedicineChina Pharmaceutical UniversityNanjing 210009China

The novel coronavirus pneumonia broke out in 2019 and spread rapidly. In 30 different countries, there are over seventy thousand patients have been diagnosed in total. Therefore, it is urgent to develop the effective program to prevent and treat for the novel coronavirus pneumonia. In view of Traditional Chinese Medicine has accumulated a solid theoretical foundation of plague in ancient and recent decades. Meanwhile, Traditional Chinese Medicine can provide the more effective and personalized treatment via adjusting the specific medicine for each patient based on the different syndromes. In addition, TCM often has different effect on the distinct stages of diseases, contributing to the prevention, treatment and rehabilitation. Nowadays, TCM has exhibited decent effect in the in the fight against NCP. Therefore, it is convinced that Traditional Chinese Medicine is an effective treatment for 2019 novel coronavirus pneumonia.

关键词： Traditional Chinese Medicine Novel coronavirus pneumonia Novel coronavirus(2019-n Co V) Infectious diseases Inflammation

Impacts of Market-based Environmental Regulation on Green Total Factor Energy Efficiency in China

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China & World Economy 2023年第3期31卷 92-114页

作者： Ge Li da gao Yi Li School of Business and Management Donghua UniversityChina School of Law and Business Wuhan Institute of TechnologyChina Food and Resource Economics University of FloridaUS.

This study employed a difference-in-differences design to assess the effect of marketbased environmental regulation on green total factor energy efficiency(GTFEE)in a quasi-natural experiment that investigated China's carbon emissions trading scheme(ETS).The empirical results show that ETS had a positive effect on GTFEE.A series of robustness tests revealed that the results were *** mechanisms through which ETS can improve GTFEE include the promotion of technological innovation and the upgrading of industrial *** positive effects varied in different cities and diferent regions-the result was pronounced in eastern China and developed cities,but it was insignificant in central and western areas and developing *** study confirms the satisfactory performance of China's ETS in improving GTFEE,and this is relevant for other emerging countries.

关键词： carbon emissions trading schemes difference-in-differences green tota factor energy efficiency market-based environmental regulation

Fundamental mechanism of effects of MgO on sinter strength

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Journal of Iron and Steel Research International 2019年第11期26卷 1171-1177页

作者： Hong-song Han Feng-man Shen Xin Jiang Chuan-guang bi Hai-yan Zheng Qiang-jian gao School of Metallurgy Northeastern UniversityShenyang 110819LiaoningChina Technology Center Meishan Iron and Steel Limited CorporationNanjing 210000JiangsuChina

MgO-containing flux may have a series of effects on the quality of sinter and performances of the blast ***,the fundamental mechanism of the effects of MgO on the sinter strength was *** the chemical reagent and industrial flux were used for preparing the *** experimental results show that the sinter strength decreases with MgO *** are three reasons for *** first reason is diffusion *** all of the CaO may react with Fe2O3 and generate CaO Fe2O3,but most of MgO cannot react with Fe2O3,and it still remains in the state of original *** diffusion rate of MgO in iron oxide is only 17.51μm/min in 30 *** second reason is the fluidity and ability to generate liquid *** the case of Fe2O3 mixed with CaO,there is some liquid phase formed above 1200℃,while in the case of Fe2O3 mixed with MgO,even at 1200 and 1220℃,there is still no liquid *** third reason is *** the case of industrial flux,the compression strength of the specimens made of Fe2O3 and limestone is 0.52 and 0.71 kN at 1150 and 1180℃,respectively,while that of the specimens made of Fe2O3 and magnesite is 0.48 and 0.56 kN,***,the fundamental mechanism of the effects of MgO additive on sinter strength can be better understood based on the diffusion rate of MgO in iron oxides,the fluidity of liquid phase,and the self-strength of bonding phase.

关键词： MgO addition Sinter strength Blast furnace Mineralization rate Fluidity Self-strength

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水陆两栖飞机波浪中运动统计特性预报

科学技术与工程 2025年第1期25卷 404-409页

作者：孙高翔齐婵颖胡鹏涛成果达宫珏哈尔滨工程大学青岛创新发展基地青岛266000 空装驻西安地区第五军事代表室西安710000 中航工业西安飞行自动控制研究所西安710076

针对当前水陆两栖飞机在波浪中运动时历有效预报时长较短的问题,提出对水陆两栖飞机在一段时间内的运动统计值进行预报,并基于长短期记忆神经(long short-term memory,LSTM)神经网络构建了水陆两栖飞机运动统计特性预报模型。以NACA TN ... 详细信息

针对当前水陆两栖飞机在波浪中运动时历有效预报时长较短的问题,提出对水陆两栖飞机在一段时间内的运动统计值进行预报,并基于长短期记忆神经(long short-term memory,LSTM)神经网络构建了水陆两栖飞机运动统计特性预报模型。以NACA TN 2929水陆两栖飞机为例,基于其数值仿真数据分别对三、四、五级海况下水陆两栖飞机的垂荡、横摇和纵摇三自由度运动统计值进行预报并对其预报效果进行详细分析。结果表明:基于LSTM神经网络的水陆两栖飞机运动统计特性预报模型具有较好的预报精度,在实际工程应用中可以通过该模型对水陆两栖飞机未来一段时间内的运动统计值实现精确预报,为海上作业提供辅助决策信息。

关键词：水陆两栖飞机长短期记忆神经网络运动统计特性运动预报

A new derivative of triterpene with anti-melanoma B16 activity from Conyza canadensis

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Chinese Chemical Letters 2010年第7期21卷 834-837页

作者： Ming Ming Yan Ting You Li da Qing Zhao Shuai Shao Sheng Nan bi Changchun University of Chinese Medicine Changchun 130117China School of Pharmacy Nanjing Medical UniversityNanjing 210029China

A new derivative of triterpene named Erigeronol 1 was isolated from the EtOH extract of the aerial part of Conyza canadensis together with 15 known compounds for the first time from this *** structure of Erigeronol 1 was elucidated as 3-O-（hydroxyacetyl） -23,28-dihydroxy-β-amyrin by hydrolysis and spectroscopic *** 1 showed potent cytotoxic activity with IC_（50） value of 7.77±0.47μg/mL against melanoma B16 determined by the 3-（4,5-dimethylthiazo-2-yl）-2,5-diphenyltetrazolium bromide（MTT） method.

关键词： Conyza canadensis Derivative of triterpene Anti-melanoma B16

Burn-resistant behavior and mechanism of Ti14 alloy

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International Journal of Minerals,Metallurgy and Materials 2016年第2期23卷 215-221页

作者： Yong-nan Chen Ya-zhou Huo Xu-ding Song Zhao-zhao bi Yang gao Yong-qing Zhao School of Materials Science and Engineering Chang'an UniversityXi'an 710064China School of Construction Machinery Chang'an UniversityXi'an 710064China Northwest Institute for Nonferrous Metal Research Xi'an 710016China

The direct-current simulation burning method was used to investigate the burn-resistant behavior of Ti14 titanium *** results show that Ti14 alloy exhibits a better burn resistance than TC4 alloy（Ti-6A1-4V）.Cu is observed to preferentially migrate to the surface of Ti14 alloy during the burning reaction,and the burned product contains Cu,Cu2O,and *** oxide layer mainly comprising loose TiO2 is observed beneath the burned ***,Ti2Cu precipitates at grain boundaries near the interface of the oxide layer,preventing the contact between O2 and Ti and forming a rapid diffusion layer near the matrix ***,a multiple-layer structure with a Cu-enriched layer（burned product）/Cu-lean layer（oxide layer）/Cu-enriched layer（rapid diffusion layer） configuration is formed in the burn heat-affected zone of Ti14 alloy;this multiple-layer structure is beneficial for preventing O2 ***,although A1 can migrate to form A12O3 on the surface of TC4 alloy,the burn-resistant ability of TC4 is unimproved because the Al2O3 is discontinuous and not present in sufficient quantity.

关键词： titanium alloys interface morphology burn resistance