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Effect of pressure cooking on phenolic compounds of quinoa

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粮油科技:英文版 2023年第3期6卷 127-134页

作者： Qianwei Ma Zhixiang Li Thanutchaporn Kumrungsee Wenda Huang Ruge Cao State Key Laboratory of Food Nutrition and Safety College of Food Science and EngineeringTianjin University of Science and TechnologyTianjin 300457China Graduate School ofIntegrated Sciences for Life Hiroshima UniversityHigashi Hroshimna 739-8528Japan Tianjin Kaitaoqi Food Co. LtdTianjin 301799China

Due to good nutritional properties and potential health benefits,quinoa has gained an increasing attention.The study aimed to analyze the effect of pressure cooking on the composition,antioxidant activity,antibacterial activity and bioavailability of phenolic compounds in four types of quinoa,and to evaluate the correlation between phenolics and its biological activities by correlation analysis.The results showed that different varieties of quinoa contained different phenolic components and their biological activities were different.Pressure cooking could significantly increase(P<0.05)the phenolic contents of quinoa,and decrease in vitro digestibility of protein.The antioxidant activity,antibacterial activity and bioavailability of quinoa were also enhanced which were positively related with phenolic contents.HPLC analysis indicated that at least twelve phenolic compounds were found in quinoa,and hyperoside,sinapic acid,rutin and ferulic acid occupied a majority of them.Correlation analysis suggested that hyperoside,quercetin,sinapic acid,ferulic acid and gallic acid made the key contribution to antioxidant and antibacterial activities of phenolic compounds of quinoa.The results provided valuable information for quinoa processing with phenolics as functional ingredient.

关键词： Quinoa Pressure cooking Phenolic compounds Bioactivity Correlation

Relationship between the haplotype distribution of Artemisia halodendron(Asteraceae) and hydrothermal regions in Horqin Sandy Land, northern China

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Research in Cold and Arid Regions 2018年第2期10卷 151-158页

作者： Wenda Huang XueYong Zhao YuLin Li YuQiang Li YaYong Luo Naiman Desertification Research Station Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Key Laboratory of Stress Physiology and Ecology in Cold and Arid Regions Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Urat Desert-grassland Research Station Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences

The genetic diversity of Artemisia halodendron(Asteraceae), a constructive and dominant species in Horqin Sandy Land,was investigated to examine the genetic relationships with different hydrothermal regions in Horqin Sandy Land. We sequenced chloroplast DNA(cp DNA) fragments(trn L–F) of 243 plants from 10 populations across the Horqin Sandy Land.The analyses of cp DNA variation identified seven haplotypes. A low level of haplotype diversity(H_d=0.706) and nucleotide diversity(π=0.0013) was detected. Haplotypes clustered into two tentative clades. Low genetic differentiation among regions was consistently indicated by hierarchical analyses of molecular variance(AMOVA). Across the sampled populations, the haplotype distributions were differentiated with hydrothermal gradients.

关键词： Artemisia halodendron population genetics chloroplast DNA trnL-F Horqin Sandy Land

Memristive switching in two-dimensional BiSe crystals

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Nano Research 2023年第2期16卷 3188-3194页

作者： wenda Ma Junfeng Lu Shuaipeng Ge Li Zhang Fengchang huang Naiwei Gao Peiguang Yan Caofeng Pan College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhen 518060China CAS Center for Excellence in Nanoscience Beijing Key Laboratory of Micro-nano Energy and SensorBeijing Institute of Nanoenergy and NanosystemsChinese Academy of SciencesBeijing 101400China College of Physics Nanjing University of Aeronautics and AstronauticsNanjing 211106China State Key Laboratory of Bioelectronics Southeast UniversityNanjing 210096China

In spite of the explosive rise of research on memristive switching,more improvements in tunability,versatility,and hetero-integration are required through the discovery and application of novel materials.Herein,we report resistance switching in nano-thick two-dimensional(2D)crystals of bismuth selenium(BiSe).The BiSe devices exhibit nonvolatile bipolar resistance switching,volatile switching,and electrical bistable behavior in different conditions.The different memristive behavior of BiSe devices may be related to the concentration of Bi ions in this Bi-rich structure,which directly affects the capability of filaments forming.Furthermore,the external mechanical strain is applied in modulation of multi-layer BiSe devices.The memristive BiSe devices show a large on/off ratio of~10^(4)and retention time of~104 s.The discovery of memristive switching behavior in multi-layer BiSe is attributed to the forming of Bi filaments.The resistance switching behavior in multi-layer BiSe demonstrates the potential application in the flexible memories and functional integrated devices.

关键词： bismuth selenium heterostructure resistance switching memristors flexible memories strain engineering

Water molecules and oxygen-vacancy modulation of vanadium pentoxide with fast kinetics toward ultrahigh power density and durable flexible all-solid-state zinc ion battery

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Journal of Energy Chemistry 2023年第10期85卷 581-591,I0014页

作者： wenda Qiu Yunlei Tian Shuting Lin Aihua Lei Zhangqi Geng Kaitao huang Jiancong Chen Fuchun huang Huajie Feng Xihong Lu Guangdong Industry Polytechnic College Guangzhou 510300GuangdongChina MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry KLGHEI of Environment and Energy ChemistrySchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275GuangdongChina Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province Hainan Normal UniversityHaikou 571158HainanChina

Aqueous zinc ion battery(ZIB)with many virtues such as high safety,cost-effective,and good environmental compatibility is a large-scale energy storage technology with great application potential.Nevertheless,its application is severely hindered by the slow diffusion of zinc ions in desirable cathode materials.Herein,a technique of water-incorporation coupled with oxygen-vacancy modulation is exploited to improve the zinc ions diffusion kinetics in vanadium pentoxide(V_(2)O_5)cathode for ZIB.The incorporated water molecules replace lattice oxygen in V_(2)O_5,and function as pillars to expand interlayer distance.So the structural stability can be enhanced,and the zinc ions diffusion kinetics might also be promoted during the repeated intercalation/deintercalation.Meanwhile,the lattice water molecules can effectively enhance conductivity due to the electronic density modulation effect.Consequently,the modulated V_(2)O_5(H-V_(2)O_5)cathode behaves with superior rate capacity and stable durability,achieving 234 mA h g^(-1)over 9000 cycles even at 20 A g^(-1).Furthermore,a flexible all-solid-state(ASS)ZIB has been constructed,exhibiting an admirable energy density of 196.6 Wh kg^(-1)and impressive power density of 20.4 kW kg^(-1)as well as excellent long-term lifespan.Importantly,the assembled flexible ASS ZIB would be able to work in a large temperature span(from-20 to 70℃).Additionally,we also uncover the energy storage mechanism of the H-V_(2)O_5 electrode,offering a novel approach for creating high-kinetics cathodes for multivalent ion storage.

关键词： Interlayer engineering Water intercalation Vanadium pentoxide Ion diffusion kinetics Zinc ion battery

Artificial root exudates and soil organic carbon mineralization in a degraded sandy grassland in northern China

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Journal of Arid Land 2014年第4期6卷 423-431页

作者： YongQing LUO XueYong ZHAO Olof ANDRéN YangChun ZHU Wenda Huang Naiman Desertification and Farmland Research Station of the Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences University of Chinese Academy of Sciences Bjorklundavagen 3

Plant root exudates contain various organic and inorganic components that include glucose, citric and oxalic acid. These components affect rhizosphere microbial and microfaunal activities, but the mechanisms are not fully known. Studies concerned from degraded grassland ecosystems with low soil carbon（C） contents are rare, in spite of the global distribution of grasslands in need of restoration. All these have a high potential for carbon sequestration, with a reduced carbon content due to overutilization. An exudate component that rapidly decomposes will increase soil respiration and CO2 emission, while a component that reduces decomposition of native soil carbon can reduce CO2 emission and actually help sequestering carbon in soil. Therefore, to investigate root exudate effects on rhizosphere activity, citric acid, glucose and oxalic acid（0.6 g C/kg dry soil） were added to soils from three biotopes（grassland, fixed dune and mobile dune） located in Naiman, Horqin Sandy Land, Inner Mongolia, China） and subjected to a 24-day incubation experiment together with a control. The soils were also analyzed for general soil properties. The results show that total respiration without exudate addition was highest in grassland soil, intermediate in fixed dune and lowest in mobile dune soil. However, the proportion of native soil carbon mineralized was highest in mobile dune soil, reflecting the low C/N ratio found there. The exudate effects on CO2-C emissions and other variables differed somewhat between biotopes, but total respiration（including that from the added substrates） was significantly increased in all combinations compared with the control, except for oxalic acid addition to mobile dune soil, which reduced CO2-C emissions from native soil carbon. A small but statistically significant increase in pH by the exudate additions in grassland and fixed dune soil was observed, but there was a major decrease from acid additions to mobile dune soil. In contrast, electrical conductivity decreased in grassland and fixed dune so

关键词： artificial root exudates carbon mineralization pH variation deteriorated grassland ecosystem Inner Mongolia

Effects of land-use changes on organic carbon in bulk soil and associated physical fractions in China's Horqin Sandy Grassland

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Research in Cold and Arid Regions 2015年第1期7卷 50-58页

作者： YuQiang Li YinPing Chen ShaoKun Wang Wenda Huang JianPeng Zhang Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences School of Environmental and Municipal Engineering Lanzhou Jiaotong University

The Horqin Sandy Grassland is one of the most seriously desertified areas in China＇s agro-pastoral ecotone due to its fragile ecology, combined with improper and unsustainable land management. We investigated organic carbon changes in bulk soil （0 to 5 cm）, light fraction of soil organic matter, and soil particle-size fractions induced by land-use and cover type changes. The results indicated that total soil organic carbon （SOC） storage decreased by 121 g/m^2 with the conversion of grassland into farmland for 30 years, and increased by 261 g/m^2 with the conversion of grassland into plantation for 30 years. Total SOC storage decreased by 157 g/m^2 as a result of severe grassland desertification due to long-term continuous livestock grazing, whereas total SOC increased by 111 g/m^2 following the practice of grazing exclusion （16 years） in desertified areas. Changes in land-use and cover type also show great effects on carbon storage in soil physical fractions.

关键词： carbon storage soil fraction desertification restoration

High rate and ultralong life flexible all-solid-state zinc ion battery based on electron density modulated NiCo_(2)O_(4) nanosheets

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Journal of Energy Chemistry 2022年第7期31卷 283-291,I0008页

作者： wenda Qiu Yunlei Tian Zhenchao Lin Shuting Lin Zhangqi Geng Kaitao huang Aihua Lei Fuchun huang Huajie Feng Fengze Ding Yu Li Xihong Lu Guangdong Industry Polytechnic College Guangzhou 510300GuangdongChina MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry KLGHEI of Environment and Energy ChemistrySchool of ChemistrySun Yat-Sen UniversityGuangzhou 510275GuangdongChina Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province Hainan Normal UniversityHaikou 571158HainanChina

The development of zinc ion batteries (ZIBs) with large capacity,high rate,and durable cathode material is a crucial and urgent task.Ni Co_(2)O_(4)(NCO) has received ever-growing interest as a potential cathode material for ZIBs,owing to the high theoretical capacity,rich source,cost-effective,and versatile redox nature.However,due to the slow dynamics of the NCO electrodes,its practical application in highperformance systems is severely limited.Herein,we report an electron density modulated NCO nanosheets (N-NCO NSs) with high-kinetics Zn^(2+)-storage capability as an additive-free cathode for flexible all-solid-state (ASS) ZIBs.By virtue of the enhanced electronic conductivity,improved reaction kinetics,and increased active sites,the optimized N-NCO NSs electrode delivers a high capacity of 357.7 m Ah g^(-1)at 1.0 A g^(-1)and a superior rate capacity of 201.4 m Ah g^(-1)at 20 A g^(-1).More importantly,a flexible ASS ZIBs device is manufactured using a solid polymer electrolyte of a poly (vinylidene fluoride hexafluoropropylene)(PVDF-HFP) film.The flexible ASS ZIBs device shows superb durability with 80.2%capacity retention after 20,000 cycles and works well in the range of-20–70℃.Furthermore,the flexible ASS ZIBs achieves an impressive energy density as high as 578.1 W h kg^(-1)with a peak power density of 33.6 k W kg^(-1),substantially outperforming those latest ZIBs.This work could provide valuable insights for constructing high-kinetics and high-capability cathodes with long-term stability for flexible ASS ZIBs.

关键词： Electron densities modulation NiCo_(2)O_(4)nanosheets All-solid-state Flexible Zinc ion batteries

Toward sustainable desertification reversion:A case study in Horqin Sandy Land of northern China

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Research in Cold and Arid Regions 2015年第1期7卷 23-28页

作者： XueYong Zhao ShaoKun Wang YaYong Luo Wenda Huang Hao Qu Jie Lian Naiman Desertification Research Station Cold and Arid Regions Environmental and Engineering Research InstituteChinese Academy of Sciences

Desertification reversion is an interactive process involving climate, land use change, and water processes. In order to reveal the relationship between desertification reversion and these factors, we analyzed historical data on precipitation, air temperature, desertified land changes, underground water tables, and water body changes in Naiman County in the central part of Horqin Sandy Land. Our analysis showed that during 1961-2010 the annual precipitation fluctuated dramatically and has decreased fairly consistently in recent years. The air temperature increased by 0.50-1.25℃, and the minimum temperature increased more obviously. The desertified land area increased from 42,300 km^2 in 1959 to 62,000 km^2 in 1985, and then declined to about 50,000 km^2 in 2010. The underground water tables have been lowered by about 10 m in the past 30 years, and declined more rapidly in recent years. Desertified land is significantly related to the amount of total cropland, and underground water tables are signifcantly correlated with annual precipitation and the amount of irrigated cropland. Therefore, it is necessary to pursue sustainable desertification reversion without compromising the capacity for local development and restoration of degraded land, through application of appropriate management measures for improving water availability in this region.

关键词： sustainable desertification reversion climate change land use water table Horqin Sandy Land

Tailoring synergetic catalytic interface of VPO/Ni_(2)P to boost hydrogen evolution under alkaline conditions

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Journal of Energy Chemistry 2022年第2期31卷 674-680页

作者： Wenli Xu Qiqi Li wenda Zhong Bing Sun Qiang huang Xu Nan Yinhong Gao Yao Yang Qin Zhang Nianjun Yang Xuanke Li School of Chemistry and Chemical Engineering Wuhan University of Science and TechnologyWuhan 430081HubeiChina Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan UniversityChangsha 410082HunanChina Institute of Materials Engineering University of SiegenSiegen 57076Germany

Design of the catalyst for efficient water dissociation and hydrogen recombination is paramount in enhancement of the alkaline water electrolysis kinetics.Herein,we reported a delicate hierarchical(VO)_(2) P_(2)O_(7)-Ni_(2) P@NF(VPO-Ni_(2) P@NF)hybrid catalyst that operated efficiently in alkaline media.The VPO and Ni_(2) P respectively act as the water dissociation promoter and the hydrogen recombination center,which synergistically propel water adsorption/dissociation and H intermediates recombination.The resulting synergistic interfaces between VPO and Ni_(2) P are verified to afford the catalyst an outstanding performance for hydrogen evolution reaction in alkaline media with an overpotential of 154 mV at 10 mA cm^(-2),Tafel slope of 65 mV dec^(-1),and remarkable durability.Furthermore,the catalyst presents the potential for overall water splitting.This work may shed fresh light on the high-performance electrocatalyst design and the application of VPO on water electrolysis.

关键词： Alkaline water electrolysis Interface engineering (VO)_(2)P_(2)O_(7) Ni_(2)P