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Research advances in bioactive components and health benefits of jujube(Ziziphus jujuba Mill.)fruit 认领 引用 被引量：52
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作者 Yang LU Tao BAO +2 位作者 Jianling MO Jingdan NI Wei CHEN 《Journal of Zhejiang University-SCIENCE B》 SCIE CAS CSCD 2021年第6期431-449,共19页
Jujube(Ziziphus jujuba Mill.),a highly nutritious and functional fruit,is reported to have various health benefits and has been extensively planted worldwide,especially in China.Many studies have shown that bioactive ... Jujube(Ziziphus jujuba Mill.),a highly nutritious and functional fruit,is reported to have various health benefits and has been extensively planted worldwide,especially in China.Many studies have shown that bioactive components derived from jujube fruit have significant nutritional and potential biological effects.In this paper,the latest progress in research on major bioactive compounds obtained from jujube is reviewed,and the potential biological functions of jujube fruit resources are discussed.As a dietary supplement,jujube fruit is well recognized as a healthy food which contains a variety of bioactive substances,such as polysaccharides,polyphenols,amino acids,nucleotides,fatty acids,dietary fiber,alkaloids,and other nutrients.These nutrients and non-nutritive phytochemicals obtained from jujube fruit have physiological functions including anticancer,antioxidant,anti-inflammatory,anti-hyperlipidemic,anti-hyperglycemic,immunoregulatory,neuroprotective,sedative,and antiviral functions.Of note is that new constituents,including alkaloids,dietary fiber,and other bioactive substances,as well as the antiviral,hypoglycemic,lipid-lowering,and neuroprotective effects of jujube fruit,are systematically reviewed here for the first time.Meanwhile,problems affecting the exploitation of jujube fruit resources are discussed and further research directions proposed.Therefore,this review provides a useful bibliography for the future development of jujube-based products and the utilization of jujube nutritional components in functional foods. 展开更多
关键词 Jujube Bioactive components Biological activity Functional foods Health benefits
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Edible prodelphinidins that improve postprandial hyperglycemia were discovered in Chinese bayberry(Myrica rubra Sieb.et Zucc.)fruits 认领 引用
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作者 Yi Wang Laiming Zhang +4 位作者 Jiaxiong Wu Chengxiao Yu Xingqian Ye Haibo Pan Shiguo Chen 《Food Science and Human Wellness》 SCIE CAS CSCD 2025年第3期1008-1016,共9页
Plant polyphenols are potential substitutes for clinicalα-glucosidase inhibitors.Our previous studies indicated that prodelphinidins from Chinese bayberry leaves(BLPs)have strongerα-glucosidase inhibitory activity t... Plant polyphenols are potential substitutes for clinicalα-glucosidase inhibitors.Our previous studies indicated that prodelphinidins from Chinese bayberry leaves(BLPs)have strongerα-glucosidase inhibitory activity than other common polyphenols,but they have no safe history of consumption.There is a reasonable prospect that prodelphinidins from Chinese bayberry fruits(BFPs)can improve postprandial hyperglycemia,though known active components are only myricetin and cyanidin-3-O-glucoside.Hence,the aim of this study was to analyze structure and hypoglycemic effect of BFPs of“Biqi”(BQPs)and“Dongkui”(DKPs)cultivars,and compare their difference with BLPs.The contents of BQPs and DKPs were(221.73±0.60)and(136.82±4.33)mg epicatechin(EC)equivalents/g dry weight,respectively.The most subunits were epigallocatechin gallate along with a small amount of epigallocatechin,epicatechin gallate and EC connected by B-type linkages and a small portion of A-type linkages with mean polymerization degree of 4.25 and 4.08,respectively.Importantly,BQPs and DKPs wereα-glucosidase inhibitors with half inhibitory concentration of 11.91 and 9.47μg/m L respectively,which were significantly stronger than BLPs.DKPs could also improve postprandial hyperglycemia of normal mice and high fat diet-induced type II diabetic mice.Therefore,edible prodelphinidins,which have stronger hypoglycemic effect than BLPs,were first found in Chinese bayberry fruits. 展开更多
关键词 Chinese bayberry fruit Prodelphinidins Structure α-Glucosidase Postprandial hyperglycemia
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Lactobacillus kefiranofaciens and Lactobacillus kefiri are the key species in kefir for reversing oxytetracycline-induced intestinal damage in zebrafish 认领 引用
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作者 Yang Qiu Fujie Yan +5 位作者 Honghao Li Huilin Yu Shengyao Xia Jie Zhang Jianyue Ying Jiajin Zhu 《Food Science and Human Wellness》 SCIE CAS CSCD 2025年第9期3718-3734,共17页
Increased accumulation of oxytetracycline(OTC)in environmental water bodies could potentially lead to its accumulation in human body,thereby damaging human intestinal tract.Dietary interventions could be helpful for r... Increased accumulation of oxytetracycline(OTC)in environmental water bodies could potentially lead to its accumulation in human body,thereby damaging human intestinal tract.Dietary interventions could be helpful for recovery of intestinal morphology and function.Therefore,this study set zebrafish as model to explore the potential of kefir supplementation in the recovery of intestinal damage caused by exposure to OTC.In experiments by zebrafish,the rearing units used were glass tanks,each with volume of 5 L.The tanks were stocked with 12 zebrafish each.For each treatment,there were 8 replicate tanks.The zebrafish were treated with OTC followed by the addition of kefir to the food.The results showed positive improvements with kefir supplementation.Kefir treatment mitigated intestinal inflammation by reducing the levels of TNF-α,IL-6,and IL-1β;enhancing the activity of the antioxidant enzymes catalase,superoxide dismutase,glutathione peroxidase and increasing the gene expression of intestinal tight junction proteins(ZO-1a and ZO-1b).These effects were beneficial for reversing reduced integrity of intestinal barrier caused by OTC.Moreover,kefir helped to reverse the disruption of gut microbiota caused by OTC and further impacted host metabolism.Specifically,Lactobacillus kefiranofaciens and Lactobacillus kefiri,which were derived from the kefir microbiota,were found to be enriched in the zebrafish intestine.This helped to inhibit the increased abundance of some Proteobacteria species induced by OTC treatment.Liver metabolomics analysis revealed that kefir improved OTC-induced disruptions in the tricarboxylic acid cycle,glycerophospholipid and amino acid metabolism.The differentially abundant metabolites identified included a total of 80 types after OTC exposure,with the abundance of 74 kinds significantly reversed following kefir treatment.Correlation analysis revealed that certain Proteobacteria species and above Lactobacillus species were closely linked with metabolic inhibition in zebrafish caused by OTC and metabolic restoration caused by kefir treatment,respectively. 展开更多
关键词 Kefir Oxytetracycline Zebrafish Microbiome Host metabolism
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Nitrogen-Doped Carbon-Encased Bimetallic Selenide for High-Performance Water Electrolysis 认领 引用 被引量：20
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作者 Junhui Cao Kexin Wang +6 位作者 Jiayi Chen Chaojun Lei Bin Yang Zhongjian Li Lecheng Lei Yang Hou Kostya Ostrikov 《Nano-Micro Letters》 SCIE EI CAS CSCD 2019年第4期185-195,共11页
Demand of highly efficient earth-abundant transition metal-based electrocatalysts to replace noble metal materials for boosting oxygen evolution reaction(OER)is rapidly growing.Herein,an electrochemically exfoliated g... Demand of highly efficient earth-abundant transition metal-based electrocatalysts to replace noble metal materials for boosting oxygen evolution reaction(OER)is rapidly growing.Herein,an electrochemically exfoliated graphite(EG)foil supported bimetallic selenide encased in N-doped carbon(EG/(Co,Ni)Se2-NC)hybrid is developed and synthesized by a vapor-phase hydrothermal strategy and subsequent selenization process.The as-prepared EG/(Co,Ni)Se2-NC hybrid exhibits a core-shell structure where the particle diameter of(Co,Ni)Se2 core is about 70 nm and the thickness of N-doped carbon shell is approximately 5 nm.Benefitting from the synergistic effects between the combination of highly active Co species and improved electron transfer from Ni species,and N-doped carbon,the EG/(Co,Ni)Se2-NC hybrid shows remarkable electrocatalytic activity toward OER with a comparatively low overpotential of 258 mV at an current density of 10 mA cm?2 and a small Tafel slope of 73.3 mV dec?1.The excellent OER catalysis performance of EG/(Co,Ni)Se2-NC hybrid is much better than that of commercial Ir/C(343 mV at 10 mA cm?2 and 98.1 mV dec?1),and even almost the best among all previously reported binary CoNi selenide-based OER electrocatalysts.Furthermore,in situ electrochemical Raman spectroscopy combined with ex situ X-ray photoelectron spectroscopy analysis indicates that the superb OER catalysis activity can be attributed to the highly active Co-OOH species and modified electron transfer process from Ni element. 展开更多
关键词 Core-shell structure Bimetallic selenide N-doped carbon Synergistic effect Oxygen evolution reaction
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Fluid-driven artificialmuscles: bio-design, manufacturing, sensing, control, and applications 认领 引用 被引量：13
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作者 Chao Zhang Pingan Zhu +4 位作者 Yangqiao Lin Wei Tang Zhongdong Jiao Huayong Yang Jun Zou 《Bio-Design and Manufacturing》 SCIE EI CAS CSCD 2021年第1期123-145,共23页
Developing artificial muscles that can replace biological muscles to accomplish various tasks iswhat we have long been aiming for.Recent advances in flexible materials and 3D printing technology greatly promote the de... Developing artificial muscles that can replace biological muscles to accomplish various tasks iswhat we have long been aiming for.Recent advances in flexible materials and 3D printing technology greatly promote the development of artificial muscle technology.A variety of flexible material-based artificial muscles that are driven by different external stimuli,including pressure,voltage,light,magnetism,temperature,etc.,have been developed.Among these,fluid-driven artificial muscles(FAMs),which can convert the power of fluid(gas or liquid)into the force output and displacement of flexible materials,are the most widely used actuation methods for industrial robots,medical instruments,and human-assisted devices due to their simplicity,excellent safety,large actuation force,high energy efficiency,and low cost.Herein,the bio-design,manufacturing,sensing,control,and applications of FAMs are introduced,including conventional pneumatic/hydraulic artificial muscles and several innovative artificial muscles driven by functional fluids.What’s more,the challenges and future directions of FAMs are discussed. 展开更多
关键词 Artificial muscles Fluid Bio-design Manufacturing Sensoring Control
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Low-loss chip-scale programmable silicon photonic processor 认领 引用 被引量：15
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作者 Yiwei Xie Shihan Hong +4 位作者 Hao Yan Changping Zhang Long Zhang Leimeng Zhuang Daoxin Dai 《Opto-Electronic Advances》 SCIE EI CAS CSCD 2023年第3期25-41,共17页
Chip-scale programmable optical signal processors are often used to flexibly manipulate the optical signals for satisfying the demands in various applications,such as lidar,radar,and artificial intelligence.Silicon ph... Chip-scale programmable optical signal processors are often used to flexibly manipulate the optical signals for satisfying the demands in various applications,such as lidar,radar,and artificial intelligence.Silicon photonics has unique advantages of ultra-high integration density as well as CMOS compatibility,and thus makes it possible to develop large-scale programmable optical signal processors.The challenge is the high silicon waveguides propagation losses and the high calibration complexity for all tuning elements due to the random phase errors.In this paper,we propose and demonstrate a programmable silicon photonic processor for the first time by introducing low-loss multimode photonic waveguide spirals and low-random-phase-error Mach-Zehnder switches.The present chip-scale programmable silicon photonic processor comprises a 1×4 variable power splitter based on cascaded Mach-Zehnder couplers(MZCs),four Ge/Si photodetectors,four channels of thermally-tunable optical delaylines.Each channel consists of a continuously-tuning phase shifter based on a waveguide spiral with a micro-heater and a digitally-tuning delayline realized with cascaded waveguide-spiral delaylines and MZSs for 5.68 ps time-delay step.Particularly,these waveguide spirals used here are designed to be as wide as 2μm,enabling an ultralow propagation loss of 0.28 dB/cm.Meanwhile,these MZCs and MZSs are designed with 2-μm-wide arm waveguides,and thus the random phase errors in the MZC/MZS arms are negligible,in which case the calibration for these MZSs/MZCs becomes easy and furthermore the power consumption for compensating the phase errors can be reduced greatly.Finally,this programmable silicon photonic processor is demonstrated successfully to verify a number of distinctively different functionalities,including tunable time-delay,microwave photonic beamforming,arbitrary optical signal filtering,and arbitrary waveform generation. 展开更多
关键词 silicon photonics programmable photonic integrated circuit waveguide delay lines Mach-Zehnder interferometer
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Assessment of quality deviation of pork and salmon due to temperature fluctuations during superchilling 认领 引用 被引量：12
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作者 Haoxin CUI Naymul KARIM +2 位作者 Feng JIANG Haimei HU Wei CHEN 《Journal of Zhejiang University-SCIENCE B》 SCIE CAS CSCD 2022年第7期578-586,共9页
Superchilling is an emerging technology for meat preservation;however,the temperature changes during the process have been commonly ignored.Thus,the effects of temperature fluctuations on meat quality during superchil... Superchilling is an emerging technology for meat preservation;however,the temperature changes during the process have been commonly ignored.Thus,the effects of temperature fluctuations on meat quality during superchilling are yet to be evaluated.In our study,pork loins and salmon fillets were stored for several days(0,8,15,23,and 30 d)under different temperature fluctuations based on−3.5℃ as the target temperature.The results showed that after 15 d of superchilling storage,the values of total volatile basic nitrogen,total viable count,and lipid oxidation were significantly(P<0.05)altered in the±2.0℃ fluctuation group compared with the constant temperature group.On the contrary,there was no significant difference in these parameters between the±1.0℃ fluctuation group and the constant temperature group after 30 d of storage.In addition,irregular temperature changes significantly accelerated the modulation of various indicators.In brief,temperature fluctuations and irregular temperature changes accelerated the destruction of muscle structural integrity,increased the water loss,gradually widened the water loss channels,and thereby reduced the edibility by accelerating the spoilage of meat. 展开更多
关键词 Pork Salmon Superchilling Temperature fluctuation Meat quality
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A Superaerophobic Bimetallic Selenides Heterostructure for Efficient Industrial-Level Oxygen Evolution at Ultra-High Current Densities 认领 引用 被引量：15
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作者 Jiaxin Yuan Xiaodi Cheng +8 位作者 Hanqing Wang Chaojun Lei Sameer Pardiwala Bin Yang Zhongjian Li Qinghua Zhang Lecheng Lei Shaobin Wang Yang Hou 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第8期213-224,共12页
Cost-effective and stable electrocatalysts with ultra-high current densities for electrochemical oxygen evolution reaction(OER)are critical to the energy crisis and environmental pollution.Herein,we report a superaero... Cost-effective and stable electrocatalysts with ultra-high current densities for electrochemical oxygen evolution reaction(OER)are critical to the energy crisis and environmental pollution.Herein,we report a superaerophobic three dimensional(3D)heterostructured nanowrinkles of bimetallic selenides consisting of crystalline NiSe2 and NiFe2Se4 grown on NiFe alloy(NiSe2/NiFe2Se4@NiFe)prepared by a thermal selenization procedure.In this unique 3D heterostructure,numerous nanowrinkles of NiSe2/NiFe2Se4 hybrid with a thickness of ~100 nm are grown on NiFe alloy in a uniform manner.Profiting by the large active surface area and high electronic conductivity,the superaerophobic NiSe2/NiFe2Se4@NiFe heterostructure exhibits excellent electrocatalytic activity and durability towards OER in alkaline media,outputting the low potentials of 1.53 and 1.54 V to achieve ultra-high current densities of 500 and 1000 mA cm^−2,respectively,which is among the most active Ni/Fe-based selenides,and even superior to the benchmark Ir/C catalyst.The in-situ derived FeOOH and NiOOH species from NiSe2/NiFe2Se4@NiFe are deemed to be efficient active sites for OER. 展开更多
关键词 Superaerophobicity Bimetallic selenide Heterostructure electrocatalyst Strong interfacial coupling Oxygen evolution reaction
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Present Status and Prospect of High-Frequency Electro-hydraulic Vibration Control Technology 认领 引用 被引量：10
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作者 Yi Liu Tao Wang +1 位作者 Guofang Gong Rujun Gao 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2019年第6期1-16,共16页
Electro-hydraulic vibration equipment(EHVE)is widely used in vibration environment simulation tests,such as vehicles,weapons,ships,aerospace,nuclear industries and seismic waves replication,etc.,due to its large outpu... Electro-hydraulic vibration equipment(EHVE)is widely used in vibration environment simulation tests,such as vehicles,weapons,ships,aerospace,nuclear industries and seismic waves replication,etc.,due to its large output power,displacement and thrust,as well as good workload adaptation and multi-controllable parameters.Based on the domestic and overseas development of high-frequency EHVE,dividing them into servo-valve controlled vibration equipment and rotary-valve controlled vibration equipment.The research status and progress of high-frequency electro-hydraulic vibration control technology(EHVCT)are discussed,from the perspective of vibration waveform control and vibration controller.The problems of current electro-hydraulic vibration system bandwidth and waveform distortion control,stability control,offset control and complex vibration waveform generation in high-frequency vibration conditions are pointed out.Combining the existing rotary-valve controlled high-frequency electro-hydraulic vibration method,a new twin-valve independently controlled high-frequency electro-hydraulic vibration method is proposed to break through the limitations of current electro-hydraulic vibration technology in terms of system frequency bandwidth and waveform distortion.The new method can realize independent adjustment and control of vibration waveform frequency,amplitude and offset under high-frequency vibration conditions,and provide a new idea for accurate simulation of high-frequency vibration waveform. 展开更多
关键词 Electro-hydraulic vibration equipment High-frequency Vibration control Vibration waveform Twin-valve
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Integrated System of Solar Cells with Hierarchical NiCo2O4 Battery-Supercapacitor Hybrid Devices for Self-Driving Light-Emitting Diodes 认领 引用 被引量：10
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作者 Yuliang Yuan Yangdan Lu +10 位作者 BeiEr Jia Haichao Tang Lingxiang Chen YuJia Zeng Yang Hou Qinghua Zhang Qinggang He Lei Jiao Jianxing Leng Zhizhen Ye Jianguo Lu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2019年第3期92-103,共12页
An integrated system has been provided with a-Si/H solar cells as energy conversion device,NiCo2O4battery-supercapacitor hybrid(BSH)as energy storage device,and light emitting diodes(LEDs)as energy utilization d... An integrated system has been provided with a-Si/H solar cells as energy conversion device,NiCo2O4battery-supercapacitor hybrid(BSH)as energy storage device,and light emitting diodes(LEDs)as energy utilization device.By designing three-dimensional hierarchical NiCo2O4arrays as faradic electrode,with capacitive electrode of active carbon(AC),BSHs were assembled with energy density of 16.6 Wh kg-1,power density of 7285 W kg-1,long-term stability with 100%retention after 15,000 cycles,and rather low self-discharge.The NiCo2O4//AC BSH was charged to 1.6 V in 1 s by solar cells and acted as reliable sources for powering LEDs.The integrated system is rational for operation,having an overall efficiency of 8.1%with storage efficiency of 74.24%.The integrated system demonstrates a stable solar power conversion,outstanding energy storage behavior,and reliable light emitting.Our study offers a precious strategy to design a self-driven integrated system for highly efficient energy utilization. 展开更多
关键词 Integrated system NiCo2O4 Battery-supercapacitor hybrid devices Self-driving LED
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A Universal Principle to Accurately Synthesize Atomically Dispersed Metal–N_4 Sites for CO_2 Electroreduction 认领 引用 被引量：14
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作者 Wanzhen Zheng Feng Chen +7 位作者 Qi Zeng Zhongjian Li Bin Yang Lecheng Lei Qinghua Zhang Feng He Xilin Wu Yang Hou 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第9期14-25,共12页
Atomically dispersed metal-nitrogen sites-anchored carbon materials have been developed as effective catalysts for CO2 electroreduction(CO2 ER),but they still suffer from the imprecisely control of type and coordinati... Atomically dispersed metal-nitrogen sites-anchored carbon materials have been developed as effective catalysts for CO2 electroreduction(CO2 ER),but they still suffer from the imprecisely control of type and coordination number of N atoms bonded with central metal.Herein,we develop a family of single metal atom bonded by N atoms anchored on carbons(SAs-M-N-C,M=Fe,Co,Ni,Cu)for CO2 ER,which composed of accurate pyrrole-type M-N4 structures with isolated metal atom coordinated by four pyrrolic N atoms.Benefitting from atomically coordinated environment and specific selectivity of M-N4 centers,SAs-Ni-N-C exhibits superior CO2 ER performance with onset potential of-0.3 V,CO Faradaic efficiency(F.E.) of 98.5%at-0.7 V,along with low Tafel slope of 115 mV dec-1 and superior stability of 50 h,exceeding all the previously reported M-N-C electrocatalysts for CO2-to-CO conversion.Experimental results manifest that the different intrinsic activities of M-N4 structures in SAs-M-N-C result in the corresponding sequence of Ni> Fe> Cu> Co for CO2 ER performance.An integrated Zn-CO2 battery with Zn foil and SAs-Ni-N-C is constructed to simultaneously achieve CO2-to-CO conversion and electric energy output,which delivers a peak power density of 1.4 mW cm-2 and maximum CO F.E.of 93.3%. 展开更多
关键词 Atomic dispersion Pyrrole-type metal–N4 structure Catalytic site CO2 electroreduction Zn–CO2 battery
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Ultrahigh-resolution on-chip spectrometer with silicon photonic resonators 认领 引用 被引量：13
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作者 Long Zhang Ming Zhang +3 位作者 Tangnan Chen Dajian Liu Shihan Hong Daoxin Dai 《Opto-Electronic Advances》 SCIE EI CAS 2022年第7期1-9,共9页
A compact spectrometer on silicon is proposed and demonstrated with an ultrahigh resolution.It consists of a thermally-tunable ultra-high-Q resonator aiming at ultrahigh resolution and an array of wideband resonators ... A compact spectrometer on silicon is proposed and demonstrated with an ultrahigh resolution.It consists of a thermally-tunable ultra-high-Q resonator aiming at ultrahigh resolution and an array of wideband resonators for achieving a broadened working window.The present on-chip spectrometer has a footprint as compact as 0.35 mm2,and is realized with standard multi-project-wafer foundry processes.The measurement results show that the on-chip spectrometer has an ultra-high resolution Δλ of 5 pm and a wide working window of 10 nm.The dynamic range defined as the ratio of the working window and the wavelength resolution is as large as 1940,which is the largest for on-chip dispersive spectro-meters to the best of our knowledge.The present high-performance on-chip spectrometer has great potential for high-resolution spectrum measurement in the applications of gas sensing,food monitoring,health analysis,etc. 展开更多
关键词 integrated photonics silicon spectrometer resonator
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Regulating adsorption ability toward polysulfides in a porous carbon/Cu3P hybrid for an ultrastable high-temperature lithium-sulfur battery 认领 引用 被引量：11
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作者 Yichuan Guo Rabia Khatoon +8 位作者 Jianguo Lu Qinggang He Xiang Gao Xiaopeng Yang Xun Hu Yang Wu Jiale Lian Zhoupeng Li Zhizhen Ye 《Carbon Energy》 SCIE CAS CSCD 2021年第6期841-855,共15页
Lithium-sulfur batteries(LSBs)can work at high temperatures,but they suffer from poor cycle life stability due to the“shuttle effect”of polysulfides.In this study,pollen-derived porous carbon/cuprous phosphide(PC/Cu... Lithium-sulfur batteries(LSBs)can work at high temperatures,but they suffer from poor cycle life stability due to the“shuttle effect”of polysulfides.In this study,pollen-derived porous carbon/cuprous phosphide(PC/Cu3P)hybrids were rationally synthesized using a one-step carbonization method using pollen as the source material,acting as the sulfur host for LSBs.In the hybrid,polar Cu3P can markedly inhibit the“shuttle effect”by regulating the adsorption ability toward polysulfides,as confirmed by theoretical calculations and experimental tests.As an example,the camellia pollen porous carbon(CPC)/Cu3P/S electrode shows a high capacity of 1205.6 mAh g−1 at 0.1 C,an ultralow capacity decay rate of 0.038%per cycle after 1000 cycles at 1 C,and a rather high initial Coulombic efficiency of 98.5%.The CPC/Cu3P LSBs can work well at high temperatures,having a high capacity of 545.9 mAh g−1 at 1 C even at 150℃.The strategy of the PC/Cu3P hybrid proposed in this study is expected to be an ideal cathode for ultrastable high-temperature LSBs.We believe that this strategy is universal and worthy of in-depth development for the next generation energy storage devices. 展开更多
关键词 density functional theory calculation high operating temperature lithium-sulfur battery polysulfide adsorption porous carbon/Cu3P hybrid ultrastability
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Bi/Bi2O3 nanoparticles supported on N-doped reduced graphene oxide for highly efficient CO2 electroreduction to formate 认领 引用 被引量：8
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作者 Junjie Sun Wanzhen Zheng +5 位作者 Siliu Lyu Feng He Bin Yang Zhongjian Li Lecheng Lei Yang Hou 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第6期1415-1421,F0002,共7页
Electrocatalytic CO2 reduction(CO2 ER)into formate is a desirable route to achieve efficient transformation of CO2 to value-added chemicals,however,it still suffers from limited catalytic activity and poor selectivity... Electrocatalytic CO2 reduction(CO2 ER)into formate is a desirable route to achieve efficient transformation of CO2 to value-added chemicals,however,it still suffers from limited catalytic activity and poor selectivity.Herein,we develop a hybrid electrocatalyst composed of bismuth and bismuth oxide nanoparticles(NPs)supported on nitrogen-doped reduced graphene oxide(Bi/Bi2 O3/NrGO)nanosheets prepared by a combined hydrothermal with calcination treatment.Thanks to the combination of undercoordinated sites and strong synergistic effect between Bi and Bi2 O3,Bi/Bi2 O3/NrGO-700 hybrid displays a promoted CO2 ER catalytic performance and selectivity for formate production,as featured by a small onset potential of-0.5 V,a high current density of-18 mA/cm2,the maximum Faradaic efficiency of85%at-0.9 V,and a low Tafel slope of 166 mV/dec.Experimental results reveal that the higher CO2 ER performance of Bi/Bi2 O3/NrGO-700 than that of Bi NPs supported on NrGO(Bi/NrGO)can be due to the partial reduction of Bi2 O3 NPs into Bi,which significantly increases undercoordinated active sites on Bi NPs surface,thus boosting its CO2 ER performance.Furthermore,a two-electrode device with Ir/C anode and Bi/Bi2 O3/NrGO-700 cathode could be integrated with two alkaline batteries or a planar solar cell to achieve highly active water splitting and CO2 ER. 展开更多
关键词 NrGO Bi/Bi2O3 CO2 electroreduction Formate Hybrid catalysts
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Nanocarbon-Enhanced 2D Photoelectrodes:A New Paradigm in Photoelectrochemical Water Splitting 认领 引用 被引量：9
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作者 Jun Ke Fan He +9 位作者 Hui Wu Siliu Lyu Jie Liu Bin Yang Zhongjian Li Qinghua Zhang Jian Chen Lecheng Lei Yang Hou Kostya Ostrikov 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第2期45-73,共29页
Solar-driven photoelectrochemical(PEC)water splitting systems are highly promising for converting solar energy into clean and sustainable chemical energy.In such PEC systems,an integrated photoelectrode incorporates a... Solar-driven photoelectrochemical(PEC)water splitting systems are highly promising for converting solar energy into clean and sustainable chemical energy.In such PEC systems,an integrated photoelectrode incorporates a light harvester for absorbing solar energy,an interlayer for transporting photogenerated charge carriers,and a co-catalyst for triggering redox reactions.Thus,understanding the correlations between the intrinsic structural properties and functions of the photoelectrodes is crucial.Here we critically examine various 2D layered photoanodes/photocathodes,including graphitic carbon nitrides,transition metal dichalcogenides,layered double hydroxides,layered bismuth oxyhalide nanosheets,and MXenes,combined with advanced nanocarbons(carbon dots,carbon nanotubes,graphene,and graphdiyne)as co-catalysts to assemble integrated photoelectrodes for oxygen evolution/hydrogen evolution reactions.The fundamental principles of PEC water splitting and physicochemical properties of photoelectrodes and the associated catalytic reactions are analyzed.Elaborate strategies for the assembly of 2D photoelectrodes with nanocarbons to enhance the PEC performances are introduced.The mechanisms of interplay of 2D photoelectrodes and nanocarbon co-catalysts are further discussed.The challenges and opportunities in the field are identified to guide future research for maximizing the conversion efficiency of PEC water splitting. 展开更多
关键词 Advanced nanocarbons Co-catalysts 2D layered structure Integrated photoelectrodes Photoelectrochemical water splitting
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Phenolic profile of jujube fruit subjected to gut microbiota fermentation and its antioxidant potential against ethyl carbamateinduced oxidative damage 认领 引用 被引量：4
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作者 Tao BAO Ming ZHANG +1 位作者 Yuanqing ZHOU Wei CHEN 《Journal of Zhejiang University-SCIENCE B》 SCIE CAS CSCD 2021年第5期397-409,共13页
Objective:To evaluate the composition of bioactive substances and the antioxidant effects of jujube fruit under gut microbiota fermentation(GMF),and the inhibitory effect on cytotoxicity caused by ethyl carbamate(EC).... Objective:To evaluate the composition of bioactive substances and the antioxidant effects of jujube fruit under gut microbiota fermentation(GMF),and the inhibitory effect on cytotoxicity caused by ethyl carbamate(EC).Methods:Changes in the contents of flavonoids,polyphenols,total sugars,and reducing sugars of jujube fruit after GMF(0,2,6,12,24,and 48 h)were determined.The oxidation resistance of fermented jujube fruits(from 0 to 48 h fermentation)was evaluated using in vitro 2,2'-azinobis-(3-ethylbenzthiazoline-6-sulphonate)(ABTS)and ferric reducing antioxidant power(FRAP)assays.Inhibitory effects of 48 h-fermented jujube fruit at various concentrations(0.25,0.50,1.00,and 2.00 mg/mL)on EC-treated toxicity and DNA damage of Caco-2 cells were estimated using 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2H-tetrazolium bromide(MTT)and nuclear staining assays,respectively.Effects of different concentrations of jujube fruit on EC-treated Caco-2 cells’intracellular reactive oxygen species(ROS),glutathione(GSH)levels,and mitochondrial membrane potential(MMP)were also evaluated.Results:Jujube fruit has rich bioactive components after GMF and shows strong antioxidant capacity.Fermented jujube fruit can inhibit the cytotoxicity and DNA damage of Caco-2 cells caused by EC and reduce intracellular ROS generation,as well as restoring GSH and MMP.Conclusions:Fermented jujube fruit extracts produced by GMF still contain biologically active substances which retain biological activity and antioxidation capabilities. 展开更多
关键词 Jujube Gut microbiota fermentation Polyphenols Ethyl carbamate Antioxidant activity
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Ocean Observation Technologies:A Review 认领 引用 被引量：12
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作者 Mingwei Lin Canjun Yang 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2020年第2期25-42,共18页
Covering about three quarters of the surface area of the earth,the ocean is a critical source of sustenance,medicine,and commerce.However,such vast expanse in both surface area and depth,presents myriad observing chal... Covering about three quarters of the surface area of the earth,the ocean is a critical source of sustenance,medicine,and commerce.However,such vast expanse in both surface area and depth,presents myriad observing challenges for researchers,such as corrosion,attenuation of electromagnetic waves,and high pressure.Ocean observation technologies are progressing from the conventional single node,static and short-term modalities to multiple nodes,dynamic and long-term modalities,to increase the density of both temporal and spatial samplings.Although people’s knowledge of the oceans has been still quite limited,the contributions of many nations cooperating to develop the Global Ocean Observing System(GOOS)have remarkably promoted the development of ocean observing technologies.This paper reviews the typical observing technologies deployed from the sea surface to the seafloor,and discusses the future trend of the ocean observation systems with the docking technology and sustained ocean energy. 展开更多
关键词 Ocean observation Observatory Sampling Underwater Ocean energy AUV Docking Recharging
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MYB41,MYB107,and MYC2 promote ABA-mediated primary fatty alcohol accumulation via activation of AchnFAR in wound suberization in kiwifruit 认领 引用 被引量：3
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作者 Xiaopeng Wei Linchun Mao +2 位作者 Xiaobo Wei Ming Xia Changjie Xu 《Horticulture Research》 SCIE 2020年第1期1666-1675,共10页
Wound damage triggers the accumulation of abscisic acid(ABA),which induces the expression of a large number of genes involved in wound suberization in plants.Fatty acyl-CoA reductase(FAR)catalyzes the generation of pr... Wound damage triggers the accumulation of abscisic acid(ABA),which induces the expression of a large number of genes involved in wound suberization in plants.Fatty acyl-CoA reductase(FAR)catalyzes the generation of primary fatty alcohols by the reduction of fatty acids in suberin biosynthesis.However,the regulatory effects of transcription factors(TFs)on AchnFAR in response to ABA are unexplored.In this study,kiwifruit AchnFAR displayed a biological function analogous to that of FAR in transiently overexpressed tobacco(Nicotiana benthamiana)leaves.The positive role of TFs,including AchnMYB41,AchnMYB107,and AchnMYC2,in the regulation of AchnFAR was identified.The three TFs could individually bind to the AchnFAR promoter to activate gene transcription in yeast one-hybrid and dualluciferase assays.Transient overexpression of TFs in tobacco leaves resulted in the upregulation of aliphatic synthesis genes(including FAR)and the increase in aliphatics,including primary alcohols,α,ω-diacids,ω-hydroxyacids,and fatty acids.Moreover,exogenous ABA treatment elevated TF-mediated AchnFAR expression and the accumulation of primary alcohols.Conversely,fluridone,an inhibitor of ABA biosynthesis,suppressed the expression of AchnFAR and TF genes and reduced the formation of primary alcohols.The results indicate that AchnMYB41,AchnMYB107,and AchnMYC2 activate AchnFAR transcription to promote ABA-mediated primary alcohol formation in wound suberization in kiwifruit. 展开更多
关键词 wound mediated elevated
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Nitrogen-doped carbon nanotube-encapsulated nickel nanoparticles assembled on graphene for efficient CO2 electroreduction 认领 引用 被引量：2
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作者 Tingting Wang Jian Yang +7 位作者 Jiayi Chen Qinggang He Zhongjian Li Lecheng Lei Jianguo Lu Michael K.H.Leung Bin Yang Yang Hou 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第6期1438-1442,共5页
Exploring 3 D hybrid nanocarbons encapsulated with metal nanoparticles(NPs)are recently considered as emerging catalysts for boosting CO2 electroreduction reaction(CRR)under practical and economic limits.Herein,we rep... Exploring 3 D hybrid nanocarbons encapsulated with metal nanoparticles(NPs)are recently considered as emerging catalysts for boosting CO2 electroreduction reaction(CRR)under practical and economic limits.Herein,we report a one-step pyrolysis strategy for fabricating N-doped carbon nanotube(CNT)-encapsulated Ni NPs assembled on the surface of graphene(N/NiNPs@CNT/G)to efficiently convert CO2 into CO.In such 3 D hybrid,the particle size of Ni NPs that coated by five graphitic carbon layers is less than 100 nm,and the amount of N dopants introduced into graphene with countable CNTs is determined to 7.27 at%.Thanks to unique CNT-encapsulated Ni NPs structure and N dopants,the achieved N/NiNPs@CNT/G hybrid displays an exceptional CRR activity with a high Faradaic efficiency of 97.7%and large CO partial current density of 7.9 mA/cm2 at-0.7 V,which outperforms those reported metallic NPs loaded carbon based CRR electrocatalysts.Further,a low Tafel slope of 134 mV/dec,a turnover frequency of 387.3 CO/h at-0.9 V,and tiny performance losses during long-term CRR operation are observed on N/NiNPs@CNT/G.Experimental observations illustrate that the Ni NPs encapsulated by carbon layers along with N dopants are of great importance in the conversion of CO2 into CO with high current density. 展开更多
关键词 CO2 electroreduction Graphene nanosheets Ni nanoparticles N dopants 3D hybrid
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Robustness optimization for rapid prototyping of functional artifacts based on visualized computing digital twins 认领 引用 被引量：2
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作者 Jinghua Xu Kunqian Liu +5 位作者 Linxuan Wang Hongshuai Guo Jiangtao Zhan Xiaojian Liu Shuyou Zhang Jianrong Tan 《Visual Computing for Industry,Biomedicine,and Art》 EI 2023年第1期33-50,共18页
This study presents a robustness optimization method for rapid prototyping(RP)of functional artifacts based on visualized computing digital twins(VCDT).A generalized multiobjective robustness optimization model for RP... This study presents a robustness optimization method for rapid prototyping(RP)of functional artifacts based on visualized computing digital twins(VCDT).A generalized multiobjective robustness optimization model for RP of scheme design prototype was first built,where thermal,structural,and multidisciplinary knowledge could be integrated for visualization.To implement visualized computing,the membership function of fuzzy decision-making was optimized using a genetic algorithm.Transient thermodynamic,structural statics,and flow field analyses were conducted,especially for glass fiber composite materials,which have the characteristics of high strength,corrosion resistance,temperature resistance,dimensional stability,and electrical insulation.An electrothermal experiment was performed by measuring the temperature and changes in temperature during RP.Infrared thermographs were obtained using thermal field measurements to determine the temperature distribution.A numerical analysis of a lightweight ribbed ergonomic artifact is presented to illustrate the VCDT.Moreover,manufacturability was verified based on a thermal-solid coupled finite element analysis.The physical experiment and practice proved that the proposed VCDT provided a robust design paradigm for a layered RP between the steady balance of electrothermal regulation and manufacturing efficacy under hybrid uncertainties. 展开更多
关键词 Robustness optimization design Rapid prototyping Functional artifacts Fuzzy decision-making Infrared thermographs Visualized computing digital twins
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