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Enhanced recovery of high-purity Fe powder from iron-rich electrolytic manganese residue by slurry electrolysis
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作者 Wenxing Cao Jiancheng Shu +5 位作者 jiaming chen Zihan Li Songshan Zhou Shushu Liao Mengjun chen Yong Yang 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2024年第3期531-538,共8页
Iron-rich electrolytic manganese residue(IREMR)is an industrial waste produced during the processing of electrolytic metal manganese,and it contains certain amounts of Fe and Mn resources and other heavy metals.In thi... Iron-rich electrolytic manganese residue(IREMR)is an industrial waste produced during the processing of electrolytic metal manganese,and it contains certain amounts of Fe and Mn resources and other heavy metals.In this study,the slurry electrolysis technique was used to recover high-purity Fe powder from IREMR.The effects of IREMR and H2SO4 mass ratio,current density,reaction temper-ature,and electrolytic time on the leaching and current efficiencies of Fe were studied.According to the results,high-purity Fe powder can be recovered from the cathode plate,and the slurry electrolyte can be recycled.The leaching efficiency,current efficiency,and purity of Fe reached 92.58%,80.65%,and 98.72wt%,respectively,at a 1:2.5 mass ratio of H2SO4 and IREMR,reaction temperature of 60℃,electric current density of 30 mA/cm^(2),and reaction time of 8 h.In addition,vibrating sample magnetometer(VSM)analysis showed that the coercivity of electrolytic iron powder was 54.5 A/m,which reached the advanced magnetic grade of electrical pure-iron powder(DT4A coercivity standard).The slurry electrolytic method provides fundamental support for the industrial application of Fe resource recovery in IRMER. 展开更多
关键词 iron-rich electrolytic manganese residue slurry electrolysis high-purity iron powder leaching efficiency current efficiency
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Enhanced protective effect of selenium-biofortified peptide RYNA(Se)MNDYT compared with its native peptide RYNAMNDYT in lipopolysaccharide-injured murine gut microbiota
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作者 Shujian Wu Zhenjun Zhu +9 位作者 Mengfei chen Aohuan Huang Yizhen Xie jiaming chen Liang Xue Moutong chen Jumei Zhang Juan Wang Qingping Wu Yu Ding 《Food Science and Human Wellness》 SCIE CAS CSCD 2024年第6期3391-3402,共12页
Selenopeptides may be a valuable bioactive compound to promote gut microbiota-targeted therapeutic methods for intestinal disease and hepatopathy.However,limited information is available on the utilization of selenope... Selenopeptides may be a valuable bioactive compound to promote gut microbiota-targeted therapeutic methods for intestinal disease and hepatopathy.However,limited information is available on the utilization of selenopeptides by gut microbiota,especially Selenium(Se)function.For this purpose,the present study aimed to investigate the protective effect of selenopeptide(RYNA(Se)MNDYT,Se-P2,purity of≥95%)and its original peptide(RYNAMNDYT,P2,purity of≥95%)in vivo by the microbiota-metabolite axis and further analyze the potential contribution of Se biofortification to Se-P2 bioactivity.The results showed that Se-P2 exhibits a higher protective effect on lipopolysaccharide(LPS)-induced inflammation than P2,including pathology of the colon and liver,which suggested that the bioactivity of P2 was promoted by the organic combination of Se.Notably,gut microbiota composition tended to be a healthy structure by Se-P2 pretreatment in LPS-injured mice,which had a positive effect on LPS-induced gut microbiota dysbacteriosis.Additionally,only Se-P2 promoted an increase in the relative abundance of Lactobacillus,Alistipes,and Roseburia and a decrease in the relative abundance of Akkermansia,Erysipelatoclostridium,and Bacteroides in LPS-injured mice.The changes in gut microbiota were obviously correlated with the changes in metabolites and affected the metabolic pathways of valine,leucine,isoleucine,phenylalanine,tyrosine,and tryptophan biosynthesis and phenylalanine metabolism.This may be one of the key reasons for Se-P2 to exert bioactivity through the microbiota-metabolite axis.Furthermore,Se-biofortification in Se-enriched Cordyceps militaris affected the parental proteins of Se-P2 to modulate mitogen-activated protein kinase,GPI anchored protein,and carbohydrate metabolism,translation,folding,sorting and degradation,which may contribute to the bioactivity of Se-P2.Our study provides information on the effect of Se on selenopeptides in vivo,which further promotes the prospective applications of selenopeptides as dietary supplements. 展开更多
关键词 Selenopeptide Gut microbiota Metabolites Selenium biofortification Proteomics
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Direct observation of the distribution of impurity in phosphorous/boron co-doped Si nanocrystals
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作者 李东珂 韩俊楠 +7 位作者 孙腾 陈佳明 Etienne Talbot Rémi Demoulin 陈王华 皮孝东 徐骏 陈坤基 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第12期454-458,共5页
Doping in Si nanocrystals is an interesting topic and directly studying the distribution of dopants in phosphorous/boron co-doping is an important issue facing the scientific community.In this study,atom probe tomogra... Doping in Si nanocrystals is an interesting topic and directly studying the distribution of dopants in phosphorous/boron co-doping is an important issue facing the scientific community.In this study,atom probe tomography is performed to study the structures and distribution of impurity in phosphorous/boron co-doped Si nanocrystals/SiO_(2) multilayers.Compared with phosphorous singly doped Si nanocrystals,it is interesting to find that the concentration of phosphorous in co-doped samples can be significantly improved.Theoretical simulation suggests that phosphorous-boron pairs are formed in co-doped Si nanocrystals with the lowest formation energy,which also reduces the formation energy of phosphorous in Si nanocrystals.The results indicate that co-doping can promote the entry of phosphorous impurities into the near-surface and inner sites of Si nanocrystals,which provides an interesting way to regulate the electronic and optical properties of Si nanocrystals such as the observed enhancement of conductivity and sub-band light emission. 展开更多
关键词 Si nanocrystals phosphorous and boron CO-DOPING impurity distribution
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Feasible strategies for studying the involvement of DNA methylation and histone acetylation in the stress-induced formation of quality-related metabolites in tea(Camellia sinensis) 被引量:1
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作者 Jie Yang Dachuan Gu +5 位作者 Shuhua Wu Xiaochen Zhou jiaming chen Yinyin Liao Lanting Zeng Ziyin Yang 《Horticulture Research》 SCIE 2021年第1期3368-3380,共13页
Tea plants are subjected to multiple stresses during growth,development,and postharvest processing,which affects levels of secondary metabolites in leaves and influences tea functional properties and quality.Most stud... Tea plants are subjected to multiple stresses during growth,development,and postharvest processing,which affects levels of secondary metabolites in leaves and influences tea functional properties and quality.Most studies on secondary metabolism in tea have focused on gene,protein,and metabolite levels,whereas upstream regulatory mechanisms remain unclear.In this review,we exemplify DNA methylation and histone acetylation,summarize the important regulatory effects that epigenetic modifications have on plant secondary metabolism,and discuss feasible research strategies to elucidate the underlying specific epigenetic mechanisms of secondary metabolism regulation in tea.This information will help researchers investigate the epigenetic regulation of secondary metabolism in tea,providing key epigenetic data that can be used for future tea genetic breeding. 展开更多
关键词 metabolism INVOLVEMENT UPSTREAM
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Study on the Anti-aging Efficacy of the Active Ingredients in Aqueous Extract of Ganoderma lucidum
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作者 Shouyao HUANG Chunwei JIAO +5 位作者 Huijia LIANG Yongshan YANG jiaming chen Minglong ZHANG Yaqi HONG Yizhen XIE 《Agricultural Biotechnology》 CAS 2015年第5期73-76,共4页
[ Objective ] The research aimed to develop anti-aging masks with aqueous extracts of Ganoderma lucidum and to study the clinical efficacy on the delaying of skin aging. [Method] The anti-aging efficacy of the aqueous... [ Objective ] The research aimed to develop anti-aging masks with aqueous extracts of Ganoderma lucidum and to study the clinical efficacy on the delaying of skin aging. [Method] The anti-aging efficacy of the aqueous extract of C.anoderrna luciclum was evaluated by sensory evaluation, safety evaluation, instrumental measurements, etc. [ Result] The results of sensory evaluation showed that after continuous application of the test materials for 12 weeks, the skin dryness, elasticity, surface sheen, fine wrinkles and smoothness were well improved, and the improvement rates were 9l. 17%, 91.17% , 94.12% , 11.76% and 91.18% , respectively. The measurement results by specialized instrument showed that the skin hydration on the target site increased continuously with the prolonging of the using time. Significant differences existed between each time point after using the products and the time before using. There was no signiScant difference existed in elasticity index 112 and R5 compared with before using. [Result] Clinical data showed that the active ingredients in aqueous extract of Ganoderma lucidum had a certain effect on the delaying of skin aging. 展开更多
关键词 Aqueous extract of Ganoderma lucidum Active ingredient Antiaging of skin Clinical study
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高速列车过隧道产生压力波的三维特性
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作者 王田天 陈嘉铭 +7 位作者 王军彦 施方成 张雷 钱博森 姜琛 王家斌 王钰 杨明智 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2024年第2期75-88,共14页
本文采用滑移网格法模拟了时速350 km的高速列车通过350 m标准单线隧道,研究了列车前方不同隧道横截面的压力分布,基于等压力曲面描述了压力波的三维特征和传播机理,并提出了一种新式精确的压力传感器布置方案.研究结果表明,隧道横截面... 本文采用滑移网格法模拟了时速350 km的高速列车通过350 m标准单线隧道,研究了列车前方不同隧道横截面的压力分布,基于等压力曲面描述了压力波的三维特征和传播机理,并提出了一种新式精确的压力传感器布置方案.研究结果表明,隧道横截面距离列车车头越远,平面压力差异越小.受列车车头和隧道横截面形状的影响,压力波不是简单的平面波,而是在传播过程中复杂变化的球面波.以隧道断面的压力差异小于1 Pa来定义平面波,可发现平面波出现在列车前方16.6 m附近.此外,在70-90 m的隧道断面上,隧道壁面测点和建筑限界测点之间的压力峰峰值差异可达13%,因此应将压力传感器布置在附属设施表面而不是隧道壁面.综上所述,本研究对于理解压力波的形成和传播机理以及指导隧道内压力传感器的科学布置具有重要意义. 展开更多
关键词 高速列车 隧道断面 建筑限界 单线隧道 传播机理 横截面形状 压力波 压力传感器
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Dietary fiber and microbiota interaction regulates sow metabolism and reproductive performance 被引量:6
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作者 Min Tian jiaming chen +3 位作者 Jiaxin Liu Fang chen Wutai Guan Shihai Zhang 《Animal Nutrition》 SCIE 2020年第4期397-403,共7页
Dietary fiber is a critical nutrient in sow diet and has attracted interest of animal nutritionists for many years.In addition to increase sows’satiety,dietary fiber has been found to involve in the regulation of mul... Dietary fiber is a critical nutrient in sow diet and has attracted interest of animal nutritionists for many years.In addition to increase sows’satiety,dietary fiber has been found to involve in the regulation of multiple biological functions in the sow production.The interaction of dietary fiber and gut microbes can produce bioactive metabolites,which are of great significance to sows’metabolism and reproductive performance.This article reviewed the interaction between dietary fiber and gut microbes in regulating sows’gut microbial diversity,intestinal immune system,lactation,and production performance,with the aim to provide a new strategy for the use of dietary fiber in sow diets. 展开更多
关键词 Dietary fiber Gut microbe Reproductive performance SOW
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Ultrafast photocarrier and coherent phonon dynamics in type-II Dirac semimetal PtTe2 thin films probed by optical spectroscopy 被引量:1
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作者 Peng Suo Shengnan Yan +9 位作者 Ruihua Pu Wenjie Zhang Di Li jiaming chen Jibo Fu Xian Lin Feng Miao Shi-Jun Liang Weimin Liu Guohong Ma 《Photonics Research》 SCIE EI CAS CSCD 2022年第3期653-661,共9页
We report the ultrafast photocarrier dynamics and coherent phonon excitation in type-II Dirac semimetal platinum ditelluride(PtTe2)thin films via femtosecond(fs)pump-probe spectroscopy at room temperature.Quantitative... We report the ultrafast photocarrier dynamics and coherent phonon excitation in type-II Dirac semimetal platinum ditelluride(PtTe2)thin films via femtosecond(fs)pump-probe spectroscopy at room temperature.Quantitative analysis revealed that the incoherent electronic relaxation consists of two components:a subpicosecond fast relaxation process and a slow component with a time constant of hundreds of picoseconds(ps).Furthermore,the launch of a coherent acoustic phonon(CAP)in the 20 nm film but absence in the 6.8 nm film uncovers the dominant role of temperature gradient in producing a strain wave.The sound velocity and Young’s modulus in the thick PtTe_(2) are determined to be 1.736 km/s and 29.5 GPa,respectively.In addition,the coherent optical phonon(COP)with a frequency of 4.7 THz corresponding to Te atoms out-of-plane A1g vibration has been well resolved in all films,which is ascribed to displacive excitation of coherent phonon(DECP).The observation of a strong probe-wavelength dependent COP amplitude reveals the resonant feature of the optical excitation-induced atomic displacement in PtTe2.Our findings provide deep insight into the excitation and dynamics of CAP and COP as well as the photocarriers’recovery pathway and lifetimes in PtTe_(2).Our study also demonstrates that the COP spectroscopy is a powerful tool to reveal the modulation of frequency-dependent optical constants induced by atomic vibrations,which may find applications in the fields of optoelectronics and ultrafast photonics. 展开更多
关键词 coherent PHONON EXCITATION
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An anti-interference detection algorithm for parking monitoring systems
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作者 Ani Dong Zusheng Zhang jiaming chen 《International Journal of Intelligent Computing and Cybernetics》 EI 2019年第4期481-496,共16页
Purpose–Magnetic sensors have recently been proposed for parking occupancy detection.However,there has adjacent interference problem,i.e.the magnetic signal is easy to be interfered by the vehicles which are parking ... Purpose–Magnetic sensors have recently been proposed for parking occupancy detection.However,there has adjacent interference problem,i.e.the magnetic signal is easy to be interfered by the vehicles which are parking on adjacent spaces.The purpose of this paper is to propose a sensing algorithm to eliminate the adjacent interference.Design/methodology/approach–The magnetic signals are converted to the pattern representation sequences,and the similarity is calculated using the pattern distance.The detection algorithm includes two levels:local decision and data fusion.In the local decision level,the sampled signals can be divided into three classes:vacant,occupied and uncertain.Then a collaborative decision is used to fusion the signals which belong to the uncertain class for the second level.Findings–An experiment system included 60 sensor nodes that were deployed on bay parking spaces.Experiment results show that the proposed algorithm has better detection accuracy than existing algorithms.Originality/value–This paper proposes a data fusion algorithm to eliminate adjacent interference.To balance the energy consumption and detection accuracy,the algorithm includes two levels:local decision and data fusion.In most of cases,the local decision can obtain the accurate detection result.Only the signals that cannot be correctly detected at the local level need data fusion operation. 展开更多
关键词 INTERFERENCE Sensor networks Data fusion Parking detection
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A dataset of lake level changes in China between 2002 and 2023 using multi-altimeter data
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作者 Shanmu Ma Jingjuan Liao +1 位作者 Ruofan Jing jiaming chen 《Big Earth Data》 EI 2024年第1期166-188,共23页
Lake water levels are an important indicator of water balance and water cycles,and are essential for climate and environmental change studies and water resource evaluation.Currently,lake level measurements are scarce ... Lake water levels are an important indicator of water balance and water cycles,and are essential for climate and environmental change studies and water resource evaluation.Currently,lake level measurements are scarce or inconsistent throughout the country,and traditional gauge measurements of many lakes are not feasible,so satellite altimetry is a vital alternative to gauge lake levels.However,the accuracy and sam-pling frequency of lake level time series are usually low because of time and space coverage limitations;therefore,it is necessary to utilize multialtimeter data to monitor lake levels and obtain lake level changes over long time series.In this study,we extracted the water level changes in 988 lakes(>10 km^(2))in China between 2002 and 2023 based on ICESat/-2,Cryosat-2,Jason-1/2/3,and Sentinel-3A/3B altimetry data using waveform retracking,lake level extraction,lake level time series construction,the fusion of multi-altimeter lake level time series,and outlier removal.A total of 55%of the lakes in this dataset have been monitored for more than 10 years,and 34%have more than 12 times the annual average water level monitoring.At the same time,in situ data from 21 lakes were used for validation,and the average root mean square error(RMSE)for each of the datasets of ICESat/-2,Cryosat-2,Jason-1/2/3,and Sentinel-3A/3B versus the in situ lake levels are 0.223 m,0.163 m,0.207 m,0.596 m,0.295 m,0.275 m,0.243 m,and 0.317 m,respectively,and the mean RMSE of the fused lake levels reaches 0.332 m.During the monitoring period,the water levels in Chinese lakes generally increased.The overall annual average rate of change at the 20 and 10-year scales was 0.123 m/a and 0.151 m/a,respectively,among which the overall water levels in large lakes increased significantly.The lakes with a faster rate of decline in the water level were primarily small.The water storage in each lake region in China shows an upward trend,with the most significant increase in the Tibetan Plateau region,where the average annual water level change rate has remained above 0.15 m/a over the past two decades.This dataset has high spatiotemporal coverage and accuracy and can support the estimation of changes in lake water storage,analysis of lake level trends,plateau flooding,and the relationship between lake ecosystems and water resources. 展开更多
关键词 Lake level multi-altimeter China spatiotemporal variation
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