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| 1 | Mapping wetland changes in China between 1978 and 2008显示文摘Four wetland maps for all China have been produced,based on Landsat and CBERS-02B remote sensing data between 1978 and 2008 (1978,1990,2000 and 2008).These maps were mainly developed by manual interpretation and validated by substantial field investigation in 2009.Based on these maps,we analyzed the 2008 wetland distribution in China and discussed wetland changes and their drivers over the past 30 years.(i) There were about 324097 km 2 of wetlands in 2008,for which inland marshes or swamps were the most common wetland type (35%),with lakes (26%) second.Most of the wetlands were in Heilongjiang,Inner Mongolia,Qinghai and Tibet,occupying about 55% of the national wetland area.(ii) From 1978 to 2008,China's wetland area continually and significantly decreased,by about 33% based on changes in the wetland map.This was in sharp contrast to the increase in artificial wetlands,which increased by about 122%.Inland marshes accounted for the main loss of total wetlands from 1978 to 2000.From 2000 through 2008,riverine and lacustrine wetlands constituted the main wetland loss.Fortunately however,the rate of wetland loss decreased from 5523 to 831 km 2 /a.(iii) The change ratio of lost natural wetlands (including inland and coastal wetlands) to non-wetlands has decreased slightly over the past 30 years.From 1978 to 1990,nearly all natural wetlands (98%) lost were transformed into non-wetlands.However,the ratio declined to 86% from 1990 to 2000,and to 77% from 2000 to 2008.(iv) All Chinese provinces were divided into three groups according to patterns of wetland changes,which could relate to the driving forces of such changes.Tibet was completely different from other provinces,as it was one representative example in which there was a net wetland increase,because of global warming and decreased human activity since 1990.Increased economic development caused considerable wetland loss in most eastern provinces,and artificial wetlands increased. | NIU ZhenGuo ZHANG HaiYing WANG XianWei YAO WenBo ZHOU DeMin ZHAO KuiYi ZHAO Hui LI NaNa HUANG HuaBing LI CongCong YANG Jun LIU CaiXia LIU Shuang WANG Lin LI Zhan YANG ZhenZhong QIAO Fei ZHENG YaoMin CHEN YanLei SHENG YongWei GAO XiaoHong ZHU WeiHong WANG WenQing WANG Hong WENG YongLing ZHUANG DaFang LIU JiYuan LUO ZhiCai CHENG Xiao GUO ZiQi GONG Peng | 2012 | Chinese Science Bulletin2012，57，22： | 51 |
| 2 | 羟基磷灰石负载金催化丙酮醇与甲醇氧化酯化合成丙酮酸甲酯:酸碱性质的基本作用(英文)显示文摘丙酮醇是一种可由木质纤维素类生物质经分步或快速热裂解获得的主要轻质含氧化合物.本文报道了金基催化剂上,丙酮醇可经氧化酯化反应被选择性转化为重要的精细化学品--丙酮酸甲酯.研究结果表明具有适宜强度和比例酸碱位点的两性载体负载金催化剂能够促进氧化酯化反应进行,同时不加快羟醛缩合缩合和Cannizzaro反应等副反应进行.其中,羟基磷灰石(钙磷比为1.62)负载金催化剂上,丙酮醇转化率为62%,丙酮酸甲酯选择性可达87%. | Yan Wan Congcong Zheng Xianchi Lei Mengqi Zhuang Jinhan Lin Wenda Hu Jing dongLin Shaolong Wan Yong Wang | 2019 | Chinese Journal of Catalysis2019，40，11： | 3 |
| 3 | Dynamic microstructure evolution and mechanical properties of dilute Mg-Al-Ca-Mn alloy during hot rolling显示文摘The dynamic microstructure and texture of dilute Mg-0.50Al-0.71Ca-0.33Mn(wt.%) during hot rolling at two slab temperatures were investigated by electron backscattered diffraction(EBSD) and high resolution transmission electron microscopy(HRTEM). The results show that the development of the rolling microstructures is to first form {10–12} extension twins in the original grains, thereby forming the extension-twinned regions, and then to further form {10–11}-{10–12} double twins and kinks in the extension-twinned regions, and finally to form continuous dynamic recrystallized(continuous DRXed)grains in the double twins and the cross parts of the shear-deformed coarse extension-twinned regions.These extension twins, double twins and kinks show a decisive effect on the formation of rolling texture.The number of {10–11}-{10–12} double twins and resultant the continuous DRX process are strongly affected by the rolling slab temperature and the reduction thickness per pass. By optimizing the rolling conditions, texture and microstructures of the multi-pass rolled Mg-Al-Ca-Mn alloy sheets are successfully modified. Although the total alloy content is only 1.5 wt.%, these Mg-Al-Ca-Mn alloy sheets show much higher strength than the commercial Mg-3Al-1 Zn(wt.%)(AZ31B) sheet. | Shiwei Xu Congcong Zhu Zhanhong Lin Chen Jin S.Kamado K.Oh-ishi Yun Qin | 2022 | Journal of Materials Science & Technology2022，，34： | 2 |
| 4 | Association of assisted reproductive technology, germline de novo mutations and congenital heart defects in a prospective birth cohort study显示文摘Emerging evidence suggests that children conceived through assisted reproductive technology(ART)have a higher risk of congenital heart defects(CHDs)even when there is no family history.De novo mutation(DNM)is a well-known cause of sporadic congenital diseases;however,whether ART procedures increase the number of germline DNM(gDNM)has not yet been well studied.Here,we performed whole-genome sequencing of 1137 individuals from 160 families conceived through ART and 205 families conceived spontaneously.Children conceived via ART carried 4.59 more gDNMs than children conceived spontaneously,including 332 paternal and 1.26 maternal DNMs,after correcting for parental age at conception,cigarette smoking,alcohol drinking,and exercise behaviors.Paternal DNMs in offspring conceived via ART are characterized by C>T substitutions at CpG sites,which potentially affect protein-coding genes and are significantly associated with the increased risk of CHD.In addition,the accumulation of non-coding functional mutations was independently associated with CHD and 87.9% of the mutations were originated from the father.Among ART offspring,infertility of the father was associated with elevated paternal DNMs;usage of both recombinant and urinary follicle-stimulating hormone and high-dosage human chorionic gonadotropin trigger was associated with an increase of maternal DNMs.In sum,the increased gDNMs in offspring conceived by ART were primarily originated from fathers,indicating that ART itself may not be a major reason for the accumulation of gDNMs.Our findings emphasize the importance of evaluating the germline status of the fathers in families with the use of ART. | Cheng Wang Hong Lv Xiufeng Ling Hong Li Feiyang Diao Juncheng Dai Jiangbo Du Ting Chen Qi Xi Yang Zhao Kun Zhou Bo Xu Xiumei Han Xiaoyu Liu Meijuan Peng Congcong Chen Shiyao Tao Lei Huang Cong Liu Mingyang Wen Yangqian Jiang Tao Jiang Chuncheng Lu Wei Wu Di Wu Minjian Chen Yuan Lin Xuejiang Guo Ran Huo Jiayin Liu Hongxia Ma Guangfu Jin Yankai Xia Jiahao Sha Hongbing Shen Zhibin Hu | 2021 | Cell Research2021，31，8： | 2 |
| 5 | Analysis of QTLs for erucic acid and oil content in seeds on A8 chromosome and the linkage drag between the alleles for the two traits in Brassica napus显示文摘The history of canola breeding began with the discovery of germplasm with low erucic acid content in seeds of spring forage cultivar in the 1950's.FAE1 mutations led to a dramatic decrease of the seed erucic acid content in Arabidopsis thaliana.The products of the two FAE1 loci,BnA8.FAE1 and BnC3.FAE1,showed additive effects to the level of erucic acid content in oilseed rape.Previous research believed that the pleiotropy of FAE1 was responsible for the decrease in seed oil content along with the reduction of seed erucic acid content in the modern cultivars.TN DH population was developed from a canola cultivar Tapidor and a Chinese traditional cultivar Ningyou7.The population had been tested in 10 and 11 environments to map QTLs for the erucic acid content and oil content in seeds.As the map resolution increased,a novel QTL for seed erucic acid content was revealed,after Meta-analysis,7 cM away from the most significant seed erucic acid content QTL where BnA8.FAE1 is located.Seven independent QTLs for seed oil content(qOC) were detected around the two seed erucic acid content QTLs(qEA) across 39.20 cM on linkage group A8.Two of the qOCs co-localized with the two qEAs,respectively,and were detected in a single environment.The other five qOCs were detected in 10 of 11 environments independent of qEAs.Alleles from Tapidor in all the QTLs at the 0-39.20 cM region contributed negative effects to either erucic acid content or oil content in seeds.Parallel,geno-typing showed that on 5 of the 7 QTLs regions,Tapidor alleles had the same genotypes with that in 'Liho',the original low seed erucic acid content source.Through rounds of crossbreeding with oil-cropped cultivars and intensive selection for multi generations,Tapidor still had the inferior alleles for low seed oil content from 'Liho',the forage rape.This showed a strong linkage drag of low seed oil content,which was controlled by the five qEA-independent qOCs,with low seed erucic acid content.Ninety cultivars of B.napus from 8 countries were used to analyze the genetic drag with 9 molecular markers located in the QTL confidence intervals(24.04 cM) on linkage group A8.It was noticed that more than 46% of the cultivars with low seed erucic acid content trait remained the genotype of low seed oil content at least in one locus.Backcross and marker-assisted selection could break the genetic drag between the low oil content and erucic acid in seeds in the process for breeding modern high seed oil content canola cultivars. | Zhengying Cao Fang Tian Nian Wang Congcong Jiang Bing Lin Wei Xia Jiaqin Shi Yah Long Chunyu Zhang Jinling Meng | 2010 | Journal of Genetics and Genomics2010，37，4： | 2 |
| 6 | A truncated mutation of MucA in Pseudomonas aeruginosa from a bronchiectasis patient affects T3SS expression and inflammasome activation显示文摘Pseudomonas aeruginosa is an opportunistic pathogen that causes chronic airway infection in bronchiectasis patients and is closely associated with poor prognosis.Strains isolated from chronically infected patients typically have a mucoid phenotype due to the overproduction of alginate.In this study,we isolate a P.aeruginosa strain from the sputum of a patient with bronchiectasis and find that a truncated mutation occurred in mucA,which is named mucA117.mucA117 causes the strain to transform into a mucoid phenotype,downregulates the expression of T3SS and inflammasome ligands such as fliC and allows it to avoid inflammasome activation.The truncated mutation of the MucA protein may help P.aeruginosa escape clearance by the immune system,enabling long-term colonization. | Yanan Liu Lin Du Yongzhang Zhu Xuefei Liu Ning Zhou Congcong Li Qingtian Li Ping He | 2022 | Acta Biochimica et Biophysica Sinica2022，54，11： | 1 |
| 7 | Endothelial Notch activation promotes neutrophil transmigration via downregulating endomucin to aggravate hepatic ischemia/reperfusion injury显示文摘Inflammatory leukocytes infiltration is orchestrated by mechanisms involving chemokines,selectins,addressins and other adhesion molecules derived from endothelial cells(ECs),but how they respond to inflammatory cues and coordinate leukocyte transmigration remain elusive.In this study,using hepatic ischemia/reperfusion injury(HIRI)as a model,we identified that endothelial Notch activation was rapidly and dynamically induced in liver sinusoidal endothelial cells(LSECs)in acute inflammation.In mice with EC-specific Notch activation(NICeCA),HIRI induced exacerbated liver damage.Consistently,endothelial Notch activation enhanced neutrophil infiltration and tumor necrosis factor(TNF)-αexpression in HIRI.Transcriptome analysis and further qRT-PCR as well as immunofluorescence indicated that endomucin(EMCN),a negative regulator of leukocyte adhesion,was downregulated in LSECs from NICeCA mice.EMCN was downregulated during HIRI in wild-type mice and in vitro cultured ECs insulted by hypoxia/re-oxygenation injury.Notch activation in ECs led to increased neutrophil adhesion and transendothelial migration,which was abrogated by EMCN overexpression in vitro.In mice deficient of RBPj,the integrative transcription factor of canonical Notch signaling,although overwhelming sinusoidal malformation aggravated HIRI,the expression of EMCN was upregulated;and pharmaceutical Notch blockade in vitro also upregulated EMCN and inhibited transendothelial migration of neutrophils.The Notch activation-exaggerated HIRI was compromised by blocking LFA-1,which mediated leukocyte adherence by associating with EMCN.Therefore,endothelial Notch signaling controls neutrophil transmigration via EMCN to modulate acute inflammation in HIRI. | Peiran Zhang Kangyi Yue Xinli Liu Xianchun Yan Ziyan Yang Juanli Duan Congcong Xia Xinyuan Xu Mei Zhang Liang Liang Lin Wang Hua Han | 2020 | Science China(Life Sciences)2020，63，3： | 1 |
| 8 | The Formation and Evolution of Uvarovite in UHP Serpentinite and Rodingite and its Constraints on Chromium Mobility in the Oceanic Subduction Zone显示文摘The uvarovite-andradite and uvarovite-andradite-grossular solid-solution series are rare in nature.The discovery of uvarovite-andradite in serpentinite and rodingite from the ultra-high pressure(UHP)metamorphic belt in southwestern Tianshan provided an opportunity to investigate its behavior in the subduction zone.Uvarovite(defined as chromiumgarnet)from serpentinite is homogeneous in a single grain,covering compositions in the uvarovite-andradite solid solution series of Adr_(58-66)Uv_(33-41),with few grossular components.Uvarovite from rodingites contain various Cr_(2)O_(3) contents(1.7-17.9 wt%)and mineral compositions being in the range of Adr_(21-31)Uv_(41-50)Grs_(22-37),Adr_(52-90)Uv_(5-25)Grs_(0-21) and Adr_(19-67)Uv_(3-63)Grs_(13-42).Discontinuous chemical variation of uvarovite from core to rim indicates that uvarovite formed by consuming andradite and chromite,which could provide Ca,Cr,Al and Fe.Raman signals of water were identified for uvarovite from both serpentinite and rodingite,with high water content in uvarovite from serpentinite.The high pressure mineral assemblage,as well as the association with perovskite,indicated that the studied uvarovite from serpentinite and rodingite was formed through high pressure metamorphism,during the subduction zone serpentinization and rodingitization.High alkaline and highly reduced fluids released from serpentinization or rodingitization in the oceanic subduction zone promote the mobility of chromium and enable its long-distance migration. | ZHANG Cong SHEN Tingting ZHANG Lifei LIN Congcong ZHANG Zhongwei Qin Xueqing HU Han QIU Tian XIANG Zhenqun ZHANG Jianxin | 2021 | Acta Geologica Sinica(English Edition)2021，95，5： | 1 |
| 9 | Interaction tonal noise generated by contra-rotating open rotors显示文摘Fast and accurate prediction of sound radiation of Contra-Rotating Open Rotors(CRORs)is an essential element of design methods of low-noise open rotor propulsion systems.In the present work,a previous frequency-domain model is extended to predict CROR noise.It builds explicitly the relationship between harmonic loadings and corresponding tonal noise,by which the influential parameters to noise generation can be clearly understood.The real distribu-tions of steady and unsteady blade loadings are calculated by the Nonlinear Harmonic(NLH)method.In the present hybrid approach,both the CFD and acoustic modules are solved in the fre-quency domain.To assess the accuracy of the developed method,the loading noise of a CROR is calculated and compared against results by using the time-domain FW-H module of NUMECA.The predicted sound directivities by the two methods are in good agreements.The present acoustic model in the frequency domain is proven to be accurate and have high efficiency in far-field noise prediction and data processing.Furthermore,the characteristics of the CROR interaction tonal noise are analyzed and discussed. | Wangjian SHU Congcong CHEN Lin DU Xiang HE Xiaofeng SUN | 2023 | Chinese Journal of Aeronautics2023，36，4： | 1 |
| 10 | Metabolic engineering tanshinone biosynthetic pathway in Salvia miltiorrhiza hairy root cultures显示文摘 | Guoyin Kai Hui Xu Congcong Zhou Pan Liao Jianbo Xiao Xiuqin Luo Lijia You Lin Zhang | 2011 | Metabolic Engineering2011，，3： | 1 |
| 11 | Soil pH drives the spatial distribution of bacterial communities along elevation on Changbai Mountain显示文摘 | Congcong Shen Jinbo Xiong Huayong Zhang Youzhi Feng Xiangui Lin Xinyu Li Wenju Liang Haiyan Chu | 2013 | Soil Biology and Biochemistry2013，，： | 1 |
| 12 | miR-124 Represses ROCK1 Expression to Promote Neurite Elongation Through Activation of the PI3K/Akt Signal Pathway显示文摘 | Xi Gu Siying Meng Shuhu Liu Chunhong Jia Yingying Fang Shuji Li Congcong Fu Qiancheng Song Lifang Lin Xuemin Wang | 2014 | Journal of Molecular Neuroscience2014，，1： | 1 |
| 13 | Application of immersed boundary method in turbomachines显示文摘Simulating unsteady turbulent flow in turbomachines is still challenging due to the complexity of blade geometry and relative motion between rotor and stator.This study presents an Immersed Boundary Method(IBM)for high-Reynolds turbomachinery internal flows,and shows the advantage of the automatic grid generation techniques and flexible moving boundary treatments.The wall functions are used in the present method to alleviate the wall resolution restriction of turbulence simulation.The Two-Dimensional(2-D)IBM solver,which was previously developed and tested for a low-speed compressor,is further validated for a well-documented Low-Pressure Turbine(LPT)cascade.Both the blade loading and the total pressure losses in the wake are well captured by the present 2-D solver.The complex Three-Dimensional(3-D)effects in turbomachines motivate the further development of an extended 3-D IBM solver by using a curvilinear-coordinate system that facilitates the hub and casing boundary treatment.The good performance of the 3-D solver is demonstrated through comparison with CFX solver solutions for the rotor configuration of Advanced Noise Control Fan(ANCF).Further effects of the grid resolution on capturing the blade wake are discussed.The results indicate that the present 3-D solver is capable of reproducing the evolution of the blade wake with suitable computational grid. | Congcong CHEN Yuwei WANG Zhuo WANG Lin DU Xiaofeng SUN | 2023 | Chinese Journal of Aeronautics2023，36，5： | 1 |
| 14 | Mechanical stretching boosts expansion and regeneration of intestinal organoids through fueling stem cell self-renewal显示文摘Intestinal organoids,derived from intestinal stem cell self-organization,recapitulate the tissue structures and behav-iors of the intestinal epithelium,which hold great potential for the study of developmental biology,disease modeling,and regenerative medicine.The intestinal epithelium is exposed to dynamic mechanical forces which exert profound effects on gut development.However,the conventional intestinal organoid culture system neglects the key role of mechanical microenvironments but relies solely on biological factors.Here,we show that adding cyclic stretch to intestinal organoid cultures remarkably up-regulates the signature gene expression and proliferation of intestinal stem cells.Furthermore,mechanical stretching stimulates the expansion of SOX9+progenitors by activating the Wnt/β-Catenin signaling.These data demonstrate that the incorporation of mechanical stretch boosts the stemness of intestinal stem cells,thus benefiting organoid growth.Our findings have provided a way to optimize an organoid generation system through understanding cross-talk between biological and mechanical factors,paving the way for the application of mechanical forces in organoid-based models. | Fanlu Meng Congcong Shen Li Yang Chao Ni Jianyong Huang Kaijun Lin Zanxia Cao Shicai Xu Wanling Cui Xiaoxin Wang Bailing Zhou Chunyang Xiong Jihua Wang Bing Zhao | 2022 | Cell Regeneration2022，11，1： | 0 |
| 15 | The proximity between hydroxyl and single atom determines the catalytic reactivity of Rh1/CeO_(2) single-atom catalysts显示文摘The local structure of the metal single-atom site is closely related to the catalytic activity of metal single-atom catalysts(SACs).However,constructing SACs with homogeneous metal active sites is a challenge due to the surface heterogeneity of the conventional support.Herein,we prepared two Rh1/CeO_(2)SACs(0.5Rh1/r-CeO_(2)and 0.5Rh1/c-CeO_(2),respectively)using two shaped CeO_(2)(rod and cube)exposing different facets,i.e.,CeO_(2)(111)and CeO_(2)(100).In CO oxidation reaction,the T100 of 0.5Rh1/r-CeO_(2)SACs is 120°C,while the T100 of 0.5Rh1/c-CeO_(2)SACs is as high as 200°C.Via in-situ CO diffuse reflectance infrared Fourier transform spectroscopy(CO-DRIFTS),we found that the proximity between OH group and Rh single atom on the plane surface plays an important role in the catalytic activity of Rh1/CeO_(2)SAC system in CO oxidation.The Rh single atom trapped at the CeO_(2)(111)crystal surface forms the Rh1(OH)adjacent species,which is not found on the CeO_(2)(100)crystal surface at room temperature.Furthermore,during CO oxidation,the OH group far from Rh single atom on the 0.5Rh1/c-CeO_(2)disappears and forms Rh1(OH)adjacent species when the temperature is above 150°C.The formation of Rh1(OH)adjacentCO intermediate in the reaction is pivotal for the excellent catalytic activity,which explains the difference in the catalytic activity of Rh single atoms on two different CeO_(2)planes.The formed Rh1(OH)adjacent-O-Ce structure exhibits good stability in the reducing atmosphere,maintaining the Rh atomic dispersion after CO oxidation even when pre-reduced at high temperature of 500°C.Density functional theory(DFT)calculations validate the unique activity and reaction path of the intermediate Rh1(OH)adjacentCO species formed.This work demonstrates that the proximity between metal single atom and hydroxyl can determine the formation of active intermediates to affect the catalytic performances in catalysis. | Danfeng Wu Shuyun Zhou Congcong Du Juan Li Jianyu Huang Hong-xia Shen Abhaya K.Datye Shan Jiang Jeffrey T.Miller Sen Lin Haifeng Xiong | 2024 | Nano Research2024，17，1： | 0 |
| 16 | Prohibitin Protein Expression During Spermatogenesis in the Large Yellow Croaker, Larimichthys crocea显示文摘Mitochondria are important for animals’fertility,and their morphologies and functions during spermatogenesis are un-der investigation.However,the molecular mechanism that regulates the mitochondrial dynamic during spermatogenesis is still un-known.In this study,the cytological features of spermatogenesis were investigated in Larimichthys crocea.In addition,the structure and function of prohibitin(PHB),which is associated with mitochondrial structure and dynamic,was also investigated.The full-length cDNA and protein(Lc-PHB)from the L.crocea phb gene(Lc-phb)contained 1625 base pairs and 271 amino acids,respec-tively.Lc-PHB had a conserved primary structure that resulted in a transmembrane,SPFH(the analogous region of proteins stomat-ins,prohibitins,flotillins and HflK/C),and coiled-coil domains.It was detected at high levels in the muscle,liver,and heart,and at intermediate levels in the testis,gill,and brain.Lc-phb mRNA expression was detected in spermatogenic cells by fluorescence in situ hybridization.An immunofluorescence assay revealed that PHB protein was localized in the mitochondria during spermatogenesis.Specifically,PHB expression was detected in the perinuclear cytoplasm of spermatogonia,spermatocytes,and spermatids in the early developmental stage,and mainly localized on one side of the nuclei in the cytoplasm of spermatids in a middle developmental stage,and finally on the sperm midpiece.Western blotting showed that PHB was located in the extracted mitochondria protein fraction but not in the cytoplasm protein fraction of testes.Conclusively,these results indicated that PHB was expressed in the mitochondria dur-ing spermatogenesis.In addition,the study explained the mitochondrial dynamic during fish spermatogenesis and proposed a possi-ble relationship among PHB,spermatogenesis,and male fertility. | LIN Chenwen GAO Xinming NI Jie ZHANG Shengshuo LIU Cheng LUO Shengyu DU Chen ZHENG Xuebin HOU Congcong TANG Daojun ZHANG Chundan ZHU Junquan | 2022 | Journal of Ocean University of China2022，21，5： | 0 |
| 17 | Experimental and numerical study on the shrinkage-deformation of carrot slices during hot air drying显示文摘In order to further understand the mechanism of material volume change in the drying process,numerical simulations(considering or neglecting shrinkage)of heat and mass transfer during convective drying of carrot slices under constant and controlled temperature and relative humidity were carried out.Simulated results were validated with experimental data.The results of the simulation show that the Quadratic model fitted well to the moisture ratio and the material temperature data trend with average relative errors of 5.9%and 8.1%,respectively.Additionally,the results of the simulation considering shrinkage show that the moisture and temperature distributions during drying are closer to the experimental data than the results of the simulation disregarding shrinkage.The material moisture content was significantly related to the shrinkage of dried tissue.Temperature and relative humidity significantly affected the volume shrinkage of carrot slices.The volume shrinkage increased with the rising of the constant temperature and the decline of relative humidity.This model can be used to provide more information on the dynamics of heat and mass transfer during drying and can also be adapted to other products and dryers devices. | Dalong Jiang Congcong Li Zifan Lin Yuntian Wu Hongjuan Pei Magdalena Zielinska Hongwei Xiao | 2023 | International Journal of Agricultural and Biological Engineering2023，16，1： | 0 |
| 18 | Ultrasonic Microwave Assisted Extraction of Polysaccharides from Sipunculus nudus显示文摘[Objectives] This study was conducted to optimize experimental conditions for extraction of polysaccharides from Sipunculus nudus.[Methods]With the Sipunculus nudus from Sanya as the experimental material,S.nudus polysaccharide was extracted by ultrasonic microwave assisted method,during which univariate factors including solid-liquid ratio,time,temperature,ultrasonic power,microwave power were investigated,to select optimal extracting conditions,which were also demonstrated and optimized by variance and response surface analysis.The optimized conditions were adopted to carry out a test,in which the absorbance of S.nudus polysaccharide was measured with an ultraviolet and visible spectrophotometer,followed by the calculation of the extracting amount of polysaccharide,and precision test and recovery test were also carried out to verify the experimental method.[Results]The standard solutions were determined at the maximum absorption wavelength of 486 nm,and the regression equation was A = 0.2677 C + 0.001 8,R^2= 0.999 8.Solid-liquid ratio,time,temperature,ultrasonic power and microwave power were investigated by univariate analysis and then optimized by response surface method as follows: solid-liquid ratio at 1:20( g/ml),time of 35 min,temperature at 50 ℃,ultrasonic power at 420 W and microwave power at 300 W,under which the measured extracting amount of S.nudus polysaccharide was1.37 mg/g.The RSD was 0.985% in precision experiment.In the repeatability test,the extracting amounts of polysaccharide were 1.41,1.43 and 1.38 mg/g for three parallel tests,respectively,with a RSD of 1.140%.The recovery test obtained following results: for group a( added with glucose standard) : the recovery of S.nudus polysaccharide was in the range of 100.3%-101.4%,RSD = 0.03%; and for group b( not added with glucose standard) : the recovery of S.nudus polysaccharide was in the range of 99.7%-100.3%,RSD = 0.02%.[Conclusions]The research method is stable and reliable.This study provides data basis and reference for follow-up study on S.nudus. | Wen CHEN Xiangjun WANG Yujie WANG Shunqi ZHANG Xu LIN Chenjia JIAO Congcong ZHANG | 2018 | Agricultural Biotechnology2018，7，6： | 0 |
| 19 | Microstructure characteristics and mechanical properties of Al/Mg joints manufactured by magnetic pulse welding显示文摘The effective connection of 1050 Al and AZ31 Mg was realized by magnetic pulse welding.The maximum tensile-shear force of the dissimilar Al/Mg metal lap joint reached 97%of that of the 1050 Al alloy base material by optimizing the process parameters.The microstructure of dissimilar Al/Mg welded joints was analysed by Scanning Electron Microscope(SEM),Energy Dispersive Spectrometer(EDS)and Electron Backscattered Diffraction(EBSD).The results show that the key to obtaining high shear strength of Al/Mg dissimilar metal joints is mainly due to the following two reasons.On the one hand,grain refinement and element interdiffusion occur at the interface.On the other hand,no intermetallic compounds are formed at the interface. | Congcong Zhu Shiwei Xu Wenli Gao Yifan Meng Sen Lin Lu Dai | 2023 | Journal of Magnesium and Alloys2023，11，7： | 0 |
| 20 | Sporolactobacillus GD201215-the Reason forSwelling of Fruit Jelly显示文摘A gram-positive facultatively anaerobic bacterium, named Sporolactobacillus GD201215, was isolated from swollen fruit jelly. Colonies were circular, bulgy, opaque, moist and white, with a 1-2 mm diameter. Its sequence showed 97.46% and96.91% homology with Sporolactobacillus vineae SL153 T and S. putidus QC81-06 T, respectively. Sporolactobacillus GD201215 uses glucose, fructose and sucrose to produce acid, and metabolizes sodium citrate to generate CO_2 which is responsible for swelling of fruit jelly. It grew anaerobically in GYP broth at 37 ℃, p H 3.5-7.0, with 0-2%(w/v) Na Cl, and could be killed by heating at 71 ℃ for above 5 min. | Congcong LIU Quanxue LAN Guowu YANG Qiongying YAN Xiuling YE Jianfei HUANG Lin LIN Jing CHEN | 2016 | Agricultural Science & Technology2016，17，12： | 0 |
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