维普中文期刊产品整合服务
80篇 您的检索式:作者名="Weiyu Li"
    题名 作者 年代 出处 被引量
1Mutation profile and its correlation with clinicopathology in Chinese hepatocellular carcinoma patients显示文摘Background:Hepatocellular carcinoma(HCC)is one of the most common causes of cancer worldwide.Although many studies have focused on oncogene characteristics,the genomic landscape of Chinese HCC patients has not been fully clarified.Methods:A total of 165 HCC patients,including 146 males and 19 females,were enrolled.The median age was 55 years(range,27-78 years).Corresponding clinical and pathological information was collected for further analysis.A total of 168 tumor tissues from these patients were selected for next-generation sequencing(NGS)-based 450 panel gene sequencing.Genomic alterations including single nucleotide variations(SNV),short and long insertions and deletions(InDels),copy number variations,and gene rearrangements were analyzed.Tumor mutational burden(TMB)was measured by an algorithm developed in-house.The top quartile of HCC was classified as TMB high.Results:A total of 1,004 genomic alterations were detected from 258 genes in 168 HCC tissues.TMB values were identified in 160 HCC specimens,with a median TMB of 5.4 Muts/Mb(range,0-28.4 Muts/Mb)and a 75%TMB of 7.7 Muts/Mb.The most commonly mutated genes were TP53,TERT,CTNNB1,AXIN1,RB1,TSC2,CCND1,ARID1A,and FGF19.SNV was the most common mutation type and C:G>T:A and guanine transformation were the most common SNVs.Compared to wild-type patients,the proportion of Edmondson grade III-IV and microvascular invasion was significantly higher in TP53 mutated patients(P<0.05).The proportion of tumors invading the hepatic capsule was significantly higher in TERT mutated patients(P<0.05).The proportion of Edmondson grade I-II,alpha fetoprotein(AFP)<25μmg/L,and those without a history of hepatitis B was significantly higher in CTNNB1 mutated patients(P<0.05).CTNNB1 mutations were associated with TMB high in HCC patients(P<0.05).Based on correlation analysis,the mutation of TP53 was independently correlated with microvascular invasion(P=0.002,OR=3.096)and Edmondson grade III-IV(P=0.008,OR=2.613).The mutation of TERT was independently correlated with tumor invasion of the liver capsule(P=0.001,OR=3.030),and the mutation of CTNNB1 was independently correlated with AFP(<25μmg/L)(P=0.009,OR=3.414).Conclusions:The most frequently mutated genes of HCC patients in China were TP53,TERT,and CTNNB1,which mainly lead to the occurrence and development of HCC by regulating the P53 pathway,Wnt pathway,and telomere repair pathway.There were more patients with microvascular invasion and Edmondson III-IV grade in TP53 mutated patients and more patients with hepatic capsule invasion in TERT mutated patients,while in CTNNB1 mutated patients,there were more patients with Edmondson I-II grade,AFP<25μmg/L,and a non-hepatitis B background.Also,the TMB values were significantly higher in CTNNB1 mutated patients than in wild type patients.Shuo Wang Huasheng Shi Tao Liu Manjiang Li Sanshun Zhou Xuan Qiu Zusen Wang Weiyu Hu Weidong Guo Xiaoqian Chen Honglin Guo Xiaoliang Shi Junping Shi Yunjin Zang Jingyu Cao Liqun Wu 2021Hepatobiliary Surgery and Nutrition2021,10,2:8
2Homozygous loss-of-function mutations in FSIP2 cause male infertility with asthenoteratospermia显示文摘Male infertility, as a major issue of human reproduction health, prevents successful natural conception. Asthenoteratospermia mainly presents one or multiple anomalies in head, neck and tail of spermatozoa, and impairs sperm function and motility (Coutton et al., 2015). Recurrent abnormalities of the fibrous sheath lead to multiple morphological abnormaliries of the sperm flagella (MMAF), which is a quite frequent type of asthenoteratospermia in male infertility (Chemes et al., 1987;Ben Khelifa et al, 2014).Wangjie Liu Huan Wu Li Wang Xiaoyu Yang Chunyu Liu Xiaojin He Weiyu Li Jiajia Wang Yujie Chen Hongyan Wang Yang Gao Shuyan Tang Shenmin Yang Li Jin Feng Zhang Yunxi Cao 2019Journal of Genetics and Genomics2019,46,1:7
3Cloning of Ln Gene Through Combined Approach of Map-based Cloning and Association Study in Soybean显示文摘Increasing yield is one of the most important goals in crop breeding.Soybean(Glycine max L.Merr.),one of the most economically important leguminous seed crops,provides the majority of plant proteins,and more than a quarter of the world's food and animal feed(Graham and Vance,2003). The yield of soybean is finally determined by the number of seeds per unit area,which affected by many characters,such as height,branching number,photosynthesis,seed size,seed number.The number of seeds per pod is taken for one of the critical components that related to yield(You et al.,1995),and it has long been considered in soybean production(Takahashi,Chao Fang Weiyu Li Guiquan Li Zheng Wang Zhengkui Zhou Yanming Ma Yanting Shen Congcong Li Yunshuai Wu Baoge Zhu Weicai Yang Zhixi Tian 2013Journal of Genetics and Genomics2013,40,2:7
4Unsaturated-sulfur-rich MoS2 nanosheets decorated on free-standing SWNT film: Synthesis, characterization and electrocatalytic application显示文摘此处,我们报导一条自底向上的 solvothermal 线路综合为氢进化反应的灵活、高度有效的瞬间 2@SWNT electrocatalyst (她的) 。描述表明包含 sulfurrich 地点的像分支的瞬间 2 nanosheets 在一致地在自立的围单人赛的碳 nanotube (SWNT ) 上驱散的 situ 电影,能暴露更不饱和的硫原子,与活跃地点允许优秀电的接触。展出的灵活催化剂优秀她有低过电位的表演(~ 在 10 妈 / 厘米 2) 和小 Tafel 斜坡(41 mV/dec ) 的 150 mV。为了推进,解释改进表演,本地电子结构被 X 光检查吸收调查近边的结构(XANES ) 分析,证明不饱和的硫原子并且在瞬间 2 和 SWNT 之间的强壮的电子联合的存在。这研究提供一条在原处合成的线路在催化剂微观结构,电子结构,和性质之中创造新多功能的灵活 hybridized 催化剂和有用卓见进关系。Daobin Liu Weiyu Xu Qin Liu Qun He Yasir A. Haleem Changda Wang Ting Xiang Chongwen Zou Wangsheng Chu Jun Zhong Zhiqiang Niu Li Song 2016Nano Research2016,9,7:7
5Effects of Fatty Acids on Low-Sulfur Diesel Lubricity:Experimental Investigation, DFT Calculation and MD Simulation显示文摘The continuous reduction in sulfur content of fuels would lead to diesel fuel with poor lubricity which could result in engine pump failure. In the present work, fatty acids were adopted as lubricity additives to low-sulfur diesel fuel. It was attempted to correlate the molecular structures of fatty acids, such as carbon chain length, degree of saturation and hydroxylation, to their lubricity enhancement, which was evaluated by the High-Frequency Reciprocating Rig (HFRR) method. The efficiency order was supported by the density functional theory (DFT) calculations and the molecular dynamics (MD) simulations. The lubricity enhancing properties of fatty acids are mainly determined by the cohesive energy of adsorbed films formed on iron surface. The greater the cohesive energy, the more efficiently the fatty acid would enhance the lubricity of low-sulfur diesel fuel.Luo Hui Fan Weiyu Li Yang Zhao Pinhui Nan Guozhi 2013China Petroleum Processing & Petrochemical Technology2013,15,2:6
6Spatio-temporal analysis and simulation on shallow rainfall-induced landslides in China using landslide susceptibility dynamics and rainfall I-D thresholds显示文摘An empirical simulation method to simulate the possible position of shallow rainfall-induced landslides in China has been developed.This study shows that such a simulation may be operated in real-time to highlight those areas that are highly prone to rainfall-induced landslides on the basis of the landslide susceptibility index and the rainfall intensity-duration(I-D) thresholds.First,the study on landslide susceptibility in China is introduced.The entire territory has been classified into five categories,among which high-susceptibility regions(Zone 4-'High' and 5-'Very high') account for 4.15%of the total extension of China.Second,rainfall is considered as an external triggering factor that may induce landslide initiation.Real-time satellite-based TMPA3B42 products may provide real rainfall spatial and temporal patterns,which may be used to derive rainfall duration time and intensity.By using a historical record of 60 significant past landslides,the rainfall I-D equation has been calibrated.The rainfall duration time that may trigger a landslide has resulted between 3 hours and 45 hours.The combination of these two aspects can be exploited to simulate the spatiotemporal distribution of rainfall-induced landslide hazards when rainfall events exceed the rainfall I-D thresholds,where the susceptibility category is 'high' or 'very high'.This study shows a useful tool to be part of a systematic landslide simulation methodology,potentially providing useful information for a theoretical basis and practical guide for landslide prediction and mitigation throughout China.LI WeiYue LIU Chun Marco SCAIONI SUN WeiWei CHEN Yu YAO DongJing CHEN Sheng HONG Yang ZHANG KaiHang CHENG GuoDong 2017Science China Earth Sciences2017,60,4:5
7Vulnerability to drought-induced cavitation in shoots of two typical shrubs in the southern Mu Us Sandy Land, China显示文摘Salix psammophila and Caragana korshinskii are two typical shrubs in the southern Mu Us Sandy Land of China which are threatened by increasing water deficits related to climate change and large-scale human activities(e.g. coal mining and oil exploitation). In this study, we assessed their vulnerability to xylem embolism and the related anatomical traits in two-year-old regenerated shoots of these two shrubs to understand how they cope with drought environment. We also evaluated the in situ hydraulic safety margins to hydraulic failure from measurements of annual predawn and midday leaf water potentials. The results showed that S. psammophila stems had a higher water transport capacity than C. korshinskii stems. The stem xylem water potentials at 12%, 50% and 88% loss of conductivity were –1.11, –1.63 and –2.15 MPa in S. psammophila, respectively, and –1.37, –2.64 and –3.91 MPa in C. korshinskii, respectively. This suggested that C. korshinskii was more resistant to cavitation than S. psammophila. Compared with S. psammophila, C. korshinskii had shorter maximum vessel length, lower vessel density, smaller conductive area and higher wood density, which may contribute to its more resistant xylem. The in situ hydraulic safety margins indicated that even during the driest periods, both shrubs lived well above the most critical embolism thresholds, and the hydraulic safety margin was wider in C. korshinskii than in S. psammophila, suggesting that the regenerated shoots of both shrubs could function normally and C. korshinskii had greater hydraulic protection. These results provide the basis for an in-depth understanding of the survival, growth and functional behavior of these two shrubs under harsh and dry desert environments.LI Yangyang CHEN Weiyue CHEN Jiacun SHI Hui 2016Journal of Arid Land2016,8,1:5
8Clinical efficacy of comprehensive therapy based on traditional Chinese medicine patterns on patients with pneumoconiosis: a pilot double-blind, randomized, and placebo-controlled study显示文摘Effective therapy options for pneumoconiosis are lacking.Traditional Chinese medicine(TCM)presents a favorable prospect in the treatment of pneumoconiosis.A pilot study on TCM syndrome differentiation can evaluate the clinical efficacy and safety of TCM and lay a foundation for further clinical research.A double-blind,randomized,and placebo-controlled trial was conducted for 24 weeks,in which 96 patients with pneumoconiosis were randomly divided into the control and treatment groups.Symptomatic treatment was conducted for the two groups.The treatment group was treated with TCM syndrome differentiation,and the control group was treated with placebo.The primary outcomes were the six-minute walking distance(6MWD)and the St.George Respiratory Questionnaire(SGRQ)score.The secondary outcomes were the modified British Medical Research Council Dyspnea Scale(mMRC),Chronic Obstructive Pulmonary Disease Assessment Test(CAT),Hospital Anxiety and Depression Scale(HADS),and pulmonary function.Only 83 patients from the 96 patients with pneumoconiosis finished the study.For the primary outcome,compared with the control groups,the treatment group showed a significantly increased 6MWD(407.90 m vs.499.51 m;95%confidence interval(CI)47.25 to 135.97;P<0.001)and improved SGRQ total score(44.48 vs.25.67;95%CI 27.87 to 9.74;P<0.001).The treatment group also significantly improved compared with the control group on mMRC score(1.4 vs.0.74;95%CI 1.08 to 0.23;P=0.003),CAT score(18.40 vs.14.65;95%CI 7.07 to 0.43;P=0.027),and the total symptom score(7.90 vs.5.14;95%CI 4.40 to 1.12;P<0.001).No serious adverse events occurred.This study showed that TCM syndrome differentiation and treatment had a favorable impact on the exercise endurance and quality of life of patients with pneumoconiosis.Jiansheng Li Hulei Zhao Yang Xie Jieya Li Qingwei Li Xuexin Chen Weiyu Zhang 2022Frontiers of Medicine2022,16,5:5
9Experimental and Molecular Dynamics Simulations for Investigating the Effect of FattyAcid and Its Derivatives on Low Sulfur Diesel Lubricity显示文摘In this work,fatty acid and its derivatives were adopted as lubricity additives for low sulfur diesel.Tribological evaluation obtained from the High-Frequency Reciprocating Rig(HFRR)apparatus showed that the lubricating performance of the additives increased in the following order:stearic acid>glycol monopalmitate>stearyl alcohol>ethyl palmitate>cetyl ethyl ether.The adsorption behavior of the additives on Fe(110)surface and Fe2O3(001)surface was investigated by molecular dynamics(MD)simulations to verify their lubricity performance.The results suggested that adsorption energies of the additives on Fe(110)surface are determined by the van der Waals forces,while adsorptions on Fe2O3(001)surface are significantly attributed to the electrostatic attractive forces.Higher values of adsorption energy of the additives on Fe2O3(001)surface indicate that the additive has more efficient lubricity enhancing properties.Luo Hui Fan Weiyu Li Yang Zhao Pinhui Nan Guozhi 2013China Petroleum Processing & Petrochemical Technology2013,15,3:4
10Downregulation of KCTD12 contributes to melanoma stemness by modulating CD271显示文摘Objective: Cancer metastasis remains the primary cause of cancer-related death worldwide.In a previous study, we found that levels of BTB/POZ domain-containing protein KCTD12 are lower in metastatic melanoma cells than in parental melanoma cells.The purpose of this study was to identify the roles of KCTD12 in cancer metastasis.Methods: The Cancer Genome Atlas(TCGA) datasets were used to evaluate the relationship between KCTD12 and skin cutaneous melanoma(SKCM) prognosis.The effects of endogenous KCTD12 on biological behaviors were examined using the MTT assay.The impacts of KCTD12 on melanoma stemness were explored using spheroid formation assay.KCTD12 knockout A375 cells were generated to confirm the inhibitory effect of KCTD12 on CD271, and a mouse metastatic model was used to determine the impact of KCTD12 on melanoma metastasis in vivo.Results: KCTD12 levels were lower in lung metastatic cells than in paired parental melanoma cells, and low KCTD12 expression indicated a poor prognosis in SKCM.Cancer metastasis-related capacities were higher in lung metastatic cells than in parental melanoma cells.Moreover, KCTD12 knockdown enhanced tumor growth and metastasis both in vitro and in vivo.Mechanistically, the interaction between KCTD12 and CD271 might be responsible for the stemness transformation after KCTD12 knockdown.Conclusions: This study identifies for the first time the role of the interaction between KCTD12 and CD271 in inducing melanoma cell stemness transformation.Moreover, KCTD12 repression enhances melanoma cell growth, adhesion, migration and invasion.Weiyu Shen Yumei Li Bifei Li Liping Zheng Xiaodong Xie Jingqing Le Yusheng Lu Tao Li Fan Chen Lee Jia 2019Cancer Biology & Medicine2019,16,3:4
11Tuning Atomically Dispersed Fe Sites in Metal–Organic Frameworks Boosts Peroxidase‑Like Activity for Sensitive Biosensing显示文摘Although nanozymes have been widely developed,accurate design of highly active sites at the atomic level to mimic the electronic and geometrical structure of enzymes and the exploration of underlying mechanisms still face significant challenges.Herein,two functional groups with opposite electron modulation abilities(nitro and amino)were introduced into the metal–organic frameworks(MIL-101(Fe))to tune the atomically dispersed metal sites and thus regulate the enzymelike activity.Notably,the functionalization of nitro can enhance the peroxidase(POD)-like activity of MIL-101(Fe),while the amino is poles apart.Theoretical calculations demonstrate that the introduction of nitro can not only regulate the geometry of adsorbed intermediates but also improve the electronic structure of metal active sites.Benefiting from both geometric and electronic effects,the nitro-functionalized MIL-101(Fe)with a low reaction energy barrier for the HO*formation exhibits a superior POD-like activity.As a concept of the application,a nitro-functionalized MIL-101(Fe)-based biosensor was elaborately applied for the sensitive detection of acetylcholinesterase activity in the range of 0.2–50 mU mL−1 with a limit of detection of 0.14 mU mL−1.Moreover,the detection of organophosphorus pesticides was also achieved.This work not only opens up new prospects for the rational design of highly active nanozymes at the atomic scale but also enhances the performance of nanozyme-based biosensors.Weiqing Xu Yikun Kang Lei Jiao Yu Wu Hongye Yan Jinli Li Wenling Gu Weiyu Song Chengzhou Zhu 2020Nano-Micro Letters2020,12,12:4
12Efficacy of inverso isomer of CendR peptide on tumor tissue penetration显示文摘The dense extracellular matrix and high interstitial fluid pressure of tumor tissues prevent the ability of anti-tumor agents to penetrate deep into the tumor parenchyma for treatment effects. C-end rule(CendR) peptides can enhance the permeability of tumor blood vessels and tumor tissues via binding to neuropilin-1(NRP-1), thus aiding in drug delivery. In this study, we selected one of the CendR peptides(sequence RGERPPR) as the parent L-peptide and substituted D-amino acids for the L-amino acids to synthesize its inverso peptide D(RGERPPR). We investigated the NRP-1 binding activity and tumorpenetrating ability of D(RGERPPR). We found that the binding affinity of D(RGERPPR) with NRP-1 and the cellular uptake was significantly higher than that of RGERPPR. Evans Blue tests revealed that D(RGERPPR) exhibited improved tumor-penetrating ability in C6, U87 and A549 tumor-bearing nude mice. Using nude mice bearing A549 xenograft tumors as a model, we found that the rate of tumor growth in the group co-administered with D(RGERPPR) and gemcitabine(Gem) was significantly lower than the gemcitabine-treated group with a tumor suppression rate(TSR%) of 55.4%. Together, our results demonstrate that D(RGERPPR) is a potential tumor-penetrating peptide.Ruifeng Wang Qing Shen Xue Li Cao Xie Weiyue Lu Songli Wang Jing Wang Dongli Wang Min Liu 2018Acta Pharmaceutica Sinica B2018,8,5:3
13SPDEF suppresses head and neck squamous cell carcinoma progression by transcriptionally activating NR4A1显示文摘SAM pointed domain containing E26 transformation-specific transcription factor(SPDEF)plays dual roles in the initiation and development of human malignancies.However,the biological role of SPDEF in head and neck squamous cell carcinoma(HNSCC)remains unclear.In this study,the expression level of SPDEF and its correlation with the clinical parameters of patients with HNSCC were determined using TCGA-HNSC,GSE65858,and our own clinical cohorts.CCK8,colony formation,cell cycle analysis,and a xenograft tumor growth model were used to determine the molecular functions of SPDEF in HNSCC.ChIP-qPCR,dual luciferase reporter assay,and rescue experiments were conducted to explore the potential molecular mechanism of SPDEF in HNSCC.Compared with normal epithelial tissues,SPDEF was significantly downregulated in HNSCC tissues.Patients with HNSCC with low SPDEF mRNA levels exhibited poor clinical outcomes.Restoring SPDEF inhibited HNSCC cell viability and colony formation and induced G0/G1 cell cycle arrest,while silencing SPDEF promoted cell proliferation in vitro.The xenograft tumor growth model showed that tumors with SPDEF overexpression had slower growth rates,smaller volumes,and lower weights.SPDEF could directly bind to the promoter region of NR4A1 and promoted its transcription,inducing the suppression of AKT,MAPK,and NF-κB signaling pathways.Moreover,silencing NR4A1 blocked the suppressive effect of SPDEF in HNSCC cells.Here,we demonstrate that SPDEF acts as a tumor suppressor by transcriptionally activating NR4A1 in HNSCC.Our findings provide novel insights into the molecular mechanism of SPDEF in tumorigenesis and a novel potential therapeutic target for HNSCC.Yanting Wang Xianyue Ren Weiyu Li Ruoyan Cao Suyang Liu Laibo Jiang Bin Cheng Juan Xia 2021International Journal of Oral Science2021,13,4:3
14LHCGR and ALMS1 defects likely cooperate in the development of polycystic ovary syndrome indicated by double-mutant mice显示文摘Polycystic ovary syndrome(PCOS)is a heterogeneous disorder with evidence of polygenetic components,and obesity may be a risk factor for hyperandrogen ism.Previous studies have shown that LHCGR is en riched in the ovary and LHCGR deficiency causes infertility without typical PCOS phenotypes.ALMS1 is implicated in obesity and hyperandrogenism,the common phenotypes among PCOS patients.Through whole-exome sequencing of 22 PCOS families and targeted candidate gene sequencing of additional 65 sporadic PCOS patients,we identified potential causative mutations in LHCGR and ALMS1 in a sibling-pair PCOS family and three sporadic PCOS patients.The expression of LHCGRL638 P in granulosa-like tumor cell line(KGN)cells promoted cyclic adenosine monophosphate production and granulosa cell proliferation,indicating that LHCGRL638 P is an activating mutation.Lhcgr~(L642 P/L642 P)mice showed an irregular estrous cycle,reduced follicles with dynamic folliculogenesis,and increased testosterone(T),estradiol(E2),and dehydroepiandrosterone.Lhcgr~(+/L642 P)AIms1~(+/PB)mice displayed increased T and E2 but decreased late secondary and preovulatory follicles.We showed that activating mutation of LHCGR likely plays important roles in the pathophysiology of PCOS involving abnormal reproductive physiology,whereas ALMS1 deficiency may promote anovulatory infertility via elevated androgens,suggesting that the disturbed LHCGR and ALMS1 cooperatively induce PCOS phenotypes,characterized as anovulation and hyperandrogenemia frequently observed in PCOS patients with obesity.Li Yu Lina Wang Wufan Tao Wenxiang Zhang Shuanghao Yang Jian Wang Jia Fei Rui Peng Yiming Wu Xiumei Zhen Hong Shao Weiyue Gu Rong Li Bai-Lin Wu Hongyan Wang 2021Journal of Genetics and Genomics2021,48,5:3
15Key Factors for Efficient Consumption of Renewable Energy in a Provincial Power Grid in Southern China显示文摘The development of renewable energy sources(RES)is important to promote the energy transition and address climate change.Unlike the centralized RES power plants in the north of China,the distributed RES power plants in the south of China for achieving local consumption have become an effective alternative.However,the differences between RES and hydropower consumption have become obvious in some areas.This paper investigates the key factors affecting the abandonment of RES in the south of China.To alleviate the problem of RES consumption,various measures are discussed from the aspects of evaluating the consumption capacity of power grids at different voltage levels,optimizing demand-side management,flexibly for reforming the peak-shaving power sources of thermal power plants and strengthening inter-provincial transactions.The production simulation is used to validate the analysis and discussion.Ming Wen Yong Li Xintao Xie Yijia Cao Yaowu Wu Weiyu Wang Li He Yu Cao Binkun Xu Limiao Huang 2020CSEE Journal of Power and Energy Systems2020,6,3:3
16Comparative study on the deviation characteristics of post-earthquake intensity evaluation based on two intensity attenuation relationship models显示文摘We collect the isoseismal data of 488 earthquakes in western China and 182 earthquakes in eastern China after 1900.The least square method is used to establish two models of the seismic intensity attenuation relationship partitions in China,based on the major and minor axis ellipse models,and the area and the major axis radius,respectively.The two models are applied to the calculation of the intensity circle of the earthquake events with a magnitude M_(S)≥5.0 from 2008 to 2019,and the actual intensity is compared with the model intensity value as an indicator to verify the consistency between the actual intensity and the value from the empirical statistical model.Three real earthquake results are selected to calculate the major and minor axis and area of the ellipse using the two intensity attenuation relationship models.After comparison,we summarize the deviation characteristics of the intensity value,and put forward corresponding improvement suggestions.Jing Ren Zhiqiang Li Shuaitang Huang Zhuantiao Tan Yahui Chen Qi Yao Weiyu Ma 2021Earthquake Research Advances2021,1,2:2
17Ultra-small hollow ternary alloy nanoparticles for efficient hydrogen evolution reaction显示文摘Hollow nanoparticles with large specific surface area and high atom utilization are promising catalysts for the hydrogen evolution reaction(HER). We describe herein the design and synthesis of a series of ultra-small hollow ternary alloy nanostructures using a simple one-pot strategy. The same technique was demonstrated for hollow PtNiCu nanoparticles, hollow PtCoCu nanoparticles and hollow CuNiCo nanoparticles. During synthesis, the displacement reaction and oxidative etching played important roles in the formation of hollow structures. Moreover, our hollow PtNiCu and PtCoCu nanoparticles were single crystalline, with an average diameter of 5 nm. Impressively, ultra-small hollow PtNiCu nanoparticles,containing only 10% Pt, exhibited greater electrocatalytic HER activity and stability than a commercial Pt/C catalyst. The overpotential of hollow Pt Ni Cu nanoparticles at 10 mA cm^(-2) was 28 mV versus reversible hydrogen electrode(RHE). The mass activity was 4.54 A mg Pt^(-1) at-70 mV versus RHE, which is 5.62-fold greater than that of a commercial Pt/C system(0.81 A mg Pt^(-1)). Through analyses of bonding and antibonding orbital filling, density functional theory calculations demonstrated that the bonding strength of different metals to the hydrogen intermediate(H*) was in the order of Pt > Co > Ni > Cu. The excellent HER performance of our hollow PtNiCu nanoparticles derives from moderately synergistic interactions between the three metals and H*. This work demonstrates a new strategy for the design of low-cost and high-activity HER catalysts.Zhenxing Li Chengcheng Yu Yikun Kang Xin Zhang Yangyang Wen Zhao-Kui Wang Chang Ma Cong Wang Kaiwen Wang Xianlin Qu Miao He Ya-Wen Zhang Weiyu Song 2021National Science Review2021,8,7:2
18The effects of two free-floating plants (Eichhornia crassipes and Pistia stratiotes) on the burrow morphology and water quality characteristics of pond loach (Misgurnus anguillicaudatus) habitat显示文摘Loach exhibit conspicuous drilling behaviors in the mud of shallow waters,yet their burrow morphology and the factors affecting this behavior have received little attention.We characterized the burrow morphology and water quality of the pond loach Misgurnus anguillicaudatus in three scenarios:in tanks without plants,tanks with the free-floating plant water hyacinth Eichhornia crassipes,and tanks with water lettuce Pistia stratiotes.Water hyacinth effectively removed water TN,COD,NO3-N and NH4-N,and water lettuce removed water TP and NH4-N.Water hyacinth and water lettuce markedly reduced water turbidity and DO,increased TOC and EC.Water hyacinth purified water more effectively than water lettuce,providing a suitable habitat for loach feeding,living and burrowing.The burrow structures were V-shaped,Y-shaped,inverted L-shaped,or complicated dendritic networks composed of multiple V shapes.The hyacinth treatment was characterized by the greatest burrow volume,length,depth,and structural complexity,but the opening size was reduced by dense root mat coverage.Burrows in the water lettuce treatment were characterized by intermediate volume,length,branches and sinuosity,but they had the largest opening and pit size.The control treatment had a flat bottom with the smallest,shortest burrows.This study indicates that free-floating plants improve habitat suitability and change burrow morphology and may be used to improve loach breeding methods。Jinqing Wang Guihua Fu Weiyue Li Ying Shi Jicai Pang Qiang Wang Weiguang Lü Change Liu Jiansheng Liu 2018Aquaculture and Fisheries2018,3,1:2
19Research progress of rare earth separation methods and technologies显示文摘Strategical elements,such as rare earth elements,play a crucial role in the industry,especially in producing high-tech materials.Major global industries have developed a strong dependence on rare earth materials.Every year,there are innovations in industries such as modern technology,green energy,or communications technology,which need more strategic metals to improve investment profitability.This article reviews advances in rare earth separation methods and techniques to guide and recommend the best extractants,depending on leaching conditions and the final target product.Each method for separating and extracting agents is individually revised in terms of the mechanism and interaction of providing rare earth elements.This paper also evaluates past and current trends of these methods and technical extractants and identifies their strengths and weaknesses.Mory Traore Aijun Gong Yiwen Wang Lina Qiu Yuzhen Bai Weiyu Zhao Yang Liu Yi Chen Ying Liu Huilin Wu Shuli Li Yueyi You 2023Journal of Rare Earths2023,41,2:2
20KLF7 promotes preadipocyte proliferation via activation of the Akt signaling pathway by Cis-regulating CDKN3显示文摘Krüppel-like transcription factor 7(KLF7)promotes preadipocyte proliferation;however,its target gene in this process has not yet been identified.Using KLF7 ChIP-seq analysis,we previously showed that a KLF7-binding peak is present upstream of the cyclin-dependent kinase inhibitor 3 gene(CDKN3)in chicken preadipocytes.In the present study,we identify CDKN3 as a target gene of KLF7 that mediates the effects of KLF7 on preadipocyte proliferation.Furthermore,5′-truncating mutation analysis shows that the minimal promoter is located between nt–160 and nt–7(relative to the translation initiation codon ATG)of CDKN3.KLF7 overexpression increases CDKN3 promoter activity in the DF-1 and immortalized chicken preadipocyte(ICP1)cell lines.Deletion of the putative binding site of KLF7 abolishes the promotive effect of KLF7 overexpression on CDKN3 promoter activity.Moreover,CDKN3 knockdown and overexpression assays reveal that CDKN3 enhances ICP1 cell proliferation.Flow cytometry analysis shows that CDKN3 accelerates the G1/S transition.Furthermore,we find that KLF7 promotes ICP1 cell proliferation via Akt phosphorylation by regulating CDKN3.Taken together,our results suggest that KLF7 promotes preadipocyte proliferation by activating the Akt signaling pathway by cis-regulating CDKN3,thus driving the G1/S transition.Ziqiu Jia Zhao Jin Shuli Shao Hu Xu Wen Li Mahmood Khan Weiyu Wang Weiwei Zhang Yingning Sun 2022Acta Biochimica et Biophysica Sinica2022,54,10:2
返回顶部 每页显示:
共4页 首页 上一页 第1页 下一页 末页 /4 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费