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32篇 您的检索式:作者名="Zhao Chenhui"
    题名 作者 年代 出处 被引量
1Successful generation of cloned mice using nuclear transfer from induced pluripotent stem cells显示文摘Shuya Zhou Chenhui Ding Xiaoyang Zhao Eryao Wang Xiangpeng Dai Lei Liu Wei Li Zichuan Liu Haifeng Wan Chunjing Feng Tang Hai Liu Wang Qi Zhou 2010Cell Research2010,20,7:10
2The Characterization, Authentication, and Gene Expression Pattern of the MdCER Family in Malus domestica显示文摘Plant cuticular wax is an important determinant factor of fruit quality. Cuticular wax can protect the fruit from UV radiation, drought, and disease and increase the storage period of fruit. In many species, CER gene is associated with wax and can affect plant response to stress, but no characterization of CER gene and its family has been reported in apples. In this study, we identified 10 MdCER genes in Malus domestica based on the sequences of 10 CER genes in Arabidopsis thaliana. Three-dimensional structures were then defined, and root-mean-square deviation(RMSD)scoring matrixes were used to evaluate the matches. These 10 genes were divided into three classes using phylogenetic methods; namely,class I, II, and III. The predicted MdCER genes were distributed across 7 out of 17 chromosomes with different densities. Furthermore, the gene structures and motif compositions of the MdCER genes were analyzed. The quantitative real-time PCR results indicated that MdCER family genes were mainly expressed in the leaves and stems and rarely in the roots. Most of the MdCER members responded to salicylic acid and polyethylene glycol treatment, indicating that the MdCER family is associated with disease resistance(biotic) and abiotic stress.Chenhui Qi Han Jiang Xianyan Zhao Ke Mao Haitao Liu Yuanyuan Li Yujin Hao 2019Horticultural Plant Journal2019,5,1:7
3Flower-like NiCo_(2)S_(4)nanosheets with high electrochemical performance for sodium-ion batteries显示文摘A three-dimensional flower-like NiCo_(2)S_(4) formed by two-dimensional nanosheets is synthesized by a facile hydrothermal method and utilized as the anode for sodium-ion batteries.Studies have shown that materials can achieve the best performance under the ether-based electrolyte system with voltage ranging from 0.3 to 3 V,which could effectively avoid the dissolution of polysulfides and over-discharge of the material.Here,sodium storage mechanism and charge compensation behaviors of this ternary metal sulfide are comprehensively investigated by ex situ X-ray diffraction.Moreover,ex situ Raman spectra,ex situ X-ray photoelectron spectroscopy and transmission electron microscopy measurements are used to related tests for the first time.Additionally,quantitative kinetic analysis unravels that sodium storage partially depends on the pseudocapacitance mechanism,resulting in good specific capacity and excellent rate performance.The initial discharge capacity is as high as 748 mAh·g^(−1)at a current density of 0.1 A·g^(−1)with the initial coulomb efficiency of 94%,and the capacity can still maintain at 580 mAh·g^(−1)with the Coulomb efficiency close to 100%after following 50 cycles.Moreover,by the long cycle test at a high current density of 2 A·g^(−1),the capacity can still reach at 376 mAh·g^(−1)after over 500 cycles.Yongqiang Miao Xiaosen Zhao Xin Wang Chenhui Ma Lu Cheng Gang Chen Huijuan Yue Lei Wang Dong Zhang 2020Nano Research2020,13,11:5
4A β-glucosidase-producing M-2 strain: Isolation from cow dung and fermentation parameter optimization for flaxseed cake显示文摘Flaxseed cake contains cyanogenic glucosides, which can be metabolized into hydrocyanic acid in an animal's body, leading to asphyxia poisoning in cells. Beta-glucosidase is highly efficient in degrading cyanogenic glucosides. The Cattle may have b-glucosidase-producing strains in the intestinal tract after eating small amounts of flaxseed cake for a long time. This study aimed to isolate of a strain from cow dung that produces b-glucosidase with high activity and can significantly reduce the amount of cyanogenic glucosides. We used cow dung as the microflora source and an esculin agar as the selective medium. After screening with 0.05% esculin and 0.01% ferric citrate, we isolated 5 strains producing high amounts of b-glucosidase. In vitro flaxseed cake fermentation was fermented by these 5 strains, in which the strain M-2 exerted the best effect(P < 0.05). The strain M-2 was identified as Lichtheimia ramosa and used as the fermentation strain to optimize the fermentation parameters by a single factor analysis and orthogonal experimental design. The optimum condition was as follows: inoculum size3%, water content 60%, time 144 h, and temperature 32℃. Under this condition, the removal rate of cyanogenic glucosides reached 89%, and crude protein increment reached 44%. These results provided a theoretical basis for the removal of cyanogenic glucosides in flaxseed and the comprehensive utilization of flaxseed cake.Chenhui Li Junshu Wei Yaping Jing Baoxia Teng Pingrong Yang Xinjun Chen Haiying Huang Tang Zhao Tuanjie Che Chunjiang Zhang 2019Animal Nutrition2019,,1:5
5IL-17-triggered downregulation of miR-497 results in high HIF-1α expression and consequent IL-1β and IL-6 production by astrocytes in EAE mice显示文摘Interleukin 17(IL-17)is increasingly recognized as a key factor that contributes to the pathogenesis of multiple sclerosis(MS)and its experimental mouse autoimmune encephalomyelitis(EAE)model.However,the roles and regulatory mechanisms of IL-17-induced pro-inflammatory cytokine production in EAE mice remain largely unclear.In this study,the expression of IL-17,hypoxia inducible factor-1α(HIF-1α),IL-1β,IL-6 and microRNA-497(miR-497),as well as their intrinsic associations,was investigated using EAE model mice and cultured astrocytes exposed to IL-17 in vitro.We observed markedly increased production of IL-17,HIF-1α,IL-1βand IL-6 in the brain tissues of EAE mice,while the expression and secretion of HIF-1α,IL-1βand IL-6 were also significantly increased when cultured primary astrocytes from mice were stimulated with IL-17.Meanwhile,the expression of miR-497 was downregulated both in vivo and in vitro.Subsequent in vitro experiments revealed that IL-17 induced the production of IL-1βand IL-6 in astrocytes through the upregulation of HIF-1αas a transcriptional factor,indicating that IL-17-mediated downregulation of miR-497 enhanced HIF-1αexpression.Furthermore,astrocytespecific knockdown of IL-17RA and HIF-1αor astrocyte-specific overexpression of miR-497 by infection with different lentiviral vectors containing an astrocyte-specific promotor markedly decreased IL-1βand IL-6 production in brain tissues and alleviated the pathological changes and score of EAE mice.Collectively,these findings indicate that decreased miR-497 expression is responsible for IL-17-triggered high HIF-1αexpression and consequent IL-1βand IL-6 production by astrocytes in EAE mice.Kai Shan Rongrong Pang Chenhui Zhao Xiaomei Liu Wenxing Gao Jing Zhang Dan Zhao Yingwei Wang Wen Qiu 2017Cellular & Molecular Immunology2017,14,11:5
6Association of three single nucleotide polymorphisms of ESR1 with breast cancer susceptibility:a meta-analysis显示文摘Expression of estrogen receptors is correlated with breast cancer risk,but inconsistent results have been reported.To clarify potential estrogen receptor(ESR)-related breast cancer risk,we analyzed genetic variants of ESR1 in association with breast cancer susceptibility.We performed a meta-analysis to investigate the association between rs2234693,rs1801132,and rs2046210(single nucleotide polymorphisms of ESR1),and breast cancer risk.Our analysis included 44 case-control studies.For rs2234693,the CC genotype had a higher risk of breast cancer compared to the TT or CT genotype.For rs2046210,the AA,GA,or GA + GG genotype had a much higher risk compared to the GG genotype.No significant association was found for the rs 1801132 polymorphism with breast cancer risk.This meta-analysis demonstrates association between the rs2234693 and rs2046210 polymorphisms of ESR1 and breast cancer risk.The correlation strength between rs2234693 and breast cancer susceptibility differs in subgroup assessment by ethnicity.Xu Hu Linfei Jiang Chenhui Tang Yuehong Ju Li Jiu Yongyue Wei Li Guo Yang Zhao 2017The Journal of Biomedical Research2017,31,3:4
7Sn02 nanoparticles anchored on graphene oxide as advanced anode materials for high-performance lithium-ion batteries显示文摘Lithium-ion batteries (LIBs) with high energy density have attracted great attention for their wide applications in electric vehicles, and the exploration of the nextgeneration anode materials with high theoretical capacity is highly desired. In this work, Sn02 nanoparticles with the particle size of 200 nm uniformly anchored on the surface of graphene oxide (GO) was prepared by combination of the ultrasonic method and the following calcination process. The Sn02/GO composite with the weight ratio of Sn02 to GO at 4:1 exhibits excellent electrochemical performance, which originates from the synergistic effects between GO and Sn02 nanoparticles. A high discharge capacity of 492 mA·h·g^-1 can be obtained after 100 cycles at 0.2C, and after cycling at higher current densities of 1C and 2C, a discharge capacity of 641 mA·h·g^-1 can be restored when the current density goes back to 0.1C. The superior electrochemical performance and simple synthesis process make it a very promising candidate as anode materials for LIBs.Ruiping LIU Ning ZHANG Xinyu WANG Chenhui YANG Hui CHENG Hanqing ZHAO 2019Frontiers of Materials Science2019,13,2:4
8Correlation between the mechanical properties and the<110>texture in a hot-rolled nearβtitanium alloy显示文摘1.Introduction Nearβtitanium alloys have been considered as a potential material to fabricate high-strength fasteners in aerospace field owing to their high specific strength,good crack and fatigue resistance[1,2].It is well known that the processing technology determines the microstructure,and the microstructure eventually correlates with the performance of alloys.Ruifeng Dong Xiaoyang Zhang Chenhui Li Yuhong Zhao Jinzhong Tian Li Wu Hua Hou 2022Journal of Materials Science & Technology2022,,2:4
9Glucose and MMP-9 dual-responsive hydrogel with temperature sensitive self-adaptive shape and controlled drug release accelerates diabetic wound healing显示文摘Chronic diabetic wounds are an important healthcare challenge. High concentration glucose, high level of matrix metalloproteinase-9 (MMP-9), and long-term inflammation constitute the special wound environment of diabetic wounds. Tissue necrosis aggravates the formation of irregular wounds. All the above factors hinder the healing of chronic diabetic wounds. To solve these issues, a glucose and MMP-9 dual-response temperature-sensitive shape self-adaptive hydrogel (CBP/GMs@Cel&INS) was designed and constructed with polyvinyl alcohol (PVA) and chitosan grafted with phenylboric acid (CS-BA) by encapsulating insulin (INS) and gelatin microspheres con-taining celecoxib (GMs@Cel). Temperature-sensitive self-adaptive CBP/GMs@Cel&INS provides a new way to balance the fluid-like mobility (self-adapt to deep wounds quickly, approximately 37 ◦C) and solid-like elasticity (protect wounds against external forces, approximately 25 ◦C) of self-adaptive hydrogels, while simultaneously releasing insulin and celecoxib on-demand in the environment of high-level glucose and MMP-9. Moreover, CBP/ GMs@Cel&INS exhibits remodeling and self-healing properties, enhanced adhesion strength (39.65 ± 6.58 kPa), down-regulates MMP-9, and promotes cell proliferation, migration, and glucose consumption. In diabetic full-thickness skin defect models, CBP/GMs@Cel&INS significantly alleviates inflammation and regulates the local high-level glucose and MMP-9 in the wounds, and promotes wound healing effectively through the synergistic effect of temperature-sensitive shape-adaptive character and the dual-responsive system.Wanyi Zhou Zhiguang Duan Jing Zhao Rongzhan Fu Chenhui Zhu Daidi Fan 2022Bioactive Materials2022,7,11:4
10Targeting the CD146/Galectin-9 axis protects the integrity of the blood-brain barrier in experimental cerebral malaria显示文摘Cerebral malaria(CM)is a life-threatening diffuse encephalopathy caused by Plasmodium falciparum,in which the destruction of the blood–brain barrier(BBB)is the main cause of death.However,increasing evidence has shown that antimalarial drugs,the current treatment for CM,do little to protect against CM-induced BBB damage.Therefore,a means to alleviate BBB dysfunction would be a promising adjuvant therapy for CM.The adhesion molecule CD146 has been reported to be expressed in both endothelial cells and proinflammatory immune cells and mediates neuroinflammation.Here,we demonstrate that CD146 expressed on BBB endothelial cells but not immune cells is a novel therapeutic target in a mouse model of experimental cerebral malaria(eCM).Endothelial CD146 is upregulated during eCM development and facilitates the sequestration of infected red blood cells(RBCs)and/or proinflammatory lymphocytes in CNS blood vessels,thereby promoting the disruption of BBB integrity.Mechanistic studies showed that the interaction of CD146 and Galectin-9 contributes to the aggregation of infected RBCs and lymphocytes.Deletion of endothelial CD146 or treatment with the anti-CD146 antibody AA98 prevents severe signs of eCM,such as limb paralysis,brain vascular leakage,and death.In addition,AA98 combined with the antiparasitic drug artemether improved the cognition and memory of mice with eCM.Taken together,our findings suggest that endothelial CD146 is a novel and promising target in combination with antiparasitic drugs for future CM therapies.Hongxia Duan Shuai Zhao Jianquan Xiang Chenhui Ju Xuehui Chen Irene Gramaglia Xiyun Yan 2021Cellular & Molecular Immunology2021,18,10:2
11Flexible bioelectronics for physiological signals sensing and disease treatment显示文摘Flexible bioelectronics,including wearable and implantable electronics,have revolutionized the way of human-machine interaction due to the fact that they can provide natural and seamless interactions with humans and keep stable and durable at strained states.As sensor elements or biomimetic actuators,flexible bioelectronics can dynamically sense and monitor physiological signals,reveal real-time physical health information and provide timely precise stimulations or treatments.Thus,the flexible bioelectronics are playing increasingly important roles in human-health monitoring and disease treatment,which will significantly change the future of healthcare as well as our relationships with electronics.This review summarizes recent major progress in the development of flexible substrates or encapsulation materials,sensors,circuits and energy-autonomous powers toward digital healthcare monitoring,emphasizing its role in biomedical applications in vivo and problems in practical applications.A future perspective into the challenges and opportunities in emerging flexible bioelectronics designs for the next-generation healthcare monitoring systems is also presented.Guang Yao Chenhui Yin Qian Wang Tianyao Zhang Sihong Chen Chang Lu Kangning Zhao Weina Xu Taisong Pan Min Gao Yuan Lin 2020Journal of Materiomics2020,6,2:2
12TSP-1 promotes glomerular mesangial cell proliferation and extracellular matrix secretion in Thy-1 nephritis rats显示文摘The proliferation of glomerular mesangial cells (GMC) and secretion of the extracellular matrix (ECM) in rat with Thy-1 nephritis (Thy-1N) resembling human mesangioproliferative glomerulonephritis have been explored for many years; however, the molecular mechanisms of GMC proliferation and ECM production remain unclear. Our previous studies have demonstrated that the thrombospondin-1 (TSP-1) gene was involved in mediating rat GMC proliferation and ECM synthesis induced by sublytic C5b-9 in vitro. In the present study, the roles of the TSP-1 gene in GMC proliferation, ECM production, and urinary protein secretion in Thy-1N rats were determined by using TSP-1 small hairpin RNA, and the results revealed that silencing of the TSP-1 gene in rat renal tissues could diminish GMC proliferation (P < 0.01) and ECM secretion (P < 0.01) as well as urinary protein secretion (P < 0.05) in Thy-1N rats. Together, the current findings suggested that TSP-1 gene expression was required for GMC proliferation and ECM production in Thy-1N rats.Wen Qiu Yan Li Jianbo Zhou Chenhui Zhao Jing Zhang Kai Shan Dan Zha Yingwei Wang 2011The Journal of Biomedical Research2011,25,6:2
13MOF-derived Co_(9)S_(8) nano-flower cluster array modified separator towards superior lithium sulfur battery显示文摘Lithium sulfur batteries with high energy density are thought to be the most potential energy storage technology that can be commercialized.However,the shuttle effect of polysulfides deteriorates its electrochemical performance.Herein,a novel Co_(9)S_(8)nanostructure derived from metal organic framework material(MOF)was explored by simple liquid phase reaction and heat vulcanization of2-methylimidazole and Co(NO_(3))_(2)·6 H_(2)O on the surface of the original PP separator.The Co_(9)S_(8)nano-flower cluster array wall was vertically and closely arranged with the thickness of 200 nm,and the polysulfide can be adsorbed by its physical and chemical action to slow down the'shuttle effect'.It is found that the cell with the modified separator can achieve an ideal discharge capacity of about 600 mAh/g at 1 C.The specific capacity is maintained at 500 mAh/g after 200 cycles,with only 0.11%of capacity decay per cycle.It provides a new way for the utilization of MOF material derivatives to modify the separator in order to improve the electrochemical performance of lithium-sulfur batteries.Qi Wang Hanqing Zhao Boya Li Chenhui Yang Mingyang Li Yanan Li Peng Han Miaomiao Wu Tengyu Li Ruiping Liu 2021Chinese Chemical Letters2021,32,3:2
14Establishment of customized mouse stem cell lines by sequential nuclear transfer显示文摘治疗学的克隆,胚胎的干细胞(转换字符) 由此从原子转移(NT ) 被导出胚胎,可以在再生药的新时代起一个主要作用。Inthis 学习我们建立了四十原子转移 -- 从不同施主房间类型或段落的 NTembryos 被导出的转换字符(NT 转换字符) 线。我们发现 NT 转换字符能够形成胚胎植物或动物身体。另外, NT 转换字符表示了 pluripotency 干细胞标记试管内并且能区分进胚胎的纸巾体内。从施主房间能形成完整的术语的早经过 R1 的 NT 胚胎开发了小狗,而那些为为实时出生是必要的 reprogramming 从迟了的经过 R1 ES 施主房间失去了潜力。我们随后建立了近来从 NT 胚囊被开发的 sequentialNT-R1-ESC 线经过 R1 转换字符施主。然而,当在他们的早段落用作原子转移施主时,这些 NT-R1-ESC 排队,没能导致实时小狗。这显示用顺序的 NT 转换字符的治疗学的克隆过程不能救居住在以前的施主代的发展缺乏。Chunli Zhao Ruqiang Yao Jie Hao Chenhui Ding Yong Fan Xiangpeng Dai Wei Li Tang Hai Zichuan Liu Yang Yu Yingying Wang Xiaojun Hou Weizhi Ji Qi Zhou Alice Jouneau Fanyi Zeng Liu Wang 2007Cell Research2007,17,1:1
15Drosophila P75 safeguards oogenesis by preventing H3K9me2 spreading显示文摘Serving as a host factor for human immunodeficiency virus(HIV)integration,LEDGF/p75 has been under extensive study as a potential target for therapy.However,as a highly conserved protein,its physiological function remains to be thoroughly elucidated.Here,we characterize the molecular function of dP75,the Drosophila homolog of LEDGF/p75,during oogenesis.dP75 binds to transcriptionally active chromatin with its PWWP domain.The C-terminus integrase-binding domain-containing region of dP75 physically interacts with the histone kinase Jil-1 and stabilizes it in vivo.Together with Jil-1,dP75 prevents the spreading of the heterochromatin mark-H3 K9 me2-onto genes required for oogenesis and piRNA production.Without dP75,ectopical silencing of these genes disrupts oogenesis,activates transposons,and causes animal sterility.We propose that dP75,the homolog of an HIV host factor in Drosophila,partners with and stabilizes Jil-1 to ensure gene expression during oogenesis by preventing ectopic heterochromatin spreading.Kun Dou Yanchao Liu Yingpei Zhang Chenhui Wang Ying Huang ZZ Zhao Zhang 2020Journal of Genetics and Genomics2020,47,4:1
16New State Recovery Attacks on the Grain v1 Stream Cipher显示文摘The Grain v1 stream cipher is one of the seven finalists in the final e STREAM portfolio. Though many attacks have been published,no recovery attack better than exhaustive key search on full Grain v1 in the single key setting has been found yet. In this paper,new state recovery attacks on Grain v1 utilizing the weak normality order of the employed keystream output function in the cipher are proposed. These attacks have remarkable advantages in the offline time,online time and memory complexities,which are all better than exhaustive key search. The success probability of each new attack is 0.632. The proposed attack primarily depends on the order of weak normality of the employed keystream output function. This shows that the weak normality order should be carefully considered when designing the keystream output functions of Grain-like stream ciphers.Lin Ding Chenhui Jin Jie Guan Shaowu Zhang Junzhi Li Hong Wang Wei Zhao 2016China Communications2016,13,11:1
17Integrated effects of selected ions on 2,4,6-trinitrotoluene-removal by O3/H2O2显示文摘Yaoguo Wu Chenhui Zhao Qiuhua Wang 2006Journal of Hazardous Materials2006,132,:1
18Analysis and Design Innovation on Underground Gasifier for Medium-Deep Coal Seam显示文摘Over the past 80 years,dozens of underground coal gasification(UCG)mine field tests have been carried out around the world.However,in the early days,only a small number of shallow UCG projects in the former Soviet Union achieved commercialised production.In this century,a few pilot projects in Australia also achieved short-term small-scale commercialised production using modern UCG technology.However,the commercialisation of UCG,especially medium-deep UCG projects with good development prospects but difficult underground engineering conditions,has not progressed smoothly around the world.Considering investment economy,a single gasifier must realise a high daily output and accumulated output,as well as hold a long gasification tunnel to control a large number of coal resources.However,a long gasification tunnel can easily be affected by blockages and failure,for which the remedial solutions are difficult and expensive,which greatly restricts the investment economy.The design of the underground gasifier determines the success or failure of UCG projects,and it also requires the related petroleum engineering technology.Combining the advantages of the linear horizontal well(L-CRIP)and parallel horizontal well(P-CRIP),this paper proposes a new design scheme for an“inclined ladder”underground gasifier.That is to say,the combination of the main shaft of paired P-CRIP and multiple branch horizontal well gasification tunnels is adopted to realise the control of a large number of coal resources in a single gasifier.The completion of the main shaft by well cementation is beneficial for maintaining the integrity of the main shaft and the stability of the main structure.The branch horizontal well is used as the gasification tunnel,but the length and number of retracting injection points are limited,effectively reducing the probability of blockage or failure.The branch horizontal well spacing can be adjusted flexibly to avoid minor faults and large cracks,which is conducive to increasing the resource utilisation rate.In addition,for multi-layer thin coal seams or ultra-thick coal seams,a multi-layer gasifier sharing vertical well sections can be deployed,thereby saving investment on the vertical well sections.Through preliminary analysis,this gasifier design scheme can be realised in engineering,making it suitable for largescale deployment where it can increase the resource utilisation rate and ensure stable and controllable operations.The new gasifier has outstanding advantages in investment economy,and good prospects for application in the commercial UCG projects of medium-deep coal seams.Kong Lingfeng Zhan Enqiang Zhao Chenhui 2019China Oil & Gas2019,26,4:1
19IL-17 induces NSCLC cell migration and invasion by elevating MMP19 gene transcription and expression through the interaction of p300-dependent STAT3-K631 acetylation and its Y705-phosphorylation显示文摘The cancer cell metastasis is a major death reason for patients with non-small cell lung cancer(NSCLC).Although researchers have disclosed that interleukin 17(IL-17)can increase matrix metalloproteinases(MMPs)induction causing NSCLC cell metastasis,the underlying mechanism remains unclear.In the study,we found that IL-17 receptor A(IL-17RA),p300,p-STAT3,Ack-STAT3,and MMP19 were up-regulated both in NSCLC tissues and NSCLC cells stimulated with IL-17.p300,STAT3 and MMP19 overexpression or knockdown could raise or reduce IL-17-induced p-STAT3,Ack-STAT3 and MMP19 level as well as the cell migration and invasion.Mechanism investigation revealed that STAT3 and p300 bound to the same region(−544 to−389 nt)of MMP19 promoter,and p300 could acetylate STAT3-K631 elevating STAT3 transcriptional activity,p-STAT3 or MMP19 expression and the cell mobility exposed to IL-17.Meanwhile,p300-mediated STAT3-K631 acetylation and its Y705-phosphorylation could interact,synergistically facilitating MMP19 gene transcription and enhancing cell migration and invasion.Besides,the animal experiments exhibited that the nude mice inoculated with NSCLC cells by silencing p300,STAT3 or MMP19 gene plus IL-17 treatment,the nodule number,and MMP19,Ack-STAT3,or p-STAT3 production in the lung metastatic nodules were all alleviated.Collectively,these outcomes uncover that IL-17-triggered NSCLC metastasis involves up-regulating MMP19 expression via the interaction of STAT3-K631 acetylation by p300 and its Y705-phosphorylation,which provides a new mechanistic insight and potential strategy for NSCLC metastasis and therapy.WEN GE YA LI YUTING RUAN NINGXIA WU PEI MA TONGPENG XU YONGQIAN SHU YINGWEI WANG WEN QIU CHENHUI ZHAO 2024Oncology Research2024,32,4:0
20Timing and Single-pulse Study of Pulsar J1909+0122 Discovered by CRAFTS显示文摘We report the discovery of PSR J1909+0122 by the Five-hundred-meter Aperture Spherical Radio Telescope(FAST)as part of the Commensal Radio Astronomy FAST Survey.PSR J1909+0122 has a spin period of 1.257 s and a dispersion measure of 186.2 pc cm^(-3).The averaged pulse profile shows two distinct components.We performed a single-pulse study based on a one-hour observation at 1.25 GHz on 2021 August 23.We used a threshold of 5σ_(ep) to measure the nulling fraction(NF)as 63%±1.5%.The longitude-resolved fluctuation spectra and fast Fourier transform spectra of the binary sequences revealed the quasi-periodicity of nulling with a period of 30 rotation periods.We examined the reliability of the periodicity by comparing it to random noise injection.The NF,E,and modulation periodicity P_(M) of PSR J1909+0122 were compared with other periodic nulling pulsars,showing that the source of J1909+0122 has the second largest NF in the population.Long-term timing observations over six months were used to derive the phase-connected ephemeris of this pulsar.The measured P and P values disfavor dipolar geometry for polar gap models,and the prediction for a space-charge-limited flow model in the case of inverse Compton scattering is only just above the death line.In this work,PSR J1909+0122 has revealed possible correlations between nulling behavior and pulsar properties,which will help to shed light on the pulsar emission mechanism and its temporal evolution in future observations.Yutong Chen Pei Wang Di Li Erbil Gügercinoğlu Rushuang Zhao Lingqi Meng Jianping Yuan Jiarui Niu Weiwei Zhu Yi Feng Chenchen Miao Chenhui Niu Qingdong Wu Na Wang Shen Wang Xiaoyao Xie Mengyao Xue Jumei Yao Mao Yuan Shanping You Xuhong Yu Youling Yue Jie Zhang Junshuo Zhang Lei Zhang Yabiao Wang Zhenye Gan Yuxi Li Zhongyi Sun Chengjie Wang 2023Research in Astronomy and Astrophysics2023,23,8:0
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