77 results on '"JIANWEN ZHOU"'
Search Results
2. Concentration of nodal solutions for semiclassical quadratic Choquard equations
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Lu Yang, Xiangqing Liu, and Jianwen Zhou
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choquard equation ,sign-changing solution ,perturbation method ,fredholm operator ,nodal solution ,Mathematics ,QA1-939 - Published
- 2023
3. Mechanisms of vemurafenib-induced anti-tumor effects in ATC FRO cells
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Jingwei Xu, Di Xue, Yang Li, Jianwen Zhou, Hongyue Chen, and Li Fan
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Vemurafenib ,Anaplastic thyroid carcinoma ,BANCR ,PI3K/AKT pathway ,Proliferation and metastasis ,Science (General) ,Q1-390 ,Social sciences (General) ,H1-99 - Abstract
Background: Anaplastic Thyroid Carcinoma (ATC) is a rare and deadly malignant tumor in humans. It is prone to developing resistance to radiotherapy and chemotherapy. Molecular targeted therapy offers a novel way to treat ATC. The BRAF mutation is closely associated with many cancers, including thyroid carcinoma. Vemurafenib, a small-molecule inhibitor, is specifically designed to target the mutant serine/threonine kinase BRAF. The objective of this study is to elucidate the regulatory mechanisms underlying the effects of vemurafenib on human anaplastic thyroid carcinoma cell line FRO and to assess its potential therapeutic role. Methods: The effects of vemurafenib on the proliferation of FRO cells were assessed by the CCK-8 method and Colony-forming assay. Transwell chambers and scratch tests were employed to examine the impact of vemurafenib on the invasion and migration of FRO cells. Apoptosis and cycle distribution of FRO cells were analyzed by tunel assay and flow cytometry. The effects of vemurafenib on the expression of BRAF-activated non-protein coding RNA (BANCR), Bax, Bcl2, and E-cadherin were evaluated by qRT-PCR. Furthermore, the effects of vemurafenib on the expression of phosphoinositol-3-kinase (PI3K)/phosphoinositol-3-kinase (AKT) pathway-related proteins, BRAF, CyclinD1, Bcl-2, Bax, and E-cadherin proteins in FRO cells were investigated through the western-blot method. All experiments were conducted in three replicates. Results: Vemurafenib was observed to inhibit proliferation and induce apoptosis in a dose- and time-dependent manner (P
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- 2024
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4. Mining Spatial-Temporal Frequent Patterns of Natural Disasters in China Based on Textual Records
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Aiai Han, Wen Yuan, Wu Yuan, Jianwen Zhou, Xueyan Jian, Rong Wang, and Xinqi Gao
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natural disaster events ,spatial-temporal frequent patterns ,spatial-temporal intervals ,GraMi algorithm ,Information technology ,T58.5-58.64 - Abstract
Natural disasters pose serious threats to human survival. With global warming, disaster chains related to extreme weather are becoming more common, making it increasingly urgent to understand the relationships between different types of natural disasters. However, there remains a lack of research on the frequent spatial-temporal intervals between different disaster events. In this study, we utilize textual records of natural disaster events to mine frequent spatial-temporal patterns of disasters in China. We first transform the discrete spatial-temporal disaster events into a graph structure. Due to the limit of computing power, we reduce the number of edges in the graph based on domain expertise. We then apply the GraMi frequent subgraph mining algorithm to the spatial-temporal disaster event graph, and the results reveal frequent spatial-temporal intervals between disasters and reflect the spatial-temporal changing pattern of disaster interactions. For example, the pattern of sandstorms happening after gales is mainly concentrated within 50 km and rarely happens at farther spatial distances, and the most common temporal interval is 1 day. The statistical results of this study provide data support for further understanding disaster association patterns and offer decision-making references for disaster prevention efforts.
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- 2024
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5. Autonomous Parking Path Tracking Control Based on Interference Suppression
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Maofei Zhu, Qian Liu, Jianwen Zhou, Wei Sha, and Runxin Niu
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Autonomous parking ,path tracking ,extended state observer ,interference suppression ,sliding mode control ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
Owing to the increased demand for autonomous driving and advanced driver assistant systems, autonomous parking configurations have been widely researched. In order to solve the problem of path tracking accuracy degradation, caused by ignoring the external interference in the actual parking process and the uncertainty of vehicle steering modeling, a parking path tracking algorithm, combining Sliding Model Control (SMC) and Extended State Observer (ESO), is proposed. First, the vehicle kinematics model is established, which includes many external interference factors, such as lateral position, speed, heading angle, uncertainty parameters and time delay of steering mechanism. Considering the vehicle physical constraints and boundary condition constraints, during the parking process, the parking reference path is designed according to reverse outbound driving, while the parking collision analysis and path smoothing are further carried out. Next, an ESO is designed to observe and compensate the external disturbances and model uncertainties, treating these as the total disturbances of the system. On this basis, a SMC for parallel parking path tracking is designed. The observed value of ESO is used as the compensation in the SMC, to weaken the influence of external interference. Finally, using Matlab simulation, the feasibility and effectiveness of the proposed path planning and tracking control method are verified. The simulation results show that, the maximum tracking error of lateral position is less than 0.01m, whereas the maximum tracking error of heading angle is less than 2.5°. Comparing two control strategies, the control effect of the designed SMC with ESO is better than that of the traditional SMC controller, while the ability of resisting external interference is stronger. In addition, real vehicle tests are carried out, to verify the effectiveness of the proposed control method. The test results show that, the vehicle can safely park in the parking space, quickly and accurately, even if there is external interference. The proposed method can produce the parking trajectory according to the given constraints and control the vehicle to complete the parking operation accurately along the planned path.
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- 2023
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6. The Sign-Changing Solution for Fractional (p,q)-Laplacian Problems Involving Supercritical Exponent
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Jianwen Zhou, Chengwen Gong, and Wenbo Wang
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fractional (p,q)-Laplacian problem ,supercritical exponent ,sign-changing solution ,Thermodynamics ,QC310.15-319 ,Mathematics ,QA1-939 ,Analysis ,QA299.6-433 - Abstract
In this article, we consider the following fractional (p,q)-Laplacian problem (−Δ)ps1u+(−Δ)qs2u+V(x)(|u|p−2u+|u|q−2u)=f(u)+λ|u|r−2u, where x∈RN, (−Δ)ps1 is the fractional p-Laplacian operator ((−Δ)qs2 is similar), 0
0 is small. - Published
- 2024
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7. Co-Delivery of Gemcitabine and Honokiol by Lipid Bilayer-Coated Mesoporous Silica Nanoparticles Enhances Pancreatic Cancer Therapy via Targeting Depletion of Tumor Stroma
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Dan Liu, Linjiang Wang, Henan Li, Dong Li, Jianwen Zhou, Jing Wang, Qi Zhang, and Defu Cai
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gemcitabine ,honokiol ,lipid bilayer-coated mesoporous silica nanoparticles ,syndecan-1 ,targeting tumor stroma ,Organic chemistry ,QD241-441 - Abstract
Syndecan-1 (SDC1) modified lipid bilayer (LB)-coated mesoporous silica nanoparticles (MSN) to co-deliver gemcitabine (GEM) and honokiol (HNK) were prepared for the targeting treatment of pancreatic cancer. The encapsulation efficiencies of GEM and HNK in SDC1-LB-MSN-GEM/HNK were determined to be 60.3 ± 3.2% and 73.0 ± 1.1%. The targeting efficiency of SDC1-LB-MSN-GEM/HNK was investigated in BxPC-3 cells in vitro. The fluorescence intensity in the cells treated with SDC1-LB-MSN-Cou6 was 2-fold of LB-MSN-Cou6-treated cells, which was caused by SDC1/IGF1R-mediated endocytosis. As anticipated, its cytotoxicity was significantly increased. Furthermore, the mechanism was verified that SDC1-LB-MSN-HNK induced tumor cell apoptosis through the mitochondrial apoptosis pathway. Finally, the biodistribution, tumor growth inhibition, and preliminary safety studies were performed on BALB/c nude mice bearing BxPC-3 tumor models. The tumor growth inhibition index of SDC1-LB-MSN-GEM/HNK was 56.19%, which was 1.45-fold and 1.33-fold higher than that of the free GEM/HNK and LB-MSN-GEM/HNK treatment groups, respectively. As a result, SDC1-LB-MSN-GEM/HNK combined advantages of both GEM and HNK and simultaneously targeted and eliminated pancreatic cancerous and cancer-associated stromal cells. In summary, the present study demonstrated a new strategy of synergistic GEM and HNK to enhance the therapeutic effect of pancreatic cancer via the targeting depletion of tumor stroma.
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- 2024
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8. Research Progress on CT Radiomics of Esophageal Cancer
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Jianwen ZHOU and Feng FENG
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in-depth study ,ct radiomics ,esophageal cancer ,Geophysics. Cosmic physics ,QC801-809 ,Medicine (General) ,R5-920 - Abstract
Esophageal cancer which results in a relatively higher death rate is one of the most common cancers throughout the world. CT radiomics is a study to extract radiomics characteristics which are generalized from a large amount of CT images. These characteristics then underwent high-throughput quantitative analysis so that more heterogeneity information of the caner can be obtained. CT radiomics has been gradually used in forecast clinical stages and pathological differentiation of esophageal cancer in recent years, and applied in assessment of treatment effect and prognosis evaluation as well. This paper focuses on the application of CT radiomics in esophageal cancer and its progress.
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- 2022
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9. Altered regional brain activity and functional connectivity in resting-state brain networks associated with psychological erectile dysfunction
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Xue Liu, Shaowei Liu, Tao Liu, Liang Tang, Mufan Ji, Yan Xu, Ziliang Xiang, Jianwen Zhou, Yun Chen, and Jianhuai Chen
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psychological erectile dysfunction ,resting state ,functional magnetic resonance imaging ,fractional amplitude of low-frequency fluctuation ,functional connectivity ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
IntroductionErectile dysfunction (ED), especially psychological ED (pED), is usually accompanied with psychological factors, which are related to abnormal activity in brain regions involved in sexual behavior. However, the mechanisms underlying functional changes in the brain of pED are still unclear. The present study aimed to explore the abnormalities of brain function, as well as their relationships with sexual behavior and emotion in pED patients.Materials and methodsResting state functional magnetic resonance imaging (rs-fMRI) data were collected from 31 pED patients to 31 healthy controls (HCs). The values of amplitude of fractional amplitude of low-frequency fluctuation (fALFF) and functional connectivity (FC) were calculated and compared between groups. In addition, the associations between abnormal brain regions and clinical features were evaluated by Pearson correlation analyses.ResultsCompared to HCs, pED patients demonstrated decreased fALFF values in the left medial superior frontal gyrus (had decreased FC values with the left dorsolateral superior frontal gyrus), the left lingual gyrus (had decreased FC values with the left parahippocamal gyrus and insula), the left putamen (had decreased FC values with the right caudate) and the right putamen (had decreased FC values with the left putamen and the right caudate). The fALFF values of the left medial superior frontal gyrus were negatively correlated with the fifth item scores of International Index of Erectile Function (IIEF-5). Negative relationships were found between fALFF values of the left putamen and the second item scores of Arizona Sexual Scale (ASEX). FC values between the right putamen and caudate were negatively related to the state scores of State-Trait Anxiety Inventory (STAI-S).ConclusionAltered brain function were found in the medial superior frontal gyrus and caudate-putamen of pED patients, which were associated with sexual function and psychological condition. These findings provided new insights into the central pathological mechanisms of pED.
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- 2023
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10. S-asymptotically ω-periodic dynamics in a fractional-order dual inertial neural networks with time-varying lags
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Huizhen Qu and Jianwen Zhou
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inertial ,neural network ,mittag-leffler ,global asymptotical stability ,s-asymptotical periodicity ,Mathematics ,QA1-939 - Abstract
This paper investigates global dynamics in fractional-order dual inertial neural networks with time lags. Firstly, according to some crucial features of Mittag-Leffler functions and Banach contracting mapping principle, the existence and uniqueness of S-asymptotically ω-periodic oscillation of the model are gained. Secondly, by using the comparison principle and the stability criteria of delayed Caputo fractional-order differential equations, global asymptotical stability of the model is studied. In the end, the feasibility and effectiveness of the obtained conclusions are supported by two numerical examples. There are few papers focus on S-asymptotically ω-periodic dynamics in fractional-order dual inertial neural networks with time-varying lags, apparently, the works in this paper fill some of the gaps.
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- 2022
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11. Bifurcation for a fractional-order Lotka-Volterra predator–prey model with delay feedback control
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Zhouhong Li, Wei Zhang, Chengdai Huang, and Jianwen Zhou
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fractional-order ,lotka-volterra predator–prey system ,bifurcation control ,delay feedback control ,Mathematics ,QA1-939 - Abstract
This paper addresses the bifurcation control of a fractional-order Lokta-Volterra predator– prey model by using delay feedback control. By employing time delay as a bifurcation parameter, the conditions of bifurcation are gained for controlled systems. Then, it indications that the onset of bifurcation can be postponed as feedback gain decreases. An example numerical results are ultimately exploited to validate the correctness of the the proposed scheme.
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- 2021
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12. Mittag-Leffler Euler ∇-differences for Caputo fractional-order systems
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Tianwei Zhang, Yongkun Li, and Jianwen Zhou
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Caputo ,Implicit Euler ,PECE algorithm ,Short-term memory ,Mittag-Leffler Euler difference operator ,Physics ,QC1-999 - Abstract
Exponential Euler differences have got rapid development recently for integer-order differential equations. But there are few papers focusing on this difference to fractional differential equations. This paper establishes the basic structure of Mittag-Leffler implicit Euler scheme for fractional differential equations by using the constant variation methods in fractional calculus. More critically, since the acquired difference forms belong to the scope of implicit Euler differences and then the fractional PECE algorithms are proposed to solve these implicit differences in numerical calculations effectively. Besides, a novel nonlocal difference operator is proposed and some relative properties are presented. In the end, the existence and boundedness of a unique globally exponentially stable solution of some nonlocal difference system with short-term memory are investigated. Some calculative examples and numerical simulations are given to illustrate the primary research findings.
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- 2022
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13. A High-mass, Young Star-forming Core Escaping from Its Parental Filament
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Zhiyuan Ren, Xi Chen, Tie Liu, Emma Mannfors, Leonardo Bronfman, Fengwei Xu, Siyi Feng, Hongli Liu, Fanyi Meng, Amelia M. Stutz, Shanghuo Li, Chang Won Lee, Ke Wang, Jianwen Zhou, Di Li, Chen Wang, Chakali Eswaraiah, Anandmayee Tej, Long-Fei Chen, and Hui Shi
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Star formation ,Young stellar objects ,Dense interstellar clouds ,Interstellar filaments ,Gravitational collapse ,Astrophysics ,QB460-466 - Abstract
We studied the unique kinematic properties in massive filament G352.63-1.07 at 10 ^3 au spatial scale with the dense molecular tracers observed with the Atacama Large Millimeter/submillimeter Array. We find the central massive core M1 (12 M _⊙ ) being separated from the surrounding filament with a velocity difference of $v-{\overline{v}}_{\mathrm{sys}}=-2\,\mathrm{km}\,{{\rm{s}}}^{-1}$ and a transverse separation within 3″. Meanwhile, as shown in multiple dense-gas tracers, M1 has a spatial extension closely aligned with the main filament and is connected to the filament toward both its ends. M1 thus represents a very beginning state for a massive, young star-forming core escaping from the parental filament, within a timescale of ∼4000 yr. Based on its kinetic energy (3.5 × 10 ^44 erg), the core escape is unlikely solely due to the original filament motion or magnetic field but requires more energetic events such as a rapid intense anisotropic collapse. The released energy also seems to noticeably increase the environmental turbulence. This may help the filament to become stabilized again.
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- 2023
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14. Direct Observational Evidence of the Multi-scale, Dynamical Mass Accretion Toward a High-mass Star-forming Hub-filament System
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Dongting Yang, Hong-Li Liu, Anandmayee Tej, Tie Liu, Patricio Sanhueza, Sheng-Li Qin, Xing Lu, Ke Wang, Sirong Pan, Feng-Wei Xu, Enrique Vázquez-Semadeni, Shanghuo Li, Gilberto C. Gómez, Aina Palau, Guido Garay, Paul F. Goldsmith, Mika Juvela, Anindya Saha, Leonardo Bronfman, Chang Won Lee, Ken’ichi Tatematsu, Lokesh Dewangan, Jianwen Zhou, Yong Zhang, Amelia Stutz, Chakali Eswaraiah, L. Viktor Toth, Isabelle Ristorcelli, Xianjin Shen, Anxu Luo, and James O. Chibueze
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Star forming regions ,Molecular clouds ,Infrared dark clouds ,Young stellar objects ,Molecular gas ,Dust continuum emission ,Astrophysics ,QB460-466 - Abstract
There is growing evidence that high-mass star formation and hub-filament systems (HFS) are intricately linked. The gas kinematics along the filaments and the forming high-mass star(s) in the central hub are in excellent agreement with the new generation of global hierarchical high-mass star formation models. In this paper, we present an observational investigation of a typical HFS cloud, G310.142+0.758 (G310 hereafter), which reveals unambiguous evidence of mass inflow from the cloud scale via the filaments onto the forming protostar(s) at the hub conforming with the model predictions. Continuum and molecular line data from the ATOMS and MALT90 surveys that cover different spatial scales are used. Three filaments (with a total mass of 5.7 ± 1.1 × 10 ^3 M _⊙ ) are identified converging toward the central hub region where several signposts of high-mass star formation have been observed. The hub region contains a massive clump (1280 ± 260 M _⊙ ) harboring a central massive core. Additionally, five outflow lobes are associated with the central massive core implying a forming cluster. The observed large-scale, smooth, and coherent velocity gradients from the cloud down to the core scale, and the signatures of infall motion seen in the central massive clump and core, clearly unveil a nearly continuous, multi-scale mass accretion/transfer process at a similar mass infall rate of ∼10 ^−3 M _⊙ yr ^−1 over all scales, feeding the central forming high-mass protostar(s) in the G310 HFS cloud.
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- 2023
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15. Almost Automorphic Strong Oscillation in Time-Fractional Parabolic Equations
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Tianwei Zhang, Yongkun Li, and Jianwen Zhou
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strong solution ,almost automorphy ,Galerkin ,Fourier ,Picard ,Thermodynamics ,QC310.15-319 ,Mathematics ,QA1-939 ,Analysis ,QA299.6-433 - Abstract
This paper gives some results on almost automorphic strong solutions to time-fractional partial differential equations by employing a mix o thef Galerkin method, Fourier series, and Picard iteration. As an application, the existence, uniqueness, and global Mittag–Leffler convergence of almost automorphic strong solution are discussed to a concrete time-fractional parabolic equations. To the best of our knowledge, this is the first study on almost automorphic strong solutions on this subject.
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- 2023
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16. On the Existence of Solutions for a Class of Schrödinger–Kirchhoff-Type Equations with Sign-Changing Potential
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Guocui Yang, Jianwen Zhou, and Shengzhong Duan
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Mathematics ,QA1-939 - Abstract
In this paper, we consider the following Kirchhoff problem −a+b∫R3∇u2dxΔu+λVxu=up−2u, in R3u∈H1R3 where a,b>0 are constants, λ is a positive parameter, and 4
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- 2022
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17. 2p-th mean dynamic behaviors for semi-discrete stochastic competitive neural networks with time delays
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Tianwei Zhang, Zhouhong Li, and Jianwen Zhou
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competitive neural networks ,semi discreteness ,stochastic process ,fixed point theory ,Mathematics ,QA1-939 - Abstract
In this article, a novel semi-discrete model for stochastic competitive neural networks (SCNNs) is proposed. At first, taking advantage of some famous inequalities and fixed point theory, a few conditions are obtained for the existence of 2p-th mean almost periodic sequence (MAPS) of the semi-discrete stochastic model. In the next palace, 2p-th moment global exponential stability (MGES) of the above model is discussed as well. The research findings exhibit the stochastic and delayed effects on the mean dynamics of the semi-discrete stochastic networks. In the end, some numerical illustrations are presented to visually expound the feasibility of the works in this paper. The methods in this article could be applied to investigate other models in the areas of science and engineering.
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- 2020
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18. Chitosan-capped enzyme-responsive hollow mesoporous silica nanoplatforms for colon-specific drug delivery
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Defu Cai, Cuiyan Han, Chang Liu, Xiaoxing Ma, Jiayi Qian, Jianwen Zhou, Yue Li, Yiming Sun, Changting Zhang, and Wenquan Zhu
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Hollow mesoporous silica spheres ,Colon specific drug delivery ,Enzyme-responsive ,Doxorubicin ,Materials of engineering and construction. Mechanics of materials ,TA401-492 - Abstract
Abstract An enzyme-responsive colon-specific delivery system was developed based on hollow mesoporous silica spheres (HMSS) to which biodegradable chitosan (CS) was attached via cleavable azo bonds (HMSS–N=N–CS). Doxorubicin (DOX) was encapsulated in a noncrystalline state in the hollow cavity and mesopores of HMSS with the high loading amount of 35.2%. In vitro drug release proved that HMSS–N=N–CS/DOX performed enzyme-responsive drug release. The grafted CS could increase the biocompatibility and stability and reduce the protein adsorption on HMSS. Gastrointestinal mucosa irritation and cell cytotoxicity results indicated the good biocompatibility of HMSS and HMSS–N=N–CS. Cellular uptake results indicated that the uptake of DOX was obviously increased after HMSS–N=N–CS/DOX was preincubated with a colonic enzyme mixture. HMSS–N=N–CS/DOX incubated with colon enzymes showed increased cytotoxicity, and its IC50 value was three times lower than that of HMSS–N=N–CS/DOX group without colon enzymes. The present work lays the foundation for subsequent research on mesoporous carriers for oral colon-specific drug delivery.
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- 2020
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19. Mitochondrial Deficits With Neural and Social Damage in Early-Stage Alzheimer’s Disease Model Mice
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Afzal Misrani, Sidra Tabassum, Qingwei Huo, Sumaiya Tabassum, Jinxiang Jiang, Adeel Ahmed, Xiangmao Chen, Jianwen Zhou, Jiajia Zhang, Sha Liu, Xiaoyi Feng, Cheng Long, and Li Yang
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Alzheimer’s disease ,hippocampus ,medial prefrontal cortex ,mitochondrial dynamics ,social interaction ,Neurosciences. Biological psychiatry. Neuropsychiatry ,RC321-571 - Abstract
Alzheimer’s disease (AD) is the most common neurodegenerative disorder worldwide. Mitochondrial dysfunction is thought to be an early event in the onset and progression of AD; however, the precise underlying mechanisms remain unclear. In this study, we investigated mitochondrial proteins involved in organelle dynamics, morphology and energy production in the medial prefrontal cortex (mPFC) and hippocampus (HIPP) of young (1∼2 months), adult (4∼5 months) and aged (9∼10, 12∼18 months) APP/PS1 mice. We observed increased levels of mitochondrial fission protein, Drp1, and decreased levels of ATP synthase subunit, ATP5A, leading to abnormal mitochondrial morphology, increased oxidative stress, glial activation, apoptosis, and altered neuronal morphology as early as 4∼5 months of age in APP/PS1 mice. Electrophysiological recordings revealed abnormal miniature excitatory postsynaptic current in the mPFC together with a minor connectivity change between the mPFC and HIPP, correlating with social deficits. These results suggest that abnormal mitochondrial dynamics, which worsen with disease progression, could be a biomarker of early-stage AD. Therapeutic interventions that improve mitochondrial function thus represent a promising approach for slowing the progression or delaying the onset of AD.
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- 2021
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20. Solvability of Nonlinear Impulsive Generalized Fractional Differential Equations with (p,q)-Laplacian Operator via Critical Point Theory
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Jianwen Zhou, Yuqiong Liu, Yanning Wang, and Jianfeng Suo
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(p,q)-Laplacian operator ,generalized fractional differential operator ,mountain pass theorem ,impulse ,Thermodynamics ,QC310.15-319 ,Mathematics ,QA1-939 ,Analysis ,QA299.6-433 - Abstract
In this paper, we consider the nonlinear impulsive generalized fractional differential equations with (p,q)-Laplacian operator for 1
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- 2022
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21. Analysis of Genetic Diversity and Population Structure in Three Forest Musk Deer Captive Populations with Different Origins
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Jiamin Fan, Xueli Zheng, Hongyong Wang, Hong Qi, Benmo Jiang, Meiping Qiao, Jianwen Zhou, and Shuhai Bu
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Forest musk deer ,Genetic variation ,Population structure ,Musk secretion ,RAD sequence ,Genetics ,QH426-470 - Abstract
Musk deer (Moschidae), whose secretion is an expensive and irreplaceable component of traditional medicine, have become endangered in the wild due to habitat fragmentation and over-exploitation. In recent years, China has had success in the artificial breeding of forest musk deer, thus relieving the pressure on wild populations. However, many farmed populations are experiencing degradation, and little genetic information is available for conservation management. In this study, we selected 274 individuals from three typical captive populations (originated from the Ta-pa Mountains (Tp), the midrange of the Qinling Mountains (Ql) and the Western Sichuan Plateau (WS), respectively) to evaluate the genetic variations. A total of more than 3.15 billion high-quality clean reads and 4.37 million high-quality SNPs were generated by RAD sequencing. Based on the analysis, we found that captive forest musk deer populations exhibit a relatively low level of genetic diversity. Ql displayed a higher level of genetic diversity than the Tp and WS populations. Tp and WS had experienced population bottlenecks in the past as inferred from the values of Tajima’s D. There were high levels of heterozygote deficiency caused by inbreeding within the three populations. Population structure analysis suggested that the three populations have evolved independently, and a moderate amount of genetic differentiation has developed, although there was a low level of gene flow between the Ql and Tp populations. Furthermore, the average quantities of musk secreted by musk deer in the Tp and WS populations were significantly higher than that in the Ql population. The present genetic information should be considered in management plans for the conservation and utilization of musk deer from captive breeding.
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- 2019
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22. Combined using of paclitaxel and salinomycin active targeting nanostructured lipid carriers against non-small cell lung cancer and cancer stem cells
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Jianwen Zhou, Mingshuang Sun, Shanshan Jin, Li Fan, Wenquan Zhu, Xiaoyu Sui, Lixin Cao, Chunrong Yang, and Cuiyan Han
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nanostructured lipid carriers ,salinomycin ,paclitaxel ,combined therapy ,active targeting ,Therapeutics. Pharmacology ,RM1-950 - Abstract
The existing of avidity cancer stem cells (CSCs) made it an optical strategy to kill cancer cells and CSCs at the same time. Here, we constructed a CSCs specific nanocarrier naming T-S-NLC using the CD133+ targeting peptide TISWPPR (TR) as the targeting moiety attached to the distal end of PEG on salinomycin (Sal) loaded nanostructured lipid carriers (NLC), its pharmaceutical characteristics proved it 128.73 ± 2.09 nm, anionic spheroid with sustained release profile. It's in vitro targeting effect in CD133+ CSCs indicated that it exhibited superior CSCs internalization over non-modified NLC or free drug. Afterwards, it was used in combination with previously designed EGFR specific A-P-NLC (AEYLR peptide-PEG-modified paclitaxel loaded NLC) to achieve the goal to kill the cancer cells and CSCs, simultaneously. The in vitro tumor targeting effect of T-S-NLC + A-P-NLC was affirmed by cellular uptake and proliferation inhibition effect in NCI-H1299 and S180 cell lines showing advanced results over single preparation groups. In vivo tumor targeting effect in S180 tumor-bearing mice also validated the better tumor accumulative effect of the combined group. Last but not least, the in vivo antitumor effect strongly identified the greater tumor suppression effect of T-S-NLC + A-P-NLC than single preparation groups or combined use of free drugs while maintaining a good living state of the mice. To sum up, the combined usage of PTX and Sal active targeting NLC naming A-P-NLC + T-S-NLC which killed cancer cells and CSCs at the same time was a promising drug delivery system.
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- 2019
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23. Three-Point Boundary Value Problems of Coupled Nonlocal Laplacian Equations
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Huizhen Qu, Jianwen Zhou, and Tianwei Zhang
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nonlocal Laplace ,coupled system ,green function ,eigenvalues’ expansion ,Fourier ,Mathematics ,QA1-939 - Abstract
This paper discusses a kind of coupled nonlocal Laplacian evolution equation with Caputo time-fractional derivatives and proportional delays. Green function and mild solution are firstly established by employing the approach of eigenvalues’ expansions and Fourier analysis technique. By the properties of eigenvalues and Mittag–Leffler functions, several vital estimations of Green functions are presented. In view of these estimations and some appropriate assumptions, the existence and uniqueness of the mild solution are studied by utilizing the Leray–Schauder fixed-point theorem and the Banach fixed-point theorem. Finally, an example is provided to illustrate the effectiveness of our main results.
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- 2022
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24. On the Ground State to Hamiltonian Elliptic System with Choquard’s Nonlinear Term
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Wenbo Wang, Jianwen Zhou, and Yongkun Li
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Physics ,QC1-999 - Abstract
In the present paper, we consider the following Hamiltonian elliptic system with Choquard’s nonlinear term −Δu+Vxu=∫ΩGvy/x−yβdygv in Ω,−Δv+Vxv=∫ΩFuy/x−yαdyfu in Ω,u=0,v=0 on ∂Ω,where Ω⊂ℝN is a bounded domain with a smooth boundary, 0
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- 2020
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25. Variational Approach for the Variable-Order Fractional Magnetic Schrödinger Equation with Variable Growth and Steep Potential in ℝN∗
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Jianwen Zhou, Bianxiang Zhou, Liping Tian, and Yanning Wang
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Physics ,QC1-999 - Abstract
In this paper, we show the existence of solutions for an indefinite fractional Schrödinger equation driven by the variable-order fractional magnetic Laplace operator involving variable exponents and steep potential. By using the decomposition of the Nehari manifold and variational method, we obtain the existence results of nontrivial solutions to the equation under suitable conditions.
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- 2020
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26. Fractional Sobolev’s Spaces on Time Scales via Conformable Fractional Calculus and Their Application to a Fractional Differential Equation on Time Scales
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Yanning Wang, Jianwen Zhou, and Yongkun Li
- Subjects
Physics ,QC1-999 - Abstract
Using conformable fractional calculus on time scales, we first introduce fractional Sobolev spaces on time scales, characterize them, and define weak conformable fractional derivatives. Second, we prove the equivalence of some norms in the introduced spaces and derive their completeness, reflexivity, uniform convexity, and compactness of some imbeddings, which can be regarded as a novelty item. Then, as an application, we present a recent approach via variational methods and critical point theory to obtain the existence of solutions for a p-Laplacian conformable fractional differential equation boundary value problem on time scale T: Tα(Tαup-2Tα(u))(t)=∇F(σ(t),u(σ(t))), Δ-a.e. t∈a,bTκ2, u(a)-u(b)=0, Tα(u)(a)-Tα(u)(b)=0, where Tα(u)(t) denotes the conformable fractional derivative of u of order α at t, σ is the forward jump operator, a,b∈T, 01, and F:[0,T]T×RN→R. By establishing a proper variational setting, we obtain three existence results. Finally, we present two examples to illustrate the feasibility and effectiveness of the existence results.
- Published
- 2016
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- View/download PDF
27. Periodic solutions for neutral functional differential equations with impulses on time scales
- Author
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Yongkun Li, Xiaoyan Dou, and Jianwen Zhou
- Subjects
Positive periodic solution ,neutral functional differential ,equations ,impulses ,Krasnoselskii fixed point ,time scales ,Mathematics ,QA1-939 - Abstract
Let $mathbb{T}$ be a periodic time scale. We use Krasnoselskii's fixed point theorem to show that the neutral functional differential equation with impulses $$displaylines{ x^{Delta}(t)=-A(t)x^sigma(t)+g^Delta(t,x(t-h(t)))+f(t,x(t),x(t-h(t))),quad teq t_j,;tinmathbb{T},cr x(t_j^+)= x(t_j^-)+I_j(x(t_j)), quad jin mathbb{Z}^+ }$$ has a periodic solution. Under a slightly more stringent conditions we show that the periodic solution is unique using the contraction mapping principle.
- Published
- 2012
28. Multiple periodic solutions for a fourth-order discrete Hamiltonian system
- Author
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Yongkun Li and Jianwen Zhou
- Subjects
Discrete Hamiltonian systems ,Periodic solutions ,Critical points ,Mathematics ,QA1-939 - Abstract
By means of a three critical points theorem proposed by Brezis and Nirenberg and a general version of Mountain Pass Theorem, we obtain some multiplicity results for periodic solutions of a fourth-order discrete Hamiltonian system Δ4u(t-2)+∇ F(t,u(t))=0 for all t∈ Z.
- Published
- 2010
29. MicroRNA-155 promotes glioma cell proliferation via the regulation of MXI1.
- Author
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Jianwen Zhou, Wei Wang, Zhenhua Gao, Xueling Peng, Xulin Chen, Wei Chen, Weiyi Xu, Haixiong Xu, Marie C Lin, and Songshan Jiang
- Subjects
Medicine ,Science - Abstract
Gliomas are the most common and aggressive primary tumors in the central nervous system. Recently, Max interactor-1 (MXI1), an antagonist of c-Myc that is involved in brain tumor progression, has been reported to be deregulated in a variety of tumors including glioma. However, the mechanism of MXI1 deregulation in gliomas remains unclear. In this study, we show that the relative expression level of MXI1 is markedly down-regulated in glioma cell lines. Using integrated bioinformatic analysis and experimental confirmation, we identified several miRNAs by screening a panel of predicted miRNAs that may regulate the MXI1 3'UTR. The strongest inhibitory miRNA, miR-155, can attenuate the activity of a luciferase reporter gene that is fused with the MXI1 3'UTR and decrease the expression levels of MXI1 mRNA and protein in U87 glioma cells. The potential role of miR-155 in promoting glioma cell proliferation by targeting MXI1 was confirmed in various glioma cell lines by rescue experiments using MTT assays, EdU incorporation assay, and cell counting experiments. In addition, we determined that the level of MXI1 mRNA was inversely correlated with the expression of miR-155 in 18 sets of glioblastoma multiforme specimens. These findings reveal for the first time that the targeting of MXI1 by miR-155 may result in a reduction in MXI1 expression and promote glioma cell proliferation; this result suggests a novel function of miR-155 in targeting MXI1 in glioma-genesis.
- Published
- 2013
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30. Large-scale screens of miRNA-mRNA interactions unveiled that the 3'UTR of a gene is targeted by multiple miRNAs.
- Author
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Peng Zhou, Weiyi Xu, Xueling Peng, Zhenhua Luo, Qinghe Xing, Xulin Chen, Chengqian Hou, Weihong Liang, Jianwen Zhou, Xiaoyan Wu, Zhou Songyang, and Songshan Jiang
- Subjects
Medicine ,Science - Abstract
Animal microRNA (miRNA) target prediction is still a challenge, although many prediction programs have been exploited. MiRNAs exert their function through partially binding the messenger RNAs (mRNAs; likely at 3' untranslated regions [3'UTRs]), which makes it possible to detect the miRNA-mRNA interactions in vitro by co-transfection of miRNA and a luciferase reporter gene containing the target mRNA fragment into mammalian cells under a dual-luciferase assay system. Here, we constructed a human miRNA expression library and used a dual-luciferase assay system to perform large-scale screens of interactions between miRNAs and the 3'UTRs of seven genes, which included more than 3,000 interactions with triplicate experiments for each interaction. The screening results showed that the 3'UTR of one gene can be targeted by multiple miRNAs. Among the prediction algorithms, a Bayesian phylogenetic miRNA target identification algorithm and a support vector machine (SVM) presented a relatively better performance (27% for EIMMo and 24.7% for miRDB) against the average precision (17.3%) of the nine prediction programs used here. Additionally, we noticed that a relatively high conservation level was shown at the miRNA 3' end targeted regions, as well as the 5' end (seed region) binding sites.
- Published
- 2013
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- View/download PDF
31. Existence of Solutions for a Class of Damped Vibration Problems on Time Scales
- Author
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Yongkun Li and Jianwen Zhou
- Subjects
Mathematics ,QA1-939 - Published
- 2010
- Full Text
- View/download PDF
32. S-asymptotically to-periodic dynamics in a fractional-order genetic regulatory network with time lags.
- Author
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Huizhen Qu and Jianwen Zhou
- Subjects
- *
TIME-varying networks , *LIFE sciences , *DIFFERENTIAL equations - Abstract
This paper considers a class of Caputo fractional-order genetic regulatory networks with time-varying lags in biomedicine and life sciences. Applying some features of Mittag-Leffler function and contraction mapping principle, the sufficient conditions are gained to ensure the existence and uniqueness of S-asymptotically co-periodic solution of the model. Based on comparison principle and stability theorem of linear delayed Caputo fractional-order differential equations, global asymptotical stability of the model is also investigated. The work of this article can improve and expand some existing results. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
33. TBK1 phosphorylation activates LIR-dependent degradation of the inflammation repressor TNIP1
- Author
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Jianwen Zhou, Nikoline Lander Rasmussen, Hallvard Lauritz Olsvik, Vyacheslav Akimov, Zehan Hu, Gry Evjen, Stéphanie Kaeser-Pebernard, Devanarayanan Siva Sankar, Carole Roubaty, Pauline Verlhac, Nicole van de Beek, Fulvio Reggiori, Yakubu Princely Abudu, Blagoy Blagoev, Trond Lamark, Terje Johansen, Jörn Dengjel, Microbes in Health and Disease (MHD), and Center for Liver, Digestive and Metabolic Diseases (CLDM)
- Subjects
DNA-Binding Proteins ,Inflammation ,Autophagy ,Humans ,Cell Biology ,Phosphorylation ,Protein Serine-Threonine Kinases ,HeLa Cells - Abstract
Limitation of excessive inflammation due to selective degradation of pro-inflammatory proteins is one of the cytoprotective functions attributed to autophagy. In the current study, we highlight that selective autophagy also plays a vital role in promoting the establishment of a robust inflammatory response. Under inflammatory conditions, here TLR3-activation by poly(I:C) treatment, the inflammation repressor TNIP1 (TNFAIP3 interacting protein 1) is phosphorylated by Tank-binding kinase 1 (TBK1) activating an LIR motif that leads to the selective autophagy-dependent degradation of TNIP1, supporting the expression of pro-inflammatory genes and proteins. This selective autophagy efficiently reduces TNIP1 protein levels early (0–4 h) upon poly(I:C) treatment to allow efficient initiation of the inflammatory response. At 6 h, TNIP1 levels are restored due to increased transcription avoiding sustained inflammation. Thus, similarly as in cancer, autophagy may play a dual role in controlling inflammation depending on the exact state and timing of the inflammatory response.
- Published
- 2023
34. Evidence of high-mass star formation through multi-scale mass accretion in hub-filament-system clouds
- Author
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Hong-Li Liu, Anandmayee Tej, Tie Liu, Patricio Sanhueza, Sheng-Li Qin, Jinhua He, Paul F Goldsmith, Guido Garay, Sirong Pan, Kaho Morii, Shanghuo Li, Amelia Stutz, Ken’ichi Tatematsu, Feng-Wei Xu, Leonardo Bronfman, Anindya Saha, Namitha Issac, Tapas Baug, L Viktor Toth, Lokesh Dewangan, Ke Wang, Jianwen Zhou, Chang Won Lee, Dongting Yang, Anxu Luo, Xianjin Shen, Yong Zhang, Yue-Fang Wu, Zhiyuan Ren, Xun-Chuan Liu, Archana Soam, Siju Zhang, and Qiu-Yi Luo
- Subjects
Astrophysics - Solar and Stellar Astrophysics ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies ,Solar and Stellar Astrophysics (astro-ph.SR) - Abstract
We present a statistical study of a sample of 17 hub-filament-system (HFS) clouds of high-mass star formation using high-angular resolution ($\sim$1-2 arcsecond) ALMA 1.3mm and 3mm continuum data. The sample includes 8 infrared (IR)-dark and 9 IR-bright types, which correspond to an evolutionary sequence from the IR-dark to IR-bright stage. The central massive clumps and their associated most massive cores are observed to follow a trend of increasing mass ($M$) and mass surface density ($\Sigma$) with evolution from IR-dark to IR-bright stage. In addition, a mass-segregated cluster of young stellar objects (YSOs) are revealed in both IR-dark and IR-bright HFSs with massive YSOs located in the hub and the population of low-mass YSOs distributed over larger areas. Moreover, outflow feedback in all HFSs are found to escape preferentially through the inter-filamentary diffuse cavities, suggesting that outflows would render a limited effect on the disruption of the HFSs and ongoing high-mass star formation therein. From the above observations, we suggest that high-mass star formation in the HFSs can be described by a multi-scale mass accretion/transfer scenario, from hub-composing filaments through clumps down to cores, that can naturally lead to a mass-segregated cluster of stars., Comment: Accepted for publication in MNRAS; 16 pages, 8 figures, and 3 tables
- Published
- 2023
35. ATOMS: ALMA Three-millimeter Observations of Massive Star-forming regions -- XV. Steady Accretion from Global Collapse to Core Feeding in Massive Hub-filament System SDC335
- Author
-
Feng-Wei Xu, Ke Wang, Tie Liu, Paul F Goldsmith, Qizhou Zhang, Mika Juvela, Hong-Li Liu, Sheng-Li Qin, Guang-Xing Li, Anandmayee Tej, Guido Garay, Leonardo Bronfman, Shanghuo Li, Yue-Fang Wu, Gilberto C Gómez, Enrique Vázquez-Semadeni, Ken’ichi Tatematsu, Zhiyuan Ren, Yong Zhang, L Viktor Toth, Xunchuan Liu, Nannan Yue, Siju Zhang, Tapas Baug, Namitha Issac, Amelia M Stutz, Meizhu Liu, Gary A Fuller, Mengyao Tang, Chao Zhang, Lokesh Dewangan, Chang Won Lee, Jianwen Zhou, Jinjin Xie, Wenyu Jiao, Chao Wang, Rong Liu, Qiuyi Luo, Archana Soam, and Chakali Eswaraiah
- Subjects
Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics - Astrophysics of Galaxies - Abstract
We present ALMA Band-3/7 observations towards "the Heart" of a massive hub-filament system (HFS) SDC335, to investigate its fragmentation and accretion. At a resolution of $\sim0.03$ pc, 3 mm continuum emission resolves two massive dense cores MM1 and MM2, with $383(^{+234}_{-120})$ $M_\odot$ (10-24% mass of "the Heart") and $74(^{+47}_{-24})$ $M_\odot$, respectively. With a resolution down to 0.01 pc, 0.87 mm continuum emission shows MM1 further fragments into six condensations and multi-transition lines of H$_2$CS provide temperature estimation. The relation between separation and mass of condensations at a scale of 0.01 pc favors turbulent Jeans fragmentation where the turbulence seems to be scale-free rather than scale-dependent. We use the H$^{13}$CO$^+$ (1-0) emission line to resolve the complex gas motion inside "the Heart" in position-position-velocity space. We identify four major gas streams connected to large-scale filaments, inheriting the anti-clockwise spiral pattern. Along these streams, gas feeds the central massive core MM1. Assuming an inclination angle of $45(\pm15)^{\circ}$ and a H$^{13}$CO$^+$ abundance of $5(\pm3)\times10^{-11}$, the total mass infall rate is estimated to be $2.40(\pm0.78)\times10^{-3}$ $M_\odot$ yr$^{-1}$, numerically consistent with the accretion rates derived from the clump-scale spherical infall model and the core-scale outflows. The consistency suggests a continuous, near steady-state, and efficient accretion from global collapse, therefore ensuring core feeding. Our comprehensive study of SDC335 showcases the detailed gas kinematics in a prototypical massive infalling clump and calls for further systematic and statistical analyses in a large sample., 29 pages, 7 figures, Accepted for publication in MNRAS
- Published
- 2023
36. S-asymptotically ω-periodic dynamics in a fractional-order dual inertial neural networks with time-varying lags
- Author
-
Jianwen Zhou and Huizhen Qu
- Subjects
Physics ,global asymptotical stability ,Inertial frame of reference ,Artificial neural network ,neural network ,General Mathematics ,s-asymptotical periodicity ,Dynamics (mechanics) ,Order (ring theory) ,mittag-leffler ,inertial ,Topology ,Omega ,Dual (category theory) ,QA1-939 ,Mathematics - Abstract
This paper investigates global dynamics in fractional-order dual inertial neural networks with time lags. Firstly, according to some crucial features of Mittag-Leffler functions and Banach contracting mapping principle, the existence and uniqueness of $ S $-asymptotically $ \omega $-periodic oscillation of the model are gained. Secondly, by using the comparison principle and the stability criteria of delayed Caputo fractional-order differential equations, global asymptotical stability of the model is studied. In the end, the feasibility and effectiveness of the obtained conclusions are supported by two numerical examples. There are few papers focus on $ S $-asymptotically $ \omega $-periodic dynamics in fractional-order dual inertial neural networks with time-varying lags, apparently, the works in this paper fill some of the gaps.
- Published
- 2022
37. The pyruvate dehydrogenase complex regulates mitophagic trafficking and protein phosphorylation.
- Author
-
Kolitsida, Panagiota, Nolic, Vladimir, Jianwen Zhou, Stumpe, Michael, Niemi, Natalie M., Dengjel, Jörn, and Abeliovich, Hagai
- Published
- 2023
- Full Text
- View/download PDF
38. ATOMS : ALMA three-millimeter observations of massive star-forming regions - VII. A catalogue of SiO clumps from ACA observations
- Author
-
Rong Liu, Tie Liu, Gang Chen, Hong-Li Liu, Ke Wang, Jin-Zeng Li, Chang Won Lee, Xunchuan Liu, Mika Juvela, Guido Garay, Lokesh Dewangan, Archana Soam, Leonardo Bronfman, Jinhua He, Chakali Eswaraiah, Si-Ju Zhang, Yong Zhang, Feng-Wei Xu, L Viktor Tóth, Zhi-Qiang Shen, Shanghuo Li, Yue-Fang Wu, Sheng-Li Qin, Zhiyuan Ren, Guoyin Zhang, Anandmayee Tej, Paul F Goldsmith, Tapas Baug, Qiuyi Luo, Jianwen Zhou, Chang Zhang, and Department of Physics
- Subjects
radio lines: ISM ,II ,stars: formation ,LINE EMISSION ,FOS: Physical sciences ,INTERSTELLAR JETS ,Astronomy and Astrophysics ,115 Astronomy, Space science ,Astrophysics - Astrophysics of Galaxies ,ISM: clouds ,ISM: molecules ,stars: massive ,ISM: jets and outflows ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,MOLECULAR OUTFLOWS - Abstract
To understand the nature of SiO emission, we conducted ACA observations of the SiO (2-1) lines toward 146 massive star-forming regions, as part of the ALMA Three-millimeter Observations of Massive Star-forming regions (ATOMS) survey. We detected SiO emission in 128 (87.7$\%$) sources and identified 171 SiO clumps, 105 of which are spatially separated from 3 mm continuum emission. A large amount of the SiO line profiles (60$\%$) are non-Gaussian. The velocity dispersion of the SiO lines ranges from 0.3 to 5.43 km s$^{-1}$. In 63 sources the SiO clumps are associated with H$_\rm{II}$ regions characterized by H40$\alpha$ emission. We find that 68$\%$ (116) of the SiO clumps are associated with strong outflows. The median velocity dispersion of the SiO line for outflow sources and non-outflow sources is 1.91 km s$^{-1}$ and 0.99 km s$^{-1}$, respectively. These results indicate that outflow activities could be connected to strongly shocked gas. The velocity dispersion and [SiO]/[H$^{13}$CO$^+$] intensity ratio do not show any correlation with the dust temperature and particle number density of clumps. We find a positive correlation between the SiO line luminosity and the bolometric luminosity, implying stronger shock activities are associated with more luminous proto-clusters. The SiO clumps in associations with H$_\rm{II}$ regions were found to show a steeper feature in $L_\rm{sio}$/$L_\rm{bol}$. The SiO line luminosity and the fraction of shocked gas have no apparent evidence of correlation with the evolutionary stages traced by luminosity to mass ratio ($L_\rm{bol}/M$)., Comment: 18 pages, 10 figures
- Published
- 2022
39. Cancer cell membrane-coated mesoporous silica loaded with superparamagnetic ferroferric oxide and Paclitaxel for the combination of Chemo/Magnetocaloric therapy on MDA-MB-231 cells
- Author
-
Xiaoxing Ma, Jiayi Qian, Wenquan Zhu, Jianwen Zhou, Cuiyan Han, Defu Cai, and Likun Liu
- Subjects
Paclitaxel ,Biological Transport, Active ,Nanoparticle ,lcsh:Medicine ,Breast Neoplasms ,Article ,chemistry.chemical_compound ,Drug Delivery Systems ,Biomimetic Materials ,Cell Line, Tumor ,Humans ,Magnetite Nanoparticles ,skin and connective tissue diseases ,lcsh:Science ,Cell Proliferation ,Multidisciplinary ,Drug discovery ,Oral cancer ,Cell Membrane ,lcsh:R ,Hyperthermia, Induced ,Mesoporous silica ,Silicon Dioxide ,Antineoplastic Agents, Phytogenic ,Combined Modality Therapy ,Membrane ,Magnetic hyperthermia ,chemistry ,Drug delivery ,Cancer cell ,Female ,lcsh:Q ,Nuclear chemistry ,Superparamagnetism - Abstract
To effectively inhibit the growth of breast cancer cells (MDA-MB-231 cells) by the combination method of chemotherapy and magnetic hyperthermia, we fabricated a biomimetic drug delivery (CSiFePNs) system composed of mesoporous silica nanoparticles (MSNs) containing superparamagnetic ferroferric oxide and Paclitaxel (PTX) coated with MDA-MB-231 cell membranes (CMs). In the in vitro cytotoxicity tests, the MDA-MB-231 cells incubated with CSiFePNs obtained IC50 value of 0.8 μgL−1, 3.5-fold higher than that of SiFePNs. The combination method of chemotherapy and magnetic hyperthermia can effectively inhibit the growth of MDA-MB-231 cells.
- Published
- 2019
40. ATOMS : ALMA three-millimeter observations of massive star-forming regions - III. Catalogues of candidate hot molecular cores and hyper/ultra compact H II regions
- Author
-
Juan Li, Ya-Ping Peng, Yong Zhang, Diego Mardones, Sung-ju Kang, X.-W. Liu, Yuefang Wu, Jeong-Eun Lee, Sheng-Yuan Liu, Chang Won Lee, Amelia M. Stutz, Hong-Li Liu, Mengyao Tang, Maria Cunningham, Eswaraiah Chakali, Rodrigo H. Álvarez-Gutiérrez, Mika Juvela, Hee-Weon Yi, Qizhou Zhang, Chao Zhang, Zhi-Qiang Shen, Qiu-Yi Luo, Feng-Wei Xu, Leonardo Bronfman, Guido Garay, Zhiyuan Ren, Shanghuo Li, Neal J. Evans, Rong Liu, Sheng-Li Qin, Jianwen Zhou, Yu Wang, Kee-Tae Kim, Namitha Issac, Tomoya Hirota, Feng-Yao Zhu, Anandmayee Tej, Pak Shing Li, Junzhi Wang, Jingwen Wu, Lokesh K. Dewangan, Ke Wang, L. Viktor Tóth, Tie Liu, Archana Soam, Ken'ichi Tatematsu, Di Li, Qiaowei Xue, Jin-Zeng Li, Paul F. Goldsmith, Hyeong-Sik Yun, T. Baug, Isabelle Ristorcelli, Department of Physics, Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), and Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS)
- Subjects
stars: kinematics and dynamics ,Milky Way ,Continuum (design consultancy) ,FOS: Physical sciences ,Astrophysics ,Star (graph theory) ,ISM: clouds ,01 natural sciences ,Spectral line ,Organic molecules ,H II regions ,0103 physical sciences ,010303 astronomy & astrophysics ,Solar and Stellar Astrophysics (astro-ph.SR) ,Line (formation) ,Physics ,stars: formation ,010308 nuclear & particles physics ,Star formation ,Astronomy and Astrophysics ,115 Astronomy, Space science ,Astrophysics - Astrophysics of Galaxies ,Astrophysics - Solar and Stellar Astrophysics ,[SDU]Sciences of the Universe [physics] ,13. Climate action ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,Millimeter - Abstract
We have identified 453 compact dense cores in 3 mm continuum emission maps in the ATOMS (ALMA Three-millimeter Observations of Massive Star-forming regions) survey, and compiled three catalogues of high-mass star forming cores. One catalogue, referred to as H/UC-HII catalogue, includes 89 cores that enshroud hyper/ultra compact (H/UC) HII regions as characterized by associated compact H40alpha emission. A second catalogue, referred to as pure s-cHMC, includes 32 candidate Hot Molecular Cores (HMCs) showing rich spectra (N>20lines) of complex organic molecules (COMs) but not associated with H/UC-HII regions. The third catalogue, referred to as pure w-cHMC, includes 58 candidate HMCs with relatively low levels of COM richness and not associated with H/UC-HII regions. These three catalogues of dense cores provide an important foundation for future studies of the early stages of high-mass star formation across the Milky Way. We also find that nearly half of H/UC-HII cores are candidate HMCs. From the number counts of COM-containing and H/UC-HII cores, we suggest that the duration of high-mass protostellar cores showing chemically rich features is at least comparable to the lifetime of H/UC-HII regions. For cores in the H/UC-HII catalogue, the width of the H40alpha line increases as the core size decreases, suggesting that the non-thermal dynamical and/or pressure line-broadening mechanisms dominate on the smaller scales of the H/UC-HII cores., 17 pages, five tables, and 11 figures. Accepted for publication at MNRAS
- Published
- 2021
41. Direct interaction between CD155 and CD96 promotes immunosuppression in lung adenocarcinoma
- Author
-
Hui Zhang, Junfeng Zhu, Wenting Jiang, Qiong He, Yongmei Cui, Qianwen Liu, Yiyan Lei, Yu Sun, Zunfu Ke, Zheng Zhu, and Jianwen Zhou
- Subjects
Lung Neoplasms ,CD96 ,medicine.medical_treatment ,T-Lymphocytes ,Immunology ,Adenocarcinoma of Lung ,Text mining ,Antigens, CD ,Correspondence ,Tumor Microenvironment ,Immunology and Allergy ,Medicine ,Humans ,CD155 ,Cell Proliferation ,Immunosuppression Therapy ,Lung ,biology ,business.industry ,Immunosuppression ,medicine.disease ,Prognosis ,Immunosurveillance ,Infectious Diseases ,medicine.anatomical_structure ,biology.protein ,Cancer research ,Adenocarcinoma ,Receptors, Virus ,business ,Protein Binding - Published
- 2020
42. Relationship between manifold smoothness and adversarial vulnerability in deep learning with local errors
- Author
-
Jianwen Zhou, Haiping Huang, and Zijian Jiang
- Subjects
FOS: Computer and information sciences ,Computer Science - Machine Learning ,Generalization ,Computer science ,Gaussian ,General Physics and Astronomy ,FOS: Physical sciences ,Machine Learning (stat.ML) ,02 engineering and technology ,01 natural sciences ,law.invention ,Machine Learning (cs.LG) ,symbols.namesake ,law ,Statistics - Machine Learning ,0103 physical sciences ,Neural and Evolutionary Computing (cs.NE) ,010306 general physics ,Vulnerability (computing) ,Computer Science::Cryptography and Security ,Artificial neural network ,business.industry ,Deep learning ,Computer Science - Neural and Evolutionary Computing ,Disordered Systems and Neural Networks (cond-mat.dis-nn) ,Condensed Matter - Disordered Systems and Neural Networks ,021001 nanoscience & nanotechnology ,Gaussian noise ,FOS: Biological sciences ,Quantitative Biology - Neurons and Cognition ,symbols ,Neurons and Cognition (q-bio.NC) ,Artificial intelligence ,0210 nano-technology ,business ,Manifold (fluid mechanics) ,Curse of dimensionality - Abstract
Artificial neural networks can achieve impressive performances, and even outperform humans in some specific tasks. Nevertheless, unlike biological brains, the artificial neural networks suffer from tiny perturbations in sensory input, under various kinds of adversarial attacks. It is therefore necessary to study the origin of the adversarial vulnerability. Here, we establish a fundamental relationship between geometry of hidden representations (manifold perspective) and the generalization capability of the deep networks. For this purpose, we choose a deep neural network trained by local errors, and then analyze emergent properties of trained networks through the manifold dimensionality, manifold smoothness, and the generalization capability. To explore effects of adversarial examples, we consider independent Gaussian noise attacks and fast-gradient-sign-method (FGSM) attacks. Our study reveals that a high generalization accuracy requires a relatively fast power-law decay of the eigen-spectrum of hidden representations. Under Gaussian attacks, the relationship between generalization accuracy and power-law exponent is monotonic, while a non-monotonic behavior is observed for FGSM attacks. Our empirical study provides a route towards a final mechanistic interpretation of adversarial vulnerability under adversarial attacks., 10 pages, 8 figures, to appear in Chin. Phys. B (2021)
- Published
- 2020
43. Multiplicity Results for Variable-Order Nonlinear Fractional Magnetic Schrödinger Equation with Variable Growth
- Author
-
Yanning Wang, Bianxiang Zhou, and Jianwen Zhou
- Subjects
Article Subject ,Multiplicity results ,010102 general mathematics ,Multiplicity (mathematics) ,01 natural sciences ,Schrödinger equation ,Magnetic field ,010101 applied mathematics ,symbols.namesake ,Nonlinear system ,Elliptic curve ,Variational principle ,Mountain pass theorem ,symbols ,QA1-939 ,Applied mathematics ,0101 mathematics ,Analysis ,Mathematics - Abstract
In this paper, we prove the multiplicity of nontrivial solutions for a class of fractional-order elliptic equation with magnetic field. Under appropriate assumptions, firstly, we prove that the system has at least two different solutions by applying the mountain pass theorem and Ekeland’s variational principle. Secondly, we prove that these two solutions converge to the two solutions of the limit problem. Finally, we prove the existence of infinitely many solutions for the system and its limit problems, respectively.
- Published
- 2020
- Full Text
- View/download PDF
44. On the Ground State to Hamiltonian Elliptic System with Choquard’s Nonlinear Term
- Author
-
Jianwen Zhou, Yongkun Li, and Wenbo Wang
- Subjects
Physics ,Article Subject ,Applied Mathematics ,QC1-999 ,010102 general mathematics ,Mathematical analysis ,General Physics and Astronomy ,01 natural sciences ,010101 applied mathematics ,Nonlinear system ,symbols.namesake ,Bounded function ,symbols ,0101 mathematics ,Ground state ,Hamiltonian (quantum mechanics) - Abstract
In the present paper, we consider the following Hamiltonian elliptic system with Choquard’s nonlinear term −Δu+Vxu=∫ΩGvy/x−yβdygv in Ω,−Δv+Vxv=∫ΩFuy/x−yαdyfu in Ω,u=0,v=0 on ∂Ω,where Ω⊂ℝN is a bounded domain with a smooth boundary, 0<α
- Published
- 2020
45. Permanence and uniform asymptotical stability of a ratio-dependent Leslie system with feedback controls on time scales.
- Author
-
Zhouhong Li, Jianwen Zhou, and Tianwei Zhang
- Subjects
- *
FEEDBACK control systems , *COMPUTER simulation - Abstract
Using time-scale calculus and construction of a suitable Lyapunov functional, the permanence and uniform asymptotical stability of a ratio-dependent Leslie model with feedback control on time scales are studied. The results of this paper extend some recent research results. An illustrative example with numerical simulations is employed to visually manifest the theoretical findings. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
46. Phosphorylation of mitochondrial matrix proteins regulates their selective mitophagic degradation.
- Author
-
Kolitsida, Panagiota, Jianwen Zhou, Rackiewicz, Michal, Nolic, Vladimir, Dengjel, Jörn, and Abeliovich, Hagai
- Subjects
- *
EXTRACELLULAR matrix proteins , *MITOCHONDRIAL proteins , *PHOSPHORYLATION , *PHOSPHOPROTEIN phosphatases , *PROTEIN kinases - Abstract
Mitophagy is an important quality-control mechanism in eukaryotic cells, and defects in mitophagy correlate with aging phenomena and neurodegenerative disorders. It is known that different mitochondrial matrix proteins undergo mitophagy with very different rates but, to date, the mechanism underlying this selectivity at the individual protein level has remained obscure. We now present evidence indicating that protein phosphorylation within the mitochondrial matrix plays a mechanistic role in regulating selective mitophagic degradation in yeast via involvement of the Aup1 mitochondrial protein phosphatase, as well as 2 known matrix-localized protein kinases, Pkp1 and Pkp2. By focusing on a specific matrix phosphoprotein reporter, we also demonstrate that phospho-mimetic and nonphosphorylatable point mutations at known phosphosites in the reporter increased or decreased its tendency to undergo mitophagy. Finally, we show that phosphorylation of the reporter protein is dynamically regulated during mitophagy in an Aup1-dependent manner. Our results indicate that structural determinants on a mitochondrial matrix protein can govern its mitophagic fate, and that protein phosphorylation regulates these determinants. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
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47. Biosynthesis and Regulation of Wheat Amylose and Amylopectin from Proteomic and Phosphoproteomic Characterization of Granule-binding Proteins
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Xiaobing Lu, Wenying Zhang, Guanxing Chen, Yan-Lin Liu, Yueming Yan, Caixia Han, Yanhao Xu, and Jianwen Zhou
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Models, Molecular ,Proteomics ,0301 basic medicine ,Starch ,Amylopectin ,Genes, Plant ,DNA-binding protein ,Article ,Gene Expression Regulation, Enzymologic ,03 medical and health sciences ,chemistry.chemical_compound ,Starch Synthase ,Species Specificity ,Biosynthesis ,Gene Expression Regulation, Plant ,Amylose ,Amino Acid Sequence ,Phosphorylation ,Triticum ,Plant Proteins ,Multidisciplinary ,biology ,Granule (cell biology) ,Gene Expression Regulation, Developmental ,food and beverages ,030104 developmental biology ,Biochemistry ,chemistry ,biology.protein ,Edible Grain ,Starch synthase ,Metabolic Networks and Pathways - Abstract
Waxy starch has an important influence on the qualities of breads. Generally, grain weight and yield in waxy wheat (Triticum aestivum L.) are significantly lower than in bread wheat. In this study, we performed the first proteomic and phosphoproteomic analyses of starch granule-binding proteins by comparing the waxy wheat cultivar Shannong 119 and the bread wheat cultivar Nongda 5181. These results indicate that reduced amylose content does not affect amylopectin synthesis, but it causes significant reduction of total starch biosynthesis, grain size, weight and grain yield. Two-dimensional differential in-gel electrophoresis identified 40 differentially expressed protein (DEP) spots in waxy and non-waxy wheats, which belonged mainly to starch synthase (SS) I, SS IIa and granule-bound SS I. Most DEPs involved in amylopectin synthesis showed a similar expression pattern during grain development, suggesting relatively independent amylose and amylopectin synthesis pathways. Phosphoproteome analysis of starch granule-binding proteins, using TiO2 microcolumns and LC-MS/MS, showed that the total number of phosphoproteins and their phosphorylation levels in ND5181 were significantly higher than in SN119, but proteins controlling amylopectin synthesis had similar phosphorylation levels. Our results revealed the lack of amylose did not affect the expression and phosphorylation of the starch granule-binding proteins involved in amylopectin biosynthesis.
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- 2016
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48. Fractional Sobolev’s Spaces on Time Scales via Conformable Fractional Calculus and Their Application to a Fractional Differential Equation on Time Scales
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Jianwen Zhou, Yongkun Li, and Yanning Wang
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Article Subject ,Applied Mathematics ,Physics ,QC1-999 ,010102 general mathematics ,Mathematical analysis ,General Physics and Astronomy ,Conformable matrix ,01 natural sciences ,Convexity ,Fractional calculus ,010101 applied mathematics ,Sobolev space ,Compact space ,Jump ,Applied mathematics ,Boundary value problem ,0101 mathematics ,Laplace operator ,Mathematics - Abstract
Using conformable fractional calculus on time scales, we first introduce fractional Sobolev spaces on time scales, characterize them, and define weak conformable fractional derivatives. Second, we prove the equivalence of some norms in the introduced spaces and derive their completeness, reflexivity, uniform convexity, and compactness of some imbeddings, which can be regarded as a novelty item. Then, as an application, we present a recent approach via variational methods and critical point theory to obtain the existence of solutions for ap-Laplacian conformable fractional differential equation boundary value problem on time scaleT: Tα(Tαup-2Tα(u))(t)=∇F(σ(t),u(σ(t))),Δ-a.e. t∈a,bTκ2,u(a)-u(b)=0,Tα(u)(a)-Tα(u)(b)=0,whereTα(u)(t)denotes the conformable fractional derivative ofuof orderαatt,σis the forward jump operator,a,b∈T, 01, andF:[0,T]T×RN→R. By establishing a proper variational setting, we obtain three existence results. Finally, we present two examples to illustrate the feasibility and effectiveness of the existence results.
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- 2016
49. TnI and IL-18 levels are associated with prognosis of sepsis.
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Qinghua Wu, Zhaoyang Xiao, Yanan Pu, Jianwen Zhou, Dehuai Wang, Zhiyong Huang, Dongnan Hou, Wu, Qinghua, Xiao, Zhaoyang, Pu, Yanan, Zhou, Jianwen, Wang, Dehuai, Huang, Zhiyong, and Hou, Dongnan
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DIABETIC nephropathies ,BRAIN natriuretic factor ,SEPSIS - Abstract
Aim: To evaluate the diagnostic value of interleukin-18 (IL-18) and troponin (TnI) in sepsis.Methods: This retrospective analysis included 117 patients with sepsis (patient group) and 92 subjects who attended regular physical examinations (control group). We compared IL-18 and TnI expressions before treatment (T1) and on day 5 (T2), day 10 (T3) and day 15 (T4) of treatment. Acute Physiology and Chronic Health Evaluation II (APACHE II) guidelines were used to analyse the correlation between IL-18, TnI and APACHE II scores.Results: At T1, T2, T3 and T4, the IL-18 and TnI levels were all higher in the patient group than in the control group (p<0.001). In the patient group, peak IL-18 and TnI levels were noted at T1, followed by T2, T3 and T4 (p<0.001). The linear correlation analysis revealed positive correlations between IL-18 and TnI levels and APACHE II score (r =0.759, 0.866, p <0.001). The 3-year survival rates of subjects with high IL-18 or TnI expression levels were all lower than of those with low expression levels (p=0.047, 0.048). In patients with sepsis, the expression of TnI and IL-18 is high and is positively correlated with APACHE II scores.Conclusions: Monitoring TnI and IL-18 levels can effectively evaluate the severity and recovery of patients with sepsis. [ABSTRACT FROM AUTHOR]- Published
- 2019
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50. Azidothymidine inhibits cell growth and telomerase activity and induces DNA damage in human esophageal cancer.
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HAOLI WANG, YANHUI LIU, JIANWEN ZHOU, QIONG HE, and YU DONG
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AZIDOTHYMIDINE ,ESOPHAGEAL cancer ,TELOMERASE regulation ,SURVIVAL analysis (Biometry) ,METHODS in Electrophoresis - Abstract
Esophageal cancer is one of the most common type of malignancies. Telomerase activity, which is absent or weakly detected in the majority of human somatic cells, is elevated in esophageal cancer. Although azidothymidine (AZT), a reverse transcriptase inhibitor, has been utilized as a treatment for tumors, its role in treating esophageal cancer has not been confirmed. The aim of the present study was to determine the effect of AZT on telomerase activity and the proliferation of the human esophageal cancer cell line TE‑11. A telomeric repeat amplification assay was utilized to detect telomerase activity following treatment of TE‑11 cells with AZT. The effect of AZT on TE‑11 cell cycle distribution was determined by flow cytometry. Cellular DNA damage was evaluated by a comet assay and an MTT assay demonstrated that AZT significantly inhibited the viability of TE‑11 cells, in a time‑and dose‑dependent manner. In addition, TE‑11 cells treated with various concentrations of AZT exhibited a significant reduction in telomerase activity and percentage of cells in the G1/G0 phase, and an increase in the percentage of cells in the S phase. High doses of AZT caused DNA damage, and enhanced the expression levels of γ‑H2A histone family member X and phosphorylated checkpoint kinase 2 in TE‑11 cells. These results demonstrated that AZT effectively inhibits proliferation of the TE‑11 human esophageal cancer cell line in vitro. The growth inhibitory effects were associated with a reduction in telomerase activity, S and G2/M phase cell cycle arrest, and enhanced DNA damage, suggesting that AZT may be utilized in the clinic for the treatment of esophageal cancer. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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