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A strange star scenario for the formation of eccentric millisecond pulsar PSR J1946+3417

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Research in Astronomy and Astrophysics 2021年第9期21卷 185-192页

作者： Long Jiang Na Wang wen-cong chen Wei-Min Liu Chun-Wei Leng Jian-Ping Yuan Xiang-Li Qian Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China School of Science Qingdao University of TechnologyQingdao 266525China School of Physics and Electrical Information Shangqiu Normal UniversityShangqiu 476000China Department of Intelligent Engineering Shandong Management UniversityJinan 250357China

PSR J1946+3417 is a millisecond pulsar(MSP)with a spin period P?3.17 *** in a binary with an orbital period Pb?27 days,the MSP is accompanied by a white dwarf(WD).The masses of the MSP and the WD were determined to be 1.83 M⊙,and 0.266 M⊙,***,its orbital eccentricity is e?0.134,which is challenging the recycling model of *** that the neutron star in a binary may collapse to a strange star when its mass reaches a critical limit,we propose a phase transition(PT)scenario to account for the origin of the *** sudden mass loss and the kick induced by asymmetric collapse during the PT may result in the orbital *** the PT event takes place after the mass transfer ceases,the eccentric orbit cannot be re-circularized in the Hubble *** at the masses of both components,we simulate the evolution of the progenitor of PSR J1946+3417 via *** simulations show that an NS/main sequence star binary with initial masses of 1.4+1.6 M⊙in an initial orbit of 2.59 days will evolve into a binary consisting of a 2.0 M⊙MSP and a 0.27 M⊙WD in an orbit of~21.5 *** that the gravitational mass loss fraction during PT is 10%,we simulate the effect of PT via the kick program of BSE with a velocity ofσPT=60 km *** results show that the PT scenario can reproduce the observed orbital period and eccentricity with higher probability than other values.

关键词： stars:neutron stars:evolution pulsars:individual(J1946+3417)

On the Formation of the Double Neutron Star Binary PSR J1846-0513

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Research in Astronomy and Astrophysics 2024年第11期24卷 259-267页

作者： Long Jiang Kun Xu Shuai Zha Yun-Lang Guo Jian-Ping Yuan Xiang-Li Qian wen-cong chen Na Wang School of Science Qingdao University of TechnologyQingdao 266525China Xinjiang Astronomical Observatory Chinese Academy of SciencesUrumqi 830011China School of Physics and Electrical Information Shangqiu Normal UniversityShangqiu 476000China Yunnan Observatories Chinese Academy of SciencesKunming 650216China Department of Astronomy Nanjing UniversityNanjing 210023China Department of Intelligent Engineering Shandong Management UniversityJinan 250357China

The double neutron star PSR J1846-0513 is discovered by the Five-hundred-meter Aperture Spherical radio Telescope(FAST)in Commensal Radio Astronomy FAST *** pulsar is revealed to be harbored in an eccentric orbit with e=0.208 and an orbital period of 0.613 *** total mass of the system is constrained to b2.6287(35)M_(⊙),with a mass upper limit of 1.3455 M_(⊙)for the pulsar and a mass lower limit of 1.2845 M_(⊙)for th companion *** reproduce its evolution history,we perform a 1D model for the formation of PSR J1846-0513whose progenitor is assumed to be neutron star—helium(He)star system via MESA *** the larg eccentricity is widely believed to originate from an asymmetric supernova explosion,we also investigate th dynamical effects of the supernova *** simulated results show that the progenitor of PSR J1846-0513could be a binary system consisting of a He star of 3.3-4.0 M_(⊙)and a neutron star in a circular orbit with an initia period of~0.5 day.

关键词： stars evolution stars neutron (stars:)binaries general stars individual(PSR J1864-0513)

Peripheral mitochondrial DNA as a neuroinflammatory biomarker for major depressive disorder

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Neural Regeneration Research 2025年第6期20卷 1541-1554页

作者： Jinmei Ye cong Duan Jiaxin Han Jinrong chen Ning Sun Yuan Li Tifei Yuan Daihui Peng Division of Mood Disorder Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Department of Psychiatry First Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Shanghai Key Laboratory of Psychotic Disorders Brain Health InstituteNational Center for Mental DisordersShanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Co-Innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina

In the pathogenesis of major depressive disorder, chronic stress-related neuroinflammation hinders favorable prognosis and antidepressant response. Mitochondrial DNA may be an inflammatory trigger, after its release from stress-induced dysfunctional central nervous system mitochondria into peripheral circulation. This evidence supports the potential use of peripheral mitochondrial DNA as a neuroinflammatory biomarker for the diagnosis and treatment of major depressive disorder. Herein, we critically review the neuroinflammation theory in major depressive disorder, providing compelling evidence that mitochondrial DNA release acts as a critical biological substrate, and that it constitutes the neuroinflammatory disease pathway. After its release, mitochondrial DNA can be carried in the exosomes and transported to extracellular spaces in the central nervous system and peripheral circulation. Detectable exosomes render encaged mitochondrial DNA relatively stable. This mitochondrial DNA in peripheral circulation can thus be directly detected in clinical practice. These characteristics illustrate the potential for mitochondrial DNA to serve as an innovative clinical biomarker and molecular treatment target for major depressive disorder. This review also highlights the future potential value of clinical applications combining mitochondrial DNA with a panel of other biomarkers, to improve diagnostic precision in major depressive disorder.

关键词： biomarker cytokine exosomes inflammasome major depressive disorder microglia mitochondrial DNA mitochondrial dysfunction neuroinflammation Toll-like receptor

Wave effect of gravitational waves intersected with a microlens field Ⅱ:An adaptive hierarchical tree algorithm and population study

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 241-254页

作者： Xikai Shan Guoliang Li Xuechun chen wen Zhao Bin Hu Shude Mao Department of Astronomy Tsinghua University Purple Mountain Observatory Chinese Academy of Sciences Institute for Frontier in Astronomy and Astrophysics Beijing Normal University School of Physics and Astronomy Beijing Normal University School of Astronomy and Space Science University of Science and Technology of China CAS Key Laboratory for Researches in Galaxies and Cosmology Department of Astronomy University of Science and Technology of ChinaChinese Academy of Sciences

The gravitational lensing wave effect generated by a microlensing field embedded in a lens galaxy is an inevitable phenomenon in strong lensed gravitational waves （SLGWs）.This effect presents both challenges and opportunities for the detection and application of ***,investigating this wave effect requires computing a complete diffraction integral over each microlens in the *** is extremely time-consuming due to the large number of microlenses （10～3-10～6）.Therefore,simply adding all the microlenses is ***,the complexity of the time delay surface makes the lens plane resolution a crucial factor in controlling numerical *** this paper,we propose a trapezoid approximation-based adaptive hierarchical tree algorithm to meet the challenges of calculation speed and *** find that this algorithm accelerates the calculation by four orders of magnitude compared to the simple adding method and is one order of magnitude faster than the fixed hierarchical tree algorithm proposed for electromagnetic *** importantly,our algorithm ensures controllable numerical errors,increasing confidence in the *** with our previous work （***.66,239511,2023）,this paper addresses all numerical issues,including integral convergence,precision,and computational time1).Finally,we conducted a population study on the microlensing wave effect of SLGWs using this algorithm and found that the microlensing wave effect cannot be ignored,especially for Type II SLGWs （from saddle position of the time delay surface） due to their intrinsic geometric structures and their typical intersection with a denser microlensing ***,more than 33%（11%） of SLGWs have a mismatch larger than 1%（3%） compared to the unlensed ***,we found that the mismatch between signal pairs in a doubly imaged GW is generally larger than 10-3,and 61%（25%） of signal pairs have a mismatch larger than 1%（3%）.Therefo

关键词： gravitational lensing diffractional integral algorithm gravitational wave

Effects of Bifidobacterium lactis BLa80 on fecal and mucosal flora and stem cell factor/c-kit signaling pathway in simulated microgravity rats

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World Journal of Gastroenterology 2025年第1期31卷 93-109页

作者： Ping Zhang Ying Zhu Pu chen Tong Zhou Zhe-Yi Han Jun Xiao Jian-Feng Ma wen Ma Peng Zang Ying chen Graduate School Hebei North UniversityZhangjiakou 075000Hebei ProvinceChina Key Laboratory of Aerospace Nutrition and Food Engineering China Astronaut Research and Training CenterBeijing 100094China Department of Gastroenterology The Air Force Medical CenterBeijing 100142China Department of Blood Transfusion Air Force Medical CenterBeijing 100142China

BACKGROUND Simulated microgravity environment can lead to gastrointestinal motility *** pathogenesis of gastrointestinal motility disorders is closely related to the stem cell factor(SCF)/c-kit signaling pathway associated with intestinal flora and Cajal stromal ***,intestinal flora can also affect the regulation of SCF/c-kit signaling pathway,thus affecting the expression of Cajal stromal *** cells are the pacemakers of gastrointestinal *** To investigate the effects of Bifidobacterium lactis(***)BLa80 on the intestinal flora of rats in simulated microgravity and on the gastrointestinal motility-related SCF/c-kit *** The internationally recognized tail suspension animal model was used to simulate the microgravity environment,and 30 rats were randomly divided into control group,tail suspension group and drug administration tail suspension group with 10 rats in each group for a total of 28 *** tail group was given *** BLa80 by intragastric administration,and the other two groups were given water intragastric administration,the concentration of intragastric administration was 0.1 g/mL,and each rat was 1 mL/***&eosin staining was used to observe the histopathological changes in each segment of the intestine of each group,and the expression levels of SCF,c-kit,extracellular signal-regulated kinase(ERK)and p-ERK in the gastric antrum of each group were detected by Western blotting and *** fecal flora and mucosal flora of rats in each group were detected by 16S *** Simulated microgravity resulted in severe exfoliation of villi of duodenum,jejunum and ileum in rats,marked damage,increased space between villi,loose arrangement,shortened columnar epithelium of colon,less folds,narrower mucosal thickness,reduced goblet cell number and crypts,and significant improvement after probiotic *** microgravity reduced the expressions of SCF and c-kit,and increased the express

关键词： Simulated microgravity Rat Intestinal flora Gastrointestinal motility Stem cell factor/c-kit signaling pathway

PI3K/AKT signaling and neuroprotection in ischemic stroke:molecular mechanisms and therapeutic perspectives

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Neural Regeneration Research 2025年第10期20卷 2758-2775页

作者： Tianlong Liu Xiaolin Li Xiaowei Zhou Wei chen Aidong wen Minna Liu Yi Ding Department of Pharmacy Xijing HospitalFourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Pharmacy The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina Department of Pharmacy The 944 Hospital of Joint Logistics Support Forces of Chinese PLAJiuquanGansu ProvinceChina Department of Nephrology The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina

It has been reported that the PI3K/AKT signaling pathway plays a key role in the pathogenesis of ischemic *** a result,the development of drugs targeting the PI3K/AKT signaling pathway has attracted increasing attention from *** article reviews the pathological mechanisms and advancements in research related to the signaling pathways in ischemic stroke,with a focus on the PI3K/AKT signaling *** key findings include the following:(1)The complex pathological mechanisms of ischemic stroke can be categorized into five major types:excitatory amino acid toxicity,Ca^(2+)overload,inflammatory response,oxidative stress,and apoptosis.(2)The PI3K/AKT-mediated signaling pathway is closely associated with the occurrence and progression of ischemic stroke,which primarily involves the NF-κB,NRF2,BCL-2,mTOR,and endothelial NOS signaling pathways.(3)Natural products,including flavonoids,quinones,alkaloids,phenylpropanoids,phenols,terpenoids,and iridoids,show great potential as candidate substances for the development of innovative anti-stroke medications.(4)Recently,novel therapeutic techniques,such as electroacupuncture and mesenchymal stem cell therapy,have demonstrated the potential to improve stroke outcomes by activating the PI3K/AKT signaling pathway,providing new possibilities for the treatment and rehabilitation of patients with ischemic *** investigations should focus on the direct regulatory mechanisms of drugs targeting the PI3K/AKT signaling pathway and their clinical translation to develop innovative treatment strategies for ischemic stroke.

关键词： apoptosis autophagy inflammation ischemic stroke neuroprotection oxidative stress pathogenesis phosphatidylinositol 3-kinase protein kinase B therapeutics

Cortico-striatal gamma oscillations are modulated by dopamine D3 receptors in dyskinetic rats

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Neural Regeneration Research 2025年第4期20卷 1164-1177页

作者： Pengfei Wang Yuewei Bi Min Li Jiazhi chen Zhuyong Wang Huantao wen Ming Zhou Minjie Luo Wangming Zhang Neurosurgery Center Department of Pediatric NeurosurgeryGuangdong Provincial Key Laboratory on Brain Function Repair and RegenerationZhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

Long-term levodopa administration can lead to the development of levodopa-induced *** oscillations are a widely recognized hallmark of abnormal neural electrical activity in levodopa-induced ***,studies have reported increased oscillation power in cases of levodopa-induced ***,little is known about how the other electrophysiological parameters of gamma oscillations are altered in levodopa-induced ***,the role of the dopamine D3 receptor,which is implicated in levodopa-induced dyskinesia,in movement disorder-related changes in neural oscillations is *** found that the cortico-striatal functional connectivity of beta oscillations was enhanced in a model of Parkinson’s ***,levodopa application enhanced cortical gamma oscillations in cortico-striatal projections and cortical gamma aperiodic components,as well as bidirectional primary motor cortex(M1)↔dorsolateral striatum gamma *** of PD128907(a selective dopamine D3 receptor agonist)induced dyskinesia and excessive gamma oscillations with a bidirectional M1↔dorsolateral striatum ***,administration of PG01037(a selective dopamine D3 receptor antagonist)attenuated dyskinesia,suppressed gamma oscillations and cortical gamma aperiodic components,and decreased gamma causality in the M1→dorsolateral striatum *** findings suggest that the dopamine D3 receptor plays a role in dyskinesia-related oscillatory activity,and that it has potential as a therapeutic target for levodopa-induced dyskinesia.

关键词： aperiodic components dopamine D3 receptor dorsolateral striatum functional connectivity gamma oscillations levodopa-induced-dyskinesia local field potentials neuromodulation Parkinson’s disease primary motor cortex

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胶原多肽螯合钙的研究进展

食品安全质量检测学报 2016年第8期7卷 3222-3227页

作者：张志胜韩晴齐文聪陈晨戎平河北农业大学食品科技学院保定071000

目前我国居民钙摄入量不足,普遍存在缺钙现象,传统的补钙制剂存在缺陷,将逐步被新型钙制剂所取代。胶原多肽螯合钙作为新型生物钙制剂,具有吸收效率高、无副作用、服用方便等特点,是一种良好的补钙产品。近些年来,许多学者研究胶原多肽... 详细信息

目前我国居民钙摄入量不足,普遍存在缺钙现象,传统的补钙制剂存在缺陷,将逐步被新型钙制剂所取代。胶原多肽螯合钙作为新型生物钙制剂,具有吸收效率高、无副作用、服用方便等特点,是一种良好的补钙产品。近些年来,许多学者研究胶原多肽螯合钙,为补钙产品提供了新思路。胶原多肽作为其原料的一部分,与钙螯合后可以帮助钙的转运和吸收,被一起摄入后兼补了两种营养素。从一些动物加工的副产物中可以提取胶原多肽和钙,利用他们为原料制备胶原多肽螯合钙有利于副产物的高值化,也为副产物的利用提供了新途径。本文主要对胶原多肽螯合钙的原料制备、螯合工艺、螯合效果的影响因素、发展前景进行了概述。

关键词：胶原多肽螯合钙原料制备工艺

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鳕鱼皮胶原蛋白的提取与应用

食品安全质量检测学报 2016年第8期7卷 3228-3233页

作者：张志胜齐文聪韩晴陈晨戎平河北农业大学食品科技学院保定071000

鳕鱼加工过程中鱼皮约占鳕鱼总重量的十分之一,其富含丰富的胶原蛋白。胶原蛋白具有支撑机体器官、保护组织等功能,同时也是组成细胞间质的重要功能蛋白质。从鳕鱼皮中提取胶原蛋白,不仅避免资源浪费,同时也减少环境污染。本文总结了近... 详细信息

鳕鱼加工过程中鱼皮约占鳕鱼总重量的十分之一,其富含丰富的胶原蛋白。胶原蛋白具有支撑机体器官、保护组织等功能,同时也是组成细胞间质的重要功能蛋白质。从鳕鱼皮中提取胶原蛋白,不仅避免资源浪费,同时也减少环境污染。本文总结了近几年从鳕鱼皮中提取胶原蛋白常见的方法:热水法、碱法、盐法和酶法,并分析了各方法的特点。热水提取法破坏胶原蛋白结构使其隔膜作用、稳定作用及协助传输等作用减少;碱法提取由于产生消旋混合物,故较少使用此方法;盐法提取所得产物缺乏稳定性,不宜大规模生产;酶法提取成本低、效率高,使用广泛。由于胶原蛋白具有独特的三重螺旋结构、低免疫原性、生产成本低、可大规模生产和优良的生物降解性等优点,使得其在医药、食品、化妆品等领域应用广泛,具有极大的发展前景。

关键词：鳕鱼皮胶原蛋白提取方法应用