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Separation of the ionospheric and thermospheric contributions in the data from the Triple Ionosophere Photo Meter onboard the Feng-Yun 3E satellite

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Science China Earth Sciences 2025年第1期68卷 172-184页

作者： fang jiang Tian MAO Jin-Song WANG Xiu-Qing HU Xiao-Xin ZHANG Liping FU Nan JIA Tianfang WANG National Space Science Center Chinese Academy of Sciences Beijing Key Laboratory of Space Environment Exploration Key Laboratory of Environmental Space Situation Awareness Technology National Satellite Meteorological Center China Meteorological Administration

The Triple Ionosphere Photo Meter （TRIPM） is a far ultraviolet nadir-view photometer that is onboard the secondgeneration,polar-orbiting Chinese meteorological satellite Feng-Yun 3E （FY-3E）,which was launched on July 5,*** has three channels,and each is used to measure different types of emissions:（1） 135.6 nm airglow produced by the recombination of the O+ions and electrons in the absence of sunlight （nighttime channel）;（2） 135.6 nm airglow from the OI when sunlight is present （daytime/dusk-dawn 135.6 nm channel）;and （3） Airglow in the N2LBH of the TRIPM （daytime/dusk-dawn N2LBH channel）.FY-3E is a satellite operating in the early morning ***,the data are mostly distributed on the dawndusk side or at times when the solar zenith angle is relatively *** this study,combined with simulation calculations,the data are *** further explore the application value of the data products,a model is used to separate the ionospheric radiative recombination contribution from the thermosphere photoelectron impact excitation contribution in the data from the daytime/dusk-dawn 135.6 nm *** approach not only improves the accuracy of O/N2derived from the 135.6 nm channel and N2LBH channel but also provides the ionospheric 135.6 nm radiance at the same time as the *** results show that the 135.6 nm radiance originating from the combination of O+and electrons extracted from the measurement data exhibits similar equatorial anomaly peak structure characteristics and seasonal variations as the corresponding GPS total electron content （TEC） *** the other hand,the separated 135.6 nm radiance generated from the thermosphere photoelectron collision excitation does not contain radiative recombination contributions;thus,the ionosphere influence is greatly avoided when the O/N2is obtained.

关键词： Far ultraviolet 135.6 nm emission intensity Photoelectron impact excitation Radiative recombination excitation

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CVD Method for Carbon Nanotubes Preparation Based on Orthogonal Experiment Using C_3H_6

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Journal of Wuhan University of Technology(Materials Science) 2015年第5期30卷 959-964页

作者：苏勋文 jiang fang School of Technology Beijing Forestry University

Carbon nanotubes (CNTs) have potential applications in many fields, chemical vapor deposition (CVD) is an effective method for CNTs preparation. By CVD, the catalytic pyrolysis temperature, pyrolysis time and the size of the raw gas flow have a great influence on yield rate of CNTs and their form. In this paper, the orthogonal experiment analysis method is used for studying the influence factors of yield rate of CNTs. Research results show that, in the suitable temperature range of preparing CNTs, there is relatively more CNTs with excellent morphology, otherwise, if the temperature is too low, the growth of CNTs will not be sufficient; if the temperature is too high, then CNTs will be generated with excessive defects; with longer growth time of suitable pyrolysis of CNTs, higher yield of CNTs will be obtained; CNTs morphology with reaction time is not proportional; too low or too high raw gas flow rate is not conducive to the growth of CNTs. We have found the optimum conditions for the CNTs preparation: pyrolysis temperature 68 degrees C, pyrolysis time 35 min, propylene flow rate of 180 mL/min. The results have a reference value for the preparation of CNTS and their composites.

关键词： CNTs method of CVD synthesis orthogonal experiment

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Human pluripotent stem cell-derivedβcells:Truly immature isletβcells for type 1 diabetes therapy?

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World Journal of Stem Cells 2023年第4期15卷 182-195页

作者： Helen jiang fang-Xu jiang Sir Charles Gairdner Hospital University of Western AustraliaPerth 6009Australia School of Biomedical Sciences University of Western AustraliaPerth 6009Australia School of Health and Medical Sciences Edith Cowan UniversityPerth 6027Australia

A century has passed since the Nobel Prize winning discovery of insulin,which still remains the mainstay treatment for type 1 diabetes mellitus(T1DM)to this *** to the words of its discoverer Sir Frederick Banting,“insulin is not a cure for diabetes,it is a treatment”,millions of people with T1DM are dependent on daily insulin medications for *** donor islet transplantation has proven that T1DM is curable,however due to profound shortages of donor islets,it is not a mainstream treatment option for *** pluripotent stem cell derived insulin-secreting cells,pervasively known as stem cell-derivedβcells(SC-βcells),are a promising alternative source and have the potential to become a T1DM treatment through cell replacement *** we briefly review how isletβcells develop and mature in vivo and several types of reported SC-βcells produced using different ex vivo protocols in the last *** some markers of maturation were expressed and glucose stimulated insulin secretion was shown,the SC-βcells have not been directly compared to their in vivo counterparts,generally have limited glucose response,and are not yet fully *** to the presence of extra-pancreatic insulin-expressing cells,and ethical and technological issues,further clarification of the true nature of these SC-βcells is required.

关键词： Human pluripotent stem cells Stem cell-derivedβcells Isletβcells Type 1 diabetes mellitus Cell replacement therapy

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Dysfunction of two lysosome degradation pathways of α-synuclein in Parkinson's disease: potential therapeutic targets?

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Neuroscience Bulletin 2012年第5期28卷 649-657页

作者： Tian-fang jiang Sheng-Di Chen Department of Neurology & Institute of Neurology Ruijin Hospital affiliated to Shanghai Jiao Tong University School of Medicine Shanghai 200025 China

Parkinson＇s disease （PD） is pathologically characterized by the presence of α-synuclein （α-syn）-positive intra-cytoplasmic inclusions named Lewy bodies in the dopaminergic neurons of the substantia nigra. A series of morbid consequences are caused by pathologically high amounts or mutant forms of α-syn, such as defects of membrane trafficking and lipid metabolism. In this review, we consider evidence that both point mutation and overexpression of α-syn result in aberrant degradation in neurons and microglia, and this is associated with the autophagy-lysosome pathway and endosome-lysosome system, leading directly to pathological intracellular aggregation, abnormal externalization and re-internalization cycling （and, in turn, internalization and re-externalization）, and exocytosis. Based on these pathological changes, an increasing number of researchers have focused on these new therapeutic targets, aiming at alleviating the pathological accumulation of α-syn and re-establishing normal degradation.

关键词： Parkinson’s disease α-synuclein neurodegenerative disease

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Polyfluorene based conjugated polymer nanoparticles for two-photon live cell imaging

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Science China Chemistry 2018年第1期61卷 88-96页

作者： Shuang Li Xiao-fang jiang Qing-Hua Xu Institute of Polymer optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and Devices South China University of Technology Guangzhou 510640 China National University of Singapore (Suzhou) Research Institute Suzhou 215123 China Department of Chemistry National University of Singapore Singapore 117543 Singapore

Two-photon excitation microscopy(2 PEM) has been known as a noninvasive and powerful bio-imaging tool for studying living cells, intact tissues and living animals because of their unique advantages such as localized excitation, deep tissue penetration as well as less photo-damage. However, the major limitations that hinder its practical applications in biological systems are low two-photon absorption cross sections of conventional fluorescence probes. Conjugated polymer nanoparticles(CPNs) consisting of highly fluorescent conjugated polymers are promising fluorescent probes for 2 PEM due to their unique advantages including large two-photon absorption cross sections, high fluorescence quantum yield, good photo-stability and biocompatibility, facile chemical synthesis, tunable optical properties as well as versatile surface modifications. This account summarizes the recent efforts of our group on development of novel polyfluorene based CPNs as 2 PEM contrast agents for live cell imaging.

关键词： conjugated polymers nanoparticles two-photon absorption fluorescence microscopy bio-imaging

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Studying the Fermi GeV light curve of Vela with the two-pole caustic model

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Research in Astronomy and Astrophysics 2009年第12期9卷 1324-1330页

作者： Huan Yu Jun fang Ze-Jun jiang Department of Physics Yunnan University Kunming 650091 China

An observation of the Vela pulsar with the Fermi Large Area Telescope has been recently reported and the GeV light curve shows two main peaks with a phase separation of ～0.43. We study the GeV light curve using the two-pole caustic model in which the peaks of the light curves of the pulsar result from caustic effects. The results show that the two-pole caustic model can reproduce the observed emission pattern of the two peaks and the bridge emission between them well, but overestimates the flux outside the two peaks. After taking account of the pair production effect on the azimuthal angle, we find that the resulting light curve is more consistent with the observation. We excluded the emissions from the field lines for which the distance from the null charge surface, where the pairs can be significantly produced, is larger than the radius of the light cylinder.

关键词： gamma rays: theory -- pulsars: individual (PSR B0833-45)

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Surface photometry and radial color gradients of nearby luminous early-type galaxies in SDSS Stripe 82

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Research in Astronomy and Astrophysics 2011年第3期11卷 309-326页

作者： fang-Zhou jiang Song Huang Qiu-Sheng Gu Department for Intensive Instruction Kuang Yaming Honors School Nanjing University Nanjing 210093 China Department of Astronomy Nanjing University Nanjing 210093 China

We make use of the images from the Sloan Digital Sky Survey Stripe 82（Stripe 82） to present an analysis of r band surface brightness profiles and radial color gradients（g-r,u-r） in our sample of 111 nearby early-type galaxies（ETGs） .Thanks to the Stripe 82 images,each of which is co-added from about 50 single frames,we are able to pay special attention to the low-surface-brightness areas（LSB areas） of the *** LSB areas affect the Sérsic fittings and concentration indices by making both of the indices less than the typical values for *** the Sérsic fits to all the surface brightness profiles,we found some Sérsic indices that range from 1.5 to 2.5,much smaller than those of typical de Vaucouleur profiles and relatively close to those of exponential disks,and some others much larger than four but still with accurate *** galaxies cannot be fitted with a single Sérsic profile,but once we try double Sérsic profiles,the fittings are improved：one with a profile relatively close to the de Vaucouleur law in the inner area and a profile relatively close to an exponential law in the LSB area,the other with a nice fitting in the inner area but still having a failed fitting in the outer *** 60%of the sample has negative color gradients（red-core） within 1.5Re,much more than the approximately 10%positive ones（blue-core） within the same ***,taking into account the LSB areas,we find that the color gradients are not necessarily monotonic：about one third of the red-core（or blue-core） galaxies have positive（or negative） color gradients in the outer areas. So LSB areas not only make ETGs’Sérsic profiles deviate from de Vaucouleur ones and shift to the disk end,but also reveal that quite a number of ETGs have opposite color gradients in inner and outer *** outcomes remind us of the necessity of double-Sérsic *** LSB phenomena may be interpreted by mergers and thus have different metallicity in the outer *** parameters ar

关键词： galaxies:early-type galaxies—galaxies:surface brightness profiles and color gradients—techniques:photometric

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Multipotent pancreas progenitors: Inconclusive but pivotal topic

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World Journal of Stem Cells 2015年第11期7卷 1251-1261页

作者： fang-Xu jiang Grant Morahan Islet Cell Development Program Harry Perkins Institute of Medical Research Centre for Medical Research the University of Western Australia Centre for Diabetes Research Harry Perkins Institute of Medical Research

The establishment of multipotent pancreas progenitors(MPP) should have a significant impact not only on the ontology of the pancreas, but also for the translational research of glucose-responding endocrine b-cells. Deficiency of the latter may lead to the pandemic type 1 or type 2 diabetes mellitus, a metabolic disorder. An ideal treatment of which would potentially be the replacement of destroyed or failed b-cells, by restoring function of endogenous pancreatic endocrine cells or by transplantation of donor islets or in vitro generated insulin-secreting cells. Thus, considerable research efforts have been devoted to identify MPP candidates in the preand post-natal pancreas for the endogenous neogenesis or regeneration of endocrine insulin-secreting cells. In order to advance this inconclusive but critical field, we here review the emerging concepts, recent literature and newest developments of potential MPP and propose measures that would assist its forward progression.

关键词： Multipotent pancreas progenitors Regeneration Self-renewal Clonogenesis Differentiation

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Perturbation to Noether-Lie Symmetry and Adiabatic Invariants for Mechanical Systems in Phase Space

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Communications in Theoretical Physics 2008年第8期50卷 326-330页

作者： ZHANG Ming-jiang fang Jian-Hui LU Kai College of Physics Science and Technology China University of Petroleum Dongying 257061 China

Based on the concept of adiabatic invariant,the perturbation to Noether-Lie symmetry and adiabatic invariants for mechanical systems in phase space are *** criterion of the Noether-Lie symmetry for the perturbed system is given,and the definition of the perturbation to Noether-Lie symmetry for the system under the action of small disturbance is ***,the Noether adiabatic invariants and the generalized Hojman adiabatic invariants of the perturbed system are obtained.

关键词： Noether Lie symmetry perturbation adiabatic invariant mechanical system phase space

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Perturbation to Noether-Mei Symmetry and Adiabatic Invariants for Nonholonomic Mechanical Systems in Phase Space

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Communications in Theoretical Physics 2009年第4期51卷 600-604页

作者： ZHANG Ming-jiang fang Jian-Hui LU Kai College of Physics Science and Technology China University of Petroleum Dongying 257061 China

Based on the concept of adiabatic invariant, the perturbation to Noether Mei symmetry and adiabatic invariants for nonholonomie mechanical systems in phase space are studied. The definition of the perturbation to Noether-Mei symmetry for the system is presented, and the criterion of the perturbation to Noether-Mei symmetry is given. Meanwhile, the Noether adiabatic invariants and the Mei adiabatic invariants for the perturbed system are obtained.

关键词： Noether-Mei symmetry perturbation adiabatic invariant nonholonomic mechanical system phase space

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