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Special epithelioid trophoblastic tumor:A case report

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World Journal of Clinical Cases 2022年第26期10卷 9354-9360页

作者： ya-Nan Wang yan Dong Lin Wang ya-hui chen Hai-yang Hu Jing Guo Lin Sun Departments of Clinical Jining Medical UniversityJining 272000Shandong ProvinceChina Department of Gynecology Affiliated Hospital of Jining Medical UniversityJining 272000Shandong ProvinceChina Department of Pathology Affiliated Hospital of Jining Medical UniversityJining 272000Shandong ProvinceChina

BACKGROUND Epithelioid trophoblastic tumor(ETT)is a special type of gestational trophoblastic ***,its pathogenesis has been incompletely *** rarely occurs in the ovaries and fallopian tubes,unlike placental site trophoblastic tumor,requiring a histopathological biopsy and immunohistochemistry for further *** SUMMARY A 29-year-old woman with irregular vaginal bleeding and elevated serum chorionic gonadotropin(β-hCG)levels presented similar symptoms to ectopic *** ultrasound revealed abnormal echoes of the left ***,the pathology of the left ovary and fallopian tube was reported as *** patient was followed up with regular hCG measurements and *** blood hCG values showed an upward trend 3 mo after the operation and then chemotherapy was *** current health status is *** For women of childbearing age with elevated serumβ-hCG levels,practitioners should consider ETT and be alert to the poor prognosis of the *** surgery,the patient’s condition should be closely observed to prevent recurrence and *** chemotherapy is only helpful for treating the disease to a certain extent.

关键词： Trophoblastic tumor Epithelioid trophoblastic tumor Serum chorionic gonadotropin Vaginal bleeding The partial hydatidiform mole Choriocarcinoma Case report

Chain Dynamics Heterogeneity in Plasticized Poly(vinyl butyral)(PVB) as Elucidated by Solid-State NMR

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Chinese Journal of Polymer Science 2024年第1期42卷 113-124,I0010页

作者： Jing Lv Xu chen Zi-Shuo Wu ya-hui Li Wei chen National Synchrotron Radiation Laboratory Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmCAS Key Laboratory of Soft Matter ChemistryUniversity of Scienceand Technology of ChinaHefei 230026China

The chain dynamics heterogeneity of the poly(vinyl butyral)(PVB) plasticized by triethylene glycol bis(2-ethylhexa noate)(TEG-EH) was investigated by various solid-state NMR *** plasticized PVB shows two domains in distinct molecular dynamics differences,namely,rigid and soft domains,where the latter is the plasticizer-rich *** time domain low field NMR was first used to investigate the dynamics heterogeneity of the plasticized PVB,and the results show the decreasing activated energy of components in the soft domain of plasticized PVB(E_a=20.2 kJ/mol) as compared with that of the pristine one(E_a=24.3 kJ/mol).Detailed dynamics heterogeneity was obtained by high-field NMR with site-specific *** quadrupole-echo ~2H-NMR was adopted to elucidate the dynamics heterogeneity of the vinyl alcohol(VA) units,where only the hydroxyl group of VA is *** ~1H-^(13)C WISE NMR spectra show that there is not much difference in the mobility of the VB unit in PVB with and without plasticizer,whereas the glass transition temperature differed by approximately 53℃.This is further supported by Torchia's T_1 relaxation *** origin of such an unusual phenomenon is attributed to the critical role of the remaining VA(~22%) in the soft domain,where the VA units locally aggregate through hydrogen ***,the existence of a mobility gradient in the VB unit has been ***,the mobility difference for VB with different stereo-geometry(meso or racemic conformation) is observed for the first *** indicates the importance of modulating the ratio of meso over racemic VB for controlling the macroscopic perfo rmance of PVB.

关键词： Poly(vinyl butyral) Dynamics heterogeneity Plasticizer Solid state NMR

Event patterns from negative pion spectra in proton-proton and nucleus-nucleus collisions at SPS

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Chinese Physics C 2018年第10期42卷 103-118页

作者： ya-hui chen Fu-Hu Liu Edward K.Sarkisyan-Grinbaum Institute of Theoretical Physics ＆ State Key Laboratory of Quantum Optics and Quantum Optics Devices Shanxi University TaiyuanShanxi 030006China Experimental Physics Department CERN1211 Geneva 23Switzerland Department of Physics The University of Texas at ArlingtonArlingtonTX 76019USA

Rapidity-dependent transverse momentum spectra of negatively charged pions measured at different rapidities in proton-proton collisions at the Super Proton Synchrotron （SPS） at various energies within its Beam Energy Scan （BES） program are investigated by using one- and two-component standard distributions where the chemical potential and spin property of particles are implemented. The rapidity spectra are described by a double- Gaussian distribution. At the stage of kinetic freeze-out, the event patterns are structured by the scatter plots in the three-dimensional subspaces of velocity, momentum and rapidity. The results of the studies of the rapidityindependent transverse mass spectra measured at mid-rapidity in proton-proton collisions are compared with those based on the similar transverse mass spectra measured in the most central beryllium-beryllium, argon-scandium and lead-lead collisions from the SPS at its BES energies.

关键词： rapidity-dependent transverse momentum spectra fine event patterns three-dimensional space

The primary controlling parameters of porosity, permeability,and seepage capability of tight gas reservoirs:a case study on Upper Paleozoic Formation in the eastern Ordos Basin,Northern China

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Petroleum Science 2019年第6期16卷 1270-1284页

作者： Hong-Jun Qu Bo yang Xia-He Tian Xin-She Liu Huan yang Wen-Wu Dong ya-hui chen State Key Laboratory of Continental Dynamics Department of GeologyNorthwest UniversityXi’an 710069ShaanxiChina Changqing Oilfi eld Company PetroChinaXi’an 710018ShaanxiChina

Tight sandstone gas(hereafter"tight gas")has become a subject of unconventional gas exploration *** large-scale development and use of tight gas resources in the USA,in particular,facilitated the rapid rebound of natural gas production in the USA,in addition to driving the rapid development of tight gas *** the eastern Ordos Basin,the Upper Paleozoic feature includes multiple layers of gas,a shallow depth,and notable potential for exploration and ***,the reservoirs in the area are relatively tight,exhibit strong heterogeneity,and possess a complex micropore structure,thus restricting the eff ective economic development of oil and ***,research on the primary parameters controlling pore throat structure and the seepage capability of low-permeability reservoirs will be beneficial for the effcient exploration and development of natural gas in the eastern Ordos *** parameters of reservoir porosity and percolation ability,as well as permeability,were analyzed using systematic sampling of the of the Upper Paleozoic Benxi,Taiyuan,and Shanxi Formations in the eastern Ordos Basin,constant-rate mercury injection experiments,nuclear magnetic resonance analysis,and gas–water-phase experimental *** results indicate that reservoir porosity is controlled by the effective pore volume and number,whereas permeability is controlled by the largest throat radius,rather than the *** effective pore volume controls the movable fluid saturation,while reservoir percolation capability is controlled by the effective pore volume,irreducible water saturation,and size of the gas–water two-phase seepage zone.

关键词： Porosity and permeability Largest throat radius Movable fluid saturation Effective pore throat volume The range of gas–water two-phase seepage zone

Enhancing reversible hydrogen storage performance of 2LiBH_(4)–MgH_(2)via in-situ building heterogeneous nucleation sites

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Rare Metals 2024年第9期43卷 4367-4376页

作者： Wei chen ya-hui Sun Tian Xu Xue-Bin Yu Guang-Lin Xia Department of Materials Science Fudan UniversityShanghai 200433China

2LiBH_(4)-MgH_(2)composite is one of the most attractive reactive hydride composites with a theoretic hydrogen capacity of 10.8 wt%.However,the large nucleation restriction of MgB_(2)during the second step of dehydrogenation results in sluggish hydrogen storage kinetics and high operating temperature,which hinders its practical application as on-board hydrogen storage ***,Al3Ti doped Al nanoparticles(AT NPs)are prepared by a facile chemical reduction reaction to improve the hydrogen storage performance of 2LiBH_(4)-MgH_(2)*** the initial H_(2)desorption process,MgAlB_(4)and TiB_(2)that have identical crystal structure and low d-value mismatch with MgB_(2)resulting from the reaction between AT NPs and 2LiBH_(4)-MgH_(2)composite serve as effective nucleation sites for the formation of MgB_(2).As a result,the apparent activation energy of the two-step H_(2)desorption of AT NPs doped 2LiBH_(4)-MgH_(2)composite are notably decreased to(110.0±5.9)and(119.6±1.4)kJ·mol^(-1),which is 55.5 and 33.5 kJ·mol^(-1)lower than that of the undoped *** importantly,a reversible hydrogen storage capacity of 9.2 wt%after 10cycles of H_(2)desorption and adsorption could be achieved,corresponding to a capacity retention rate of 99%.The building of reactive bimetallic catalyst towards in situ formation of heterogeneous nucleation sites provides a new strategy for improving the hydrogen storage performance of reactive hydride composites.

关键词： Reversible hydrogen storage Reactive hydride composites Catalytic effects Heterogeneous nucleation

Retinitis pigmentosa and stem cell therapy

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International Journal of Ophthalmology(English edition) 2024年第7期17卷 1363-1369页

作者： Xin-ya Qi chen-hui Mi De-Rui Cao Xie-Qun chen Peng Zhang School of Medicine Department of Life Sciences and MedicineNorthwest UniversityXi’an 710069Shaanxi ProvinceChina The Third Hospital of Xi’an Affiliated Hospital of Northwest UniversityXi’an 710021Shaanxi ProvinceChina

Retinitis pigmentosa(RP)is a group of genetic disorders characterized by progressive degeneration of photoreceptors and retinal pigment epithelium(RPE)*** main clinical manifestations include night blindness and progressive loss of peripheral vision,making it a prevalent debilitating eye disease that significantly impacts patients’quality of *** exhibits significant phenotypic and genetic *** instance,numerous abnormal genes are implicated in RP,resulting in varying clinical presentations,disease progression rates,and pathological characteristics among different ***,gene therapy for RP poses challenges due to these ***,stem cells have garnered considerable attention in the field of RPE therapy since both RPE cells and photoreceptors can be derived from stem *** recent years,a large number of animal experiments and clinical trials based on stem cell transplantation attempts,especially cord blood mesenchymal stem cell(MSC)transplantation and bone marrow-derived MSC transplantation,have confirmed that stem cell therapy can effectively and safely improve the outer retinal function of the RP-affected ***,stem cell therapy also has certain limitations,such as the fact that RP patients may involve multiple types of retinal cytopathia,which brings great challenges to stem cell transplantation therapy,and further research is needed to solve various problems faced by this approach in the *** comprehensive analysis of the etiology and histopathological changes associated with RP,this study substantiates the efficacy and safety of stem cell therapy based on rigorous animal experimentation and clinical trials,while also highlighting the existing limitations that warrant further investigation.

关键词： retinitis pigmentosa photoreceptor stem cell therapy

Hierarchically Macroporous Zeolite ZSM-5 Microspheres for Efficient Catalysis

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Chemical Research in Chinese Universities 2024年第4期40卷 704-711页

作者： ZHENG Mingdan chen ya LIU Zhan LYU Jiamin YE Bo SUN Ming-hui chen Li-Hua SU Bao-Lian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070P.R.China Laboratory of Inorganic Materials Chemistry(CMI) University of Namur5000NamurWalloniaBelgium

Hollow zeolite microspheres have recently attracted much attention for their applications in catalysis,microreactors and ***,we present hierarchically structured zeolite ZSM-5 microspheres with unique,abundant macropores that allow more efficient use for *** hierarchically macroporous zeolite ZSM-5 microspheres are synthesized under the assistance of water/oil emulsions and using polystyrene nanospheres as *** zeolite microsphere is assembled by uniform hollow zeolite *** large inner cavities and thin zeolite shells lead to smaller diffusion channel and higher improved accessibility to active sites,contributing to high catalytic performance in the catalytic conversion of benzyl alcohol in *** novel zeolite microspheres with impressive performance will be applied to numerous other industrial catalytic reactions.

关键词： Hierarchically porous structure Hollow structure Microsphere Zeolite ZSM-5 Alkylation

Ground state of Rydberg-dressed Bose gas confined in a toroidal trap

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Communications in Theoretical Physics 2024年第1期76卷 29-35页

作者： Lin-Xue Wang Hong-Li yang hui Liu Si-Lin chen ya-Jun Wang Xiao-Fei Zhang Department of Physics School of Physics and Information ScienceShaanxi University of Science and TechnologyXi'an 710021China Department of Basic Sciences Air Force Engineering UniversityXi'an 710051China

The experimental realization of Rydberg dressing technology in ultracold atomic systems provides another superior platform for studying novel states of matter and macroscopic quantum *** this work,based on the mean-field theory,we have investigated the ground-state phases of a two-component Bose–Einstein condensate with Rydberg interaction and confined in a toroidal *** effects of the Rydberg interaction and external potential,especially the Rydberg blockade radius,on the ground-state structure of such a system have been investigated in full parameter *** results show that the Rydberg blockade radius,which can be regarded as another controllable parameter,can be used to obtain a variety of ground-state *** interestingly,it is found that for weak Rydberg interactions,the Rydberg blockade radius breaks the spontaneous rotational symmetry of the system,leading to the formation of a discrete unit cell *** strongly interacting cases,it can be used to realize different orders of discrete rotational symmetry breaking.

关键词： Bose-Einstein condensate Rydberg dressing toroidal trap

Research progress in CALPHAD assisted metal additive manufacturing

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China Foundry 2024年第4期21卷 295-310页

作者： ya-qing Hou Xiao-qun Li Wei-dong Cai Qing chen Wei-ce Gao Du-peng He Xue-hui chen Hang Su China Iron&Steel Research Institute Group Beijing 100081China Thermo-Calc Software AB SolnaSE-169Sweden KTH Royal Institute of Technology StockholmSE-100Sweden Central Iron and Steel Research Institute Beijing 100081China

Metal additive manufacturing(MAM)technology has experienced rapid development in recent *** both equipment and materials progress towards increased maturity and commercialization,material metallurgy technology based on high energy sources has become a key factor influencing the future development of *** calculation of phase diagrams(CALPHAD)is an essential method and tool for constructing multi-component phase diagrams by employing experimental phase diagrams and Gibbs free energy models of simple *** combining with the element mobility data and non-equilibrium phase transition model,it has been widely used in the analysis of traditional metal *** development of CALPHAD application technology for MAM is focused on the compositional design of printable materials,the reduction of metallurgical imperfections,and the control of microstructural *** endeavor carries considerable theoretical and practical *** paper summarizes the important achievements of CALPHAD in additive manufacturing(AM)technology in recent years,including material design,process parameter optimization,microstructure evolution simulation,and properties ***,the limitations of applying CALPHAD technology to MAM technology are discussed,along with prospective research directions.

关键词： metal additive manufacturing CALPHAD integrated computational material engineering powder bed fusion material design microstructure simulation