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An emerging terpolymeric nanoparticle pore former as an internal recrystallization inhibitor of celecoxib in controlled release amorphous solid dispersion beads:Experimental studies and molecular dynamics analysis

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Acta Pharmaceutica Sinica B 2024年第6期14卷 2669-2684页

作者： Jamie Anne Lugtu-Pe Xuning Zhang Sako Mirzaie Hao Han R.Chang Nour AL-Mousawi Kuan Chen Yongqiang Li Anil Kane daniel bar-shalom.xiao yu wu Advanced Pharmaceutics and Drug Delivery Laboratory Leslie Dan Faculty of PharmacyUniversity of TorontoToronto M5S 3M2Canada Candoo Pharmatech Company Inc. Mississauga L5N 5M1Canada Department of Pharmacy University of CopenhagenCopenhagen DK-2100Denmark Patheon by Thermo Fisher Scientific Toronto Region Operations(TRO)Mississauga L5N 3X4Canada

Solid oral controlled release formulations feature numerous clinical advantages for drug candidates with adequate solubility and dissolution ***,most new chemical entities exhibit poor water solubility,and hence are exempt from such *** combining drug amorphization with controlled release formulation is promising to elevate drug solubility,like other supersaturating systems,the problem of drug recrystallization has yet to be resolved,particularly within the dosage ***,we explored the potential of an emerging,non-leachable terpolymer nanoparticle(TPN)pore former as an internal recrystallization inhibitor within controlled release amorphous solid dispersion(CRASD)beads comprising a poorly soluble drug(celecoxib)reservoir and insoluble polymer(ethylcellulose)*** to conventional pore former,polyvinylpyrrolidone(PVP),TPN-containing membranes exhibited superior structural integrity,less crystal formation at the CRASD bead surface,and greater extent of celecoxib ***-atom molecular dynamics analyses revealed that in the presence of TPN,intra-molecular bonding,crystal formation tendency,diffusion coefficient,and molecular flexibility of celecoxib were reduced,while intermolecular H-bonding was increased as compared to *** work suggests that selection of a pore former that promotes prolonged molecular separation within a nanoporous controlled release membrane structure may serve as an effective strategy to enhance amorphicity preservation inside CRASD.

关键词： Controlled release amorphous solid dispersion Poorly soluble drug Internal recrystallization Membrane-reservoir coated beads Molecular dynamics simulation Effect of pore formers Terpolymer nanogel Drug-polymer interactions

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后处理厂红油可能组分丁醇及其衍生物与HNO_(3)的绝热量热研究

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核化学与放射化学 2024年第1期46卷 60-67,I0006页

作者：徐晓琴刘巍余勇斌吴瑞才唐双凌南京理工大学环境与生物工程学院江苏南京210000

通过绝热加速量热仪(ARC)探究丁醇、丁醛、丁酮及丁酸四种组分与HNO_(3)的放热行为,对测试结果进行对比分析,并通过热危险性综合评估指数(THI指数)法评估体系危险性。结果表明:在零氧平衡条件下,丁醛-HNO_(3)体系自放热最明显,当丁醛含... 详细信息

通过绝热加速量热仪(ARC)探究丁醇、丁醛、丁酮及丁酸四种组分与HNO_(3)的放热行为,对测试结果进行对比分析,并通过热危险性综合评估指数(THI指数)法评估体系危险性。结果表明:在零氧平衡条件下,丁醛-HNO_(3)体系自放热最明显,当丁醛含量仅0.14 g时体系的绝热温升达到118.4℃,放热量为776.6 J/g;丁醇-HNO_(3)体系在40.2℃左右时开始发生放热,自反应放热段最高温度达到145.7℃,最大压力达到34 bar(1 bar=10^(5)Pa)左右;丁酮-HNO_(3)体系从50℃开始放热至136℃结束,放热量为564.0 J/g;丁酸-HNO_(3)体系在小于140.0℃的温度范围内未观察到放热点。随着HNO_(3)浓度的增加(2.0→6.0 mol/L),丁醇-HNO_(3)体系危险性从中等增加到较高级别;丁醇、丁醛、丁酮及丁酸与4.0 mol/L HNO_(3)的反应体系的危险性分别在较高、较高、中等、中等级别。

关键词：红油丁醇丁醛丁酮丁酸 HNO_(3) 绝热加速量热仪 THI指数

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Mineralogy of northern nearside mare basalts

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Research in Astronomy and Astrophysics 2019年第4期19卷 33-40页

作者： Zhen-Chao Wang yun-Zhao wu xiao-Meng Zhang yu Lu Key Laboratory of Surficial Geochemistry Ministry of Education Department of Earth Sciences Nanjing University Key Laboratory of Planetary Sciences Purple Mountain Observatory Chinese Academy of Sciences CAS Center for Excellence in Comparative Planetology Xuzhou Bureau of Land and Resources School of Geographic and Oceanographic Sciences Nanjing University Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application

The mineralogy of mare basalts reflects the chemical composition of the magma source, as well as the physical and chemical environment of the rocks' formation. This is significant for understanding the thermal evolution of the Moon. In this study, the spatial distribution of mineralogy on the lunar northern nearside basalts was mapped using the Moon Mineralogy Mapper(M^3) data. The study area, which is an elongated mare, Mare Frigoris and northern Mare Imbrium, was mapped and characterized into 27 units based on multi-source data, including spectrum, terrain and element abundance. We extracted 177 M^3 spectra from fresh craters. Spectral parameters such as absorption center and band area ratio(bar)were obtained through data processing. The variation of mafic minerals in this region was acquired by analyzing these parameters. The basaltic units in eastern Mare Frigoris, which are older, have been found to be dominated by clinopyroxene with lower CaO compared to the returned lunar samples; this is similar to older basaltic units in Mare Imbrium. The basaltic units of western Mare Frigoris and Sinus Roris which are younger have been found to be rich in olivine. The late-stage basalts in Oceanus Procellarum and Mare Imbrium show the same feature. These widespread olivine-rich basalts suggest uniqueness in the evolution of the Moon. Geographically speaking, Mare Frigoris is an individual mare, but the magma source region has connections with surrounding maria in consideration of mineral differences between western and eastern Frigoris, as well as mineral similarities with maria at the same location.

关键词： Moon evolution imaging spectroscopy data analysis

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Ratiometric hypoxia detection by bright organic room temperature phosphorescence of uniformed silica nanoparticles in water

聚集体(英文)

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聚集体(英文) 2023年第1期4卷 158-164页

作者： Tong He wu-Jie Guo yu-Zhe Chen xiao-Feng Yang Chen-Ho Tung Li-Zhu wu Key Laboratory of Photochemical Conversion and Optoelectronic Materials&CAS-HKU Joint Laboratory on New Materials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijingChina Department of Chemistry North University of ChinaTaiyuanChina University of Chinese Academy of Sciences BeijingChina

Organic room temperature phosphorescence(RTP)in water has attracted much attention recently for its potential biological ***,it remains a formidable challenge to achieve efficient RTP from pure organic compounds in aqueous phase due to the dramatic deactivation of triplet excited states in water and the poor water dispersibility of large organic particles/*** herein is covalent incorporation of a pure organic monochromophore in silica nanoparticles(SiNPs)featuring fluorescence and bright phosphorescence in aqueous *** covalent bonding of organic phosphors in polysiloxane framework was found to show excellent water dispersibility,at the same time suppress the nonradiative deactivation of triplet excited states especially from water,thus leading to high phosphorescence quantum yields(up to 22%)and long lifetimes(up to 3.5 ms)in aqueous *** strikingly,oxygen-insensitive fluorescence as internal reference and oxygen-dependent phosphorescence as oxygen indicator from the organic chromophore in the porous SiNPs realized ratiometric hypoxia detection with ultrasensitivity(K_(SV)=449.3 bar^(-1)).

关键词： aqueous solution hypoxia detection pure organic compound room temperature phosphorescence silica nanoparticle

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A large area ^(3)He tube array detector with vacuum operation capacity for the SANS instrument at the CSNS

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Nuclear Science and Techniques 2022年第7期33卷 83-92页

作者： Xing-Fen Jiang Jian-Rong Zhou Hong Luo Liang xiao xiao-Juan Zhou Hong Xu yuan-Guang Xia xiao-Guang wu Lin Zhu Wen-Qing Yang Gui-An Yang Bei-Ju Guan Hong-yu Zhang yu-Bin Zhao Zhi-Jia Sun yuan-Bo Chen State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China Spallation Neutron Source Science Center Dongguan523803China University of Chinese Academy of Sciences Beijing100049China

The small-angle neutron scattering(SANS)instrument,one of the first three instruments of the China Spallation Neutron Source(CSNS),is designed to probe the microscopic and mesoscopic structures of materials in the scale range 1–100 nm.A large-area ^(3)He tube array detector has been constructed and operates at the CSNS SANS instrument since August *** consists of 120 linear position-sensitive detector tubes,each 1 m in length and 8 mm in diameter,and filled with ^(3)He gas at 20 bar to obtain a high detection *** ^(3)He tubes were divided into ten modules,providing an overall area of 1000 mm×1020 mm with a high count rate *** each tube is installed independently,the detector can be quickly repaired in situ by replacing damaged *** reduce air scattering,the SANS detector must operate in a vacuum environment(0.1 mbar).An all-metal sealing technique was adopted to avoid high-voltage breakdown by ensuring a high-voltage connection and an electronic system working in an atmospheric environment.A position resolution of 7.8±0.1 mm(full width at maximum)is measured along the length of the tubes,with a high detection efficiency of 81±2% at *** over the past four years,the detector appears to perform well and with a high stability,which supports the SANS instrument to finish approximately 200 user scientific programs.

关键词： Neutron detectors ^(3)He tubes Gaseous detectors Small-angle neutron scattering

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地聚物混凝土动力学特性和微观机理研究

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四川水力发电 2024年第1期43卷 6-12页

作者：赖韦寒雨盖文杰肖峰余昊吴鑫洋周长发四川大学水利水电学院四川成都610065

为研究不同配合比对地聚物混凝土(GC)性能的影响,模型试验运用霍普金森压力杆(SHPB)装置对含不同粉煤灰、矿渣和硅粉掺量比的GC进行了系列动态力学试验,并利用扫描电子显微镜(SEM)对其微观结构进行分析。研究结果表明静载状态下矿渣或... 详细信息

为研究不同配合比对地聚物混凝土(GC)性能的影响,模型试验运用霍普金森压力杆(SHPB)装置对含不同粉煤灰、矿渣和硅粉掺量比的GC进行了系列动态力学试验,并利用扫描电子显微镜(SEM)对其微观结构进行分析。研究结果表明静载状态下矿渣或硅粉掺量较高的试件易获得更优的力学特性,而在动态荷载压缩试验中,含硅粉含量5%、矿渣含量45%的GC-2试件动态力学响应最优,DIF应变率敏感性也较高。研究成果对地聚物混凝土的掺混比具有一定的参考价值。

关键词：地聚物混凝土配合比设计动态力学特性细微观结构

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Computer Assisted Assignments of Rotationally Resolved Molecular Spectra

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Chinese Journal of Chemical Physics 2006年第1期19卷 39-42页

作者： Ling wu Li-juan Zheng xiao-hua Yang yu-yan Liu Yang-qin Chena Key Laboratory of Optical and MaEnetic Resonance Spectroscopy Ministry of Education and De-partment of Physics East China Normal University ShanEhai 200062 China School of Science Hangzhou Dianzi University Hangzhou 310018 China State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics Wuhan Institute of Physics and Mathematics Chinese Academy of Science Wuhan 430071 China

A graphically oriented interactive program for assignments of rotationally resolved molecular spectra has been devised. The program functions by grouping spectral lines in term of the second difference principle. and graphing spectral intensity versus frequency in a bar graph of the selected groups, distinguished by color and/or line-type. This allows for easy detection of regular patterns buried in the observed spectrum. Furthermore, it includes a Loomis-Wood view for assisting in spectral assignments. As an example, the program was applied in assigning the molecular spectrum of the production in the discharge of PCl3 buffered by helium gas, which may belong to several species. The results suggest that the program is highly efficient and quite useful in the assignment and the analysis of molecular spectra, especially those of symmetric top, slightly asymmetric top and linear molecules. The accuracy and efficiency of this program will likely ensure its wide application in the processing of molecular spectra.

关键词： Assignment Rotationally resolved Molecular spectra Computer assisted

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悬架用活塞一体式二级压缩机性能的研究

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压缩机技术 2024年第2期 17-23页

作者：武晓张铁柱鲁力群孙宾宾倪萌王昱文山东理工大学交通与车辆工程学院山东淄博255000 山东泰展机电科技股份有限公司山东淄博255000

为了了解空气悬架用大、小活塞一体式二级往复空气压缩机的工作性能,为新机型设计、优化和物理样机实验提供依据。根据整体尺寸建立压缩机运动学数学模型,基于AMESim对空气压缩机整个系统充罐过程进行建模和仿真,仿真得到新型空气压缩... 详细信息

为了了解空气悬架用大、小活塞一体式二级往复空气压缩机的工作性能,为新机型设计、优化和物理样机实验提供依据。根据整体尺寸建立压缩机运动学数学模型,基于AMESim对空气压缩机整个系统充罐过程进行建模和仿真,仿真得到新型空气压缩机一二级缸充罐过程中压力变化特性;并与传统单级压缩机型进行对比,仿真结果表明;新型二级活塞一体式空气压缩机在充罐压力较高时能保持较高的充气效率,在设定17bar工况下,气体对活塞作用力以及阻力矩峰值为传统机型的56%和47%,并且曲线变化更平缓,说明采用新型二级压缩机型能有效提高容积系数,降低负载波动,提高压缩机运行稳定性。对两种机型进行了物理样机试验,试验结果表明:在储气罐3.7 L,压力由大气压充压至17 bar条件下,新机型升压时间相较传统机型用时少27.3 s,在高压段新机型充气性能优于传统机型,仿真充罐规律与试验结果相吻合。

关键词：活塞式压缩机运动仿真充罐过程 AMESim

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CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

作者： Waleed Abdallah Tiago Carlos Adorno de Freitas Konstantin Afanaciev Shakeel Ahmad Ijaz Ahmed xiaocong Ai Abid Aleem Wolfgang Altmannshofer Fabio Alves Weiming An Rui An daniele Paolo Anderle Stefan Antusch Yasuo Arai Andrej Arbuzov Abdesslam Arhrib Mustafa Ashry Sha Bai yu Bai Yang Bai Vipul Bairathi Csaba Balazs Philip Bambade Yong Ban Tripamo Bandyopadhyay Shou-Shan Bao Desmond P.barber Ayse Bat Varvara Batozskaya Subash Chandra Behera Alexander Belyaev Michele Bertucci xiao-Jun Bi yuanjie Bi Tianjian Bian Fabrizio Bianchi Thomas Biekotter Michela Biglietti Shalva Bilanishvili Deng Binglin Denis Bodrov Anton Bogomyagkov Serge Bondarenko Stewart Boogert Maarten Boonekamp Marcello Borri Angelo Bosotti Vincent Boudry Mohammed Boukidi Igor Boyko Ivanka Bozovic Giuseppe Bozzi Jean-Claude Brient Anastasiia Budzinskaya Masroor Bukhari Vladimir Bytev Giacomo Cacciapaglia Hua Cai Wenyong Cai wujun Cai Yijian Cai Yizhou Cai yuchen Cai Haiying Cai Huacheng Cai Lorenzo Calibbi Junsong Cang Guofu Cao Jianshe Cao Antoine Chance Xuejun Chang yue Chang Zhe Chang Xinyuan Chang Wei Chao Auttakit Chatrabhuti Yimin Che yuzhi Che Bin Chen Danping Chen Fuqing Chen Fusan Chen Gang Chen Guoming Chen Hua-Xing Chen Huirun Chen Jinhui Chen Ji-yuan Chen Kai Chen Mali Chen Mingjun Chen Mingshui Chen Ning Chen Shanhong Chen Shanzhen Chen Shao-Long Chen Shaomin Chen Shiqiang Chen Tianlu Chen Wei Chen Xiang Chen xiaoyu Chen Xin Chen Xun Chen Xurong Chen Ye Chen Ying Chen yukai Chen Zelin Chen Zilin Chen Gang Chen Boping Chen Chunhui Chen Hok Chuen Cheng Huajie Cheng Shan Cheng Tongguang Cheng yunlong Chi Pietro Chimenti Wen Han Chiu Guk Cho Ming-Chung Chu xiaotong Chu Ziliang Chu Guglielmo Coloretti Andreas Crivellin Hanhua Cui xiaohao Cui Zhaoyuan Cui Brunella D'Anzi Ling-yun Dai Xinchen Dai Xuwen Dai Antonio De Maria Nicola De Filippis Christophe De La Taille Francesca De Mori Chiara De Sio Elisa Del Core Shuangxue Deng Wei-Tian Deng Zhi Deng Ziyan Deng Bhupal Dev Tang Dewen Biagio Di Micco Ran Ding Siqin Dingl Yadong Ding Haiyi Dong Jianin AGH University of Science and Technology Faculty of Physics and Applied Computer ScienceKrakow Anhui University HefeiAnhui Applied Physics Department Federal Urdu University of ArtsScience and TechnologyIslamabad Banaras Hindu University Institute of ScienceVaranasi Bandirma Onyedi Eylul University Bandirma Beihang University Beijing Beijing Computational Science Research Center Beijing Beijing Conveyi LTD Beijing Beijing Glass Research Institute Co. LtdBeijing Beijing Institute of Technology Beijing Beijing Normal University Beijing Brown University ProvidenceRI Budker Institute of Nuclear Physics Novosibirsk Cadi Ayyad University Laboratory of Fundamental and Applied PhysicsPolydisciplinary FacultyMarrakech Cairo University Giza Center for Theory and Computation National Tsing Hua UniversityHsinchu Central China Normal University WuhanHubei Central South University ChangshaHunan Centro de Fisica Teorica de Particulas Universidade Tecnica de LisboaLisboa Chengdu KaitengSifang Digital Radio&TV Equipment Co. LtdChengduSichuan China academy of engineering physics MianyangSichuan China building materials academy Beijing China Center of Advanced Science and Technology Beijing China Institute of Atomic Energy Beijing China Jiliang University HangzhouZhejiang China Nuclear Instrument CO. LTDBeijing China University of Geosciences Beijing China University of Geosciences WuhanHubei China University of Mining and Technology XuzhouJiangsu China West Normal University NanchongSichuan Chongqing University Department of PhysicsChongqing Chulalongkorn University Bangkok City University of Hong Kong Department of PhysicsHong Kong Cockcroft Institute Daresbury Cornell University IthacaNY CPPM(AMU/IPhU&CNRS/INP) Marseille Dalian Minzu University DalianLiaoning Dalian University of Technology Department of PhysicsDalian Deutsches Elektronen-Synchrotron DESY Hamburg Dzhelepov Laboratory of Nuclear Problems of Joint Institute for Nuclear Research(DLNP JINR) Dubna East China University Of Science And Technol

The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise

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Atomic scale structural characterization of {10 12} twin boundaries in zinc

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Transactions of Nonferrous Metals Society of China 2018年第8期28卷 1538-1542页

作者： Hai-chen wu You-xing yu xiao-fang BI School of Materials Science and Engineering Beihang UniversityBeijing 100191China

The structure and the migration mechanisms of {10 12} twin boundaries（TBs） of pure zinc deformed by rolling were studied using high-resolution transmission electron microscopy（HRTEM） at atomic scale. We found the presence of basal/prismatic（BP/PB） planes serrations on {10 12} TBs and the coexistence of two kinds of TBs with different structures in the same {10 12} twin： TBs composed of {10 12} coherent twin boundaries（CTBs） plus short BP/PB serrations, and TBs composed of successive BP/PB segments without {10 12} CTBs. The formation of BP/PB serrations has no relation to the c/a ratio of hexagonal-closepacked（HCP） metals because the BP/PB serrations are energetically preferred and geometrically favored. Based on dislocation theory, we proposed the migration mechanisms of the TBs to be the glide of twinning dislocations（TDs） on the CTBs and the climb of interface dislocations（IDs） on the BP/PB segments.

关键词： zinc twin boundaries basal/prismatic BP/PB serrations inigration mechanism high-resolution translnission electron inicroscopy (HRTEM)

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