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Multibranched-Based Fluorinated Materials:Tailor-Made Design of ^(19)F‑MRI Probes

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Accounts of Materials Research 2023年第1期4卷 71-85页

作者： Beatrice Lucia bona Olga k.shk.na Cristina Chirizzi Valentina Dichiarante Pierangelo Metrangolo Francesca Baldelli Bombelli SupraBioNanoLab Department of ChemistryMaterials and Chemical Engineering“Giulio Natta”Politecnico di MilanoMilan 20131Italy Sustainable Polymer Chemistry Group Department of Molecules and MaterialsMesa+Institute for NanotechnologyUniversity of TwenteTwente 7522 NBThe Netherlands

CONSPECTUS: Future medicine is primarily aiming at the development of novel approachesfor an early diagnosis of diseases and a personalized therapy for patients. For achieving theseobjectives, a k.y role is played by medical imaging. Among available noninvasive imagingtechniques, Fluorine-19 (^(19)F) Magnetic Resonance Imaging (MRI) is emerging as a powerfulquantitative detection modality for clinical use both for molecular imaging and for cell *** strength of using ^(19)F-MRI is mainly related to the lack.of endogenous organic fluorine intissues, with no back.round, enabling the visualization of fluorinated tracers as hot-spot images,adding secondary independent information to the anatomical features provided by thegrayscale ^(1)H-MRI. The main challenge for ^(19)F-MRI clinical application is the intrinsic reducedsensitivity of MRI. To improve sensitivity, undoubtedly the use of a high field MRI scanner andcryogenic radiofrequency probes is advantageous, but there is a clear need of developingincreasingly effective fluorinated *** ideal tracer should bear as many as possible magnetically equivalent fluorine atoms andshow optimal magnetic resonance relaxivity properties (i.e., T_(1) and T_(2)), which enable reduced acquisition time with the possibility toapply fast imaging methods. Moreover, it should be biocompatible with reduced tendency to bioaccumulate in tissues, which is oneof the main drawback. in using perfluorocarbons (PFCs), together with their difficulty to be chemically modified with functionalgroups. In fact, PFCs such as perfluorooctyl bromide (PFOB), perfluoro-15-crown-5-ether (PFCE), and linear perfluoropolyethers(PFPE) are currently the most used tracers in ^(19)F-MRI preclinical and clinical studies, with the above-mentioned limitations. In thisregard, molecules bearing short branched fluorinated chains gained a lot of attention for their high number of equivalent fluorinesand expected capability of reducing bioaccumulation concern

关键词： fluorine Probe scanner

Measurement-induced nonlocality based on affinity

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Communications in Theoretical Physics 2020年第7期72卷 42-48页

作者： R Muthuganesan V k.Chandrasek.r Centre for Nonlinear Science&Engineering School of Electrical&Electronics EngineeringSASTRA Deemed UniversityThanjavur—613401Tamil NaduIndia

Measurement-induced nonlocality(MIN),a quantum correlation measure for bipartite systems,is an indicator of maximal global effects due to locally invariant von Neumann projective *** is originally defined as the maximal square of the Hilbert-Schmidt norm of the difference between pre-and post-measurement *** this article,we propose a new form of MIN based on *** quantity satisfies all the criteria of a bona fide measure of quantum correlation *** quantity is evaluated for both arbitrary pure and 2×n dimensional(qubit-qudit)mixed *** operational meaning of the proposed quantity is interpreted in terms of the interferometric power of the quantum *** apply these results on two-qubit mixed states,such as the Werner,isotropic and Bell diagonal states.

关键词： affinity nonlocality quantum correlation local measurements

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状态空间分析导论

状态空间分析导论

作者： L.k.·蒂莫西(L.k. Timothy) B.E.·博纳(B.E. bona)

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状态空间分析导论

状态空间分析导论

作者： L.k.·蒂莫西(L.k. Timothy) B.E.·博纳(B.E. bona)

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状态空间分析导论上 1版

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Numerical treatment of Benjamin-bona-Mahony-Burgers equation with fourth-order improvised B-spline collocation method

1981年

作者：（美）蒂莫西（L.k.Timothy）（美）博纳（B.E.bona）胡钦训刘颖译

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Journal of Ocean Engineering and Science 2022年第2期7卷 99-111页

作者： Shallu V.k.k.k.eja Department of Mathematics SLIETLongowal148106PunjabIndia

In this work.the Benjamin-bona-Mahony-Burgers(BBMB)equation is solved using an improvised cubic B-spline collocation *** equation describes the propagation of small amplitude waves in a non-linear dispersive medium,in the modeling of unidirectional planar *** to the higher smoothness and sparse nature of matrices corresponding to splines,cubic B-splines are chosen as the basis function in the collocation ***,the optimal accuracy and order of convergence cannot be achieved using the standard B-spline collocation *** to overcome this,improvised cubic B-splines are formed by mak.ng posteriori corrections to cubic B-spline interpolant and its higher-order *** Crank.Nicolson scheme is used to discretize the temporal domain along with the quasilinearization process to deal with the nonlinear *** spatial domain discretization is carried out using the improvised cubic B-spline collocation method(ICSCM).The stability analysis of the technique is performed using the von-Neumann *** test problems are solved numerically and obtained results are compared with the results available in the *** aim of the paper is to show that such improvised techniques which were earlier used to solve ODEs,can be applied to solve the BBMB equation also,with excellent accuracy in results.

关键词： Benjamin-bona-Mahony-Burgers equation Unidirectional planar waves Cubic B-splines Improvised collocation method Stability analysis von-Neumann L∞and L 2 error norms

Painlev Analysis,Lie Symmetries and Exact Solutions for Variable Coefficients Benjamin-bona-Mahony-Burger (BBMB) Equation

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Communications in Theoretical Physics 2013年第8期60卷 175-182页

作者： Vik.s k.mar R.k.Gupta Ram Jiwari School of Mathematics and Computer Applications Thapar UniversityPatiala147004PunjabIndia

In this paper, a variable-coefficient Benjarnin-bona-Mahony-Burger （BBMB） equation arising as a math- ematical model of propagation of small-amplitude long waves in nonlinear dispersive media is investigated. The inte- grability of such an equation is studied with Painlevd analysis. The Lie symmetry method is performed for the BBMB equation and then similarity reductions and exact solutions are obtained based on the optimal system method. Further- more different types of solitary, periodic and k.nk.waves can be seen with the change of variable coefficients.

关键词： BBMB equation Painleve analysis Lie symmetric analysis exact solutions

原料油汽化特性对催化裂化反应结焦过程影响的CFD模拟

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化工学报 2022年第7期73卷 2982-2995页

作者：陈昇王梦钶鲁波娜李秀峰刘岑凡刘梦溪范怡平卢春喜中国特种设备检测研究院炼油与化工装备风险防控国家市场监管技术创新中心北京100029 中国石油大学(北京)重质油国家重点实验室北京102249 中国科学院过程工程研究所多相复杂系统国家重点实验室北京100190 中国科学院大学化工学院北京101408

为考察原料油汽化特性影响,在一套百万吨级工业FCC提升管中,基于多相欧拉模型耦合EMMS曳力和传质、油滴汽化和十二集总反应动力学模型,采用三维CFD模拟研究气液固三相流动、汽化、反应、结焦的复杂过程,新开发结焦预测模型定量预测结焦... 详细信息

为考察原料油汽化特性影响,在一套百万吨级工业FCC提升管中,基于多相欧拉模型耦合EMMS曳力和传质、油滴汽化和十二集总反应动力学模型,采用三维CFD模拟研究气液固三相流动、汽化、反应、结焦的复杂过程,新开发结焦预测模型定量预测结焦状况,对比研究不同原料油雾化液滴粒径和起始汽化温度下各相和反应组分浓度场、温度场分布和结焦程度。结果表明,模拟方法可较准确预测汽化、反应生焦和结焦过程,不同雾化液滴粒径和起始汽化温度通过流场分布和汽化快慢影响液相油滴汽化率和反应转化率;合适液滴粒径(60μm)和起始汽化温度(654 k.可提升轻油、汽油、液化石油气目标产品收率并改善结焦程度。

关键词：催化裂化多相反应汽化结焦 CFD

鸡公山国家级自然保护区散孔材、环孔材树种木质部结构和功能的关系

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浙江农林大学学报 2022年第2期39卷 244-251页

作者：黄恺翔俞重阳钱海蓉上官方京汤璐瑶张博纳谢江波浙江农林大学省部共建亚热带森林培育国家重点实验室浙江杭州311300 浙江农林大学林业与生物技术学院浙江杭州311300 中国科学院新疆生态与地理研究所荒漠与绿洲生态国家重点实验室新疆乌鲁木齐830011

【目的】木质部解剖结构是植物水力功能和水分利用策略的基础。散孔材和环孔材的导管分布和形态存在显著差异,对2种材性树种木质部解剖结构和水力功能的关系进行比较,有助于理解不同材性树种的水分适应机制。【方法】选取河南省信阳市... 详细信息

【目的】木质部解剖结构是植物水力功能和水分利用策略的基础。散孔材和环孔材的导管分布和形态存在显著差异,对2种材性树种木质部解剖结构和水力功能的关系进行比较,有助于理解不同材性树种的水分适应机制。【方法】选取河南省信阳市鸡公山自然保护区中的3个散孔材树种(枫香Liquidambar formosana、旱柳Salix matsudana、深山含笑Michelia maudiae)和3个环孔材树种(槲树Quercus dentata、楝Melia azedarach、野核桃Juglans cathayensis),研究2种材性树种的枝水力功能(比导率和栓塞抗性)和解剖结构的关系。【结果】3个环孔材树种比导率更大,3个散孔材树种栓塞抗性更强;在物种水平上,只有散孔材树种深山含笑比导率和栓塞抗性呈显著负相关(P<0.05),存在水力效率-安全权衡。3种散孔材树种相较于3种环孔材树种具有更大的导管密度、导管壁厚度跨度比和更小的导管直径、导管壁厚度。【结论】环孔材树种倾向于通过增大导管直径显著提高其输水效率,从而避免水势下降、降低潜在栓塞风险。散孔材树种木质部结构中的导管壁厚度和导管壁厚度跨度比对植物水分传输功能具有重要影响。

关键词：散孔材环孔材木质部结构比导率栓塞抗性权衡