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Theranostic of orthotopic gliomas by core-shell structured nanoplatforms

Light(Science & Applications) 2022年第6期11卷 1034-1035页

作者： Luis D.Carlos phantom-g CICECO-Aveiro Institute of MaterialsPhysics DepartmentUniversity of Aveiro3810-193 AveiroPortugal

Smart designed core-shell nanostructures formed by a YVO_(4)∶Nd^(3+) nanoparticle as the core,the sonosensitizer hematoporphyrinmonomethyl ether as the carrier,and MnO_(2) nanosheets as the shell demonstrate bimodal ... 详细信息

关键词： modal glioma orthotopic

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Synthesis and applications of lanthanoid complexes of pentadentate and hexadentate N_(5) and N_(6) macrocycles:A review

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Journal of Rare Earths 2024年第1期42卷 1-15,I0001页

作者： Julio Corredoira-Vázquez Cristina gonzález-Barreira Paula Oreiro-Martínez Ana M.garcía-Deibe Jesús Sanmartín-Matalobos Matilde Fondo Departamento de Química Inorganica Facultade de QuímicaUniversidade de Santiago de CompostelaCampus Vida15782Santiago de CompostelaSpain phantom-g CICECO-Aveiro Institute of MaterialsDepartment of PhysicsUniversity of Aveiro3810-193AveiroPortugal Institute of Materials(iMATUS) Universidade de Santiago de Compostela15782Santiago de CompostelaSpain

In this paper,the lanthanoid complexes of N_(5) and N_(6) macrocycle ligands,without pendant arms or additional heteroatoms,are *** review covers the period from 2015 to the current date,since in 2014 Schiff base macrocyclic ligands incorporating the pyridine moiety,and their complexes,were revised,and in 2015 the chemistry of pentaaza macrocycle ligands with rare earth metals was also *** and phthalocyanine ligands are not included in this review,which primarily focuses on complexes with Schiff bases and amines without pendant arms or any additional donor other than *** synthetic methods,structural characterization,based on single X-ray crystal data,and properties of the lanthanoid complexes,with special attention to magneto-structural correlations,are presented herein.

关键词： Lanthanoid N_(5),N_(6)macrocycle Coordination chemistry Chirality Biological activity Molecule magnet

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Less is more:dimensionality reduction as a general strategy for more precise luminescence thermometry

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Light(Science & Applications) 2022年第9期11卷 2127-2139页

作者： ERVINg XIMENDES RICCARDO MARIN LUIS DIAS CARLOS DANIEL JAQUE NanoBIg Departamento de Fisica de MaterialesFacultad de CienciasUniversidad Autónoma de MadridC/Francisco Tomás y Valiente 7Madrid 28049Spain NanoBIg Instituto Ramón y Cajal de Investigación Sanitaria(IRYCIS)Ctra.Colmenar km.9.100Madrid 28034Spain phantom-g CICECO-Aveiro Institute of MaterialsDepartment of PhysicsUniversity of AveiroAveiro 3810-193Portugal

Thermal resolution(also referred to as temperature uncertainty)establishes the minimum discernible temperature change sensed by luminescent thermometers and is a key figure of merit to rank *** has been done to minimize its value via probe optimization and correction of readout artifacts,but little effort was put into a better exploitation of calibration *** this context,this work aims at providing a new perspective on the definition of luminescence-based thermometric parameters using dimensionality reduction techniques that emerged in the last *** application of linear(Principal Component Analysis)and non-linear(t-distributed Stochastic Neighbor Embedding)transformations to the calibration datasets obtained from rare-earth nanoparticles and semiconductor nanocrystals resulted in an improvement in thermal resolution compared to the more classical intensity-based and ratiometric ***,in turn,enabled precise monitoring of temperature changes smaller than 0.1℃.The methods here presented allow choosing superior thermometric parameters compared to the more classical ones,pushing the performance of luminescent thermometers close to the experimentally achievable limits.

关键词： precise dimensionality luminescence

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Prediction of Swelling Behavior of AT-Isopropylacrylamide Hydrogels in Aqueous Solution of Sodium Chloride

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Chinese Journal of Chemical Engineering 2004年第3期12卷 425-432页

作者：许小平李忠琴黄兴华王绪绪付贤智 HütherAndreas Maurergerd Department of Chemical Engineering Fuzhou University Fuzhou 350002 China Lehrstuhl fur Technische Thermodynamik Universitat Kaiserslautern Postfach 3049 67663 Kaiserslautern Germany Lehrstuhl fur Technische Thermodynamik Universitat Kaiserslautern Postfach 3049 67663 Kaiserslautern Germanyn this paper a model is presented to correlate and predict the swelling behavior of hydrogels in aqueous solutions of electrolytes. The model is a combination of VERS-model "phantom network" theory and "free-volume" contribution. The VERS-model is used to calculate Gibbs excess energy "phantom network" theory to describe the elastic properties of polymer network and "free-volume" contribution to account for additional difference in the size of the species. To test the model a series of N-isopropylacrylamide based hydrogels are synthesized by free radical polymerization in oxygen-free deionized water at 25℃under nitrogen atmosphere. Then the degree of swelling of all investigated gels as well as the partition of the solute between the gel phase and the surrounding coexisting liquid phase are measured in aqueous solution of sodium chloride. The model test demonstrates that the swelling behavior correlated and predicted by the model agrees with the experimental data within the experimental uncertainty. The phase transition appeared in the experiment and the influences of the total mass fraction of polymerizable materials ζgel as well as the mole fraction of the crosslinking agent yCR on the swelling behavior of IPAAm-gels can also be predicted correctly. All these show the potential of such model for correlation and prediction of the swelling behavior of hydrogels in aqueous solutions of electrolytes.

In this paper, a model is presented to correlate and predict the swelling behavior of hydrogels in aqueous solutions of electrolytes. The model is a combination of VERS-model, 'phantom network' theory and 'free-volume' contribution. The VERS-model is used to calculate gibbs excess energy; 'phantom network' theory to describe the elastic properties of polymer network, and 'free-volume' contribution to account for additional difference in the size of the species. To test the model, a series of N-isopropylacrylamide based hydrogels are synthesized by free radical polymerization in oxygen-free, deionized water at 25℃ under nitrogen atmosphere. Then, the degree of swelling of all investigated gels as well as the partition of the solute between the gel phase and the surrounding coexisting liquid phase are measured in aqueous solution of sodium chloride. The model test demonstrates that the swelling behavior correlated and predicted by the model agrees with the experimental data within the experimental uncertainty. The phase transition appeared in the experiment, and the influences of the total mass fraction of polymerizable materials ζgel as well as the mole fraction of the crosslinking agent yCR on the swelling behavior of IPAAm-gels can also be predicted correctly. All these show the potential of such model for correlation and prediction of the swelling behavior of hydrogels in aqueous solutions of electrolytes.

关键词： VERS-model swelling of hydrogel N-isopropylacrylamide aqueous solution of NaCl

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Oral gd-DTPA as a negative gastrointestinal contrast agent in magnetic resonance cholangiopancreatography

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Journal of Medical Colleges of PLA(China) 2003年第5期18卷 325-330页

作者：陈燕萍张雪林昌仁民成官迅 Imaging Diagnostic Center Nanfang HospitalFirst Military Medical UniversityGuangzhou 510515China Imaging Diagnostic Center Nanfang HospitalFirst Military Medical UniversityGuangzhou 510515Chinabjective : To evaluate the value of oral Gd-DTPA as a negative contrast agent during magnetic resonance cholangiopancreatography (MRCP) to eliminate the high signals of the gastrointestinal tract. Methods: To select the optimal concentration of oral Gd-DTPA for MRCP a phantom study was performed followed by clinical trial in 15 cases undergoing MRCP before and after oral Gd-DTPA (in a total volume of 250 ml 1:5 diluted Gd-DTPA 1.488 g/L). MRCP images were acquired using two-dimensional single slice fast spin-echo ( SSTSE) sequence and half-Fourier acquisition single slice fast spin-echo (HASTE) sequence. Results: The phantom study showed that the 1:5 diluted oral Gd-DTPA was best in decreasing the signal intensity both in T2-weighted imaging (59. 5% ) and in HASTE sequence (82.45% ). The high signal intensity of the stomach and intestinal fluid was completely suppressed in all the cases. The depictions of the common bile duct and pancreatic duct were markedly improved by using the oral contrast agent (P<0.05). Conclusion: Oral Gd-DTPA is effective and safe for eliminating the high signal of the gastrointestinal tract to improve the depiction of the biliary system by MRCP.

Objective: To evaluate the value of oral gd-DTPA as a negative contrast agent during magnetic resonance cholangiopancreatography (MRCP) to eliminate the high signals of the gastrointestinal tract. Methods: To select the optimal concentration of oral gd-DTPA for MRCP, a phantom study was performed followed by clinical trial in 15 cases undergoing MRCP before and after oral gd-DTPA (in a total volume of 250 ml 1∶5 diluted gd-DTPA, 1.488 g/L). MRCP images were acquired using two-dimensional single slice fast spin-echo (SSTSE) sequence and half-Fourier acquisition single slice fast spin-echo (HASTE) sequence. Results: The phantom study showed that the 1∶5 diluted oral gd-DTPA was best in decreasing the signal intensity both in T2-weighted imaging (59.5%) and in HASTE sequence (82.45%). The high signal intensity of the stomach and intestinal fluid was completely suppressed in all the cases. The depictions of the common bile duct and pancreatic duct were markedly improved by using the oral contrast agent (Pgd-DTPA is effective and safe for eliminating the high signal of the gastrointestinal tract to improve the depiction of the biliary system by MRCP.

关键词： magnetic resonance cholangiopancreatography oral contrast agent pancreaticobiliary system gadolini-um-DTPA

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