Magnetochemistry最新文献_第2页

Magnetic Anisotropy and Slow Magnetic Relaxation in Two Mononuclear Octahedral Cobalt(II) Complexes 两个单核八面体钴（II）配合物的磁各向异性和慢磁弛豫

4区化学

Magnetochemistry Pub Date : 2025-02-11 DOI: 10.3390/magnetochemistry11020011

Hui−Hui Cui, Dou-Zun Wang, S. Y. Li, Leixin Wang, Xinrui Yu, Xiancong Liu, Jin Wang, Miao Wang, Yanfeng Tang

引用次数: 1

Digital Magnetic Sorting for Fractionating Cell Populations with Variable Antigen Expression in Cell Therapy Process Development. 数字磁分选在细胞治疗过程发展中用于分离可变抗原表达的细胞群。

IF 2.5 4区化学

Magnetochemistry Pub Date : 2024-11-01 Epub Date: 2024-10-23 DOI: 10.3390/magnetochemistry10110081

Savannah Bshara-Corson, Andrew Burwell, Timothy Tiemann, Coleman Murray

{"title":"Digital Magnetic Sorting for Fractionating Cell Populations with Variable Antigen Expression in Cell Therapy Process Development.","authors":"Savannah Bshara-Corson, Andrew Burwell, Timothy Tiemann, Coleman Murray","doi":"10.3390/magnetochemistry10110081","DOIUrl":"10.3390/magnetochemistry10110081","url":null,"abstract":"Cellular therapies exhibit immense potential in treating complex diseases with sustained responses. The manufacture of cell therapies involves the purification and engineering of specific cells from a donor or patient to achieve a therapeutic response upon injection. Magnetic cell sorting targeting the presence or absence of surface markers is commonly used for upfront purification. However, emerging research shows that optimal therapeutic phenotypes are characterized not only by the presence or absence of specific antigens but also by antigen density. Unfortunately, current cell purification tools like magnetic or fluorescence-activated cell sorting (FACS) lack the resolution to differentiate populations based on antigen density while maintaining scalability. Utilizing a technique known as digital magnetic sorting (DMS), we demonstrate proof of concept for a scalable, magnetic-based approach to fractionate cell populations based on antigen density level. Targeting CD4 on human leukocytes, DMS demonstrated fractionation into CD4Hi T cells and CD4Low monocytes and neutrophils as quantified by flow cytometry and single-cell RNA seq. DMS also demonstrated high throughput processing at throughputs 3-10× faster than FACS. We believe DMS can be leveraged and scaled to enable antigen density-based sorting in cell therapy manufacturing, leading to the production of more potent and sustainable cellular therapies.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":"10 11","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12352456/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144873904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Facile Synthesis of Core-Shell Magnetic Iron Oxide@SiO2-NH2 Nanoparticles and Their Application in Rapid Boron Removal from Aqueous Solutions 核-壳磁性铁Oxide@SiO2-NH2纳米颗粒的简易合成及其在水溶液中快速除硼的应用

4区化学

Magnetochemistry Pub Date : 2024-09-30 DOI: 10.3390/magnetochemistry10100074

Qinqin Hu, Manman Zhang, Jiaoyu Peng, Yaping Dong, Li Wu, Lingzong Meng

{"title":"Facile Synthesis of Core-Shell Magnetic Iron Oxide@SiO2-NH2 Nanoparticles and Their Application in Rapid Boron Removal from Aqueous Solutions","authors":"Qinqin Hu, Manman Zhang, Jiaoyu Peng, Yaping Dong, Li Wu, Lingzong Meng","doi":"10.3390/magnetochemistry10100074","DOIUrl":"https://doi.org/10.3390/magnetochemistry10100074","url":null,"abstract":"In this study, amino-functionalized magnetic particles (iron oxide@SiO2-NH2) with core-shell structures were synthesized and evaluated for rapid boron removal from aqueous solutions. The results showed that the specific surface area of the iron oxide@SiO2-NH2 (131.24 m2⋅g−1) increased greatly compared to pure iron oxide (30.98 m2⋅g−1). The adsorption equilibrium was less than 2 h, with an adsorption capacity of 29.76 mg⋅g−1 at pH = 6 at 15 °C. The quasi-second-order kinetic model described the boron adsorption process well, and both the Langmuir and Freundlich models were suitable for characterizing the adsorption isotherms. The zeta potential and XPS analysis before and after adsorption revealed that the main adsorption mechanism was the hydrogen bonding formation between the terminal -NH2 groups of the adsorbent and the boric acid. In addition, the adsorbent still maintained a high adsorption performance after five adsorption–desorption cycles, which illustrated that the iron oxide@SiO2-NH2 may be a potential adsorbent for environmental boron removal treatment.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":"10 10","pages":"74-74"},"PeriodicalIF":0.0,"publicationDate":"2024-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2312-7481/10/10/74/pdf?version=1727707567","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147877834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

One-Step Preparation Method and Rapid Detection Implementation Scheme for Simple Magnetic Tagging Materials 简单磁性标签材料的一步制备方法及快速检测实现方案

4区化学

Magnetochemistry Pub Date : 2024-06-22 DOI: 10.3390/magnetochemistry10070044

Xianxiao Song, Weiting Ma, Ping Song, Hongying Wang

{"title":"One-Step Preparation Method and Rapid Detection Implementation Scheme for Simple Magnetic Tagging Materials","authors":"Xianxiao Song, Weiting Ma, Ping Song, Hongying Wang","doi":"10.3390/magnetochemistry10070044","DOIUrl":"https://doi.org/10.3390/magnetochemistry10070044","url":null,"abstract":"With the widespread application of tagging materials, existing chemical tagging materials exhibit limitations in stability and detection under field conditions. This study introduces a novel magnetic detection scheme. Hydrophilic material-modified Fe3O4 nanoparticles (COOH-PEG@Fe3O4 NPs) were synthesized using the co-precipitation technique. The content of Fe3O4 nanoparticles in the magnetic tagging liquid can reach up to 10 wt% and remain stable in an aqueous phase system for seven days. This research details the preparation process, the characterization methods (IR, 1HNMR, EDX, XRD, SEM, TEM, VSM, DLS), and the performance effects of the materials in magnetic tagging. Experimental results indicate that COOH-PEG@Fe3O4 NPs exhibit high remanence intensity (Br = 1.75 emu/g) and considerable stability, making it possible to quickly detect tagged liquids in the field using portable flux meters and optical pump magnetometers. This study provides new insights into the design and application of magnetic tagging materials, making it particularly suitable for long-term tagging and convenient detection in field scenarios.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":"10 7","pages":"44-44"},"PeriodicalIF":0.0,"publicationDate":"2024-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.mdpi.com/2312-7481/10/7/44/pdf?version=1719066399","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147912520","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method 利用响应面法制备和优化除磷吸附剂

IF 2.7 4区化学

Magnetochemistry Pub Date : 2024-01-09 DOI: 10.3390/magnetochemistry10010005

Zhanmei Zhang, Zuqin Zou, Xiaoyu Ren, Yunxuan Huang, Yang Deng, Huaili Zheng

{"title":"Preparation and Optimization of the Adsorbent for Phosphorus Removal Using the Response Surface Method","authors":"Zhanmei Zhang, Zuqin Zou, Xiaoyu Ren, Yunxuan Huang, Yang Deng, Huaili Zheng","doi":"10.3390/magnetochemistry10010005","DOIUrl":"https://doi.org/10.3390/magnetochemistry10010005","url":null,"abstract":"A diatomaceous earth (DE)-based adsorbent DE-Ce was prepared and optimized to remove phosphorus from wastewater. DE was modified through purification–cerium loading, improving its phosphorus adsorption capacity and recycling ability. The preparation conditions were optimized using the Box–Behnken design, and the response surface method was employed to analyze the effects of roasting temperature, cerium concentration, and HCl concentration on the preparation of DE-Ce. Scanning electron microscopy, X-ray fluorescence spectrometry, and X-ray photoelectron spectroscopy were used for characterization, with results indicating that HCl washing can effectively remove impurities. Cerium was mainly loaded onto DE in the form of Ce(OH)3, and pore size and capacity increased following cerium loading, with the formation of a macroporous structure. The obtained DE-Ce adsorbent removed 98.30% phosphorous, with the removal process following the secondary kinetic and Langmuir models. According to material characterization and model analysis results, the phosphorus removal mechanism primarily involves electrostatic adsorption, ligand exchange, and precipitation. Overall, the findings indicate that cerium modification can effectively improve the adsorption capacity of DE.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":"20 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139443362","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Effect of Magnetically Induced Local Structure and Volume Fraction on the Electromagnetic Properties of Elastomer Samples with Ferrofluid Droplet Inserts 磁感应局部结构和体积分数对带有铁流体液滴嵌入件的弹性体样品电磁特性的影响

IF 2.7 4区化学

Magnetochemistry Pub Date : 2024-01-02 DOI: 10.3390/magnetochemistry10010004

C. Marin, I. Malaescu

{"title":"The Effect of Magnetically Induced Local Structure and Volume Fraction on the Electromagnetic Properties of Elastomer Samples with Ferrofluid Droplet Inserts","authors":"C. Marin, I. Malaescu","doi":"10.3390/magnetochemistry10010004","DOIUrl":"https://doi.org/10.3390/magnetochemistry10010004","url":null,"abstract":"The magnetic permeability (μ), dielectric permittivity (ε) and electrical conductivity (σ) of six elastomer samples obtained by mixing silicone rubber (RTV-530) with a kerosene-based ferrofluid in different volume fractions (φ), 1.31%, 2.59% and 3.84%, were determined using complex impedance measurements over a frequency range of 500 Hz–2 MHz. Three samples (A0, B0 and C0) were manufactured in the absence of a magnetic field, and the other three samples (Ah, Bh and Ch) were manufactured in the presence of a magnetic field, H = 43 kA/m. The component μ″ of the complex effective magnetic permeability of all samples presents a maximum at a frequency, fmax, that moves to higher values by increasing φ, with this maximum being attributed to Brownian relaxation processes. The conductivity spectrum, σ (f), of all samples follows the Jonscher universal law, which allows for both the determination of the static conductivity, σDC, and the barrier energy of the electrical conduction process, Wm. For the same φ, Wm is lower, and σDC is higher in the samples Ah, Bh and Ch than in the samples A0, B0 and C0. The performed study is useful in manufacturing elastomers with predetermined properties and for possible applications such as magneto-dielectric flexible electronic devices, which can be controlled by the volume fraction of particles or by an external magnetic field.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":"122 3","pages":""},"PeriodicalIF":2.7,"publicationDate":"2024-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139391467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction: Li et al. Dry Friction Performances of MoNx Coatings Deposited by High–Power Pulsed Magnetron Sputtering. Magnetochemistry 2023, 9, 60 更正：高功率脉冲磁控溅射沉积的 MoNx 涂层的干摩擦性能。磁化学，2023，9，60

IF 2.7 4区化学

Magnetochemistry Pub Date : 2023-12-29 DOI: 10.3390/magnetochemistry10010003

Fuqiang Li, Wei Dai, Qimin Wang, Haiqing Li, Zhengtao Wu

引用次数: 0

The Influence of Viscosity on Heat Dissipation under Conditions of the High-Frequency Oscillating Magnetic Field 高频振荡磁场条件下粘度对散热的影响

IF 2.7 4区化学

Magnetochemistry Pub Date : 2023-12-24 DOI: 10.3390/magnetochemistry10010002

M. Molčan, A. Skumiel, Jana Tóthová, K. Paulovičová, P. Kopčanský, M. Timko

{"title":"The Influence of Viscosity on Heat Dissipation under Conditions of the High-Frequency Oscillating Magnetic Field","authors":"M. Molčan, A. Skumiel, Jana Tóthová, K. Paulovičová, P. Kopčanský, M. Timko","doi":"10.3390/magnetochemistry10010002","DOIUrl":"https://doi.org/10.3390/magnetochemistry10010002","url":null,"abstract":"High-frequency components such as microprocessors, transistors, antennas, voltage-controlled oscillators, and many others generate a large amount of heat. In the absence of satisfactory cooling, these components may suffer damage or even destruction. Therefore, it is important to find effective ways to cool these components. A possible solution is to use oil-based magnetic fluids. Magnetic fluids contain magnetic particles dispersed in oil, and their properties, including viscosity, affect their cooling capabilities. Viscosity can be changed by adding various additives or by adjusting the concentration of magnetic particles. The advantage of using oil-based magnetic fluids for cooling is that they allow for precise dosing and control of the amount of fluid applied to the component, reducing thermal losses and increasing cooling efficiency. In addition, oil-based magnetic fluids can also act as a dielectric, reducing electrical noise and increasing electromagnetic compatibility with the components. Analyzing the heating rate of magnetic fluids consisting of mineral oils in an alternating magnetic field with a frequency of 500 kHz, we have shown the capability of controlling thermal losses by adjusting the viscosity of the carrier liquid.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":"90 1","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139159916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Functional Molecular Materials Insights 功能分子材料透视

IF 2.7 4区化学

Magnetochemistry Pub Date : 2023-12-20 DOI: 10.3390/magnetochemistry10010001

Laura C. J. Pereira, D. Belo

引用次数: 0

Effect of Electrode–Normal Magnetic Field on the Motion of Hydrogen Bubbles 电极法向磁场对氢气泡运动的影响

IF 2.7 4区化学

Magnetochemistry Pub Date : 2023-12-18 DOI: 10.3390/magnetochemistry9120233

Yen-Ju Chen, Yan-Hom Li, Ching-Yao Chen

{"title":"Effect of Electrode–Normal Magnetic Field on the Motion of Hydrogen Bubbles","authors":"Yen-Ju Chen, Yan-Hom Li, Ching-Yao Chen","doi":"10.3390/magnetochemistry9120233","DOIUrl":"https://doi.org/10.3390/magnetochemistry9120233","url":null,"abstract":"In comparison to alternative methods for hydrogen production, water electrolysis stands out as the optimal means for obtaining ultra-pure hydrogen. However, its widespread adoption is significantly hampered by its low energy efficiency. It has been established that the introduction of an external magnetic field can mitigate energy consumption, consequently enhancing electrolysis efficiency. While much of the research has revealed that an electrode–parallel magnetic field plays a crucial role in enhancing the bubble detachment process, there has been limited exploration of the effect of electrode–normal magnetic fields. In this work, we compare the water electrolysis efficiency of a circular electrode subjected to electrode–normal magnetic field resulting in a magnet edge effect and electrode edge effect by varying the sizes of the magnet and electrode. The findings indicate that a rotational flow caused by the Lorentz force facilitates the detachment of the hydrogen from the electrode surface. However, the rotation direction of hydrogen gas bubbles generated by the magnet edge effect is opposite to that of electrode edge effect. Furthermore, the magnet edge effect has more significant influence on the hydrogen bubbles’ locomotion than the electrode edge effect. With an electrode gap of 30 mm, employing the magnet edge effect generated by a single magnet leads to an average of 4.9% increase in current density. On the other hand, the multiple magnet effects created by multiple small magnets under the electrode can further result in an average 6.6% increase in current density. Nevertheless, at an electrode spacing of 50 mm, neither the magnet edge effect nor the electrode edge effect demonstrates a notable enhancement in conductivity. In reality, the electrode edge effect even leads to a reduction in conductivity.","PeriodicalId":18194,"journal":{"name":"Magnetochemistry","volume":"74 7","pages":""},"PeriodicalIF":2.7,"publicationDate":"2023-12-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139173816","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0