keyword
https://read.qxmd.com/read/38296892/cryoablation-for-the-treatment-of-breast-cancer-immunological-implications-and-future-perspectives-%C3%A2-utopia-or-reality
#21
REVIEW
Francesca Galati, Andrea Marra, Federica Cicciarelli, Marcella Pasculli, Roberto Maroncelli, Veronica Rizzo, Giuliana Moffa, Federica Pediconi
Cryoablation is a minimally invasive technique currently employed in breast cancer care, that uses freeze and thaw cycles to treat benign breast lesions, small breast cancers or focal sites of metastatic disease in patients not eligible for surgery. The final goal of this procedure is to destroy breast cancer cells using extreme cold. In addition, several studies have shown that this technique seems to have an enhancing effect on the immune response, especially by increasing the expression of tumor neoantigens specific to tumor cells, which are then attacked and destroyed...
January 31, 2024: La Radiologia Medica
https://read.qxmd.com/read/38294119/co-induced-dimer-decay-responsible-for-gem-dicarbonyl-formation-on-a-model-single-atom-catalyst
#22
JOURNAL ARTICLE
Chunlei Wang, Panukorn Sombut, Lena Puntscher, Zdenek Jakub, Matthias Meier, Jiri Pavelec, Roland Bliem, Michael Schmid, Ulrike Diebold, Cesare Franchini, Gareth Steven Parkinson
The ability to coordinate multiple reactants at the same active site is important for the wide-spread applicability of single-atom catalysis. Model catalysts are ideal to investigate the link between active site geometry and reactant binding, because the structure of single-crystal surfaces can be precisely determined, the adsorbates imaged by scanning tunneling microscopy (STM), and direct comparisons made to density functional theory. In this study, we follow the evolution of Rh1 adatoms and minority Rh2 dimers on Fe3O4(001) during exposure to CO using time-lapse STM at room temperature...
January 31, 2024: Angewandte Chemie
https://read.qxmd.com/read/38279707/enzymatic-synthesis-of-indole-based-imidazopyridine-using-%C3%AE-amylase
#23
JOURNAL ARTICLE
Priya Kamboj, Vikas Tyagi
The imidazo[1,2-a]pyridine scaffold has gained significant attention due to its presence as a lead structure in several commercially available pharmaceuticals like zolimidine, zolpidem, olprinone, soraprazan, etc. Further, indole-based imidazo[1,2-a]pyridine derivatives have been found interesting due to their anticancer and antibacterial activities. However, limited methods have been reported for the synthesis of indole-based imidazo[1,2-a]pyridines. In this study, we have successfully developed a biocatalytic process for synthesizing indole-based imidazo[1,2-a]pyridine derivatives using the α-amylase enzyme catalyzed Groebke-Blackburn-Bienayme (GBB) multicomponent reaction of 2-aminopyridine, indole-3-carboxaldehyde, and isocyanide...
January 27, 2024: Chembiochem: a European Journal of Chemical Biology
https://read.qxmd.com/read/38276454/preparation-characterization-and-lubrication-performances-of-water-based-nanolubricant-for-micro-rolling-strips
#24
JOURNAL ARTICLE
Yuchuan Zhu, Hongmei Zhang, Na Li, Zhengyi Jiang
Water-based nanolubricants are widely used in rolling processes due to their unique characteristics. As a common additive, nanoparticles could significantly improve the tribological properties of the lubricant. However, the effect of the physical properties of the particles on the anti-friction behavior is unclear. In this study, the effect of Fe3 O4 nanoparticles as an additive for the prepared lubricant is studied. The tribological properties of Fe3 O4 water-based nanolubricant are examined using a tribometer and a scratch meter...
January 21, 2024: Materials
https://read.qxmd.com/read/38276448/study-on-magnetic-and-plasmonic-properties-of-fe-3-o-4-pei-au-and-fe-3-o-4-pei-ag-nanoparticles
#25
JOURNAL ARTICLE
Shuya Ning, Shuo Wang, Zhihui Liu, Naming Zhang, Bin Yang, Fanghui Zhang
Magnetic-plasmonic nanoparticles (NPs) have attracted great interest in many fields because they can exhibit more physical and chemical properties than individual magnetic or plasmonic NPs. In this work, we synthesized Au- or Ag-decorated Fe3 O4 nanoparticles coated with PEI (Fe3 O4 -PEI-M (M = Au or Ag) NPs) using a simple method. The influences of the plasmonic metal NPs' (Au or Ag) coating density on the magnetic and plasmonic properties of the Fe3 O4 -PEI-M (M = Au or Ag) NPs were investigated, and the density of the plasmonic metal NPs coated on the Fe3 O4 NPs surfaces could be adjusted by controlling the polyethyleneimine (PEI) concentration...
January 21, 2024: Materials
https://read.qxmd.com/read/38267750/copper-ii-complex-supported-on-magnetic-nanoparticles-as-a-novel-nanocatalyst-for-the-synthesis-of-imidazo-1-2-a-pyridines
#26
JOURNAL ARTICLE
Shanshan Jiang
Research on the synthesis of imidazo[1,2-a]pyridines has gained great importance among synthetic chemists because there have been numerous reports of their biological and medicinal activities. In this respect, we fabricated CuCl2 immobilized on Fe3 O4 nanoparticles modified with 1,10-phenanthroline-5,6-diol [Fe3 O4 @Diol/Phen-CuCl2 ] and investigated its catalytic activity for the preparation of imidazo[1,2-a]pyridine derivatives through one-pot three-component reaction of 2-aminopyridines, aldehydes and terminal alkynes under ecofriendly conditions...
January 25, 2024: Molecular Diversity
https://read.qxmd.com/read/38262058/impact-of-choline-hydroxide-supported-magnetic-nanoparticles-on-peroxidase-activity-and-conformational-stability-of-cytochrome-c
#27
JOURNAL ARTICLE
Deepak Chahar, Indrani Jha, Jayamani Arumugam, Pannuru Venkatesu
Nanotechnology has advanced significantly; however, little is known about the potential implications on human health-related issues, particularly blood carrying enzymes. Ionic liquids are also well-recognized for maintaining the structure and activity of enzymes. In this regard, we delineate a facile synthetic approach of preparation of Fe3 O4 nanoparticles (NPs) as well as choline hydroxide [CH][OH] ionic liquid (IL)-supported Fe3 O4 NPs (Fe3 O4 -CHOH). This approach of combining magnetic nanoparticles (MNPs) with IL results in distinctive properties, which may offer enormous utility in the field of biomedical research due to the effortless separation of MNPs by an external magnetic field...
January 23, 2024: ACS Applied Bio Materials
https://read.qxmd.com/read/38261084/mechanically-stirred-enzymatic-membrane-reactor-containing-hrp-immobilized-on-tau-sio-2-fe-3-o-4-go-nanocomposite-for-removal-of-tetracycline-in-synthetically-concocted-wastewater
#28
JOURNAL ARTICLE
Monireh Besharati Vineh, Amir Ali Poostchi, Davood Kordestani, Mahmoud Karami Qushehbolagh, Ali Akbar Saboury
The process of mechanically stirred membrane reactor containing the suspension of horseradish peroxidase (HRP) immobilized on synthesized nanocomposite (Tau-SiO2 @Fe3 O4 -GO) was designed for continuous degradation of tetracycline. The immobilized HRP was characterized in terms of kinetic parameters and catalytic activities as these parameters were improved highly through immobilization. The stability indices including pH and temperature were investigated in parallel. The immobilized HRP was more tolerable to pH changes as compared to free HRP and the optimum temperature obtained at 40 °C...
January 23, 2024: Biodegradation
https://read.qxmd.com/read/38256006/the-influence-of-graphene-oxide-fe-3-o-4-differently-conjugated-with-10-hydroxycampthotecin-and-a-rotating-magnetic-field-on-adenocarcinoma-cells
#29
JOURNAL ARTICLE
Magdalena Jedrzejczak-Silicka, Karolina Szymańska, Ewa Mijowska, Rafał Rakoczy
Nanoparticles (e.g., graphene oxide, graphene oxide-Fe3 O4 nanocomposite or hexagonal boron nitride) loaded with anti-cancer drugs and targeted at cancerous cells allowed researchers to determine the most effective in vitro conditions for anticancer treatment. For this reason, the main propose of the present study was to determine the effect of graphene oxide (GO) with iron oxide (Fe3 O4 ) nanoparticles (GO-Fe3 O4 ) covalently (c-GO-Fe3 O4 -HCPT) and non-covalently (nc-GO-Fe3 O4 -HCPT) conjugated with hydroxycamptothecin (HCPT) in the presence of a rotating magnetic field (RMF) on relative cell viability using the MCF-7 breast cancer cell line...
January 11, 2024: International Journal of Molecular Sciences
https://read.qxmd.com/read/38251140/core-shell-fe-3-o-4-c-nanoparticles-as-highly-effective-t-2-magnetic-resonance-imaging-contrast-agents-in-vitro-and-in-vivo-studies
#30
JOURNAL ARTICLE
Huan Yue, Dejun Zhao, Tirusew Tegafaw, Mohammad Yaseen Ahmad, Abdullah Khamis Ali Al Saidi, Ying Liu, Hyunsil Cha, Byeong Woo Yang, Kwon Seok Chae, Sung-Wook Nam, Yongmin Chang, Gang Ho Lee
Magnetite nanoparticles (Fe3 O4 NPs) have been intensively investigated because of their potential biomedical applications due to their high saturation magnetization. In this study, core-shell Fe3 O4 @C NPs (core = Fe3 O4 NPs and shell = amorphous carbons, davg = 35.1 nm) were synthesized in an aqueous solution. Carbon coating terminated with hydrophilic -OH and -COOH groups imparted excellent biocompatibility and hydrophilicity to the NPs, making them suitable for biomedical applications. The Fe3 O4 @C NPs exhibited ideal relaxometric properties for T2 magnetic resonance imaging (MRI) contrast agents (i...
January 12, 2024: Nanomaterials
https://read.qxmd.com/read/38251114/preparation-of-fe-fe-3-o-4-znfe-2-o-4-powders-and-their-consolidation-via-hybrid-cold-sintering-spark-plasma-sintering
#31
JOURNAL ARTICLE
Amalia Mesaros, Bogdan Viorel Neamțu, Traian Florin Marinca, Florin Popa, Gabriela Cupa, Otilia Ruxandra Vasile, Ionel Chicinaș
Our study is focused on optimizing the synthesis conditions for the in situ oxidation of Fe particles to produce Fe@Fe3 O4 core-shell powder and preparation via co-precipitation of ZnFe2 O4 nanoparticles to produce Fe@Fe3 O4 /ZnFe2 O4 soft magnetic composites (SMC) through a hybrid cold-sintering/spark plasma-sintering technique. XRD and FTIR measurements confirmed the formation of a nanocrystalline oxide layer on the surface of Fe powder and the nanosized nature of ZnFe2 O4 nanoparticles. SEM-EDX investigations revealed that the oxidic phase of our composite was distributed on the surface of the Fe particles, forming a quasi-continuous matrix...
January 10, 2024: Nanomaterials
https://read.qxmd.com/read/38250997/safe-disposal-of-accident-wastewater-in-chemical-industrial-parks-using-non-thermal-plasma-with-zno-fe-3-o-4-composites
#32
JOURNAL ARTICLE
Aihua Li, Chaofei Wang, Chengjiang Qian, Jinfeng Wen, He Guo
Chemical wastewater has a high concentration of toxic and hazardous antibiotic pollutants, which not only devastates the ecological environment and disrupts the ecological balance, but also endangers human health. This research proposed a non-thermal plasma (NTP) combined with a ZnO-Fe3 O4 nano-catalyst system to achieve the efficient degradation of ciprofloxacin (CIP) in chemical wastewater. Firstly, ZnO-Fe3 O4 composite materials were prepared using hydrothermal method and characterized with scanning electron microscopy (SEM), transmission electron microscope (TEM), X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), etc...
January 4, 2024: Toxics
https://read.qxmd.com/read/38248403/one-pot-crispr-cas12a-based-viral-dna-detection-via-hrp-enriched-extended-ssdna-modified-au-fe-3-o-4-nanoparticles
#33
JOURNAL ARTICLE
Dong Hyeok Park, Izzati Haizan, Min Ju Ahn, Min Yu Choi, Min Jung Kim, Jin-Ha Choi
In the context of virus outbreaks, the need for early and accurate diagnosis has become increasingly urgent. In addition to being crucial for effective disease control, timely and precise detection of viral infections is also necessary for the implementation of essential public health measures, especially during pandemics. Among these measures, point-of-care testing (POCT) stands out as a powerful approach with the potential to revolutionize the landscape of viral diagnosis. In this study, we developed a one-pot clustered regularly interspaced short palindromic repeats (CRISPR)-Cas12a-based viral DNA detection system tailored for POCT; this method utilizes multi-enzyme-modified Au@Fe3 O4 nanoparticles...
January 2, 2024: Biosensors
https://read.qxmd.com/read/38246979/green-synthesis-of-silver-and-iron-oxide-nanoparticles-mediated-photothermal-effects-on-blastocystis-hominis
#34
JOURNAL ARTICLE
Shaimaa M I Alexeree, Hanan M Abou-Seri, Hala E Shams El-Din, Doaa Youssef, Marwa A Ramadan
The evolution of parasite resistance to antiparasitic agents has become a serious health issue indicating a critical and pressing need to develop new therapeutics that can conquer drug resistance. Nanoparticles are novel, promising emerging drug carriers that have demonstrated efficiency in treating many parasitic diseases. Lately, attention has been drawn to a broad-spectrum nanoparticle capable of converting absorbed light into heat via the photothermal effect phenomenon. The present study is the first to assess the effect of silver nanoparticles (Ag NPs) and iron oxide nanoparticles (Fe3 O4 NPs) as sole agents and with the combined action of the light-emitting diode (LED) on Blastocystis hominins (B...
January 22, 2024: Lasers in Medical Science
https://read.qxmd.com/read/38231559/synthesis-of-hierarchical-cf-fe-3-o-4-fibers-decorated-with-mos-2-layers-forming-core-sheath-microstructure-toward-tunable-and-efficient-electromagnetic-wave-absorption
#35
JOURNAL ARTICLE
Xiaopeng Han, Huiwu Cai, Guangheng Wang, Shuai Zhang, Xudong Liu, Ying Huang
Hierarchical structural design has been verified as a feasible strategy to fabricate effective electromagnetic wave (EMW) absorbers, so we designed hierarchical core-sheath composites with magnetic particles and dielectric layers. In this work, a hierarchical structure of carbon fiber (CF)@Fe3 O4 @MoS2 (CPDF7-M) was prepared by introducing Fe3 O4 and depositing MoS2 layers on the surface of fibers. Due to the synergistic effects from the CF@Fe3 O4 increasing the conductive and magnetic loss and the outer MoS2 layers improving the impedance matching, the optimal reflection loss ( R L ) value was -63...
January 17, 2024: ACS Applied Materials & Interfaces
https://read.qxmd.com/read/38226323/one-pot-derivatization-magnetic-solid-phase-extraction-coupled-with-liquid-chromatography-fluorescence-detection-for-the-rapid-determination-of-sulfonamide-residues-in-honey
#36
JOURNAL ARTICLE
Nian Shi, Yuwei Liu, Wenxuan Li, Shumei Yan, Lei Ma, Xia Xu, Di Chen
Consuming foods with excess sulfonamide residues threatens human health, underscoring the importance of their detection in food. This study presents an innovative one-pot derivatization/magnetic solid-phase extraction (OPD/MSPE) method for sulfonamides analysis. This approach integrates the derivatization and extraction steps into a single process. The sample solution, along with the derivatization reagent fluorescamine and the sorbent magnetic hydroxyl multi-walled carbon nanotubes, is mixed and vortexed for 3 min...
March 30, 2024: Food chemistry: X
https://read.qxmd.com/read/38215473/synthesis-of-fe3o4-core-mil-100-fe-shell-nanocomposites-for-tumor-chemo-ferroptosis-combination-therapy-and-mr-imaging
#37
JOURNAL ARTICLE
Antong Jiang, Teng Wang, Xiaoling Lu, Yuxiang Tian, Zihan Jiang, Bin Xu, Hanyuan Zhang, Weijun Fang
The application of both chemotherapy and ferrotherapy together has shown great potential in increasing the effectiveness of cancer treatment. To achieve such a combination, we herein have synthesized Fe3O4 core/MIL-100(Fe) shell nanocomposites (FM) that can be used for tumor chemo-ferroptosis combination therapy. In these nanocomposites, the anticancer drug 10-hydroxycamptothecin (HCPT) and iron ions could be co-delivered into tumors. On one hand, the released HCPT molecules can enter the cell nucleus and bind with DNA, resulting in induction of tumor cell apoptosis...
January 12, 2024: Biomedical Materials
https://read.qxmd.com/read/38211331/a-nudge-over-the-relaxation-plateau-effect-of-ph-particle-concentration-and-medium-viscosity-on-the-ac-induction-heating-efficiency-of-biocompatible-chitosan-coated-fe3o4-nanoparticles
#38
JOURNAL ARTICLE
Srujana Mahendravada, Barid Baran Lahiri, Fouzia Khan, A T Sathyanarayana, R Ezhil Vizhi, Anbalagan Moorthy, John Philip
The effect of pH, MNP concentration, and medium viscosity on the magnetic fluid hyperthermia (MFH) properties of chitosan-coated superparamagnetic Fe3O4 nanoparticles (MNPs) are probed here. Due to the protonation of the amide groups, the MNPs are colloidally stable at lower pH (~2), but form aggregates at higher pH (~ 8). The increased aggregate size at higher pH causes the Brownian relaxation time (τB) to increase, leading to a decrease in specific absorption rate (SAR). For colloidal conditions ensuring Brownian-dominated relaxation dynamics, an increase in MNP concentrations or medium viscosity is found to increase the τB...
January 11, 2024: Nanotechnology
https://read.qxmd.com/read/38207222/selective-and-controlled-release-responsive-nanoparticles-with-adsorption-pairing-synergy-for-anthocyanin-extraction
#39
JOURNAL ARTICLE
Xizhi Jiang, Min Wang, Zhichao Lou, He Han, Nina Yan, Qingbao Guan, Lei Xu
Anthocyanins with different structures have different anti-inflammatory and anti-cancer properties. Precise structural use can improve the chemopreventive effects of anthocyanins and enhance treatment outcomes because the anthocyanin structure influences its functional sites and activities. However, owing to the available variety of anthocyanins and their complex structures, the low matching of intermolecular forces between existing adsorbents and anthocyanins limits the targeted separation of anthocyanin monomers...
January 11, 2024: ACS Nano
https://read.qxmd.com/read/38202628/magnetic-persimmon-leaf-composite-preparation-and-application-in-magnetic-solid-phase-extraction-of-pesticides-in-water-samples
#40
JOURNAL ARTICLE
Yuyue Zang, Na Hang, Jiale Sui, Senlin Duan, Wanning Zhao, Jing Tao, Songqing Li
In recent years, the utilization of biomass materials for the removal and detection of water pollutants has garnered considerable attention. This study introduces, for the first time, the preparation of Fe3 O4 /persimmon leaf magnetic biomass composites. The magnetic composites were employed in a magnetic solid-phase extraction method, coupled with gas chromatography-electron capture detection (GC-ECD), for the analysis of four pesticides (trifluralin, triadimefon, permethrin, and fenvalerate) in environmental water samples...
December 20, 2023: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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