检索结果-内蒙古大学图书馆

Sulfur-inspired layered g-C 3 N 4 -incorporated NiFe 2 S 4 nanocomposite for electrochemical and real-time detection of vanillin in food samples

引用

Journal of the Taiwan Institute of Chemical Engineers 2025年 174卷

作者： Arun Tamilselvan Meenakumari Gopakumar Gopika Aravinth Karuppanan Beena Saraswathyamma Norah A. Albassami Mani Govindasamy Department of Physics SSN Research centre Sri Sivasubramaniya Nadar College of Engineering Kalavakkam Tamilnadu 603110 India International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of chemistry Amrita Vishwa Vidyapeetham Amritapuri Campus Clappana Kollam Kerala 690525 India Department of Chemistry Faculty of Science King Khalid University P.O.Box 9004 Abha 61413 Saudi Arabia Research Centre for Intelligent Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan

Background Vanillin is a widely used flavoring agent and plays a crucial role in food safety, making its accurate detection essential. developing sensitive and cost-effective methods for vanillin detection is vital for ensuring food quality and consumer protection. Methods This study introduces a novel sulfur-engineered g-C 3 N 4 /NiFe 2 S 4 nanocomposite synthesized via a simple and scalable method. The composite was employed to modify a glassy carbon electrode (GCE), significantly improving its electrochemical properties. Structural and morphological characterizations confirmed the successful integration of g-C 3 N 4 with NiFe 2 S 4 . differential pulse voltammetry (dPV) was conducted under optimized conditions (ph 7). Significant Findings The modified GCE exhibited a substantially enhanced oxidation peak current for vanillin, indicating superior electrocatalytic activity. The sensor achieved a wide linear detection range (0.01 - 360 µmol l -1 ), a low detection limit (0.00031 µmol l -1 ), and excellent selectivity, stability, repeatability, and reproducibility. Uniquely, the synergy between g-C 3 N 4 and NiFe 2 S 4 provided enhanced charge transfer and surface activity. Application of the sensor to real food samples including ice cream, wafers, and coffee demonstrated accurate recovery and practical feasibility, underscoring its potential as a reliable tool for food safety monitoring in real-world scenarios.

关键词： Electrochemical detection Food analysis G-c3n4 Health care Nanocomposite Nife2s4

来源：评论

学校读者我要写书评

暂无评论

Tailored nanoarchitectonics of PPy/g-C 3 N 4 /MnO 2 hybrid on NiCo LdH for enhanced energy storage in supercapacitors

引用

FlatChem 2025年 52卷

作者： Hariprasath Rangaraju Priyadharshini Matheswaran Pin-Yi Chen Nirmal Kumar Sakthivel Krishnamoorthy Shanmugaraj Pazhanivel Thangavelu Mani Govindasamy Department of Physics Periyar University Salem 636011 India Research Center for intelligent Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Institut de Recherche Dupuy de Lôme UMR CNRS 6027 Lorient 56100 France International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Mechanical Engineering Ming Chi University of Technology Taoyuan City 234303 Taiwan Departamento de Química Facultad de Ciencias Universidad de Tarapacá Avda. General Velásquez 1775 Arica Chile

The growing demand for efficient energy storage devices holding high specific energy has accelerated the search for advanced electrode materials. Transition metal-based layered double hydroxides (LdHs), particularly those containing nickel (Ni) and cobalt (Co), have emerged as promising candidates due to their tunable layered structure and chemical composition. In this study, LdH and its hybrids were prepared using a simple hydrothermal technique. In addition, X-ray diffraction (XRd) measurements approve the presence of H 2 O molecules and carbonate anions in the interlamellar space due to their extended interlayer spacing. The quaternary NiCo LdH/manganese dioxide (MnO₂)/polypyrrole (PPy)/graphitic carbon nitride (g-C₃N₄) hybrid nanocomposite exhibits a specific capacitance of 2389 F/g at 1 A/g, with 88 % retention after 5000 cycles at a higher current density of 10 A/g. The superior electrochemical performance is accredited to reduced aggregation and enhanced electronic conductivity. Charge storage kinetics were analysed using dunn's method and power law, reveals increased diffusive contribution in the quaternary nanocomposite. A hybrid supercapacitor device was fabricated using quaternary hybrid as cathode and activated carbon (AC) as anode delivers a high specific capacitance of 260 F/g at 1 A/g, with 95 % cyclic stability after 10,000 cycles. The assembled device achieves a specific energy of 82 Wh/kg at a specific power of 750 W/kg and a coulombic efficiency of 99 %, demonstrating excellent potential for energy storage applications.

关键词： dunn's method Polypyrrole Power law Transition LdH

来源：评论

学校读者我要写书评

暂无评论

design of an ultrasensitive electrochemical sensor using a carbon black/zinc-organic framework nanocomposite for quantifying quercetin in fruits

引用

Food Chemistry 2025年 491卷

作者： Arunkumar Selvam Gopika Meenakumari Gopakumar Chih-Yu Kuo Kareem Yusuf Beena Saraswathyamma Mani Govindasamy Department of Chemical Engineering and Biotechnology National Taipei University of Technology Taipei 10608 Taiwan International Graduate Program in Energy and Optoelectronic Materials (EOMP) National Taipei University of Technology Taipei 10608 Taiwan Department of Chemistry Amrita Vishwa Vidyapeetham Amritapuri Campus Clappana P O Kollam Kerala 690525 India High-Value Biomaterials Research and Commercialization Center National Taipei University of Technology Taipei 106 Taiwan Department of Chemistry College of Science King Saud University Riyadh 11451 Saudi Arabia International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Department of Chemistry Korea University Seongbuk-gu Seoul Republic of Korea

Quercetin, a potent flavonoid recognized for its antioxidant and anti-inflammatory attributes, is abundantly found in fruits and vegetables, considerably enhancing their health benefits. Monitoring quercetin concentrations in food matrices is crucial for quality assurance, nutritional assessment, and substantiating health claims. We report a unique zinc-based metal–organic framework (Zn-MOF) incorporated with carbon black (CB) to create a highly sensitive electrochemical sensor specifically designed for quercetin detection. The distinctive porous architecture of the Zn-MOF, together with the superior conductivity of carbon black, have a synergistic effect that improves electron transfer. The sensor reports a wide linear range of 0.05–350.9 μM and a lowest detection limit of 3.7 nM. Furthermore, Zn-MOF@CB/GCE demonstrates excellent current retention (95.64 %) over a period of one month, together with commendable repeatability and reproducibility. The real-sample study of the proposed sensor demonstrates an effective recovery range for fruits: apple (95.0–99.0 %), grapes (96.0–98.0 %), and guava (97.0–101.0 %).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Highly efficient capture of E. coli using amidoximated polyacrylonitrile nanofiber membrane immobilized with reactive green 19 dye/polyhexamethylene biguanide: Antibacterial and cytotoxicity studies

引用

Separation and Purification technology 2024年 338卷

作者： Quang-Vinh Le Bing-Lan Liu Penjit Srinophakun Jeng-Ywan Shih Chi-Yun Wang Chen‑Yaw Chiu Shen-Long Tsai Kuei-Hsiang Chen Yu-Kaung Chang Department of Chemical Engineering National Taiwan University of Science and Technology Taipei City 10607 Taiwan Department of Applied Chemistry Chaoyang University of Technology Taichung 413310 Taiwan Department of Chemical Engineering Kasetsart University 50 Ngamwongwan Road Chatuchak Bangkok 10900 Thailand Department of Chemical Engineering Ming Chi University of Technology New Taipei City 243303 Taiwan International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Bone and Joint Research Centre Chang Gung Memorial Hospital Taoyuan City 333423 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Zhongli Dist. Taoyuan City 320315 Taiwan

In this study, we synthesized an amidoximated polyacrylonitrile nanofiber membrane (P-Oxime). Subsequently, we grafted reactive green 19 (RG19) dye onto its surface, resulting in the formation of the P-Oxime-RG19 membrane. Further enhancement was achieved by physically attaching poly(hexamethylene biguanide) hydrochloride (phMB) to the P-Oxime-RG19 membrane, leading to the formation of the P-Oxime-RG19-phMB membrane. Extensive characterization of the nanofiber membranes was conducted, focusing on crucial physical and mechanical properties such as functional group content, morphology, and thermostability. The optimization of various modification conditions, including initial dye and phMB concentrations, duration, temperature, and nitrile group conversion to oxime concentrations, played a pivotal role in achieving superior antibacterial performance in P-Oxime-RG19-phMB nanofiber membranes. In-depth analyses involved the application of kinetic and equilibrium thermodynamic models to unravel the modification processes of RG19 dye and phMB in the nanofiber membranes. Under the carefully tuned optimal modification conditions, the P-Oxime-RG19-phMB nanofiber membrane exhibited remarkable antibacterial efficacy, achieving nearly 100% disinfection of E. coli . In addition to exploring its antimicrobial capabilities, we thoroughly examined the repeatability and biocompatibility of the nanofiber membranes. The results indicated not only the P-Oxime-RG19-phMB nanofiber membrane was a highly promising antibacterial material but also highlighted its potential for diverse applications, particularly in food and textile fabrication, owing to its exceptional performance and suitability.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Bioactive phytol from Thymus vulgaris, a promising source of alternative medicine to combat blaKPC and blaOXA-48 genotypes of Klebsiella pneumoniae: A retrospective in vitro and in silico approach

引用

Microbial pathogenesis 2025年 206卷

作者： Shibasini Murugan Vijay Karuppiah Sangavi Pandi Mani Govindasamy Kavitha Thangavel Department of Microbiology Science Campus Alagappa University Karaikudi Tamil Nadu India. Department of Microbiology Thiagarajar College (An Autonomous institution affiliated to Madurai Kamaraj University) Madurai Tamil Nadu India. Department of Bioinformatics Science Campus Alagappa University Karaikudi Tamil Nadu India Department of Microbiology Center for Bioinformatics Karpagam Academy of Higher Education Coimbatore Tamil Nadu 641 021 India. International Ph.D program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Science and Technology New Taipei City 24303 Taiwan. Electronic address: govindasamy420700@***. Department of Microbiology Science Campus Alagappa University Karaikudi Tamil Nadu India. Electronic address: kavithat@alagappauniversity.ac.in.

Carbapenem-resistant Klebsiella pneumoniae (CRKP) poses a significant public health challenge due to its multidrug resistance and limited treatment options. This study investigates the antibacterial potential of Thymus vulgaris ethanolic extract and its bioactive compounds against multidrug-resistant K. pneumoniae strains harboring blaKPC and blaOXA-48 carbapenemase genes. The presence of these resistance genes was confirmed by multiplex PCR. The extract exhibited a dose-dependent inhibitory effect, with a maximum inhibition zone of 18 ± 1.5 mm at 100 μg. Chromatographic techniques, including thin-layer chromatography (TLC) and column chromatography, yielded six fractions, among which fraction F3 showed the strongest antibacterial activity. Gas chromatography-mass spectrometry (GC-MS) and ultra-performance liquid chromatography (UPLC) analyses identified phytol as the predominant bioactive constituent. Further evaluation of phytol revealed a minimum inhibitory concentration (MIC) of 125 μg/mL and a minimum bactericidal concentration (MBC) of 250 μg/mL against CRKP. Alamar Blue viability assays and bacterial culture confirmed phytol's bacteriostatic and bactericidal effects, independent of the ethanol solvent. These findings suggest that phytol inhibits bacterial growth, possibly through membrane-targeting mechanisms. Notably, this study is among the first to comprehensively assess phytol's efficacy against carbapenem-resistant K. pneumoniae strains carrying blaKPC and blaOXA-48 genes, integrating molecular characterization, chromatographic purification and antimicrobial activity. Overall, the results highlight phytol as a promising natural agent to combat multidrug-resistant bacterial infections and address the urgent global threat of antibiotic resistance.

关键词： Klebsiella pneumoniae phytol Thymus vulgaris antibacterials carbapenem-resistant enterobacteriacae molecular docking

来源：评论

学校读者我要写书评

暂无评论

Time synchronization between parietal–frontocentral connectivity with MRCP and gait in post-stroke bipedal tasks

引用

Journal of Neuroengineering and Rehabilitation 2024年第1期21卷 101页

作者： phang, Chun-Ren Su, Kai-Hsiang Cheng, Yuan-Yang Chen, Chia-Hsin Ko, Li-Wei International Ph.D. Program in Interdisciplinary Neuroscience (UST) College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B) College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Biological Science and Technology College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Physical Medicine and Rehabilitation Taichung Veterans General Hospital Taichung Taiwan Department of Post-Baccalaureate Medicine College of Medicine National Chung Hsing University Taichung Taiwan School of Medicine National Yang Ming Chiao Tung University Taipei Taiwan Department of Physical Medicine and Rehabilitation Kaohsiung Medical University Hospital Kaohsiung Taiwan School of Medicine College of Medicine Kaohsiung Medical University Kaohsiung Taiwan Regenerative Medicine and Cell Therapy Research Center Kaohsiung Medical University Kaohsiung Taiwan Institute of Electrical and Control Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Department of Biomedical Science and Environment Biology Kaohsiung Medical University Kaohsiung Taiwan Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung Taiwan

Background: In post-stroke rehabilitation, functional connectivity (FC), motor-related cortical potential (MRCP), and gait activities are common measures related to recovery outcomes. However, the interrelationship between FC, MRCP, gait activities, and bipedal distinguishability have yet to be investigated. Methods: Ten participants were equipped with EEG devices and inertial measurement units (IMUs) while performing lower limb motor preparation (MP) and motor execution (ME) tasks. MRCP, FCs, and bipedal distinguishability were extracted from the EEG signals, while the change in knee degree during the ME phase was calculated from the gait data. FCs were analyzed with pairwise Pearson’s correlation, and the brain-wide FC was fed into support vector machine (SVM) for bipedal classification. Results: Parietal–frontocentral connectivity (PFCC) dysconnection and MRCP desynchronization were related to the MP and ME phases, respectively. Hemiplegic limb movement exhibited higher PFCC strength than nonhemiplegic limb movement. Bipedal classification had a short-lived peak of 75.1% in the pre-movement phase. These results contribute to a better understanding of the neurophysiological functions during motor tasks, with respect to localized MRCP and nonlocalized FC activities. The difference in PFCCs between both limbs could be a marker to understand the motor function of the brain of post-stroke patients. Conclusions: In this study, we discovered that PFCCs are temporally dependent on lower limb gait movement and MRCP. The PFCCs are also related to the lower limb motor performance of post-stroke patients. The detection of motor intentions allows the development of bipedal brain-controlled exoskeletons for lower limb active rehabilitation. © The Author(s) 2024.

关键词： Brain–computer interface Functional connectivity Motor execution Motor preparation Post-stroke

来源：评论

学校读者我要写书评

暂无评论

Correction to: Biological synthesis and characterization of iron oxide (FeO) nanoparticles using Pleurotus citrinopileatus extract and its biomedical applications

引用

Biomass Conversion and Biorefinery 2023年第11期14卷 12587-12587页

作者： Manimaran, Kumar Yanto, dede Heri Yuli Govindasamy, Mani Karunanithi, Bogeshwaran Alasmary, Fatmah Ali Habab, Reem Abdulrahman Research Center for Applied Microbiology National Research and Innovation Agency (BRIN) Cibinong Republic of Indonesia Department of Product Development Institute of Biotechnology Saveetha School of Engineering Saveetha Institute of Medical and Technical Sciences (SIMATS) Chennai India Faculty International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City Taiwan Korea University Seongbuk-gu Republic of Korea Department of Research and Innovation Saveetha School of Engineering SIMATS Thandalam India Department of Petroleum Engineering Dhaanish Ahmed College of Engineering Chennai India Department of Chemistry College of Science King Saud University Riyadh Saudi Arabia

来源：评论

学校读者我要写书评

暂无评论

Integration of MRI and somatosensory evoked potentials facilitate diagnosis of spinal cord compression

引用

Scientific Reports 2023年第1期13卷 1-12页

作者： Sun, Shu-Pin phang, Chun-Ren Tzou, Shey-Cherng Chen, Chang-Mu Ko, Li-Wei International Ph.D. Program in Interdisciplinary Neuroscience (UST) College of Biological Science and Technology National Yang Ming Chiao Tung University 734 Engineering Bldg. 5 1001 Daxue Road Hsinchu 30010 Taiwan Department of Medical Research National Taiwan University Hospital Hsin-Chu Branch Hsinchu 300 Taiwan Institute of Molecular Medicine and Bioengineering National Yang Ming Chiao Tung University Hsinchu 300 Taiwan Department of Surgery College of Medicine and Hospital National Taiwan University No. 7 Zhongshan South Road Taipei 10002 Taiwan Center for Intelligent Drug Systems and Smart Bio-devices (IDS2B) College of Biological Science and Technology National Yang Ming Chiao Tung University Hsinchu 300 Taiwan Institute of Electrical and Control Engineering Department of Electronics and Electrical Engineering National Yang Ming Chiao Tung University Hsinchu 300 Taiwan Department of Biomedical Science and Environment Biology and the Drug Development and Value Creation Research Center Kaohsiung Medical University Kaohsiung 807 Taiwan

This study aimed to integrate magnetic resonance imaging (MRI) and related somatosensory evoked potential (SSEP) features to assist in the diagnosis of spinal cord compression (SCC). MRI scans were graded from 0 to 3 according to the changes in the subarachnoid space and scan signals to confirm differences in SCC levels. The amplitude, latency, and time–frequency analysis (TFA) power of preoperative SSEP features were extracted and the changes were used as standard judgments to detect neurological function changes. Then the patient distribution was quantified according to the SSEP feature changes under the same and different MRI compression grades. Significant differences were found in the amplitude and TFA power between MRI grades. We estimated three degrees of amplitude anomalies and power loss under each MRI grade and found the presence or absence of power loss occurs after abnormal changes in amplitude only. For SCC, few integrated approach combines the advantages of both MRI and evoked potentials. However, integrating the amplitude and TFA power changes of SSEP features with MRI grading can help in the diagnosis and speculate progression of SCC. © 2023, The Author(s).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Immobilization of poly(hexamethylene biguanide) to cellulose acetate- and cellulose-based nanofiber membranes for antibacterial and cytotoxic studies

引用

Biochemical engineering Journal 2024年 205卷

作者： dinh Thi My Huong Chi-Yun Wang Pin-Yi Chen Chien Wei Ooi Xue Er Crystal Thew Bing-Lan Liu Chen-Yaw Chiu Shen-Long Tsai Kuei-Hsiang Chen Yu-Kaung Chang Department Chemical Technology and Environment University of Technology and Education the University of Da Nang Da Nang City Viet Nam Department Chemical Engineering/ Graduate School of Biochemical Engineering Ming Chi University of Technology New Taipei City 243303 Taiwan Department Chemical Engineering National Taiwan University of Science and Technology Taipei City 10607 Taiwan International Ph.D. Program in Innovative Technology of Biomedical Engineering and Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Bone and Joint Research Centre Chang Gung Memorial Hospital Taoyuan City 333423 Taiwan Research Center for Intelligent Medical Devices Ming Chi University of Technology New Taipei City 243303 Taiwan Chemical Engineering Department School of Engineering Monash University Malaysia Jalan Lagoon Selatan Bandar Sunway Selangor 47500 Malaysia Advanced Engineering Platform School of Engineering Monash University Malaysia Jalan Lagoon Selatan 47500 Bandar Sunway Selangor Malaysia Department of Applied Chemistry Chaoyang University of Technology Taichung 413310 Taiwan Department of Chemical Engineering and Materials Science Yuan Ze University Zhongli Dist Taoyuan City 320315 Taiwan

To develop the environmental antibacterial membrane, the physical attachments of poly (hexamethylene biguanide) hydrochloride (phMB) on the cellulose acetate (CA) and regenerated cellulose (RC) electrospun nanofiber membranes were employed. The immobilization of phMB increased the antibacterial efficacy ( AE , %) of nanofiber membranes from 65.67% to approximately 86.13% for CA-phMB and from 35.09% to approximately 100% for RC-phMB. The results of the chemical and physical characteristics indicate that the degree of deacetylation of CA nanofiber, the surface charge of the nanofiber, and the density of phMB immobilized onto the nanofiber primarily affect the antibacterial efficacy. The use of mathematical models, such as the Temkin equilibrium model for phMB immobilization and the Monod-type model for the relationship between antibacterial activity and immobilization density of phMB provides a deeper understanding of the interactions and kinetics involved. The rapid achievement of ∼100% AE after only 10 min of contact with Escherichia coli ( E. coli ) is a notable finding, indicating the quick and efficient antibacterial action of RC-phMB nanofiber membranes. Furthermore, maintaining approximately 100% AE after 20 days of storage underscores the long-term stability of phMB immobilized on RC nanofiber membranes. The findings suggest that RC-phMB holds great promise as an antibacterial material for biomedical applications, food packaging industries, and filtration or treatment of water.

关键词：

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：