Sensors International最新文献_第6页

Novel synthesis of Cu2ZnAl2O4 nanostructures for photocatalytic and electrochemical sensor applications 用于光催化和电化学传感器应用的新型Cu2ZnAl2O4纳米结构的合成

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100225

H.V. Harini , H.P. Nagaswarupa , Eneyew Tilahun Bekele , H.C. Ananda Murthy , C.R. Ravikumar

{"title":"Novel synthesis of Cu2ZnAl2O4 nanostructures for photocatalytic and electrochemical sensor applications","authors":"H.V. Harini , H.P. Nagaswarupa , Eneyew Tilahun Bekele , H.C. Ananda Murthy , C.R. Ravikumar","doi":"10.1016/j.sintl.2022.100225","DOIUrl":"https://doi.org/10.1016/j.sintl.2022.100225","url":null,"abstract":"<div><p>Hybrid nanostructured materials currently offer a potential approach for a variety of applications due to improvements in their physio-chemical characteristics. Techniques for XRD, TEM-HRTEM, SAED, and UV-DRS were used to characterize the Cu<sub>2</sub>ZnAl<sub>2</sub>O<sub>4</sub> (CZA) material. Without any secondary phases and with an average crystallite size of 40 nm, X-ray diffraction pattern examination demonstrates the increased crystalline structure. A highly crystalline, polydisperse CZA nanostructure was visible using TEM-HRTEM and SAED. The CZA nanostructure's light-absorbing behavior is presented by UV-DRS analysis, which found that the predicted bandgap energy was 5.0 eV. In this article, we describe an easy chemical synthesis of a hybrid CZA nanostructure that works well as a catalyst to break down the acid red 88 (AR-88) dye under UV, sunlight, and low light conditions. Additionally, it was studied to determine how to modify the working electrode's surface to enable the detection of lead and tin metal ions. With 93.1% of degradation and comparison work on decolorizing AR-88 dye in the presence of both sunlight and darkness, CZA nanostructure was looked at as a potential catalyst for the decolorization of AR-88 dye. By using graphite electrode paste and cyclic voltammetry to analyze the synthesized sample in 1 N KCl, it was discovered that it had outstanding redox reaction and lead and tin detection capabilities.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Development of a quartz crystal microbalance-based immunosensor for the early detection of mesothelin in cancer 用于癌症间皮素早期检测的石英晶体微天平免疫传感器的研制

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100248

Hem C. Joshi , Himanshu Kharkwal , Ajay Kumar , Piyush Kumar Gupta

{"title":"Development of a quartz crystal microbalance-based immunosensor for the early detection of mesothelin in cancer","authors":"Hem C. Joshi , Himanshu Kharkwal , Ajay Kumar , Piyush Kumar Gupta","doi":"10.1016/j.sintl.2023.100248","DOIUrl":"https://doi.org/10.1016/j.sintl.2023.100248","url":null,"abstract":"<div><p>A robust real-time flow injection assay using Quartz Crystal Microbalance (QCM) biosensor has been developed for the detection of mesothelin, an antigen expressed on various malignant tumors including mesothelioma and ovarian cancers. A QCM sensor chip functionalized with self-assembled monolayer of cysteamine used to fabricate a sensitive immunosensor. Mesothelin specific antibody was immobilized on cysteamine modified gold surface of quartz crystal using N-ethyl-N’-(3-dimethylaminopropyl) carbodiimide and N-hydroxy succinimide coupling. Further, ethanolamine was used as a blocking reagent to prevent the non-specific adsorption on antibody functionalized gold surface. Various concentrations of mesothelin was tested and the resonant frequency variation of the crystal was observed by a quartz crystal microbalance until a stable response is obtained. A good correlation between the frequency changes and concentration of mesothelin tested was observed and the QCM biosensor detects mesothelin in the linear range of 100pg/mLto 50 ng/mL. Thus, QCM assay could be a promising technique for early diagnosis of mesothelioma, ovarian and pancreatic adenocarcinoma.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Molecularly imprinted graphene based biosensor as effective tool for electrochemical sensing of uric acid 分子印迹石墨烯基生物传感器作为尿酸电化学传感的有效工具

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100243

Gowri Soman , Vandana M , Gurumurthy Hegde

{"title":"Molecularly imprinted graphene based biosensor as effective tool for electrochemical sensing of uric acid","authors":"Gowri Soman , Vandana M , Gurumurthy Hegde","doi":"10.1016/j.sintl.2023.100243","DOIUrl":"https://doi.org/10.1016/j.sintl.2023.100243","url":null,"abstract":"<div><p>Graphene oxide based molecularly imprinted polymer was designed by incorporating vinyltrimethoxysilane into the layers of graphene oxide, which was copolymerized with functional monomers such as Itaconic acid (IA) and methyl methacrylate (MMA) was developed via bulk imprinting technique. The prepared polymer was studied for selective sensing the uric acid (UA) in blood serum. The electrode was constructed by modifying bare glassy carbon electrodes with the prepared molecularly imprinted polymer (MIP) via drop cast method. Electrochemical measurements were made by Cyclic voltammetric (CV) and Differential Pulse Voltammetric (DPV) response of the sensor. The physical and chemical properties of the resultant material will be characterized by FTIR spectroscopy, XRD and FESEM. The constructed sensor showed a regression coefficient (R<sup>2</sup>) of 0.9302 with limit of detection (LOD) of about 0.565 μM. The developed sensor is reusable without any compromise in its selectivity. All the results confirm that the constructed biosensor requires no pre-treatment of samples and is suitable for real sample analysis.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Microwave exposure added characteristics to the wounding-induced variation potential of Aloe arborescens leaves 微波照射增加了木立芦荟叶片损伤诱导变异潜力的特征

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100241

Mudalige Don Hiranya Jayasanka Senavirathna

{"title":"Microwave exposure added characteristics to the wounding-induced variation potential of Aloe arborescens leaves","authors":"Mudalige Don Hiranya Jayasanka Senavirathna","doi":"10.1016/j.sintl.2023.100241","DOIUrl":"https://doi.org/10.1016/j.sintl.2023.100241","url":null,"abstract":"<div><p>The influence of radiofrequency electromagnetic radiation on the wounding-induced electric potentials (EPs) in <em>Aloe arborescens</em> plants was investigated. Burn wounding-induced electrical potentials of mature <em>A. arborescens</em> plants were observed under the exposure of 2.45 GHz, 3.5 GHz and 5.5 GHz microwaves at incident power density 1.5 ± 0.2 W m<sup>−2</sup>. Aloe leaves were subjected to flame wounding at the leaf tips and propagation EPs were recorded by inserting a glass Ag/AgCl microelectrode into the leaf pulp. The propagation of electrical potential and a standard deviation of the fluctuations in electrical potential (SDEF) were investigated. The flame wounding generated propagating characteristic electric potential, and the exposure of microwaves added extra characteristics to the signals by reversing the electrical potential temporally for a shorter duration. The characteristics appeared in the repolarization phase of the signal under 2.45 GHz and 3.5 GHz exposure; for the 5.5 GHz exposure, 3 out of 6 characteristics appeared during the depolarization phase. Averaged polarization rates of the characteristics were increased with the increased microwave frequency. Added characteristics to the electric potential may have resulted from a secondary signal triggered due to microwave exposure, which should be further studied. The repolarization and depolarization rates of the wound signals were not different between control and microwave exposures. SDEFs were also not affected by microwave exposure.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Grounded coplanar waveguide microstrip array antenna for 6G wireless networks 用于6G无线网络的接地共面波导微带阵列天线

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100228

Uri Nissanov (Nissan), Ghanshyam Singh

引用次数: 0

A new ensemble learning approach to detect malaria from microscopic red blood cell images 从微观红细胞图像中检测疟疾的一种新的集成学习方法

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100209

Mosabbir Bhuiyan , Md Saiful Islam

{"title":"A new ensemble learning approach to detect malaria from microscopic red blood cell images","authors":"Mosabbir Bhuiyan , Md Saiful Islam","doi":"10.1016/j.sintl.2022.100209","DOIUrl":"https://doi.org/10.1016/j.sintl.2022.100209","url":null,"abstract":"<div><p>Malaria is a life-threatening parasitic disease spread by infected female Anopheles mosquitoes. After analyzing it, microscopists detect this disease from the sample of microscopic red blood cell images. A professional microscopist is required to conduct the detection process, such an analysis may be time-consuming and provide low-quality results for large-scale diagnoses. This paper develops an ensemble learning-based deep learning model to identify malaria parasites from red blood cell images. VGG16(Retrained), VGG19(Retrained), and DenseNet201(Retrained) are three models that are used in developing the adaptive weighted average ensemble models. To reduce the dispersion of predictions, a max voting ensemble technique is then applied in combination with adaptive weighted average ensemble models. A variety of image processing techniques are utilized including the data augmentation technique to increase the number of data and solve the overfitting problem of the model. Some other approaches of custom CNN, Transfer Learning, and CNN-Machine Learning (ML) classifier techniques are also implemented for comparing their performance with the ensemble learning model. The proposed ensemble learning model provides the best performance among all with an accuracy of 97.92% to classify parasitized and uninfected cells. Therefore, the deep learning model has the potential to diagnose malaria more accurately and automatically.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Potentiometric determination of anti–epileptic drugs: A mini review 抗癫痫药物的电位测定：综述

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100224

Oguz Özbek , Onur Cem Altunoluk

引用次数: 0

A novel dual template molecularly imprinted modified pencil graphite electrode and assisting it by second-order calibration to construct a novel electronic device in advance for simultaneous determination of ferritin and transferrin 一种新的双模板分子印迹修饰铅笔石墨电极及其二阶校准辅助构建一种同时测定铁蛋白和转铁蛋白的新型电子装置

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2022.100205

Ali R. Jalalvand

{"title":"A novel dual template molecularly imprinted modified pencil graphite electrode and assisting it by second-order calibration to construct a novel electronic device in advance for simultaneous determination of ferritin and transferrin","authors":"Ali R. Jalalvand","doi":"10.1016/j.sintl.2022.100205","DOIUrl":"https://doi.org/10.1016/j.sintl.2022.100205","url":null,"abstract":"<div><p>This work introduced a novel electronic device for simultaneous determination of ferritin and transferrin in real matrices. Here, a pencil graphite electrode was chosen as a platform and its surface was modified with multiwalled carbon nanotubes-ionic liquid and electrochemically reduced fullerene-C<sub>60</sub>. Finally, the surface of the biosensor was modified by dual template molecularly imprinted polymers which were produced by electropolymerization of 2-amino-5-mercapto-1, 3, 4-thiadiazole, and ferritin and transferrin as template molecules. To generate a square wave voltammetric signal from the biosensor to simultaneous determination of ferritin and transferrin, it was incubated into a solution having ferritin and transferrin and then, it was immersed into an electrochemical probe solution. By incubation of the biosensor with ferritin and transferrin, the pathways within its molecularly imprinted polymer layer were occupied by ferritin and transferrin therefore, it was reasonable to observe decreasing of the height of its square wave voltammetric response. Because of the nature of the square wave voltammetric data (potential shifts), incubation of the biosensor with ferritin and transferrin produced two severely overlapped peaks while incubation of the biosensor with both of them generated a single peak. Therefore, for simultaneous determination of ferritin and transferrin, the biosensor was assisted by three-way calibration with the help of second-order square wave voltammetric data which helped me to develop a very efficient electronic device for simultaneous determination of ferritin (sensitivity: 6.5 μA nM<sup>−1</sup>, limit of detection: 0.01 nM) and transferrin (sensitivity: 6.1 μA nM<sup>−1</sup>, limit of detection: 0.012 nM) in serum samples whose performance was comparable with a reference method.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50172727","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Flexible sensors for mechatronic engineering education 用于机电工程教育的柔性传感器

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100236

Danyao Song , Xujun Chen , Meng Wang, Xinqing Xiao

引用次数: 3

Flange-type liquid-level sensor based on laser light reflection 基于激光反射的法兰式液位传感器

Sensors International Pub Date : 2023-01-01 DOI: 10.1016/j.sintl.2023.100230

Kouji Suemori , Yuichiro Komatsu , Taiki Nobeshima

引用次数: 0