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Design and evaluation of a calibration system for portable motor vehicle emission particle number detectors Instrum. Sci. Technol. (IF 1.6) Pub Date : 2024-03-14 Zhe Ji, Chengxiang Guo, Tongzhu Yu, Yixin Yang, Haotian Guo, Huaqiao Gui, Sheng Su, Jiguang Wang, Yan Ding, Jianguo Liu
The supervision of the number concentration of particles emitted from motor vehicles is becoming increasingly strict. The regular calibration of portable particle number (PN) detectors is a prerequ...
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Absolute intensity calibration of samples at variable sample to detector distances in small angle X-ray scattering (SAXS) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2024-02-29 Yueqian Fan, Rongchao Chen, Xiaoxia Shang, Haijuan Wu, Chunming Yang, Huiling Fan, Zhihong Li, Jiangang Chen, Dongfeng Li
Small angle X-ray scattering (SAXS) is a widely used physical technique to characterize nanoscale materials. The absolute scattering intensity provides quantitative data to characterize the mass an...
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Dual-grating waveguide coupler biosensor for the real-time determination of human immunoglobulin M (IgM) antibodies Instrum. Sci. Technol. (IF 1.6) Pub Date : 2024-02-15 Yu-Hsing Lai, Yan-Chang Lee, Hsun-Yuan Li, Wen-Hsin Hsieh
A dual-grating waveguide coupler biosensor was developed to detect human immunoglobulin M (IgM) antibodies with modification procedures using (3-aminopropyl)triethoxysilane (APTES) as the self-asse...
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Complete thermal characterization of liquids by front photopyroelectric configuration using the reference sample method Instrum. Sci. Technol. (IF 1.6) Pub Date : 2024-02-13 Vinicius Cruz-San Martin, Eder Contreras-Gallegos, Flavio Arturo Domínguez-Pacheco, Claudia Hernández-Aguilar, Alfredo Cruz-Orea
We explored the use of the front photopyroelectric (FPPE) configuration and the reference sample method to determine the thermal properties of liquid samples such as extra virgin olive oil and aque...
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Identification of fruit using a flexible tactile sensor array Instrum. Sci. Technol. (IF 1.6) Pub Date : 2024-01-25 Lihua Cai, Hongyao Chen, Xue Zuo, Yangyang Wei, Shuo Dong
This article aims to address the issue of low recognition accuracy in existing sorting robots caused by lighting, occlusion, and environmental factors. A fruit recognition method based on a flexibl...
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Fabrication of quartz microlenses using laser ablation Instrum. Sci. Technol. (IF 1.6) Pub Date : 2024-01-22 Muaath J. Mahmoud, Bassam G. Rasheed
Various quartz microlenses were fabricated in two stages with two lasers. A fiber laser at 1.06 µm was employed for the laser ablation, while a CO2 laser at 10.6 µm was used for direct laser writin...
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Comparison of two mechanical disaggregation methods of fresh lung tissues for extraction of high-quality RNA Instrum. Sci. Technol. (IF 1.6) Pub Date : 2024-01-19 Marcella Barbarino, Cristiana Bellan, Matilde Pesetti, Maria Bottaro, Caterina Tomassetti, Gaia Insinga, Sharon Burk, Felice Arcuri, Piero Paladini, Antonio Graziano, Antonio Giordano
Gene expression studies are widely used in medical, biological, and pharmaceutical research. Obtaining high-quality RNA from tissues is a prerequisite for high-quality data that should accurately r...
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Data acquisition in powder X-ray diffraction measurements using an area detector Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-12-23 Xu Zheng, Guangzhi Yin, Zhiyong Qiu, Tieying Yang, Xingyu Gao, Yueliang Gu, Xingmin Zhang, Xiaolong Li
Area detectors have been widely used in X-ray diffraction (XRD) to improve the acquisition speed and data quality. Here, an accurate, high efficiency, low distortion approach with a large angle ran...
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Enhancement of the signal-to-noise ratio by compressing the illumination of a spatial heterodyne Raman spectrometer Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-12-18 Yunfei Bai, Haiyan Luo, Zhiwei Li, Yi Ding, Qiansheng Wang, Wei Xiong
Improving the spectral signal-to-noise ratio is crucial for obtaining high-quality Raman spectra of target substances. To achieve a higher instrument signal-to-noise ratio in the development of spa...
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Dissolved oxygen sensor based upon quenching of single optical path fluorescence intensity Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-12-18 Qiong Yao, Yi-Zhuo Qian, Ji Xia, Shui-dong Xiong, Qi Wang
Dissolved oxygen concentration is one of the important indicators of water quality. In order to achieve low-cost and stable measurement of dissolved oxygen in water, this paper reported a single-op...
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Laser scanning cytometry: The future of conventional flow cytometry is past Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-12-14 Gabrielly Ribeiro, Dominik Lenz
Flow cytometry (FC) was developed in the late 1950s and is nowadays the gold standard for automated quantitative cellular analysis. In the early 1990s, a new generation of cytometry became commerci...
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Thin-core fiber-based Mach-Zehnder interferometer sensor for monitoring temperature, pressure, and humidity Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-12-14 Chuan-ju Hu, Chao Jiang, Li Li, Long-feng Deng, Jia-wei Gao, Si-mei Sun, Ting-shui Cao
A Mach-Zehnder interferometer (MZI) sensor based on thin-core fiber (TCF) is proposed. Sensitive materials such as polydimethylsiloxane (PDMS) or gelatin are coated on the surfaces of MZIs to achie...
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Piecewise modified Prandtl-Ishlinskii model for precise nano-positioning Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-12-12 Yu-liang Zhi, Jian-sheng Chen, Yu-chen Huang, Xin Wang, Xian-guang Fan
Piezoelectric ceramic, an indispensable micro-nano actuator, has advantages of small size, high sensitivity and strong controllability, which is widely applied in various fields like micro-nano pro...
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Automated multi-functional system for the characterization of plate valves in reciprocating compressors Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-12-11 Weilin Cui, Dexi Wang, Xiao Hong, Dajing Liu, Xiwen Cao
At present, there are two independent technologies and equipment for the test of the reciprocating compressor plate valve: the sealing test and blowing test. This method has single function and com...
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Effect of polydisperse aerosol slit and classified aerosol outlet widths on the performance of a cylindrical differential mobility analyzer Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-11-29 Xujuan Li, Angyang Cai, Mingzhou Yu, Wenge Zhang
The effects of polydisperse aerosol slit and classified aerosol outlet widths on the performance of a cylindrical differential mobility analyzer (DMA) were investigated using numerical simulations ...
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Electrochemical microfluidic chip composed of a cerium oxide-reduced graphene oxide nanocomposite screen printed carbon electrode (SPCE) for the determination of flunitrazepam Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-11-24 Garima, Ashwani Kumar, Abhay Sachdev
Due to its long-lasting tranquilizing effect on the human body, the abusive use of flunitrazepam (FNZ) in sexual assault and robbery is commonly encountered. In this study, the assembly of a hybrid...
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Automated Vickers hardness system with closed-loop control for polishing pads for semiconductor production Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-11-16 Le Nam Quoc Huy, Le Ngoc Quynh Hoa, Muhamad Amirul Haq, Tan-Thanh Huynh
Chemical mechanical polishing plays a pivotal role in enhancing the topography of wafers during semiconductor fabrication. The hardness of polishing pads holds great significance as it determines t...
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Characterization of a polyvinylidene fluoride (PVDF) nanofiber film coated with carbon nanotubes (CNTs) on a polyimide substrate by integrated experimental measurements and computational analysis Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-11-07 Yogeshwar Yadav, Parul Thapa, Shrutidhara Sarma
In this work, a strain sensor was fabricated using conductive electrospun polyvinylidene fluoride (PVDF) nanofiber film coated with carbon nanotubes (CNTs) on a polyimide (PI) substrate. An investi...
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Impact of the cloud zenith angle of the pickup coil upon the sensitivity of a flexible rosette eddy current sensor Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-11-07 Guolong Chen, Cang Lu, Le Fan, Ji Wei, Hao Wan, Gang Zhang, Yanlong Zhang, Guanyao Zhang
Bolt links and riveted joints, although widely used in aerospace and other mechanical systems, are susceptible to stress concentrations and fatigue cracks, which are undesirable. The flexible roset...
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Calibration and error analysis of an arc detector for wide-angle X-ray scattering (WAXS) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-11-10 Xiaoxia Shang, Rongchao Chen, Haijuan Wu, Yueqian Fan, Meijun Wang, Zhihong Li, Liping Chang, Jiangang Chen
In wide-angle X-ray scattering (WAXS) experiments, the use of a one-dimensional arc detector can effectively expand the angle range of collected diffraction or scattering signals. In practice, the ...
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Characterization of road surfaces using three near-infrared diode lasers Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-11-09 Yin Cheng, Jianguo Liu, Huaqiao Gui, Jiaoshi Zhang, Xiuli Wei
Rapid road network expansion has heightened the importance of surface condition information for traffic accident prevention and route optimization. This article introduces a laser diode-based senso...
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Development of a fog droplet sampler with multi-segment structure and specific temperature control Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-10-23 Liansi Sun, Yin Cheng, Jiaoshi Zhang, Dexia Wu, Jie Wang, Yixin Yang, Huaqiao Gui
Accurate and efficient sampling of fog droplets is a prerequisite for online measurement. The performance of such a sampler relies on the internal flow field, temperature, and humidity. Based on ae...
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Investigation and characterization of black crusts on limestone at historical buildings in the cities of İstanbul and Edirne (Turkey) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-10-11 Ali Yıldız, Ayşe Gülçin Küçükkaya, Esma Mıhlayanlar
The formation of black crust upon building stones and the resulting damage depend upon the fabric of the stone and atmospheric effects. The formation of black crust on limestone occurs more rapidly...
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Correction Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-10-16
Published in Instrumentation Science & Technology (Ahead of Print, 2023)
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Development of testing apparatus for investigating electromagnetic dynamics of contactors: A pilot study Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-10-03 Van Tu Duong, Quoc Minh Lam, Ngoc Anh Duy Hoang, Minh Tri Nguyen, Cong Toai Truong, Huy Hung Nguyen, Tan Tien Nguyen
It is easy to find electromagnetic contactors in modern electromechanical devices owing to their advantages, which encompass a simple structure, ease of use, and low cost. However, these devices al...
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Improved passive autofocus algorithm for fluorescence microscopy by non-parametric blurriness Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-09-06 Sungmin Kwon, Dongsoo Kim
Abstract In a fluorescence microscope, passive autofocus processing provides the best-focused cellular image in optical visualization during image collection. The steep focus curve is essential to high throughput microscopy for the application of cell images by reducing the number of stack image acquisitions to be focus-measured. The proposed scheme combines the non-parametric blur ratio computed by
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Signal drift modeling and analysis of an intelligent instrument using a multivariate adaptive regression splines technique Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-08-31 Cheng Qian, Hexiang Wang, Dezhen Yang, Yi Ren, Bo Sun, Zili Wang
Abstract Signal drift is an important failure mode of intelligent instruments under the combined effect of complex loading conditions and usually exhibits strongly nonlinear characteristics with a high degree of scatter. To solve this problem, this paper applies a multivariate adaptive regression splines (MARS) model to flexibly fit the nonlinear and highly inconsistent signal drifts of intelligent
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High-temperature determination of ammonia by tunable diode laser absorption spectroscopy (TDLAS) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-08-11 H. Cui, J. Li, F. Wang, G. Lv, W. Wang, J. Fan
Abstract Here is described an instrument for ammonia determination utilizing near-infrared laser absorption suitable for high-temperature applications. The laser wavelength is scanned across the ammonia absorption line at 1.512 µm and wavelength-modulation spectroscopy is simultaneously performed to provide robust and accurate measurements. The thermal effects and beam-steering effects are highlighted
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Determination of carcinoembryonic antigen (CEA) by surface plasmon resonance-enhanced total internal reflection ellipsometry (SPRe-TIRE) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-08-07 Aslı Erkal-Aytemur, Samet Şahin, Zafer Üstündağ, İbrahim Ender Mülazımoğlu, Mustafa Oguzhan Caglayan
A surface plasmon resonance-enhanced total internal reflection ellipsometric (SPRe-TIRE) aptasensor is reported for the determination of the carcinoembryonic antigen (CEA). A gold nanofilm-coated S...
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Monitoring of human dynamics by a flexible and comfortable polyvinylidene fluoride (PVDF) sensor Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-07-26 Hongying Tian, Lisheng Han, Xiangrong Wang, Huimin Hao, Kaili Zhao, Juanjuan Wu, Peiyuan Wang, Jiahai Huang
With the increasing demand for self-adaptive electronics, stretchable and conformable sensors with high sensitivity, stretchability, and self-adhesive are significant intelligent devices. Here a no...
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Temperature-compensated DC magnetic field sensor based upon a microcapillary resonator Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-07-18 Changqiu Yu, Xiaoxu Wang, Haibin Xu, Yuming Yan, Shiqi Hu, Zhonghai Zhang, Tiejun Zhou
A temperature-compensated direct current (DC) magnetic field sensor based on a whispering gallery mode (WGM) microcapillary resonator is described in which both temperature-compensation and magneti...
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Optical sensing of refractive index (RI) and temperature by dual-channel surface plasmon resonance (SPR) using two single-mode fibers (SMFs) and three multi-mode fibers (MMFs) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-07-10 Xin Yan, Taotao Hu, Tonglei Cheng, Rao Fu, Yang Zhao, Luo Wei, Haihui Li
A dual-channel surface plasmon resonance (SPR) sensor, based upon a multimode-single mode-multimode-single mode- multimode (MSMSM) fiber structure, is reported for the simultaneous measurement of t...
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Measurement of high-power transient electromagnetic pulse field with integrated photonic electric-field sensor Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-07-06 Xianli Li, Yi Cui, Gaolong Yao, Yongzhen Xi, Xiaoran Hai
To satisfy certain special requirements for high-power transient electromagnetic pulse (EMP) field measurements, such as high electric field intensity, broad bandwidth, fast rise time, and compact ...
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Determination of vancomycin in plasma with a magnetite amino silica adsorbent prepared from rice husks and high-performance liquid chromatography—tandem mass spectrometry (HPLC-MS/MS) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-06-24 Monireh Zamani-Kalajahi, Samin Hamidi, Mahboob Nemati, Mohammad Reza Siahi-Shadbad
A rapid and simple magnetic solid phase extraction-liquid chromatography-tandem mass spectrometry method is reported to determine vancomycin in human plasma. The Fe3O4@SiO2 nanocomposite was prepar...
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Characterization of the nanoparticle suspension by operando absorption spectrophotometry during sputtering onto liquids Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-06-21 S. Konstantinidis, F.-E. Bol, G. Savorianakis, P. Umek, A. Sergievskaya
Although the synthesis of nanoparticles (NPs) by low-pressure plasma-based sputtering onto liquids offers many advantages as compared to classic wet-chemistry-based approaches, not much is known ab...
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Novel electrochemical biosensor for Escherichia coli using gold-coated tungsten wires and antibody functionalized short multiwalled carbon nanotubes Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-06-15 Tahsin Ertaş, Bircan Dinç, Recep Üstünsoy, Hülya Eraslan, Ali Fuat Ergenç, Muhammet Bektaş
Rapid and easy detection of pathogens, especially bacteria, plays an important role in daily life in the face of increasing environmental pollution. Nanosensors focus on carbon nanotubes, which can...
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Iron oxide/poly(3,4-ethylenedioxythiophene): poly(styrene sulfonate) glassy carbon electrode as a novel label-free electrochemical microRNA-21 sensor Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-06-14 Cigdem Dulgerbaki, Aysegul Uygun Oksuz
MicroRNAs (miRNAs), a type of non-protein-coding and small RNAs, are encouraging molecular biomarkers for prior diagnosis of the certain diseases. Here, an electrochemical sensor based on iron oxid...
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Compact turnkey system for multi-contact diode lasers for portable spectroscopic applications Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-06-13 Bernd Sumpf, Lucas Wittenbecher, Thomas Filler, Daniel Bandke, Maria Krichler, André Müller, Kay Sowoidnich, Arnim Ginolas, Ulrike Winterwerber, Martin Maiwald
Diode laser-based light sources allow the implementation of features to meet specific application requirements. Besides output power and specific wavelength, this can also include spectral tunabili...
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Microreactor for the characterization of zeolite hydrothermal synthesis by small angle X-ray scattering (SAXS) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-06-06 Peng Xiao, Shiwei Cao, Qi Liu, Yafen Ge, Zikang Chen, Chengying Sun, Yanjun Gong, Zhihong Li
During zeolite synthesis, exploring the growth of nanoparticles is crucial for studying the crystallization mechanism. Synchrotron radiation small angle X-ray scattering (SAXS) is a powerful techni...
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Sequentially automated extraction of nucleic acids with magnetophoresis in microfluidic chips Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-06-06 M. Kashif Siddique, Ruizhi Lee, Songjing Li, Lin Sun
A microfluidic platform is reported that utilizes magnetophoresis for the sequential and automated extraction of nucleic acid from biological samples. The system incorporates multiple microfluidic ...
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Simultaneous determination of AC and DC magnetic field by a whispering gallery mode optical resonator Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-06-05 Changqiu Yu, Yuming Yan, Shiqi Hu, Xiaoxu Wang, Haibin Xu, Ziji Shao, Hai Li, Tiejun Zhou
Alternating current (AC) and direct current (DC) magnetic fields are monitored by an optical whispering gallery mode (WGM) microcapillary resonator filled with magnetostrictive material. The DC mag...
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Novel instrumentation for high-impedance electromotive force (EMF) measurements Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-05-17 Ajay Kumar Keshari, J. Prabhakar Rao, Rajesh Ganesan
Instrumentation is reported for measuring electromotive force (EMF) from a high-impedance solid electrolyte-based electrochemical cell. Generally, concentration galvanic cells are used to study the...
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Characterization of the middle and upper atmosphere temperatures by Rayleigh scattering Lidar Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-04-11 Zhiyuan Fang, Hao Yang, Cheng Li, Zhiqiang Kuang, Xiang Xu, Ruiyin Song, Heng Jin, Ming Zhao
The temperature plays a critical role in atmospheric research. A measurement system based on Rayleigh scattering Lidar was developed in this study to detect mid and upper-level atmospheric temperat...
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Performance evaluation of multiple particulate matter monitoring instruments under higher temperatures and relative humidity in Southeast Asia and design of an affordable monitoring instrument (ManPMS) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-03-31 Nam Duong Thanh, Hoa Tran Thi, Trung Nguyen Quang, Huy Nguyen Van, Giang Hoang Nguyen, Quyet Nguyen Huu, Tung Tran Son
Abstract The rapid industrialization of nations in Southeast Asia (SEA) has led to a decline in these countries’ air quality, including high levels of particulate matter (PM). Monitoring these air pollutants is crucial to understanding the pollution status of the area and developing management plans for improvement. The metrological conditions in the region present challenges as high temperature and
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Design and performance characterization of the time-of-flight liquid neutron reflectometer at the China spallation neutron source Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-03-29 Li-Ming Wang, Jianrong Zhou, Yanfeng Wang, Zhijia Sun, Fei Shen, Weiliang Cai, Guang Wang, Ming Tang, Rong Du, Lili Yan, Shenglan Chen, Haichuan Guo, Jun-Rong Zhang, Tian-Jiao Liang
The full design of a liquid neutron reflectometer for China spallation neutron source is reported. The horizontal sample geometry enables studies on both solid and liquid samples. A neutron beam wi...
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In situ characterization of human fingernails by optical front-face fluorescence for the identification of primary hypothyroidism Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-03-15 Mohamed Nakkach, Rihem Nouir, Imen Cherni, Mehdi Somaï, Fatma Daoued, Besma Ben Dhaou, Fatma Boussema, Sami Hamzaoui, Hassen Ghalila
Abstract Primary hypothyroidism is classified as a public health issue by the World Health Organization. The technique for diagnosing hypothyroidism is the measurement of thyroid stimulating hormone (TSH) and thyroxine (FT4). It is necessary to develop new methods that are more accessible, especially for developing countries. The aim of this work is the in-situ use of nail fluorescence for a simple
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Small, high temperature, wide-angle furnace for wide-angle X-ray scattering Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-03-08 Xiaoxia Shang, Weifeng Huang, Yueqian Fan, Haijuan Wu, Meijun Wang, Liping Chang, Dongfeng Li, Zhihong Li
Abstract Wide-angle X-ray scattering (WAXS) based upon synchrotron radiation is ideal for the in situ study of crystal structural changes during heating at high temperatures. This contribution describes a small furnace for in situ WAXS. The furnace has a wide coverage of scattered/diffracted angle from 0 to 135°, heats samples from room temperature to 1000 °C at 20 °C/min, and is suitable for in situ
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Highly selective sol-gel derived optical sensor using 2,6-dichlorophenolindophenol for the sensitive determination of aqueous iron(III) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-03-03 Abdollah Yari, A. Shiravandi, S. Moradi
Abstract The design and fabrication of a novel high-sensitivity optical sensor is reported that is highly selective for aqueous Fe3+. 2,6-Dichlorophenolindophenol is embedded in a film by the sol-gel method, which plays the role of the sensing element for Fe3+. The sensor selectively determined Fe(III) ion across a wide dynamic range from 1.70 × 10−8 to 3.31 × 10−3 M at pH 4.4 with a detection limit
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Sensitive monitoring of refractive index by surface plasmon resonance (SPR) with a gold α-iron (III) oxide thin film Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-03-01 Ke-Ke Zhang, Yu-Yang Wang, Qi Wang, Hao-Yue Wang, Yi-Zhuo Qian, Dian-Yun Zhang, Yan-Yan Xue, Shuai Li, Lei Zhang
Abstract In order to solve the problem that the optical fiber surface plasmon resonance (SPR) sensor is insufficiently sensitive for biomolecule detection, a novel sensing probe was proposed and designed, where the semiconductor material α-Fe2O3 was introduced for the first time. The α-Fe2O3 with high refractive index enhances the electric field and evanescent field depth at the interface between the
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Deep learning based force recognition using the specklegrams from multimode fiber Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-03-01 Jie Lu, Han Gao, Yuanyuan Liu, Haifeng Hu
Abstract The force induced variations of interferences in multimode fiber (MMF) are recognized by the output specklegrams. In this work, the classification of specklegrams is reported to identify the magnitude and position of the force applied on the MMF. The specklegrams from the MMF are recorded by a CCD camera at different force conditions. Because of the large number of transverse modes in the
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Development of a wireless passive capacitively coupled contactless conductivity detection (WPC4D) for fluidic flow detection utilizing 3D printing and PCB technologies Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-02-27 Bao-Anh Hoang, Van-Anh Bui, Kien Do Trung, Hang Bui Thu, Trinh Chu Duc, Tung Thanh Bui, Loc Do Quang
Abstract A modified capacitive-coupled contactless conductivity sensor is proposed and developed for microfluidic flow detection based on the passive wireless inductor-capacitor (LC) technique. The device utilizes rapid prototyping including PolyJet 3D printing and PCB technologies to fabricate the microchannel and the readout inductor through which the conductivity of the fluidic flow is analyzed
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Automated system for performing pH-based titrations Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-02-27 Naga P. D. Boppana, Robyn A. Snow, Paul S. Simone Jr., Gary L. Emmert, Michael A. Brown
Abstract Liquid delivery and endpoint determination during titrations may be problematic if an analyst does not have adequate training or formal education. This can lead to issues with method accuracy and precision. This work is focused on the development of a simple, low-cost, automated system capable of performing potentiometric titrations with a push of a button. A single-board computer (Raspberry
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Potentiometry lipid membrane based electronic tongue for the classification of mint in tea by principal component analysis (PCA) and linear discrimination analysis (LDA) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-01-17 Lazuardi Umar, Cory Nur Hafifah, Vira Annisa Rosandi, Moch. Rifqi Tamara, Haris Suhendar, Kuwat Triyana
Abstract The principles of the electronic tongue sensor include potentiometry using a type of electrode with a liquid junction design. Mint leaves are widely used in the industrial sector in food, beverage, and medicinal products. In the industrial sector there are obstacles in the quality control process when analyzing the content in beverage products, in which the tools are unable to accurately classify
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Determination of methane during anaerobic digestion by tunable diode laser absorption spectroscopy (TDLAS) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-01-12 Haibin Cui, Fei Wang, Shengyu Hu, Wenyuan Wang, Jinhui Fan
Abstract This paper presents the design and application of a near-infrared laser absorption-based sensor for methane measurements during anaerobic digestion using an optical probe inserted into an anaerobic tank reactor. The wavelength of the laser was scanned across the absorption lines of methane near 1.65 µm to provide the real-time concentration. A probe was designed for optical measurement. This
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Design and evaluation of a volatile particle remover combining hot dilution and a thermodenuder Instrum. Sci. Technol. (IF 1.6) Pub Date : 2023-01-09 Chengxiang Guo, Tongzhu Yu, Yixin Yang, Huaqiao Gui, Juntao Hu, Jianguo Liu
Abstract Portable and efficient removal of volatile particles from motor vehicle exhaust is essential for the accurate measurement of involatile solid particle number concentration in on-board emission measurement systems. For this purpose, a volatile particle remover with a combination of hot dilution and a thermodenuder (referred to as VPR-TD) was designed. The flow and temperature fields of the
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Highly sensitive temperature sensor based upon a multimode interference structure filled with an ethanol-glycerol solution Instrum. Sci. Technol. (IF 1.6) Pub Date : 2022-12-31 Xin Yan, Luo Wei, Rao Fu, Tonglei Cheng
Abstract A temperature sensor based upon a single mode - multimode-single mode – multimode - single mode (SMSMS) fiber structure is experimentally demonstrated. The SMSMS structure is covered by ethanol-glycerol solution, and changing the ratio of ethanol to glycerol changes the temperature sensitivity. A theoretical calculation was developed to characterize the influence of the ethanol-glycerol content
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Minimum cuboid estimation of irregular shape products for reducing box packaging waste by using vision-based measurement Instrum. Sci. Technol. (IF 1.6) Pub Date : 2022-12-29 Sungmin Kwon, Jimmy Kwon, Dongsoo Kim
Abstract Today packaging waste is a prevalent issue due to the increase in deliveries from online shopping. Here a new approach to this issue of cardboard box packaging waste is proposed by adapting an image processing algorithm based on camera vision-based measurement that computes the optimal cuboid bounding algorithm of irregular shape products. The end result is utilized so that packaging workers
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Characterization of the degradation of dipyrone (metamizole) in expired oral pharmaceutical products by Raman spectroscopy and principal component analysis (PCA) Instrum. Sci. Technol. (IF 1.6) Pub Date : 2022-12-22 Luciana Lopes Guimarães, Leandra Paula Marques de Sousa Rosa Nita, Walber Toma, Marcos Tadeu Tavares Pacheco, Landulfo Silveira
Abstract Stability studies are essential to ensure that a drug maintains its qualities after leaving the production line until the end of the validity date. This study aimed to identify the alterations related to shelf time in commercial formulations containing dipyrone (metamizole) and to model the shelf time by Raman spectroscopy (830 nm, 350 mW). Spectra of nine commercial medicines containing dipyrone
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Magnetic solid‐phase extraction of nickel(II) as the 2‐(5‐bromo‐2‐pyridilazo)‐5‐(diethylamino)phenol chelate on magnetite@methacrylic ester copolymer prior to high‐resolution–continuum source flame atomic absorption spectrometric detection Instrum. Sci. Technol. (IF 1.6) Pub Date : 2022-12-22 Mustafa Soylak, Ismail Ungur, Ozgur Ozalp
Abstract A Fe3O4@ Diaion HP‐2MG resin was used for separation-preconcentration and determination of trace Ni(II) as the 2‐(5‐bromo‐2‐pyridilazo)‐5‐(diethylamino)phenol (PADAP) chelate. Nickel determination was performed by high‐resolution–continuum source flame atomic absorption spectrometry (HR-CS FAAS). Among the parameters affecting the recoveries of Ni(II) on the Fe3O4@ Diaion HP-2MG, the pH, resin
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Hybrid spectrum conjugate gradient algorithm in electromagnetic tomography Instrum. Sci. Technol. (IF 1.6) Pub Date : 2022-12-06 Liu Li, Yue Luo, Qian Zhao, Zhanjun Wang
Abstract Electromagnetic tomography is a process detection technology based upon the principles of electromagnetic induction. The forward problem model and sensitivity distribution matrix of electromagnetic tomography are introduced as the basis of the inverse problem. The search direction and iterative parameters of the conjugate gradient algorithm are modified to improve the quality and convergence