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Analytica chimica acta : an international journal ... 12건

  1. [해외논문]   Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required   SCI SCIE


    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. OFC - OFC , 2018 , 0003-2670 ,

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  2. [해외논문]   Outside Front Cover - Journal name, Cover image, Volume issue details, ISSN, Cover Date, Elsevier Logo and Society Logo if required  


    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. OFC , 2018 , 0003-2670 ,

    초록

    원문보기

    원문보기
    무료다운로드 유료다운로드

    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  3. [해외논문]   Editorial Board   SCI SCIE


    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. ii - ii , 2018 , 0003-2670 ,

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  4. [해외논문]   Simultaneous detections of genetic fragment and single nucleotide mutation with a three-tiered output for tuberculosis diagnosis   SCI SCIE

    Huang, Shih-Ying (Department of Chemistry, Tunghai University, Taichung, 40704, Taiwan ) , Chang, Jia-Ru (National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, 35053, Taiwan ) , Liao, Yu-Chieh (Institute of Population Health Sciences, National Health Research Institutes, Zhunan, Miaoli, 35053, Taiwan ) , Dou, Horng-Yunn (National Institute of Infectious Diseases and Vaccinology, National Health Research Institutes, Zhunan, Miaoli, 35053, Taiwan ) , Chuang, Min-Chieh (Department of Chemistry, Tunghai University, Taichung, 40704, Taiwan)
    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. 1 - 9 , 2018 , 0003-2670 ,

    초록

    Abstract Tuberculosis (TB) remains one of the major infectious diseases worldwide. The pathogenic bacterium, Mycobacterium tuberculosis ( M.tb ), continuously evolves strains carrying drug-resistance genes, thus posing a growing challenge to TB prevention and treatment. We report a diagnostic system that uses a molecular beacon probe and an assistant strand as the core to simultaneously interact with an M.tb -specific fragment (in IS 6110 ) and a single nucleotide substitution (SNS)-encoded segment (in rpoB ) associated with drug resistance. A single fluorescent output in three-tiered levels was produced for combinatorial interpretations based on formation of a four-way DNA junction (4WJ). The SNS caused the 4WJ to partially dissociate, thus resulting in medium-level fluorescence. By contrast, high- and low-level fluorescence, represented the complete complementary complex and absence of either targeted fragments, respectively. Manipulating the length of the analyte-binding arm realized the medium output. The thermodynamics and kinetics of 4WJ construction were investigated to maximize the tiered-output performance. Biocatalytic amplification driven by the Klenow Fragment and Nt.AlwI was incorporated into the method to enhance the signal 64-fold and ensure long-term stability of the three-tiered output. The detection accuracy of the sensing system was verified using unpurified amplicons with templates of extracted DNA and boiled bacterial solutions. The tiered-output mechanism was usable at bacterial loads ranging from 4 × 10 0 to 4 × 10 3 CFU per reaction. The interference caused by nontuberculous mycobacteria was minimal. The results demonstrated the integrity of the sensing method as an alternative strategy for rapid screening of M.tb and detecting rifampin-resistance. Highlights A TB diagnostics was developed to analyze both M.tb -encoding gene and drug resistance-associated nucleotide mutation. A three-tiered fluorescent output was produced to effectively interpret the combinatorial scenarios. Satisfactory performance for differentiating between drug-susceptible and drug-resistant clinical isolates was obtained. Graphical abstract [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  5. [해외논문]   Additive Partial Least Squares for efficient modelling of independent variance sources demonstrated on practical case studies   SCI SCIE

    Luoma, Pekka (RECENDT –) , Natschlä (Research Center for Non-Destructive Testing, Altenbergerstrasse 69, Linz, Austria ) , ger, Thomas (SCCH –) , Malli, Birgit (Software Competence Center Hagenberg, Softwarepark 21, Hagenberg, Austria ) , Pawliczek, Marcin (SCCH –) , Brandstetter, Markus (Software Competence Center Hagenberg, Softwarepark 21, Hagenberg, Austria )
    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. 10 - 15 , 2018 , 0003-2670 ,

    초록

    Abstract A model recalibration method based on additive Partial Least Squares (PLS) regression is generalized for multi-adjustment scenarios of independent variance sources (referred to as additive PLS - aPLS ). aPLS allows for effortless model readjustment under changing measurement conditions and the combination of independent variance sources with the initial model by means of additive modelling. We demonstrate these distinguishing features on two NIR spectroscopic case-studies. In case study 1 aPLS was used as a readjustment method for an emerging offset. The achieved RMS error of prediction (1.91 a.u.) was of similar level as before the offset occurred (2.11 a.u.). In case-study 2 a calibration combining different variance sources was conducted. The achieved performance was of sufficient level with an absolute error being better than 0.8% of the mean concentration, therefore being able to compensate negative effects of two independent variance sources. The presented results show the applicability of the aPLS approach. The main advantages of the method are that the original model stays unadjusted and that the modelling is conducted on concrete changes in the spectra thus supporting efficient (in most cases straightforward) modelling. Additionally, the method is put into context of existing machine learning algorithms. Highlights Generalization of the additive PLS modelling approach for multi-adjustment scenarios. Additive PLS shown as fast and efficient recalibration method. Practical demonstration of the developed method on two industrial NIR case studies. Additive PLS put into context of the existing machine learning approach Generalized Additive Modelling . Graphical abstract [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  6. [해외논문]   A high resolution atmospheric pressure matrix-assisted laser desorption/ionization-quadrupole-orbitrap MS platform enables in situ analysis of biomolecules by multi-mode ionization and acquisition   SCI SCIE

    Chen, Bingming (School of Pharmacy, University of Wisconsin-Madison, Madison, WI, 53705, United States ) , OuYang, Chuanzi (Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53705, United States ) , Tian, Zichuan (Department of Chemistry, University of Wisconsin-Madison, Madison, WI, 53705, United States ) , Xu, Meng (Department of Biochemistry, University of Wisconsin-Madison, Madison, WI, 53705, United States ) , Li, Lingjun (School of Pharmacy, University of Wisconsin-Madison, Madison, WI, 53705, United States)
    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. 16 - 25 , 2018 , 0003-2670 ,

    초록

    Abstract Introduced in 2000, atmospheric pressure (AP)/matrix-assisted laser desorption/ionization (MALDI) has attracted substantial attention in the mass spectrometry community due to its ease of sample introduction and handling, interchangeability with ESI source and capability of analyzing volatile species. In this study, an AP/MALDI source with ultra-high spatial resolution was coupled to a Q Exactive HF orbitrap mass spectrometer for high resolution in situ analysis by MALDI, laserspray ionization (LSI) and matrix assisted ionization (MAI) without instrument modification. LSI and MAI generated multiply charged ions, which expanded the mass detection range and improved fragmentation efficiency. Full MS, targeted MS/MS, data dependent acquisition (DDA) and parallel reaction monitoring (PRM) acquisitions were performed on peptide and protein standards, tissue extracts and tissue sections for in depth characterization of various biomolecules. High resolution full MS and MS/MS images were obtained from crustacean and rat tissues with pixel size less than 30 μm. Overall, AP/MALDI-Q-Orbitrap is a fast scanning instrument that is capable of performing multiple types of ionization and multiple acquisition modes without instrument modification. This instrument platform provides an attractive alternative to other high resolution MALDI instruments. Highlights Multiple types of ionization techniques can be performed on the AP/MALDI-Q-Orbitrap platform. LSI and MAI on AP/MALDI-Q-Orbitrap expands m / z range and improves fragmentation efficiency. High resolution MSI has been performed in mass (240 K mass resolving power at m/z 200) and space ( Multiple acquisitions modes, including full MS, targeted MS/MS, DDA and PRM, allow in depth biomolecule analysis. Graphical abstract [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  7. [해외논문]   Single cell patterning for high throughput sub-cellular toxicity assay   SCI SCIE

    Xia, Junfei (Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA ) , Qiu, Yuting (Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA ) , Xun, Xiaojie (Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA ) , Ma, Liyuan (Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA ) , Guan, Jingjiao (Department of Chemical and Biomedical Engineering, Florida State University, Tallahassee, FL 32310, USA ) , Su, Ming (Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA)
    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. 26 - 32 , 2018 , 0003-2670 ,

    초록

    Abstract Cell population based toxicity assays cannot distinguish responses of single cells and sub-cellular organelles; while single cell assays are limited by low statistical power due to small number of cells examined. This article reports a new single cell array based toxicity assay, in which cell responses at population level, single cell level and sub-cellular level can be obtained simultaneously at high throughput. The single cell array was produced by microcontact printing and selected area cell attachment, and exposed to damaging X-ray radiation, which was followed by fluorescence imaging after staining. Two image processing softwares written in Python and MATLAB were used to determine the expressions of proteins associated with cell migration and invasion, and production of reactive oxygen species (ROS), respectively. The results showed significant differences in responses at single cell level and distinctive molecular heterogeneity at sub-cellular level in a large population of cells upon exposure to radiation. Highlights Single cell array is made by selective cell adhesion onto lithographically patterned surface. Population based toxicity, single cell toxicity, and subcellular toxicity are derived simultaneously at high throughput. Issues of cell overlapping and clustering are completely solved. Imaging software allowed for rapid, objective and automated extraction of toxicity information without user interference. Graphical abstract [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  8. [해외논문]   Rotational paper-based electrochemiluminescence immunodevices for sensitive and multiplexed detection of cancer biomarkers   SCI SCIE

    Sun, Xiange (Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China ) , Li, Bowei (Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China ) , Tian, Chunyuan (College of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, China ) , Yu, Fabiao (Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China ) , Zhou, Na (Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai 264003, China ) , Zhan, Yinghua (Yantai Xinhua Health Outpatient Department, Yantai 264003, China ) , Chen, Lingxin (Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Ya)
    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. 33 - 39 , 2018 , 0003-2670 ,

    초록

    Abstract This paper describes a novel rotational paper-based analytical device (RPAD) to implement multi-step electrochemiluminescence (ECL) immunoassays. The integrated paper-based rotational valves can be easily controlled by rotating paper discs manually and this advantage makes it user-friendly to untrained users to carry out the multi-step assays. In addition, the rotational valves are reusable and the response time can be shortened to several seconds, which promotes the rotational paper-based device to have great advantages in multi-step operations. Under the control of rotational valves, multi-step ECL immunoassays were conducted on the rotational device for the multiplexed detection of carcinoembryonic antigen (CEA) and prostate specific antigen (PSA). The rotational device exhibited excellent analytical performance for CEA and PSA, and they could be detected in the linear ranges of 0.1–100 ng mL −1 and 0.1–50 ng mL −1 with detection limits down to 0.07 ng mL −1 and 0.03 ng mL −1 , respectively, which were within the ranges of clinical concentrations. We hope this technique will open a new avenue for the fabrication of paper-based valves and provide potential application in clinical diagnostics. Highlights The novel rotational paper-based devices (RPADs) opened a new avenue for the fabrication of 3D paper-based devices. The integrated paper-based rotational valves could be easily operated in a simple, low-cost and user-friendly way. Multi-step ECL immunoassays were conducted for the detection of cancer biomarkers by the manipulation of rotational valves. Graphical abstract This paper describes a rotational paper-based analytical strategy to implement multi-step electrochemiluminescence immunoassay for cancer biomarkers. [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  9. [해외논문]   Citrate-capped silver nanoparticles as a probe for sensitive and selective colorimetric and spectrophotometric sensing of creatinine in human urine   SCI SCIE

    Alula, Melisew Tadele (College of Sciences, Department of Chemical and Forensic Sciences, Botswana International University of Science and Technology, Plot 10071, Private Bag 16, Palapye, Botswana ) , Karamchand, Leshern (Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, University of Cape Town, Cape Town 7925, South Africa ) , Hendricks, Nicolette R. (Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, University of Cape Town, Cape Town 7925, South Africa ) , Blackburn, Jonathan M. (Institute of Infectious Disease and Molecular Medicine, Department of Integrative Biomedical Sciences, University of Cape Town, Cape Town 7925, South Africa)
    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. 40 - 49 , 2018 , 0003-2670 ,

    초록

    Abstract Urinary creatinine concentration is a critical physiological parameter that enables reliable assessment of patient renal function and diagnosis of a broad spectrum of diseases. In this study, a simple and inexpensive sensor comprising monodisperse, citrate-capped silver nanoparticles (cc-AgNPs) was developed, which enabled rapid, sensitive and selective quantitation of creatinine directly in unprocessed urine. The mechanism of this sensor entails the creatinine-mediated aggregation of the cc-AgNPs (within 1 min) under alkaline conditions (pH 12). This is attributed to the tautomerization of creatinine to its amino anionic species at alkaline pH, which cross-link the cc-AgNPs via hydrogen bond networks with the negatively charged citrate caps. Creatinine elicited visibly-discernable color changes of the cc-AgNPs colloids in a concentration-dependent manner up to 10 μM. UV-visible spectroscopic analyses of the cc-AgNPs revealed that creatinine elicited a concentration-dependent decrease in intensity of the localized surface plasmon resonance (LSPR) band centered around 403 nm, with a concomitant increase in intensity of the red-shifted LSPR band at 670 nm. This observation denotes a creatinine-mediated increase in cc-AgNP particle size via aggregation, as confirmed by transmission electron microscopy analysis. The cc-AgNP sensor exhibited a linear correlation between the A 670 /A 403 extinction ratio and creatinine concentration range of 0–4.2 μM in aqueous solutions ( R 2 = 0.996), and a low detection limit of 53.4 nM. Hence, the simplicity, short assay time, and high sensitivity and selectivity of our cc-AgNP sensor affirms its utility as a creatinine monitoring assay for low-resource, point-of-care settings. Highlights A colorimetric, LSPR citrate-capped AgNPs (cc-AgNPs) sensor capable of selective quantitation of creatinine was developed. Creatinine induced concentration-dependent aggregation of cc-AgNPs at pH 12. Inorganic ions and organic molecules present in urine do not interfere with cc-AgNPs-assay of creatinine. The A 670 /A 403 extinction ratio of cc-AgNPs increased linearly in aqueous creatinine concentration range of 0–4.2 μM. A nanomolar urinary creatinine limit of detection (66 nM) was achieved with the cc-AgNPs assay. Graphical abstract [DISPLAY OMISSION]

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    회원님의 원문열람 권한에 따라 열람이 불가능 할 수 있으며 권한이 없는 경우 해당 사이트의 정책에 따라 회원가입 및 유료구매가 필요할 수 있습니다.이동하는 사이트에서의 모든 정보이용은 NDSL과 무관합니다.

    NDSL에서는 해당 원문을 복사서비스하고 있습니다. 아래의 원문복사신청 또는 장바구니담기를 통하여 원문복사서비스 이용이 가능합니다.

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  10. [해외논문]   Double-enhanced lateral flow immunoassay for potato virus X based on a combination of magnetic and gold nanoparticles   SCI SCIE

    Razo, Shyatesa C. (A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia ) , Panferov, Vasily G. (A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia ) , Safenkova, Irina V. (A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia ) , Varitsev, Yuri A. (A.G. Lorch All-Russian Potato Research Institute, Kraskovo-1, Moscow Region 140051, Russia ) , Zherdev, Anatoly V. (A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia ) , Dzantiev, Boris B. (A.N. Bach Institute of Biochemistry, Research Centre of Biotechnology of the Russian Academy of Sciences, Leninsky Prospect 33, 119071 Moscow, Russia)
    Analytica chimica acta : an international journal devoted to all branches of analytical chemistry v.1007 ,pp. 50 - 60 , 2018 , 0003-2670 ,

    초록

    Abstract This study presents the joint use of magnetic nanoparticles (MNPs) and gold nanoparticles (GNPs) for double enhancement in a lateral flow immunoassay (LFIA). The study realizes two types of enhancement: (1) increasing the concentration of analytes in the samples using conjugates of MNPs with specific antibodies and (2) increasing the visibility of the label through MNP aggregation caused by GNPs. The proposed strategy was implemented using a LFIA for potato virus X (PVX), a significant potato pathogen. MNPs conjugated with biotinylated antibodies specific to PVX and GNPs conjugated with streptavidin were synthesized and characterized. The LFIAs with and without the proposed enhancements were compared. The double-enhanced LFIA achieved the highest sensitivity, equal to 0.25 ng mL −1 and 32 times more sensitivity than the non-enhanced LFIA (detection limit: 8 ng mL −1 ). LFIAs using one of the types of amplification (magnetic concentration without GNPs-causing aggregation or MNP aggregation without the concentration stage) showed intermediate levels of sensitivity. The double-enhanced LFIA was successfully used for PVX detection in potato leaves. The results for PVX detection in the infected plants were similar for the double-enhanced LFIA developed and the conventional LFIA based on the GNP conjugates; however, the new system provided significant coloring enhancement. This study confirmed that a simple combination of MNPs and GNPs has great potential for high-sensitivity detection and could possibly be adopted for LFIAs of other compounds. Highlights Magnetic and gold nanoparticles (MNPs & GNPs) were used together in lateral flow immunoassay. Heteroaggregates of MNPs and GNPs increased the assay sensitivity. Combination of magnetic concentration and MNP & GNP aggregates had a cumulative effect. The double enhancement increased the sensitivity of potato virus Х detection by 32-fold. Graphical abstract [DISPLAY OMISSION]

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