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Article: Estimating the winter wheat harvest index with canopy hyperspectral remote sensing data based on the dynamic fraction of post-anthesis phase biomass accumulation

Zhang, Ningdan / Liu, Xingren / Ren, Jianqiang / Wu, Shangrong / Li, Fangjie

International journal of remote sensing. 2022 Mar. 19, v. 43, no. 6

2022

Abstract: Remote sensing-based crop harvest index (HI) information is of great significance for crop yield estimation, crop variety breeding and evaluation of crop cultivation effectiveness. The method for estimating HI using f G (fraction of post-anthesis phase ... ...

Abstract	Remote sensing-based crop harvest index (HI) information is of great significance for crop yield estimation, crop variety breeding and evaluation of crop cultivation effectiveness. The method for estimating HI using f G (fraction of post-anthesis phase biomass accumulation) has been widely used and shows good performance at the field scale, but the upscaled regional application of this method had not been achieved using remote sensing information. In this paper, a remote sensing method for estimating the dynamic harvest index (D-HI) based on the remote sensing-based dynamic f G (D-f G) was proposed to solve this problem and was verified based on D-f G and D-HI measurements. This approach was based on accurate D-f G parameters estimated by using the NDSI constructed from hyperspectral sensitive band centres. The results showed that the D-f G estimation, the overall verification accuracy of the D-HI estimation at different growth stages and the accuracy of the D-HI estimation in a single growth stage were highly accurate. In the overall D-HI estimation verification, the normalized root square mean error (NRMSE) was between 10.83% and 14.45%, and the mean relative error (MRE) was between 9.62% and 13.99%. At maturity, the D-HI estimation accuracy based on band centre λ (732 nm, 834 nm) was the highest, and the NRMSE and MRE were 9.62% and 9.27%, respectively. Based on these results, the proposed method is feasible and effective at accurately estimating the D-HI, thus providing a technical reference for the use of satellite remote sensing data to obtain regional crop HI information based on f G.
Keywords	biomass production ; canopy ; cultivars ; developmental stages ; harvest index ; satellites ; winter wheat
Language	English
Dates of publication	2022-0319
Size	p. 2029-2058.
Publishing place	Taylor & Francis
Document type	Article
ZDB-ID	1497529-4
ISSN	1366-5901 ; 0143-1161
ISSN (online)	1366-5901
ISSN	0143-1161
DOI	10.1080/01431161.2022.2054297
Database	NAL-Catalogue (AGRICOLA)

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Article: Comparison of Regional Winter Wheat Mapping Results from Different Similarity Measurement Indicators of NDVI Time Series and Their Optimized Thresholds

Li, Fangjie / Ren, Jianqiang / Wu, Shangrong / Zhao, Hongwei / Zhang, Ningdan

Remote Sensing. 2021 Mar. 18, v. 13, no. 6

2021

Abstract: Generally, there is an inconsistency between the total regional crop area that was obtained from remote sensing technology and the official statistical data on crop areas. When performing scale conversion and data aggregation of remote sensing-based crop ...

Abstract	Generally, there is an inconsistency between the total regional crop area that was obtained from remote sensing technology and the official statistical data on crop areas. When performing scale conversion and data aggregation of remote sensing-based crop mapping results from different administrative scales, it is difficult to obtain accurate crop planting area that match crop area statistics well at the corresponding administrative level. This problem affects the application of remote sensing-based crop mapping results. In order to solve the above problem, taking Fucheng County of Hebei Province in the Huanghuaihai Plain of China as the study area, based on the Sentinel-2 normalized difference vegetation index (NDVI) time series data covering the whole winter wheat growth period, the statistical data of the regional winter wheat planting area were regarded as reference for the winter wheat planting area extracted by remote sensing, and a new method for winter wheat mapping that is based on similarity measurement indicators and their threshold optimizations (WWM-SMITO) was proposed with the support of the shuffled complex evolution-University of Arizona (SCE-UA) global optimization algorithm. The accuracy of the regional winter wheat mapping results was verified, and accuracy comparisons with different similarity indicators were carried out. The results showed that the total area accuracy of the winter wheat area extraction by the proposed method reached over 99.99%, which achieved a consistency that was between the regional remote sensing-based winter wheat planting area and the statistical data on the winter wheat planting area. The crop recognition accuracy also reached a high level, which showed that the proposed method was effective and feasible. Moreover, in the accuracy comparison of crop mapping results based on six different similarity indicators, the winter wheat distribution that was extracted by root mean square error (RMSE) had the best recognition accuracy, and the overall accuracy and kappa coefficient were 94.5% and 0.8894, respectively. The overall accuracies of winter wheat that were extracted by similarity indicators, such as Euclidean distance (ED), Manhattan distance (MD), spectral angle mapping (SAM), and spectral correlation coefficient (SCC) were 94.1%, 93.9%, 93.3%, and 92.8%, respectively, and the kappa coefficients were 0.8815, 0.8776, 0.8657, and 0.8558, respectively. The accuracy of the winter wheat results extracted by the similarity indicator of dynamic time warping (DTW) was relatively low. The results of this paper could provide guidance and serve as a reference for the selection of similarity indicators in crop distribution extraction and for obtaining large-scale, long-term, and high-precision remote sensing-based information on a regional crop spatial distribution that is highly consistent with statistical crop area data.
Keywords	algorithms ; statistics ; time series analysis ; winter wheat ; Arizona ; China
Language	English
Dates of publication	2021-0318
Publishing place	Multidisciplinary Digital Publishing Institute
Document type	Article
Note	NAL-AP-2-clean
ZDB-ID	2513863-7
ISSN	2072-4292
ISSN	2072-4292
DOI	10.3390/rs13061162
Database	NAL-Catalogue (AGRICOLA)

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Article ; Online: Ultrasound-radiated synthesis of PAMAM-Au nanocomposites and its application on glucose biosensor.

Wei, Yinyin / Li, Ying / Zhang, Ningdan / Shi, Guoyue / Jin, Litong

Ultrasonics sonochemistry

2010 Volume 17, Issue 1, Page(s) 17–20

Abstract: Hybrid nanocomposites of carboxyl-terminated generation 4 (G 4) poly(amidoamine) dendrimers (PAMAM) with gold nanoparticles (AuNPs) encapsulated inside them were synthesized under ultrasound irradiation. The obtained nanocomposites were used to fabricate ...

Abstract	Hybrid nanocomposites of carboxyl-terminated generation 4 (G 4) poly(amidoamine) dendrimers (PAMAM) with gold nanoparticles (AuNPs) encapsulated inside them were synthesized under ultrasound irradiation. The obtained nanocomposites were used to fabricate highly sensitive amperometric glucose biosensor which exhibited a high and reproducible sensitivity of 2.9 mA/mM/cm(2), response time less than 5 s, linear dynamic range from 0.1 to 15.8 microM, correlation coefficient of R(2)=0.9988, and limit of detection (LOD), based on S/N ratio (S/N=3) of 0.05 microM. A value of 2.7 mM for the apparent Michaelis-Menten constant K(M)(app) was obtained. The high sensitivity, wider linear range, good reproducibility and stability make this biosensor a promising candidate for portable amperometric glucose biosensor.
MeSH term(s)	Biosensing Techniques/instrumentation ; Dendrimers ; Electrodes ; Enzymes, Immobilized/chemistry ; Enzymes, Immobilized/radiation effects ; Equipment Design ; Equipment Failure Analysis ; Glucose/analysis ; Glucose/chemistry ; Glucose Oxidase/chemistry ; Glucose Oxidase/ultrastructure ; Gold/chemistry ; Gold/radiation effects ; Materials Testing ; Nanostructures/chemistry ; Nanostructures/radiation effects ; Nanostructures/ultrastructure ; Particle Size ; Polyamines/chemistry ; Polyamines/radiation effects ; Sonication/methods
Chemical Substances	Dendrimers ; Enzymes, Immobilized ; PAMAM Starburst ; Polyamines ; Gold (7440-57-5) ; Glucose Oxidase (EC 1.1.3.4) ; Glucose (IY9XDZ35W2)
Language	English
Publishing date	2010-01
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1208333-1
ISSN	1873-2828 ; 1350-4177
ISSN (online)	1873-2828
ISSN	1350-4177
DOI	10.1016/j.ultsonch.2009.06.017
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Article: Label-free immunoassay for chloramphenicol based on hollow gold nanospheres/chitosan composite

Zhang, Ningdan / Xiao, Fei / Bai, Jing / Lai, Yanjun / Hou, Jie / Xian, Yuezhong / Jin, Litong

Talanta. 2011 Dec. 15, v. 87

2011

Abstract: A novel label-free electrochemical immunosensor for rapid determination of chloramphenicol (CAP) was fabricated by entrapping monoclonal antibody to chloramphenicol (anti-CAP) in hollow gold nanospheres (HGNs)/chitosan composite modified on a glassy ... ...

Abstract	A novel label-free electrochemical immunosensor for rapid determination of chloramphenicol (CAP) was fabricated by entrapping monoclonal antibody to chloramphenicol (anti-CAP) in hollow gold nanospheres (HGNs)/chitosan composite modified on a glassy carbon electrode. The hollow gold nanospheres (HGNs) were prepared by using Co nanoparticles as sacrificial templates and characterized by transmission electron microscopy (TEM). The changes of the electrode behavior after each fabrication step were investigated by electrochemical impedance spectroscopy (EIS) technique. Under optimal conditions, the proposed immunosensor has a sensitive response to CAP in a linear range of 0.1–1000ngmL⁻¹ with the detection limit of 0.06ngmL⁻¹. Accurate detection of CAP in real meat samples was demonstrated by comparison with conventional HPLC method. The proposed method was proven to be a feasible quantitative method for CAP analysis with the properties of simple preparation, stability, high sensitivity and selectivity.
Keywords	antibiotic residues ; chitosan ; chloramphenicol ; cobalt ; detection limit ; dielectric spectroscopy ; electrochemistry ; food contamination ; glassy carbon electrode ; gold ; high performance liquid chromatography ; immunoassays ; immunosensors ; meat ; monoclonal antibodies ; nanoparticles ; nanospheres ; quantitative analysis ; transmission electron microscopy
Language	English
Dates of publication	2011-1215
Size	p. 100-105.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1500969-5
ISSN	1873-3573 ; 0039-9140
ISSN (online)	1873-3573
ISSN	0039-9140
DOI	10.1016/j.talanta.2011.07.108
Database	NAL-Catalogue (AGRICOLA)

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Article: A monoclonal antibody-based immunosensor for detection of Sudan I using electrochemical impedance spectroscopy

Xiao, Fei / Zhang, Ningdan / Gu, Hongjie / Qian, Min / Bai, Jing / Zhang, Wen / Jin, Litong

Talanta. 2011 Mar. 15, v. 84, no. 1

2011

Abstract: Sudan I monoclonal antibodies (Mabs) were prepared by hybridoma technique and firstly used to develop a Sudan I immunosensor by immobilizing the Mabs on a gold electrode. o-Mercaptobenzoic acid (MBA) was covalently conjugated on the gold electrode to ... ...

Abstract	Sudan I monoclonal antibodies (Mabs) were prepared by hybridoma technique and firstly used to develop a Sudan I immunosensor by immobilizing the Mabs on a gold electrode. o-Mercaptobenzoic acid (MBA) was covalently conjugated on the gold electrode to form a self-assembled monolayer (SAM). The immobilization of Sudan I Mabs to the SAM was carried out through a stable acyl amino ester intermediate generated by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydrosuccinimide (NHS), which could condense antibodies reproducibly and densely on the SAM. The changes of the electrode behavior after each assembly step were investigated by cyclic voltammetric (CV) technique. The Sudan I concentration was measured through the increase of impedance values in the corresponding specific binding of Sudan I and Sudan I antibody. A linear relationship between the increased electron-transfer resistance (Ret) and the logarithmic value of Sudan I concentrations was found in the range of 0.05–50ngmL⁻¹ with the detection limit of 0.03ngmL⁻¹. Using hot chili as a model sample, acceptable recovery of 96.5–107.3% was obtained. The results were validated by conventional HPLC method with good correlation. The proposed method was proven to be a feasible quantitative method for Sudan I analysis with the properties of stability, highly sensitivity and selectivity.
Keywords	Sudan dyes ; detection limit ; dielectric spectroscopy ; electrodes ; electron transfer ; gold ; high performance liquid chromatography ; hybridomas ; immunosensors ; impedance ; monoclonal antibodies ; quantitative analysis
Language	English
Dates of publication	2011-0315
Size	p. 204-211.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1500969-5
ISSN	1873-3573 ; 0039-9140
ISSN (online)	1873-3573
ISSN	0039-9140
DOI	10.1016/j.talanta.2011.01.001
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Article ; Online: Label-free immunoassay for chloramphenicol based on hollow gold nanospheres/chitosan composite.

Zhang, Ningdan / Xiao, Fei / Bai, Jing / Lai, Yanjun / Hou, Jie / Xian, Yuezhong / Jin, Litong

Talanta

2011 Volume 87, Page(s) 100–105

Abstract	A novel label-free electrochemical immunosensor for rapid determination of chloramphenicol (CAP) was fabricated by entrapping monoclonal antibody to chloramphenicol (anti-CAP) in hollow gold nanospheres (HGNs)/chitosan composite modified on a glassy carbon electrode. The hollow gold nanospheres (HGNs) were prepared by using Co nanoparticles as sacrificial templates and characterized by transmission electron microscopy (TEM). The changes of the electrode behavior after each fabrication step were investigated by electrochemical impedance spectroscopy (EIS) technique. Under optimal conditions, the proposed immunosensor has a sensitive response to CAP in a linear range of 0.1-1000 ng mL(-1) with the detection limit of 0.06 ng mL(-1). Accurate detection of CAP in real meat samples was demonstrated by comparison with conventional HPLC method. The proposed method was proven to be a feasible quantitative method for CAP analysis with the properties of simple preparation, stability, high sensitivity and selectivity.
MeSH term(s)	Animals ; Anti-Bacterial Agents/analysis ; Anti-Bacterial Agents/immunology ; Antibodies, Immobilized/chemistry ; Antibodies, Immobilized/immunology ; Cattle ; Chitosan/chemistry ; Chloramphenicol/analysis ; Chloramphenicol/immunology ; Electrochemical Techniques/methods ; Fish Products/analysis ; Fishes ; Gold/chemistry ; Immunoassay/methods ; Meat/analysis ; Nanospheres/chemistry ; Nanospheres/ultrastructure ; Sensitivity and Specificity ; Swine
Chemical Substances	Anti-Bacterial Agents ; Antibodies, Immobilized ; Chloramphenicol (66974FR9Q1) ; Gold (7440-57-5) ; Chitosan (9012-76-4)
Language	English
Publishing date	2011-12-15
Publishing country	Netherlands
Document type	Evaluation Studies ; Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1500969-5
ISSN	1873-3573 ; 0039-9140
ISSN (online)	1873-3573
ISSN	0039-9140
DOI	10.1016/j.talanta.2011.07.108
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Article ; Online: A monoclonal antibody-based immunosensor for detection of Sudan I using electrochemical impedance spectroscopy.

Xiao, Fei / Zhang, Ningdan / Gu, Hongjie / Qian, Min / Bai, Jing / Zhang, Wen / Jin, Litong

Talanta

2011 Volume 84, Issue 1, Page(s) 204–211

Abstract	Sudan I monoclonal antibodies (Mabs) were prepared by hybridoma technique and firstly used to develop a Sudan I immunosensor by immobilizing the Mabs on a gold electrode. o-Mercaptobenzoic acid (MBA) was covalently conjugated on the gold electrode to form a self-assembled monolayer (SAM). The immobilization of Sudan I Mabs to the SAM was carried out through a stable acyl amino ester intermediate generated by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-hydrosuccinimide (NHS), which could condense antibodies reproducibly and densely on the SAM. The changes of the electrode behavior after each assembly step were investigated by cyclic voltammetric (CV) technique. The Sudan I concentration was measured through the increase of impedance values in the corresponding specific binding of Sudan I and Sudan I antibody. A linear relationship between the increased electron-transfer resistance (Ret) and the logarithmic value of Sudan I concentrations was found in the range of 0.05-50 ng mL(-1) with the detection limit of 0.03 ng mL(-1). Using hot chili as a model sample, acceptable recovery of 96.5-107.3% was obtained. The results were validated by conventional HPLC method with good correlation. The proposed method was proven to be a feasible quantitative method for Sudan I analysis with the properties of stability, highly sensitivity and selectivity.
MeSH term(s)	Animals ; Antibodies, Immobilized/chemistry ; Antibodies, Immobilized/immunology ; Antibodies, Monoclonal/chemistry ; Antibodies, Monoclonal/immunology ; Biosensing Techniques/economics ; Biosensing Techniques/methods ; Calibration ; Dielectric Spectroscopy/economics ; Dielectric Spectroscopy/methods ; Electrochemistry ; Electrodes ; Electron Transport ; Esters ; Ethyldimethylaminopropyl Carbodiimide/chemistry ; Female ; Food Analysis ; Gold/chemistry ; Immunoassay/economics ; Immunoassay/methods ; Limit of Detection ; Linear Models ; Mice ; Naphthols/analysis ; Naphthols/immunology ; Succinimides/chemistry ; Surface Properties
Chemical Substances	Antibodies, Immobilized ; Antibodies, Monoclonal ; Esters ; Naphthols ; Succinimides ; succinimide (10X90O3503) ; 1-phenylazo-2-naphthol (48I7IBB68J) ; Gold (7440-57-5) ; Ethyldimethylaminopropyl Carbodiimide (RJ5OZG6I4A)
Language	English
Publishing date	2011-03-15
Publishing country	Netherlands
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1500969-5
ISSN	1873-3573 ; 0039-9140
ISSN (online)	1873-3573
ISSN	0039-9140
DOI	10.1016/j.talanta.2011.01.001
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Article ; Online: Ultrasensitive electrochemical immunoassay based on graphene oxide-Ag composites for rapid determination of clenbuterol.

Bai, Jing / Lai, Yanjun / Jiang, Dawei / Zeng, Yanbo / Xian, Yuezhong / Xiao, Fei / Zhang, Ningdan / Hou, Jie / Jin, Litong

The Analyst

2012 Volume 137, Issue 18, Page(s) 4349–4355

Abstract: We report the development of an ultrasensitive amperometric biosensor based on Ag nanoparticles-decorated graphene oxide nanosheets (GO) (Ag-GO) for the rapid detection of clenbuterol (CLB). The morphology and structure of the Ag-GO labeled CLB (Ag-GO- ... ...

Abstract	We report the development of an ultrasensitive amperometric biosensor based on Ag nanoparticles-decorated graphene oxide nanosheets (GO) (Ag-GO) for the rapid detection of clenbuterol (CLB). The morphology and structure of the Ag-GO labeled CLB (Ag-GO-CLB) were characterized by transmission electron microscope (TEM), atomic force microscope (AFM), and ultraviolet-visible spectroscope (UV-vis). The immunosensor was prepared by covalently immobilizing capture antibodies on a multi-walled carbon nanotubes-modified glassy carbon electrode. Through competitive immunoreactions, the Ag-GO-CLB nanocomposites were captured on the immunosensor and the silver was measured by positive differential pulse voltammetry (DPV) in KCl solution for the detection of antigen. The experimental results show a linear response over the range from 0.01 to 10.0 ng mL(-1) with a lower detection limit of 6.8 pg mL(-1) (signal-to-noise ratio of 3). The Ag-GO based immunosensor offers a simple and convenient route for metal-immunoassay labels, which can avoid the complicated and time-consuming dissolving of metal component for ultrasensitive determination. Moreover, the electrochemical immunoassay shows acceptable specificity and stability and is suitable for the determination of CLB in real samples.
Language	English
Publishing date	2012-09-21
Publishing country	England
Document type	Journal Article
ZDB-ID	210747-8
ISSN	1364-5528 ; 0003-2654
ISSN (online)	1364-5528
ISSN	0003-2654
DOI	10.1039/c2an35473j
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