U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PubAg

Main content area

You searched for: Author "Lijun Han" Remove constraint Author: "Lijun Han"
Start Over

Search

45  Search Results

« Previous | 1 - 20 of 45 |
Number of results to display per page

Search Results

1. Method Validation and Residue Analysis of Mesosulfuron-Methyl and Diflufenican in Wheat Field Trial by Liquid Chromatography with Tandem Mass Spectrometry

Author:
Lijun Han,   et al.   ; Fayi Qin; Yingying Bi; Shuangyu Song; Xinru Lv;     Show all 5 Authors
Source:
Food analytical methods 2022 v.15 no.10 pp. 2617-2624
ISSN:
1936-9751
Subject:
diflufenican; field experimentation; liquid chromatography; nutrition risk assessment; tandem mass spectrometry; wheat; wheat straw; China
Abstract:
... In this study, an optimized QuEChERS method with liquid chromatography-tandem mass spectrometry (LC–MS/MS) was developed and validated for the determination of mesosulfuron-methyl and diflufenican in wheat grain and straw. At the spiking levels of 0.01, 0.02, 0.05, 0.1, and 1 mg/kg, the average recoveries of five repetitions were 74–98% with RSDs of 1–11%. The LOQs of the two herbicides were both ...
DOI:
10.1007/s12161-022-02296-1

2. Residue Behavior and Risk Assessment of Pyraclostrobin and Thifluzamide in Cowpea

Author:
Lijun Han,   et al.   ; Shihang Han; Yingying Bi; Shuangyu Song; Ziyu Ye; Fayi Qin; Xinru Lv;     Show all 7 Authors
Source:
Bulletin of environmental contamination and toxicology 2022 v.108 no.4 pp. 786-790
ISSN:
0007-4861
Subject:
cowpeas; good agricultural practices; half life; liquid chromatography; pollution; pyraclostrobin; risk assessment; storage quality; tandem mass spectrometry; toxicology; China
Abstract:
... A rapid and sensitive analytical method for determination of pyraclostrobin and thifluzamide in cowpea was established based on QuEChERS sample preparation and liquid chromatography–tandem mass spectrometry (LC–MS/MS). Average recoveries of pyraclostrobin and thifluzamide on cowpea were 100%–105% and 99%–105% with RSDs of 1%–5% and 2%–6%, respectively. The storage stability tests showed degradatio ...
DOI:
10.1007/s00128-021-03421-2

3. Antioxidant and antimicrobial polyvinyl alcohol electrospun nanofibers containing baicalein-hydroxypropyl-β-cyclodextrin inclusion complex

Author:
Lijun Han,   et al.   ; Xiaona Hu; Xiaoyan Wang; Shujing Li; Wei Zhou;     Show all 5 Authors
Source:
Colloids and surfaces 2021 v.614 pp. 126135
ISSN:
0927-7757
Subject:
Candida albicans; Escherichia coli; Staphylococcus aureus; antibiotics; antioxidant activity; antioxidants; calorimeters; medicine; nanofibers; polyvinyl alcohol; thermogravimetry; water solubility
Abstract:
... A novel antioxidant and antibacterial material were prepared by incorporating Baicalein-Hydroxypropyl-β-Cyclodextrin inclusion complex (Ba-IC) into polyvinyl alcohol (PVA) nanofibers (PVA-Ba-IC-NF) via electrospinning method. Herein, PVA was used as the polymeric matrix for the nanofibers. The PVA-Ba-IC-NF were characterized in terms of scanning electron microscope (SEM), differential scanning cal ...
DOI:
10.1016/j.colsurfa.2021.126135

4. Semi-automated high-throughput method for residual analysis of 302 pesticides and environmental contaminants in catfish by fast low-pressure GC–MS/MS and UHPLC-MS/MS

Author:
Lijun Han,   et al.   ; Yelena Sapozhnikova;     Show all 2 Author
Source:
Food chemistry 2020 v.319 pp. 126592
ISSN:
0308-8146
Subject:
automation; catfish; chemical species; flame retardants; gas chromatography-mass spectrometry; lipophilicity; markets; metabolites; muscles; pesticides; pollution; polybrominated diphenyl ethers; polychlorinated biphenyls; polycyclic aromatic hydrocarbons; robots; tandem mass spectrometry; United States
Abstract:
... A fast, fit-for-purpose, high-throughput method was developed and validated for the analysis of 302 targeted contaminants in catfish muscle. Targeted contaminants included pesticides and metabolites with US regulatory levels, plus other lipophilic pesticides and environmental contaminants: PAHs, PCBs, PBDEs and other flame retardants. The sample preparation was based on QuEChERS extraction. The ex ...
DOI:
10.1016/j.foodchem.2020.126592

5. Development and characterization of novel bigels based on monoglyceride-beeswax oleogel and high acyl gellan gum hydrogel for lycopene delivery

Author:
Lijun Han,   et al.   ; Qiaomei Zhu; Jianbiao Gao; Kexin Han; Wei Wei; Tao Wu; Jinlong Li; Min Zhang;     Show all 8 Authors
Source:
Food chemistry 2021 v.365 pp. 130419
ISSN:
0308-8146
Subject:
dietary supplements; digestion; firmness; food chemistry; gastrointestinal system; gellan gum; glycerol; hydrogels; loss modulus; lycopene; oleogels; storage modulus; strength (mechanics); temperature
Abstract:
... The aim of present study was to develop novel bigels as a semi-solid vehicle for lycopene delivery. Bigels were prepared by using the mixture of glycerol monostearate (GMS)-beeswax based oleogel and high acyl gellan gum hydrogel in different proportions. The confocal microscopic observations showed that the obtained bigels were oleogel-in-hydrogel, and droplets became larger with increased content ...
DOI:
10.1016/j.foodchem.2021.130419

6. Design, Synthesis, and Biological Evaluation of Novel Psoralen-Based 1,3,4-Oxadiazoles as Potent Fungicide Candidates Targeting Pyruvate Kinase

Author:
Lijun Han,   et al.   ; Jingyue Dong; Wei Gao; Kun Li; Zeyu Hong; Liangfu Tang; Zhihong Wang; Zhijin Fan;     Show all 8 Authors
Source:
Journal of agricultural and food chemistry 2022 v.70 no.11 pp. 3435-3446
ISSN:
1520-5118
Subject:
Botrytis cinerea; active sites; antifungal properties; bioassays; biological assessment; food chemistry; fungicides; lead; moieties; psoralen; pyruvate kinase
Abstract:
... Pyruvate kinase (PK) has been considered as a promising fungicide target discovered in our previous studies. Natural compounds are important sources for discovery and development of new pesticides. To continue our ongoing studies on the discovery of novel PK-targeted fungicides, a series of novel psoralen derivatives including a 1,3,4-oxadiazole moiety were designed by a computer-aided pesticide m ...
DOI:
10.1021/acs.jafc.1c07911

7. Novel [1,2,4]-Triazolo[3,4-b]-[1,3,4]thiadizoles as Potent Pyruvate Kinase Inhibitors for Fungal Control

Author:
Lijun Han,   et al.   ; Wei Gao; Yue Zhang; Lai Chen; Xiaoyu Liu; Kun Li; Zhenwu Yu; Jinzhou Ren; Liangfu Tang; Zhijin Fan;     Show all 10 Authors
Source:
Journal of agricultural and food chemistry 2022 v.70 no.33 pp. 10170-10181
ISSN:
1520-5118
Subject:
Alternaria solani; Botrytis cinerea; Mycosphaerella arachidis; Physalospora; Pseudoperonospora cubensis; Sclerotinia sclerotiorum; Thanatephorus cucumeris; antifungal properties; enzyme inhibition; fluorescence; food chemistry; fungi; growth retardation; lead; mechanism of action; models; pyruvate kinase
Abstract:
... To discover novel target-based fungicidal candidates, a molecular design model was established with a three-dimensional (3D) structure of Rhizoctonia solani pyruvate kinase (RsPK) simulated with the AlphaFold 2 and YZK-C22 as a fungicidal lead. A series of novel [1,2,4]triazolo[3,4-b][1,3,4]thiadiazole derivatives were rationally designed, synthesized, evaluated for their fungicidal performance, a ...
DOI:
10.1021/acs.jafc.2c03758

8. Design, Synthesis, and Evaluation of Novel 4-Chloropyrazole-Based Pyridines as Potent Fungicide Candidates

Author:
Lijun Han,   et al.   ; Ying Wang; Song Kou; Jingqian Huo; Susu Sun; Yanen Wang; Hongwei Yang; Shiyong Zhao; Liangfu Tang; Jinlin Zhang; Lai Chen;     Show all 11 Authors
Source:
Journal of agricultural and food chemistry 2022 v.70 no.30 pp. 9327-9336
ISSN:
1520-5118
Subject:
bioassays; biosynthesis; enzyme inhibition; enzymes; food chemistry; fungi; imazalil; mechanism of action; microscopy; pyridines; sterols; triadimefon
Abstract:
... A rational molecular design approach was developed in our laboratory to guide the discovery of novel sterol biosynthesis inhibitors. Based on the application of bioactivities of heterocyclic rings and molecular docking targeting the sterol biosynthesis 14α-demethylase, a series of 4-chloropyrazole-based pyridine derivatives were rationally designed, synthesized, and characterized and their fungici ...
DOI:
10.1021/acs.jafc.2c02350

9. Analysis and Occurrence of Organophosphate Esters in Meats and Fish Consumed in the United States

Author:
Lijun Han,   et al.   ; Yelena Sapozhnikova; Alberto Nuñez;     Show all 3 Authors
Source:
Journal of agricultural and food chemistry 2019 v.67 no.46 pp. 12652-12662
ISSN:
1520-5118
Subject:
acetonitrile; automation; beef; catfish; chickens; esters; flame retardants; flow injection analysis; gas chromatography-mass spectrometry; liquid chromatography; markets; maximum residue limits; muscle tissues; organophosphorus compounds; phosphates; plasticizers; pork; robots; salmon; tandem mass spectrometry; United States
Abstract:
... Organophosphate esters (OPEs) are chemicals extensively used as plasticizers and flame retardants in commercial and consumer products. In this study, we developed and validated a method for the analysis of 13 common OPEs in meat (chicken, pork, and beef) and fish (catfish and salmon) to study their occurrence in those foods in the United States. The method was based on QuEChERS extraction with ace ...
DOI:
10.1021/acs.jafc.9b01548

10. Bacterial-induced mineralization (BIM) for soil solidification and heavy metal stabilization: A critical review

Author:
Lijun Han,   et al.   ; Jiangshan Li; Qiang Xue; Zhen Chen; Yaoyu Zhou; Chi Sun Poon;     Show all 6 Authors
Source:
Science of the total environment 2020 v.746 pp. 140967
ISSN:
0048-9697
Subject:
carbon footprint; cement; environment; fossil fuels; heavy metals; mineralization; remediation; soil strength; solidification
Abstract:
... Solidification and stabilization (S/S) treatment via cement is common and effective for improving soil strength and stabilizing heavy metals in contaminated soils, but has certain drawbacks, such as high fossil energy consumption, big carbon footprint, poor chemical compatibility, and ambiguous long-term stability. This paper innovatively proposes bacterial-induced mineralization (BIM) as an eco-f ...
DOI:
10.1016/j.scitotenv.2020.140967

11. Nanozyme Sensor Arrays Based on Heteroatom-Doped Graphene for Detecting Pesticides

Author:
Lijun Han,   et al.   ; Yunyao Zhu; Jiangjiexing Wu; Xiaoyu Wang; Wei Li; Hongchao Guo; Hui Wei;     Show all 7 Authors
Source:
Analytical chemistry 2020 v.92 no.11 pp. 7444-7452
ISSN:
1520-6882
Subject:
analytical chemistry; bensulfuron-methyl; colorimetry; cost effectiveness; environmental protection; fomesafen; food safety; graphene; human health; lactofen; pest control; plant growth; soil
Abstract:
... Pesticides, widely used for pest control and plant growth regulation, have posed a threat to the environment and human health. Conventional methods to analyze pesticide residues are not applied to resource-limited areas because of their high cost, complexity, and requirements for expensive instruments (such as GC/MS and LC/MS). To address these challenges, herein we fabricated colorimetric nanozym ...
DOI:
10.1021/acs.analchem.9b05110

12. Method validation, storage stability and field trial for residues of florasulam and pyroxsulam in cereal by liquid chromatography with tandem mass spectrometry

Author:
Lijun Han,   et al.   ; Yingying Bi; Shuangyu Song; Wei Yao; Fayi Qin; Yanjun Xu; Qiong Wu;     Show all 7 Authors
Source:
Food additives & contaminants 2020 v.37 no.5 pp. 793-803
ISSN:
1944-0057
Subject:
corn; field experimentation; florasulam; frozen storage; liquid chromatography; millets; nutrition risk assessment; oats; pesticide residues; rice; storage quality; storage temperature; tandem mass spectrometry; wheat; wheat straw
Abstract:
... A QuEChERS method with liquid chromatography-tandem mass spectrometry (LC-MS/MS) was modified and validated for the determination of florasulam and pyroxsulam residues in wheat grain and straw. The validated method was applied to cereals including oat, millet, corn and rice. Average recoveries were 76-113% with RSDs 2-15%. The limits of quantitation (LOQ) were 0.005 mg/kg for wheat grain and 0.01 ...
DOI:
10.1080/19440049.2020.1723809

13. Research on non-linear characteristics of rock energy evolution under uniaxial cyclic loading and unloading conditions

Author:
Lijun Han,   et al.   ; Qingbin Meng; Mingwei Zhang; Zhizheng Zhang; Hai Pu;     Show all 5 Authors
Source:
Environmental earth sciences 2019 v.78 no.23 pp. 650
ISSN:
1866-6280
Subject:
deformation; disasters; energy; energy density; engineering; equations; limestone; lithology; models; sandstone
Abstract:
... Most of the existing researches on energy evolution in the process of rock deformation and failure mainly revolve around a specific stage (before or after the peak). However, there are few studies involving the impacts of lithology and loading rate on the energy evolution in the whole process from deformation to failure, especially the studies on non-linear characteristics of rock energy, which is ...
DOI:
10.1007/s12665-019-8638-9

14. The preparation, characterization, anti-ultraviolet and antimicrobial activity of gelatin film incorporated with berberine-HP-β-CD

Author:
Lijun Han,   et al.   ; Xiaona Hu; Li Yuan; Shujing Li; Wei Zhou;     Show all 5 Authors
Source:
Colloids and surfaces 2020 v.586 pp. 124273
ISSN:
0927-7757
Subject:
Candida albicans; Staphylococcus aureus; active food packaging; anti-infective agents; antimicrobial properties; gelatin; light; light transmission; mechanical properties; permeability; thermal stability; water content; water solubility; water vapor
Abstract:
... A series of gelatin films incorporated with berberine-HP-β-CD inclusion complex (BHC) were prepared and investigated. The mechanical properties, moisture content, water solubility, water vapor permeability, thermal stability, light transmission, microstructural characteristics, and antimicrobial characteristics of the films were studied. The addition of BHC to gelatin film increased the thickness, ...
DOI:
10.1016/j.colsurfa.2019.124273

15. Characterization of antioxidant and antibacterial gelatin films incorporated with Ginkgo biloba extract

Author:
Lijun Han,   et al.   ; Xiaona Hu; Li Yuan; Shujing Li; Liya Song;     Show all 5 Authors
Source:
RSC advances 2019 v.9 no.47 pp. 27449-27454
ISSN:
2046-2069
Subject:
Ginkgo biloba; active ingredients; antibacterial properties; antioxidant activity; antioxidants; flavonoids; food packaging; functional properties; gelatin; mechanical properties; microorganisms; microstructure; permeability; phenolic compounds; solubility; spectral analysis; water content; water vapor
Abstract:
... Ginkgo biloba extract (GBE) contains Ginkgo biloba flavonoids, which are phenolic compounds. These compounds can be introduced into films for their functional properties (such as their antioxidant and antibacterial property), allowing this film to be used as food packaging. Thus, the aim of this study was to introduce the GBE into a gelatin solution to prepare gelatin films and evaluate the influe ...
DOI:
10.1039/c9ra05788a

16. Hydrolysis Kinetics of a Novel 3,4-Dichloroisothiazole Plant-Activator Candidate LY5-24-2 by UPLC-Q-TOF

Author:
Lijun Han,   et al.   ; Shuangyu Song; Chengkui Qiao; Hanzhong Xie; Yingying Bi; Fayi Qin; Qifan Wu; Yuedong Li; Zhijin Fan;     Show all 9 Authors
Source:
Bulletin of environmental contamination and toxicology 2021 v.106 no.6 pp. 1009-1016
ISSN:
0007-4861
Subject:
aqueous solutions; fungicides; half life; hydrolysates; hydrolysis; kinetics; mass spectrometry; metabolites; multivariate analysis; pH; pollution; principal component analysis; temperature; toxicology; ultra-performance liquid chromatography
Abstract:
... Hydrolysis characteristics of a novel 3,4-dichloroisothiazole based fungicide with activating plant defense responses as a candidate plant-activator LY5-24-2 were investigated under different conditions (pH and temperature) using ultra-performance liquid chromatography (UPLC) and quadrupole Time-of-Flight (Q-TOF). The hydrolysis case complied with the first-order kinetic model, with half-lives ran ...
DOI:
10.1007/s00128-021-03204-9

17. Method validation and residue analysis of methoxyfenozide and metaflumizone in Chinese broccoli under field conditions by liquid chromatography with tandem mass spectrometry

Author:
Lijun Han,   et al.   ; Yingying Bi; Wei Yao; Chengkui Qiao; Shuangyu Song; Fayi Qin; Qin Dong; Xianghong Hao; Yanjun Xu;     Show all 9 Authors
Source:
Journal of separation science 2021 v.44 no.20 pp. 3860-3869
ISSN:
1615-9306
Subject:
Brassica oleracea var. alboglabra; carbon nanofibers; half life; high performance liquid chromatography; metaflumizone; methoxyfenozide; secondary amines; separation; soot; sorbents; storage quality; tandem mass spectrometry
Abstract:
... Methoxyfenozide and metaflumizone are insecticides used on Chinese broccoli to prevent insects and increase yield. However, the residues are potentially harmful to the environment and consumers. In this study, the quick, easy, cheap, effective, rugged, safe method with high‐performance liquid chromatography with tandem mass spectrometry was modified and validated for determination of methoxyfenozi ...
DOI:
10.1002/jssc.202100348

18. Bulk sedimentary phosphorus in relation to organic carbon, sediment textural properties and hydrodynamics in the northern Beibu Gulf, South China Sea

Author:
Lijun Han,   et al.   ; Solomon Felix Dan; Wenlu Lan; Bin Yang; Cheng Xu; Dongliang Lu; Zhenjun Kang; Haifang Huang; Zhiming Ning;     Show all 9 Authors
Source:
Marine pollution bulletin 2020 v.155 pp. 111176
ISSN:
0025-326X
Subject:
hydrodynamics; marine pollution; organic carbon; sand; seawater; texture; South China Sea
Abstract:
... Bulk sedimentary phosphorus (P) is studied to evaluate its source, distribution, preservation and enrichment in relation with organic carbon (OC), sediment textures and moisture contents in the northern Beibu Gulf. Approximately 80% of surface sediments in the investigated sites were composed of coarse sandy texture (>63 μm). Total P (TP), inorganic P (IP) and organic P (OP) contents were lower to ...
DOI:
10.1016/j.marpolbul.2020.111176

19. Evaluation of cleanup procedures in pesticide multi-residue analysis with QuEChERS in cinnamon bark

Author:
Lijun Han,   et al.   ; Zihao Zhang; Maofeng Dong; Xianghong Hao; Shuangyu Song; Wei Yao;     Show all 6 Authors
Source:
Food chemistry 2019 v.276 pp. 140-146
ISSN:
0308-8146
Subject:
bark; chemical species; cinnamon; liquid chromatography; magnesium sulfate; markets; multiresidue analysis; pesticide residues; pesticides; solid phase extraction; solvents; sorbents; tandem mass spectrometry; water solubility
Abstract:
... Cinnamon bark is a very complex spices matrix for pesticide residue analysis. In this study, two cleanup procedures, dispersive solid-phase extraction (d-SPE) and repetitive d-SPE, combined with Quick, Easy, Cheap, Effective, Rugged and Safe (QuEChERS) extraction were both investigated and applied for the determination of 60 pesticide residues in cinnamon bark by liquid chromatography − tandem mas ...
DOI:
10.1016/j.foodchem.2018.10.019

20. Multi-residue Analysis of 34 Pesticides in Black Pepper by QuEChERS with d-SPE Vs. d-SLE Cleanup

Author:
Lijun Han,   et al.   ; Wei Yao; Zihao Zhang; Shuangyu Song; Xianghong Hao; Yanjun Xu;     Show all 6 Authors
Source:
Food analytical methods 2019 v.12 no.1 pp. 176-189
ISSN:
1936-9751
Subject:
European Union; acetamiprid; black pepper; carbendazim; clothianidin; liquid chromatography; markets; maximum residue limits; mefenoxam; multiresidue analysis; solid phase extraction; tandem mass spectrometry; China
Abstract:
... In this study, quick, easy, cheap, effective, rugged, and safe (QuEChERS) method coupled with liquid chromatography-tandem mass spectrometry (LC-MS/MS) was applied and optimized in determination of 34 commonly used pesticides in black pepper. Two cleanup approaches including dispersive solid-phase extraction (d-SPE) and dispersive solid liquid extraction (d-SLE) were investigated and compared. The ...
DOI:
10.1007/s12161-018-1350-7