Synthesis, characterization and slow release properties of O-naphthylacetyl chitosan

Tao, Shuming; Pang, Ran; Chen, Chao; Ren, Xueqin; Hu, Shuwen

doi:10.1016/j.carbpol.2012.01.076

Cited by 55 publications

(19 citation statements)

References 29 publications

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“…Nanoformulations of micronutrients may be used to spray crops for enhanced foliar uptake, or nanomaterials with micronutrients may be used as a soil addition for their slow release to promote plant growth and improve soil health [215]. For an example, Tao et al [61] synthesized chitosan modified with 1-naphthylacetic acid, which is an important plant growth hormone. The results indicated that the release of the 1-naphthylacetic acid was strongly dependent on pH and temperature, and could continue for 55 days at pH 12 and 60 • C. Despite this dependence, the formulation offers potential for the slow release of plant growth hormones.…”

Section: Micronutrient Delivery For Crop Growth Promotionmentioning

confidence: 98%

Chitosan nanoparticle based delivery systems for sustainable agriculture

Kashyap

Xiang

Heiden

2015

International Journal of Biological Macromolecules

642

228

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Section: Micronutrient Delivery For Crop Growth Promotionmentioning

confidence: 98%

Chitosan nanoparticle based delivery systems for sustainable agriculture

Kashyap

Xiang

Heiden

2015

International Journal of Biological Macromolecules

642

228

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“…CS polymethacrylic acid colloidal suspension helps in sustained release because of a high affinity towards calcium phosphate rather than potassium chloride and urea due to high anionic charges [18]. CNPs also regulate upgraded micronutrient supplementation 1-naphthylacetic acid under various pH and temperature enhancing uptake of plant growth hormones [19]. Cu-CS complemented NPs show diverse antifungal efficacy combating Alternaria alternata, Macrophomina phaseolina, and Rhizoctonia solani [14].…”

Section: Introductionmentioning

confidence: 99%

Preparation and In Vitro Characterization of Chitosan Nanoparticles and Their Broad-Spectrum Antifungal Action Compared to Antibacterial Activities against Phytopathogens of Tomato

2019

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The present study was to prepare chitosan nanoparticles (CNPs) from chitosan (CS) to evaluate their in vitro antimicrobial activities against phytopathogens of tomato. We prepared and characterized CNPs for their particle size, polydispersity index, and structures. The antifungal properties of CS and CNPs against phytopathogenic fungi namely Colletotrichum gelosporidies, Phytophthora capsici, Sclerotinia sclerotiorum, Fusarium oxysporum, Gibberella fujikuori were investigated. CNPs showed the maximum growth inhibitory effects on mycelial growth of F. oxysporum followed by P. capsici. We also studied antibacterial activities against phytopathogenic bacteria, such as three strains of Erwinia carotovora subsp. carotovora and one strain of Xanthomonas campestris pv. vesicatoria. Our results showed that both CS and CNPs markedly inhibited the growth of the both Xanthomonas and Erwinia strains. From our study, it is evident that both CS and CNPs have tremendous potential against phytopathogens of tomato for further field screening towards crop protection.

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“…At regular intervals, 10 mL solution was withdrawn and 10 mL of fresh buffer was added. The NAA content was determined by UV spectrophotometry at a wavelength of 283.5 nm 17…”

Section: Methodsmentioning

confidence: 99%

“…Hydroxy‐bearing polymers are the ideal reagents for synthesizing esters of NAA, such as hexyl isomer alcohols,10 modified amylase,11 poly(ether‐amide)s bearing hydroxyl side groups,12 and poly(vinyl alcohol) 13. In our previous work, modified chitosan was used to prepare a novel formulation for sustained release of NAA,17 but the previous studies were limited to NAA‐releasing behaviors. Thus, the polymers possessed only one property of controlled‐release of NAA.…”

Section: Introductionmentioning

confidence: 99%

1‐naphthylacetic‐acid‐functionalized polyacrylate‐coated urea with dual controlled‐release properties

Qiu

Zhu

Tao

et al. 2012

J of Applied Polymer Sci

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Esters derived from 1‐naphthylacetic acid (NAA) and polyacrylate were synthesized and a dual controlled‐release formulation was developed by coating fertilizers with these esters. FT‐IR, 1H NMR, TGA, and DSC were used to characterize the synthesized polymers, and the mechanical properties were also tested. Urea granules were coated with NAA esters, and the release rates of urea from the coated granules in water were measured. NAA release from the esters was performed in different buffer solutions and in soil. The results showed that the coated fertilizers were able to release urea in a controlled pattern and that NAA could be slowly released from membranes of the esters in both buffer solutions and in soil through hydrolysis. The coated fertilizer's availability could last more than 28 days and that of NAA could last more than 12 months, which suggested that the prepared CRF possessed dual controlled‐release of urea and NAA. © 2012 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013

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Synthesis, characterization and slow release properties of O-naphthylacetyl chitosan

Cited by 55 publications

References 29 publications

Chitosan nanoparticle based delivery systems for sustainable agriculture

Chitosan nanoparticle based delivery systems for sustainable agriculture

Preparation and In Vitro Characterization of Chitosan Nanoparticles and Their Broad-Spectrum Antifungal Action Compared to Antibacterial Activities against Phytopathogens of Tomato

1‐naphthylacetic‐acid‐functionalized polyacrylate‐coated urea with dual controlled‐release properties

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