Urea-silica nanohybrids with potential applications for slow and precise release of nitrogen

Silva, Madhavi de; Siriwardena, Dumindu P.; Sandaruwan, Chanaka; Priyadarshana, Gayan; Karunaratne, Veranja; Kottegoda, Nilwala

doi:10.1016/j.matlet.2020.127839

Cited by 29 publications

(21 citation statements)

References 6 publications

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“…These metal-oxygen stretchings are specific in LDH, and the obtained values for metal-oxygen stretchings are well aligned with the previously reported FTIR spectra of CC-LDH. 4 The appearance of a new peak at 815 cm –1 was observed in the FTIR spectra of CC-LDH corresponding to the metal-oxygen stretching vibrations originating from interactions between curcuminoids and the Mg-Al-layered double hydroxide structure. 22 Assignment of functional groups in FTIR is further illustrated in Table S2 .…”

Section: Results and Discussionmentioning

confidence: 99%

“…These shifts in Mg 2+ and Al 3+ ions are observed in previously reported mechanochemical ground ascorbic acid-intercalated LDH, and the obtained results are compatible. 4 The significant shift in full width at half-maximum (FWHM) values of CC-LDH compared to that of LDH further represents the chemical state changes and physical influences from the external environment such as changing of surface charges, whereas the broadening of a peak indicates the presence of various modes of bonding with varying strengths. 20 XPS quantitative results for the nitrate-LDH and CC-LDH are provided in Table S1 in the Supporting Information.…”

Section: Results and Discussionmentioning

confidence: 99%

“…These weight loss percentages are well aligned with the previously reported thermograms of LDH. 4 The presence of curcuminoids has helped in reducing the degree of hydration, resulting in only a 15.6% weight reduction below 200 °C. The complete dehydroxylation of the nanohybrid accounted for a 5.1% weight loss within a temperature range of 200–400 °C.…”

Section: Results and Discussionmentioning

confidence: 99%

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A Novel Green Approach to Synthesize Curcuminoid-Layered Double Hydroxide Nanohybrids: Adroit Biomaterials for Future Antimicrobial Applications

et al. 2021

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Thermal instability, photodegradation, and poor bioavailability of natural active ingredients are major drawbacks in developing effective natural product-based antimicrobial formulations. These inherited issues could be fruitfully mitigated by the introduction of natural active ingredients into various nanostructures. This study focuses on the development of a novel green mechanochemical synthetic route to incorporate curcuminoids into Mg-Al-layered double hydroxides. The developed one-pot and scalable synthetic approach makes lengthy synthesis procedures using toxic solvents redundant, leading to improved energy efficiency. The hydrotalcite-shaped nanohybrids consist of surface and interlayer curcuminoids that have formed weak bonds with layered double hydroxides as corroborated by X-ray diffractograms, X-ray photoelectron spectra, and Fourier transmission infrared spectra. The structural and morphological properties resulted in increased thermal stability of curcuminoids. Slow and sustained release of the curcuminoids was observed at pH 5.5 for a prolonged time up to 7 h. The developed nanohybrids exhibited zeroth-order kinetics, favoring transdermal application. Furthermore, the efficacy of curcuminoid incorporated LDHs (CC-LDH) as an anticolonization agent was investigated against four wound biofilm-forming pathogens, Pseudomonas aeruginosa , Staphylococcus aureus , methicillin-resistant Staphyloccocus aureus , and Candida albicans , using a broth dilution method and an in vitro biofilm model system. Microbiological studies revealed a 54–58% reduction in biofilm formation ability of bacterial pathogens in developed nanohybrids compared to pure curcuminoids. Therefore, the suitability of these green-chemically synthesized CC-LDH nanohybrids for next-generation antimicrobial applications with advanced dermatological/medical properties is well established.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

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A Novel Green Approach to Synthesize Curcuminoid-Layered Double Hydroxide Nanohybrids: Adroit Biomaterials for Future Antimicrobial Applications

et al. 2021

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“…Additionally, the excellent efficacy of HA nanoparticles as a carrier molecule for delivering plant nutrients and as a source of phosphorus (P) has been established through the previous work carried out by our research group. ,− HA has the potential to cater to the need for the development of new phosphorus fertilizers with the onset of the depletion of natural phosphorus reserves and its inherent solubility issues. − The rich surface chemistry of HA nanoparticles has been utilized to construct nanohybrids with macro plant nutrients such as nitrogen and phosphorus, ,,, to mitigate global issues related to fertilizer utilization efficiencies. Such novel nanohybrids have been successful in the slow and precise delivery of plant macronutrients even at the farmers’ field level. ,, Therefore, doped HA nanoparticles could be identified as a potential candidate for the effective delivery of both macro and micro plant nutrients to alleviate nutrient deficiencies pertaining to the inhibition of plant growth and crop yields.…”

Section: Introductionmentioning

confidence: 99%

Zinc-Doped Hydroxyapatite–Urea Nanoseed Coating as an Efficient Macro–Micro Plant Nutrient Delivery Agent

Abeywardana

Silva

Sandaruwan

et al. 2021

ACS Agric. Sci. Technol.

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Application of micronutrients through seed amendments is an interesting option for field crops, allowing a uniform distribution of fertilizers in a seed batch. This process can be further improved by developing advanced materials for seed coatings that have the ability to carry out the delivery of plant nutrients with greater precision leading to enhanced germination. Herein, we disclose a novel nanoseed coating based on zinc-doped urea−hydroxyapatite nanohybrids synthesized via a one-pot in situ sol−gel synthetic route. The formation of a substituted solid with an altered chemical environment and the lattice shrinkage of hydroxyapatite nanoparticles due to the successful doping of zinc and urea incorporation were evident from characterization studies. The developed nanoseed coating was effective in increasing the rate of growth of Zea mays seeds by ∼69% and the germination rate by 19%, claiming its suitability as a potential candidate for the delivery of nitrogen, phosphorus, and zinc at the seedling stage.

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“…However, little can be done at the remaining time during ramie growth leading to a low water and N synergistic effect. We suggest that slow and precise releasing nitrogen fertilizers [ 61 ] should be used for a more precision ramie production, and integrative water and N regimes are essential for achieving higher and more efficient production [ 62 ].…”

Section: Discussionmentioning

confidence: 99%

Integrative Transcriptome and Proteome Analysis Identifies Major Molecular Regulation Pathways Involved in Ramie (Boehmeria nivea (L.) Gaudich) under Nitrogen and Water Co-Limitation

Chen

Gao

Chen

et al. 2020

Plants

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Water and N are the most important factors affecting ramie (Boehmeria nivea (L.) Gaudich) growth. In this study, de novo transcriptome assembly and Tandem Mass Tags (TMT) based quantitative proteome analysis of ramie under nitrogen and water co-limitation conditions were performed, and exposed to treatments, including drought and N-deficit (WdNd), proper water but N-deficit (WNd), proper N but drought (WdN), and proper N and water (CK), respectively. A total of 64,848 unigenes (41.92% of total unigenes) were annotated in at least one database, including NCBI non-redundant protein sequences (Nr), Swiss-Prot, Protein family (Pfam), Gene Ontology (GO) and KEGG Orthology (KO), and 4268 protein groups were identified. Most significant changes in transcript levels happened under water-limited conditions, but most significant changes in protein level happened under water-limited conditions only with proper N. Poor correlation between differentially expressed genes (DEGs) and differentially expressed proteins (DEPs) was observed in ramie responding to the treatments. DEG/DEP regulation patterns related to major metabolic processes responding to water and N deficiency were analyzed, including photosynthesis, ethylene responding, glycolysis, and nitrogen metabolism. Moreover, 41 DEGs and 61 DEPs involved in regulating adaptation of ramie under water and N stresses were provided in the study, including DEGs/DEPs related to UDP—glucuronosyhransferase (UGT), ATP synthase, and carbonate dehydratase. The strong dependency of N-response of ramie on water conditions at the gene and protein levels was highlighted. Advices for simultaneously improving water and N efficiency in ramie were also provided, especially in breeding N efficient varieties with drought resistance. This study provided extensive new information on the transcriptome, proteome, their correlation, and diversification in ramie responding to water and N co-limitation.

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Urea-silica nanohybrids with potential applications for slow and precise release of nitrogen

Cited by 29 publications

References 6 publications

A Novel Green Approach to Synthesize Curcuminoid-Layered Double Hydroxide Nanohybrids: Adroit Biomaterials for Future Antimicrobial Applications

A Novel Green Approach to Synthesize Curcuminoid-Layered Double Hydroxide Nanohybrids: Adroit Biomaterials for Future Antimicrobial Applications

Zinc-Doped Hydroxyapatite–Urea Nanoseed Coating as an Efficient Macro–Micro Plant Nutrient Delivery Agent

Integrative Transcriptome and Proteome Analysis Identifies Major Molecular Regulation Pathways Involved in Ramie (Boehmeria nivea (L.) Gaudich) under Nitrogen and Water Co-Limitation

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