Chemical induced fabrication of silver nanoparticles (Ag-NPs) as nanocatalyst with alpha amylase enzyme for enhanced breakdown of starch

Krishnakumar, S.; Janani, P.; Mugilarasi, S.; Kumari, G. Vanitha; Janney, J Bethanney

doi:10.1016/j.bcab.2018.06.016

Cited by 16 publications

(9 citation statements)

References 18 publications

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“…It is well-known that the catalytic activity of the immobilized enzymes depends greatly upon the supporting material. The extremely small size and the large specific surface area of nanoparticles endow them as nanocarriers with minimized diffusional restrictions and maximized enzyme loading capacities, thereby enhancing enzyme activities. , …”

Section: Introductionmentioning

confidence: 99%

Carboxylated Cellulose Nanocrystals Developed by Cu-Assisted H₂O₂ Oxidation as Green Nanocarriers for Efficient Lysozyme Immobilization

Koshani

Ven

2020

J. Agric. Food Chem.

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Cellulose nanocrystals (CNCs), having a high specific surface area and versatile surface chemistry, provide considerable potential to interact by various mechanisms with enzymes for nano-immobilization purposes. However, engineering chemically safe CNCs, suitable for edible administrations, presents a significant challenge. A reliable carboxylate form of H-CNCs was formed using H 2 O 2 oxidation of softwood pulp under mild thermal conditions. Negatively charged carboxyl groups (∼0.9 mmol g −1 ) played a key role in lysozyme immobilization via electrostatic interactions and covalent linkages, as evidenced by Fourier transform infrared and 13 C cross-polarization magic angle spinning nuclear magnetic resonance spectroscopies. Adsorption isotherms showed a high loading capacity of H-CNCs (∼240 mg g −1 ), and fitting the data to the Langmuir model confirmed monolayer coverage of lysozyme on their surface. Using a non-toxic coupling agent, 4-(4,6-dimethoxy-1,3,5-triazin-2-yl)-4-methylmorpholinium chloride, lysozyme-conjugated H-CNCs were developed with an immobilization yield of ∼65% and relative catalytic activity of ∼60%, similar to lysozyme adsorption on H-CNCs. These H-CNC−lysozyme nanohybrids, rationally processed via safe and green strategies, are specifically exploitable as catalytically active emulsifiers in food and pharmaceutical sectors.

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Section: Introductionmentioning

confidence: 99%

Carboxylated Cellulose Nanocrystals Developed by Cu-Assisted H₂O₂ Oxidation as Green Nanocarriers for Efficient Lysozyme Immobilization

Koshani

Ven

2020

J. Agric. Food Chem.

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“…In the fight against pathogens is very important the method of preparing nanoparticles and the use of reducing and coating agents that can influence the interactions between the drug and silver and can determine the size and shape [92,[123][124][125][126]. Silver nanoparticles can be synthetized by chemical and biological methods, the most known being reduction of silver nitrate (AgNO3) with a large variety of reducing agents such as sodium citrate [123,127,128], sodium borohydride [129], glucose [130,131], gallic acid, ascorbic acid and plant extract [92,132] but also by electrochemical or photochemical methods.…”

Section: Example Of Metallic Biomaterialsmentioning

confidence: 99%

Biomaterials With Enhanced Biological Functions for Medical Applications

Balint¹,

Paltinean²,

Tomoaia³

et al. 2021

AnnalsARSciBio

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Biomaterials and their use as implant coatings have been evaluated focusing on biocompatibility, biodegradability and constructive responses in terms of osseointegration, cell proliferation and cell adhesion. Biomaterials from natural (protein and polysaccharide) and synthetic (metallic, polymeric, ceramic and composite) sources have been identified. The role of biomaterials and implant coatings in the body through in vivo and in vitro experiments has been highlighted. In addition, methods for activating the surface of implants such as mechanical, chemical and physical ones are presented, as well as the classification of the deposition procedures but also of the interactions with the living system. This review addresses a topic with future challenges and perspectives in the biomedical field with the well-defined goal of maintaining and enhancing tissue elasticity, facilitating the healing of diseases suffered by patients and developing innovative materials capable of replacing or regenerating affected tissues.

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“…Two major methods for the preparation of AgNPs and AuNPs are shown in Figure 1, namely chemical and biological methods. -Chemical synthesis of silver nanoparticles The literature study of the agents involved in the preparation of AgNPs as well the temperature conditions are highlighted in Table 2 [153][154][155][156][157][158][159][160][161][162][163][164][165][166][167]. Depending on these factors, the shape and size characteristics of the nanoparticles are determined.…”

Section: Synthesismentioning

confidence: 99%

“…Sodium borohydride and gallic acid is another example of a reducing and capping agents which results in approximately spherical forms of AgNPs obtained at room temperature [160,161]. By adding thioctic acid as capping agent, AgNPs with an average diameter around 45-50 nm are obtained [153].…”

Section: Synthesismentioning

confidence: 99%

Silver and Gold Nanoparticles: Challenges and Perspectives

UJICA¹,

Paltinean²,

Mocanu³

et al. 2020

AnnalsARSciBio

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Syntheses of gold nanoparticles (AuNPs) and silver nanoparticles (AgNPs) were evaluated with an emphasis on controlling the size, shape and stability of nanoparticles (NPs). Various reducing and capping agents of NPs from the sphere of chemistry and biology were identified together with their role in synthesis and controlled NPs properties. Those NPs were characterized with a variety of methods in order to determine the activities of nanoparticles and their applications in real life. In addition, carriers of these NPs in-vitro and in-vivo investigations and models of nanoscale interactions are presented. This review also addresses systematically the biomedical applications of AuNPs and AgNPs taking into account the actual challenges and perspectives in this research field.

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Chemical induced fabrication of silver nanoparticles (Ag-NPs) as nanocatalyst with alpha amylase enzyme for enhanced breakdown of starch

Cited by 16 publications

References 18 publications

Carboxylated Cellulose Nanocrystals Developed by Cu-Assisted H₂O₂ Oxidation as Green Nanocarriers for Efficient Lysozyme Immobilization

Carboxylated Cellulose Nanocrystals Developed by Cu-Assisted H₂O₂ Oxidation as Green Nanocarriers for Efficient Lysozyme Immobilization

Biomaterials With Enhanced Biological Functions for Medical Applications

Silver and Gold Nanoparticles: Challenges and Perspectives

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Chemical induced fabrication of silver nanoparticles (Ag-NPs) as nanocatalyst with alpha amylase enzyme for enhanced breakdown of starch

Cited by 16 publications

References 18 publications

Carboxylated Cellulose Nanocrystals Developed by Cu-Assisted H2O2 Oxidation as Green Nanocarriers for Efficient Lysozyme Immobilization

Carboxylated Cellulose Nanocrystals Developed by Cu-Assisted H2O2 Oxidation as Green Nanocarriers for Efficient Lysozyme Immobilization

Biomaterials With Enhanced Biological Functions for Medical Applications

Silver and Gold Nanoparticles: Challenges and Perspectives

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Product

Resources

About

Carboxylated Cellulose Nanocrystals Developed by Cu-Assisted H₂O₂ Oxidation as Green Nanocarriers for Efficient Lysozyme Immobilization

Carboxylated Cellulose Nanocrystals Developed by Cu-Assisted H₂O₂ Oxidation as Green Nanocarriers for Efficient Lysozyme Immobilization