Synthesis and spectroscopic investigations of hydroxyapatite using a green chelating agent as template

Gopi, D.; Bhuvaneshwari, N.; Indira, J.; Kavitha, L.

doi:10.1016/j.saa.2012.11.092

Cited by 45 publications

(18 citation statements)

References 32 publications

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“…Similar to the results of investigation conducted by Gopi, Bhuvaneshwari, Indira, and Kavitha () and López‐Córdoba et al (), in this study, in the control sample (Figure c) and the co‐crystallized samples containing extract (Figure a and b), signals were observed in the frequencies range of 3,330–3,560, 2,935, 1,392, 1,320, 1,034m and 951 cm −1 related to the stretching vibration of [sbond]OH groups, symmetric and asymmetric stretching of [sbond]CH 2 groups, deformation of OH groups, C[sbond]H rocking, and C[sbond]O stretching, respectively. All samples showed bands of the sucrose molecule.…”

Section: Resultssupporting

confidence: 91%

“…Infrared spectroscopy was performed to assess chemical structure and identify absorbance bands of the functional groups present in the co-crystallized products without and with marjoram extract (Figure 2). Similar to the results of investigation conducted by Gopi, Bhuvaneshwari, Indira, and Kavitha (2013) and López-Córdoba et al (2014), in this study, in the control sample (Figure 2c) and the co-crystallized samples containing extract (Figure 2a and b), signals were observed in the frequencies range of 3,330-3,560, 2,935, 1,392, 1,320, 1,034m…”

Section: Fourier Transform Infrared Spectroscopysupporting

confidence: 88%

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Physicochemical properties and antioxidant stability of microencapsulated marjoram extract prepared by co‐crystallization method

Sarabandi

Mahoonak

Akbari

2018

J Food Process Engineering

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In this study, the physicochemical characteristics of the microencapsulated marjoram extract powders such as entrapment yield (EY), loading capacity (LC), DPPH* radical scavenging activity, thermal characteristics (DSC), chemical structure (FTIR), and surface morphology (SEM) was investigated. Finally, the maintenance yield of total phenolic compounds and antioxidant properties of the co‐crystallized powder were compared with the spray‐dried powders in different conditions (75% relative humidity, artificial light, darkness, and at temperature of 4°C) during 4 months storage. The color and loading capacity of powder samples was significantly affected by concentrations of the extract. The encapsulation efficiency of co‐crystallized products was about 83%. DSC and FTIR graphs indicate lack of interaction between core and matrix components. The surface morphology of particles showed porous structure and the irregular holes among the agglomerates. Also, stability tests indicated a better performance of co‐crystallization process than the spray‐drying in maintaining phenolic compounds during different storage conditions. Practical applications Marjoram has several health benefits and its bioactive components can be used to produce functional foods. However, due to many problems including an unpleasant taste and instability of their polyphenols during storage, use of its liquid extract made is difficult. Encapsulation by co‐crystallization process due to its unique features is a promising method for protection of sensitive bioactive components such as phenolic compounds. Sucrose as a safe and food grade carrier is main matrix in this process and widely used in various food industries. The co‐crystallized Marjoram extract can be used as a source of antioxidants in the production of functional foods, confectionery, chocolate, candy products, and a variety of instant drinks powders.

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Section: Resultssupporting

confidence: 91%

Section: Fourier Transform Infrared Spectroscopysupporting

confidence: 88%

Physicochemical properties and antioxidant stability of microencapsulated marjoram extract prepared by co‐crystallization method

Sarabandi

Mahoonak

Akbari

2018

J Food Process Engineering

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“…4 The HAP has been widely used in many of the clinical applications like bone repair, bone growth, and also widely used as coating material for metallic implants. Although there are different chemical methods available to synthesize HAP, 5,6,7,8,9,10,11 researchers still search for the facile, cheap, eco-friendly, and time saving method for the synthesis of bioactive HAP. Several biomimetics techniques are eco-friendly and low-cost production than the conventional processes and also minimize the environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

Biowaste‐derived hydroxyapatite reinforced with polyvinyl pyrrolidone/aloevera composite for biomedical applications

Mathina

Elangomannan

Kavitha

et al. 2020

Int J Applied Ceramic Tech

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The present investigation focuses on the synthesis of crabshell-derived hydroxyapatite (CS-HAP)/ water-soluble synthetic polymer-polyvinylpyrrolidone(PVP)/ aloevera(AV)-a natural biopolymer, as a composite for enhanced mechanical, antibacterial and biocompatible properties. The reinforcement of polymer has a significant function in increasing the mechanical property of the composite, whereas the incorporation of AV improves the antibacterial and biocompatibility. Phase composition, morphology, mechanical property, and hydrophilicity of CS-HAP/PVP/ AV biocomposite with different concentrations of PVP and AV were examined by Fourier transform infrared spectroscopy (FTIR), X-Ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray (SEM-EDX), Vickers microhardness tests, contact angle, respectively. Furthermore, the antibacterial efficiency of the composite is assessed using Escherichia coli (E coli) and Staphylococcus aureus (S aureus). The biocompatibility of HOS MG 63 cells on the CS-HAP/PVP/ AV composite is evaluated by MTT assay test. The obtained results evidence that the as-synthesized composite have appropriate mechanical, antibacterial and biocompatible properties. Overall, the combination of mechanical property of PVP, antibacterial and biocompatible property of AV in CS-HAP/PVP/AV, makes the composite a potential therapeutic material for various biomedical applications.

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“…Most of the synthetic methods require toxic organic solvents for the preparation of HAp. To minimize the usage of organic solvents, HAp nanoparticles have been synthesized using green extract as a template medium, which is highly advantageous because of its low cost, ecofriendly, and less toxicity 22,23 . On the other hand, several attempts have been made for the fabrication of biofunctional nanoparticles through simple and efficient synthesis method with specific morphological changes.…”

Section: Introductionmentioning

confidence: 99%

An innovative Azadirachta indica gum‐mediated synthesis of cocoon‐shaped nano‐AgHAp from Lamellidens marginalis shells

Ponnusamy

Sadhasivam

Kavitha

et al. 2020

Int J Applied Ceramic Tech

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In this work, the evaluations of noble nanoparticles for the structural and morphological characteristics are focused. The control of desired particles size and morphology for hydroxyapatite (HAp) and Ag‐substituted hydroxyapatite (AgHAp) derived from Lamellidens marginalis shells using Azadirachta Indica (AI) gum as a potential surfactant for the synthesis of stable nanoparticles are reported. The morphological change with respect to the concentration of AI gum is analyzed. The functional group (FTIR) and crystallographic (XRD) characterization of the HAp and AgHAp nanoparticles confirm the presence of HAp with desired apatite functional peaks. The morphological evaluation (FE‐SEM) exhibited the formation of cocoon‐shaped nanoparticles for the AI gum‐medicated synthesis. Higher AI gum concentration reduces the particle size along with the formation of unique surface morphology. The average diameter of the synthesized AgHAp nanoparticles was found to be ≤30 nm which is revealed from HR‐TEM. The bacterial investigation against bacterial strains substantiates the higher resistance of bacterial growth for Staphylococcus aureus was observed than Escherichia coli for the AgHAp particles. Hence, embedding silver nanoparticles in the HAp is an efficient approach to enhance the long‐term antibacterial effect of the orthopedic and dental applications.

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Synthesis and spectroscopic investigations of hydroxyapatite using a green chelating agent as template

Cited by 45 publications

References 32 publications

Physicochemical properties and antioxidant stability of microencapsulated marjoram extract prepared by co‐crystallization method

Physicochemical properties and antioxidant stability of microencapsulated marjoram extract prepared by co‐crystallization method

Biowaste‐derived hydroxyapatite reinforced with polyvinyl pyrrolidone/aloevera composite for biomedical applications

An innovative Azadirachta indica gum‐mediated synthesis of cocoon‐shaped nano‐AgHAp from Lamellidens marginalis shells

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