Physicochemical characterisation of β-chitosan from Sepioteuthis lessoniana gladius

Subhapradha, Namasivayam; Ramasamy, P.; Shanmugam, Vairamani; Madeswaran, Perumal; Srinivasan, Alagiri; Shanmugam, Annaian

doi:10.1016/j.foodchem.2013.03.098

Cited by 49 publications

(21 citation statements)

References 22 publications

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“…Stretching of the C-O-C was appeared around band 1152 cm -1 which agreed with Dong et al (2001); Zvezdova (2010); Liu et al (2013); Subhapradha et al (2013);Hafsa et al (2014) and Kaya et al (2015). According to the results of Dong et al (2001); Zvezdova (2010); Zhang et al (2011); Liu et al (2013) and Kaya et al (2015), the stretching of hydroxyl groups of C-OH was observed at bands around 1091cm -1 and 1035 cm -1 .…”

Section: Dynamic Light Scattering (Dls) Analysissupporting

confidence: 82%

“…The asymmetric stretching vibration of CH (-CH 2 ) was observed at peak around 2922 cm -1 , this result agreed with Dong et al (2001); Gylienë et al (2003); Zvezdova (2010); Liu et al (2013); Song et al (2013); Wanule et al (2014) and Kaya et al (2015). The detection of the bending vibration for NH (R-NH 2 ) at beak around peak 1596 cm -1 was matched with Jia and Xu (2001); Gylienë et al (2003); Liu et al (2013); Song et al (2013); Subhapradha et al (2013) and Kaya et al (2015). Corresponding with Dong et al (2001); Gylienë et al (2003); Zvezdova (2010); Liu et al (2013) and Kaya et al (2015), the bending vibration of CH (-CH 2 ) was represented at bands around 1424 cm -1 and 1381cm -1 .…”

Section: Dynamic Light Scattering (Dls) Analysissupporting

confidence: 80%

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Chitosan Nanoparticles Prepared from Lucilia Cuprina Maggots as Antibacterial Agent

Hassan¹,

Taher²,

Mohamed³

2016

JESP

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Chitosan were prepared from cuticle of Lucilia cuprina maggots with two steps; deproteinization and deacetylation. It was characterized with solubility and Fourier Transform Infrared spectroscopy (FT-IR). Chitosan was ball-milled to obtain the chitosan nanoparticles which characterized with dynamic light scattering (DLS) and transmission electron microscope (TEM). Chitosan nanoparticles with degree of deacetylation (DDA) 80.5% were showed antibacterial activities against Klebsiella pneumoniae and Bacillus subtilis. The mode of action of chitosan nanoparticles on the tested bacteria was studied by TEM. Leakage of some cell contents, cell deformation and rupture of cell were observed, therefore, the chitosan nanoparticles were observed to be a powerful antibacterial agent.

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Section: Dynamic Light Scattering (Dls) Analysissupporting

confidence: 82%

Section: Dynamic Light Scattering (Dls) Analysissupporting

confidence: 80%

Chitosan Nanoparticles Prepared from Lucilia Cuprina Maggots as Antibacterial Agent

Hassan¹,

Taher²,

Mohamed³

2016

JESP

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“…Three polymorphic forms (α, β and γ) of chitin have been discovered, which differ in the arrangement of the chains in the crystalline regions; that is, α-chitin has antiparallel chains, while β-chitin has parallel chains for, and γ-chitin is a combination of αand β-chitin [1,2]. α-Chitosan has been commercially manufactured from shrimp and crab shells and has been widely applied in various fields, whereas β-chitosan has been commonly obtained from squid pens and has a limited number of studies and applications, primarily due to its limited availability [5][6][7][8]. It was reported that the β-chitin crystalline structure was more modified than that of α-chitin after deacetylation, resulting in better properties such as degree of solubility, and swelling capacitity [1,7], which consequently…”

Section: Introductionmentioning

confidence: 99%

Impact of Crystalline Structural Differences Between α- and β-Chitosan on Their Nanoparticle Formation Via Ionic Gelation and Superoxide Radical Scavenging Activities

2019

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α- and β-Chitosan nanoparticles were obtained from shrimp shell and squid pen chitosan with different set of deacetylation degree (%DD) and molecular weight (MW) combinations. After nanoparticle formation via ionic gelation with sodium tripolyphosphate (TPP), the % crystallinity index (%CI) of the α- and β-chitosan nanoparticles were reduced to approximately 33% and 43% of the initial %CI of the corresponding α- and β-chitosan raw samples, respectively. Both forms of chitosan and chitosan nanoparticles scavenged superoxide radicals in a dose-dependent manner. The %CI of α- and β-chitosan and chitosan nanoparticles was significantly negatively correlated with superoxide radical scavenging abilities over the range of concentration (0.5, 1, 2 and 3 mg/mL) studied. High %DD, and low MW β-chitosan exhibited the highest superoxide radical scavenging activity (p < 0.05). α- and β-Chitosan nanoparticles prepared from high %DD and low MW chitosan demonstrated the highest abilities to scavenge superoxide radicals at 2.0–3.0 mg/mL (p < 0.05), whereas α-chitosan nanoparticles, with the lowest %CI, and smallest particle size (p < 0.05), prepared from medium %DD, and medium MW chitosan showed the highest abilities to scavenge superoxide radicals at 0.5–1.0 mg/mL (p < 0.05). It could be concluded that α- and β-chitosan nanoparticles had superior superoxide radical scavenging abilities than raw chitosan samples.

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“…The existence of free amino (−NH 2 ) groups in its structure makes chitosan a highly functional polysaccharide that can interact with many anionic polymers [7]. Some of the excellent features of chitosan are non-toxicity, homeostasis, antibacterial, biocompatibility and biodegradability [8,9]. These advantageous qualities make chitosan suitable for a variety of biomedical purposes such as wound healing [10][11][12][13], tissue engineering scaffolds [14][15][16][17], drug delivery systems [18] and biosensors [19].…”

Section: Introductionmentioning

confidence: 99%

UV irradiation- $$\hbox {H}_{2} \hbox {O}_{2}$$ H 2 O 2 system as an effective combined depolymerization technique to produce

et al. 2018

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UV irradiation hydrogen peroxide (H 2 O 2 ) system is used as an effective, easy and low-cost combined depolymerization technique to produce oligosaccharides from chitosan. UV-Vis spectroscopic studies explained that with increasing treatment time, the absorption of the depolymerized chitosan solution has increased, indicating the increase in the carbonyl and amino groups in their structure. Fourier transform infrared spectroscopy and nuclear magnetic resonance (1H NMR) analysis showed that the 1,4-β-d-glucoside linkages of chitosan are degraded without important changes in chemical structure of decomposed samples. X-ray diffraction patterns verified the polymerization of chitosan to produce oligomers, changing in structure from crystalline to amorphous. Viscosity-average molecular weight measurements of fragmented chitosan samples and MarkHouwink equation are used to demonstrate the efficiency of this depolymerization method. Finally, the obtained results ascertained that this combined method could produce water soluble chitosan with significant efficiency and no essential change in its chemical structure.

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Physicochemical characterisation of β-chitosan from Sepioteuthis lessoniana gladius

Cited by 49 publications

References 22 publications

Chitosan Nanoparticles Prepared from Lucilia Cuprina Maggots as Antibacterial Agent

Chitosan Nanoparticles Prepared from Lucilia Cuprina Maggots as Antibacterial Agent

Impact of Crystalline Structural Differences Between α- and β-Chitosan on Their Nanoparticle Formation Via Ionic Gelation and Superoxide Radical Scavenging Activities

UV irradiation- $$\hbox {H}_{2} \hbox {O}_{2}$$ H 2 O 2 system as an effective combined depolymerization technique to produce

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