Preparation and characterization of α-chitin from cicada sloughs

Sajomsang, Warayuth; Gonil, Pattarapond

doi:10.1016/j.msec.2009.11.014

Cited by 198 publications

(189 citation statements)

References 37 publications

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“…In this study, it was also observed that the thermal stability of the chitin isolated from the bat guano is higher than that of chitosan. The DTGmax values of the alpha chitin isolated from other organisms such as crab, shrimp or insects are around 380°C, and for chitosan it is 300°C [25][26][27]. The DTGmax values observed for chitin and chitosan in this study also show similarity with former studies.…”

Section: Tgasupporting

confidence: 86%

“…The DA value of the chitin was calculated and set as 128%. The DA value of completely acetylated chitin is 100% [27]. In this study the value observed is greater than 100%, which demonstrates that remnants of inorganic materials have not been completely removed from the chitin.…”

Section: Elemental Analysismentioning

confidence: 44%

“…It is noted that the chitin contents of the total body structure dry weight of insects including Agabus bipustulatus, Anax imperator, Bombyx mori, Holotrichia parallela, Hydrophilus piceus, Notonecta glauca, Ranatra linearis and silkworm chrysalides ranges from 10% to 20% among the different species [13,[24][25][26]. Alternatively, it was presented by Sajomsang and Gonil [27] that 36% of cicada sloughs were chitin. In this study it was found that the chitin content of bat guano was higher than the insect species investigated previously and the shell structures of Crustacea including prawn, shrimp, crab and lobster.…”

Section: Resultsmentioning

confidence: 99%

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Bat guano as new and attractive chitin and chitosan source

et al. 2014

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Introduction: Chitin is a biopolymer that forms the exoskeleton of arthropods, and is found in the cell walls of fungi. It has a wide range of uses in fields such as cosmetics, pharmacy, medicine, bioengineering, agriculture, textiles and environmental engineering based upon its nontoxic, ecofriendly, biocompability and biodegradability characteristics. Commercially, chitin is obtained from processing the outer skeleton of Crustacea such as shrimp, crab, prawn and crayfish after they have been consumed as food. The study aims to examine the nature of bat guano and to determine if it is a practical source of chitin, which has not been done previously.Results: In this study, the chitin content of dry bat guano samples was found to be 28%. The bat guano, which was collected from Karacamal Cave, came from the bat species Rhinolophus hipposideros. The chitosan yield of this chitin was 79%. The chitin produced from the bat guano was determined to be in the alpha form according to Fourier transform infrared spectroscopy (FTIR) results. The crystallinity of the chitin and chitosan samples was calculated as 85.49 and 58.51% respectively by X-ray crystallography (XRD) experiments. According to scanning electron microscope (SEM) micrographs, the chitin and chitosan structures were shaped like nanofibers. The thermogravimetric analysis (TGA) results showed that both chitin and chitosan had two step weight losses, which are characteristic of these materials. The nitrogen content of the chitin and chitosan was 6.47 and 7.3% respectively according to the elemental analysis results. Conclusions:In this research, it has been observed that bat guano can be considered to be an alternative source of chitin and chitosan to crab, shrimp, crayfish and krill.

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Section: Tgasupporting

confidence: 86%

Section: Elemental Analysismentioning

confidence: 44%

Section: Resultsmentioning

confidence: 99%

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Bat guano as new and attractive chitin and chitosan source

et al. 2014

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“…In literature studies, it was reported that the dry weight chitin contents of crustaceans vary between 13% -42% [18]. Similarly, it was determined that dry weight chitin contents of some insect species varied between 2.59% and 36% [17,[19][20][21][22][23]. While, the chitin contents of L. vellereus and P. ribis are lower than crustaceans, they are higher than that of some insect species.…”

Section: Chitin Contentmentioning

confidence: 99%

Chitin extraction and chitosan production from cell wall of two mushroom species (Lactarius vellereus and Phyllophora ribis)

Erdoğan

Kaya

Akata

2017

AIP Conference Proceedings

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Abstract.Chitin is an important polysaccharide found as supporting material in the cell wall of mushrooms. In this study, chitin and chitosan were obtained from the cell wall of two different mushroom species using chemical method and physicochemically characterized. The dry weight chitin contents of the mushroom species were determined as 11.4% for Lactarius vellereus and 7.9% for Phyllophora ribis. Chitosan yields of the chitins isolated from L. vellereus and P. ribis were 73.1% and 75.3%, respectively. While, the maximum degradation temperatures of L. vellereus and P. ribis chitins were found to be 354°C and 275°C by thermogravimetric analysis (TGA), the maximum degradation temperature of the chitosans obtained from these chitins were recorded as 262°C and 229°C, respectively. The crystalline index values of L. vellereus and P. ribis chitins were calculated as 64% and 49%, respectively according to the X-ray diffraction analysis (XRD) results. The scanning electron microscopy (SEM) indicated that there were no nanofiber or nanopores on the surface of the chitins and chitosans obtained from these two mushroom species. The results of this study revealed that L. vellereus and P. ribis had higher chitin contents than some other insects and mushroom species recorded in the literature and these species may be used as a potential chitin sources.

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“…The presence of the more or less bulky substituent weakens the hydrogen bonds of chitosan; therefore, N-alkyl chitosans swell in water inspite of the film forming property of chitosan. Chitosan is more versatile in comparision to chitin due to the presence of amino groups at the C-2 positions [9].…”

Section: Chitin and Chitosan Processingmentioning

confidence: 99%

Extraction and Characterization of Chitin and Chitosan from Achatinodes

Natarajan¹,

Kalyanasundaram²,

Ravi³

2017

Nat Prod Chem Res

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In view of the increasing littering of the river banks by shells of crustaceans, a study was carried out to investigate the extraction and characterization of chitin and chitosan from apple snail. Chitin and chitosan was extracted and characterized from apple snail the conventional methods of pretreatment, demineralization, deprotienization and deacetylation. The results obtained revealed that carbon nitrogen ratio of the chitosan extracted was 5.7 with a degree of deacetylation of 59.69% and 58.66% calculated from the elemental analysis and the FTIR spectra of chitosan respectively. The FTIR spectra for chitosan gave a characteristic-NH 2 band of 2921.48 cm -1 and a carbonyl group band of 2523.11 cm -1 . The mussel shell was discovered to contain a mineral content of 48.43% and a chitin composition was found to be 18.44%.

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Preparation and characterization of α-chitin from cicada sloughs

Cited by 198 publications

References 37 publications

Bat guano as new and attractive chitin and chitosan source

Bat guano as new and attractive chitin and chitosan source

Chitin extraction and chitosan production from cell wall of two mushroom species (Lactarius vellereus and Phyllophora ribis)

Extraction and Characterization of Chitin and Chitosan from Achatinodes

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