Found 3 records.
Displayed records from 1 to 3
Expand all records
Collapse all records
Show all as text (SweetDB notation)
Show all graphically (SNFG notation)
Ahmad FB, Akmal MHM, Amran A, Hasni MH
Characterization of chitosan from extracted fungal biomass for piezoelectric application
IOP Conference Series: Materials Science and Engineering 778 (2020)
ID 012034
Aspergillus oryzae
(NCBI TaxID 5062,
species name lookup)
Taxonomic group: fungi / Ascomycota
(Phylum: Ascomycota)
Organ / tissue: cell wall
Publication DOI: 10.1088/1757-899X/778/1/012034Journal NLM ID: 101730509Publisher: Bristol: IOP Pub.
Correspondence: farahahamad
iium.edu.my
Institutions: Department of Biotechnology Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia, Department of Science in Engineering, Faculty of Engineering, International Islamic University Malaysia, Kuala Lumpur, Malaysia
Conventional piezoelectric materials from piezoceramic and polymer are non-renewable and could be toxic in nature, which limit its application in biomedical application. Chitosan, which is a natural polysaccharide, has the potential to be used as piezoelectric biomaterial which may provide the solution for toxicity, non-biodegradability and non-biocompatibility issues of conventional piezoelectric materials. Chitosan may be produced sustainably through extraction from fungal cell walls. This study aims to characterize chitosan extracted from fungi Aspergillus oryzae for piezoelectric application. A. oryzae was cultivated on modified Sabouraud dextrose broth medium. Alkaline treatment was performed on fungal biomass using 1 M NaOH for extraction and deacetylation of chitosan at 100 °C for 1 hour. Fourier transform infrared spectroscopy results showed that the broad absorption band that corresponds to hydrogen bonded O-H stretching vibrations overlapped with N-H stretching band. X-ray diffraction analysis confirmed the semicrystalline nature of the chitosan sample. Piezoelectric properties can be attributed to intrinsic molecular polarization arising from the noncentrosymmetric crystal structure.
chitosan, Aspergillus oryzae, piezoelectric material
Structure type: structural motif or average structure
Location inside paper: abstract, Fig. 1
Trivial name: chitosan
Compound class: O-polysaccharide, cell wall polysaccharide, glucan, polysaccharide
Contained glycoepitopes: IEDB_135813,IEDB_137340,IEDB_141807,IEDB_151531,IEDB_153212,IEDB_241099,IEDB_423114,IEDB_423150,SB_74,SB_85
Methods: deacetylation, IR, X-ray, alkaline hydrolysis, extraction, cell growth, precipitation, centrifugation, filtration, FESEM, vacuum filtration, deproteinization
Related record ID(s): 44877, 44886, 46311, 46570, 46683, 48760, 48774, 49133, 49502, 49512, 49524, 49653, 50016, 50303, 50304, 50307, 50308, 50310, 50311, 50314, 50315, 50317, 50319, 50320
NCBI Taxonomy refs (TaxIDs): 5062Reference(s) to other database(s): GTC:G97099AY
Show glycosyltransferases
There is only one chemically distinct structure:
Expand this record
Collapse this record
Savin S, Craciunescu O, Oancea A, Ilie D, Ciucan T, Antohi LS, Toma A, Nicolescu A, Deleanu C, Oancea F
Antioxidant, cytotoxic and antimicrobial activity of chitosan preparations extracted from Ganoderma lucidum mushroom
Chemistry and Biodiversity 17(7) (2020)
ID e2000175
Ganoderma lucidum
(NCBI TaxID 5315,
species name lookup)
Taxonomic group: fungi / Basidiomycota
(Phylum: Basidiomycota)
Organ / tissue: cell wall
NCBI PubMed ID: 32333466Publication DOI: 10.1002/cbdv.202000175Journal NLM ID: 101197449Publisher: Verlag Helvetica Chimica Acta
Correspondence: Craciunescu O <oana_craciunescu2009
yahoo.com>; office
incdsb.ro
Institutions: National Institute of Research and Development for Biological Sciences, Bucharest, Romania, ''Petru Poni'' Institute of Macromolecular Chemistry, Iasi, Romania, National Institute for Research and Development in Chemistry and Petrochemistry - ICECHIM, Bucharest, Romania
Two chitosan extracts were prepared by chemical and enzymatic treatment of Ganoderma lucidum mushroom, as an alternative source to crustacean shells. The molecular weight of the enzymatic extract was lower than that of the chemical one and of shrimp chitosan, as determined by viscosity measurements. Characteristic signals were identified in the 1 H-NMR spectra and high deacetylation degree indicated good physico-chemical properties for both mushroom chitosan extracts. The scavenging capacity of mushroom chitosan extracts was moderate against the synthetic radicals of 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH), but higher values were observed for the enzymatic extract, compared to the chemical extract and shrimp chitosan. In vitro cytotoxicity was evaluated in L929 mouse fibroblast cell lines and the results of MTT assay showed good cytocompatibility in the tested range of concentrations. The growth of Gram-positive bacteria was inhibited more than Gram-negative bacteria in the presence of mushroom chitosan extracts, in particular by the chemical one, indicating their efficiency as antimicrobial agents. All these results strengthen the evidence of mushroom polysaccharide preparations availability for biomedical applications.
extraction, deacetylation, fungi, radical scavenging activity, α-amylase
Structure type: homopolymer
Location inside paper: Fig. 1, chitin
Trivial name: chitin
Compound class: O-polysaccharide, cell wall polysaccharide, glucan, polysaccharide, chitin
Contained glycoepitopes: IEDB_135813,IEDB_137340,IEDB_141807,IEDB_151531,IEDB_153212,IEDB_241099,IEDB_423114,IEDB_423150,SB_74,SB_85
Methods: 1H NMR, alkaline hydrolysis, enzymatic digestion, extraction, antioxidant activities, cell viability assay, cytotoxicity assay, precipitation, antimicrobial assay, centrifugation, optical density measurement, deproteinization
Enzymes that release or process the structure: α-amylase
Related record ID(s): 40760, 40800, 41831, 49862, 50302, 50305, 50306, 50309, 50312, 50313, 50317, 50318, 111874, 121703, 131817, 139821, 143656, 147987, 149876
NCBI Taxonomy refs (TaxIDs): 5315Reference(s) to other database(s): GTC:G97099AY, CCSD:
46067, CBank-STR:5851, GenDB:KF905651
Show glycosyltransferases
There is only one chemically distinct structure:
Expand this record
Collapse this record
Savin S, Craciunescu O, Oancea A, Ilie D, Ciucan T, Antohi LS, Toma A, Nicolescu A, Deleanu C, Oancea F
Antioxidant, cytotoxic and antimicrobial activity of chitosan preparations extracted from Ganoderma lucidum mushroom
Chemistry and Biodiversity 17(7) (2020)
ID e2000175
Ganoderma lucidum
(NCBI TaxID 5315,
species name lookup)
Taxonomic group: fungi / Basidiomycota
(Phylum: Basidiomycota)
Organ / tissue: cell wall
NCBI PubMed ID: 32333466Publication DOI: 10.1002/cbdv.202000175Journal NLM ID: 101197449Publisher: Verlag Helvetica Chimica Acta
Correspondence: Craciunescu O <oana_craciunescu2009
yahoo.com>; office
incdsb.ro
Institutions: National Institute of Research and Development for Biological Sciences, Bucharest, Romania, ''Petru Poni'' Institute of Macromolecular Chemistry, Iasi, Romania, National Institute for Research and Development in Chemistry and Petrochemistry - ICECHIM, Bucharest, Romania
Two chitosan extracts were prepared by chemical and enzymatic treatment of Ganoderma lucidum mushroom, as an alternative source to crustacean shells. The molecular weight of the enzymatic extract was lower than that of the chemical one and of shrimp chitosan, as determined by viscosity measurements. Characteristic signals were identified in the 1 H-NMR spectra and high deacetylation degree indicated good physico-chemical properties for both mushroom chitosan extracts. The scavenging capacity of mushroom chitosan extracts was moderate against the synthetic radicals of 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and 1,1-diphenyl-2-picrylhydrazyl (DPPH), but higher values were observed for the enzymatic extract, compared to the chemical extract and shrimp chitosan. In vitro cytotoxicity was evaluated in L929 mouse fibroblast cell lines and the results of MTT assay showed good cytocompatibility in the tested range of concentrations. The growth of Gram-positive bacteria was inhibited more than Gram-negative bacteria in the presence of mushroom chitosan extracts, in particular by the chemical one, indicating their efficiency as antimicrobial agents. All these results strengthen the evidence of mushroom polysaccharide preparations availability for biomedical applications.
extraction, deacetylation, fungi, radical scavenging activity, α-amylase
Structure type: structural motif or average structure ; 43020-68110
Location inside paper: Fig. 1, chitosan
Trivial name: chitosan
Compound class: O-polysaccharide, cell wall polysaccharide, glucan, polysaccharide
Contained glycoepitopes: IEDB_135813,IEDB_137340,IEDB_141807,IEDB_151531,IEDB_153212,IEDB_241099,IEDB_423114,IEDB_423150,SB_74,SB_85
Methods: 1H NMR, alkaline hydrolysis, enzymatic digestion, extraction, antioxidant activities, cell viability assay, cytotoxicity assay, precipitation, antimicrobial assay, centrifugation, optical density measurement, deproteinization
Biological activity: Chitosan exerted antioxidant activity and inhibition of bacterial growth in cultures of S. aureus and P. aeruginosa. It was noncytotoxic in a culture of mouse fibroblasts in a wide range of concentrations
Enzymes that release or process the structure: α-amylase
Related record ID(s): 44877, 44886, 46311, 46570, 46683, 48760, 48774, 49133, 49502, 49512, 49524, 49653, 50016, 50301, 50303, 50304, 50307, 50308, 50310, 50311, 50314, 50315, 50316, 50319, 50320
NCBI Taxonomy refs (TaxIDs): 5315Reference(s) to other database(s): GTC:G97099AY
Show glycosyltransferases
NMR conditions: in TSP / 99.5%D2O / 0.5%HCl at 298(H) K
[as TSV]
1H NMR data: present in publication
|
There is only one chemically distinct structure:
Expand this record
Collapse this record
Total list of record IDs on all result pages of the current query:
Execution: 7 sec
report error