Abstract:
:A set of fungal polysaccharide samples was characterised by elemental analysis and FTIR spectroscopy and compared with reference chitins, chitosans and β-D-glucans. The nitrogen to carbon (N/C) values and FTIR spectra were used to compare the samples based on their composition. It was found that the N/C ratio correlates well with deacetylation degree (DD) of chitosans and chitin/glucan ratio R(chit) of fungal chitin – β-D-glucan complexes with the exception of some samples having significant nitrogen and/or carbon admixtures. FTIR spectroscopy was indicative for the N-acetylation of chitins (chitosans) as well as for the chitin (chitosan) contribution to fungal polysaccharide preparations. Multivariate analyses of the FTIR data (HCA, PCA) discriminated samples and reference materials into several clusters depending on their similarity. Chitosan lactates, chitosan – β-D-glucans and chitin – β-D-glucans of high and low amounts of chitin were successfully discriminated from the reference polysaccharides and from each other. The proposed procedures based on the N/C ratio and multivariate analyses of FTIR spectra may be used in screening fungal polysaccharide preparations.
journal_name
Int J Biol Macromoljournal_title
International journal of biological macromoleculesauthors
Gomba GK,Synytsya A,Švecová P,Coimbra MA,Čopíková Jdoi
10.1016/j.ijbiomac.2015.05.059subject
Has Abstractpub_date
2015-09-01 00:00:00pages
271-81eissn
0141-8130issn
1879-0003pii
S0141-8130(15)00400-6journal_volume
80pub_type
杂志文章abstract::In the current study, chia mucilage composite films with starch nanocrystals (3% and 6%) were produced. The films were analyzed physicochemically (FT-IR, AFM, TGA, DSC), mechanically (Tensile strength and contact angle) and biologically (antimicrobial, antioxidant and cytotoxicity) properties. The incorporation of sta...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.04.146
更新日期:2019-07-15 00:00:00
abstract::It is of great clinical significance to design wound dressing materials with combined excellent wound healing properties and superior capability to suppress hypertrophic scar formation. This study aimed to examine if and how the cationicity of chitosan would affect the hypertrophic scar-related outcomes, through prepa...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.03.161
更新日期:2020-07-01 00:00:00
abstract::Three strains of Spirulina platensis isolated from different locations showed capability of synthesizing poly(3-hydroxybutyrate) [P(3HB)] under nitrogen-starved conditions with a maximum accumulation of up to 10 wt.% of the cell dry weight (CDW) under mixotrophic culture conditions. Intracellular degradation (mobiliza...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2005.05.002
更新日期:2005-08-01 00:00:00
abstract::In order to investigate the effects of exogenous V-type starch on the structural properties and dispersion stability of lotus seed starch after autoclave treatment, the crystal structure, molecular structure, and dispersion stability were analyzed and discussed, as well as compared with exogenous A-type and B-type sta...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2021.01.175
更新日期:2021-01-29 00:00:00
abstract::Bifunctional biotinylated thiosemicarbazone dextran-coated iron oxide Nanoparticles (NPs) were fabricated. Aldehyde groups of the oxidized dextran-coating layer were utilized to conjugate biotin as a tumor-targeting agent and thiosemicarbazide as a cation chelator on the surface of NPs. The final product was character...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.01.208
更新日期:2020-04-01 00:00:00
abstract::Protic ionic liquids have been proposed as effective solvents for the selective extraction of lignin from wood. In this work, the protic ionic liquid 1-methylimidazolium chloride has been used to extract lignin at different biomass loadings, temperatures, and times to understand the influence of treatment severity on ...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.04.194
更新日期:2020-08-15 00:00:00
abstract::The impacts of chitosan with different molecular weight on the formation mechanism, structural characteristics and encapsulating properties of the zein-chitosan nanocomplexes were investigated. The results of dynamic light scattering showed that the mean size of nanocomplexes was increased and became more highly posit...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.07.245
更新日期:2020-12-01 00:00:00
abstract::Chitosan-based hydrogel nanoparticles provide a higher brain concentration of methotrexate (MTX) following IV administration in comparison with the drug's simple solution. The present study investigates the mechanism of this phenomenon, focusing on the possible role of P-gp. A previously developed MTX containing chito...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2018.12.093
更新日期:2019-03-15 00:00:00
abstract::Antioxidant effects of lentinan on LPS induced inflammatory response in intestine of juvenile taimen were evaluated, and its prebiotic-like efficacy on intestinal microbiota was also investigated. The results showed that LPS decreased the activities of antioxidant enzymes and increased the expression levels of inflamm...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2018.09.121
更新日期:2019-01-01 00:00:00
abstract::Despite the progress in the development of hemostatic products, efficient treatment solutions to control hemorrhage upon wounding are still necessary. Chitosan (CS) is a natural hydrogel-forming polysaccharide, easy to modify for specific applications. Inorganic compounds in turn possess documented hemostatic properti...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.06.187
更新日期:2020-11-01 00:00:00
abstract::The ever-increasing applications of enzymes are limited by the relatively poor performance in harsh processing conditions. As a result, there are constant innovations in immobilization protocols for improving biocatalyst activity and stability. Bacterial spores are cheap to generate and highly resistant to environment...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章,评审
doi:10.1016/j.ijbiomac.2020.10.171
更新日期:2021-01-01 00:00:00
abstract::In most of the recent research on emulsions related to food products containing protein-polysaccharide interactions established via the Maillard reaction have been used as emulsifiers. Key challenges in such studies include long reaction times, uncontrollable extent of reaction, and protein denaturation and aggregatio...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.09.007
更新日期:2020-12-01 00:00:00
abstract::To improve the deproteinization (DP) efficacy of shrimp shell powders (SSP) for preparing chitin, Serratia marcescens B742 mutants were prepared using 2% diethyl sulfate (DES), UV-irradiation, and/or microwave heating treatments. Both single-stage and multi-stage mutations were investigated for optimizing S. marcescen...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2014.05.058
更新日期:2014-08-01 00:00:00
abstract::In this research casting method was used to prepare potato starch based bio-nanocomposite films with halloysite nanoclay as the reinforcing materials. The composition included potato starch with 40% (w/w) of a mixture of sorbitol/glycerol (weight ratio of 3 to 1as plasticizer) with nanoclay (0-5% w/w). The films were ...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2014.04.009
更新日期:2014-06-01 00:00:00
abstract::In this study, we fabricated a series of novel sodium alginate/ZnO hydrogel beads to optimize the release profile of curcumin (Cur) and to avoid the burst release associated with pure hydrogels, which were used to mitigate the weaknesses of Cur, such as rapid physiological clearance and sensitivity to ultraviolet (UV)...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2018.10.121
更新日期:2019-01-01 00:00:00
abstract::We have already found that an amidinated chitin, which was prepared by the reaction of a partially deacetylated chitin with N,N-dimethylacetamide dimethyl acetal, was converted into an amidinium chitin bicarbonate with nanofiber morphology by CO2 gas bubbling and ultrasonic treatments in water. In this study, we perfo...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2016.06.019
更新日期:2016-10-01 00:00:00
abstract::Microalgae have recently been recognized as a valuable resource for various applications. Phaeodactylum tricornutum is a diatom that lives in marine water and has an unusually high content of lipids. In this study, we added P. tricornutum into a gelatin dope solution to examine the effect of this diatom using electros...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2013.11.004
更新日期:2014-02-01 00:00:00
abstract::Starch molecular structural effects in duckweed (Lemna minor and Landoltia punctata) controlling in vitro enzymatic degradation kinetics was studied. The molecular size distributions of fully-branched starches and the chain length distributions (CLDs) of enzymatically debranched duckweed starches were obtained using s...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.07.206
更新日期:2019-10-15 00:00:00
abstract::Arginine kinase (AK) plays a key role in ATP buffering systems of tissues and nerves that display high and variable rates of ATP turnover and is widely distributed in invertebrate animals. The enzyme is also found in unicellular organisms, protists and bacteria, but its occurrence is intermittent among species. The AK...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2013.02.023
更新日期:2013-06-01 00:00:00
abstract::Methotrexate loaded chitin nanogel (MCNG) was formulated for its topical use in psoriasis. MCNG was characterized by DLS, TEM and FTIR. The MCNG particles were spherical in shape with size of 196±14nm, having surface charge of +9.21±0.42 mv. MCNG exhibited greater swelling and drug release at acidic pH than neutral an...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2017.10.112
更新日期:2018-04-15 00:00:00
abstract::Serine protease inhibitors, inhibit serine proteases either partially or completely after forming complexes with their respective proteases. Protease actions are significant for many physiological pathways found in living forms and any anomalies may lead to numerous physiological complications. Each cell or organism h...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章,评审
doi:10.1016/j.ijbiomac.2017.09.115
更新日期:2018-02-01 00:00:00
abstract::In the present study, pear polyphenol oxidase (PPO) was purified, immobilized and applied for the synthesis of theaflavin-3,3'-digallate (TF3). Firstly, PPO of pear (Pyrus bretschneideri Rehd cv. Huangguan) was purified 24.36-fold in specific activity with a recovery of 6.77% by sequential use of precipitation with 70...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2016.10.072
更新日期:2017-01-01 00:00:00
abstract::The development of antioxidant polymers through the chemical conjugation of natural polyphenols onto polysaccharides has important applications in biomedical, pharmaceutical, food, and cosmetic fields. Due to their labile characteristics, the covalent conjugation of polyphenols while retaining antioxidant properties h...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2017.03.173
更新日期:2017-08-01 00:00:00
abstract::The Ca(2+)-induced conformational changes in calmodulin (CaM) were monitored by Fourier transform infrared spectroscopy (FT-IR) at different molar ratios of Ca(2+) to CaM. The results show that these changes occur in two distinctive transitions. The first transition involves significant changes in the overall secondar...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2013.02.004
更新日期:2013-05-01 00:00:00
abstract::Despite impressive progress of macromolecular encapsulation technique based on hyperbranched polymer (HP), the use of natural HP for guest encapsulation has rarely been reported. Herein, we present the simple synthesis of amphiphilic PGP-DC from natural peach gum polysaccharide (PGP) and demonstrate that the PGP-DC ca...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.03.151
更新日期:2020-07-01 00:00:00
abstract::The objective of this study was to improve the compatibility between poly(lactic acid) (PLA) and thermoplastic starch (TPS) in PLA/TPS blown films by incorporating oligo(lactic acid)-grafted starch (OLA-g-starch) as a compatibilizer. OLA-g-starch with a degree of substitution of 1.2 and degree of polymerization of 2.0...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2020.05.178
更新日期:2020-10-01 00:00:00
abstract::In this present study, ternary nanocomposite films of chitosan/starch/halloysite nanotubes (ChSHT) were fabricated by solution casting process. The ternary nanocomposite films were characterized by using various techniques such as Fourier transform infrared (FTIR), X-ray Diffraction (XRD), water contact angle, water a...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2019.01.047
更新日期:2019-04-15 00:00:00
abstract::It has been established that the equilibrium between duplex and G-quadruplex of the nuclease hypersensitivity element III1 (NHE III1) in human c-myc promoter is linked with this gene's transcription. Using NMR and ESI-MS, we have found a pyrene derivative, DMAPP, is able to modulate this equilibrium and, thus, might h...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2011.05.024
更新日期:2011-12-01 00:00:00
abstract::Chitosan nanoparticles (CS-NPs) and chitosan/polyacrylic acid hydrogel nanoparticles (CS/PAA-HNPs) were obtained by ionic gelation with tripolyphosphate anions and copolymerization of CS with acrylic acid (AA), respectively. The prepared NPs were loaded by different concentrations of copper (1, 2 and 3% with respect t...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2018.11.155
更新日期:2019-02-15 00:00:00
abstract::A novel GH1 β-glucosidase (EaBgl1A) from a bacterium isolated from Antarctica soil samples was recombinantly overexpressed in Escherichia coli cells and characterized. The enzyme showed unusual pH dependence with maximum activity at neutral pH and retention of high catalytic activity in the pH range 6 to 9, indicating...
journal_title:International journal of biological macromolecules
pub_type: 杂志文章
doi:10.1016/j.ijbiomac.2015.09.018
更新日期:2016-01-01 00:00:00