Air drying modelling of Mastocarpus stellatus seaweed a source of hybrid carrageenan

Arufe, Santiago; Torres, M.D.; Chenlo, F.; Moreira, Ramón

doi:10.1007/s00231-017-2117-1

Cited by 12 publications

(7 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results were observed for different brown algae 6, 9–11, 18, 19 and for a red alga 23. As intuited on the drying kinetics, the influence of the air velocity at 40 °C is particular.…”

Section: Resultssupporting

confidence: 81%

“…Contrary to the drying air temperature, the impact of the air velocity on the apparent diffusivity was not yet studied. Most of the published results dedicated to the drying of macroalgae were performed at relatively low velocities of 1.5–2 m s −1 6, 9–11, 18, 19, 23. Only two studies were carried out at higher velocities, i.e., 5–10 m s −1 24, 25.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Mathematical Modeling of Air Impingement Drying of the Brown Algae Sargassum muticum (Fucales)

et al. 2021

View full text Add to dashboard Cite

The impact of air velocity and temperature on the drying curves of the invasive brown alga Sargassum muticum was evaluated. An air impingement dryer was applied at five air velocities and four air temperatures. The equilibrium moisture content was properly modeled by Oswin, Halsey, and GAB models. Fick's diffusional model was employed to identify the apparent moisture diffusivity. The variations of the diffusivity versus temperature and velocity were determined. Three semi‐empirical expressions, namely, Page, two‐term, and Henderson‐Pabis modified equations were selected to fit the drying kinetics. The two‐term equation was the most appropriate to model the experimental data.

show abstract

Section: Resultssupporting

confidence: 81%

Section: Resultsmentioning

confidence: 99%

Mathematical Modeling of Air Impingement Drying of the Brown Algae Sargassum muticum (Fucales)

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The kappa/iota hybrid carrageenan gels can have many applications in different industries [16]. It could be used in the dairy industry for cakes, in cosmetic for creams or lotions, in the pharmaceutical industry for semi-synthetic antibiotic production, in chemicals for paints or shoe polish, in experimental medicine for the testing of anti-inflammatory drugs or in biotechnology to immobilize cells/enzymes, among many others [17,18,19].…”

mentioning

confidence: 99%

“…MAE allows a fast and uniform extraction, compact equipment, fast start-up, short time, less solvent and energy, which can be explained by the effect of microwaves on molecules by ionic conduction and dipole rotation [25,26]. Some authors [27] studied the microwaveassisted alkaline modification of red seaweed galactans to enhance their gelation behavior, accelerating the reaction several times with respect to that performed with conventional heating [18,23]. Later works indicated the integrity of the polysaccharides treated by MAE was not affected by this procedure [28].…”

mentioning

confidence: 99%

The microwave assisted extraction sway on the features of antioxidant compounds and gelling biopolymers from Mastocarpus stellatus

2020

View full text Add to dashboard Cite

Microwave assisted water extraction of hybrid carrageenan and antioxidant compounds from Mastocarpus stellatus red alga was first proposed to recover biopolymers with specific rheological properties, saving time, avoiding chemicals and enhancing extraction yields when compared with conventional treatments. The hybrid carrageenans, precipitated from the liquid fractions recovered after microwave assisted water extraction were analyzed by Fourier transform infrared attenuated total reflectance, high-performance size-exclusion chromatography and rheology. The corresponding soluble extracts were also characterized by total phenolic content, antioxidant capacity, proteins, sulfate and carbohydrate content. The highest phenolic, antioxidant capacity and sulfate content were observed at 190°C, without notable effect of heating time between 3 and 6 min. In contrast, a clear impact of both microwave heating temperature and time on the molecular weight distribution of hybrid carrageenans as well as on the viscoelastic behavior of formulated hydrogels was identified, being the strongest hydrogels achieved at 170°C for 6 min. It should be highlighted that all proposed hydrogels exhibited stable mechanical properties in the absence of syneresis for a month of cold storage, except those made with biopolymers obtained with the mildest extraction conditions (3 min at 70°C).

show abstract

“…Carrageenans are classified under hydrocolloids sourced from certain red seaweeds, the Rhodophyceae class algae that belong to the genera Hypnea, Eucheuma, Gigartina, Chondrus and Lridaea 9,10 . k-Carrageenan is specially procured from the extraction of the Kappaphycus alvarezii tropical seaweed, generally known as Eucheuma cottonii.…”

Section: Introductionmentioning

confidence: 99%

Modification of natural hydrocolloid as disintegrant in aceclofenac tablet formulation

Gupta

Manigauha

2021

J. Drug Delivery Ther.

View full text Add to dashboard Cite

The purpose of present exploration was to modify kappa (k)-Carrageenan, by crosslinking, and assessed it as a tablet disintegrant to strengthen the solubility of the drug (aceclofenac) in tablet formulation. Modified k-Carrageenan was synthesized by reacting it with epichlorhydrin at heterogenous conditions. The swelling action of the product was investigated in order to optimize reaction circumstances for chemical cross-linking. Best modified k-Carrageenan procured by optimizing the reaction conditions and it was characterized for swelling index, particle size distribution, solubility, viscosity, gel strength and Fourier transform infrared spectroscopy (FTIR). Influence of modified k-Carrageenan on dissolution profile of therapeutic was also investigated along with other evaluation parameters. Modified k-Carrageenan exhibiting significant swelling index which is comparable to that of superdisintegrants. On comparative investigation as a tablet disintegrant by preparing anhydrous dicalcium phosphate tablet, modified k-Carrageenan showed disintegration time less than 20 seconds. Dissolution of aceclofenac (Class II) tablet formulaion utilizing modified k-Carrageenan was comparable with commercially available superdisintegrants. Faster dissolution of the accommodated drug was achieved with modified k-Carrageenan which was comparable with dissolution of the tablet formulation containing other superdisintegrants. The competent concentration of k-Carrageenan was found to be 5-15% as tablet disintegrant. Modified k-Carrageenan might be encouraging tablet disintegrant in fast dissolving formulations and can be worn in direct compression method. Keywords: k-Carageenan. Epichlorhydrin. Aceclofenac. Crosslinking. Superdisintegrant

show abstract

Air drying modelling of Mastocarpus stellatus seaweed a source of hybrid carrageenan

Cited by 12 publications

References 34 publications

Mathematical Modeling of Air Impingement Drying of the Brown Algae Sargassum muticum (Fucales)

Mathematical Modeling of Air Impingement Drying of the Brown Algae Sargassum muticum (Fucales)

The microwave assisted extraction sway on the features of antioxidant compounds and gelling biopolymers from Mastocarpus stellatus

Modification of natural hydrocolloid as disintegrant in aceclofenac tablet formulation

Contact Info

Product

Resources

About