Thermal stability of spent coffee ground polysaccharides: Galactomannans and arabinogalactans

Simões, Joana; Maricato, Élia; Nunes, Fernando M.; Domingues, Rosário M.; Coimbra, Manuel A.

doi:10.1016/j.carbpol.2013.09.042

Cited by 32 publications

(13 citation statements)

References 22 publications

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“…The decrease of (1 →4) -linked Glcp detected by methylation analysis after thermal processing of both OS and PS samples can have a contribution of 1,6anhydroglucose residues formed at the reducing end (Nunes, Reis, Domingues, & Coimbra, 2006;Simões, Maricato, Nunes, Domingues, & Coimbra, 2014).…”

Section: Polysaccharides (Ps)mentioning

confidence: 99%

Formation of type 4 resistant starch and maltodextrins from amylose and amylopectin upon dry heating: A model study

Nunes

Lopes

Moreira

et al. 2016

Carbohydrate Polymers

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Starch is one of the main components of human diet. During food processing, starch is submitted to high temperatures in the presence or absence of water. Thus, the main goal of this work was to identify structural modifications caused by dry heating in starch polysaccharides (amylose and amylopectin) and structurally related oligosaccharides, maltotetraose (M4) and glucosyl-maltotriose (GM3), simulating processing conditions. The structural modifications were evaluated by methylation analysis, electrospray mass spectrometry (ESI-MS), tandem mass spectrometry (ESI-MS/MS) and anionic chromatography after in vitro enzymatic digestion. Dry heating promoted dehydration, depolymerization, as well as changes in Glc glycosidic linkage positions and anomeric configuration. In oligosaccharides, polymerization was also observed. All these changes resulted in a lower in vitro digestibility, suggesting that dry heating of starch polysaccharides and related oligosaccharides may be associated with the formation of type 4 resistant starch and maltodextrins, non-digestible carbohydrates that are responsible for beneficial effects in human intestinal tract.

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Section: Polysaccharides (Ps)mentioning

confidence: 99%

Formation of type 4 resistant starch and maltodextrins from amylose and amylopectin upon dry heating: A model study

Nunes

Lopes

Moreira

et al. 2016

Carbohydrate Polymers

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“…They are high molecular weight polysaccharides and show a low level of branching. Nonetheless, the roasting process influences on the depolymerization and debranching of galactomannans, increasing thus, their extraction and solubility in water (Simões, Maricato, Nunes, Domingues, & Coimbra, 2014). On the other hand, coffee type II arabinogalactans are also high molecular weight polysaccharides, highly branched, composed of a backbone of ␤-(1 → 3)-linked galactose residues and side chains of galactose and arabinose residues (Passos & Coimbra, 2013).…”

Section: Introductionmentioning

confidence: 99%

Extraction of polysaccharides by autohydrolysis of spent coffee grounds and evaluation of their antioxidant activity

Ballesteros

Teixeira

Mussatto

2017

Carbohydrate Polymers

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The extraction of polysaccharides by autohydrolysis of spent coffee grounds (SCG) was studied. Experimental assays were performed using different temperatures (160-200°C), liquid/solid ratios (5-15ml water/g SCG) and extraction times (10-50min) in order to determine the conditions that maximize the extraction of polysaccharides with high antioxidant activity. Autohydrolysis was demonstrated to be an efficient technique to recover antioxidant polysaccharides from SCG. The best process conditions consisted in using 15ml water/g SCG, during 10min at 160°C. The polysaccharides obtained under these conditions were mainly in the form of galactomannans and arabinogalactans. They presented high antioxidant activity (assessed by four different methods), were thermostable in a large range of temperature, and had a typical carbohydrate pattern, being of interest for industrial applications, mainly in the food area.

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“…SCG is rich in sugars and contains about 45.3% of them in dry mass basis [ 35 ]. Galactomannan, responsible for the high viscosity of coffee extract, is the major polysaccharide in SCG that forms about 20–30% dry matter and is water-insoluble [ 36 , 37 ]. SCG can be used for generation of various value-added products, such as enzymes [ 38 ], MOS [ 39 ] and fermentable sugars [ 5 , 40 ].…”

Section: Mannan-containing Waste Biomass Derived From Agro-processingmentioning

confidence: 99%

Enzymatic Conversion of Mannan-Rich Plant Waste Biomass into Prebiotic Mannooligosaccharides

Hlalukana

Magengelele

Malgas

et al. 2021

Foods

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A growing demand in novel food products for well-being and preventative medicine has attracted global attention on nutraceutical prebiotics. Various plant agro-processes produce large amounts of residual biomass considered “wastes”, which can potentially be used to produce nutraceutical prebiotics, such as manno-oligosaccharides (MOS). MOS can be produced from the degradation of mannan. Mannan has a main backbone consisting of β-1,4-linked mannose residues (which may be interspersed by glucose residues) with galactose substituents. Endo-β-1,4-mannanases cleave the mannan backbone at cleavage sites determined by the substitution pattern and thus give rise to different MOS products. These MOS products serve as prebiotics to stimulate various types of intestinal bacteria and cause them to produce fermentation products in different parts of the gastrointestinal tract which benefit the host. This article reviews recent advances in understanding the exploitation of plant residual biomass via the enzymatic production and characterization of MOS, and the influence of MOS on beneficial gut microbiota and their biological effects (i.e., immune modulation and lipidemic effects) as observed on human and animal health.

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Thermal stability of spent coffee ground polysaccharides: Galactomannans and arabinogalactans

Cited by 32 publications

References 22 publications

Formation of type 4 resistant starch and maltodextrins from amylose and amylopectin upon dry heating: A model study

Formation of type 4 resistant starch and maltodextrins from amylose and amylopectin upon dry heating: A model study

Extraction of polysaccharides by autohydrolysis of spent coffee grounds and evaluation of their antioxidant activity

Enzymatic Conversion of Mannan-Rich Plant Waste Biomass into Prebiotic Mannooligosaccharides

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