Heat-induced degradation of inulin

Böhm, Alexander; Kaiser, Ivan I.; Trebstein, A.; Henle, Thomas

doi:10.1007/s00217-004-1098-8

Cited by 107 publications

(56 citation statements)

References 18 publications

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“…One challenge of using plant products is that the content of the active components are typically dependent on plant genotype, time of harvest, processing and storage (Ernst et al, 1995;Böhm et al, 2005;Raccuia and Melilli, 2010), all of which may help to explain, why parasitological results can vary between studies. Additionally, even very high levels of fermentable carbohydrates do not completely eliminate helminth infections (Mejer et al, unpublished) and can only fully compete with drugs, if anthelmintic resistance becomes a problem.…”

Section: Effects Of Dietmentioning

confidence: 99%

Helminth parasites in pigs: New challenges in pig production and current research highlights

Roepstorff

Mejer

Nejsum

et al. 2011

Veterinary Parasitology

147

101

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a b s t r a c tHelminths in pigs have generally received little attention from veterinary parasitologists, despite Ascaris suum, Trichuris suis, and Oesophagostomum sp. being common worldwide. The present paper presents challenges and current research highlights connected with these parasites.In Danish swine herds, new indoor production systems may favour helminth transmission and growing knowledge on pasture survival and infectivity of A. suum and T. suis eggs indicates that they may constitute a serious threat to outdoor pig production. Furthermore, it is now evident that A. suum is zoonotic and the same may be true for T. suis. With these 'new' challenges and the economic impact of the infections, further research is warranted. Better understanding of host-parasite relationships and A. suum and T. suis egg ecology may also improve the understanding and control of human A. lumbricoides and T. trichiura infections.The population dynamics of the three parasites are well documented and may be used to study phenomena, such as predisposition and worm aggregation. Furthermore, better methods to recover larvae have provided tools for quantifying parasite transmission. Thus, an on-going study using helminth naïve tracer pigs has surprisingly demonstrated that soil infectivity with A. suum and T. suis increases during the first 2-3 years after pasture contamination.Though all three helminth species stimulate the Th2 arm of the immune system, Oesophagostomum seems weakly immunogenic, perhaps via specific modulation of the host immune system. A. suum and T. suis potently modulate the host immune response, up-regulating Th2 and down-regulating Th1. As a consequence, A. suum may compromise the efficacy of certain bacterial vaccines, whereas T. suis, which establish only short-term in humans, is a favourite candidate for down-regulating autoimmune Th1-related diseases in man.Some basic research findings have offered new possibilities for future sustainable control measures. For example, the heredity of host resistance to A. suum and T. suis is so high that breeding for resistant pigs may be a possibility. Experimental studies have demonstrated that fermentable dietary carbohydrates have an antagonistic effect on Oesophagostomum and to a lesser extent on T. suis and A. suum, whereas egg-destroying microfungi may be used to inactivate the hard-shelled A. suum and T. suis eggs in the environment.Helminth control in Denmark has previously relied solely on anthelmintic treatment in herds with low helminth transmission. When indoor transmission rates * Corresponding author. Tel.: +45 3533 2746. increase, or in outdoor herds with high pasture contamination levels, medication may advantageously be combined with sustainable control measures, such as selected pig genomes, bioactive forages, and egg-destroying microfungi.

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Section: Effects Of Dietmentioning

confidence: 99%

Helminth parasites in pigs: New challenges in pig production and current research highlights

Roepstorff

Mejer

Nejsum

et al. 2011

Veterinary Parasitology

147

101

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“…An interesting biopolymer is inulin, an oligosaccharide consisting of mainly fructose units, in some cases capped with a glucose unit [6,15,26]. Inulin can be extracted from plants, examples are jerusalem artichoke [27][28][29][30][31], chicory [28][29][30][31] and dahlia tubers [28][29][30][31]. Of particular interest are the Jerusalem artichoke and chicory, which are reported to have a high inulin content of up to 20% on fresh weight [32].…”

Section: Introductionmentioning

confidence: 99%

Experimental and modelling studies on the uncatalysed thermal conversion of inulin to 5-hydroxymethylfurfural and levulinic acid

Fachri

Abdilla

Rasrendra

et al. 2015

Sustain Chem Process

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Background: 5-Hydroxymethylfurfural (HMF), an important biobased platform chemical, is accessible by the acid catalysed conversion of biopolymers containing hexoses (cellulose, starch, inulin) and monomeric sugars derived thereof. We here report an experimental study on the uncatalysed, thermal conversion of inulin to HMF in aqueous solutions in a batch set-up. Results:The reactions were conducted in a temperature range of 153-187°C, an inulin loading between 0.03 and 0.12 g/mL and batch times between 18 and 74 min using a central composite experimental design. The highest experimental HMF yield in the process window was 35 wt% (45 mol%), which is 45% of the theoretical maximum (78 wt%). The HMF yields were modeled using a statistical approach and good agreement between experiment data and model was obtained. The possible autocatalytic role of formic acid (FA) and levulinic acid, two main byproducts, was probed by performing reactions in the presence of these acids and it was shown that particularly FA acts as a catalyst. Conclusions:Inulin is an interesting feed for the synthesis of HMF in water. A catalyst is not required, though autocatalytic effects of FA play a major role and also affect reaction rates and product yields. Graphical abstract:Chicory 5-hydroxymethylfurfural No catalystInulin

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“…Inulin consists of chains of fructose units coupled by β (2,1)-bonds most often (though not always) terminated by a single glucose moiety. The degree of polymerization (dp) of inulin ranges from 2 to 60 and above and depends mainly on the type of plant from which it is isolated (3,8). Due to their β (2,1)-bonds, inulin is resistant to enzymatic hydrolysis in the upper gastrointestinal tract of humans and monogastric animals.…”

Section: Introductionmentioning

confidence: 99%

Effects of inulin on rumen metabolism in vitro

Öztürk¹

2008

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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Summary:The objective of this study was to investigate the effects of inulin [as topinambur (Helianthus tuberosus L.) powder] on in vitro rumen fermentation of diets containing hay and pelleted concentrate for sheep (approximately 60:40%) in artificial rumen (the RUSITEC system). The RUSITEC system consisted of six fermentation vessels. Topinambur powder was added at levels of 0.2, 0.4, 0.6, 0.8 and 1.0 g/day into the five fermentation vessels while the last one served as a control (without having any topinambur powder). The results showed that the addition of topinambur powder up to 1.0 g/day reduced NH 3 -N concentration significantly (p<0.05). However, the other basal parameters of rumen fermentation (pH, short-chain fatty acid production and organic matter digestibility) examined in this study were not significantly affected by the addition of topinambur powder. These results indicated that inulin has the potential to improve ruminal nitrogen utilization.Key words: Helianthus tuberosus L., inulin, prebiotic, rumen, topinambur powder. Inulinin rumen metabolizması üzerine in vitro etkileri

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Heat-induced degradation of inulin

Cited by 107 publications

References 18 publications

Helminth parasites in pigs: New challenges in pig production and current research highlights

Helminth parasites in pigs: New challenges in pig production and current research highlights

Experimental and modelling studies on the uncatalysed thermal conversion of inulin to 5-hydroxymethylfurfural and levulinic acid

Effects of inulin on rumen metabolism in vitro

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