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Pullulan kann als Teilersatz für Stärke in Nudeln oder Backwaren verwendet werden

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Pullulan kann als Teilersatz für Stärke in Nudeln oder Backwaren verwendet werden

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pullulan is too expensive for many of these potential uses, including those in which it serves as biodegradable replacement for petroleum-derived polymers.

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The growing need for environmentally friendly products in food industry and other fields , has opened up a new commercial market for organic products, among which Levan has successfully made its way.

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The regular occurrence of a-(l-e,6) linkages in pullulan interrupts what would otherwise be a linear amylose chain. This unique linkage pattern is believed to be responsible for the structural flexibility and solubility of pullulan, resulting in distinct film- and fiber-forming characteristics not exhibited by other polysaccharides. In fact, pullulan films and fibers resemble certain synthetic polymers derived from petroleum. Although more expen- sive than these plastics, pullulan products are edible and biodegradable, and underivatized pullulan is highly water-soluble.

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- potential applications in diverse fields like: medical, chemical, pharmaceutical, cosmetics and food industries e.g. biofloculating agent, colour and
flavour enhancer in the manufacturing of tablets
and capsules
- Levan has anti-tumour, antioxidant and
anti-inflammatory effects

- In food industry, levans can be used as
industrial gums (e.g. substitute for gum Arabic)
- sweeteners
- fat substitues
- fillers (bulking agents)
- emulsifiers and texture forming compounds
- encapsulating agents and carriers for flavours (aromatic enhancers)
- food coating materials (e.g. bio-based plastics for packaging applications)
- stabilizers or thickeners

in cosmetic industry levans show excellent cell proliferation, skin-irritation-alleviating and skin moisturizing effects.

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plasma substitute,  radioprotector, coating material in drug delivery systems,  tablet binder,  or drug carrier of nano-scale size range for peptides and proteins etc.

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Its main plant sources are: Agropyron cristatum,
Dactylis glomerata, Poa secunda (levan is
usually found in their stems and leaf sheats),
Triticum aestivum, Cocksfoot and Pachysandra
terminalis
Levan is also produced as an exopolysaccharide,
usually from sucrose-based substrates by a
variety of microorganisms

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naturally occurring homopolymer of fructose,
which can be found in plants and many
microbial strains

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Unlike bacterial dextrans, which are synthesized extracellularly by secreted glucansucras- es, pullulan is synthesized intracellularly and secreted by A. pullulans.

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Levan is made of repeating fructose sub-units which
form a main chain with β-(2→6)
fructofuranosidic bonds and occasionally with
β-(2→1) branching.

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Stämme des Pilzes Aureobasidium pullulans

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lineares Homopolysaccharid der Glucose, das häufig als a-(1~6)-verknüpft

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curdlan is also used to
improve the elasticity and strength of freezable noodles.

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- Agrobacterium-Stämme (bieten hohe Fermentationsausbeute)

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Some aminated and sulfated curdlans have been
synthesized and identified as biological response (antitumor,
wound repair, or anti-HIV)10,11 modifiers to enhance or adapt
immune responses.

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Viele wesentliche Faktoren beeinflussen die Curdlanproduktion, darunter Kohlenstoff-, Stickstoff-, Sauerstoff- und Phosphatquellen sowie der pH-Wert.

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Curdlan’s remarkable rheological and
thermal behaviors have led to its application as a thickening
agent or fat-mimic substitute in the food industry.

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vegetarischen Lebensmittelformulierungen, wie z.B. als Meeresfrüchte-Delikatessen (Krabbenfleisch, Fischtofu und Garnelenbällchen) und vegetarische Fleischanaloga

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Mitglieder der (1→ 3)-β-Glucan-Polysaccharidfamilie kommen in verschiedenen lebenden Organismen vor, darunter Protozoen, Algen, Hefen, Pilze und höhere Pflanzen.

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Zur Kommunikation innerhalb der Gruppe stehen Ihnen Breakout Sessions im ZOOM-Link der Veranstaltung zur Verfügung

https://tu-berlin.zoom.us/j/69723318730?pwd=TXpHU2ExQU01aWpTMU9ZcXJMeDluQT09

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Ordnen sie mit Hilfe der gegebenen Literatur den Strukturformeln ihren Namen und die wichtigesten Informationen zum jeweiligen Polysaccharid zu. Dabei können sie sich am Beispiel Dextran orientieren.

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Biotechnological production and applications of pullulan

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Biotechnological production and applications of pullulan

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Hier reicht es wenn sie sich auf folgende Abschnitte konzentrieren:
- Introduction
- Properties and applications

https://pubag.nal.usda.gov/download/25899/pdf

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Hier reicht es wenn sie sich auf folgende Abschnitte konzentrieren:
- Introduction
- Levan
- Structure and properties
- Applications

http://www.biotechnologyjournal.usamv.ro/pdf/2016/Art51.pdf

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- Not hydrolyzed by human digestive
enzymes → bifidogenic effect
- Microbial levans generally have molecular weights up to several millions Da, where the Levans from the plants are much smaller than those produced by microorganisms, usually with molecular weights between 2000 and 33000 Daltons.

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Properties, Chemistry, and Applications of the Bioactive Polysaccharide Curdlan

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Properties, Chemistry, and Applications of the Bioactive Polysaccharide Curdlan

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Hier reicht es wenn sie sich auf folgende Abschnitte konzentrieren:
1. Introduction
2.6.1 Food Industry

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- unlöslich im Wasser, aber löslich in alkalischen Medien
- beim Erhitzen einer wässrigen Curdlan-Suspension können sich 2 Arten von Gelen in Abhängigkeit von Erhitzungstermperatur bilden
-Curdlan also has enhanced
organic solubility versus many other natural polysaccharides

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A comparative study of molecular structure, solution properties and food application for three branched polysaccharides: Amylopectin, glycogen, and dextran

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A comparative study of molecular structure, solution properties and food application for three branched polysaccharides: Amylopectin, glycogen, and dextran

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Dextran kann ein Molekulargewicht von über 10^8 Da erreichen

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Dextran kann ein Molekulargewicht von über 10^8 Da erreichen

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(Hier können sie Informationen zufügen auf die sie während ihrer Recherche stoßen und für wissenswert halten)

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In vito Produktion in fermentierten Lebensmitteln

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In vito Produktion in fermentierten Lebensmitteln