BACKGROUND Ever increasing demand for fossil fuels is a major factor for rapid depletion of these non-renewable energy resources, which has enhanced the interest of finding out alternative sources of energy. In recent years jatropha seed oil has been used extensively for production of bio-diesel and has shown significant potential to replace petroleum fuels at least partially. De-oiled jatropha...

The article presents an overview of the latest advances in investigations and application of the pullulan from microbes (Auriobasidium sps.) and its derivatives in the biomedical and pharmaceutical field and how this polysaccharide can be of use as a promising biomaterial in the coming future. So many papers were published during the last four decades indicated that pullulan the unique biomater...

Self-assembled nanogels made of hydrophobized pullulan were obtained using a versatile, simple, reproducible and low-cost method. In a first reaction pullulan was modified with hydroxyethyl methacrylate or vinyl methacrylate, further modified in the second step with hydrophobic 1-hexadecanethiol, resulting as an amphiphilic material, which self-assembles in water via the hydrophobic interaction...

Ten isolates of Aureobasidium pullulans were screened for the highest production of pullulan and minimal melanin production from Fayoum Governorate, Egypt. The optimum conditions for continuous culture were studied; temperature was 24°C, while pH 5.0, and agitation speed was at 500 rpm, while the aeration rate was 2.5 vvm and the best flow rate was 1 L/ 24 h. The maximum production of pullulan ...

The extracellular enzymatic activity of a mixed culture of anaerobic marine bacteria enriched on pullulan [alpha(1,6)-linked maltotriose units] was directly assessed with a combination of gel permeation chromatography (GPC) and nuclear magnetic resonance spectroscopy (NMR). Hydrolysis products of pullulan were separated by GPC into three fractions with molecular weights of > or = 10,000, approx...

The study involved an examination of the antifungal activity on red peppers of pullulan coating (P) and pullulan coating containing either water-ethanol (P + eEMF) or ethanol extract of meadowsweet flowers (P + eEMF). Pullulan was obtained from a culture of Aureobasidium pullulans B-1 mutant. Both non-inoculated peppers and those artificially inoculated with Rhizopus arrhizus were coated and in...

Forty-two bifidobacterial strains were screened for alpha-amylase and/or pullulanase activity by investigating their capacities to utilize starch, amylopectin, or pullulan. Of the 42 bifidobacterial strains tested, 19 were capable of degrading potato starch. Of these 19 strains, 11 were able to degrade starch and amylopectin, as well as pullulan. These 11 strains, which were shown to produce ex...

Introduction Enzymes hydrolyze pullulan are useful in the production of various oligosaccharides. Isopullulanase (IPU) from Aspergillus niger ATCC9642 was originally reported to be an enzyme which hydrolyzes specific sites of pullulan to produce isopanose (Glc-α-(1→4)-Glc-α(1→6)-Glc). Although IPU does not hydrolyze starch, the enzyme hydrolyzes substrates containing panose (Glc-α(1→6)-Glc-α-(1...

Pullulan (PULL)/silver (Ag) nanoparticle composite nanospheres were prepared out of aqueous solutions using electrospray technique by controlling the concentration of PULL solution. Since pullulan is a water soluble and interesting natural polymer for many of its merits and good properties, it is one of the best materials for preparation of antibacterial material. Scanning electron microscopy (...

Glass transition and glycerol effects on sucrose inversion were investigated in pullulan-sucrose systems at various aw using DSC, sorption isotherms, and determination of sucrose hydrolysis by spectrophotometry. Water and glycerol plasticized the systems. DSC thermograms indicated phase separation in the systems depending on water content. Glycerol increased sucrose hydrolysis at 0.538 aw. INTR...