A novel method of manufacturing rigid and robust natural fiber preforms is presented here. This method is based on a papermaking process, whereby loose and short sisal fibers are dispersed into a water suspension containing bacterial cellulose. The fiber and nanocellulose suspension is then filtered (using vacuum or gravity) and the wet filter cake pressed to squeeze out any excess water, follo...

Bacterial cellulose- Curcuma Longa Linn from acetobacter xylinum has been produced. The aim of research: To isolate Cellulose-Curcuma Acetobacter and to improve activity catalitic bacterial cellulose. Morphology properties was carried out on sample cellulose extract. This characteristic test by Scanning Electron Microscope (SEM).

During the attachment of Agrobacterium tumefaciens to carrot tissue culture cells, the bacteria synthesize cellulose fibrils. We examined the role of these cellulose fibrils in the attachment process by determining the properties of bacterial mutants unable to synthesize cellulose. Such cellulose-minus bacteria attached to the carrot cell surface, but, in contrast to the parent strain, with whi...

Reaction conditions for the reducing-end-specific derivatization of cellulose substrates with the fluorogenic compound, anthranilic acid, have been established. Hydrolysis of fluorescence-labelled celluloses by cellobiohydrolase Cel7A from Trichoderma reesei was consistent with the active-site titration kinetics (burst kinetics), which allowed the quantification of the processivity of the enzym...

Bacterial cellulose is a strong, highly pure form of cellulose that is used in a range of applications in industry, consumer goods and medicine. Gluconacetobacter hansenii ATCC 53582 is one of the highest reported bacterial cellulose producing strains and has been used as a model organism in numerous studies of bacterial cellulose production and studies aiming to increased cellulose productivit...

Raman and Fourier Transform Infrared (FT-IR) spectroscopy was used for assessment of structural differences of celluloses of various origins. Investigated celluloses were: bacterial celluloses cultured in presence of pectin and/or xyloglucan, as well as commercial celluloses and cellulose extracted from apple parenchyma. FT-IR spectra were used to estimate of the I(β) content, whereas Raman spe...

Bacterial cellulose was produced by Acetobacter xylinum (strain TISTR 975). Bacterial cellulose is an interesting material for using as a wound dressing since it provides moist environment to a wound resulting in a better wound healing. However, bacterial cellulose itself has no antimicrobial activity to prevent wound infection. To achieve antimicrobial activity, silver nanoparticles were impre...

The effect of either high-cellulose (15%) or regular-cellulose (5%) diets on fecal bacterial glycosidases was assessed in two groups of ten Wistar rats, each given an injection of 1,2-dimethylhydrazone, and in two groups of six control rats. During a 4-month period, fecal activities of bacterial beta-galactosidase and beta-acetylglucosaminidase were reduced markedly in control rats maintained o...

The yield and properties of cellulose produced from bacterial fermentation of black tea broth (known as Kombucha) were investigated in this study. The tea broth was fermented naturally over a period of up to 8 days in the presence of sucrose. Tea broth with a sucrose concentration of 90 g/l produced highest yield of bacterial cellulose (66.9%). The thickness and yield of bacterial cellulose inc...

The effect of either high-cellulose (15%) or regular-cellulose (5%) diets on fecal bacterial glycosidases was assessed in two groups of ten Wistar rats, each given an injection of 1,2-dimethylhydrazone, and in two groups of six control rats. During a 4-month period, fecal activities of bacterial /3-galactosidase and /3-acetylglucosaminidase were reduced markedly in control rats maintained on th...