New Insights on Bacterial Cellulose

Fontana, José D.; Koop, Heidegrid Siebert; Tiboni, Marcela; Grzybowski, Adélia; Pereira, Alice Theresinha Cybis; Kruger, Cassandra D.; Silva, Mônica G.R. da; Wielewski, Leonardo Pellizzari

doi:10.1016/b978-0-12-811372-1.00007-5

Cited by 21 publications

(18 citation statements)

References 110 publications

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“…Pectin was extracted from JAT powder following the method described by Liu et al (21), and the yield of pectin was calculated using the following formula equation: Pectin yield (%) = (m 1 / m 2) ×100 Where (m 1) (g) is the weight of dried pectin, (m 2) (g) is the weight of dried material Inulin hydrolysis for producing FOS: Partial hydrolysis of purified Inulin carried out due to method described by Fontana et al (12).…”

Section: Extraction and Determination Of Pectinmentioning

confidence: 99%

“…Figure 7 demonstrates the same trend in HMF formation at the pH values. The co-generated HMF in small amount can be easily removed by adsorption with activated charcoal (1%-2%) (3,12). RP-HPLC and TLC indicated a wide range of modulation in the qualitative profile of the partial hydrolysis products for inulin.…”

Section: Optimization Of Inulin Hydrolysis To Produce Fos and High Frmentioning

confidence: 99%

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Microwave-Assisted Extraction of Inulin From Jerusalem Artichoke and Partial Acid Hydrolyses

Abood¹

2020

Iraqi J. Agric. Sci.

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The Recent study aimed to identify the optimum conditions for inulin extraction from jerusalem artichoke tuber (JAT) powder using microwave assisted extraction method, and partially hydrolysis of purified inulin for producing fructooligosaccharide (FOS) using citric acid & microwave energy. The extraction conducted at different temperature (90 – 95) C˚ at (700 W/5min, 450w/8 min and 350w/14 min). The extracted inulin was concentrated to (50 – 60) % of original volume using rotary evaporator, and purified by lime method. The purified inulin extract was concentrated to 32 brix and mixed with acetone (3:1 acetone : extract), kept for 24 h at 4 C˚, then centrifuged at 10000g / 15 min., the precipitate dried at 55 ˚C. Acid hydrolysis of purified inulin carried out at different pH values (1.5, 2.5 & 3.0) at (90 ±2) ˚C. Aliquot of inulin hydrolysate were taken after (5, 10, 15, 20, 25 & 30) min. and subjected to qualitative analysis by RP-HPLC and TLC. The obtained results indicated that the microwave assisted extraction at 700 W/ 5 min. / 95 ˚C was superior as compared to the rest. The yield of extracted inulin was about 39.61 % and the extraction efficiency was 94.31 %, while the optimum condition for inulin acid hydrolysis appeared to be at 90 ˚C/ 15 min at pH 2.5 and 450 W. The qualitative analysis using (RP-HPLC & TLC) showed that the DP of inulin units ranged from (2 - 35) and for FOS ranged from (2 – 9) unit.

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Section: Extraction and Determination Of Pectinmentioning

confidence: 99%

Section: Optimization Of Inulin Hydrolysis To Produce Fos and High Frmentioning

confidence: 99%

Microwave-Assisted Extraction of Inulin From Jerusalem Artichoke and Partial Acid Hydrolyses

Abood¹

2020

Iraqi J. Agric. Sci.

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“…8 shows fructose free FOS products (DP, 2-9) in inulin hydrolysates which produced using citric acid at pH, 2.5\ 85˚C for (5, 10 , then free fructose started to increases with hydrolysis time (up to 30 min.). Fontana et al (9) stated that the best conditions for acid hydrolysis of inulin were with citric acid (pH 2.5), temperature 85˚C and reaction time 15 min, which resulted in high amount of FOS with DP ranging from (2 -9) units. Fig.…”

Section: Figure 1 Extractable Inulin Yield From Fresh and Fermented Jamentioning

confidence: 99%

Extraction and Acid Hydrolyses of Fresh Jerusalem Artichoke Inulin for Fructooligosaccharide Production

Abood¹

2019

Iraqi J. Agric. Sci.

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The objective of this study was to produce fructooligosaccharide (FOS) from fresh jerusalem artichoke (JAT) inulin which was extracted by conventional method (hot water extraction) at two different temperature (80˚C & 90˚C\ 90 min). JAT slices were mixed with distilled water at (1 : 5) (w : v) ratio, the obtained extract purified and concentrated to 32˚Brix, then mixed with acetone (1 : 3) (v : v), kept at 4˚C for 24 h., centrifuged at 10000g/ 15 min., and the precipitate dried at 55˚C. Acid hydrolysis of the dried inulin was carried out at three different pH values being (1.5, 2.5 & 3.0) at 85˚C using citric acid (10 %), aliquot of inulin hydrolysate were taken after (5, 10, 15, 20, 25 & 30) min. for qualitative analysis using TLC and RP-HPLC. The results revealed that there were no significant differences in the yield of extracted inulin (33.86, 33.67 %) and extraction efficiency (80.62, 80.17 %) between the extraction at 80˚C and 90˚C\ 90 min. respectively. The optimum condition for acid hydrolysis of the obtained inulin was at pH 2.5 after 15 min at 85˚C. The qualitative analysis for hydrolysate using TLC and RP-HPLC showed that the degree of polymerization (DP) of inulin ranged from (2 - 35) unit and for FOS ranged from (2 – 9) units.

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“…Bacterial cellulose has great current and potential applications in food [3], medicine [4], electronics [5], nanocomposite industries [6], because of properties such as a high degree of purity, polymerization, crystallinity, tensile strength, water absorption, water retaining capacity, biological adaptability, biocompatibility, biodegradability and renewability.…”

Section: Introduction mentioning

confidence: 99%

Influence of Drying Temperature on Tensile and Bursting Strength of Bacterial Cellulose Biofilm

Sederavičiūtė¹,

Domskienė²,

Baltiņa³

2019

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The article presents an experimental study of mechanical properties of cellulose biofilm produced by bacterial fermentation process. Naturally derived biomaterial has great current and potential applications therefore the conditions of material preparation as well as control and prediction of mechanical properties is still a relevant issue. Bacterial cellulose was obtained as a secondary product from Kombucha drink. Presented technique for material preparation and drying is particularly simple and easy to access. The influence of drying temperature (25 °C, 50 °C and 75 °C) on the sample size (thickness and planar dimensions) and mechanical properties (tensile and bursting strength) of cellulose biofilm has been evaluated. It was estimated that during drying biofilm specimens lost up to 92 % of weight and up to 87 % of thickness therefore planar specimen dimensions varied insignificantly. The study showed that the drying temperature is important for optimum strength properties of bacterial cellulose biofilm. The maximum tensile strength (27.91 MPa) was recorded for the samples dried at temperature of 25 °C, when the moisture from the biomaterial is removed gradually and good deformation properties are ensured (respectively tensile extension 18.8 %). Under higher drying temperature biomaterial shows lower values of tensile strength and higher values of bursting strength. The maximum bursting strength (57.2 MPa) was recorded for samples dried at 75 °C when punch displacement changes were insignificant for all tested samples (from 17.8 mm to 21.7 mm). DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20764

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New Insights on Bacterial Cellulose

Cited by 21 publications

References 110 publications

Microwave-Assisted Extraction of Inulin From Jerusalem Artichoke and Partial Acid Hydrolyses

Microwave-Assisted Extraction of Inulin From Jerusalem Artichoke and Partial Acid Hydrolyses

Extraction and Acid Hydrolyses of Fresh Jerusalem Artichoke Inulin for Fructooligosaccharide Production

Influence of Drying Temperature on Tensile and Bursting Strength of Bacterial Cellulose Biofilm

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