Isolation and characterization of stable nanofiber from turmeric spent using chemical treatment by acid hydrolysis and its potential as antimicrobial and antioxidant activities

2019 ◽  
Vol 56 (4) ◽  
pp. 327-340 ◽  
Author(s):  
Sreeraj Gopi ◽  
Augustine Amalraj ◽  
Shintu Jude ◽  
K.T. Benson ◽  
Preetha Balakrishnan ◽  
...  
Keyword(s):  
Acid Hydrolysis ◽  
Chemical Treatment ◽  
Antioxidant Activities ◽  
Isolation And Characterization

scholarly journals Isolation and characterization of halophilic bacteria producing exopolymers with emulsifying and antioxidant activities

2018 ◽  
Vol 16 ◽  
pp. 631-637 ◽  
Author(s):  
Nadia Boujida ◽  
Montserrat Palau ◽  
Saoulajan Charfi ◽  
Naima El Moussaoui ◽  
Angeles Manresa ◽  
...  
Keyword(s):  
Antioxidant Activities ◽  
Halophilic Bacteria ◽  
Isolation And Characterization

Production of Cellulose Nanocrystals from Australian Wood Sources

2020 ◽  
Vol 20 (9) ◽  
pp. 5642-5647
Author(s):  
Lachlan Thompson ◽  
Mostafa Nikzad ◽  
Igor Sbarski ◽  
Jalal Azadmanjiri ◽  
Jiawen Ren ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Acid Hydrolysis ◽  
Cellulose Nanocrystals ◽  
Chemical Treatment ◽  
Eucalyptus Globulus ◽  
Acacia Mangium ◽  
Kraft Pulps ◽  
High Yields

Two Australian native wooden sources (Acacia Mangium and Eucalyptus Globulus) derived pulps were explored as raw feed stocks to prepare the valuable nanomaterial of cellulose nanocrystals (CNC). After bleaching and acid hydrolysis, cellulose nanocrystals were successfully produced with high yields of approximately 60% for both kraft pulps. According to the characterization of SEM and AFM, the as prepared CNC had a rod like structure with the length and diameter in the range of 200~1000 nm and 10~100 nm, respectively based on the initial wooden source. XRD confirmed the crystalline structure of the resulting CNC. Further characterisation by TGA showed that the chemical treatment of the wood pulp had impact upon the thermal stability, evidenced by a lower onset temperature of the thermal decomposition of CNC.

scholarly journals Isolation and Characterization of Pectin from Pumpkin (Cucurbita maxima) Waste and Its Food Application

2019 ◽  
pp. 1-9
Author(s):  
Jayani Sandarani Maddakandage Dona
Keyword(s):  
Acid Hydrolysis ◽  
Activity Index ◽  
Dry Weight ◽  
Reaction Conditions ◽  
Isolation And Characterization ◽  
Significant Difference ◽  
Food Applications ◽  
Methoxy Content ◽  
Water Holding

Pectin was extracted using the method of acid hydrolysis followed by ethanol precipitation at various reaction conditions. Effect of blanching prior to acid hydrolysis, acid types (hydrochloric and citric) and extraction time and temperature combinations were tested to maximize the yield of pectin and they were characterized by assessing physiochemical and functional properties. The feasibility of utilizing extracted pectin in food applications was evaluated. The yield of pectin ranged from 7.30 ± 0.07- 11.04 ±0.01% on a dry weight basis. The results suggested that the highest pectin content is in the fresh pumpkin peel extracted using 0.1 N hydrochloric acid at 80±5℃, 1.25 pH for 1 hour. Water holding capacity, oil holding capacity and emulsifying activity index of pumpkin pectin were 2.5 g/g of pectin (SD 0.46), 1.76 g/g of pectin (SD 0.10) and 0.29 (SD 0.01) respectively. In addition, the degree of esterification, equivalent weight, methoxy content and galacturonic acid content of extracted pectin were 67.64% (SD 0.89%), 978.35 (SD 69.88), 6.55% (SD 0.37%) and 66.46% (SD 1.19%) respectively. Sensory analysis revealed that there is no significant difference in spreadability, surface texture and chewiness of two types of jam prepared using pumpkin and commercial pectin. In conclusion, pumpkin pectin can be categorized as high methoxy pectin.

Isolation and characterization of cellulose nanofibers from bamboo using microwave liquefaction combined with chemical treatment and ultrasonication

2016 ◽  
Vol 151 ◽  
pp. 725-734 ◽  
Author(s):  
Jiulong Xie ◽  
Chung-Yun Hse ◽  
Cornelis F. De Hoop ◽  
Tingxing Hu ◽  
Jinqiu Qi ◽  
...  
Keyword(s):  
Chemical Treatment ◽  
Cellulose Nanofibers ◽  
Isolation And Characterization
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