Isolation and characterization of nanocellulose crystals via acid hydrolysis from agricultural waste-tea stalk

2020 ◽  
Vol 163 ◽  
pp. 927-933
Author(s):  
Yunfeng Guo ◽  
Yangyang Zhang ◽  
Dingyuan Zheng ◽  
Mengyang Li ◽  
Jinquan Yue
Keyword(s):  
Acid Hydrolysis ◽  
Agricultural Waste ◽  
Isolation And Characterization ◽  
Waste Tea

scholarly journals Isolation, Characterization of Fiber and Its Reinforcement in Film Formation

2019 ◽  
Vol 9 (1S4) ◽  
pp. 766-768
Keyword(s):  
Acid Hydrolysis ◽  
Raw Materials ◽  
Film Formation ◽  
Alkali Treatment ◽  
Agricultural Waste ◽  
Tween 80 ◽  
Bleaching Process ◽  
Cassava Bagasse ◽  
Fiber Characterization

The aim of this project is to segregate the fiber from agricultural waste in three distinct stages such as alkali treatment, bleaching process, acid hydrolysis. Agricultural wastes such as cassava bagasse, sorghum stalk, corn stalk were selected. Initially the raw materials were subjected to chemical processes like alkali treatment and bleaching process to remove lignin and hemi cellulose. The chemically purified cellulose was then subjected to acid hydrolysis for isolation of fiber. Characterization of FTIR result shows that hemicellulose and lignin was partially eliminated. TGA was carried to know the thermal properties of the sample. The film was formed by casting method using isolated fiber, maize starch, agar, Tween 80. The fibers were incorporated into the film and their properties such as tensile strength, moisture content and solubility were studied

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 an Angular- Type Dihydropyranocoumaringlycoside from the Fruits of Ammi visnaga (L.) LAM. (Apiaceae)

1995 ◽  
Vol 50 (9-10) ◽  
pp. 729-731 ◽  
Author(s):  
H. Sonnenberg ◽  
M. Kaloga ◽  
N. Eisenbach ◽  
K.-K. Frömming
Keyword(s):  
Acid Hydrolysis ◽  
Spectral Data ◽  
Ammi Visnaga ◽  
Isolation And Characterization

Abstract An angular-type dihydropyranocoumaringlucoside, namely, cis-Khellactone-3′-β-D-glucopyranoside (1) was isolated from the fruits of Ammi visnaga (L.) LAM. (Apiaceae). The structure was established on the basis of acid hydrolysis and spectral data

scholarly journals Isolation and Characterization of Nanocellulose with a Novel Shape from Walnut (Juglans Regia L.) Shell Agricultural Waste

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1130 ◽  
Author(s):  
Dingyuan Zheng ◽  
Yangyang Zhang ◽  
Yunfeng Guo ◽  
Jinquan Yue
Keyword(s):  
Sulfuric Acid ◽  
Acid Hydrolysis ◽  
Agricultural Waste ◽  
Juglans Regia ◽  
Alkaline Treatment ◽  
Raw Material ◽  
Walnut Shell ◽  
Tempo Oxidation ◽  
Thermal Stabilities ◽  
Isolation And Characterization

Herein, walnut shell (WS) was utilized as the raw material for the production of purified cellulose. The production technique involves multiple treatments, including alkaline treatment and bleaching. Furthermore, two nanocellulose materials were derived from WS by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidation and sulfuric acid hydrolysis, demonstrating the broad applicability and value of walnuts. The micromorphologies, crystalline structures, chemical functional groups, and thermal stabilities of the nanocellulose obtained via TEMPO oxidation and sulfuric acid hydrolysis (TNC and SNC, respectively) were comprehensively characterized. The TNC exhibited an irregular block structure, whereas the SNC was rectangular in shape, with a length of 55–82 nm and a width of 49–81 nm. These observations are expected to provide insight into the potential of utilizing WSs as the raw material for preparing nanocellulose, which could address the problems of the low-valued utilization of walnuts and pollution because of unused WSs.

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