scholarly journals Applying ultrasound-assisted processing to obtain cellulose fibres from rice straw to be used as reinforcing agents

2022 ◽  
pp. 102932
Author(s):  
Pedro A.V. Freitas ◽  
Chelo González-Martínez ◽  
Amparo Chiralt
Keyword(s):  
Rice Straw ◽  
Cellulose Fibres ◽  
Ultrasound Assisted

scholarly journals Characteristics of Natural Cellulose Fibres Extracted from Sri Lankan Rice Straw Varieties

2020 ◽  
Vol 31 (3) ◽  
pp. 72
Author(s):  
A. Ratnakumar ◽  
A. M. P. B. Samarasekara ◽  
D. A. S. Amarasinghe ◽  
L. Karunanayake
Keyword(s):  
Rice Straw ◽  
Sri Lankan ◽  
Cellulose Fibres ◽  
Natural Cellulose

scholarly journals Lignin and Cellulose Extraction from Vietnam’s Rice Straw Using Ultrasound-Assisted Alkaline Treatment Method

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Ngo Dinh Vu ◽  
Hang Thi Tran ◽  
Nhi Dinh Bui ◽  
Cuong Duc Vu ◽  
Hung Viet Nguyen
Keyword(s):  
Rice Straw ◽  
Ultrasonic Irradiation ◽  
Extraction Method ◽  
Treatment Method ◽  
Alkaline Treatment ◽  
Lignin Extraction ◽  
Ultrasonic Assisted ◽  
Ft Ir ◽  
Ultrasound Assisted ◽  
Modern Analytical

The process of cellulose and lignin extraction from Vietnam’s rice straw without paraffin pretreatment was proposed to improve economic efficiency and reduce environmental pollution. Treatment of the rice straw with ultrasonic irradiation for 30 min increased yields of lignin separation from 72.8% to 84.7%. In addition, the extraction time was reduced from 2.5 h to 1.5 h when combined with ultrasonic irradiation for the same extraction yields. Results from modern analytical methods of FT-IR, SEM, EDX, TG-DTA, and GC-MS indicated that lignin obtained by ultrasound-assisted alkaline treatment method had a high purity and showed a higher molecular weight than that of lignin extracted from rice straw without ultrasonic irradiation. The lignin and cellulose which were extracted from rice straw showed higher thermal stability with 5% degradation at a temperature of over 230°C. The ultrasonic-assisted alkaline extraction method was recommended for lignin and cellulose extraction from Vietnam’s rice straw.

Pretreatment of rice straw by ultrasound-assisted Fenton process

2017 ◽  
Vol 227 ◽  
pp. 408-411 ◽  
Author(s):  
Zi-Yao Xiong ◽  
Yuan-Hang Qin ◽  
Jia-Yu Ma ◽  
Li Yang ◽  
Zai-Kun Wu ◽  
...  
Keyword(s):  
Rice Straw ◽  
Fenton Process ◽  
Ultrasound Assisted

Effect of thermal treatment on Egyptian rice straw hardboard

1977 ◽  
Vol 27 (1) ◽  
pp. 93-98
Author(s):  
Naim A. Fadl ◽  
Magdi Z. Sefain ◽  
Mohomed Rakha
Keyword(s):  
Thermal Treatment ◽  
Rice Straw

Innovative Extraction Techniques for the Optimum Extraction of Phenolic Compounds from Peanut Meal and Evaluation of Their Biological Activities

2019 ◽  
Vol 4 (2) ◽  
Keyword(s):  
Phenolic Compounds ◽  
Carcinoma Cell ◽  
Biological Activities ◽  
Peanut Meal ◽  
Ultrasound Assisted Extraction ◽  
Carcinoma Cell Lines ◽  
Assisted Extraction ◽  
Phenolic Extract ◽  
Ultrasound Assisted ◽  
Water Ratio

There is a worldwide demand for phenolic compounds (PC) because they exhibit several biological activities. This work aimed at extracting phenolic compounds from peanut meal. The methods of extraction were mainly: conventional solvent extraction (traditional methods) and ultrasound assisted extraction (recent methods) and comparing their results. Peanut meal (PM) was prepared by defatting with n-hexane, and then extracted by the two previous methods. First, the conventional solvents used were 80% methanol, ethanol, acetone, isopropanol, and distilled water. Then studied Different parameters such as meal: water ratio, also the effect of temperature and the pH on the extraction process. Second, ultrasonic assisted extractions (USAE), the parameters investigated were temperature, time and speed of sonication. Finally, all the extracts were analyzed by HPLC for their phenolic contents. Results indicated that the highest extracted PC achieved by solvents was in distilled water where 1:100, Meal: Water ratio which extracted 40 mg PC / g PM at 30& 35°C. Highest extracted PC was achieved by alkaline medium at pH 12 more than acidic and neutral medium. While (USAE) at speed 8 ultrasonication and temperature 30ᵒC, extracted 49.2mg PC /g PM. Sothe ultrasound assisted extraction exhibited great influence on the extraction of phenolic compounds from peanut meal. The ultrasonic peanut extract was examined for its antioxidant, antimicrobial and anticarcinogenic activities. The antioxidant activity of PM phenolic extract prepared by ultrasonic technique, was measured by, β-carotene, and DPPH methods, and reducing antioxidant power. Results revealed values: 84.57, 57.72 and 5960 respectively. The PM extract showed different levels of antimicrobial activity against the pathogenic bacteria used. As for the anticarcinogenic effect PM phenolic extract most effective on inhibiting colon carcinoma and lung carcinoma cell lines with IC50 = 20.7 and 20.8 µ/ml., respectively. This was followed by intestinal carcinoma and liver carcinoma cell lines with IC50= 39.6 and 40.2µ/ml.

Dairy Farmers Empowerment in Subak Anggabaya Penatih Timur Denpasar Bali Indonesia

2018 ◽  
Vol 9 (05) ◽  
pp. 20218-20223
Author(s):  
I Ketut Arnawa ◽  
I Wayan Runa ◽  
I Made Sukerta ◽  
Putu Sri Astuti ◽  
Dan Luh Kadek Budi Martini
Keyword(s):  
Rice Straw ◽  
Azadirachta Indica ◽  
Nutritional Value ◽  
Organic Fertilizer ◽  
Process Technology ◽  
Dairy Farmers ◽  
Training Activity ◽  
Good Nutrition ◽  
And Training ◽  
Spraying Method

The main purpose for the application of science and technology for livestock group of cow, is to form a group of skilled and professional livestock, as vaccinators, can take advantage of Azadirachta indica leaves a plant insecticide, apply a good cage sanitation, can produce organic fertilizer from feces of cow, can treat hay as feed to good nutritional value. The method used is education and training. Activity results obtained, that 10 percent of members of the group have managed to become vaccinators cadres, able to implement good sanitation stables, feces of cow (Stomoxys calsitrans) can process technology with EM4 into organic fertilizer and can process the rice straw with urea spraying method, to produce feed hay to the value of good nutrition for growing cattle.

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