Mechanistic Investigation in Ultrasound-Assisted (Alkaline) Delignification of Parthenium hysterophorus Biomass

2014 ◽  
Vol 53 (37) ◽  
pp. 14241-14252 ◽  
Author(s):  
Shuchi Singh ◽  
S. T. P. Bharadwaja ◽  
Pawan Kumar Yadav ◽  
Vijayanand S. Moholkar ◽  
Arun Goyal
Keyword(s):  
Parthenium Hysterophorus ◽  
Mechanistic Investigation ◽  
Ultrasound Assisted ◽  
Alkaline Delignification

Ultrasound assisted biodesulfurization of liquid fuel using free and immobilized cells of Rhodococcus rhodochrous MTCC 3552: A mechanistic investigation

2015 ◽  
Vol 187 ◽  
pp. 369-378 ◽  
Author(s):  
Jaykumar B. Bhasarkar ◽  
Pritam Kumar Dikshit ◽  
Vijayanand S. Moholkar
Keyword(s):  
Liquid Fuel ◽  
Immobilized Cells ◽  
Rhodococcus Rhodochrous ◽  
Mechanistic Investigation ◽  
Ultrasound Assisted

Mechanistic investigation in ultrasound‐assisted interesterification using non‐edible oil blends and heterogeneous catalyst

2021 ◽  
Author(s):  
Ritesh S. Malani ◽  
Sushobhan Pradhan ◽  
Arun Goyal ◽  
Vijayanand S. Moholkar
Keyword(s):  
Heterogeneous Catalyst ◽  
Edible Oil ◽  
Oil Blends ◽  
Mechanistic Investigation ◽  
Ultrasound Assisted

Ultrasound enhanced ethanol production from Parthenium hysterophorus: A mechanistic investigation

2015 ◽  
Vol 188 ◽  
pp. 287-294 ◽  
Author(s):  
Shuchi Singh ◽  
Shyamali Sarma ◽  
Mayank Agarwal ◽  
Arun Goyal ◽  
Vijayanand S. Moholkar
Keyword(s):  
Ethanol Production ◽  
Parthenium Hysterophorus ◽  
Mechanistic Investigation

Ultrasound enhanced enzymatic hydrolysis of Parthenium hysterophorus: A mechanistic investigation

2015 ◽  
Vol 192 ◽  
pp. 636-645 ◽  
Author(s):  
Shuchi Singh ◽  
Mayank Agarwal ◽  
Aditya Bhatt ◽  
Arun Goyal ◽  
Vijayanand S. Moholkar
Keyword(s):  
Enzymatic Hydrolysis ◽  
Parthenium Hysterophorus ◽  
Mechanistic Investigation ◽  
Hydrolysis Of

scholarly journals Ultrasound-Assisted Production of Xylo-Oligosaccharides From Alkali-Solubilized Corncob Bran Using Penicillium janthinellum XAF01 Acidic Xylanase

2021 ◽  
Vol 9 ◽  
Author(s):  
Mingchun Zhou ◽  
Guangsen Fan ◽  
Hanshuo Xia ◽  
Xiaohan Zhang ◽  
Chao Teng ◽  
...  
Keyword(s):  
Enzymatic Reaction ◽  
Cd Spectroscopy ◽  
Random Coil ◽  
Operational Parameters ◽  
Ultrasonic Pretreatment ◽  
Penicillium Janthinellum ◽  
Particle Size Analyzer ◽  
Mechanistic Investigation ◽  
Ultrasound Assisted ◽  
Ultrasonic Parameters

A novel treatment involving enzymatic hydrolysis using an acidic xylanase coupled with ultrasound was performed to improve the xylo-oligosaccharides (XOS) yield from corncob bran. The acidic xylanase (XynB) was purified to a most suitable pH, temperature, and operational parameters for ultrasound-assisted hydrolysis were determined. A preliminary mechanistic investigation was performed through circular dichroism (CD) spectroscopy, scanning electron microscope (SEM) and a laser particle size analyzer, and the effects of ultrasound on enzyme (XynB) and substrate (corncob bran) were assessed. The results show that the maximum XOS yield was 20.71% when the reaction pH and temperature were 4.3 and 50°C, the ultrasonic parameters were 50 kHz and 0.40 W/cm2, which was 2.55 fold higher than that obtained using a non-ultrasound-assisted enzymatic preparation. Mechanism studies indicated that ultrasonic pretreatment could reduce the β-fold content and increase the random coil content. Changes in structure and size of substrate were observed. The specific surface area of the XAC molecules is easy to carry out enzymatic reaction, which is beneficial to the production of XOS.

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.

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