Preparation of κ-carra-oligosaccharides with microwave assisted acid hydrolysis method

2015 ◽  
Vol 14 (2) ◽  
pp. 345-349 ◽  
Author(s):  
Guangsheng Li ◽  
Xia Zhao ◽  
Youjing Lv ◽  
Miaomiao Li ◽  
Guangli Yu
Keyword(s):  
Acid Hydrolysis ◽  
Hydrolysis Method ◽  
Microwave Assisted

Optimisation of microwave-assisted acid hydrolysis for the determination of seleno-amino acids bound to proteins in powdered milk, lyophilized milk and infant formula

2019 ◽  
Vol 79 ◽  
pp. 128-133
Author(s):  
Romina Lopez ◽  
Luis Escudero ◽  
Roberto D’Amato ◽  
Daniela Businelli ◽  
Massimo Trabalza-Marinucci ◽  
...  
Keyword(s):  
Amino Acids ◽  
Acid Hydrolysis ◽  
Infant Formula ◽  
Powdered Milk ◽  
Microwave Assisted

scholarly journals Optimization of Xylose Production from Sugarcane Trash by Microwave-Maleic Acid Hydrolysis

REAKTOR ◽  
2020 ◽  
Vol 20 (2) ◽  
pp. 81-88
Author(s):  
Euis Hermiati ◽  
Maulida Oktaviani ◽  
Riksfardini Annisa Ermawar ◽  
Raden Permana Budi Laksana ◽  
Lutfi Nia Kholida ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Acid Hydrolysis ◽  
Response Surface ◽  
Acid Concentration ◽  
Maleic Acid ◽  
Sugar Alcohol ◽  
Quadratic Regression ◽  
Microwave Assisted ◽  
Concentration Time ◽  
Xylose Production

Sugarcane trash contains significant amount of xylan that could be hydrolysed to xylose. The xylose could be further fermented to produce xylitol, a sugar alcohol that has low calories and does not cause carries of teeth. In this study we optimized the production of xylose from sugarcane trash by microwave-assisted maleic acid hydrolysis using response surface methodology (RSM). The factors optimized were acid concentration, time, and temperature. The xylose yield based on the weight of initial biomass was determined and it served as a response variable. Results show that acid concentration and interaction between time and temperature had significant effect on xylose yield. The quadratic regression model generated from the optimization was fit and can be used to predict the xylose yield after hydrolysis with various combinations of acid concentration, time, and temperature. The optimum condition for xylose production from sugarcane trash was using maleic acid of 1.52%, and heating at 176 °C for 6.8 min. At this condition the yield of xylose was 24.3% per initial biomass or 0.243 g/ g biomass.Keywords: maleic acid; microwave heating; response surface methodology; sugarcane trash, xylose

Total Solids and Ether Extract in Fish and Other Marine Products

1963 ◽  
Vol 46 (4) ◽  
pp. 746-748
Author(s):  
H M Risley
Keyword(s):  
Acid Hydrolysis ◽  
Ether Extract ◽  
Total Solids ◽  
Hydrolysis Method ◽  
Canned Fish ◽  
Marine Products ◽  
Frozen Fish

Abstract The first action modified Babcock method for crude fat in canned fish, 18.013, was studied collaboratively on 2 samples of canned fish and 2 samples of frozen fish. The results were compared with those by the official acid hydrolysis method, 18.012. Nine analysts, representing 5 different laboratories, cooperated in the study. The results show that the modified Babcock method has about the same degree of reliability as the acid hydrolysis method. It was recommended that the method be made official, after some slight changes in the wording.

Rapid Method for Separation of Extraneous Materials from Whole and Degerminated Corn Meal, Prepared Mustard, and Soy Flour

1967 ◽  
Vol 50 (3) ◽  
pp. 505-509
Author(s):  
Mary T Miller
Keyword(s):  
Acid Hydrolysis ◽  
Rapid Method ◽  
Chloride Solution ◽  
Collaborative Study ◽  
Mineral Oil ◽  
Soy Flour ◽  
Corn Meal ◽  
Hydrolysis Method ◽  
Separatory Funnel ◽  
Time Required

Abstract A rapid method, based on acid hydrolysis in the presence of mineral oil, has been developed to separate extraneous materials from whole and degerminated corn meal, prepared mustard, and soy flour. Corn meal may be first examined for rodent excreta by method 36.032 and then examined for light filth, or it may be analyzed directly for light filth by the acid hydrolysis method. Soy flour is prepared for analysis by solubilizing the protein in dilute sodium chloride solution in the presence of mineral oil. The Kilborn separatory funnel is used with all 3 products. The proposed method improves recoveries of insect fragments by 13—34% and rodent hair recoveries hy 25—54%. Analyst time required for actual assay is reduced by at least onethird. The method will be subjected to collaborative study

scholarly journals The Effects of Microwave-Assisted Pretreatment and Cofermentation on Bioethanol Production from Elephant Grass

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
Sefrinus Maria Dolfi Kolo ◽  
Deana Wahyuningrum ◽  
Rukman Hertadi
Keyword(s):  
Acid Hydrolysis ◽  
Hydrolysis Product ◽  
Pichia Stipitis ◽  
Pennisetum Purpureum ◽  
Bioethanol Production ◽  
Elephant Grass ◽  
Microwave Assisted ◽  
Liquid Chromatographic Analysis ◽  
High Concentrations ◽  
Liquid Chromatographic

The process of acid hydrolysis using conventional methods at high concentrations results in products having lower yields, and it needs a longer time of process; therefore, it becomes less effective. In this study, we analyzed the effects of microwave-assisted pretreatment and cofermentation on bioethanol production from elephant grass (Pennisetum purpureum). We used a combination of delignification techniques and acid hydrolysis by employing a microwave-assisted pretreatment method on elephant grass (Pennisetum purpureum) as a lignocellulosic material. This was followed by cofermentation with Saccharomyces cerevisiae ITB-R89 and Pichia stipitis ITB-R58 to produce bioethanol. The optimal sugar mixtures (fructose and xylose) of the hydrolysis product were subsequently converted into bioethanol by cofermentation with S. cerevisiae ITB-R89 and P. stipitis ITB-R58, carried out with varying concentrations of inoculum for 5 days (48 h) at 30°C and pH 4.5. The high-power liquid chromatographic analysis revealed that the optimal inoculum concentration capable of converting 76.15% of the sugar mixture substrate (glucose and xylose) to 10.79 g/L (34.74% yield) of bioethanol was 10% (v/v). The optimal rate of ethanol production was 0.45 g/L/d, corresponding to a fermentation efficiency of 69.48%.

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