scholarly journals Optimum Extraction Condition of Uehara Cycle under OTEC Condition.

2003 ◽  
Vol 69 (680) ◽  
pp. 901-908 ◽  
Author(s):  
Nobuo NODA ◽  
Yasuyuki IKEGAMI
Keyword(s):  
Extraction Condition ◽  
Optimum Extraction ◽  
Optimum Extraction Condition

Optimization of Extraction Conditions of Essential Oil from Latifolia miq Roots and Stems with Supercritical CO2 Fluid

2013 ◽  
Vol 726-731 ◽  
pp. 4512-4516
Author(s):  
Ren Yong Gu ◽  
Zhi Ping Li
Keyword(s):  
Essential Oil ◽  
Optimum Condition ◽  
Raw Materials ◽  
Extraction Process ◽  
Orthogonal Test ◽  
Single Factor ◽  
Extraction Condition ◽  
Optimum Extraction ◽  
Optimum Extraction Condition

Studying on the extraction process of essential oil from Latifolia Miq roots and stems by Supercritical CO2 extraction. The effects on extracting ratio were investigated by using single factor test, adding content of grinding fineness of raw materials,extracting temperature, extracting pressure and extracting time. The optimum extraction condition was determined by orthogonal test. The results showed that the optimum condition of the extraction was as follows: grinding fineness 90 mesh, extracting temperature 45 °C, extracting pressure 20 MPa and extracting time 2.5 h.

Extraction of Polyethylene Residue Components in Soil

2012 ◽  
Vol 724 ◽  
pp. 65-68
Author(s):  
Cheng Chen ◽  
Xue Gang Luo ◽  
Xiao Li Xiong ◽  
Xiao Yan Lin
Keyword(s):  
Molecular Weight ◽  
Soil Type ◽  
Average Molecular Weight ◽  
Extraction Ratio ◽  
Extraction Time ◽  
Extraction Condition ◽  
The Times ◽  
Optimum Extraction ◽  
Total Extraction ◽  
Optimum Extraction Condition

The extraction of polyethylene residue components in soil was presented in this work, where polyethylene (PE) powder (Mw=5598) was taken as a simulated polyethylene residue, and decalin was as an excellent solvent. The effects of times of reflux extraction, total extraction time and soil type on the extraction ratio were investigated, aimed at finding out the optimum extraction condition. Results show that the optimum extraction ratio achieves up to 90 % (w/w) at 100 after extraction for 20 mins thrice. Meanwhile, the times of reflux extraction has the most significant influence on extraction ratio, followed by the total extraction time. However, soil type has little influence. The FTIR spectra illustrates that the structure of PE is not destroyed during the extraction. However, the molecular weight and molecular weight distribution test show the average molecular weight of PE decreases after the extraction, which is possibly caused by the degradation of PE.

scholarly journals CENTRAL COMPOSITE DESIGN FOR OPTIMIZING EXTRACTION OF EGCG FROM GREEN TEA LEAF (CAMELLIA SINENSIS L.)

2018 ◽  
Vol 10 (6) ◽  
pp. 211
Author(s):  
Eka Indra Setyawan ◽  
Erna Prawita Setyowati ◽  
Abdul Rohman ◽  
Akhmad Kharis Nugroho
Keyword(s):  
Water Temperature ◽  
Green Tea ◽  
Epigallocatechin Gallate ◽  
Extraction Yield ◽  
Hot Water ◽  
Extraction Condition ◽  
Optimum Extraction ◽  
Central Composite ◽  
Brewing Time ◽  
Optimum Extraction Condition

Objective: This study was intended to optimize the extraction condition using central composite design.Methods: Central composite cesign with three independent variables, namely water temperature, brewing time, and brewing number were used to obtain the optimum extraction condition. Two dependent variables, namely yield of extraction and epigallocatechingallate level were used as a response parameter. Epigallocatechin gallate level was determined by using high-performance liquid chromatography method.Results: Extraction yield was varied from 0.30 g to 0.72 g. All variables, namely water temperature, brewing time, and brewing number were able to increase the extraction yield. Epigallocatechingallate level was varied from 190.23 mg/g to 301.74 mg/g. Water temperature, brewing time, and both interaction were able to increase the epigallocatechin gallate level in green tea extract.Conclusion: Optimum extraction condition was shown using hot water at a temperature of 95 °C for 20 min and two-times infusions. The condition obtained extraction yield and epigallocatechingallate of 0.70 g and 286.87 mg/g dry weight, respectively.

scholarly journals Determination of optimum extraction condition for edible oil and β-carotene from carrot peel (Daucus carota L.) using supercritical carbon dioxide

2019 ◽  
Vol 18 (2) ◽  
pp. 97-115
Author(s):  
Suthida Akkarachaneeyakorn ◽  
Tanasith Tangpaiboonpongsa ◽  
Mintra Chuakam ◽  
Kwanchanok Dasiri ◽  
Pattama Phasuthan ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Daucus Carota ◽  
Edible Oil ◽  
Extraction Condition ◽  
Daucus Carota L ◽  
Optimum Extraction ◽  
Β Carotene ◽  
Optimum Extraction Condition

scholarly journals Studied on the extraction, response surface analysis and antioxidant activity of flavonoids in the Momordia cochinchinensis seeds

2018 ◽  
Vol 238 ◽  
pp. 04004
Author(s):  
Junyu Jiang ◽  
Aiping Fei ◽  
Yong Wang ◽  
Zhigang Fang ◽  
Yingxue Teng ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Response Surface ◽  
Surface Analysis ◽  
Ethanol Concentration ◽  
Response Surface Analysis ◽  
Extraction Time ◽  
Average Yield ◽  
Extraction Condition ◽  
Optimum Extraction ◽  
Optimum Extraction Condition

This text was mainly studied the extraction flavonoids technology from Momordia cochinchinensis seeds. The optimum extraction condition was as follows: when the ratio of liquid to solid was 20:1, the ethanol concentration was 90% and the extraction time was 2h. Under this condition, the actual average yield of flavonoids could reach 0.363%.

Investigation on the Extraction of Aluminum and Iron from Fly Ash by Sodium Carbonate Fusion Method

2013 ◽  
Vol 807-809 ◽  
pp. 1262-1265
Author(s):  
Hong Jing Han ◽  
Yan Guang Chen ◽  
Jia Lu ◽  
Dan Dan Yuan ◽  
Jun Song ◽  
...  
Keyword(s):  
Fly Ash ◽  
Economic Benefit ◽  
Value Added ◽  
Fusion Method ◽  
Mass Ratio ◽  
Extraction Condition ◽  
Iron Extraction ◽  
Orthogonal Experiments ◽  
Optimum Extraction ◽  
Optimum Extraction Condition

In recent years, utilization of fly ash has gained much attention in public and industry, which will help reduce the environmental burden and enhance economic benefit. In the utilizations of fly ash, the most high value-added applications is extraction of metal elements from fly ash. In this paper, the aluminum and iron extraction was investigated by orthogonal experiments. The results show that the optimum extraction condition was reaction temperature 800 °C, reaction time 3 h, the mass ratio of fly ash to Na2CO3 was 1:1.5.

Isolation and Characterization of Rice Prolamin

2011 ◽  
Vol 365 ◽  
pp. 187-193
Author(s):  
Xin Xin Song ◽  
Xian Ming Zhao ◽  
Ya Nan Li ◽  
Xue Peng ◽  
Shu Hong Sun ◽  
...  
Keyword(s):  
Ethylene Glycol ◽  
Rice Flour ◽  
Extraction Condition ◽  
Yield Efficiency ◽  
Isolation And Characterization ◽  
Sds Page ◽  
Optimum Extraction ◽  
Optimum Extraction Condition

Rice prolamin, constituting 10, 13 and 16 kDa polypeptides, is indigestible and may work as a kind of ‘resistant protein’. To investigate the effective method for isolation of prolamin, in this study, prolamin fractions were extracted from defatted rice flour by 70% ethanol, 55% and 60% n-propanol, 55%, 60% and 100% ethylene glycol, and 60% isopropanol, respectively. The isolated prolamin fractions were compared and characterized by yield, efficiency of extraction and SDS-PAGE patterns. Our results indicated that the optimum extraction condition for isolation of prolamin was 55% n-propanol, with 13 kDa and 16 kDa as the dominant fractions in prolamin.

scholarly journals Optimization of Processing Parameters for Extraction of Amylase Enzyme from Dragon (Hylocereus polyrhizus) Peel Using Response Surface Methodology

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Mehrnoush Amid ◽  
Mohd Yazid Abdul Manap ◽  
Norkhanani Zohdi
Keyword(s):  
Storage Stability ◽  
Specific Activity ◽  
Mixing Time ◽  
Temperature Stability ◽  
Processing Parameters ◽  
Ph Stability ◽  
Extraction Condition ◽  
Main Effect ◽  
And Storage ◽  
Optimum Extraction

The main goal of this study was to investigate the effect of extraction conditions on the enzymatic properties of thermoacidic amylase enzyme derived from dragon peel. The studied extraction variables were the buffer-to-sample (B/S) ratio (1 : 2 to 1 : 6, w/w), temperature (−18°C to 25°), mixing time (60 to 180 seconds), and the pH of the buffer (2.0 to 8.0). The results indicate that the enzyme extraction conditions exhibited the least significant (P<0.05) effect on temperature stability. Conversely, the extraction conditions had the most significant (P<0.05) effect on the specific activity and pH stability. The results also reveal that the main effect of the B/S ratio, followed by its interaction with the pH of the buffer, was significant (P<0.05) among most of the response variables studied. The optimum extraction condition caused the amylase to achieve high enzyme activity (648.4 U), specific activity (14.2 U/mg), temperature stability (88.4%), pH stability (85.2%), surfactant agent stability (87.2%), and storage stability (90.3%).

scholarly journals High Density Supercritical Carbon Dioxide for the Extraction of Pesticide Residues in Onion with Multivariate Response Surface Methodology

Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 1012
Author(s):  
Teshome Tolcha ◽  
Tura Gemechu ◽  
Said Al-Hamimi ◽  
Negussie Megersa ◽  
Charlotta Turner
Keyword(s):  
Carbon Dioxide ◽  
Response Surface ◽  
Extraction Method ◽  
Matrix Effects ◽  
Extraction Condition ◽  
Independent Variables ◽  
Multivariate Response ◽  
Large Matrix ◽  
Food Matrices ◽  
Optimum Extraction

The excessive use of pesticides is a serious health problem due to their toxicity and bioaccumulation through the food chain. Due to the complexity of foods, the analysis of pesticides is challenging often giving large matrix effects and co-extracted compounds. To overcome this problem, a selective and “green” supercritical fluid extraction method was developed, using neat carbon dioxide as a solvent at pressures of up to 800 bars. A Box–Behnken response surface experimental design was used, with the independent variables of density (0.70−1.0 g mL−1), temperature (40−70 °C), and volume (10−40 mL) of solvent, and the dependent variable of extracted amount of pesticides. The optimum extraction condition was found at the use of 29 mL of supercritical CO2 at 0.90 g mL−1 and 53 °C (corresponding to 372 bars of pressure). It was observed that increasing the density of CO2 significantly increased the extraction recovery of endrin and 2,4′-dichlorodiphenyldichloroethane. Matrix-matched calibration curves showed satisfactory linearity (R2 ≥ 0.994), and LODs ranged from 0.2 to 2.0 ng g−1. Precision was lower than 11% and recoveries between 80%–103%. Thus, the developed method could efficiently be used for trace analysis of pesticides in complex food matrices without the use of organic solvents.

Research on the Extraction Process of Water-Soluble Asparagus Powder and Removal of Free Radical

2013 ◽  
Vol 284-287 ◽  
pp. 385-389
Author(s):  
You Shun Peng ◽  
Shi Tao Song ◽  
Shu Yuan Wang ◽  
Xue Fang Zheng ◽  
Qi Lian
Keyword(s):  
Free Radicals ◽  
Hydroxyl Radicals ◽  
Extraction Process ◽  
Water Soluble ◽  
Raw Material ◽  
Liquid Ratio ◽  
Extraction Condition ◽  
Yield Rate ◽  
Solid Liquid ◽  
Optimum Extraction

The optimum extraction condition of water-soluble asparagus powder through water boiling method is to extract it twice, in the first extraction, 8% is set as the solid-liquid ratio, 15 minutes is set as the soak time and 40 minutes is set as the boiling time; in the second extraction, 10% is set as the solid-liquid ratio, 40 minutes is set as the boiling time. Under this condition, the dry yield rate is 33.98%, and the total active substance yield rate is 10.34% (including flavones yield rate of 1.0%, saponin yield rate of 5.99%, and polysaccharide yield rate of 3.35%). Water-soluble asparagus powder has good removal effects on hydroxyl radicals, superoxide anion free radicals, and DPPH free radicals. The water-soluble asparagus powders made from the raw material in different pick-time have different removal effects on DPPH free radicals, and the asparagus powder made from asparagus picked in August, September, and October is better.The best is to read these instructions and follow the outline of this text.

Sign in / Sign up

Export Citation Format

Share Document