Optimum extraction method for volatile attractant compounds in cabbage to Pieris rapae

2012 ◽  
Vol 40 ◽  
pp. 201-207 ◽  
Author(s):  
Hiromi Ikeura ◽  
Fumiyuki Kobayashi ◽  
Yasuyoshi Hayata
Keyword(s):  
Extraction Method ◽  
Pieris Rapae ◽  
Volatile Attractant ◽  
Optimum Extraction

Study on Gasoline Combustion Dust with ASE and HPLC

2013 ◽  
Vol 750-752 ◽  
pp. 1852-1854
Author(s):  
Shu Jun Liu ◽  
Kun Feng ◽  
Hao Nan Xu ◽  
Ying Wang
Keyword(s):  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
Solvent Extraction ◽  
Extraction Method ◽  
High Performance ◽  
Accelerated Solvent Extraction ◽  
Extraction Time ◽  
Efficient Extraction ◽  
Optimum Extraction

The gasoline combustion dusts was analyzed by accelerated solvent extraction-high performance liquid chromatography(ASE-HPLC) in this paper. The optimum extraction conditions were that extraction time was 30min, temperature was 120°C and the pressure was 100Mpa. It is a efficient extraction method for a laboratory to quickly extract gasoline combustion dust samples.

Research on the Extraction of Dendranthema Morifolium Volatile Oils by Microwave-Assisted Steam Distillation Extraction

2013 ◽  
Vol 634-638 ◽  
pp. 1049-1053
Author(s):  
Hui Lin Cao ◽  
Shuang Ran Liang ◽  
Yang Tian ◽  
Zhi Ling Chen ◽  
Jian Ping Chao
Keyword(s):  
Extraction Method ◽  
Steam Distillation ◽  
Extraction Efficiency ◽  
Extraction Yield ◽  
Volatile Oils ◽  
Microwave Assisted ◽  
Steam Extraction ◽  
Steam Distillation Extraction ◽  
Optimum Extraction ◽  
Modern Technologies

Microwave-assisted steam extraction system combines the advantages of both conventional and modern technologies. MAE is probably going to be the leading technology in essential oil producing industry. In our research, one-factor and uniform experimental designs are used to determine the optimum extraction conditions, and the results are as follows: the extraction yield is measured as 2.30% with 3h of reflux time, when degree of pulverization is 90, immersing time is 3h, yield of solid to liquid equals 12: 1 ml/g. The chemicals in the production were examined by GC-MS. More than 40 kinds of chemicals were detected, which is consistent with that of the traditional steam extraction method. However, the extraction efficiency is dramatically increased when the steam extraction is assisted with microwave heating, and it is up to 3.8 times.

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.

A novel on-line ultrasonic extraction system for determination of the optimal ultrasonic frequency for plant material

2015 ◽  
Vol 7 (1) ◽  
pp. 336-341 ◽  
Author(s):  
Jianqing Liao ◽  
Baida Qu ◽  
Baoguo Xu
Keyword(s):  
Extraction Method ◽  
Plant Material ◽  
Extraction Yield ◽  
Ultrasonic Extraction ◽  
Extraction System ◽  
Ultrasonic Frequency ◽  
The Novel ◽  
On Line ◽  
Optimum Extraction

The novel extraction system was developed to efficiently extract plant material by determining optimum extraction frequency via two steps. Extraction experiments show that this extraction system gave a higher extraction yield compared to existing ultrasonic extraction method.

scholarly journals Optimalisasi Teknik Ekstraksi dan Isolasi DNA Tanaman Suren (Toona Sureni Merr.) untuk Analisis Keragaman Genetik berdasarkan Random Amplified Polymorphic DNA (RAPD)

2012 ◽  
Vol 14 (1) ◽  
pp. 138 ◽  
Author(s):  
Muh Restu ◽  
Mukrimin Mukrimin ◽  
Gusmiaty Gusmiaty
Keyword(s):  
Genomic Dna ◽  
Extraction Method ◽  
Dna Isolation ◽  
Random Amplified Polymorphic Dna ◽  
Pcr Amplification ◽  
Secondary Compounds ◽  
Extraction Methods ◽  
Extraction Techniques ◽  
High Quality ◽  
Optimum Extraction

The species of trees have different secondary compounds that need optimum extraction techniques. Appropriate extraction techniquesdetermine the quality and quantity of DNA produced. This research aims to found optimal of extraction methods and DNA isolation, thento created genome DNA in high quality and quantity, so that it can be using for genetic variation analyses in Suren (Toona sureni Merr.) byRandom Amplified Polymorphic DNA (RAPD). This study shows that DNA concentrates were 763.3 μg/ml, 180.0 μg/ml, 383.3 μg/ml, and436.7 μg/ml. While based on the results of PCR amplification using the primers OPD 03 shows that the four extraction methods used, the extraction method of number 3 has been able to produce genomic DNA with better quality and more number of bands, although the quantityis lower.

scholarly journals A green extraction design for enhancing flavonoid compounds from Ixora javanica flowers using a deep eutectic solvent

2020 ◽  
Vol 7 (10) ◽  
pp. 201116
Author(s):  
Nina Dewi Oktaviyanti ◽  
Kartini Kartini ◽  
Mochammad Arbi Hadiyat ◽  
Ellen Rachmawati ◽  
Andre Chandra Wijaya ◽  
...  
Keyword(s):  
Extraction Method ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Extraction Process ◽  
Raw Material ◽  
Molar Ratio ◽  
Flavonoid Compound ◽  
Total Flavonoids ◽  
Green Extraction ◽  
Optimum Extraction

In this study, an environmentally friendly extraction method for flavonoid compound from Ixora javanica , as a new raw material candidate for herbal medicine and cosmetics, was developed. The objectives of the present work were to provide recommendations for the optimal extraction conditions and to investigate the effects of any extraction parameters on flavonoid yields from the I. javanica flower. The extraction process was performed using deep eutectic solvent (DES) (choline chloride and propylene glycol at molar ratio of 1 : 1) and the ultrasound-assisted extraction method. Both single-factor and response surface analyses using three-level and three-factor Box Behnken designs were conducted to obtain the optimum flavonoid concentrations. The results showed that the optimum extraction conditions for total flavonoids featured an extraction time of 40 min, 25% water content in DES and a solid-to-liquid ratio of 1 : 25 g ml −1 . An extract obtained under optimum extraction conditions showed higher total flavonoid yields than an ethanolic extract which was used for comparison. Scanning electron microscope images demonstrated that both of the solvents also showed different effects on the outer surface of the I. javanica flower during the extraction process. In summary, our work succeeded in determining the optimum conditions for total flavonoids in the I. javanica flower using a green extraction method.

Effect of Temperature, Moisture Content, Particle Size and Roasting on Shea Butter Extraction Efficiency

2010 ◽  
Vol 6 (2) ◽  
Author(s):  
George Y. Obeng ◽  
Michael K Adjaloo ◽  
Peter Donkor
Keyword(s):  
Particle Size ◽  
Moisture Content ◽  
Extraction Method ◽  
Extraction Efficiency ◽  
Low Pressure ◽  
Oil Extraction ◽  
Screw Press ◽  
Shea Butter ◽  
Extraction Temperature ◽  
Optimum Extraction

The purpose of this study is to establish optimum extraction temperature, moisture content, particle size and the effect of roasting of shea kernels on extraction efficiency for optimum shea butter yield using low pressure (45kg/cm2) manual screw press. Extraction of shea butter is a major income generating activity in Ghana, particularly in the Northern Regions. It is estimated that about 80% of the shea butter produced in Ghana is processed by women using traditional aqueous extraction method. Commercial extraction using continuous screw press accounts for about 20% of production. Oil extraction rates for the traditional aqueous extraction method are relatively low. The traditional aqueous method involves roasting, milling, creaming and boiling, and relies on very low pressure, high moisture of 65-68% and temperatures of 100-140°C. In this study Intermediate Moisture Content (IMC) method was employed. The IMC method involves the use of a low pressure manual screw press to extract butter from shea kernels. The study established an optimum extraction temperature of 60°C and moisture content of 12% at which butter extraction efficiency was between 65.9% and 68.5%. The results revealed that oil extraction efficiency depends on the fineness of paste to be processed and that roasted kernels do not give higher butter yield than unroasted kernels. This is against the traditional belief that high shea butter yield can only be achieved when the kernels are roasted.

scholarly journals Optimization of DHEA Extraction from Sweet Potato Pomace by Ultrasonic-Microwave Synergistic Employing Response Surface Methodology

2019 ◽  
Vol 102 (2) ◽  
pp. 680-682
Author(s):  
Junjian Ran ◽  
Xinhong Liang ◽  
Hanmei Du ◽  
Junliang Sun
Keyword(s):  
Response Surface Methodology ◽  
Response Surface ◽  
Sweet Potato ◽  
Extraction Method ◽  
Extraction Efficiency ◽  
Extraction Yield ◽  
Extraction Temperature ◽  
Liquid Ratio ◽  
Solid Liquid ◽  
Optimum Extraction

Abstract Background: A lot of sweet potato residues (SPR) were discarded and wasted. Objective: To make full use of the SPR. Methods: Ultrasonic microwave synergistic (UMS) extraction method was used to extractdehydroepiandrosterone (DHEA) in SPR. The extraction conditions were optimized by response surface methodology based on single factors. Results: The optimum extraction conditions were 1:25 (solid–liquid ratio), 300 W (microwave power), 30 min (extraction time), and 30°C (extraction temperature). The extraction yield of DHEA from SPR reached 117.25 μg/100 g. Conclusions: The advantage of UMS extractiontechnology is to make full use of the synergistic effect of ultrasound and microwave to improve extraction efficiency. Highlights: The technology provides an effective way to improve the DHEA extraction yield from the SPR in industrial production.

EKSTRAKSI ZAT WARNA ALAMI WORTEL (DAUCUS CAROTA)MENGGUNAKAN PELARUT AIR

EKUILIBIUM ◽  
2014 ◽  
Vol 13 (2) ◽  
Author(s):  
Margono Margono
Keyword(s):  
Daucus Carota ◽  
Extraction Method ◽  
Negative Impact ◽  
Weight Ratio ◽  
Natural Dyes ◽  
Synthetic Dyes ◽  
Influence Of Temperature ◽  
Food Dyes ◽  
Optimum Extraction ◽  
Solvent Volume

<p>Abstract: Since the invention of synthetic dyes, the use of natural dyes became decreased.<br />The synthetic dyes was cheaper and more profitable than natural dyes. However, the use of<br />synthetic dyes for foods and beverages has the negative impact. Therefore the use of natural<br />food dyes is recommended because it is harmless. Carrots are one kind of foods that produced<br />natural dyes. The aims of this research were to determine the influence of temperature and time<br />extraction for the optimum yield. This research used the batch extraction method, using a threeneck</p><p>flask and stirrer at 400 rpm. The extraction was set at (30, 60, 80, 100)˚C and time (20,<br />40, 60, 80) minutes, with a weight ratio of material to solvent volume is 1 g : 10 ml. In this<br />research, the optimum extraction conditions was at 80 ˚C.<br />Keywords: extraction, carrots, dye, yield</p>

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