• Title/Summary/Keyword: extraction yields

Search Result 429, Processing Time 0.031 seconds

Effect of Extraction Temperature on Some Quality of Sea Tangle Extract (다시마 추출액의 특성에 미치는 추출온도의 영향)

  • 이정근;최희숙;윤석근;김우정
    • Journal of the Korean Society of Food Science and Nutrition
    • /
    • v.22 no.6
    • /
    • pp.771-776
    • /
    • 1993
  • Aqueous extraction of sea tangle at the temperature range of 60~10$0^{\circ}C$ was studied for temperature effects on soluble solids and protein yields, amino nitrogen, turbidity and viscosity of extracts. The solids and protein yield were increased as the temperature increased and most of solids and protein were extracted during 1 hour. The supernatant ratio after centrifugation showed significantly low for the extraction at 6$0^{\circ}C$. More temperature effects were found on turbidity and viscosity than yields. A significantly higher total amino nitrogen contents was obtained from higher temperature at initial stage of extraction and then the differences of them became to be narrow as the extraction prolonged further. The low values of 24.1% solids and 13.5% protein yields after 2 hours of extraction at 10$0^{\circ}C$ indicated that most of solids in sea tangle are insouble.

  • PDF

Effects of Enzyme Treatments and Ultrasonification on Extraction Yields of Lipids and Protein from Soybean by Aqueous Process (Aqueous Process를 이용한 대두유와 대두단백의 추출중 효소와 초음파처리가 추출율에 미치는 영향)

  • Yoon, Suk-Hoo;Kim, In-Hwan;Kim, Seung-Ho;Kwon, Tai-Wan
    • Korean Journal of Food Science and Technology
    • /
    • v.23 no.6
    • /
    • pp.673-676
    • /
    • 1991
  • Lipids and protein were extracted simultaneously from soybean flour by aqeous processing. Extraction yields of lipids and protein were 62 and 68%, respectively, when 120-150 mesh full-fat soybean flour was dispersed in six times of water (w/w) at $40^{\circ}C$ and pH 8. Supplementary treatment for the higher extraction yields such as proteolytic enzymes treatment improved extraction yields of lipids and protein up to 86 and 89%, respectively. Ultrasonification also improved extraction yields of lipids and protein up to 90%. Red and yellow colors of aqeous-extracted soybean oil were slightly darker than those of hexane-extracted oil, but were much lighter in colors than those of Folch-extracted oil.

  • PDF

Extraction Yields of Ginseng Saponins in the Extracts of Crude Drug Preparations with Various Concentrations of Ethanol (생약복방제의 에탄을 농도별 엑스중 인삼 사포닌의 이행량 조사)

  • 최강주;고성룡
    • Journal of Ginseng Research
    • /
    • v.15 no.3
    • /
    • pp.192-196
    • /
    • 1991
  • As a part of studios on the Quality control of index components in crude drug preparations, extraction yields of ginseng saponins from crude drug extracts were identified by TLC and quantified by HPLC. So-Shi-Ho-Tang(小柴胡湯), Sa-Kun-Ja-Tang(四君子湯), Yook-Kun-Ja-Tang(六君子湯) and In-sam-Tang(人蔘湯) were extracted with water, 30%-ethanol, 50%-ethanol, 80%-ethanol and absolute ethanol to analyze ginseng saponins in the crude drug extracts prepared with various concentrations of ethanol. Ginseng saponins were extracted considerably more from the extracts with higher concentrations of ethanol than those with water or lower concentrations of ethanol. Extraction yields of ginseng-side-Rb$_1$, -Rb$_2$ and -R$_c$ from four crude drug preparations were the lowest as 4.9~45.9%, 5.0~40.1, and 6.3~43.7% in water extract and the highest as 29.5~62.6%, 26.7~61.4% and 31.4~62.0% in absolute ethanol extract, compared with those of 80%-methanol extracts.

  • PDF

The Comparative Study on Decoctions of Ssanghwa-tang(Shuanghe-tang) Extracted by Different Extraction Conditions (전탕 조건에 따른 쌍화탕 전탕액 비교 연구)

  • Kim, Jung-Hoon;Seo, Chang-Seob;Shin, Hyeun-Kyoo
    • Herbal Formula Science
    • /
    • v.18 no.2
    • /
    • pp.125-134
    • /
    • 2010
  • Objectives : This study was performed to compare the differences between decoctions extracted by different extraction conditions. Methods : Two different decoctions were prepared with pressured or non-pressured extraction conditions for 60, 120 and 180min. The yields of extracts, sugar contents, hydrogen ion concentrations(pH), the contents of reference compounds and individual preferences on Ssanghwa-tang(Shuanghe-tang) were investigated. Results : As extraction time increased, individual preferences for decoctions by pressured extraction tended to increase more than those by non-pressured extraction, and the yields and sugar contents of both decoctions showed the tendency of increase. The pH values of decoctions in pressured conditions were lower than those in non-pressured conditions in all extraction times and both extraction conditions showed decreasing pH values according to increase of extraction times. Of the reference compounds, paeoniflorin showed higher contents in non-pressured conditions than in pressured conditions and the contents of cinnamaldehyde were always lower in non-pressured conditions than in pressured conditions at all time. Conclusions : The decoctions of Ssanghwa-tang(Shuanghe-tang) extracted by pressured or non-pressured extraction for 60, 120, 180min exhibited different individual preferences, yields of extracts, sugar contents, pH, reference compounds contents.

Comparison of Pretreatment Methods for Extraction of Selected Components from Ganoderma lucidum (전처리 방법에 따른 영지버섯 추출액의 품질특성 변화)

  • Chung, Hun-Sik;Youn, Kwang-Sup
    • Food Science and Preservation
    • /
    • v.12 no.2
    • /
    • pp.130-134
    • /
    • 2005
  • This study was conducted to investigate the effects of pretreatment and extraction methods on the water extraction yields of sugar, protein and phenolic compounds, and the antioxidative activity of extract from Ganoderma lucidum. The herb was ground, sifted, and treated for 10 min with microwave (2,450 MHz) and ultrasound (20 kHz), and then extracted by boiling underatmospheric pressure and pressured boiling. Particle size $(0.8\~2.4\;mm)$, extraction time (2 hr) and solvent/solid ratio (20:1) were selected as optimal conditions for extraction.. Microwave and ultrasound treatment increased the extraction yields of total sugar, protein and phenolic compounds and the radical scavenging activity of extract. In comparison with microwave treatment and ultrasound treatment, microwave treatment was more effective than that of ultrasound treatment. The yields of all three compounds and the radical scavenging activity of extract were higher in pressured boiling extraction than in boiling underatmospheric pressure. The results showed that microwave radiation and sonication prior to extraction, and pressured extraction could be utilized for improving the extraction efficiency of G. lucidum.

Separation of Aromatics in Light Cycle Oil by Solvent Extraction - Re-extraction of Aromatics in Extract Phase - (용매 추출법에 의한 분해경유중의 방향족 분리 -추출상중의 방향족의 역수출-)

  • Kim, Su Jin;Kim, Duk-Hyun
    • Applied Chemistry for Engineering
    • /
    • v.8 no.6
    • /
    • pp.967-972
    • /
    • 1997
  • Recovery of aromatics in extract phase which was obtained by batch equilibrium extraction between light cycle oil(LCO) and dimethylsulfoxide(DMSO) solution as solvent was investigated by re-extraction. To select the most suitable re-extraction solvent for recovery of aromatics in extract phase, distribution equilibrium was measured between extract phase and solvents. The solvents used were benzene(B), toluene(T), m-Xylene(mX), n-hexane(Hx) and n-hexane(Hx) and n-Octane(Ot). From the distribution coefficients and yields of aromatics, Hx seemed to be the most suitable. Furthermore, effects of operation parameters for re-extraction of aromatics in the extract phase were studied by batch equilibrium re-extracion with Hx as solvent. Yields of aromatics were found to increase with increasing solvent/feed (extract phase) mass ratio(S/F), while distribution coefficients of aromatics were fixed irrespective of S/F used. Operating temperature did not affect distribution coefficients and yields of aromatics. Distibution coefficients and yields of naphthalene group(carbon numer : 10~12) increased with increasing cabon number. Mass transfer rates of aromatics were also measured with a batch stirred vessel.

  • PDF

Optimization of ultrasound-assisted extraction of glycyrrhizic acid from licorice using response surface methodology

  • Jang, Seol;Lee, A. Yeong;Lee, A. Reum;Choi, Goya;Kim, Ho Kyoung
    • Integrative Medicine Research
    • /
    • v.6 no.4
    • /
    • pp.388-394
    • /
    • 2017
  • Background: The present study optimized ultrasound-assisted extraction conditions to maximize extraction yields of glycyrrhizic acid from licorice. Methods: The optimal extraction temperature ($X_1$), extraction time ($X_2$), and methanol concentration ($X_3$) were identified using response surface methodology (RSM). A central composite design (CCD) was used for experimental design and analysis of the results to obtain the optimal processing parameters. Results: Statistical analyses revealed that three variables and the quadratic of $X_1$, $X_2$, and $X_3$ had significant effects on the yields and were followed by significant interaction effects between the variables of $X_2$ and $X_3$ (p<0.01). A 3D response surface plot and contour plots derived from the mathematical models were applied to determine the optimal conditions. The optimum ultrasound-assisted extraction conditions were as follows: extraction temperature, $69^{\circ}C$; extraction time, 34?min; and methanol concentration, 57%. Under these conditions, the experimental yield of glycyrrhizic acid was 3.414%, which agreed closely with the predicted value (3.406%). Conclusion: The experimental values agreed with those predicted by RSM models, thus indicating the suitability of the model employed and the success of RSM in optimizing the extraction conditions.

A NEW DETAIL EXTRACTION TECHNIQUE FOR VIDEO SEQUENCE CODING USING MORPHOLOGICAL LAPLACIAN OPERATOR (수리형태학적 Laplacian 연산을 이용한 새로운 동영상 Detail 추출 방법)

  • Eo, Jin-Woo;Kim, Hui-Jun
    • Journal of IKEEE
    • /
    • v.4 no.2 s.7
    • /
    • pp.288-294
    • /
    • 2000
  • In this paper, an efficient detail extraction technique for a progressive coding scheme is proposed. The existing technique using the top-hat transformation yields an efficient extraction scheme for isolated and visually important details, but yields an inefficient results containing significant redundancy extracting the contour information. The proposed technique using the strong edge feature extraction property of the morphological Laplacian in this paper can reduce the redundancy, and thus provides lower bit-rate. Experimental results show that the proposed technique is more efficient than the existing one, and promise the applicability of the morphological Laplacian operator.

  • PDF

The usability evaluation of domestic urban sewage sludge as feedstock for biodiesel production( I ) - Comparison of the yields and composition of fatty acid methyl esters - (바이오디젤 생산을 위한 원료로서 국내 도시 하수슬러지의 활용성 평가( I ) - 지방산메틸에스테르(FAMEs)의 수율 및 조성 비교 -)

  • Kim, Nack-Joo;Jung, You-Won;Lee, Ik-Soo
    • Journal of Korean Society of Water and Wastewater
    • /
    • v.26 no.1
    • /
    • pp.115-121
    • /
    • 2012
  • This study was performed to assess the possibility of application of sewage sludge which is the side-product from domestic sewage treatment plant to the materials for biodiesels by investigating the yields and composition of the lipids and fatty acid methyl esters(FAMEs) from soxhlet extraction and in-situ transesterification. As the results, yields of in-situ transesterification were higher than soxhlet extraction. In comparison by sewage sludge type, yields of sewage sludge mixed nightsoil or livestock were higher than a single sewage sludge. And maximum yield showed up to 14 wt%. Fatty acid composition of extracted lipids and synthesized FAMEs consists of palmitic acid(C16:0), palmitoleic acid(C16:1), stearic acid(C18:0), oleic acid(C18:1), and linoleic acid(C18:2).

Relationship between Chemical Components and their Yields of Red Ginseng Extract Extracted by Various Extracting Conditions (적출조건에 따른 홍삼엑기스의 구성성분 및 수율간의 상관)

  • 성형순;윤석권
    • Journal of Ginseng Research
    • /
    • v.9 no.2
    • /
    • pp.170-178
    • /
    • 1985
  • Korean red ginseng tails was extracted with solutions having various ethanol concentration at the temperature range of 70-100 $^{\circ}C$. Extraction was carried out for 1-5 times of 8 hours at given temperature. The results obtained on physicochemical properties of yields, saponins, sugars, minerals, color and viscosity were analyzed statistically to find the correlation with extracting conditions. A very high positive correlation was found between extraction time and cumulative values of yields of chemical components. Increase in ethanol concentration affected negatively on viscosity, absorbencies and yields of soluble solids and minerals. Some of the properties also showed a high correlation with temperature increase. Equations were also derived from the significant results on correlation analysis.

  • PDF