• Title, Summary, Keyword: Proximate composition

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Effect of Proximate Composition Ratios for Biogas Production

  • Kim, Min-Jee;Kim, Soo-Ah;Kim, Sang-Hun
    • Journal of Biosystems Engineering
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    • v.42 no.3
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    • pp.155-162
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    • 2017
  • Purpose: The objective of this study was to evaluate the biogas productivity of agricultural by-products (ABPs) based on their proximate composition. Specifically, the effects of proximate composition were investigated, and a new mixing method was developed using various ABPs that are difficult to digest for biogas production. Methods: Experiments were conducted to compare the biogas productivity between a single ABP and a mixture of ABPs that had the same proximate composition as the single ABP. To match the proximate compositions of radish waste and corn distiller's dried grains with solubles (DDGS), mixed ABPs were made from various ABPs. Biogas potential tests (BMP tests) were performed at an organic loading rate (OLR) of 2.5 g VS/L and a feed to microorganism ratio (F/M) of 0.5 under the mesophilic condition. Results: The individual ABPs (radish and corn DDGS) and the mixed ABPs (cabbage waste with skim milk waste, bean-curd waste with skim milk waste, and some others) produced similar amounts of biogas. Conclusions: The new mixing method based on proximate composition can be applied to other ABPs and organic wastes from factories and municipal waste treatment plants to develop renewable energy and effective waste treatment methods.

Proximate Analysis, Mineral and Fatty Acid Composition of Domestic and Glyphosate- Tolerant HS2906 Soybean (국내산 및 제초제 내성 콩(HS2906)의 일반성분, 무기질 및 지방산 조성)

  • Yang Yun-Hyoung;Lee Jeong-Hee;Kim Hyoung-Chin;Yoon Won-Kee;Kim Hwan-Mook;Kim Mee-Ree
    • Journal of the East Asian Society of Dietary Life
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    • v.15 no.1
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    • pp.71-77
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    • 2005
  • Proximate analysis, mineral and fatty acid composition of three conventional domestic soybean cultivars and two imported ones including glyphosate-tolerant HS2906 were evaluated by AOAC method, ICP-AES and gas chromatography. There were several differences in the proximate analysis among three conventional domestic soybean cultivars ; higher crude fat in the cultivar Hwanggumkong, higher crude protein in Pungsankong, and higher carbohydrate and crude ash in Duyukong. The ranges of contents of proximate components of domestic cultivars were similar to the data previously reported. There were no significant differences in proximate analysis between conventional soybean WS82 and glyphosate-tolerant HS2906 ; 23.55-23.90% of crude fat, 34.22-35.55% of crude protein, 6.25-6.45% of crude ash, and 25.35-26.47% of carbohydrate. The mineral and fatty acid compositions of HS2906 were similar to those of conventional soybeans previously reported.

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Proximate Composition and Nutritional Evaluation of Fisheries Products from the Korean Coast (한국 연안산 수산물의 일반성분 조성 및 영양평가)

  • Mok, Jong-Soo;Lee, Doo-Seog;Yoon, Ho-Dong;Park, Hee-Yeon;Kim, Yeon-Kye;Wi, Chong-Hwan
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.40 no.5
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    • pp.259-268
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    • 2007
  • To measure the proximate composition of fisheries products and to evaluate their nutritional value, we collected individuals from 101 species from the east (Pohang), west (Gunsan), and south (Tongyeong) coasts of Korea: 51 fish species, 32 species of molluscan shellfish (Gastropoda and Bivalvia), 6 species of Cephalopoda, 8 species of Crustacea, and 4 other species. The proximate composition of fish was $75.3{\pm}5.0%\;moisture,\;19.1{\pm}2.7%\;protein,\;3.8{\pm}4.1%\;lipids,\;0.4{\pm}0.3%$ carbohydrates, and $1.4{\pm}0.3%$ ash. The proximate composition of molluscan shellfish was $79.1{\pm}3.2%\;moisture,\;14.2{\pm}3.2%\;protein,\;0.7{\pm}0.6%\;lipids,\;3.9{\pm}1.9%$ carbohydrates, and $2.1{\pm}0.4%$ ash. We observed clear regional variation in the lipid content of some fish species. Specifically, the lipid content of gizzard shad (Clupanodon punctatus) was highest in the autumn, while the lipid contents of red seabream (Pagrus major) and purple pike conger (Muraenesox cinereus) were highest in the winter. The daily average intake of the proximate composition through fisheries products consisted of 11.7 g of protein, 1.9 g of lipids, 1.1 g of carbohydrates, and 1.1 g of ash. The respective intakes of protein, lipids, and carbohydrates from fisheries products were about 19.3, 3.6, and 0.3% of the nutrient reference values set by the Korean Food & Drug Administration. Therefore, fisheries products playa very important role as a source of protein.

Measurement of the proximate components of fresh ginseng (Panax ginseng C.A Meyer) using Near-Infrared Reflectance Spectroscopy (근적외선(NIR) 분광법에 의한 수삼의 성분 측정)

  • Chang, Kyu-Seob;Lee, Eui-Suk;Lee, Gyu-Hee
    • Korean Journal of Agricultural Science
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    • v.28 no.2
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    • pp.116-124
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    • 2001
  • The measurement values of proximate composition in fresh ginseng could provide the important information for red ginseng processing. The measurement of them were performed by near-infrared (NIR) spectroscopy. Linear regression model for the predicting of proximate composition was developed and validated. The regression values of moisture, crude starch, crude ash, crude fiber, calcium, and magnesium contents were shown as 0.918, 0.951, 0.897, 0.728, 0.933, and 0.390, respectively. Therefore, the proximate composition of fresh ginseng could be measured by NIR, feasibly.

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Comparison of Major Nutrients in Eels Anguilla japonica Cultured with Different Formula Feeds or at Different Farms

  • Seo, Jae-Sung;Choi, Jae-Hee;Seo, Ji-Hun;Ahn, Tae-Ho;Chong, Won-Seog;Kim, Seung-Hoon;Cho, Hye-Sun;Ahn, Jun-Cheul
    • Fisheries and aquatic sciences
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    • v.16 no.2
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    • pp.85-92
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    • 2013
  • To determine the relative importance of two main factors, diet or culture environment, that affect the proximate composition and main nutritive ingredients (vitamin A, vitamin E, cholesterol, fatty acid composition) in cultured eels, we analyzed the composition of eels fed diets of formula feed (FF) produced by four different companies and of eels cultured at five different eel farms that provided only one of the four different FFs. The four commercial eel FFs did not markedly differ in proximate composition or major nutritive compounds, and consequently, these variables did not significantly differ in cultured eels fed the different FFs. The FF imported from Japan was marginally superior to the two domestic commercial FFs and the FF imported from Taiwan in terms of the proximate composition and main nutritive ingredients of both the FF itself and the eels cultured on it. However, proximate composition and main nutritive ingredients significantly differed among eels cultured at the five farms that used a different FF and among eels fed the four different FFs at the same farm. In conclusion, the difference in quality between domestic and Japanese FFs in terms of eel culture was small, whereas physical or chemical environmental differences among farms during eel culture may more strongly affect the proximate composition and levels of the main nutritive ingredients in cultured eels.

Ecological Characteristics and Proximate Composition of Muraenesox cinereus off the Southern Coast of Korea (한국 남해 연안 갯장어(Muraenesox cinereus)의 생태학적 특성 및 식품 성분 비교)

  • Koh, Eun Hye;Kwon, Dae-Hyeon;Nam, Ki Ho;Kim, Yeonghye;Jang, Choong-Sik
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.52 no.2
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    • pp.173-179
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    • 2019
  • We investigated the ecological characteristics and proximate composition of Muraenesox cinereus off the southern coast of Korea. Anal length distribution, sex ratio, condition factor of M. cinereus individuals caught by costal complex (longline) fisheries were investigated from June to October 2018. The mean anal length was 23.5 cm, which was less than $L_{50}$, indicating that the individuals were mostly immature. Sex ratio is 9:1, we captured 382 females and 29 males, which produced a significantly different ratio (P<0.05). Condition factor remained constant over the study period. The proximate composition of M. cinereus individuals was analyzed from July to October 2018. No significant differences in moisture, crude lipid, crude protein, and ash content were observed between individuals caught in summer and those caught in fall.

The Analysis of Proximate Composition, Minerals and Amino Acid Content of Red Alga Pyropia dentata by Cultivation Sites

  • Jung, Sang-Mok;Kang, Seul-Gi;Kim, Kwang-Tae;Lee, Han-Joo;Kim, A-Reum;Shin, Hyun-Woung
    • Korean Journal of Environment and Ecology
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    • v.29 no.1
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    • pp.1-6
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    • 2015
  • In this study, the proximate composition of Pyropia dentata was compared by the analysis of minerals and amino acids that were produced at Seocheon, Chungcheongnam-do and at Wando and Jangheung, Jeollanam-do. Moisture, ash and crude proteins were analyzed using the AOAC method, and crude lipid was analyzed using the Soxhlet method, and inorganic analysis was performed using ICP-OES. Amino acid was used for the amino acid analyzer. The proximate composition analysis, moisture content, maximum values were displayed in Wando while the maximum content of ash appeared at Jangheung's Pyropia. Crude proteins was appeared at Seocheon's Pyropia and the maximum amount of crude lipid, carbohydrate was appeared in Wando's Pyropia. Inorganic analysis, calcium, potassium, magnesium, sodium, phosphorus, cobalt, chromium, copper, iron, manganese, nickel, zinc were analyzed from the Seocheon's Pyropia, however, cobalt, chromium, and nickel was not detected in Wando's Pyropia. For amino acid analysis, a total of 17 amino acids were detected: leucine, valine, aspartic acid, glutamic acid, and the amount of alanine accounted for about 57 % of total amino acids(26.1-28.7 %). The proximate composition, minerals, and amino acid of Pyropia dentata were different depending on the coastal ecological habitats.

Analysis of Dietary Fiber, Mineral Content and Fatty Acid Composition in Cheonggak (Codium fragile) (청각의 식이섬유, 미네랄 함량 및 지방산 조성 분석)

  • Seo, Uk-Hyeon;Kang, Hyo-Jeong;Yoon, Ki-Bok;An, Yang-Joon;Kim, Jung-Beom
    • The Korean Journal of Food And Nutrition
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    • v.32 no.4
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    • pp.328-334
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    • 2019
  • The objective of this study was to analyze proximate composition, dietary fiber, mineral content, fatty acid composition in Cheonggak (Codium fragile) in order to encourage the consumption of Cheonggak. The proximate composition of Cheonggak was found to be 5.51% moisture, 24.09% crude ash, 15.79% crude protein, 2.47% crude lipid and 45.31% dietary fiber. The major mineral content of Cheonggak was Na 8,950 mg/100 g, Mg 1,252 mg/100 g, Ca 807 mg/100 g, K 457 mg/100 g, and trace mineral content was Fe 26 mg/100 g, Mn 8 mg/100 g, Zn 0.4 mg/100 g. Palmitic acid 36.86% and ${\alpha}$-linolenic acid 20.14% were the most contained fatty acids in Cheonggak. The ratio of saturated fatty acids to unsaturated fatty acids was 85.49% while ${\omega}-6$ fatty acids to ${\omega}-3$ fatty acids were 59.10%. Based on the proximate composition, dietary fiber, mineral content, and fatty acid composition, Cheonggak was judged to be a major source of dietary fiber and Mg and Ca, and it was deemed to be helpful in promoting health, including the prevention of hyperlipidemia. Cheonggak contained valuable nutrients similar to seaweed, which is produced and consumed the most in Korea. Thus, it is necessary to include Cheonggak in the food items.

To develop the classification method of Agricultural by-productions for biogas production

  • Kim, Minjee;Kim, Sanghun
    • International Journal of Internet, Broadcasting and Communication
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    • v.7 no.2
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    • pp.155-160
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    • 2015
  • The objective of this study was to develop the classification method of various organic wastes. Specifically, the effects of proximate composition on the biogas production and degradation rates of agricultural by-production was investigated and a new standards for mixture of various organic wastes based on proximate composition combination was developed. Agricultural by-products (ABPs) with medium total carbohydrate, medium crude protein and low fat contents demonstrated the single step digestion process. ABPs with low total carbohydrate, high crude protein and high fat contents demonstrated the two step digestion process of Diauxic growth. The single ABP (Class No. 15) and the mixed ABPs (Class No. 12+18, 6+12+22, 9+12+18) after 10days showed the similar biogas yield pattern. We can use the classification method for the more ABPs and organic wastes from factory and municipal waste treatment plant for the high efficient biogas production.

Proximate, Mineral and Sugar Composition of Rehmannia glutinosa by Cultivars (품종별 지황의 일반성분, 무기질 및 당 조성)

  • Oh, Hye-Lim;Kim, Na-Yeon;Lee, Kun-Jong;Yang, Kee-Heun;Doh, Eun-Soo;Song, Mi-Ran;Park, Jong-Yoon;Kim, Mee-Ree
    • Journal of the East Asian Society of Dietary Life
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    • v.22 no.3
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    • pp.365-370
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    • 2012
  • Proximate composition, reducing sugar, and mineral content of several cultivars of Rehmannia glutinosa were analyzed. the moisture and soluble solid content of fresh Rehmannia glutinosa ('Korea', 'Kokang', 'Sewon 10', 'Sewon 11' and 'Jihwang 1') were 74.6~78.4% and $19.6{\sim}22.4^{\circ}Brix$, respectively. Proximate composition of dried Rehmannia glutinosa ranged from 82.91~86.94% carbohydrate, 3.38~5.70% crude protein, 2.5~3.0% crude ash and 3.47~3.80% fiber. Sugar composition by HPLC/ELSD showed that sucrose (4.49~7.75 g/100 g), raffinose (2.96~4.78 g/100 g) and stachyose (42.36~45.87 g/100 g) were present, whereas monosaccharides were not detected in 5 cultivars of dried Rehmannia glutinosa. Mineral compositions of dried Rehmannia glutinosa by ICP-AES were Ca (639.9~782.0 ppm), Fe (128.5~634.9 ppm), Na (119~150 ppm), K (6,639.1~10,448.0 ppm), Mg (372.2~981.8 ppm) and Zn (8.8~474.2 ppm). However, Co and Mo were not detected. Among 5 cultivars of Rehmannia glutinosa, 'Kokang' and 'Sewon 10' contain higher amounts of Fe, Ca, K, Mg, Cu and Zn than the other cultivars.