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Changes in Flavor Components during Ripening of Fermented Sausages (발효소시지의 숙성에 따른 풍미성분의 변화)

  • 양종범
    • The Korean Journal of Food And Nutrition
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    • v.12 no.4
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    • pp.380-386
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    • 1999
  • Fermented sausages inoculated with starter cultures which were combined Lactobacillus curvatus and Staphylococcus carnosus(LCSC), Lactobacillus plantarum and Staphylococcus carnosus(LPSC) were manufac-tured. changes in chemical composition salinity weight loss fatty acids inosine monophosphate(IMP) and hypoxanthine (Hx) and fee amino acids during ripening of fermented sausages were investigated. Due to drying the water content was decreased while the protein and fat contents salinity and weight low were increased during ripening. No significant differences between LCSC and LPSC were found for chemical composition salinity and weight loss. During ripening unsaturated fatty acid contents was dec-reased while saturated fatty acid contents was increased. At the end of the ripening the levels of mon-oenes were slightly higher in the LPSC than in the LCSC. In both treatments IMP contents were dec-reased but no changes were observed in Hx contents during ripening. Due to ripening the increase in total and individual free amino acids were observed and contents of glutamic acid alanine leucine and lysine were greatly increased.

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Fatty Acid Composition of Lipids obtained from Korean Soybean Varieties (한국산 콩의 품종별 지방질의 지방산 조성)

  • Yoon, Tai-Heon;Im, Kyung-Ja;Kim, Dong-Hoon
    • Korean Journal of Food Science and Technology
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    • v.16 no.4
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    • pp.375-382
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    • 1984
  • The fatty acid compositions of lipids from five local varieties and three imported varieties of soybean were determined. Total and free lipids of the samples were extracted with chloroform-methanol mixture (2:1, v/v) and ethyl ether, respectively. The ether-extracted samples were extracted again with water saturated n-butanol to obtain bound lipids. The average percent contents of the lipid fractions were 21% (total), 18% (free), and 3.3% (bound). The results indicated that seven fatty acids (10:0, 12:0, 14:0, 16:0, 17:0, 20:0 and 22:0) were identified as minor fatty acids for all the varieties examined in this study. The relative contents of 18:2 were the highest (50.1-59.7%) in all the lipid fractions, and the contents in total and free lipids were in-fluenced by the local varieties. Little difference in fatty acid composition was noted between the total and free lipids of the samples. Total and free lipids contained more 18:1 (about 10%) and less 16:0 (about 40%) and 14:0 (about 34%) than did the bound lipids. The relative percent contents of 18:3 in the total, free and bound lipids were on average 8.9, 9.0, and 7.3 percents. The content in the total lipids of Gwanggyo varieties showed the highest level (11.1%), and in the bound lipids of Eundaedoo varieties the lowest (6.0%). In case of the total and free lipids, those varieties which showed higher relative contents of 18:1 generally had lower relative contents of 18:2 and 18:3.

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Chemical Properties of bamboo Shoots and Their Changes of Chemical Components during The Manufacture of Pickles (죽순의 화학적 특성 및 염장 죽순 제조과정 중 성분 변화)

  • 정희종
    • The Korean Journal of Food And Nutrition
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    • v.12 no.6
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    • pp.575-581
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    • 1999
  • In result of chemical properties of bamboo shoots and changes of chemical components of salted bamboo shoots during 120 days salting, the contents of moisture crude fat tannin and ascorbic acid were decreased but those of crude protein curde ash and salt concentration were increased. The main free amino acids of bamboo shoots were serine arginine alanine leucine and tyrosine. The content of total free amino acid was rapidly decreased in 80days-past of salting and after that slowly decresed. Wang bamboo shoots was the highest as 1060.18mg/100g in content of total free amino acid. The main mineral elements were K, P, Na and Mg. The contents of Fe and K were the hihest among them. The contents of P, Fe, Zn. Mn. Ge and Cu were decreased but K, Mg, Na and Ca were increased during salting. When fresh bamboo shoots were compared with salted bamboo shoots fresh bamboo shoots contained the contents of moisture crude protein crude fat tannin and ascorbic acid more than salted bamboo shoots did but the less the contents of ash fiber and salt concentration.

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Photosynthetic Activity, and Lipid and Hydrocarbon Production by Alginate-Immobilized Cells of Botryococcus in Relation to Growth Phase

  • Yashverry, Singh
    • Journal of Microbiology and Biotechnology
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    • v.13 no.5
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    • pp.687-691
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    • 2003
  • Whole-cell immobilization of the hydrocarbon rich microalgae, Botryococcus braunii and B. protuberans, in alginate beads under air-lift batch cultures resulted in a significant increase in chlorophyll, carotenoid, dry weight, and 1ipid contents at stationary and resting growth phases, as compared to free cells. Photosynthetic activity in both the species, of Botryococcus was enhanced, relative to free cells, at any growth phase of cultures. Immobilization exerted a protective influence on ageing of the cultures as reflected by higher chlorophyll and dry weight contents. Entrapment also stabilized the chlorophyll and carotenoid contents even at stationary and resting phases as compared to free cells in both the species.

Free amino acid, fatty acid composition and mineral content in dried alaska pollack and the changes of mineral content according to cooking time (북어의 아미노산, 지방산, 무기질 함량 및 조리시간별 무기질 함량 변화에 대하여)

  • 주은정
    • Journal of the Korean Home Economics Association
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    • v.23 no.1
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    • pp.25-31
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    • 1985
  • This study designed not only to elucidate free amino acid, fatty acid composition and mineral content in dried alaska pollack but also to examine calcium, magnesium, poassium and sodium contents in its cooking broth according to each boiling time such as 2.5, 5, 10, 20, and 30 minutes. RESULTS : 1. Glutamic acid in dried alaska pollack was the most abundant free amino acid and was followed in order of aspartic acid, lysin, leucine and histidine. They composed of 50.95% of the total amino acid contents. 2. In dried alaska pollack the most abundant fatty acid was palmitic acid. Essential fatty acid content was 26.57% of the total fatty acid. 3. The calcium, magnesium, potassium and sodium contents in dried alaska pollack showed 10.721 mg%, 9.235mg%, 4072.5mg% and 2299.8% respectively. The amount of magnesium and potassium in cooking broth arrived at the highest level when 20 minute boiling was undertaken and the quantities of magnesium and sodium were the highest when 30 minute boiling was made.

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The Effect of a Smoke-free Campus Policy on Receptivity of Campus and Government Smoke-free Policy among College Students (캠퍼스 금연정책이 대학생들의 캠퍼스 내·외 금연정책 수용성에 미치는 영향)

  • Shin, Sung-Rae;Kim, Yun-Hee
    • The Journal of the Korea Contents Association
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    • v.17 no.9
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    • pp.363-374
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    • 2017
  • This study was performed to evaluate the effect of a smoke-free campus policy on college students' receptivity of campus and governmental smoke free policy. The current study utilized pre and post cross-sectional survey in length of nine months. Data were collected from similar major freshmen at two pre matched universities, one representing smoke-free campus in Seoul city and one representing non smoke-free campus in Busan city, Korea. Baseline data were collected in March 2016 and follow-up data were collected in December 2016. No differences were found between initial and follow-up data on receptivity of smoke-free campus policy in both university students revealing that the smoke-free campus policy does not influence in changing student's attitude towards unfavorable direction. Receptivity on governmental smoke free policy demonstrated significant changes among participants in non smoke-free campus. Their receptivity level changed significantly toward unfavorable direction. The implementation of a smoke-free campus policy can give positive impact on students' receptivity of campus as well as governmental smoke free policy.

Nutritional Value of Cottonseeds and It's Derived Products : II. Free Gossypol, Available Lysine and In Vitro Protein Digestibility

  • Mujahid, A.;Abdullah, M.;Barque, A.R.;Gilani, A.H.
    • Asian-Australasian Journal of Animal Sciences
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    • v.13 no.3
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    • pp.356-359
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    • 2000
  • The study was conducted to evaluate the nutritional value of seeds and various seed fractions of different varieties of cotton (MNH 147, CIM 240, NIAB 78, FH 87, CIM 109, MNH 93, FH 682, GOHAR 87, SLS I and B 557). Linter, hull, kernel and meal were obtained from cottonseed by physical and chemical methods. Free gossypol and available lysine contents of seed and it's fractions were determined. In vitro protein digestibility of cottonseed meal was also determined. Free gossypol and available lysine contents ranged between 0.22-2.26% and 0.64-1.32% in seed, and 0.03-0.29% and 1.38-2.36% in meal, respectively. FH 87 was highest both in free gossypol and available lysine content, and NIAB 78 was lowest in free gossypol content and FH 862 was lowest in available lysine content. In vitro protein digestibility of cottonseed meal ranged between 66,02-79,96%. Statistical analysis revealed significant (p<0.05) varietal differences in free gossypol, available lyslne and in vitro protein digestibility of cottonseed and derived products.

A Study on the Contents of Tryptophan and Available Lysine in Korean Foods (수종한국상용식품중(數種韓國常用食品中)의 Tryptophan 및 Available lysine 함량(含量)에 대(對)하여)

  • Kim, Soong-Won;Lee, Sung-Dong
    • Journal of Nutrition and Health
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    • v.12 no.2
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    • pp.65-74
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    • 1979
  • In order to observe the contents of some essential amino acids in Korean foods, total and free tryptophan, and available lysine in fifty kinds of Korean foods were analyzed by the sfectrophotometry. The results obtained are summarized as follows : 1) The tryptophan contents per 100g of soybean, wet green laver and skim milk were over 250 mg, and the contents Per g nitrogen in ginger, dried persimmon and chestnut were over 150 mg. 2) The free tryptophan contents per 100 g of soybean, small red bean, dried persimmon, ginseng stem were over 100 mg, ana the contents per g nitrogen in dried persimmon was over 150 mg. 3) The available lysine contents Per 100g of soybean, wet green laver and skim milk, fish(auchovy), dried yeast, casein and silkworm pupa were over 1000 mg, and the contents per g nitrogen in potato, perilla(wild sesame), red pepper, sausage and skim milk were over 300mg. 4) The contents of tryptophan and available lysine in soybean, green laver and skim milk were higher than in other samples. 5) In general, the contents of tryptophan and available lysine were abundant in seaweeds.

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Effects of Cooking and Drying Methods on the Lipid Content and Neutral Lipid Composition of Shrimp (가열 및 건조방법이 새우의 지방질 함량과 중성지방질 조성에 미치는 영향)

  • Kim, Hyun-Ku;Hawer, Woo-Derck S.;Shin, Hyo-Sun
    • Korean Journal of Food Science and Technology
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    • v.21 no.1
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    • pp.17-24
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    • 1989
  • Effects of cooking and drying methods on the lipids content and neutral lipid component of shrimp, Metapenaeus joyneri, were investigated. Total lipid content of the fresh shrimp was 6.0%(dry basis), which was not changed significantly depending on the cooking and drying methods. Lipid of the fresh shrimp was composed of 36.8% of neutral lipids, 21.5% of glycolipids, and 41.7% of phospholipids. Freeze dried shrimp was substantially higher in neutral lipid contents but lower in glycolipid and phospholipid contents than hot air dried one. Main components of the neutral lipids were triglycerides, free sterols, free fatty acids and esterified sterols. Freeze dried shrimp contained higher triglycerides contents than hot air dried shrimp, whereas free fatty acids content in hot air dried shrimp was greater than that of freeze dried one due to the decomposition of triglycerides to free fatty acids during hot air drying. Major fatty acid composition of the total lipid were palmitoleic acid, eicosapentaenoic acid and docosahexaenoic acid, and that of neutral lipid were palmitic acid, palmitic acid, oleic acid, eicosapentaenoic acid and docosahexaenoic acid in fresh shrimp.

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Implementation of Barrier-free Content by using Virtual Reality and Geospatial Information (가상현실과 공간정보를 이용한 배리어 프리 콘텐츠 개발에 관한 연구)

  • Kim, Byeongsun;Jeon, Haechan
    • The Journal of the Korea Contents Association
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    • v.21 no.11
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    • pp.193-202
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    • 2021
  • Barrier-free is defined as inclusive design of built environments such as building and its facilities that can be approached, entered and used by persons with disabilities. The purpose of this paper develops the content that can identify the physical barriers in the way of movement and provide information associated with barrier-free by using both Geospatial Information and Virtual Reality technology. For this, we conducted literature reviews to find the tackling barriers in terms of barrier-free access and extracted main functions to construct the content. Then, the prototype model which composed of VR engine and 3D geospatial data was implemented, and finally the utilization of the prototype was checked in accordance with barrier-free scenario. The developed prototype model of this study would be contributed to design the barrier-free of public places and access to public buildings for the mobility-disabled people.