• 제목/요약/키워드: linseed oil

검색결과 80건 처리시간 0.022초

천연유지류 처리재의 발수성능 평가 (The evaluation of water repellent effectiveness of natural oil treated wood)

  • 이동흡;오형민;강창호;손동원;김종인
    • 임산에너지
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    • 제21권2호
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    • pp.34-42
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    • 2002
  • 천연물계의 유지를 목재에 처리하여 발수성능을 평가하였다. 시험에 사용한 유지는 아마인유, 피마자유, 올리브유, 콩기름, 들기름, 해바라기 씨 기름이다. 발수성 평가는 흡습성, 흡수성 시험과 접촉각 시험으로 하였다. 발수 처리한 목재를 빛과 수분에 의해 촉진열화 시킨 후에 열화정도를 색차계로 측정하였다. 촉진열화된 처리목재의 발수성능을 흡수성시험과 접촉각 시험을 통하여 비교 측정 하였다. 흡습성 시험결과, 흡습 초기에는 무처리에비하여 흡습량이 적으나 흡습처리 시간이 증가할수록 무처리의 흡습량에 가까워져 48시간 흡습처리 후에는 흡습비의 큰 차이는 없었다. 접촉각 시험의 결과, 처리재와 무처리재간의 결과가 큰 차이를 나타내었다. 유지의 농도와 종류에 따른 접촉각 변화는 흡습성 시험과 같이 큰 차이는 나타나지 않았다. 천연유지의 발수성능으로는 기상열화에 대한 안정성이 낮았다. 천연오일 단독처리만으로는 광열화에 대한 안정성을 기대하기 어려웠다.

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Alteration of the Fatty Acid Profile of Pork by Dietary Manipulation

  • Morel, P.C.H.;McIntosh, J.C.;Janz, J.A.M.
    • Asian-Australasian Journal of Animal Sciences
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    • 제19권3호
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    • pp.431-437
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    • 2006
  • This work was undertaken to study the effect of dietary fat source on the fatty acid profile of pork, and to evaluate the effect of inclusion of vitamin E in pig diets on lipid oxidation of pork tissue and processed pork products. Fifty-six pigs were allocated to four treatments, that included two dietary fat sources and two levels of vitamin E inclusion. Dietary fat was derived from either tallow, a source of saturated fatty acids (SFA), or from a mixture of soybean and linseed oils, which contain polyunsaturated fatty acids (PUFA). Vitamin E was included at either 0% or 0.011% of the diet. Growth and carcass characteristics were not affected by the dietary treatments. Dietary fat source affected the fatty acid profile of the longissimus muscle and subcutaneous fat tissue, with the PUFA diet resulting in significantly more polyunsaturated fatty acids in the tissues, and more favourable ratios of SFA to PUFA and C18:2 to C18:3 in terms of human health considerations. Lipid oxidation was significantly greater in tissues and processed products from PUFA-fed pigs. Inclusion of vitamin E in the diets, however, reduced the extent of lipid oxidation in the meat and meat products. Dietary manipulation of the fatty acid profile of pigs is an effective means of altering the fat composition of pork in order to provide human consumers with a healthy product. Vitamin E is effective as an antioxidant agent, particularly where processed products are concerned.

사료 지질원이 메기 Silurus asotus의 성장 및 체조성에 미치는 영향 (Effects of Dietary Lipid Sources on the Growth and Body Composition of the far Eastern Catfish, Silurus asotus)

  • 김경덕;김진도;임상구;강용진;손맹현
    • 한국수산과학회지
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    • 제43권5호
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    • pp.445-450
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    • 2010
  • This study investigated the effects of dietary lipid sources on growth performance and body composition of juvenile far eastern catfish, Silurus asotus. Three replicate groups of fish (average weight 3.6 g) were fed with one of the following experimental diets containing 10% beef tallow (BT), 5% BT plus 5% corn oil (CO), 5% BT plus 5% linseed oil (LO), or 5% BT plus 5% squid liver oil (SO) as the lipid source for 5 weeks. No significant difference was observed in the survival among groups. The weight gain of fish fed the LO (high in 18:3n-3) and SO (high in n-3 highly unsaturated fatty acid) diets was significantly higher than that of the fish fed the CO (high in 18:2n-6) and BT diets (P<0.05). The feed efficiency of fish fed LO and SO diets was significantly higher than that of the fish fed the BT diet (P<0.05), but not significantly different from that of the fish fed the CO diet. The protein efficiency ratio of fish fed the SO diet was significantly higher than that of fish fed the CO and BT diets (P<0.05), but not significantly different from that of fish fed the LO diet. The 18:1n-9 of whole-body polar lipid fraction in fish fed the BT diet increased compared to that of fish fed the other diets. Fish fed the CO and LO diets had significantly higher contents of 18:2n-6 and 20:4n-6, and 18:3n-3, than the fish fed the other diets in polar and non-polar lipid fractions, respectively (P<0.05). Significantly higher contents of 20:5n-3 and 22:6n-3 were observed in the whole-body polar lipid fraction of fish fed the SO diet compared with fish fed the other diets (P<0.05). The study results indicate that linseed oil and squid liver oil containing n-3 fatty acids are good dietary lipid sources for the growth of far eastern catfish.

Influences of Dietary Lipid Source on the Growth and Fatty Acid Composition of Juvenile Sea Cucumber Apostichopus japonicus

  • Seo, Joo-Young;Choi, Jin;Lee, Sang-Min
    • Fisheries and Aquatic Sciences
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    • 제13권2호
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    • pp.127-132
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    • 2010
  • A study was conducted to investigate the effects of dietary lipid sources on the growth and fatty acid composition of juvenile sea cucumber. For 12 weeks, three replicate groups of sea cucumber (average weight 1.4 g) were fed one of three diets, containing squid liver oil (SLO), soybean oil (SO), or linseed oil (LO) as a dietary lipid source, or a control diet (CON) without added lipids. Sea cucumber survival was not significantly different among dietary treatments (P>0.05). The highest weight gain was observed in sea cucumber fed the SLO diet, whereas the weight gain of sea cucumber fed the SO diet was the lowest among dietary treatments (P<0.05). No significant differences were found in the moisture, crude protein, crude lipid, and ash contents of whole sea cucumber body among dietary treatments (P>0.05). Concentrations of 20:5n-3 and 22:6n-3 were significantly higher in sea cucumber fed the SLO diet than in those fed on the other diets. The highest 18:2n-6 and 18:3n-3 contents were observed in sea cucumber fed the SO and LO diets, respectively. The results of this study suggest that squid liver oil could be used as a good lipid source in formulated diets for juvenile sea cucumber.

Effect of Different Vegetable Oils on Growth and Fatty Acid Profile of Rohu (Labeo rohita, Hamilton); Evaluation of a Return Fish Oil Diet to Restore Human Cardio-protective Fatty Acids

  • Karanth, Santhosh;Sharma, Prakash;Pal, Asim K.;Venkateshwarlu, G.
    • Asian-Australasian Journal of Animal Sciences
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    • 제22권4호
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    • pp.565-575
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    • 2009
  • Two experiments in the sequential order were conducted to determine the effects of different dietary lipid sources on the growth and fatty acid composition of rohu (Labeo rohita) and to examine the viability of a return fish oil finisher diet in restoring the human cardio-protective fatty acid profile. In the first experiment, fish were fed either with coconut oil (D1), olive oil (D2), sunflower oil (D3), linseed oil (D4) and fish oil (D5) as the main lipid source in the isonitrogenous diet for 90 days. No significant differences in growth were observed. Among the experimental diets moisture content of fish varied significantly (p<0.05) between the groups. Dietary lipid sources had a profound influence on the fatty acid profile of the muscle and liver as tissue fatty acid profile reflected the dietary fatty acid composition. Increased amounts of eicosapentaenoic acid and docosahexaenoic acid were observed in tissue of fish fed D4 and arachidonic acid was observed in the tissue of fish fed D3. We have also detected the metabolites of n-3 and n-6 pathway in D4 and D3 groups respectively, which prompted us to conclude that rohu, can desaturate and elongate $C_{18}$ essential fatty acids to $C_{20}$ and $C_{22}$ HUFA. A second feeding trial was conducted using the animals from the five different treatment groups for the duration of 30 days with fish oil rich diet (D5). Feeding with fish-oil rich washout diet resulted in the near equalization of all the other treatment groups tissue fatty acid profiles to that of fish oil (D5) fed group. These results indicate that a finishing fish oil diet can be effectively used to restore the human cardioprotective fatty acid profile in rohu fed with vegetable oils as lipid source.

들깨 품질평가 현황과 전망 (Current Status and Prospects of Quality Evaluation in Perilla)

  • 이봉호;류수노;곽태순
    • 한국작물학회지
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    • 제47권
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    • pp.150-162
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    • 2002
  • 1. 들깨는 용도면에서 볼 때 종실은 식용으로, 기름은 식용과 공업용, 깻잎은 채소로 또 깻잎의 정유성분은 향료로 이용될 수 있는 다용도 작물이다. 2. 종실의 단백질 함량은 18-28% 정도이고 단백질의 아미노산조성에 있어 글루타메이트(glutamate)함량은 계란보다 월등히 많다. 3. 종실의 기름 함량은 35~54%로서 기름중에는 리놀렌산(linolenic acid)이 60% 이상 함유되어 있으므로 생리적 기능성 식품으로 우수한 특성을 갖고 있으며 필수지방산의 공급원으로서도 중요하다. 4. 기름의 특성상 들기름은 고도의 불포화 지방산인 리놀렌산이 주성분이기 때문에 들기름을 짜서 상온에서 보관하게 되면 산패(oxidation)되기 쉬우므로 장기간 저장 이용하기 어렵다. 5. 깻잎은 비타민 C와 베타카로틴($\beta$-carotene) 함량이 많고 다른 미량성분도 풍부하게 함유되어 있으므로 들깨잎은 생식용 채소로서의 이용가치가 높다. 6. 깻잎의 정유(essential oil) 성분은 페릴라알데하이드(perilla aldehyde)가 주성분이며 이는 식품이나 식품첨가제로 쓰일 때 광범위한 항균작용(antimicrobial activity)을 나타낸다. 7 들깨나 자소잎의 붉은 색소중에는 안토시아닌(anthocynins)이 다량 함유되어 있으며 이는 식품색소로 널리 쓰인다.

목조문화재 보존을 위한 유지류 코팅제의 방수 성능 평가 (Water Resistance Evaluation of the Oils Coating for Conservation of Wooden Cultural Heritage)

  • 나원주;조소영;김도래;정우양
    • 보존과학회지
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    • 제31권1호
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    • pp.13-20
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    • 2015
  • 목조문화재는 수분의 영향으로 열화의 가속화가 진행되기 때문에 전통적으로 표면을 수분으로부터 차단하기 위해 들기름 및 동유와 같은 유지류를 도포하였다. 그러나 목조문화재에 적합한 유지류 코팅 방법 및 성능에 대한 체계적인 연구가 부족한 실정이다. 본 연구는 천연 유지류 3종과 오일스테인 2종의 목재의 방향별, 공시재의 시간 경과 및 유지류의 중탕 여부에 따른 방수 성능을 평가하여 현장 적용 가능성을 판단하였다. 건전 목재의 섬유방향에서 상온의 천연유지류 코팅제 방수성능은 대조군과 비교하여 약 79.2%를 차단하였으며, 특히 동유는 90.5%의 수분을 차단할 정도로 우수한 성능을 나타냈다. 2년간 실내에서 컨디셔닝을 실시한 경우 유지류의 방수 성능은 약 8.8% 감소하였다. 유지류를 중탕하여 사용할 경우 약 5.0%의 방수 성능이 향상되며, 특히 아마인유는 중탕하여 사용할 경우 약 9.6%의 방수 성능을 개선할 수 있다.

수용성 아크릴 변성 알키드수지의 합성과 물성 1.TMPTA그라프트 공중합에 의한 변성 (Synthesis and Characterisation of Acrylic-Modified Water-Reducible Alkyd Resin 1. Modification by TMPTA Graft Copolymerization)

  • 조영호;노시태
    • 공업화학
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    • 제4권4호
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    • pp.823-829
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    • 1993
  • Linseed oil fatty acid(LOFA), phthalic anhydride(PAA) 및 trimellitic anhydride(TMA), trimethylol propane(TMP)을 사용하여 기본적인 유장(oil length) 50%의 중유성 알키드를 합성하고 trimethylol propane triacrylate (TMPTA)를 그라프트 공중합시켜 수용성 TMPTA 변성 알키드수지를 제조하였다. 알키드수지의 산가는 TMA함량으로 제어하였으며, 수용화에는 N,N-Dimethylethanol amino(DMEA)를 중화제로 사용하였다. TMA함량에 따른 산가별 내수성 및 수용화의 최적조건을 산출한 후, TMPTA의 첨가량 변화에 의한 분자량, 유리전이온도, 수용화 후의 점성도, 그라프트율을 측정하였으며, 멜라민 수지를 사용하여 가교시킨 막의 경화온도별 겔분율변화를 조사하였다. TMA첨가량 5.3~7.0%, 산가 40~50의 범위에서 알키드 수지의 내수성과 수용화가 가장 좋은 균형을 나타냈으며, 변성 알키드수지의 경우 TMPTA의 양이 증가할수록 분자량, 수용액의 점성도, 겔분율은 증가하였으나, 유리전이온도(Tg)는 감소하였다. 고형분 함량에 따른 점성도 변화는 고형분 40%일 때보다 50%일 때가 점성도가 낮게 나타났으며 중화도에 따른 수용액의 점성도 변화는 중화도가 높을수록 점성도는 낮아지나 중화도 100~110 사이에서는 거의 변화가 없음을 알 수 있었다. TMPTA의 그라프트율은 TMPTA의 첨가량이 4wt%인 때가 가장 높게 나타남이 확인되었다.

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Effect of Feeding Ca-salts of Fatty Acids from Soybean Oil and Linseed Oil on c9,t11-CLA Production in Ruminal Fluid and Milk of Holstein Dairy Cows

  • Sultana, Halima;Ishida, Takeshi;Shintaku, Toshihiro;Kanda, Shuhei;Itabashi, Hisao
    • Asian-Australasian Journal of Animal Sciences
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    • 제21권9호
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    • pp.1262-1270
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    • 2008
  • The objective of this study was to investigate the effect of dietary supplementation with calcium salts of soybean oil fatty acids (CaSO) and linseed oil fatty acids (CaLO) on c9,t11-CLA production in ruminal fluid and milk fat from Holstein dairy cows. Rumen fermentation, lactational performances and fatty acid profiles in ruminal fluid and milk fat were also investigated. Twenty multiparous Holstein dairy cows were allotted randomly into two groups consisting of ten cows in each group according to calving date and average milk yield. The first group of cows was fed a control (without calcium salts) diet and a treatment as 1.0% of CaSO (on DM basis) for 30 days in each period. In the second group, cows were fed the same control diet and 1.0% of CaLO as a treatment in the same manner. The forage: concentrate ratio was 52:48, and diets were formulated to contain 17% crude protein (DM basis) for both groups. Ruminal pH, protozoal numbers and the concentration of total volatile fatty acids were unchanged, however, the ruminal ammonia-N decreased by feeding CaSO or CaLO treatment compared to the control diet. The vaccenic acid (trans-11 C18:1; VA) in rumen fluid increased (p<0.01) by 169% and 153%, and the c9,t11-CLA content of rumen fluid increased (p<0.01) by 214% and 210% in the CaSO and CaLO treatments, respectively, compared to the control diet. In milk fatty acids, the VA content increased by 130% and 132% in the evening and morning milking times, respectively, and the c9,t11-CLA content increased by 125% in both milking times for the CaSO supplementation than that of control diet. In the case of CaLO supplementation, the VA increased by 117% and 114%, and the c9,t11-CLA increased by 96% and 94% in the evening and morning milking times, respectively, compared to the control diet. The contents of VA and c9,t11-CLA of milk fatty acids were numerically higher in the evening milking time compared to the morning milking time for control and both treatments. Finally, these results indicated that the supplementation of CaSO or CaLO treatment increased the VA and the c9,t11-CLA in both ruminal fluid and milk fat of Holstein dairy cows.

수용성 아크릴 변성 알키드 수지의 합성과 물성 2. MA 및 TMPTA 공중합체에 의한 변성 (Synthesis and Characterization of Acrylic-Modified Water-Reducible Alkyd Resin 2. Modification by MA and TMPTA Graft Copolymerization)

  • 조영호;강기준;노시태
    • 공업화학
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    • 제5권4호
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    • pp.698-705
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    • 1994
  • Linseed oil fatty acid(LOFA), phthalic anhydride(PAA) 및 maleic anhydride(MA), trimethylol propane(TMP)을 사용하여 기본적인 유장(oil length) 50%의 중유성 기본 알키드를 합성하고 trimethylol propane triacrylate(TMPTA)를 그라프트 공중합시켜 MA/TMPTA 변성 알키드 수지를 제조하였다. 수지의 산가는 MA 첨가량으로 제어하였으며, 수용화에는 N,N-dimethylethanol amine(DMEA)를 사용하였다. TMPTA의 첨가량 변화에 의한 분자량, 유리 전이온도, 수용화 후의 점성도 및 그라프트율을 측정하였으며, 가교도막의 경화온도별 겔분율 변화를 조사하였다. 또한 멜라민 수지 경화 도막의 내열성, 내자외선성, 내수성 및 저장 안정성을 측정하고, TMA/TMPTA 변성 알키드 수지의 물성과 비교하였다. TMPTA의 첨가량이 증가할수록 수용화 후의 점성도, 겔분율, 그라프트율 및 분자량이 증가하였으며, 유리 전이온도(Tg)는 감소하였다. 고형분 함량에 따른 점성도 변화는 고형분 30%일 때보다 40%일 때가 더 낮게 나타났으며, 중화도에 따른 점성도 변화는 중화도가 높을수록 낮은 점성도를 나타내썼다. 내열성, 내자외선성, 내수성은 MA/TMPTA 변성 알키드 수지가 TMA/TMPTA 변성 알키드 수지보다 우수하였으나, 저장 안정성은 TMA/TMPTA 변성 알키드 수지가 우수함을 알 수 있었다.

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