• 한국식품영양학회지
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• 제36권5호
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• pp.354-359
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• 2023

A mono-type glycerine fatty acid ester compound was chemically synthesized using medium-chain fatty acids with antibacterial activity, and the physicochemical quality and antibacterial activity of the synthesized glycerine medium-chain fatty acid ester compound were measured. At a reaction molar ratio of MCT(medium chain triglyceride) to glycerine of 1:2.5, 48.15% mono ester was produced. The physicochemical analysis of the synthesized glycerine fatty acid ester compound showed an acid content of 0.38~0.60%, which tended to increase slightly as the glycerine molar ratio increased. The saponification value decreased as the synthesized molar ratio of glycerine increased from 218 to 284. The number of bacteria was measured to confirm the degree of antibacterial activity of glycerine medium-chain fatty acid esters against food poisoning bacteria, Bacillus cereus and Salmonella typhi. The number of bacteria significantly decreased as the MCT:glycerine molar ratio increased. In particular, the antibacterial effect between the treatment groups was the highest when at an MCT:glycerine molar ratio of 1:2.5.

• Biomolecules & Therapeutics
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• 제15권1호
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• pp.65-72
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• 2007

Flax seed(Linseed, Linum usitatissimum L.) and its oil, a richest source of alpha-linolenic acid(ALA)(${\omega}-3$), contain saturated fatty acids, neurotoxic cyanogen glycosides and immuno-suppressive cyclic-nonapeptides. Present paper describes the development of two chemical processes, Process-A and -B, to remove saturated fatty acids and to destroy cyclic nonapeptides and cyanogen glycosides from flax seed oil. Process-A consists of three major steps, i.e., extraction of fatty acid mixture by alkaline saponification, removal of saturated fatty acid by urea-complexation, and triglyceride reconstruction of unsaturated fatty acid via fatty acyl-chloride activation using oxalyl chloride. Process-B consists of preparation of fatty acid ethyl ester by transesterification, elimination of saturated fatty acid ester by urea-complexation, and reconstruction of triglyceride by interesterification with glycerol-triacetate (triacetin). The destruction of lipophilic cyclic nonapeptide during saponification or transesterification processes could be demonstrated indirectly by the disappearance of antibacterial activity of bacitracin, an analogous cyclic-decapeptide. The cyanogen glycosides were found only in the dregs after hexane extraction, but not in the flax seed oil. The reconstructed triglyceride of flax seed oil, obtained by these two different pathways after elimination of saturated fatty acid and toxic components, showed agreeable properties as edible oil in terms of taste, acid value, iodine and peroxide value, glycerine content, and antioxidant activity.

• 한국염색가공학회지
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• 제18권6호
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• pp.31-36
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• 2006

Study has been made for producing anionic surfactant using waste fleshing scraps from the leather making process through refining, esterification, sulfonation and blending processes. As a most optimum lard oil refining method, refining was carried out for 4 hours under temperature of $120^{\circ}C$ and approximately 200 mbar vacuum, which gave a recovery of more than 80% lard oil. Refined lard oil obtained thus was undergone methlyl-esterification, then sulfonated to make a degreasing agent. By methyl-esterification using lard oil, more than 85% of fatty acid and $12{\sim}13%$ of glycerine were extracted from the oil. Sulfonation of the extracted fatty acid ester lard oil has shown most optimum at $15{\sim}20%$ chlorosulfonic acid content, and the content of bonding sulfate at this time was higher than 3.5%. Finally the followed anionic surfactant having degreasing force of 80% and higher could be made by blending process.

• 한국응용과학기술학회지
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• 제32권2호
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• pp.348-361
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• 2015

오늘날 지구온난화를 줄이기 위한 노력으로 온실가스 저감 기술 개발에 대한 노력이 정부차원에서 이루어지고 있으며 그 일환으로 국내에서는 2006년부터 자동차용 경유에 바이오디젤이 혼입되고 있다. 비록 일부 품질 기준상의 개선사항이 남아 있고 대부분의 원료를 수입에 의존하고 있다는 점에서 제한요소가 있음에도 2013년 기준 년간 400kton를 생산하고 있으며 향후 신재생에너지 연료 혼합의무화 제도(RFS)가 시행되면 그 생산양은 더욱 증가할 것으로 예상되는바 원료 다변화를 통한 원료 불균형 해소와 이에 따른 적절한 연구 개발이 필요하다. 본 연구에서는 신규 바이오디젤 원료로 검토되고 있는 라우릭산 메틸에스터($C_{12:0}$ FAME) 중심의 팜핵유(PKO, Palm Kernel Oil)와 코코넛유 유래 바이오디젤을 대상으로 국내 품질기준 중 차량 연소계통과 저온성능에 문제를 일으킬 수 있는 글리세린 함량 분석과 관련하여 기존 시험방법(KS M 2412)의 적용 가능성을 조사하였다. 이를 바탕으로 기존 분석조건에서 발생되는 카프릭산 메틸에스터($C_{10:0}$ FAME)와의 피크겹침, 총글리세린 도출관련 계산평형상수 등에 대한 개선 사항을 도출하고 보다 다양한 원료를 이용한 바이오디젤 내 글리세린 분석 가능한 시험방법 개발 가능성을 검토하였다.