• 제목/요약/키워드: acid salt

검색결과 1,662건 처리시간 0.044초

대체염을 이용한 저염 김치의 보존성 연장을 위한 보존제와 열처리 효과 (Effect of Preservatives and Heat Treatment on the Storage of Low-salt Kimchi)

  • 한영숙;오지영;김영진
    • 한국식품과학회지
    • /
    • 제34권4호
    • /
    • pp.565-569
    • /
    • 2002
  • 식염 대체염 SR-10으로 제조한 저염 김치의 보존성 연장을 위한 일환으로 저염 김치에 alcohol과 adipic acid를 첨가제로 사용하였으며, 첨가제와 함께 배추 절임 단계에서 절임액의 온도를 $40^{\circ}C,\;60^{\circ}C$로 조정하여 저염 김치의 보존성 연장 효과를 검토하였다. 첨가제는 alcohol 2.0% 처리군과 adipic acid 0.1% 처리군, alcohol과 adipic acid 혼합 처리군으로 분류하였다. 첨가제를 처리한 저염 김치는 대조군에 비해 발효지연 효과를 보였으며 첨가제별 효과는 alcohol 단독 첨가시 보다 adipic acid 단독 첨가시가 효과가 더 좋았고 혼합 처리시는 그 효과가 더 상승됨을 보였다. 첨가제별 처리효과가 크게 차이가 없었기 때문에 기호도면에서 대조군과 유사한 결과를 보인 adipic acid를 열수 절임 저염 김치에 적용하였다. 열수 절임시 $40^{\circ}C$ 열처리 보다 $60^{\circ}C$ 열처리한 경우 저염 김치의 발효지연 효과가 더 큰 것으로 나타났다. 기호도면에서는 $40^{\circ}C$ 열처리시가 $60^{\circ}C$ 열처리한 저염 김치에 비해 대조군과 유사한 특성을 보였다.

유기산에 의한 인듐스크랩에서 고순도 인듐옥살산염의 제조 (Preparation of High-purity Indium Oxalate Salt from Indium Scrap by Organic Acids)

  • 구수진;주창식
    • Korean Chemical Engineering Research
    • /
    • 제51권6호
    • /
    • pp.661-665
    • /
    • 2013
  • ITO glass 제조공정에서 발생되는 인듐스크랩으로부터 인듐옥살산염의 제조에서 유기산의 영향을 연구하였다. 유기산의 종류, 농도 그리고 반응액의 pH, 온도, 시간 등을 변화시키면서 인듐옥살산염 제조에 미치는 영향을 조사하였다. 불순물 제거 효율은 구연산 및 옥살산 모두 비슷하였으나 구연산은 인듐과 유기산염을 형성하지 못하였다. 인듐옥살산염 제조의 최적 조건은 옥살산 농도 1.5M, pH 7, 반응온도 $80^{\circ}C$, 반응시간 6시간이었다. 한편, pH가 증가하면 회수율은 증가하지만, 순도는 감소하였다. 2회 반복으로 제조된 인듐옥살산염의 순도는 99.995% (4N5)를 나타내었다. 인듐옥살산염은 치환반응, 소성 등에 의해 인듐금속 및 인듐산화물 등으로 전환할 수 있다.

Quality Characteristics of Low-Salt Myungran Jeotkal Fermented by Vegetable-Origin Lactic Acid Bacteria and Salt from Deep Sea Water

  • Lee, Deuk-Sik
    • 한국식품영양학회지
    • /
    • 제29권2호
    • /
    • pp.237-245
    • /
    • 2016
  • In this study, the physicochemical and sensory characteristics of low-salt Myungran jeotkal (Alaskan pollock roe) were evaluated after fermentation at $4^{\circ}C$ and $20^{\circ}C$ with or without the addition of deep sea water, salt from deep sea water, and vegetable-origin lactic acid bacteria (Lactobacillus fermentum JS, LBF). When fermented at $20^{\circ}C$, the addition of LBF to Myungran jeotkal resulted in a slow increase in lactic acid content, followed by an abrupt increase after five days of fermentation. However, when fermented at $4^{\circ}C$, the lactic acid content did not change significantly. Further, when Myungran jeotkal fermented at $4^{\circ}C$, the pH decreased as lactic acid production increased. The salinity of Myungran jeotkal fermented at $4^{\circ}C$ and $20^{\circ}C$ was 7% and was not affected by fermentation period. When fermented at $20^{\circ}C$, volatile basic nitrogen and amino nitrogen contents increased with increasing duration of fermentation. Further, volatile acid content decreased, however, the content of amino nitrogen increased after 11 days of fermentation with LBF and no salt effects were observed. When fermented at $20^{\circ}C$ for 13 days, preference (sensory evaluation) was the highest in all experimental groups after 9 days of fermentation, and then decreased as the fermentation period increased. The free amino acid content was highest (1,648.8 mg/100 g) in Myungran jeotkal when sun-dried salt and LBF were added, 2.3 times higher than in the control.

Phenol 류 및 유기산류와 Piperazine 류의 제조 (Preparation of Piperazine Salts with Some Phenols and Organic Carboxylic Acids)

  • 채동규
    • 약학회지
    • /
    • 제7권1호
    • /
    • pp.8-12
    • /
    • 1963
  • The piperazine salts with 24 kinds of phenols and 6 kinds of organic carboxylic acids were prepared. The test of anthelmintic effect against Ascaris suilla, in vitro, for Hexachlorophene-piperazine salt, Bithionol-piperazine salt, Kainic acid-piperazine salt were also carried out compared with piperazine, Hexachlorophene, Bithionol and Kainic acid.

  • PDF

천일염을 이용한 녹차의 발효가 Procyanidins와 Gallic acid 및 Theaflavins 추출량에 미치는 영향 (The influence of Procyanidins, Gallic acid and Theaflavins extracted level when fermented sun-dried salt and green tea)

  • 윤현;최철원
    • 한국산학기술학회논문지
    • /
    • 제15권6호
    • /
    • pp.3774-3780
    • /
    • 2014
  • 본 연구는 녹차에서 Procyanidins와 Gallic acid 및 Theaflavins의 추출을 높이기 위해 천일염을 첨가하여 발효시키는 방법에 대하여 실험하였다. 천일염의 포화도에 따른 추출량의 변화에서, 녹차만을 발효한 표본에서는 Gallic acid(0.004 mg/g)만이 추출되었고, Procyanidins와 Theaflavins는 추출되지 않았다. 천일염을 첨가하여 발효한 표본에서는 천일염의 포화도에 따라 Procyanidins는 75% 포화도(0.244 mg/g), 100% 포화도(0.949 mg/g), Gallic acid는 75% 포화도(0.386 mg/g), 100% 포화도(0.691 mg/g), Theaflavins는 75% 포화도(0.083 mg/g)에서 가장 많은 양이 추출되었다. 발효 일에 따른 추출량의 변화에서 Procyanidins는 발효 2일째(0.295 mg/g), Gallic acid는 발효 7일째(2,256 mg/g), Theaflavins는 발효 4일째(0.168 mg/g)에서 가장 많은 양이 추출되었다.

Reuse of Sodium Sulfate Recovered from Farm Drainage Salt as Dyeing Builder of Levelling Dyes - Analysis of Color Difference -

  • Jung, Jiyoon
    • The International Journal of Costume Culture
    • /
    • 제6권1호
    • /
    • pp.11-18
    • /
    • 2003
  • Agricultural drainage salt generated during irrigation of crops in San Joaquin Valley, California, exceeds 600,000 tons annually and cumulates in the field in a rapid rate. As a result, the waste is taking out more farmlands for salt storage and disposal, imposing serious concerns to environment and local agricultural industry. In searching for a potential solution to reduce or eliminate the waste, this research explored feasibility of producing a value-added product, sodium sulfate, from the waste and utilizing the product in textile dyeing. The results indicated that sodium sulfate could be produced from the salt and could be purified by a recrystallization method in a temperature range within the highest and lowest daily temperatures in summer in the valley. The recovered sodium sulfate samples, with purities ranging from 67% to 99.91, were compared with commercially available sodium sulfate in the dyeing of levelling dyes. In nylon fabrics, the salt samples had little color difference in the dyeing with C.I. Acid Yellow 23 and C.I. Acid Blue 158. All salt samples' gray scale was 5 grade. In wool fabrics, the salt samples had little color difference in dyeing with C.I. Acid Yellow 23 and C.I. Arid Blue 158. All salt samples' gray scale was 5 grade. Generally, the dyeing of levelling dyes using recovered salts from farm drainage had little color difference than the dyeing of levelling dyes using commercial sodium sulfate.

  • PDF

Inabenfide-Induced Alleviation of Salt Stress in Rice as Linked to Changes in Salicylic Acid Content and Catalase Activity

  • Sawada, Hiroko;Kim, Dea-Wook;Kobayashi, Katsuichiro;Shim, Ie-Sung
    • Journal of Crop Science and Biotechnology
    • /
    • 제10권1호
    • /
    • pp.39-44
    • /
    • 2007
  • The effect of inabenfide was investigated in rice seedlings subjected to salt stress in relation to changes in chlorophyll fluorescence(${\Delta}F/Fm'$), lipid peroxidation, salicylic acid(SA) content, and catalase(CAT) activity. A reduction in shoot growth of rice seedlings by 120 mM NaCl treatment was significantly alleviated by pretreatment with 30 ${\mu}M$ inabenfide. Sodium ion content was not affected by pretreatment with inabenfide, suggesting that alleviation was not due to a reduction in sodium ion uptake by the rice seedlings. At three days after NaCl treatment, the rice seedlings pretreated with inabenfide showed a higher ${\Delta}F/Fm'$(30%) and lower lipid peroxidation(28%) compared with the rice seedlings treated with NaCl alone. After NaCl treatment, CAT activity in the third leaf of rice seedlings decreased significantly but alleviated by pretreatment with inabenfide. Furthermore, pretreatment with inabenfide also reduced the level of SA which accumulated drastically in the third leaf of rice seedlings within a day after exposure to salt stress. These results suggest that inabenfide prevents SA accumulation in rice seedlings under salt stress which eventually induces the alleviation of salt stress damage.

  • PDF

반응표면 분석법을 이용한 마늘 열풍건조 공정의 최적화 (Development of Optimum Processing Conditions in Air Dried Garlics Using Response Surface Methodology)

  • 김명환;김병용
    • 한국식품영양과학회지
    • /
    • 제19권3호
    • /
    • pp.234-238
    • /
    • 1990
  • The effects of salt concentration immersion time in a salt solution prior to air dehydration and heating of air temperature during dehydration upon the browning reaction and pyruvic acid content of air dried garlics to a 6.5% moisture content(wet basis) were analyzed by a response surface methodology(RSM), Those values were also predicted by using a second degree polynomial regression model. Heating of air temperature was the most significant factor affecting the both browning reaction and pyruvic acid content. Salt concentration had more influence to browning reaction than immersion time whereas immersion time was more impor-tant factor than salt concentration on a retention of pyruvic acid sugested different processing conditions. While the processing conditions to minimize the browning reaction(O.D=0.009) were 0.3% of salt solution 9 min of immersion time and 5$0^{\circ}C$ of air temperature compared to control(O.D=0.022) of air dehydration at 5$0^{\circ}C$ Pyruvic acid contents were maximized(174 $\mu$mole/g garlic solid) at the 0.1% of salt solution 3 min of immersion time and 5$0^{\circ}C$ of air temperature compared to control(147 $\mu$mole/g garlic solid) of air dehydration at 5$0^{\circ}C$

  • PDF

LB법을 이용한 polyimide 초박막의 제작 (Fabrication of Ultrathin Polyimide Films by LB Technique)

  • 김재환;유덕선;김영관;손병청;강도열
    • 대한전기학회:학술대회논문집
    • /
    • 대한전기학회 1993년도 정기총회 및 추계학술대회 논문집 학회본부
    • /
    • pp.174-177
    • /
    • 1993
  • The polyimide films were prepared by imidizing the polyamic acid long-chain alkylamine (dimethylhexadecylamine) salt films with a thermal and chemical treatment, where the polyamic acid alkylamine salt film were formed on various substrates by using Langmuir-Blodgett (LB) method. The imidization of polyamic acid alkylamine salt films with various thickness were identified with FT-IR and UV-visible absorption spectroscopies. Atomic Force Microscopy (AFM) have been used to investigate the surface morpology of polyamic acid alkylamine salt and imidized films.

  • PDF

Dichloroisocyanuric Acid Sodium Salt에 의한 p-Nitrophenyl Diphenyl Phosphate의 가수분해 반응 (Hydrolysis of p-N itrophenyldiphenylphosphate by Dichloroisocyanuric Acid Sodium Salt)

  • 이용한;박훈;최귀남;장성일;김태흥
    • 공업화학
    • /
    • 제5권1호
    • /
    • pp.114-120
    • /
    • 1994
  • DCI (dichlorolsocyanuric acid sodium salt)에 의한 PNPDPP (p-nitrophenyldiphenylphosphate)의 미셀 내에서의 분해 반응을 pH 8.0 borate 완충용액에서 속도론적으로 살펴보았다. 양이온성 계면활성제인 CTAC (cetyltrimethylammonium chloride) 또는 CTAB (cetyltrimethylammonium bromide)를 첨가하면 반응은 빠르게 촉진되었으며, 특히 CTAB의 경우는 DCI의 N-Cl 결합이 N-Br 결합으로 전환되어 반응이 진행되었다.

  • PDF