• 동아시아식생활학회지
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• 제26권5호
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• pp.457-465
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• 2016

Effects of soaking time on the physicochemical and structural characteristics of waxy rice flours and starches purified from flours using the alkaline steeping method were investigated. Korean cultivar Sinseonchal waxy rice was washed and soaked in tap water (1:2 w/w) and stored at room temperature for 15 days. On each day of soaking for 0, 1,2 3, 5, 10, and 15 days, pH of soaking water was measured and rice grains were dried, ground, and passed through 100 mesh sieve. The pH was reduced to 3.90 by day 5 and increased to 4.60 by day 15. The protein and ash contents, swelling powers and solubilities of flours and starches decreased with increasing soaking time. The water-binding capacities increased while trends were not similar to soaking time. The flour particle size distribution ranged from two to four peaks with increasing soaking times. Starch granule size decreased with increasing soaking time. The peak, trough, and final viscosities of flours and starches showed similar trends until 10 days and 15 days, respectively. The starches presented higher viscosities than the flours. The branch chain length distributions of amylopectin of starches showed an increaseed DP6~12 portion and decreased DP13~24 portion with increasing soaking time of waxy rice grains.

• 펄프종이기술
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• 제41권5호
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• pp.15-19
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• 2009

Ammonia soaking treatment was introduced for hemp woody core pretreatment to increase enzymatic saccharification of polysaccharides. Portions of the xylan, cellulose, and lignin were removed by aqueous ammonia soaking, which improved the enzymatic saccharification of cellulose and xylan. Following ammonia soaking, 37% ($50^{\circ}C$-6 day treatment) to 61% ($90^{\circ}C$-16 h treatment) of the cellulose was converted to glucose and 33% ($50^{\circ}C$-6 day treatment) to 48% ($90^{\circ}C$-16 h treatment) of the xylan to xylose. Cellulose responded better to enzymatic saccharification than did xylan after the ammonia soaking treatment. Aqueous ammonia soaking pretreatment was more effective than electron beam irradiation for increasing enzymatic saccharification of xylan and cellulose in hemp woody core.

• 한국식품과학회지
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• 제25권3호
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• pp.247-251
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• 1993

유과제조 공정중 팽화기작에 가장 큰 영향을 미치는 침지과정에서 찹쌀의 이화학적 성분변화를 조사하였다. 찹쌀의 침지중 조지방과 조반백질 함량의 변화는 침지 초기에 원료 찹쌀의 $30{\sim}50%$가 침지액 중으로 용출 제거되었으나 침지기간이 경과함에 따라 더 이상 용출 제거되지 않았다. 침지액의 pH는 침지기간이 경과함에 따라 최저 3.3까지 감소한 반면 침지액의 Brix는 최고 13.6까지 증가하였다. 침지액과 낱알의 물추출산도는 $20^{\circ}C$ 침지구에서는 각각 22.9와 3.4까지 증가하였으며 $30^{\circ}C$ 침지구에서는 각각 29.8과 4.0까지 증가하여 고온침지에서 현저한 유기산 발효가 일어남을 알 수 있다. 침지과정중 생성된 유리당은 Fructose, Glucose, Sucrose 및 Maltose가 검출되었으나 90% 이상이 Glucose의 형태로 존재하였고 침지기간이 경과함에 따라 2397.8mg%까지 증가하다가 서서히 감소하였으며, Sucrose는 침지 1일 이후부터는 검출되지 않았다. 침지과정 중 찹쌀의 아밀로그래프 점도특성을 살펴본 결과 침지에 의한 호화개시온도의 변화는 나타나지 않았으나 최고점도는 $20^{\circ}C$ 침지구에서는 침지 2일 후에 450BU까지 증가했다. 침지 3일째 60BU로 급격히 감소하였으며 이후 다시 증가하다 서서히 감소하는 독특한 점도 특성을 나타내었다. $30^{\circ}C$ 침지구에서는 침지 1일째에 650BU까지 급격한 점도상승을 나타내었으며 이후에도 $20^{\circ}C$ 침지구와 유사한 경향을 나타내었다.

• 한국식생활문화학회지
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• 제35권6호
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• pp.582-589
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• 2020

This study was carried out to determine the optimum temperature of the jicama pickle solution by evaluating physicochemical and sensory characteristics at various temperatures. The soaking solution of the jicama pickle was prepared at different temperatures (95, 75, 50, and 25℃). During storage, the titratable acidity, Brix, and the salinity of the jicama pickles increased, and these values increased with increasing temperature of the soaking solution. The higher the temperature of the soaking solution, the lower the L and b values. In all samples, the hardness increased rapidly until the 5th day of storage, and then gradually decreased. During storage, the jicama pickles showed a high tendency to harden at soaking solution temperatures of 75 and 95℃. Sensory evaluation indicated that the taste, flavor, crispness, and overall preference of the jicama pickle were higher at a soaking solution temperature of 75℃ and above. The higher the temperature of the soaking solution, the higher the acceptability. Based on these results, we conclude that soaking solution temperature of 75°¦95℃ in the manufacture of jicama pickles had a positive effect on the reduction in tissue softening and the sensory properties of the jicama pickle.

• 한국잠사곤충학회지
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• 제10권
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• pp.57-58
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• 1969

Artificial silkworm eggs must do washing the acid completely after soaking HCl. Author experimented following deacidification times: 30 minutes, 1 hour, 2 hours, 6 hours soaking and 12 hours soaking eggs in the fresh water after artificial hatching, and incubated room temperature. There was no difference 1 hour's with control but more than 1 hour deacidification influenced badly in hatching ratio. Especially above than 6 hours deacidification was not only delaying 1 day in hatching date but also decreasing in practical hatching ratio.

• 한국식품영양과학회지
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• 제39권2호
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• pp.281-286
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• 2010

검정콩을 현미식초에 절임한 초콩과 그 담금액의 담금기간에 따른 이화학적 특성 변화를 조사한 결과, 초콩 담금액에서 pH와 가용성 고형분 함량은 담금 4일째까지 급속히 증가한 반면, 총 산도는 감소하는 경향을 나타내었다. 담금액에서 침지 후 1일째에 색도 L값과 b값은 급격히 감소하였으나, a값은 1일째 크게 증가하였다가 담금기간 중 감소하였다. 초콩은 식초에 담금한 기간이 길어질수록 경도 및 강도가 감소하는 경향이었으며, 증류수에 침지한 검정콩(대조군)보다 경도 및 강도가 낮았다. 전기영동에서 담금기간 동안 초콩의 단백질은 대부분 분자량 24,000 Da 이하의 band만을 나타내어 저분자화 경향을 나타내었다. 식초에 7일간 담금한 초콩은 총 아미노산 함량이 86.86 mg%로 생콩의 28.36 mg%보다 약 3배 정도 증가하였고, 필수아미노산, 특히 leucine과 phenylalanine의 함량이 크게 증가하였다. 단백질에 대한 in vitro 소화율 또한 생콩에서 62%에 불과하였으나 식초에 7일간 담금한 초콩은 84%의 소화율을 나타내었다. 이러한 결과는 초콩이 아미노산의 우수한 공급원으로 활용될 수 있음을 제시하는 것으로 사료된다.

• 한국자원식물학회지
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• 제26권5호
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• pp.636-644
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• 2013

원료곡인 동부의 침종, 포화, 노화 조건이 동부나물 생산량과 생장반응에 미치는 영향을 검토한 결과, 흡수량은 침종 초기 2시간까지는 급속히 증가하다 이후에는 완만히 증가하였으나, 발아력과 나물 생산수율 및 잔뿌리 발생량은 침종기간(1~6시간)이 길어질수록 낮았다. 5일간 포화(수분 $96{\pm}1%$, $20^{\circ}C$)처리가 무처리나 1, 3일간 포화처리에 비해 발아력과 나물 생산수율 및 잔뿌리 발생량이 높았다. 고온 노화처리에 따른 발아력과 나물 생산수율은 무처리에 비해 낮았는데, 이상의 결과로 동부나물 재배를 위한 원료곡 전처리 방법은 5일간 포화(수분 $96{\pm}1%$, $20^{\circ}C$)처리하고 세척하여 재배하는 것이 좋은 것으로 판단된다.

• 한국식생활문화학회지
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• 제17권1호
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• pp.70-77
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• 2002

Jangachi(salted and fermented vegetable) has been made by Korean traditionally using several kinds of vegetables, which is a good source of variety of nutrients and vitamins. There are many methods for making Jangachi. Generally soy sauce Jangachi is made through two steps. First, as a pretreatment, vegetables are soaked in salt water. Second, soaked vegetables are fermented in various ingredients like soy sauce, sugar, garlic, ginger and so on. This study was performed to observe changes in contents of chemical components and sensory evaluation of pretreated perilla leaf. Perilla leaf was soaked in water with different levels of salt concentration(2, 5 and 8 %) and soaking time(1, 3 and 5 days). The optimal level of salt and soaking time was determined with the results of sensory evaluation by response surface methodology and analysis of composition. The moisture contents decreased as the levels of salt and soaking time increased. The moisture content of untreated sample was 87.5 % and when soaked for 5 days in the water of 8 % salt concentration, it became 78.27 %. pH of Perilla leaf was high in high levels of salt concentration and short soaking time. Total acidity was so opposite to pH that was low in high levels of salt concentration and short soaking time. In the water of 8 % salt concentration, total acidity was 0.14 % when soaked for 1 day, 0.20 % for 3 days and 0.30 % for 5 days. Salt contents became greater as the soaking time increased. As the results of puncture test, soaked Perilla leaf's toughness increased as the levels of salt increased and soaking time decreased. Among the sensory attributes, greenness increased as the levels of salt concentration increased when soaked for more than 3 days. Saltiness and bitterness became greater as the levels of salt concentration increased. Perilla flavor decreased with the short soaking time. Off-flavor increased with the increased levels of soaking time and decreased salt concentration when soaked for more than 3 days. Toughness decreased as the levels of soaking time increased. Crispness increased with the increased levels of salt concentration. The condition of pretreated Perilla was optimum when it soaked for 42 hours in 4 % salt concentration.

• 한국식품조리과학회지
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• 제5권1호
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• pp.31-41
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• 1989

The effects of salting degree of cabbage on the chemical, microbiological, textural changes and taste of Korean whole cabbage Kimchi fermented at $21^{\circ}C$ was studied. Low salted Kimchi (1.8% NaCl, soaking for 2 hr. in 20% brine) was showed higher total acdity than high salted Kimchi II(3.1% NaCl, Soaking For 8 hr in 20% brine) and III(2.9% NaCl, no soaking in 20% brine). The changes in growth of lactic acid bacteria was relevant to the salt content of whole cabbage Kimchi. Kimchi I was showed higher growth rate of Lactic acid bacteria and slower death rate constant of Lactic acid bacteria than that of Kimchi II and III. In palatability test, salty taste of Kimchi II, III was more salty than that of Kimchi I ($p{\leqq}0.01$) and total evaluation of Kimchi I, II was more palatable than Kimchi III ($p{\leqq}0.05$) at 3rd's day (optimum taste). Cutting force by Rheometer was well correlated with the salt content of Kimchi.

• 한국약용작물학회지
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• 제20권5호
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• pp.393-397
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• 2012

This study was investigated seed germination of Rheum undulatum L. depends on storage temperature (-20, $5^{\circ}C$ and room temperature), germination temperature (5, 15, 25 and $40^{\circ}C$) and a soaking treatment (no soaking, 2 days and 4 days). There was not much difference from the germination rate of R. undulatum L. in storage temperature conditions for 8 weeks. The highest of germination rate occurred over 80 percentage at $25^{\circ}C$. When R. undulatum L. was soaked with tap water for four days, the average values of germination velocity and germination day were represented of 1.7 ea/day and 1.68 days. These results may help our understanding of variations in germination characteristics for R. undulatum L. seeds treated under various germination conditions.