본 연구는 두부의 침지수에 AC를 처리하고 저장기간에 따른 품질의 변화를 측정하여 두부의 저장안정성을 조사하고자 수행하였다. 두부 침지액으로는 증류수, 0.05% AC 용액, 0.1% AC 용액 및 0.15% AC 용액을 사용하여 10oC에 저장하면서 pH와 탁도, 색도, 관능검사, 그리고 미생물의 변화를 관찰하였다. 침지액에 AC를 처리한 두부는 대조구와 비교해 보았을 때 pH가 높게 나타났고 저장기간이 늘어남에 따라 두부의 pH가 약간 감소하였다. 대조구에서 탁도는 두부의 저장기간이 늘어남에 따라 급격히 증가하였으나 AC를 첨가한 두부에서는 농도 의존적으로 탁도의 변화가 감소하는 경향을 보였다. 색도를 측정한 결과 AC를 처리한 두부에서 모든 군에서 차이를 나타내지 않았다. 두부의 관능검사에 있어서 저장기간 동안에 AC를 처리한 두부는 관능적 특성을 더 오래 유지하였으나 AC의 첨가율이 높을수록 색에 대한 기호도가 떨어지고 맛에도 영향을 미쳐 전체적 기호도를 저하시켰다. 두부의 씹힘성과 경도는 AC의 첨가율이 높을수록 낮아졌으나 이물감 조성에는 영향을 끼치지 않는 것으로 나타났다. Texture특성을 관능검사를 통해 측정한 결과 경도, 탄성, 검성, 씹힘성은 0.1% AC와 0.15% AC 용액을 침지액으로 사용하였을 때 대조구와 비교해서 낮은 수치를 나타내는 것을 볼 수 있었다. 두부의 저장기간 동안 호기성 세균수는 대조구에서 7일 후 6.00 log CFU/g을 초과하였으나 0.1% AC와 0.15% AC 처리 시에는 미생물의 증식이 효과적으로 억제되어 저장기간이 연장되는 결과를 보였다. 이와 같은 결과로 볼 때, AC의 침지처리는 10oC에서 7일 동안 가공두부의 선도유지 기간을 연장할 수 있는 효과를 기대할 수 있었다.

Highly Activated Calcium(below HAC) is the oxidized calcium made by dissolving shell materials with high voltage, about 15,000V, and high temperature(1,500~5,000). This HAC is a material with a very high degree of purity without toxicant. This HAC decreases chemical reaction so the degree of being active and dissolving living material is outstanding. The effects of HAC on the propagation of mushrooms are following. In the case of the Pleurotus ostreatus, when controlling media moisture by mixing with the HAC, mycelium cultivating days were shortened by 2days. The day required for primordial formation after inoculation(DPI) were one day faster, The number of stem was 15 and individual weight was 248g/850cc, a 6.5% increase. In the case of Pleurotus eryngii, when controlling media moisture by mixing with the highly activated calcium, mycelium cultivating days were shortened by 3days. DPI were 1 day faster, The day required for colonization after inoculation was shortened by 6days and individual weight was 108.8g/850cc, a 9.7% increase. In the case of Flammulina velutipes, the highly activated calcium was the best for scraping up mycelium. Mycelium incubating days were shortened by 2days. DPI were shortened by 3days. The day required for colonization after inoculation was 1day faster and the period of cultivation was shortened by 3days. Individual weight was 165g/850cc, a 6.7% increase. In the case of Lentinus edodes, when mixing medial with the highly cultivated calcium, cultivating days were shortened by 3days. The days for becoming brown in color were 2 days faster and the days of the first harvest were shortened by 4days. The weight of mushrooms was 169g/2kg, a 9.7% increase.

고활성칼슘은 패각류를 고온(1,500~5,000℃)에서 고전압(약 15,000V)의 전기를 통하여 전기분해해서 생산하는 산화칼슘이며, 제품의 순도가 대단히 높고 독성이 전무하며, 분자간의 결합력을 약화시켜 생체 내 활성도와 용해도가 탁월한 물질이다. 이의 버섯의 생육단계별 고활성칼슘처리효과는 다음과 같다. 느타리버섯은 배지 수분조절시 혼합할 때 균사배양일수가 2일 단축, 초발이 소요일수는 1일 빠르고, 유효발이경수가 15개, 개체중이 148g/850cc로 6.5% 증수되었다. 큰느타리버섯은 배지 수분조절시 혼합할 때 균사배양일수가 3일 단축, 초발이 소요일수는 1일 빠르고, 생육소요일수가 6일간 단축, 개체중이 108.1g/850cc로 9.7% 증수되었다. 팽이버섯은 균긁기 시 처리가 가장 좋았다. 균사배양일수가 2일 단축, 초발이 소요일수는 3일 빠르고, 생육기간은 1일 빠르며, 재배기간은 3일간 단축, 개체중이 165g/850cc로 6.7% 증수되었다. 표고는 배지 혼합시 배양일수가 3일, 갈변화 시작일이 2일, 첫수확 소요일수가 4일 단축되며, 수량은 169g/2kg으로 9.7% 증수되었다.

This paper reported the effect of blended activator on the compressive strength of alkali-activated slag cement(AASC) mortar. The alkalis combinations made using sodium hydroxide(NaOH), calcium hydroxide(Ca(OH)2) and potassium hydroxide(KOH) with calcium carbonate(CaCO3). The compressive strength was increase as the dosage of caustic alkali increase.

When ginseng seedlings are cultured in paddy fields, quality degradation and yield reduction are induced by severe plant loss with chlorosis on leaves occurred physiological disorder by excessive salt and poor drainage, rusty-root occurrence, and root rot etc. Accordingly, in order to solve these problems, this study was performed to investigate the treatment method, concentrations and time of activated ion calcium as environment-friendly agricultural materials. Activated ion calcium is an enriched and purified water-soluble mineral calcium component for absorbing quickly into plant as a highly functional calcium and it is an alkaline calcium of 37% (370 ml/1 l) concentration with pH 13. Treatment method was that ginseng seeds were sown after removing water in the shade after seed immersion for 1 minute with active ion calcium of 20-fold diluted solution, and then irrigated 4l per 3.3 m2 with 200-fold, 400-fold, and 600-fold diluted solution before emergence on late March, and supplied 1 time on leaves with 500-fold diluted solution in June and July respectively. The disease rate by treatment of activated ion calcium was that on the treatment of soil irrigated with 200-fold diluted solution compared to non-treated soil, damping-off was 33%, anthracnose was 100% reduced and the occurrence rate of rusty-root was 30% reduced. In addition, when active ion calcium of 200-fold diluted solution were soil irrigated, first and second grade ginseng were respectively 26% and 22% produced more, compared with control.