• The Science & Technology
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• v.16 no.9 s.172
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• pp.20-23
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• 1983

- 홍콩에 전자도로 통행료 - CMOS 마이크로프로세서 곧 시판 - 제5세대 컴퓨터 능력 - 전자간수 탄생 - 야구 커브를 이용한 신형 비행선 - 새로운 지문채취기

• Polymer(Korea)
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• v.26 no.1
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• pp.121-127
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• 2002

We investigated uranium adsorption and adsorption process characteristics in brine water, changing column bed height packed with amidoximated polypropylene-g- acrylonitrile (AOPP-g-AN) fibrous ion-exchanger. Swelling ratios of AOPP-g-AN in fibrous ion-exchanger were 8.54g/g $H_2O_2$ and 8.87 g/g for $H_2O_2$ solvent respectively. Ion exchange capacity increased with degree of graft and showed the maximum, 3.99 meq/g at 100% degree of graft. In batch process, uranium adsorption had reached an initial equilibrium in 10 min with the adsorption rate of 9.5 mg/min. Finial adsorption capacity was 3.95 meq/g, and pH effect could not be observed. In continuous process, adsorption capacity depended on various packing ratios and showed the maximum, 3.92 meq/g at L/D=1. In L/D<2, breakthrough curve was shown two step by channeling flow and ununiform adsorption. Breakthrough time and adsorption capacity were 26 min and 3.63 meq/g, respectively, in brine water adsorption. When compared with actual brine water and model solution, there was no significant difference of adsorption characteristics.

• Journal of Korean Society of Environmental Engineers
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• v.22 no.4
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• pp.599-607
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• 2000

In this research, ${NH_4}^+-N$ and ${PO_4}^{3-}-P$ in wastewater were removed by crystallization. Nitrogen and phosphate have been regarded as key nutrients in the eutrophication of rivers and lakes. Struvite, $MgNH_4PO_4{\cdot}6H_2O$, is insoluble in alkaline solutions. Fertilizer industry wastewater contains organic and nitrogen concentration of 330 mg/L and 550 mg/L, respectively. Nitrogen in this wastewater cannot be treated by conventional biological treatment without physicochemical pretreatment, because nitrogen concentration is relatively high compared to organic concentration. Magnesium ions used in this study were from bittern and commercial magnesium salts of $MgCl_2$ and $Mg(OH)_2$. Bittern obtained as a by-product of seasalt manufacture contains $8,000mg\;Ca^{2+}/L$ and $32,000mg\;Mg^{2+}/L$. Optimum initial pH was 10.5~11.0 and the reaction was complete or done in 2 min. Nitrogen removal efficiency using bittern, $MgCl_2 $ and $Mg(OH)_2$ (as source of $Mg^{2+}$) was 71 %, 81% and 83%. respectively. Phosphate removal efficiency was 99%, 98% and 93%, respectively. Therefore, bittern, $MgCl_2$ and $Mg(OH)_2$ can be efficiently used as $Mg^{2+}$ source for crystallization of nitrogen and phosphate. However, bittern is economically favorable $Mg^{2+}$ source for removing nitrogen and phosphate in wastewater.

• Journal of Navigation and Port Research
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• v.39 no.6
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• pp.523-528
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• 2015

In this study, we investigated the effects of sulfuric acid on the synthesis of calcium borate in the artificial boron-containing brine (bittern) saturated with calcium hydroxide. For the study, we attempted to synthesize calcium borate under various conditions such as reaction temperature, reaction time, and cooling temperature after heating, and then to examine the recovery and purity of the calcium borate according to the presence or absence of sulfuric acid at each condition. The XRD analysis confirmed that, regardless of the presence of sulfuric acid, the calcium borate ($Ca_2B_2O_5{\cdot}H_2O$) was synthesized, while, in the presence of sulfuric acid, the calcium sulfate ($CaSO_4{\cdot}0.5H_2O$) was produced as a by-product. In all the experiments performed by varying the reaction temperature and time, the recovery and purity of the calcium borate without sulfuric acid were observed higher than those with it. The results indicated that the addition of sulfuric acid increased the solubility of the calcium hydroxide, but the calcium sulfate produced as a by-product could decrease the recovery and purity of the calcium borate by preventing the synthesis. In this study, the artificial boron-containing brine (bittern) (500 mg-B/L) was saturated with calcium hydroxide in the absence of sulfuric acid, and then the solution was heated at $80-105^{\circ}C$ for less than 10 minutes to synthesize the calcium borate. The recovery and purity of calcium borate were measured as high as 80 % and 96 %, respectively.

• The Monthly Diabetes
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• s.220
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• pp.10-11
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• 2008

당뇨병은 혈액 내 포도당 농도가 증가되어, 여러 장기에 합병증을 초래하여 사망률과 이환율을 증가시키고 삶의 질을 저하시키는 만성 대사 질환이다. 당뇨병과 간기능의 효소 수치를 높이는 질환들인 비알코올성 간질환, B형 및 C형 간염, 알코올성 간질환 등은 종종 병존하는 것으로 알려지고 있으나, 원인 및 임상적 의의에 대한 연구는 많지 않다.

• Journal of Sasang Constitutional Medicine
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• v.4 no.1
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• pp.241-253
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• 1992

To observe the diuretic action in mice, the anti-inflammatory action by carrageenin method and the anti-pyretic action by yeast method in rats, the Bittern was administered. Diuretic effort of Bittern was studied by measuring the urine flow, sodium, potassium in urinary excretion. The results in this work were summarized as follows: 1. The Bittern showed significant diuretic action. 2. The Bittern showed significant anti-inflammatory effect. 3. The Bittern showed significant anti-pyretic effect. According to the above results, the Bittern seems to be applicable to the treatment of edema.

• Proceedings of the Korea Water Resources Association Conference
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• 2022.05a
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• pp.174-174
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• 2022

수질지수는 여러 수질 데이터 값을 수학적으로 결합하고 다 변수 특성을 줄여 수치 및 등급으로 나타낸 지표이다. 수질지수를 통해 수질을 평가하고 서로 다른 위치와 시간의 수역을 종합적으로 비교할 수 있으며 수자원관리에 있어 정책입안자, 의사결정자, 국민이 수질에 대해 일반적이고 쉽게 이해할 수 있다. 현재 환경부에서는 국내수질자동측정망 최근 12시간 데이터 값을 근거로 실시간수질지수 RTWQI(Real-Time Water Quality)값을 제공한다. 국내 호소에 설치된 수질 자동측정망은 총 8개소이며 매 시간 공통 항목인 수온, pH, DO, 전기전도도, TOC 5개, 선택항목인 탁도, Chl-a, TN, TP, 중금속, 생물감시항목 등 27개를 측정한다. RTWQI는 캐나다에서 2001년에 개발된 CCME WQI(Canadian Council of Ministers of the Environment Water Quality Index) 산출식을 기초하였으며 F1(기준치를 위반하는 수질항목의 개수/ 총 수질항목 개수), F2(기준치를 위반한 샘플들의 총 횟수/총 샘플횟수) F3(기준치를 위반한 정도) 3가지의 요소로 계산된다. 그러나RTWQI 산출식의 기초인 CCME WQI는 개발 이후 여러 문제점들은 개선되었으나 F1이 다른 F2, F3 보다 CCME WQI 점수의 기여도가 2배 이상 높은 문제점은 개선하지 못하였다. 본 연구에서는 수질자동측정망이 설치된 2012년 7월부터 2021년 12월 동안 매 시간 별 수질 데이터를 이용하였다. 또한 CCME WQI 문제점을 개선한 MWQI(Modification of Canadian water qaulity index)를 기초하여 실시간 수질지수를 재 산정하였다. 추가적으로 Pearson 상관관계 분석 및 추가 통계분석을 통해 환경부에서 제공하는 기존의 RTWQI, 개선된 실시간수질지수, 한국형 호소수질평가지수 LQI(Lake Water Quality Index)를 비교 및 평가하였다. 이러한 연구를 통해 정확성 높은 수질지수를 찾고 수자원 관리 정책 수립에 적극 활용 될 수 있을 것으로 사료된다.

• Journal of the Korean Chemical Society
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• v.9 no.1
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• pp.49-54
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• 1965

One of the difficult and time consuming problems in the production of magnesia from sea water is a settling rate of magnesium hydroxide. In this experiments, authors attempted to accelerate its settling rate by addition of various sedimenting agents as C.M.C., Separan and Starch, and sought for optimum calcination temperature for domestic dolomite, as alkali source, mole ratio of dolomite milk to bittern. It is observed through experiments that the small amounts of sedimenting agents, C.M.C., Separan, starch, 20 mg/l, 40 mg/l, 400mg/l, respectively increase the settling rate of magnesium hydroxide by 8 times or more. The following conditions resulted in good yield of magnesium hydroxide from sea water with relatively tolerable calcium oxide contaminated for the magnesium clinker. Calcinating temperature, $1,100{\sim}1,200^{\circ}C$, mole ratio of 10% dolomite milk to magnesium salts in sea water or bittern, 1. 2 : 1.

• Proceedings of the Culinary Society of Korean Academy Conference
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• 2002.04a
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• pp.42-78
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• 2002

ㆍ 제주전통두부 제조에 따른 지역별 원료대두의 전처리 공정은 \circled1 생두부 -> 수침 -> 맷돌분쇄, \circled2 생두부 -> 맷돌분쇄 -> 수침 그리고 \circled1과 \circled2를 병행한 방법이 있었다. ㆍ비지제거공정의 경우 비지를 제거하는 지역과 비지를 제거하지 않는 지역(성읍)이 있었으며, 비지분리를 위한 첨가제로 돼지기름(내도) 또는 돼지기름과 쌀겨를 혼합(선흘)한 경우가 있었으며, 비지분리 횟수는 지역에 따라 1~3회 정도의 차이가 있었다. ㆍ 가열공정 중 가열용기는 가마솥을 사용하였고, 누름방지제로는 대부분의 지역에서 돼지기름을 사용하였고 일부 지역에서는 들기름을 사용하였다. ㆍ 응고공정 중 응고제로 해안선 지역에서는 해수를 사용하였고, 중간산 지역에서는 소금물을 이용하였으며, 염전이 있는 지역에서는 간수를 사용하였다. ㆍ 성형시간은 60~720분이었으며, 냉각은 수냉이 아닌 방냉을 하였다. 제주 전통두부는 주로 잔치, 상례, 기제사, 명절 등 대소사에 사용하였으며 대부분 가열조리하지 않고 섭취하였다.

• Journal of Oriental Neuropsychiatry
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• v.11 no.2
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• pp.155-167
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• 2000

After We treated Beriberi disease belonging to the argument of interior-overheating-symptom of the Tae-Eum-In caused by liver's receiving heat due to Seven emotional excess with Constitutional prescription. we had a Significant effect on patient's Character and Beriberi disease. Therefore, if we add some Herbs to Constitutional prescription according to patient's Symptoms. we think we can maximize The Effect and Application of Constitutional prescription.Through this Clinical analysis. We think we need a Systematic study on applying This Principle to more Various diseases.