• 한국식품영양학회지
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• 제23권1호
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• pp.23-29
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• 2010

Pigment concentrates with violet-red color and sweet taste were obtained from purple-fleshed sweet potato(PFSP) using ethyl alcohol and water. Extract from general potato(GP) were used as a control. The relative stability of PFSP pigment concentrate(PFSPPC) in a storage test over 15 days was confirmed in the order of dark > fluorescence > sun-light irradiation. The relative stability of GP pigment concentrate(GPPC) in a storage test over 15 days was confirmed in the order of sun-light > fluorescence > dark storage. The RRP of PFSPPC was higher than that of GPPC, but the color strength of GPPC was 1/2 that of PFSPPC. Treatment of PFSPPC with aluminum potassium sulfate(0.2~0.3%, w/w) best improved its stability. The improved RRPs of PFSPPC were 45.16~47.31% in sun light irradiation, 55.91~60.22% in fluorescence irradiation, and 76.34~75.97% in dark storage conditions. In substituting aluminum potassium sulfate for chitosan, an amount of 0.2~0.3%(w/w) was suitable, giving similar results in improving pigment stability for all concentrates tested. Also, freeze-dried PFSPPC powder was manufactured as a substitute for dextrin, and also as a substitute for chitosan to the extent of 0.25%(w/w). The results of storage stabilite for freeze-dried PFSPPC and GPPC powder over 15 days, irradiation were, PRRs of 74.47~89.36% and 61.54~76.92%, respectively. The stability improving effect of freeze dried PFSPPC powder was confirmed by the results of storage experiments at various conditions. The use of freeze-dried PFSPPC powder was therefore confirmed to be an effective treatment for general foods.

• 약학회지
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• 제33권2호
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• pp.111-117
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• 1989

The optimum reaction conditions for the acid consuming capacity of aluminum silicate synthesized from the reaction of sodium silicate solution and potassium aluminum sulfate solution were investigated by Box-Wilson experimental design, and the micromeritic properties were examined by the means of BET $N_2$ adsorption, Hg penetrometer and methylen blue adsorption. The chemical composition of the samples were analyzed by gravitic method. The results were found to be as follows: optimum reaction temperature $54.7^{\circ}C$, both concentrations of reactant soln 15.7%, reactants molar ratio (Al/Si) 0.5 and drying temperature $65.0^{\circ}C$. The acid consuming capacity of the sample prepared by above optimum conditions was 68 ml and the chemical composition was $Al_2O_3{\cdot}3.6SiO_2{\cdot}3H_2O$. The relationship between acid consuming capacity and micromeritic properties could not found in the range of experiments. Therefore, it is assumed that the acid consuming mechanism of aluminum silicate depends on the neutralization of $Al_2O_3$ and buffer action of $SiO_2$ in sample.

• Journal of the Korean Wood Science and Technology
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• 제49권1호
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• pp.44-56
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• 2021

소방청의 방염성능기준에 제시된 45°멕켈 버어너법을 이용하여 물유리 농도와 첨가제 종류에 따른 합판의 탄화길이 및 면적 등의 방염성능을 측정하였다. 합판에 농도 20-50%의 물유리를 처리한 결과, 방염성능은 물유리의 농도와 비례하는 경향을 나타냈다. 그러나 30%를 넘는 고농도의 물유리로 처리된 합판의 표면에서 백화현상과 끈적임이 발생하여 농도 30%를 최적 조건으로 결정하였다. 농도 30%의 물유리에 서로 다른 비율의 첨가제를 추가하여 실험을 수행한 결과, 수산화칼륨 15% 조건과 수산화알루미늄 1-10%의 조건에서 방염성능 기준을 만족하였다. 반면에 황산마그네슘은 방염성능에 크게 영향을 미치지 않았다. 물유리와 첨가제에 따른 방염성능의 결과는 방염제를 활용한 불연재에 대한 기초자료로 활용될 것으로 기대된다.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2001년도 봄 학술발표회 논문집
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• pp.481-486
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• 2001

Ground granulated blast-furnace slag shows very high strength when proper alkali-activator exists. This paper deals with setting time, heat evolution rate and the strength development of alkali-activated slag cement activated by KOH, Ca(OH$)_{2}$, $Na_{2}$ $So_{4}$ , and alum(potassium aluminum sulfate). Alkali-activated slag mortar is studied by comparison with GGBF slag cement mortar. The experimental results indicate that for moisture curing at $25^{\circ}C$, the addiction of either 4% $Na_{2}$ $So_{4}$ or 4% alum increases the strength of GGBF slag cement mortar consisting of 50% GGBF slag and 50% portland cement at early age. Strength of activated GGBF slag cement mortars at 1, 3 and 7 days exceeded that of GGBF slag cement mortar. A conduction calorimeter was used to monitor early age hydration.

• 사물인터넷융복합논문지
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• 제6권4호
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• pp.33-38
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• 2020

2007년에 천연 염료 관련 자원, 색상, 염색 원단 등 천연 염색 정보를 쉽게 제공 할 수 있도록 모바일 어플리케이션을 설계 한 것으로 알려졌다. 천연 염색과 IoT의 연관성, 응용 등에 대한 연구가 아직 부족한만큼 다양성 천연 염색에 의한 염색 패턴 변화에 관한 정보가 필요하다. 본 연구에서는, 천연 염료, 예를 들어 Lithospermum erythrorhizon가 한국에서 전통적으로 많이 사용되어온 실크에 대하여 염색 정보를 구축하고자 했다. L. erythrorhizon에서 염료의 추출은 pH4에서 수행되었다. L. erythrorhizon의 건조 된 뿌리는 짙은 갈색을 띤 자주색을 보였다. 매염제가 없는 실크 직물은 일반적으로 보라색 염색 패턴을 보였다. 타르타르산 나트륨과 구연산으로 염색 한 실크 직물은 투명한 갈색으로 염색되었다. 흥미롭게도 황산 철 (II)의 매염제 인 실크 직물은 검은 색이 아닌 밝은 회색으로 염색되었다. 알루미늄 포타슘 설페이트의 매염제를 L. erythrorhizon 추출 염료로 처리 한 결과 매염제를 처리하지 않았을 때와 거의 동일했다. 염색도를 수치로 평가 한 결과, 중크롬산 칼륨의 매염제의 처리는 약 50% 어둡고, 황산 철 (II)에 의한 염색은 약 75% 어두웠다. 이러한 결과는 L. erythrorhizon을 이용한 다양한 염색 색 적용 연구에 도움이되며, 염색 정도와 pH 농도, 색도변화라는 염색변수에 의한 염색 컨트롤러와 데이터베이스 시스템 구축에관한 정보를 제공 할 것이다.

• 대한한방내과학회지
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• 제29권2호
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• pp.456-468
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• 2008

Objective : The purpose of this study was to investigate the effects of Gamisagunja-tang(GS) on the airway hyper-reactivity (AHR), cytokine production and T cell activation during the ovalbumin (OVA)-induced allergic asthma in mice. Materials and Methods : BALB/c mice were sensitized and challenged with 100 mg of OVA and 1 mg of aluminum potassium sulfate intraperitoneally on days 1 and 7. On day 14, mice were challenged on 3 consecutive days with 5% OVA. AHR and bronchoalveolar fluid (BALF), total inflammatory cell count and the production of cytokines were measured. Results : GS significantly suppressed the infiltration of inflammatory cells in the lung tissue and AHR. GS significantly down regulated the production of IL-4, IL-5 and increases of $INF-{\gamma}$ in BALF. GS reduced the population of eosinophils from lung and spleen in OVA-induced allergic asthma. GS reduced the population of $CD4^{+}$ $CD69^{+}$ $CD25^{-}$ T cells in OVA-induced allergic asthma Conclusion : These results suggest that GS may inhibit the production of IL-4, IL-5 and infiltration of eosinophils and be beneficial oriental medicine for allergic asthma.

• 한방안이비인후피부과학회지
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• 제20권3호
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• pp.107-117
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• 2007

Objective : Kumsoouyukkun-joen extract(KSE) has been used treating asthma for a long time in korea. In the present study, I examined the effects of KSE on the ovalbumin(OVA)-induced airway hyper-reactivity(AHR). Methods : To examine the effects of KSE on asthma, mice were sensitized with $100{\mu}g$ of OVA and 1 mg of aluminum potassium sulfate(Alum; Sigma)intraperitoneally on day 0 and 7. On day 14, mice were challenged on 3 consecutive days with 5% OVA and AHR was assessed 24 hrs after the last challenge. To examine severity of AHR, I examined eosinophil population and cytokine production in bronchoaveloar lavage fluid(BALF) and stained with hematoxylin and eosin in lung and also measured enhanced pause(Penh) in AHR from mice. Results and Conclusion : KSE potently inhibited the development of Penh and also reduced the number of eosinophil during OVA-induced AHR. KSE also inhibited cytokines production such as IL-4, IL-5 in BALF. Furthermore, KSE inhibited percentage of eosinophil in BALF. These results suggest that KSE may be beneficial oriental medicine for AHR.

• 한국의류학회지
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• 제28권3_4호
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• pp.444-451
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• 2004

This study was carried out to investigate the chemical and dyeing properties of Petasites japonicus leaf extract under the various extracting and dyeing conditions such as temperature, time, the ratio of water and pH, repetition of dyeing in silk and cotton fabrics with Petasites japonicus leaf. The results were as follows: 1. It was found that λ$_{\max}$ of color solution extracted by Petasites japonicus leaf has two peaks at 290nm and 323nm. 2. The optimum extracting conditions were studied at 10$0^{\circ}C$, 40min., pH 7 and 1 : 20(the ratio of water and Petasites japonicus leaf), the optimum dyeing temperature, dyeing time, dyeing pH and repetition of dyeing were 10$0^{\circ}C$, 60min., pH 7, repetitions of three times, respectively. 3. Silk and cotton fabrics dyed with Petasites japonicus leaf extract were colored yellowish orange. The colory Petasites japonicus leaf extract in silk and cotton fabrics were deeped by same-mordanting with aluminum potassium sufate and cupric sulfate. 4. Washing fastness of silk fabrics was 4∼5 grade, but cotton fabrics was 3∼4 grade, so washing fastness of silk fabrics washed with neutral detergent was excellent.

• 한국환경과학회지
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• 제19권8호
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• pp.931-940
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• 2010

The Raw water from Deer Creek (DC) reservoir and Little Cottonwood Creek (LCC) reservoir in the Utah, USA were collected for jar test experiments. This study examined the removal of arsenic and turbidity by means of coagulation and flocculation processes using of aluminum sulfate and ferric chloride as coagulants for 13 jar tests. The jar tests were performed to determine the optimal pH range, alum concentration, ferric chloride concentration and polymer concentration for arsenic and turbidity removal. The results showed that a comparison was made between alum and ferric chloride as coagulant. Removal efficiency of arsenic and turbidity for alum (16 mg/L) of up to 79.6% and 90.3% at pH 6.5 respectively were observed. Removal efficiency of arsenic and turbidity for ferric chloride (8 mg/L) of up to 59.5% at pH 8 and 90.6% at pH 8 respectively were observed. Optimum arsenic and turbidity removal for alum dosages were achieved with a 25 mg/L and 16 mg/L respectively. Optimum arsenic and turbidity removal for ferric chloride dosages were achieved with a 20 mg/Land 8 mg/L respectively. In terms of minimizing the arsenic and turbidity levels, the optimum pH ranges were 6.5 and 8for alum and ferric chloride respectively. When a dosage of 2 mg/L of potassium permanganate and 8 mg/L of ferric chloride were employed, potassium permanganate can improve arsenic removal, but not turbidity removal.

• 복식
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• 제49권
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• pp.49-63
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• 1999

This research utilized the Energy Dispersive X-ray Spectroscopy(EDS) and the Inductively Coupled Plasma Mass Spectrometry in the analysis of chemical elements present among the textiles exhumed from Kupori Hwasung-kun Kyunggi-do. The two research objectives were: first to examine the elements present and their percent presence in Kupori samples: second to investigate whether the elements are part of mordant substances which could have been used when dyeing the KUpori textiles in the past. To meet such research purposes standard silk fabric was dyed with Sophorajaponica using alum and iron mordants. For alum mordant unpurified general alum and potassium aluminum sulfate(AlK(SO4)2). iron sulfate(FeSO4·7H2O) were used, From the results of EDS and ICP-Mass analysis the following conclusions were drawn. 1 According to the EDS analysis 9 elements Ca, S, Al, Si, K, Fe, P, Mg and Na were detected. 2. ICP-Mass result of the mordant chemicas showed high amount of A, Al and k present in alum mordants and S and Fe present in iron mordants. 3. Comparison of the ICP-Mass results of the mordant chemicals and those of the standard dyed samples suggested that the amount presence of Al and Fe is a strong indication of the usage of alum and iron mordants respecticely in an unknown dyed textile. 4, In the washed Kupori textiles Fe showed a relatively higher rate of presence in the samples Therefore it can be conjectured that those Kupori textiles were dyed with iron mordant based on the result of the above number 3. 5. It is probable that the other elements detected from the Kupori samples were incorporated into the textiles as part of the soil debris produced from the degradation of the dead within the coffin or the earth debris. They can also be part of the inorganic compounds inherent in the silk textiles themselves before dyed. 6. Among the elements it is likely that Ca which showed a high degree of presence among the unwashed samples was part of the inorganic compound inferent in the silk textiles.