• Membrane and Water Treatment
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• 제7권2호
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• pp.101-113
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• 2016

In this study, to improve the water flux of porous hydrophobic membranes, various water-soluble polymers including neutral, cationic and anionic polymers were adsorbed using 'salting-out' method. The adsorbed hydrophobic membrane surfaces were characterized mainly via the measurements of contact angles and scanning electron microscopy (SEM) images. To enhance the durability of the modified membranes, the water-soluble polymers such poly(vinyl alcohol) (PVA) were crosslinked with glutaraldehyde (GA) and found to be resistant for more than 2 months in vigorously stirred water. The water flux was much more increased when the ionic polymers used as the coating materials rather than the neutral polymer and in this case, about 70% of $0.31L/m^2{\cdot}h$ (LMH) to 0.50 LMH was increased when 300 mg/L of polyacrylamide (PAAm) was used as the coating agents. Among the cationic coating polymers such as poly(styrene sulfonic acid-co-maleic acid) (PSSA_MA), poly(acrylic acid-comaleic acid) (PAM) and poly(acrylic acid) (PAA), PSSA_MA was found to be the best in terms of contact angle and water flux. In the case of PSSA_MA, the water flux was enhanced about 80%. The low concentration of the coating solution was better to hydrophilize while the high concentration inclined to block the pores on the membrane surfaces. The best coating condition was found: (1) coating concentration 150 to 300 mg/L, (2) ionic strength 0.15, (3) coating time 20 min.

• 동국한의학연구소논문집
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• 제6권1호
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• pp.177-203
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• 1997

산욕기(産褥期) 감염(感染)이란 분만후(分娩後) 생식기(生殖器)의 세균(細菌)에 의한 감염(感染)을 의미(意味)하며, 산후(産後) 체온상승(體溫上昇)의 대부분(大部分)은 골반감염(骨盤感染)에 의한 것으로 산욕기(産褥期) 감염(感染)의 중요(重要)한 지표(指標)가 된다. 한의학에서 산후발열(産後發熱)의 병인병기(病因病機)는 주로 사독감염(邪毒感染), 혈어(血瘀), 외감(外感), 혈허(血虛) 등으로 보았으며, 치료는 일반적(一般的)으로 산후질환(産後疾患)에는 허증(虛證)이 많아 발표공리(發表攻裏)를 과도(過度)하게 하지 않고, 기혈(氣血)과 영위(營衛)의 조화(調和)에 위주로 하나, 외감(外感)과 이실증(裏實證)을 소홀(疏忽)히 하면 안된다. 따라서 산후발열(産後發熱)을 야기(惹起)하는 각종(各種) 원인균(原因菌)에 대(對)한 객관적(客觀的)인 억제효과(抑制效果)의 검증(檢證)은 산후발열(産後發熱)의 치료율(治療率)을 높이는데 중요하다. 그 결과 산욕기감염을 유발하는 각종(各種) 세균(細菌)에 대(對)해 황연(黃連), 오매(烏梅), 오미자(五味子) 등의 수용성(水溶性) 졸출물(拙出物)이 항균활성(抗菌活性)이 상대적(相對的)으로 좋은 효과(效果)를 보였다. 따라서 산욕기(産褥期) 감염(感染)의 치료(治療)에 이들 한약재(韓藥材)를 이용하면 보다 효과적(效果的)일 것으로 생각된다.

• 한국건축시공학회지
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• 제1권2호
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• pp.165-173
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• 2001

This study examinated the application in construction field and the development of waterproofing material system by the spray water-soluble rubber asphalt to solve the problems of synthetic polymer sheet and gio membrane(A mat sheet of Bentonite) that had been used domestic waterproofing material in advance. As the result of study, characters of study water-soluble rudder asphalt are the follows: 1) The amount of water absorption was '0.06'g and the seepage quality was '0'g in result. 2) The tensile strength was about 30.7kgf/$\textrm{cm}^2 and the elongation was about 72.4% in result. 3) After reliance of temperature test had been ended, the tensile strength was about 72.4kgf/$\textrm{cm}^2 in low temperature and about 30.7kgf/$\textrm{cm}^2 in normal temperature. 4) After acid and alkaline treatment had been ended, the tensile strength was about 19.7kgf/$\textrm{cm}^2$ and about 21.9kgf/$\textrm{cm}^2 in result. 5) After chlorine ion treatment had been ended, the tensile strength was 28.5kgf/$\textrm{cm}^2$ and the elongation was 250% in result. 6) The impact performance was subsided at 1.5m height. 7) After promotion weathering had been ended, the tensile and elongation was about 26.0kgf/$\textrm{cm}^2, 214% in result. So, this study can propose the spray water-soluble rubber asphalt to satisfy the and durability of waste filled land.

• 한국지역사회생활과학회지
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• 제16권1호
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• pp.59-64
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• 2005

This study is to find out effects of hot water soluble extract from green tea, one of the Korean favorites, on the calcium metabolism and bone strength in body. To do so, calcium, phosphate, creatinine concentration and ALP activity in blood and the content of calcium and ash in the organ, the length, weight, strength in bone were measured. In addition, to find the calcium metabolism, the level of calcium intake, excretion, retention were measured. Twenty male Sprague-Dawley rats were divided into two groups and isoloated soy protein was provided as the source of protein and CaCO₃ was provided as the source of calcium. 0.5% hot water soluble extract from green tea was provided to the green tea groups and for the control group deionized water was provided. The results are as follows ; 1. There is no difference between the experimental groups in diet intake, weight gain, and the feed intake. 2. Feed efficiency ratio was low in the group which hot water soluble extract from green tea was provided. 3. There is no difference between groups the level of calcium, phosphorus, creatinine and ALP activity in serum. 4. There is no difference between groups weight, contents of ash and calcium in kidney and liver. 5. There is no difference between groups in calcium intake, absorption, excretion, and retention. 6. There is no difference between groups weight, length and strength in bone. In summary, when hot water soluble extract from green tea was provided with the amount of 150-200mg, which is taken when people generally drink as favorite tea, weight gain was reduced due to the decrease of feed efficiency ratio. However, it did not affect the availability of calcium in body at all. Thus, even if a big quantity of green tea powder or solid of hot green tea extract is not provided, the quantity obtained when people drink green tea lowers the feed efficiency ratio without reducing availability of calcium in body.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.527-528
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• 2012

• Bulletin of the Korean Chemical Society
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• 제33권9호
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• pp.3087-3090
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• 2012

• 한국인쇄학회지
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• 제6권1호
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• pp.67-74
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• 1988

Absorption rates of oxygen in water soluble inks on the printing rollers were measured. As a results of experiments, could be obtained the data of rates of absorption of oxygen in 4 kinds of water soluble inks, and found the difference of absorption rate of oxygen on the parallel plates and rotating rolles.

• 대한약학회:학술대회논문집
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• 대한약학회 2001년도 Proceedings of International Convention of the Pharmaceutical Society of Korea
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• pp.295.3-296
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• 2001

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.655-656
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• 2011

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 1998년도 춘계학술대회 논문집
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• pp.467-470
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• 1998

The scientiic and technological aspects of water-soluble and water-swelling polymers to be synthesized from the domestic raw materials of Kazakhstan are described. The application area of polymeric reagents in medicine, biotechnology, agriculture, enhanced oil recovery, ecology is also considered.