• 폴리머
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• 제34권3호
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• pp.198-201
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• 2010

탄소나노튜브의 응집력을 완화하기 위한 표면 개질과 고분자 소재와의 상용성을 유도하기 위하여, 친수성 고분자를 도입하는 연구를 진행하였다. 산처리를 통한 표면 기능화를 시행하였으며, 카복실기 도입 탄소나노튜브를 thionyl chloride을 사용하여 acyl chloride로 치환한 후 저분자량의 아민 말단 poly(ethylene oxide)를 공유결합으로 도입하였다. TGA를 통하여 탄소나노튜브 표면에 도입된 고분자의 함량을 계산하였으며, 탄소나노튜브 표면에 도입된 고분자의 표면 형상을 SEM과 TEM을 통하여 직경이 증가하는 것을 확인할 수 있었다.

• Asian-Australasian Journal of Animal Sciences
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• 제23권7호
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• pp.880-888
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• 2010

The ameliorative effect of salts and ascorbic acid polyphosphate supplementation on heat stress was studied in buffaloes. Adult buffaloes of either sex were randomly divided into 2 groups of 4 animals each. Group I served as control and Group II was supplemented with sodium bicarbonate, potassium carbonate and ascorbic acid polyphosphate. All the animals were exposed to two conditions of temperature and humidity: hot-dry and hot-humid in a psychrometric chamber for 4 h daily for 10 days. Blood was collected on day 1, 5 and 10 of treatment. The activities of catalase and superoxide dismutase (SOD), concentrations of serum glutathione (GSH), cortisol, sodium, potassium, and chloride and lipid peroxidation were estimated in serum. Lymphocyte proliferation was assessed in blood. The activities of catalase and SOD, serum concentration of GSH, sodium, potassium and chloride decreased while lipid peroxidation and serum cortisol increased in both groups when subjected to heat stress. Dietary supplementation resulted in further decreasing of the enzyme activities but increasing of the serum concentrations of GSH, sodium, potassium and chloride. Lipid peroxidation and serum cortisol increased in the supplemented group in both types of stress. Dietary supplementation caused an increase in lymphoproliferative response to con A. Thus, supplementation of ascorbate in addition to electrolytes relieves the animals of oxidative stress and boosts cell mediated immunity.

• 한국추진공학회:학술대회논문집
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• 한국추진공학회 2006년도 제26회 춘계학술대회논문집
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• pp.193-196
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• 2006

포화된 다중고리를 갖는 화합물의 endo-isomer 로부터 exe-isomer로의 이성화 반응에 대해 연구하였다. 강한 산점을 가지고 있다고 알려져 있는 제올라이트를 촉매로 사용하여 디시클로펜탄 계열의 endo-포화다중고리 화합물을 exe- 형태로 이성화 시켰다 제올라이트의 반응성은 제올라이트 세공의 크기와 제올라이트의 산점의 영향을 받음이 관찰되었다. 실리카와 알루미나의 비율이 낮아짐에 따라 반응성이 증가하였다. 염화알루미늄 촉매 반응의 경우가 제올라이트의 경우 보다 더 낮은 온도와 더 짧은 시간이 걸린다는 장점이 있었다. 그러나 환경적인 면과 취급의 용이성을 감안 할 때 제올라이트를 촉매로 사용할 수 있을 것이라 판단된다.

• 약학회지
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• 제3권1호
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• pp.23-25
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• 1957

The herb of Geranium sibirium L, a drug knwon as "Chui Sonni Poul" distributed widely, has been used as a folk-medicine for the treatment of diarrhea. The dried entire herb is boiled with methanol and methanol is distilled of from the filtered methanol extract under reduced pressure. Then the extract is boiled with water and filtered off. From the filtrate, the following substances are isolated and identified by treating with organic solvents as ether, ethyl acetate, and etc.: 1. Gallic acid: a colorless needle crystal which is soluble in alcohol and water. mp.235.deg. C, positive (dark blue) against the ferric chloride reagent. 0.76 percent of gallic acid is yielded from the herb. 2. Quercetin: a light yellow crystal. mp.194.deg. C. negative against the ferric chloride reagent. 3. Ellagic acid: a light yellow crystal which is insoluble in ehter and acetone and slightly soluble in alcohol. Positive (blue) against the ferric chloride reagent. The crystal obtained by recrystalisation from pyridine, does not melt by 360.deg. C. Represent a yield of 0.03 percent from the herb. 4. Crude tannin: a approximately 7.6 percent of crude tannin is yielded by treating with ethyl acetate. gallic acid and querceetin are yielded by hydrosis with dliute sulfuric acid. Based on the above results, the following suggestion could be recommendable; Geraed in the Japanese Pharmacoeia VI.acoeia VI.

• Pediatric Gastroenterology, Hepatology & Nutrition
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• 제19권3호
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• pp.207-209
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• 2016

Benzalkonium chloride (BAC) is a caustic agent which is used in farms, homes and hospitals for cleaning skin and wounds as an antiseptic solution. It may lead to digestive system injuries in case of ingestion. We present a two-days-old newborn case which was carried to the emergency unit with complaints of poor breastfeeding, uneasiness and crying for 4-6 hours. Her mom confessed that she had given a spoon of 10% BAC solution for her cough. Initial laboratory tests were in normal ranges. A gastroscopy performed in the second hour of her admission revealed an hyperemic and edematous mucosa in the middle third of esophagus and a circumferential ulceration followed in the distal portion. Hereupon, a conservative treatment for 10 days was administered and the control gastroscopy demonstrated that the damage was almost totally improved. She was the youngest case with this etiology and successfully treated with conservative approach.

• 대한한방내과학회지
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• 제27권2호
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• pp.459-470
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• 2006

Objectives: The aim of this experimental study is to investigate the effects of MYRISTICAE SEMEN, GRANATI PERICARPIUM and ALPINIAE KATSUMADAI SEMEN on the anticatharsis by using mice and Guinea pigs. Methods : We evaluated the effect of herbs on the extracted organs contraction, the barium sulfate transport, and the anticathartic action induced by acetylcholine chloride, barium chloride, histamine chloride, neostigmine, castor oil, pilocarpine in the ileums, large intestines, small intestines of animals. Results : In the extracted organs, all herbs showed concentration-dependent inhibitory effect on the constriction of extracted ileum. The transport of barium sulfate in the large and small intestine was increased in comparing with the control group. And every three herbs showed the anticathartic action. Conclusions : These results demonstrate that MYRISTICAE SEMEN, GRANATI PERICARPIUM and ALPINIAE KATSUMADAI SEMEN extracts have an advantageous effects on diarrhea induced by drugs and will contribute to the development of diarrhea treatment through further related studies.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2018년도 춘계학술발표회
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• pp.106-106
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• 2018

Cyanidin 3 - rutinoside chloride (CRC) is major anthocyanin, found in Schisandra chinensis, is known to have antioxidant, anticancer, anti-inflammatory, tonic, and anti-aging effects in Korea, China and Japan. In the present study, the human mast cell line (HMC-1) was used to investigate the effects on the production of pro-inflammatory mediators. In this study, CRC showed no cytotoxicity in HMC-1. CRC significantly inhibited the secretion of inflammatory cytokines such as tumor necrosis factor $(TNF)-{\alpha}$ and interleukin (IL)-6 in PMA plus A23187 cacium ionophore (PMACI)-stimulated HMC-1 cells. In addition, CRC suppressed the serum levels of IgE. Furthermore, CRC decreased the PMACI- stimulated phosphorylation of mitogen activated protein kinases (MAPKs) such as p-ERK, p- JNK and p-P38. These results indicate that the pharmacological actions of CRC suggest their potential activity for treatment of allergic inflammation through the down-regulation of mast cell activation.

• 한국결정학회지
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• 제8권2호
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• pp.81-88
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• 1997

GaN와 $NH_3$를 source gas로 사용하여 (0001) sapphire 기판에 CVPE(Chloride Vapor Epitaxy)방법으로 GaN 박막을 성장시킨후 그 특성을 조사하였다. 성장온도 $970^{\circ}C$ 부터 $1040^{\circ}C$ 영역에서 source gas의 유량비를 변화하면서 최적증착조건을 구현하였고, GaN증착이전에 $NH_3$ 가스로써 질화전처리를 하였다. 수행된 실험조건범위내에서 최적증착조건은 증착온도 $1040^{\circ}C$에서 질화전 처리 3분으로 III/V source gas의 유량비율이 2일 때 였으며, 이때의 XRD분석에서의 FWHM값은(0001) peak에서 약 0.32deg를 나타내었다. GaN박막성장속도는 이때 약 $1040^{\circ}C$였다.

• Archives of Pharmacal Research
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• 제29권8호
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• pp.645-650
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• 2006

Tributyltin chloride (TBTC) at concentrations of $0.5-1.0\;{\mu}M$ inhibits dopamine biosynthesis in PC12 cells. In this study, the effects of TBTC on L-3,4-dihydroxyphenylalanine (L-DOPA)-induced cytotoxicity in PC12 cells were investigated. TBTC at concentrations up to $1.0\;{\mu}M$ neither affected cell viability, nor induced apoptosis after 24 or 48 h in PC12 cells. However, TBTC at concentrations higher than $2.0\;{\mu}M$ caused cytotoxicity through an apoptotic process. In addition, exposure of PC12 cells to non-cytotoxic (0.5 and $1.0\;{\mu}M$) or cytotoxic $(2.0\;{\mu}M)$ concentrations of TBTC in combination with L-DOPA (20, 50 and $100\;{\mu}M$) resulted in a significant increase in cell loss and the percentage of apoptotic cells after 24 or 48 h compared with TBTC or L-DOPA alone. The enhancing effects of TBTC on L-DOPA-induced cytotoxicity were concentration- and treatment time-dependent. These data demonstrate that TBTC enhances L-DOPA-induced cytotoxicity in PC 12 cells.

• 한국환경보건학회지
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• 제31권2호
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• pp.165-171
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• 2005

A laboratory experiment was performed to investigate the nitrate removal from groundwater using Iron chloride(III) coated activated carbon (ICCAC). The breakthrough profiles of two ionic species, such as nitrate and sulfate showed that nitrate was selectively exchanged with chloride in ICCAC. The $FeCl_3$-coated activated carbon produced about 26 BV (Bed volume) of throughout when treating groundwater containing about $25\;mg/\iota\;of\;NO_3-N$. The regeneration of ICCAC with 1M KC1 was effective at a flow rate of 4 BV/hr. The ion exchange technology seems to be suitable technology for the treatment of small volumes of groundwater polluted by nitrate.