• Bulletin of the Korean Chemical Society
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• 제35권8호
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• pp.2357-2360
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• 2014

Phosphorus-doped soft carbons were successfully prepared by carbonizing petroleum cokes treated with phosphorus acids, such as $H_3PO_2$, $H_3PO_3$, and $H_3PO_4$. The effect of the type of phosphorus acids used on the composition, structure, and electrochemical performance of the soft carbons was extensively investigated. The soft carbons modified with $H_3PO_3$ and $H_3PO_4$ exhibited dramatically improved reversible capacities and outstanding rate capabilities.

• 한국대기환경학회지
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• 제15권2호
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• pp.201-210
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• 1999

Cyclones have been extensively used in the industry for removing fine particles from the gaseous streams, based on simplicity in design and construction in association with low cost and flexibility to operate in extreme and harsh environments. However, industrial cyclones are typically not very efficient for particles smaller than 10μm. In this work, in order to improve the separation efficiency of reverse flow cyclones, a simple device named Post Cyclone(Poc) in installed on the top of an existing cyclone. Thereby the residual swirl present at the outlet (vortex finder) of a conventional cyclone has been used to capture the escaped dust from the cyclone in the PoC. The performance of PoC was closely evaluated by changing configuration of the PoC and operation condition. In addition, the dust behaviour in th PoC was investigated based on the hypothesis of residual vortex.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2015년도 춘계학술발표대회
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• pp.234-235
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• 2015

P2P 스트리밍 가능한 OSMU(One Source Multi Use) N-스크린 서비스를 제공하기 위해서는 Seamless 무선 통신이 반드시 요구된다. 본 논문에서는 Seamless N-스크린 서비스를 위한 무선 통신 MAC 구조로서, WiMedia Distributed-MAC 프로토콜을 적용하고, OSMU N-스크린 서비스를 제공하기 위해, 멀티캐스트 전송 기술을 제안하고 성능을 분석하였다.

• 한국초지조사료학회지
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• 제30권4호
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• pp.309-316
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• 2010

본 연구는 사료작물 재배지에 가축분뇨를 시용한 사료작물 재배지에서 초지식생대를 설치에 따른 $PO_4$-P와 토양 유실 저감 효과를 구명하기 위하여 수행되었다. 본 시험은 국립축산과학원 초지사료과 시험포장(천안)에서 경사가 약 10%에서 ${\pm}3%$인 자연 경사지를 이용하여 2007년부터 2009년까지 3년간 수행하였다. 가축분뇨 시용은 화학비료, 우분퇴비 및 돈분퇴비를 시용하였으며, 초지식생대의 길이는 5 m, 10 m 및 15 m의 길이로 설치하였다. 초지식생대 길이에 따른 유거수 중의 $PO_4$-P의 농도는 초지식생대의 길이가 길어질수록 줄어드는 경향을 보였다. 유거수 중의 평균 $PO_4$-P 농도는 초지식생대 0 m인 지점에 비해 초지식생대의 길이가 10 m 및 15 m 일 경우 $PO_4$-P의 농도가 유의적으로 감소하였으나(p<0.05), 초지식생대의 길이 10 m와 15 m 사이의 유실량의 유의적인 감소는 일어나지 않았다. 가축분뇨 시용에 따른 2008~2009년 평균 $PO_4$-P 농도는 화학비료 > 우분퇴비 > 돈분퇴비 순으로 높은 경향을 보였으나, 통계적인 유의성은 나타나지 않았다. 초지식생대 설치에 따른 2년 평균 토양 유실량은 길이가 5 m, 10 m, 15 m로 길어질수록 감소하였으며, 5 m 및 10 m에 비해 15m 지점에서 유의적인 토양 유실량 감소를 가져왔다(p < 0.05). 따라서 경사지에서 초지식생대의 설치는 가축분뇨를 시용한 사료작물 재배 시 강우로 유실되는 $PO_4$-P와 토양의 유실을 줄일 수 있을 것으로 사료된다.

• 미생물학회지
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• 제42권3호
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• pp.223-229
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• 2006

다기능성 농업용 미생물 제제를 개발하기 위하여 항진균능을 가진 불용성 인산 가용화 세균을 식물의 근권 토양으로부터 분리하였다. 분리균주의 분류학적 위치를 검토한 결과, Pseudomonas fluorescens RAF15로 동정되었다. P. fluorescens RAF15는 농작물의 잿빛곰팡이병균 Botrytis cinerea와 줄기썩음병균 Rhizoctonia solani의 생육을 억제할 수 있었다. 불용성 인산인 $Ca_3(PO_4){_2}$로부터 가용성 인산을 생성하기 위한 최적 배지 및 배양조건은 glucose 1.5%, urea 0.005%, $MgCl_2{\cdot}6H_2\;0.3%,\;MgSO_4{\cdot}7H_2O\;0.01%,\;CaCl_2{\cdot}2H_2O$ 0.01%, NaCl 0.05%, 배양온도 $30^{\circ}C$ 및 초기 pH 7.0이었으며, 최적조건에서 배양 5일 후 863 mg/L의 가용성 인산이 생성되었다. 불용성 인산 가용화는 유기산 생성에 의한 배양액의 pH 감소와 밀접한 관계가 있었다. P. fluorescens RAF15는 $10-35^{\circ}C$, 1-4% 염 농도 및 pH 2.0-11.0의 범위에서도 가용성 인산을 생성할 수 있었다. 본 균주는 $CaHPO_4,\;Ca_3(PO_4){_2}$ 및 hydroxyapatite에서 각각 971-1121 mg/L, 791-908 mg/L 및 844 mg/L의 가용성 인산을 생성하였다. 그러나 $FePO_2$ 및 $AlPO_4$의 경우, 생성된 가용성 인산의 농도는 각각 18 mg/L, 5 mg/L이었다.

• 한국세라믹학회지
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• 제32권12호
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• pp.1357-1368
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• 1995

Nasigels of composition Na0.75Zr2PSi2O12 and Na3Zr2PSi2O12 have been synthesized by the sol-gel technique using metal alkoxide precursors. The monolithic dry gels of Na0.75Zr2PSi2O12 with no crack have been prepared by the control of the shrinkage rte, but gels of Na3Zr2PSi2O12 were impossible to prepare without cracking. The gels treated up to 80$0^{\circ}C$ led to the formtion of glass but the glasses were converted to the crystalline phases at above this temperature. Crystaline phases precipitated from the Na0.75Zr2PSi2O12 glass were NASICON-like phase, Na2Si2O5, and free Zirconia. Phase that precipitated from the Na3Zr2PSi2O12 was only rhombohedral NASICON. For Na0.75Zr2PSi2O12 gels, framework of PO4 tetrahedra and SiO4(PO4) tetrahedra formed at low temperature but changed to that of SiO4 and SiO4(PO4) tetrahedras as it were crystallized. In the case of Na3Zr2PSi2O12 gel, framework of isolated PO4 and SiO4 tetrahedras formed at low temperature but changed to SiO4(PO4) tetrahedra framework which usually formed in the NASICON crystal after crystallization at high temperature. The gels treated up to 80$0^{\circ}C$ contained the residual water. The ionic conduction was attributed to the motion of proton and Na+ ion at low (up to 150~20$0^{\circ}C$) and high temperatures, respectively. As the temperature of heat treatment increased, ionic conductivity gradaully increased with the extent of precipitation of crystalline phase.

• 대한한방내과학회지
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• 제11권1호
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• pp.127-140
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• 1990

To evaluate effects of Pai Mo San (PMS) water extract on the plasma cortisol concentration and arterial blood $PCO_2,\;PO_2$ in the rabbit. The results obtained were as follows: 1. Intravenous administration of PMS water extract at the dose of 0.2 ml/kg remarkably increased plasma cortisol concentration from 1 to 2 hours. 2. Intravenous administration of PMS water extract at the dose of 0.4 ml/kg plasma cortisol concentration showed more significant increase than the control group after 1,2,4 hours. 3. No change observed in the arterial blood $PO_2$ after intravenous administration of PMS water extract at the dose of 0.2 ml/kg used. 4. No change observed in the arterial blood $PO_2$ after intravenous administration of PMS water extract at the dose of 0.4 ml/kg used. 5. Intravenous administration of PMS water extract at the dose of 0.2 ml/kg arterial blood $PCO_2$ showed more significant decreased than the control group after 1,3 hours. 6. Intravenous administration of PMS water extract at the dose of 0.4 ml/kg significantly decreased arterial blood $PCO_2$. These results suggest that the therapeutic action of Pai Mo San water extract for Yeol Su (熱嗽), Wha Su (火熱), Gu Su (久熱) and anti-asthma maybe related with the increase of plasma cortisol, decrease of $PCO_2$.

• Journal of Nutrition and Health
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• 제25권5호
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• pp.351-359
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• 1992

This study was conducted to compare the effects of perilla oil or corn oil on lipid peroxidation and eicosanoid productions which are associated with the promotion of carcinogenesis. in liver or blood in rats. Male Sprague-Dawley8 weaning rats were fed on semisynthetic diets containing 15%(w/w) beef fat(BF). corn oil(CO) or perilla oil(PO) Three weeks after the half of rats in each diet group were injected with a single dose of 50mg 2-acetylaminofluorene (AAF)/Kg BW hepatocarcinogen intraperitoneally 3 times at 2-day interval and all of the rats were sacrificed after 8 weeks from the first injection. The rats fed on different dietary fats without 2-AAF treatment had not different MDA produc-tion and conjugated diene content in liver microsome. CO+AAf group had significantly higher conjugated diene content than BF+AAF and PO+AAF groups. and lower glucose-6-phospha-tase activity than BF+AAF group But PO+AAF had similar conjugated diene content to BF+AAF group and significantly lower MDA production than BF+AAF and CO+AAF groups. The hepatic mocrosomal lipid peroxidation was slightly greater in CO group than in PO group though perilla oil(P/S=9.67) has much more polyunsaturated fatty acids than corn oil(P/S=2.92) PG E2 level in liver and TX B2 level in plasma were significantly higher in CO group than in BF and PO groups. TX B2 level was lowered in CO and BF groups by 2-AAF treatment. These results reach to the contclousion than the type of dietary fatty acid as well as the P/S ratio has effect on hepatic microsomal lipid peroxidation and eicosanoid production and perilla oil or linolenic acid(n3) might be less effective on lipid peroxidation or PG E2 and TX B2 mediated tumor promotion than corn oil or linoleic acid(n6).

• 한국식품위생안전성학회지
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• 제11권4호
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• pp.291-297
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• 1996

The role of cytochrome P-450 2E1 (P450 2E1) in the early phase of alcoholic fatty liver was examined. Female rats were pretreated with either allyl sulfide (200 mg/kg, po), disulfiram (500 mg/kg, po), YH 439 (250 mg/kg, po) or pyrazine (200 mg/kg/day$\times$2 days, ip). Marked changes in carbon tetrachloride-induced hepatotoxicity and caboxyhemoglobin (COHb) elevation due to dichloromethane administration were observed in rats treated with one of the P450 2E1 modulators. A single dose of ethanol (6 g/kg, po) increased the hepatic triglyceride contents approximately 2 fold, which was inhibited completely by YH 439 pretreatment. However, the other P450 2E1 modulators failed to alter the ethanol-induced hepatic triglyceride accumulation. In vitro hepatic microsomal enzyme activity was determined in 4 week old premature and 12 week old adult rats. Aminopyrine-N demethylation was not different, but p-nitrophenol hydroxylation and p-nitroanisole O-demethylation were significantly higher in premature rats. However, no difference in the triglyceride accumulation induced by an intraperitoneal dose of ethanol (3 g/kg) was noted between premature and adult rats. The results suggest that the P450 2E1 activity dose not play an important role in the induction of acute alcoholic fatty liver.

• 한국결정성장학회지
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• 제5권3호
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• pp.223-232
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• 1995

Urea($(NH_2)_2CO$) 및 THAMP(Tris(hydroxymethyl)aminomethane phosphate) 유기 단결정은 레이저의 파장변환소자등의 응용에 유용한 새로운 유기 비선형 광학재료(NLO)이다. 온도하강법과 온도차법을 이용하여 urea와 THAMP 유기 단결정의 육성을 시도하였으며 이들 방법에 따른 육성조건을 확립하였다. Urea의 용매로는 용해도의 측정을 통하여 메탄올이 가장 적합하였으며, 용해도에 대한 온도계수는 posotive였으며, 용해열은 - 2.58 kcal/mol이었다. 육성된 urea 결정은 z축의 성장이 지배적이었고, z축의 성장제어와 x, y축의 성장을 위하여 $NH_4_H_2PO_4$, KCL, $H_3PO_4$, $CaCl_2{\cdot}2H_2O$, $C_2H_5OH$의 첨가제를 사용하여 z축의 성장제어와 x, y축의 성장을 증진시켰다. THAM과 $H_3PO_4$의 화학 양론적 혼합비 1 : 1의 몰비로부터 양질의 THAMP 유기 단결정을 육성하였고 용해도에 대한 온도계수는 positive였으며, 용해열은 - 1.70 kcal/mol이었다.