간호대학생의 정신간호학 실습이 요중 Na^(+), Cl^(-), K^(+), Ca^(++)에 미치는 영향

나현주,한유정 대한기초간호자연과학회 2001 Journal of korean biological nursing science Vol.3 No.2

This study was done to investigate the effect of the first experience of the clinical experience for psychiatric nursing on urinary Na^(+), Cl^(-), K^(+), Ca^(++) of the nursing students. We analyzed the urine of 36 students on curriculum who were students of D college in K city. The data were analyzed with SAS Statistical analysis was performed by using paired t-test, GLM. The second day group increased 18.56 at 8AM, 31.90 at 4PM in a case of Na^(+)(p=0.004). The second day group increased 27.61 at 8AM, 43.53 at 4PM in a case of Cl^(-)(p=0.009). The first day group increased 2.62 at 8AM, 7.09 at 4PM in a case of K^(+)(p=0.018). The second day group increased 3.69 at 8AM, 5.19 at 4PM in a case of K+(p=0.013). The second day group increased 20.65 at 8AM, 14.07 at 4PM in a case of Ca^(++)(p=0.033). There was a significant difference in Na^(+) according to group at 8AM(F=4.17, p=0.024) and 4PM(F=3.58, p=0.040). There was a significant difference in Cl^(-) according to group at 8AM(F=4.38, p=0.020) and 4PM(F=6.29, p=0.003). There was a significant difference in K^(+) according to group at 8AM(F=5.03, p=0.012). In conclusion, Na^(+), Cl^(-), K^(+), Ca^(++) may be used as a indicator of the amount of stress to improve the educational environment for the students.

Electrochemical properties of ultrafine Sb nanocrystals embedded in carbon microspheres for use as Na-ion battery anode materials

Ko, You Na,Kang, Yun Chan The Royal Society of Chemistry 2014 Chemical communications Vol.50 No.82

<P>Ultrafine Sb nanocrystals, uniformly distributed in a carbon matrix with a microspherical morphology, were synthesized by one-pot spray pyrolysis. The Sb–carbon composite microspheres exhibited good Na-storage properties with stable cyclability, a capacity retention of 90% over 100 cycles, and good rate performance.</P> <P>Graphic Abstract</P><P>The preparation of Sb–carbon composite microspheres and their electrochemical performance are investigated. Sb nanocrystals embedded in a microspherical carbon matrix exhibited superior Na-storage performances. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cc05275g'> </P>

Hollow Cobalt Selenide Microspheres: Synthesis and Application as Anode Materials for Na-Ion Batteries

Ko, You Na,Choi, Seung Ho,Kang, Yun Chan American Chemical Society 2016 ACS APPLIED MATERIALS & INTERFACES Vol.8 No.10

<P>The electrochemical properties of hollow cobalt oxide and cobalt selenide microspheres are studied for the first time as anode materials for Na-ion batteries. Hollow cobalt oxide microspheres prepared by one-pot spray pyrolysis are transformed into hollow cobalt selenide microspheres by a simple selenization process using hydrogen selenide gas. Ultrafine nanocrystals of Co3O4 microspheres are preserved in the cobalt selenide microspheres selenized at 300 degrees C. The initial discharge capacities for the Co3O4 and Cobalt selenide microspheres selenized at 300 and 400 degrees C are 727, 595, and 586 mA h g(-1), respectively, at a current density of 500 mA g(-1). The discharge capacities after 40 cycles for the same samples are 348, 467, and 251 mA h g(-1), respectively, and their capacity retentions measured from the second cycle onward are 66, 91, and 50%; respectively. The hollow cobalt selenide microspheres have better rate performances than the hollow cobalt oxide microspheres.</P>

Tb³⁺ and Ce³⁺ Intercalated Laponite Powder: The Influence of Ce³⁺ Ions on Thermal Stability and Optical Properties of Tb³⁺ Intercalated Laponite

Lee, Han-Na,Kim, You-Hyuk Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.4

Laponite samples intercalated with $Tb^{3+}$ or $Tb^{3+},Ce^{3+}$ ions were prepared by exchange of Na+ ions in interlayers with $Tb^{3+}$ or $Ce^{3+}$ ions. Strong green and weak blue emissions under vacuum ultraviolet (VUV) excitation (${\lambda}$ = 158 nm) were observed due to the $^5D_4{\rightarrow}^7F_J$ and $^5D_3{\rightarrow}^7F_J$ emission lines, respectively. $Tb^{3+}$ ions in an interlayer of laponite mainly existed in ion pairs or clusters, as evidenced by the concentration-dependent luminescence of the $Tb^{3+}$ ions on the relative intensities of the $^5D_3{\rightarrow}^7F_J$ and the $^5D_4{\rightarrow}^7F_J$ emission lines, due to the action of a cross-relaxation process. The addition of $Ce^{3+}$ ions increased the thermal stability of $Tb^{3+}$ intercalated laponite up to $650^{\circ}C$ and quenched the $^5D_3{\rightarrow}^7F_J$ emission lines, probably by promoting the formation of $Tb^{3+}$ ion pairs at relatively low $Tb^{3+}$ concentrations.

습식혼합에 의한 리튬망간 산화물의 합성과 리튬이온 제거특성

유해나(Hae-Na You),이동환(Dong-Hwan Lee),이민규(Min-Gyn Lee) 한국청정기술학회 2013 청정기술 Vol.19 No.4

본 연구에서는 탄산리튬과 탄산망간을 사용하여 습식혼합방법으로 스피넬 리튬망간 산화물(LMO)을 합성하였다. 합성한 리튬망간 산화물의 물리적인 특성은 X-선 회절 분석기(X-ray diffraction, XRD)와 주사전자현미경(scanning electron microscopy, SEM) 사용하여 분석하였다. 회분식 실험을 통해 LMO의 리튬이온에 대한 흡착특성을 살펴보았다. Langmuir 흡착 등온식으로부터 구한 리튬의 최대흡착량은 27.21 mg/g였다. LMO는 뛰어난 리튬 이온체의 특성을 가지고 있었으며, Ca<SUP>2+</SUP> < K<SUP>+</SUP> < Na<SUP>+</SUP><Mg2+ < Li<SUP>+</SUP> 순서로 분배계수(Kd)가 나타나 해수로부터 리튬을 회수하는데 용이할 것으로 사료된다. In this paper, the wet mixing method was introduced to prepare spinel lithium manganese oxide (LMO) with Li₂CO₃ and MnCO₃. The physical properties of the resulting lithium manganese oxide were characterized by the XRD and SEM. The adsorption properties of LMO for Li+ were investigated by batch methods. The maximum adsorption capacity of lithium was calculated from Langmuir isotherm and found to be 27.25 mg/g. The LMO are found to have a remarkable lithium ion-sieve property with distribution coefficients (Kd) in the order of Ca<SUP>2+</SUP> < K<SUP>+</SUP> < Na<SUP>+</SUP> < Mg<SUP>2+</SUP> < Li<SUP>+</SUP>, which is promising in the lithium extraction from seawater.

선천성 발진성 연모 낭종 1예

이나영,김지숙,최유원,황규광,함정희 대한피부과학회 2004 대한피부과학회지 Vol.42 No.3

An eruptive vellus hair cyst is an uncommon, benign, epithelial tumor with hair differentiation. Clinically, it presents as asymptomatic, flesh-colored to yellowish, follicular papules, 1 to 4 ㎜ in diameter, most commonly on the chest. It is usually sen in children and young adults but may be congenital. Histologically, it shows a middermal cyst lined by squamous epithelium containing keratinous material and vellus hairs. It has a tendency to clear spontaneously but may be persistent. We report a case of congenital eruptive vellus hair cyst in an 11-year-old girl who presented multiple pinhead-sized brown to black papules on her anterior chest since birth. (Korean J Dermatol 2004;42(3):362~363)

Pseudomonas fluorescens의 Salicylate hydroxylase를 암호하는 유전자의 클로닝

정유선,민경희,이나리 숙명여자대학교 자연과학연구소 1997 자연과학논문집 Vol.- No.8

Pseudomonas fluorescens SME11로 부터 salicylate hydroxylase를 암호하는 nahG 유전자를 클로닝하기 위하여 NAH플라스미드를 주형으로 하여 PCR을 수행하였다. PCR방법으로 얻은 1.6kb DNA절편을 pT7Blue(R)벡터에 삽입시켜 재조합 플라스미드 pNY1을 제조하였으며 이것을 E. coli에 형질전환하였다. 재조합 DNA를 제한효소로 처리하여 EcoRⅤ, KpnⅠ, PvuⅡ, StuⅠ등이 존재함을 확인하였으며, 이것으로 간단한 제한효소지도를 작성하였고 재조합 DNA를 한 방향으로 deletion하여, nahG유전자를 포함한 DNA절편의 염기서열을 결정하였다. 재조합 플라스미드인 pNY1에는 1,305bp크기의 open reading frame이 존재하였으며, salicylate hydroxylase에 해당하는 434개의 아미노산을 암호하였다. 아미노산서열을 비교한 결과, P.putida KF715와 84.1%, P.putida PpG7과 71.4%, P.putida S-1 과 48.7%의 homology를 보였으며, 또한 Sphingmonas sp.와 26.8%의 homology를 보였다. Pseudomonas fluorescens SME11 carrying NAH plasmid was isolated from wastewater. To clone nahG gene encoding salicylate hydroxylase, 1.6kb DNA fragment of PCR product from NAH plasmid was inserted to pT7Blue(R) vertor and resulting recombinant DNA was named pNY1. The transformants, E.coli SMY1, clone containing the recombinant plasmid pNY1 were able to convert salicylate to catechol and produced dark brown color caused by accumulation and auto-oxidation of catechol. Restriction endonuclease mapping of 1.6kb size of the insert of the recombinant plasmid pNY1 was carried out with EcoRⅤ, KpnⅠ, PvuⅡ, StuⅠ. By means of unidirectional ExoⅢ deletion and dideoxynucleotide chain termination, we determined the nucleotide sequence of the DNA fragment containing nahG gene. One open reading frame of 1,305 bp corresponding to 434 amino acids was found in the insert DNA. Deduced amino acid sequences of the nahG gene showed 84.1%, 71.4%, 48.7%, and 26.8% homologies to those from P.putida KF715, P. putida PpG7, P. putida S-1, and Sphingmonas sp., respectively.

免疫組織化學的 方法에 依한 마우스組織에서의 Toxoplasma 抗原 檢出에 關한 硏究

趙裕行,李英河,羅榮彦,辛大煥 충남대학교 의과대학 지역사회의학연구소 1990 충남의대잡지 Vol.17 No.1

This study was performed to identify the Toxoplasma antigens from the mice tissue chronically infected with Toxoplasma gondii Beverley strain by peroxidase-antiperoxidase(PAP) method. The 21 mice divided into two groups, control group (3mice) and cortisone-treated group (18mice). In cortisone-treated group, the mice were injected with 0.5mg of cortisone acetate twice a week for 6 week subcutaneously and 3 mice were sacrified at each week. The brain, lung, heart, liver, spleen, kidney, small intestine and skeletal muscle of mice were removed immediately after death. The removed tissues were fixed with 10% buffered neutral formalin, and then PAP method and H-E staining were done. The results were obtained as follows: 1. The cysts were found in the brain entirely, in the heart at 4 weeks, and in the skeletal muscle at 5 weeks. The number and size of cysts in the brain were increased in proportion to total dose of cortisone acetate in mice. Tachyzoites of Toxoplasma gondii showed at 4, 5 and 6 week in brain. 2. The brain, speen and skeletal muscle showed highly positive immunoreactivity. The liver, heart and small intestine were moderately positive, but lung and kidney showed weekly positive immunoreactivity by PAP method. 3. There were a chronic inflammatory responses in the brain, liver and heart but the remaining organs were almost normal appearance. And tachyzoites were found in the brain, associated with severe inflammatory changes. The present study revealed that tachyzoites and immunoreactivity of Toxoplasma were easily detected by PAP immune complex method.

만성 신장 질환인 2마리의 개에 있어서 외인성 크레아티닌 청소율 검사에 의한 사구체 여과율 측정 예

강지훈, 강건아, 김유정, 나기정, 양만표 충북대학교 동물의학연구소 2006 Journal of Biomedical and Translational Research Vol.7 No.1

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유해화학물질의 계통분석

박성우,박유신,이진훈,유재훈,김유나,오세진,이진숙,김남이,박종신,남금문,노동석 內務部 國立科學搜査硏究所 2002 國立 科學 搜査 硏究所 年報 Vol.34 No.-