냉수처치가 흰쥐의 화상조직에 미치는 영향

마흥수,함기선,주상용,박경희,안용팔 大韓成形外科學會 1982 Archives of Plastic Surgery Vol.9 No.1

Lewis(1930) & Langohr (1949) suggested that cold water therapy (CWT) reduces tissue metabolism, oxygen debt and dilates minute vessels, therefore increasing blood flow, on the burned tissue in rats. So this method diminishes tissue damage due to impaired circulation and may retard the development of infection. These experiments were performed to study the effects of CWT on the burned tissue in rats. Full thickness scald burns(‘80c’10sec)were inflicted on the backs of the 42 rats. Burned rats were divided into 2 groups: 27 rate as an experimental group (immediate and delayed CWT) and 15 rats as an untreated control. The untreated control was sacrificed on the 1/2th, 1st, 8th, 24th and 72th hour after burn. Immediate CWT group was immersed immediately into the cold water (1-2℃, 10min) after burn and sacrificed as same as the time of untreated control. Delayed CWT group was burned and CWT was performed after 5 min, 10min and 30 min delay. They were sacrificed on the 24th hour after burn. The specimens taken from all experimental animals were fixed in 10% neutral formalin embedded in paraffin wax, sectioned at a thickness of 5um, and stained with hematoxylineosin for general histologic findings. Observation was made of morphological changes in the collagen fibers, capillaries and separations between collagen fibers located in the skin of rats. The results were as follows: 1. The tissue injury of immediate CWT group was less severe than untreated control. 2. The more CWT is delayed, the more tissue injury is aggravated. So immediate CWT is the most effective modality in the CWT of bumed tissue.

신제초제 Azimsulfuron 의 제초활성과 토양중 행동

마상용,전재철 한국환경농학회 1996 한국환경농학회지 Vol.15 No.4

Azimsulfuron [1H-pyrazole-5-sulfonamide,N-(((4,6-dimethoxy-pyridine-2-yl-aminocarbonyl-4-(2-methyl-2H-tetrazole-5-yl)] is a new sulfonamide herbicide that selectively controls a wide range of weeds in lowland rice (Oryza sativa). It effectively controlled Cyperus serotinus, Eleocharis kuroguwai, Sagittaria pygmaea, S. trifolia, and Scirpus juncoides at 7.5 - 30 g ai/㏊. In the tolerance test on grasses carried out in a nutrient solution containing 0.3 - 30 ppm of azimsulfuron, greater inhibition occurred in roots of both rice and barnyardgrass (Echinochloa crus galli) than in shoots. However, rice root was approximately 5-fold more tolerant than that of barnyardgrass. The downward movements as determined by 50% growth inhibition of S. juncoides were 4-㎝ in clay loam and 6.5-㎝ in sandy loam soil with 3-㎝/day leaching for 3 days. When incubated at 20 and 30℃, the residual effect in clay loam soil lasted for 30 and 21 days, respectively. In a soil column applied at 15 g ai/㏊ of azimsulfuron followed by 3-㎝/day leaching for 3 days, dry weights of S. trifolia emerging at 5, 10, and 15-㎝ depth were reduced to 87, 85, and 79% of the corresponding untreated control, respectively. Susceptibility of S. trifolia to azimsulfuron did not greatly vary with the emergence depth.

Onset of Magnetic Order in U2(Ni1−xFex)2Sn-H

S. Maˇskov´a,L. Havela,A. Kolomiets,K. Miliyanchuk,A. V. Andreev,H. Nakotte,J. Peterson,Y. Skourski,S. Yasin,S. Zherlitsyn,J. Wosnitza 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.10

We present specific heat and magnetic studies as a function of temperature and magnetic field for U2(Ni1−xFex)2Sn alloys (x = 0.0, 0.05, 0.1, 0.15, 0.2, 0.4, 0.6 and 0.8) and their hydrides (absorption of ≈ 2 H/f.u.). For the parent alloys, antiferromagnetic order is rapidly suppressed with increasing Fe concentration and non-Fermi-liquid behavior was found for x = 0.2. Hydrogenation of the parent alloys causes a substantial increase of TN in Fe-low hydrides (x < 0.2), while Fe-rich hydrides show an unexpected appearance of ferromagnetism in the range 0.4 ≤ x ≤ 0.8. Some of the findings are compared with similar studies in U2Co2Sn and U2Co2InH1.9.

Hydrogenation of monolayer molybdenum diselenide via hydrogen plasma treatment

Ma, K.,Yoon, S.,Jang, A. R.,Jeong, H.,Kim, Y. J.,Nayak, P.,Shin, H. Royal Society of Chemistry 2017 Journal of Materials Chemistry C Vol.5 No.43

<P>Functionalization of transition metal dichalcogenides has been studied with the aim of tuning their electrical and optical properties, but structural information during functionalization and its reversibility have not been elucidated. We report a simple and effective method for hydrogenation of monolayer MoSe2 using hydrogen plasma treatment. The covalent bonding of hydrogen to MoSe2 was confirmed by X-ray photoelectron spectroscopy, and the degree of hydrogenation was modulated from 32% to 80% by increasing the plasma treatment time from 5 to 40 s. Transmission electron microscopy confirmed a 1.5% reduction in the lattice constant of hydrogenated MoSe2 without structural damages or defects; crystal structures of hydrogenated MoSe2 and as-prepared MoSe2 were identical. Photoluminescence (PL) investigation of hydrogenated MoSe2 showed charge transfer from hydrogen to MoSe2. Furthermore, reversible desorption of hydrogen from hydrogenated MoSe2 was achieved by heat treatment. The optical and electrical properties of as-prepared and hydrogenated MoSe2 samples were compared. The PL peak of hydrogenated MoSe2 returned to the as-prepared one after heat treatment at 500 degrees C. Furthermore, the electron mobility of MoSe2 decreased from 29 to 9 cm(2) V-1 s(-1) after hydrogenation and was restored to 27 cm(2) V-1 s(-1) upon heat treatment at 500 degrees C. This reversible hydrogen adsorption and desorption lends control over the optical and electrical properties of monolayer MoSe2 and contributes to the hydrogen functionalization of monolayer transition metal dichalcogenides and other two-dimensional materials.</P>

초기성인의 생활습관과 당뇨에 대한 지식

소선이,마지은,고지윤,김은혜,박현화,서유진,서형은,유은미,이하늬,이혜인,정지연,현혜리,이자형,정덕유,강지숙 이화여자대학교 간호과학대학 2009 이화간호학회지 Vol.- No.43

Purposes :The purposes of this study was to investigate the self-managing status according to the life styles and the diabetic knowledge of early adulthood. The subjects in this study were 240people, the early adult aged twenties to thirties living in the metropolitan area. Data were collected by using self-administered questionnaires that measure about the knowledge of diabetes; the dietetic behavior; the knowledge of diet; the exercise behavior; the knowledge of exercise. Descriptive statistics, t-test, ANOVA, and correlation were used for data analysis. Result :1. At the knowledge of diabetes degree based on the general character, the subjects who had experiences of diabetic education have higher degree of the diabetic knowledge. 2. At the knowledge of diabetes degree according to the life style, the subjects who have regular diet are appeared highly. Also the subjects who don't take much food of animal origin have higher degree. 3. At the knowledge of diet based on the life style, the subjects who don't keep three times meals a day are appeared highly. Also the subjects who have regular diet have higher degree. 4. At the knowledge of exercise according to the life style, the subjects who take extra nutritions 3-4 times a week are appeared highly. Although the subjects tend to know about dietary, exercise and health management, it showed that they actually don't perform what they know in their everyday of life. The reason for this could be the lack of perceived seriousness about diabetes mellitus. Thus as nursing professionals, we should provide them proper health education and support. Moreover, advanced research on the empowerment is warranted.

NMR Solution Structure of HP0827 (O25501_HELPY) from Helicobacter pylori: Model of the Possible RNA-binding Site

Jang, S.-B.,Ma, C.,Lee, J.-Y.,Kim, J.-H.,Park, S. J.,Kwon, A.-R.,Lee, B.-J. Oxford University Press 2009 The Journal of biochemistry Vol.146 No.5

<P>The HP0827 protein is an 82-residue protein identified as a putative ss-DNA-binding protein 12RNP2 Precursor from Helicobacter pylori. Here, we have determined 3D structure of HP0827 using Nuclear Magnetic Resonance. It has a ferredoxin-like fold, beta1-alpha1-beta2-beta3-alpha2-beta4 (alpha; alpha-helix and beta; beta-sheet) and ribonucleoprotein (RNP) motifs which are thought to be important in RNA binding. By using structural homologues search and analyzing electrostatic potential of surface, we could compared HP0827 with other RNA-binding proteins (sex-lethal, T-cell restricted intracellular antigen-1, U1A) to predict RNA-binding sites of HP0827. We could predict that beta sheets of HP0827, especially beta1 and beta3, are primary region for RNA binding. Consequently, similar to other RNA-binding proteins, RNP motifs (Y5, F45, F47), positively charged and hydrophobic regions (K32, R37, K40, K41, K43, R70, R73) are proposed as a putative RNA-binding sites. In addition, differences in amino acids composition of RNP motifs, N, C-terminal residues, loop-region fold and the orientation of alpha1-helix with other RNA recognition motif proteins could give specific biological functions to HP0827. Finally, the study on natural RNA target is also important to completely understand the biological function of HP0827.</P>

Paricalcitol prevents cisplatin-induced renal injury by suppressing apoptosis and proliferation

Park, J.W.,Cho, J.W.,Joo, S.Y.,Kim, C.S.,Choi, J.S.,Bae, E.H.,Ma, S.K.,Kim, S.H.,Lee, J.,Kim, S.W. North-Holland ; Elsevier Science Ltd 2012 european journal of pharmacology Vol.683 No.1

The present study was performed to examine whether paricalcitol may prevent the cisplatin-induced kidney injury. Furthermore, potential molecular mechanisms underlying the protective effect of paricalcitol were explored. Male Sprague-Dawley rats were treated with vehicle (n=12), cisplatin (n=12, 6mg/kg/day, i.p.), or cisplatin+paricalcitol (n=12, 0.2μg/kg/day, s.c.) for 4days. In another series of experiment, HK-2 cells were treated with cisplatin (50μM), with or without paricalcitol (0.2ng/ml). Paricalcitol counteracted the cisplatin-induced decline in renal function. Paricalcitol also suppressed the expression of TGF-β1, Smad signaling, and the subsequent epithelial-to-mesenchymal process in cisplatin-treated rats. The expression of P-p53 and p21 was increased in cisplatin-induced nephropathy. These changes were completely prevented or significantly attenuated with paricalcitol co-treatment. The expression of p27<SUP>kip1</SUP> was increased in cisplatin-treated rats, which was, however, further augmented by the paricalcitol co-treatment. In HK-2 cells, cisplatin increased the expression of p-ERK½ and P-p38. Cisplatin also increased the expression of fibronectin and CTGF. Cisplatin increased the expression of pro-apoptotic markers. The expression of CDK2 and Cyclin E as well as that of PCNA was increased. These changes were completely prevented or significantly attenuated by the paricalcitol pretreatment. In contrast, cisplatin increased the expression of p27<SUP>kip1</SUP>, which was further augmented by the paricalcitol-pretreatment. These results suggest that paricalcitol may ameliorate cisplatin-induced renal injury by suppressing the fibrotic, apoptotic and proliferative factors. Its underlying mechanisms may include inhibition of TGF-β1, mitogen-activated protein kinase signaling, p53-induced apoptosis, and augmentation of p27<SUP>kip1</SUP>.

Zinc acetate를 precursor로 사용한 ZnO막의 제조 및 습도감지 특성

마대영,이수철,김상현,박기철,김기완 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

Anhydrous zinc acetate [Zn(CH_(3)COOH)_(3)] has been used as a novel precursor for the growth of ZnO in a conventional thermal evaporator. Zinc acetate was directly heated in the laboratory made brass boat. Zinc acetate was sublimed at the boat temperature of about 220℃. Oxygen has been flowed into the deposition chamber to change the partial pressure of oxygen. X-ray diffraction patterns showed all the films to be amorphous. The films deposited at high oxygen pressure exhibit higher resistivity than films at low pressure. Energy dispersive spectroscopy(EDS) and rutherford backscattering spectrometry(RBS) were conducted on the films to reveal the composition of the ZnO films. The ZnO films deposited at the high oxygen pressure were extremly sensitive to the humidity of higher than 70%.

하악각 축소술의 합병증

마흥수,임풍,안상태,한기택,오영환 大韓成形外科學會 1990 Archives of Plastic Surgery Vol.17 No.4

A prominent mandibular angle produces a characteristic quadrangular, coares and muscular appearance. Reduction of a prominent mandibular angle and partial resection of hypertrophic masseter muscle were frequently performed for cosmetic reasons. We discussed the complications and their causes and methods of prevention through the experiences of 87 patients of mandibular angle reduction from March, 1984 to September, 1989. The complications were divided into aestheic(asymmerty 3, undercorrection 1, secondary angle formation 2) and surgical(infection 2, subcondylar fracture 2, transient facial palsy 1, massive hemorrhage 2, trismus 10)

In Vitro Small Intestinal Absorption Enhancement of S-164 by Monoolein Cubic Phase Nanoparticles

Hong, S.K.,Ma, J.Y.,Kim, J.-C. Taylor Francis 2013 Journal of dispersion science and technology Vol.34 No.4