Syntheses, crystal structures, circular dichroism, and magnetic properties of chiral dinuclear and polymeric nickel(II) compounds

Shin, J.W.,Son, H.J.,Kim, S.K.,Min, K.S. Pergamon Press 2013 Polyhedron Vol.52 No.-

Chiral dinuclear nickel(II) complexes, [Ni(L<SUP>R,R</SUP>)(C<SUB>2</SUB>O<SUB>4</SUB>)Ni(L<SUP>R,R</SUP>)](ClO<SUB>4</SUB>)<SUB>2</SUB>.4CH<SUB>3</SUB>CN (3) and [Ni(L<SUP>S,S</SUP>)(C<SUB>2</SUB>O<SUB>4</SUB>)Ni(L<SUP>S,S</SUP>)](ClO<SUB>4</SUB>)<SUB>2</SUB>.4CH<SUB>3</SUB>CN (4) and chiral polymeric compounds, [Ni(L<SUP>R,R</SUP>)(CrO<SUB>4</SUB>)]<SUB>n</SUB>.2H<SUB>2</SUB>O.CH<SUB>3</SUB>CN (5) and [Ni(L<SUP>S,S</SUP>)(CrO<SUB>4</SUB>)]<SUB>n</SUB>.2H<SUB>2</SUB>O.CH<SUB>3</SUB>CN (6) have been synthesized and characterized (L<SUP>R,R/S,S</SUP>=1,8-di((R/S)-α-methylbenzyl)-1,3,6,8,10,13-hexaazacyclotetradecane). These chiral compounds were characterized by X-ray crystallography, circular dichroism, and molecular magnetism. The nickel(II) ions in 3 and 4 have a distorted octahedral geometry by coordination with four nitrogens of a macrocyclic ligand with chiral pendents in a folded conformation and two oxygens of an oxalate ion in the cis positions. The nickel(II) ions in 5 and 6 have a distorted octahedral geometry by coordination with four nitrogens of a macrocyclic ligand in a planar conformation and two oxygens of two chromate ions in the axial positions. Complexes 3 and 4 show strong antiferromagnetic interactions [3: g=2.36, J/k<SUB>B</SUB>=-29.9K (-20.8cm<SUP>-1</SUP>); 4: g=2.18, J/k<SUB>B</SUB>=-25.5K (-17.7cm<SUP>-1</SUP>)], while 5 and 6 exhibit weak antiferromagnetic couplings [5: g=2.25, J/k<SUB>B</SUB>=-1.20K (-0.83cm<SUP>-1</SUP>); 6: g=2.25, J/k<SUB>B</SUB>=-0.68K (-0.47cm<SUP>-1</SUP>)]. The former complexes occur strong antiferromagnetic interactions via the oxalato bridges within the nickel(II) dimers, the latter compounds are weak antiferromagnetic interactions through the chromate ions within the 1D polymers. The circular dichroism (CD) spectrum of 3 has exhibited two negative peaks at 336 and 533nm, and that of 4 has displayed an enantiomeric pattern. The CD spectrum of 5 has appeared a negative absorption above ca. 550nm, while that of 6 has shown an enantiomeric pattern in the same wavelength region.

Relationship between Stress Gene Polymorphisms and Litter Size by AI in Pigs

H. J. Jin,I. C. Kim,M. S. Wee,S. H. Yeon,C. D. Kim,S. S. Lee,C. Y. Cho,S. R. Cho,D. S. Son,C. K. Park,Z. D. Li 사단법인 한국동물생명공학회 2007 한국동물생명공학회지 Vol.22 No.4

This study was performed to investigate the relationship between PSS-HSP70 gene polymorphism and artificial insemination (AI) reproductivity in the pigs. The RFLP polymorphism of PSS and the SSCP polymorphisms of HSP70 K1, K3 and K4 PCR product were detected different patterns. In the experiment for AI of fresh semen, spring and fall season showed higher litter size born of 10.89 head than 10.47 head of summer season. Landrace was showed higher litter size of 9.96 head than that of Duroc and Yorkshire(p<0.05). Stress relating PSS and HSP70 polymorphism of PSS-Normal, HSP70 K1-BB, K3-AB, K4-AA showd a highest litter size born of 10.97 head and litter size born alive of 10.69 head than that of the other polymorphisms(p<0.05). In the experiment for AI of frozen semen, effects of season and pig breeds were not showed for litter size born. The stress relating polymorphism of PSS-Carrier, HSP70 K1-BB, K3-BB, K4-AB showed highest litter size born of 11.29 head and litter size born alive of 10.82 head and PSS-Normal, HSP70 K1-BB, K3-AB, K4-AA showed the lowest litter size born of 8.48 head and litter size born alive of 7.33 head than that of the other polymorphisms(p<0.05). These results suggest that AI litter size born for the stress of forzen thawed semen may be affected by PSS and HSP70 polymorphism in pigs.

Relationship between Stress Gene Polymorphisms and Litter Size by AI in Pigs

Jin, H.J.,Kim, I.C.,Wee, M.S.,Yeon, S.H.,Kim, C.D.,Lee, S.S.,Cho, C.Y.,Cho, S.R.,Son, D.S.,Park, C.K. 韓國受精卵移植學會 2007 한국동물생명공학회지 Vol.22 No.4

This study was performed to investigate the relationship between PSS-HSP70 gene polymorphism and artificial insemination (AI) reproductivity in the pigs. The RFLP polymorphism of PSS and the SSCP polymorphisms of HSP70 K1, K3 and K4 PCR product were detected different patterns. In the experiment for AI of fresh semen, spring and fall season showed higher litter size born of 10.89 head than 10.47 head of summer season. Landrace was showed higher litter size of 9.96 head than that of Duroc and Yorkshire (p<0.05). Stress relating PSS and HSP70 polymorphism of PSS-Normal, HSP70 K1-BB, K3-AB, K4-AA showd a highest litter size born of 10.97 head and litter size born alive of 10.69 head than that of the other polymorphisms(p<0.05). In the experiment for AI of frozen semen, effects of season and pig breeds were not showed for litter size born. The stress relating polymorphism of PSS-Carrier, HSP70 K1-BB, K3-BB, K4-AB showed highest litter size born of 11.29 head and litter size born alive of 10.82 head and PSS-Normal, HSP70 K1-BB, K3-AB, K4-AA showed the lowest litter size born of 8.48 head and litter size born alive of 7.33 head than that of the other polymorphisms(p<0.05). These results suggest that AI litter size born for the stress of forzen thawed semen may be affected by PSS and HSP70 polymorphism in pigs.

Ion beam induced atomic transport in bilayer systems

J.H.Son,T.G.Kim,G.S.Chang,C.N.Whang,J.H.Song,K.H.Chae 한국물리학회 2002 Current Applied Physics Vol.2 No.2

Atomic transport in ion beam mixed Co/Pt and Pd/Au bilayer systems have been studied from the shifts of maker layers inRutherford backscattering spectroscopy. Thin layers (1 nm) of marker (Pd for Co/Pt and Ni for Pd/Au) were embedded as markersat each interfaces. 80 keV Arþ was used to irradiate the marker samples at the temperature range between 90 and 600 K. The Co/PtJCo=JPt. 1:1) at low temperatures and anisotropic atomic transport (JCo=JPt. 5:0) athigh temperatures. Meanwhile, the Pd/Au system shows near isotropic atomic transport (JPd=JAu . 1:2) at all temperatures ex-and the vacancy migration energy. Atomic transport in thermal spike regime is closely related with the activation energy for normalimpurity diusion. In radiation enhanced diusion regime, the cohesive energy and/or the vacancy migration energy plays adominant role for the atomic transport.. 2001 Elsevier Science B.V. All rights reserved.

Soft Magnetic Properties of Annealed Co - Based Amorphous Co66Fe₄Ni₁B15Si₁₄ Alloy Ribbon

J. S. Yang,D. Son,Y. Cho,K. S. Ryu 한국자기학회 1997 Journal of Magnetics Vol.2 No.4

The amorphous Co-based alloy Co_(66)Fe₄Ni₁B_(15)Si₁₄ (Metglas^® 2714A) is a suitable magnetic core material for high frequency operation. Appreciable reduction of the coercive force can be achieved by proper heat treatment. In this study, samples annealed at wide temperature range were analyzed using differential scanning calorimetry, high frequency B-H loop tester, X-ray diffractometer and resistivity meter. The results show that coercive force at 10 ㎑ decreases with increasing annealing temperature up to 773 K, but dramatically increases above this temperature. The squareness shows that the magnetic anisotropy on longitudinal direction of the as-cast state remains up to 773 K. Above this temperature, it decreases down to 0.5 that represents random distribution of magnetic domains. The crystallization abruptly occurs between 781 K and 783 K.

Minimum Slugging Velocity in a Gas Fluidized Beds

Ryu, H.-J 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.3

Effects of Temperature and Height on the Transition Velocity to Turbulent Flow Regime in a Gas Fluidized Bed

Ryu, H.-J 한국화학공학회 1999 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.37 No.2

간호대학생의 죽음교육 여부에 따른 죽음에 대한 태도 조사 연구

김수정,사혜미,손수경,송현진,유은정,윤미경,정지선,한상희,황민화,황혜영 이화여자대학교 간호과학대학 2010 이화간호학회지 Vol.- No.44

The purpose of this research is to stress the necessity of death education in nursing study through surveying nursing students' attitude towards death. This research is based on random electives who participated in the survey: the survey reveals nursing students' attitude towards death, and was done through cross-sectional approach. Results: 1.The results revealed similarity upon "semester", among the general characteristics. Students on their seventh semester were more positive towards death than students on their fifth semester; junior students average points was 63.70 (±7.459); those of seniors was 68.40 (±7.536). 2.There were similarities among the following questions of attitude towards death: ‘anxieties about death’ (F=6.866, p=.000) ‘personal meaning of death’ (F=3.609, p=.015) ‘the people who you would like at your death bed’ (F=2.556, p=.031) ‘the prospect of testament’ (F=4.005, p=.009) ‘the sense you feel when thinking about death’ (F=5.209, p=.001). 3.There was no noticeable difference between people who received death education, 66.73(±7.469)and those who did not, 64.35(±8.033). (t=.588, p=.095). Conclusion: In this research, education of death barely made any difference of students’ attitude towards death compared to those who did not receive the education. It is a fact, however, that various researches show different results about the effects of death education. Therefore, continuous study about the correlation between death education and attitude towards death is strongly recommended.

약(葯)배양 기법 이용한 이탈리안 라이그라스 식물체 생산

김기용,강경민,최기준,임용우,장요순,성병렬,손대영,이병현,조진기 Plant molecular biology and biotechnology research 2002 Plant molecular biology and biotechnology research Vol.2002 No.-

We obtained regenerated Italian ryegrass (Lolium multiflorum Lam.) plants by anther culture. When Italian ryegrass anther was incubated for 20 days on callus induction medium, MS medium containing 30 g/ℓ of NAA and 1 mg/ℓ of kinetin its callus was induced. The ratio of callus induction was 9.2 %, the mean of callus weight was 8.6 mg/callus/anther. When Italian ryegrass callus was incubated for 50 days on plant regeneration medium, MS medium containing 30 g/ℓ of sucrose, 1 mg/ℓ of NAA and 2 mg/ℓ of kinetin, Italian ryegrass plant was regenerated. The ratio of plant regeneration was 26%.

Aluminizing and Boroaluminizing Treatments of Mar-M247 and Their Effect on Hot Corrosion Resistance in Na₂SO₄-NaCl Molten Salt

Cho, J.H.,Kim, T.W.,Son, K.S.,Yoon, J.H.,Kim, H.S.,Leisk, G.G.,Mitton, D.B.,Latanision, R.M. 대한금속재료학회 2003 METALS AND MATERIALS International Vol.9 No.3

The effect of surface modifications of Mar-M247 superalloy on hot corrosion resistance was examined in Na₂SO₄-NaCl molten salt. The Mar-M247 was aluminized and boroaluminized by pack cementation in Ar and underwent a cyclic hot corrosion test in Na₂SO₄-NaCl molten salt. The XRD results showed that a Ni2Al3 phase was formed between the aluminized layer and the substrate when the surface modification temperature was below 1273 K. However, a NiAl phase formed when the temperature was above 1273 K. The intensity of the XRD peak in the NiAl phase increased after post heat treatment. Hot corrosion resistance increased for the specimens containing NiAl rather than Ni₂Al₃ phase. The ductile NiAl phase suppressed the potential for crack initiation during thermal cycling. Post heat treatment increased the corrosion resistance of the aluminized layer for Mar-M247, which underwent surface modification at 1273 K and above. In the boroaluminized Mar-M247 specimens, corrosion resistance decreased as a result of the blocking of outward diffusion of Cr by boron and decreased cohesion between the oxide scale and the aluminized layer during thermal cycling.