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Search Results: 1 - 10 of 20465 matches for " Minjung Kim "
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Effects of early breastfeeding education on maintenance of breastfeeding practice: A prospective observational study  [PDF]
Tae-Hee Kim, Hae-Hyeog Lee, Junsik Park, Seyeon Jang, Minjung Kim
Open Journal of Nursing (OJN) , 2013, DOI: 10.4236/ojn.2013.32028
Abstract:

Background: Breast feeding is an ideal feeding type for most infants and mothers. We evaluated the effect of early breast-feeding and prenatal education of breast- feeding in maintenance of breast-feeding practice after delivery. Methods: Eighty two pregnant women who experienced vaginal delivery were recruited from the department of obstetrics and gynecology of a university hospital between January 2006 and October 2006. These differences among variables were determined using SPSS ver. 10.0 (SPSS Inc., Chicago, IL, USA). Follow-up telephone interviews were conducted 1 week and 4 weeks after delivery to check feeding method for baby and other complications. Results: We calculated the correlations among the pregnant women’s age, height, and weight, abortion experience, the newborn’s weight, and social factors using ANOVA. There was no statistically significant relationship between early breast-feeding and maintenance of breast-feeding practice. Conclusions: Antenatal and post- partum period education about breast-feeding is necessary for breast-feeding practice maintenance. Further studies in developing educational programs are needed.

System-Wide Immunohistochemical Analysis of Protein Co-Localization
MinJung Kim, Virawudh Soontornniyomkij, Baohu Ji, Xianjin Zhou
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0032043
Abstract: Background The analysis of co-localized protein expression in a tissue section is often conducted with immunofluorescence histochemical staining which is typically visualized in localized regions. On the other hand, chromogenic immunohistochemical staining, in general, is not suitable for the detection of protein co-localization. Here, we developed a new protocol, based on chromogenic immunohistochemical stain, for system-wide detection of protein co-localization and differential expression. Methodology/Principal Findings In combination with a removable chromogenic stain, an efficient antibody stripping method was developed to enable sequential immunostaining with different primary antibodies regardless of antibody's host species. Sections were scanned after each staining, and the images were superimposed together for the detection of protein co-localization and differential expression. As a proof of principle, differential expression and co-localization of glutamic acid decarboxylase67 (GAD67) and parvalbumin proteins was examined in mouse cortex. Conclusions/Significance All parvalbumin-containing neurons express GAD67 protein, and GAD67-positive neurons that do not express parvalbumin were readily visualized from thousands of other neurons across mouse cortex. The method provided a global view of protein co-localization as well as differential expression across an entire tissue section. Repeated use of the same section could combine assessments of co-localization and differential expression of multiple proteins.
Polarization dependence of photocurrent in a metal-graphene-metal device
Minjung Kim,Ho Ang Yoon,Seungwoo Woo,Duhee Yoon,Sang Wook Lee,Hyeonsik Cheong
Physics , 2012, DOI: 10.1063/1.4745787
Abstract: The dependence of the photocurrent generated in a Pd/graphene/Ti junction device on the incident photon polarization is studied. Spatially resolved photocurrent images were obtained as the incident photon polarization is varied. The photocurrent is maximum when the polarization direction is perpendicular to the graphene channel direction and minimum when the two directions are parallel. This polarization dependence can be explained as being due to the anisotropic electron-photon interaction of Dirac electrons in graphene.
Triangle-free intrinsically knotted graphs with 22 edges
Hyoungjun Kim,Hwa Jeong Lee,Minjung Lee,Thomas Mattman,Seungsang Oh
Mathematics , 2014,
Abstract: A graph is called intrinsically knotted if every embedding of the graph contains a knotted cycle. Johnson, Kidwell and Michael showed that intrinsically knotted graphs have at least 21 edges. Recently Lee, Kim, Lee and Oh, and, independently, Barsotti and Mattman, showed that $K_7$ and the 13 graphs obtained from $K_7$ by $\nabla Y$ moves are the only intrinsically knotted graphs with 21 edges. In this paper we present the following results: there are exactly three triangle-free intrinsically knotted graphs with 22 edges having at least two vertices of degree 5. Two are the cousins 94 and 110 of the $E_9+e$ family and the third is a previously unknown graph named $M_{11}$. These graphs are shown in Figure 3 and 4. Furthermore, there is no triangle-free intrinsically knotted graph with 22 edges that has a vertex with degree larger than 5.
The Response of the Prostate to Circulating Cholesterol: Activating Transcription Factor 3 (ATF3) as a Prominent Node in a Cholesterol-Sensing Network
Jayoung Kim, Dolores Di Vizio, Taek-Kyun Kim, Jonghwan Kim, Minjung Kim, Kristine Pelton, Steven K. Clinton, Tsonwin Hai, Daehee Hwang, Keith R. Solomon, Michael R. Freeman
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0039448
Abstract: Elevated circulating cholesterol is a systemic risk factor for cardiovascular disease and metabolic syndrome, however the manner in which the normal prostate responds to variations in cholesterol levels is poorly understood. In this study we addressed the molecular and cellular effects of elevated and suppressed levels of circulating cholesterol on the normal prostate. Integrated bioinformatic analysis was performed using DNA microarray data from two experimental formats: (1) ventral prostate from male mice with chronically elevated circulating cholesterol and (2) human prostate cells exposed acutely to cholesterol depletion. A cholesterol-sensitive gene expression network was constructed from these data and the transcription factor ATF3 was identified as a prominent node in the network. Validation experiments confirmed that elevated cholesterol reduced ATF3 expression and enhanced proliferation of prostate cells, while cholesterol depletion increased ATF3 levels and inhibited proliferation. Cholesterol reduction in vivo alleviated dense lymphomononuclear infiltrates in the periprostatic adipose tissue, which were closely associated with nerve tracts and blood vessels. These findings open new perspectives on the role of cholesterol in prostate health, and provide a novel role for ATF3, and associated proteins within a large signaling network, as a cholesterol-sensing mechanism.
Alpha-Fetoprotein, Identified as a Novel Marker for the Antioxidant Effect of Placental Extract, Exhibits Synergistic Antioxidant Activity in the Presence of Estradiol
Hye Yeon Choi, Seung Woo Kim, BongWoo Kim, Hae Na Lee, Su-Jeong Kim, Minjung Song, Sol Kim, Jungho Kim, Young Bong Kim, Jin-Hoi Kim, Ssang-Goo Cho
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0099421
Abstract: Placenta, as a reservoir of nutrients, has been widely used in medical and cosmetic materials. Here, we focused on the antioxidant properties of placental extract and attempted to isolate and identify the main antioxidant factors. Porcine placental extracts were prepared through homogenization or acid hydrolysis, and their antioxidant activity was investigated in the human keratinocyte HaCaT cell line. Treatment with homogenized placental extract (H-PE) increased the cell viability of H2O2-treated HaCaT cells more than two-fold. H-PE treatment suppressed H2O2-induced apoptotic and necrotic cell death and decreased intracellular ROS levels in H2O2-treated HaCaT cells. The antioxidant factors in H-PE were found to be thermo-unstable and were thus expected to include proteins. The candidate antioxidant proteins were fractionated with cation-exchange, anion-exchange, and size-exclusion chromatography, and the antioxidant properties of the chromatographic fractions were investigated. We obtained specific antioxidant fractions that suppressed ROS generation and ROS-induced DNA strand breaks. From silver staining and MALDI-TOF analyses, alpha-fetoprotein (AFP) precursor was identified as a main marker for the antioxidant effect of H-PE. Purified AFP or ectopically expressed AFP exhibited synergistic antioxidant activity in the presence of estradiol. Taken together, our data suggest that AFP, a serum glycoprotein produced at high levels during fetal development, is a novel marker protein for the antioxidant effect of the placenta that exhibits synergistic antioxidant activity in the presence of estradiol.
Measurement of electrons from heavy-flavour decays in pp and Pb-Pb collisions with ALICE at the LHC
MinJung Kweon,for the ALICE Collaboration
Physics , 2012,
Abstract: The ALICE experiment has measured at mid-rapidity electrons from heavy-flavour decays in pp collisions at $\sqrt{s}$ = 2.76 and 7 TeV, and in Pb-Pb collisions at $\sqrt{s_{\rm NN}}$ = 2.76 TeV. In pp collisions, electrons from charm-hadron and from beauty-hadron decays are identified by applying cuts on displaced vertices. The relative yield of electrons from beauty-hadron decays to those from heavy-flavour decays is extracted using electron-hadron correlations. Results are compared to pQCD-based calculations. In Pb-Pb collisions, the $p_{\rm T}$ dependence of the nuclear modification factor of electrons from heavy-flavour decays is presented in two centrality classes. The status on the analysis of electrons from beauty-hadron decays is reported in Pb-Pb collisions, in view of the measurement of the corresponding nuclear modification factor.
Explicit recurrence criteria for symmetric gradient type Dirichlet forms satisfying a Hamza type condition
Minjung Gim,Gerald Trutnau
Mathematics , 2013,
Abstract: In this note, we present explicit conditions for symmetric gradient type Dirichlet forms to be recurrent. This type of Dirichlet form is typically strongly local and hence associated to a diffusion. We consider the one dimensional case and the multidimensional case, as well as the case with reflecting boundary conditions. Our main achievement is that the explicit results are obtained under quite weak assumptions on the closability, hence regularity of the underlying coefficients. Especially in dimension one, where a Hamza type condition is assumed, the construction of the sequence of functions $(u_n)_{n\in \N}$ in the Dirichlet space that determine recurrence works for quite general Dirichlet forms but is still explicit.
Recurrence criteria for generalized Dirichlet forms
Minjung Gim,Gerald Trutnau
Mathematics , 2015,
Abstract: We develop sufficient analytic conditions for recurrence and transience of non-sectorial perturbations of possibly non-symmetric Dirichlet forms on a general state space. These form an important subclass of generalized Dirichlet forms which were introduced in \cite{St1}. In case there exists an associated process, we show how the analytic conditions imply recurrence and transience in the classical probabilistic sense. As an application, we consider a generalized Dirichlet form given on a closed or open subset of $\mathbb{R}^d$ which is given as a divergence free first order perturbation of a non-symmetric energy form. Then using volume growth conditions of the sectorial and non-sectorial first order part, we derive an explicit criterion for recurrence. Moreover, we present concrete examples with applications to Muckenhoupt weights and counterexamples. The counterexamples show that the non-sectorial case differs qualitatively from the symmetric or non-symmetric sectorial case. Namely, we make the observation that one of the main criteria for recurrence in these cases fails to be true for generalized Dirichlet forms.
Photocurrent generation at ABA/ABC lateral junction in tri-layer graphene photodetector
Minjung Kim,Seon-Myeong Choi,Ho Ang Yoon,Sun Keun Choi,Jae-Ung Lee,Jungcheol Kim,Sang Wook Lee,Young-Woo Son,Hyeonsik Cheong
Physics , 2015, DOI: 10.1016/j.carbon.2015.09.095
Abstract: Metal-graphene-metal photodetectors utilize photocurrent generated near the graphene/metal junctions and have many advantages including high speed and broad-band operation. Here, we report on photocurrent generation at ABA/ABC stacking domain junctions in tri-layer graphene with a responsivity of 0.18 A/W. Unlike usual metal-graphene-metal devices, the photocurrent is generated in the middle of the graphene channel, not confined to the vicinity of the metal electrodes. The magnitude and the direction of the photocurrent depend on the back-gate bias. Theoretical calculations show that there is a built-in band offset between the two stacking domains, and the dominant mechanism of the photocurrent is the photo-thermoelectric effect due to the Seebeck coefficient difference.
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