棚素施肥水準과 刈取管理가 Alfalfa(Medicago sativa L.)의 生育과 收量및 飼料價値에 미치는 영향

金雲植,文相鎬,全炳台,李相武 建國大學校 附設 自然科學硏究所 1991 建國自然科學硏究誌 Vol.2 No.-

本 實驗은 硼砂施肥水準과 刈取管理가 알팔파의 生育과 收量 및 飼料價値에 미치는 影響을 糾明하여 실질적인 栽培技術과 利用性提高를 目的으로 硼砂施肥水準(0,15,60Kg/ha)을 主區로 하고 生育段階를 細區로(Bud, 10% bloom, 100% bloom)하여 1989년 3월∼1990년 9월까지 建國大學校 自然科學大學 附屬 實習農場內 試料圃場에서 실시한 바, 그 結果를 要約하면 다음과 같다. 1. 草長에 있어서 硼砂施肥의 效果는 나타나지 않았으나, 初年度의 1, 2次 刈取와 2次 年度의 1次 刈取에서 生育이 진행됨에 따라 높게 나타났다. 2. 硼砂施肥에 따른 B??·B₁·B₂區의 收量에는 有意差가 없었으며, 生育이 진행됨에 따라 乾物收量은 높게 나타나 有意性이 (p<0.01, 0.05) 인정되었다. 3. 粗蛋白質 및 NDF, ADF 成分에 대한 硼砂 影響은 없었으며 生育이 진행됨에 따라 粗蛋白質含量은 떨어지고 NDF, ADF含量은 높아졌다. 4. 硼砂施肥에 의한 粗蛋白質收量은 有意差가 없었으며, 生育이 진행됨에 따라 粗蛋白質收量은 높게 나타나 그 有意性이 (p<0.05) 인정되었다. 5. 硼砂施肥에 따른 嗜好性은 B??·B₁·B₂區가 같은 傾向을 보였으며, 生育段階에 따른 嗜好性은 많은 차이를 보여 初年度의 1次 刈取時 Bud >10% bloom >100% bloom期 순으로 높게 나타났다. The purpose of the experiment was carried out to determine the effects of boron application and cutting management on the growth, yield and feeding value for the purpose of practical culture and utilization techniques. The trial was performed at different borax application level(main treatments ; 0, 15, 30kg/ha) and growth stage(sub treatments : Bud, 10% bloom and 100% bloom stage) from 1989 to 1990 in experimental field college of Natural Science, Kon Kuk University. The results obtained are summarized as follows : 1. The effect of borax application in the plant length was shown, but plant length in the first and second cutting time of the first year and first cutting time of the second year after sown was high by the progression of growth. 2. There was not significant among main treatments(B??·B₁·B₂)in dry matter yield, but was shown significantly high (p<0.01, 0.05) by the progression of growth in first cutting time. 3. The content of chemical composition, NDF and ADF were not affected by boron application, and content of crude protein was decreased and those of curde fiber, NDF and ADF were increased by the progression of growht in first cutting time. 4. There was not significant among main treatments(B??·B₁·B₂) in crude protein yield but was significant (p<0.05) by the progression of growth in first cutting time. 5. There was not significant among main treatments(B??·B₁·B₂) in palatability, but palatability by growth stage was the highest at bud stage in first cutting time of first year after sown.

B-containing nanomaterial synthesis when a combustion wave moves within a packed bed of solid particles

Nersisyan, H.,Lee, T.H.,Yoo, B.U.,Kwon, S.C.,Suh, H.,Kim, J.G.,Lee, J.H. Elsevier [etc.] 2016 Combustion and Flame Vol.172 No.-

This study deals with combustion behavior of B<SUB>2</SUB>O<SUB>3</SUB>/Mg/NH<SUB>4</SUB>Cl/C complex systems for the synthesis of amorphous boron (B), boron carbide (B<SUB>4</SUB>C), and boron nitride (BN) nanostructures. The raw mixtures used in the experiments were prepared on the base of a B<SUB>2</SUB>O<SUB>3</SUB>-Mg precursor mixture, which is sufficiently exothermic to maintain a self-propagating regime of the combustion reaction. Thermodynamic analysis of the combustion temperatures and experimental validation indicate that the 1000-1500<SUP>o</SUP>C temperature range is very effective for synthesizing the nanostructures of B, B<SUB>4</SUB>C, and BN. It was found that B-containing functional nanostructures are mainly spherical nanoparticles (B) or nanosheets (B<SUB>4</SUB>C, BN). The phase composition and microstructural characteristics of the final products were evaluated based on the combustion temperature and solid/liquid phase changes.

Molecular characterization and expression analysis of IκB from Haliotis discus discus

Kasthuri, S.R.,Whang, I.,Navaneethaiyer, U.,Lim, B.S.,Choi, C.Y.,Lee, J. Academic Press 2013 Fish & shellfish immunology Vol.34 No.6

Innate immune system relies on the recognition of pathogen associated molecular patterns present in the microbes by the pattern recognition receptors leading to the activation of signaling cascade and subsequent synthesis of cytokines. NF-κB is a major stimulus activated transcription factor, which regulates the expression of a diverse array of genes. IκB is an inhibitor of NF-κB, retaining NF-κB in an inactive state in the cytoplasm. In this study, we have reported the characterization of first abalone IκB (HdIκB). The cDNA possessed an ORF of 1200 bp coding for a protein of 400 amino acids with molecular mass of 45 kDa and isoelectric point of 4.7. HdIκB protein possessed a conserved phosphorylation site <SUP>58</SUP>DSGIFS<SUP>63</SUP> in the N-terminal region, six ankyrin repeats, and a PEST sequence in the C-terminal region. A casein kinase II phosphorylation site could also be observed in the PEST sequence. Constitutive expression of HdIκB revealed its physiological significance since NF-κB is known to be activated by various stimuli. Elevated expression of HdIκB transcripts could be observed in abalones challenged with various mitogens and live microbes. This novel characterization of abalone IκB would further be a positive approach in the affirmation of evolutionary conservation and significance of this protein as a repressor/inhibitor of a pleiotropic transcription factor like NF-κB.

Compositional homogeneity and X-ray topographic analyses of CdTe_<i>x</i>Se_1−<i>x</i> grown by the vertical Bridgman technique

Roy, U.N.,Bolotnikov, A.E.,Camarda, G.S.,Cui, Y.,Hossain, A.,Lee, K.,Lee, W.,Tappero, R.,Yang, Ge,Cui, Y.,Burger, A.,James, R.B. Elsevier 2015 Journal of crystal growth Vol.411 No.-

<P><B>Abstract</B></P> <P>We grew CdTe<SUB> <I>x</I> </SUB>Se<SUB>1−<I>x</I> </SUB> crystals with nominal Se concentrations of 5%, 7%, and 10% by the vertical Bridgman technique, and evaluated their compositional homogeneity and structural quality at the NSLS’ X-ray fluorescence and white beam X-ray topography beam lines. Both X-ray fluorescence and photoluminescence mapping revealed very high compositional homogeneity of the CdTe<SUB> <I>x</I> </SUB>Se<SUB>1−<I>x</I> </SUB> crystals. We noted that those crystals with higher concentrations of Se were more prone to twinning than those with a lower content. The crystals were fairly free from strains and contained low concentrations of sub-grain boundaries and their networks.</P> <P><B>Highlights</B></P> <P> <UL> <LI> CdTeSe crystals were grown by the vertical Bridgman technique. </LI> <LI> Very high compositional homogeneity. </LI> <LI> Low concentration of sub-grain boundaries. </LI> <LI> Almost free from sub-grain boundary network. </LI> </UL> </P>

Inequalities for the angular derivatives of certain classes of holomorphic functions in the unit disc

B\"{u}lent Nafi \"{O}rnek 대한수학회 2016 대한수학회보 Vol.53 No.2

In this paper, a boundary version of the Schwarz lemma is investigated. We take into consideration a function $f(z)=z+c_{p+1}z^{p+1}+c_{p+2}z^{p+2}+\cdots$ holomorphic in the unit disc and $\left\vert \frac{f(z)}{\lambda f(z)+(1-\lambda )z}-\alpha \right\vert <\alpha $ for $\left\vert z\right\vert <1$, where $\frac{1}{2}<\alpha \leq \frac{1}{1+\lambda }$, $ 0\leq $ $\lambda <1$. If we know the second and the third coefficient in the expansion of the function $f(z)=z+c_{p+1}z^{p+1}+c_{p+2}z^{p+2}+\cdots$, then we can obtain more general results on the angular derivatives of certain holomorphic function on the unit disc at boundary by taking into account $ c_{p+1}$, $c_{p+2}$ and zeros of $f(z)-z$. We obtain a sharp lower bound of $ \left\vert f^{\prime }(b)\right\vert $ at the point $b$, where $\left\vert b\right\vert =1$.

Sea-urchin-like iron oxide nanostructures for water treatment

Lee, H.U.,Lee, S.C.,Lee, Y.C.,Vrtnik, S.,Kim, C.,Lee, S.,Lee, Y.B.,Nam, B.,Lee, J.W.,Park, S.Y.,Lee, S.M.,Lee, J. Elsevier Scientific Pub. Co 2013 Journal of hazardous materials Vol.262 No.-

To obtain adsorbents with high capacities for removing heavy metals and organic pollutants capable of quick magnetic separation, we fabricated unique sea-urchin-like magnetic iron oxide (mixed γ-Fe<SUB>2</SUB>O<SUB>3</SUB>/Fe<SUB>3</SUB>O<SUB>4</SUB> phase) nanostructures (called u-MFN) with large surface areas (94.1m<SUP>2</SUP>g<SUP>-1</SUP>) and strong magnetic properties (57.9emug<SUP>-1</SUP>) using a simple growth process and investigated their potential applications in water treatment. The u-MFN had excellent removal capabilities for the heavy metals As(V) (39.6mgg<SUP>-1</SUP>) and Cr(VI) (35.0mgg<SUP>-1</SUP>) and the organic pollutant Congo red (109.2mgg<SUP>-1</SUP>). The u-MFN also displays excellent adsorption of Congo red after recycling. Because of its high adsorption capacity, fast adsorption rate, and quick magnetic separation from treated water, the u-MFN developed in the present study is expected to be an efficient magnetic adsorbent for heavy metals and organic pollutants in aqueous solutions.

Boron 확산침투법에 의한 STD61강종의 표면개질처리에 관한 연구

이상로,남기식,차병묵,윤재홍,변응선 國立 昌原大學校 産業技術硏究所 1995 産技硏論文集 Vol.9 No.-

STD 61 steel was boronized in boronizing paste mainly consisted of B₄C, Na₂B₄O7 at various temperature and times. The microhardness and the thickness of boride layers were measured and the distributions of B, Si, Cr, V on the cross section of specimens were observed by EPMA line analysis. Microscopic examination and the results of EPMA showed that the boride layer consisted of two layer and outer layer was FeB, inner was Fe₂B. The mictohardness of these boride layers were about Hv 1800~2300. Thickness of the boride layer was increased with an increase of square root of time for treatment at constant temperature. The activation energy for diffusion of B in the specimen obtained from the slope of Arrhenius plots was 260kJ/mol. α layer of Si rich was formed at the space between boride layer and matrix. Element such as Cr were concentrated as the Cr23(B,C)6 composition beneath the boride layer.

Preparation and performance of polyaniline-multiwall carbon nanotubes-titanium dioxide ternary composite electrode material for supercapacitors

Singu, B.S.,Male, U.,Srinivasan, P.,Yoon, K.R. THE KOREAN SOCIETY OF INDUSTRIAL AND ENGINEERING 2017 JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY -S Vol.49 No.-

<P>Multi-walled carbon nanotubes (MWNTs), and titanium oxide (TiO2) were incorporated in polyaniline (PANI) to enhance the pseudocapacitance and cycle stability of PANI. PANI-MWNTs-TiO2, ternary composite was prepared by in-situ chemical polymerization of aniline in the presence of MWNTs and TiO2. Morphology analysis of ternary composite revealed the uniform covering of MWNTs by PANI nanofibers and TiO2 nanoparticles. The specific capacitance of PANI-MWNTs-TiO2 is 270 Fg-1, much higher than that of MWNTs (30 Fg(-1)) and PANI (210 Fg(-1)) electrodes. PANI-MWNTs-TiO2 showed good rate capability with excellent cycling stability. (C) 2017 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry.</P>

Dual-end-functionalized tin (Sn)-phyllosilicates for the esterification of oleic acid

Nam, B.,Lee, H.U.,Park, S.Y.,Son, B.C.,Lee, G.W.,Park, J.Y.,Lee, Y.C. Korean Society of Industrial and Engineering Chemi 2016 Journal of industrial and engineering chemistry Vol.41 No.-

<P>We designed dual-end-functionalized tin (Sn)-phyllosilicate, where the -SH functional groups were subsequently oxidized for -SO3H/SO4H functionalities in a Bronsted acid with/without NH2 functional groups in a Bronsted base. Dual-end-functionalized tin (Sn)-phyllosilicates [MTES:APTS = 1.0:0.11, MTES:TEOS = 1.0:0.11 and 1.0:0.43, v/v] were fabricated where the inorganic framework of Sn species can function as a Lewis acid. The Sn-phyllosilicates with dual acids were applied to esterify oleic acid and produce oleic acid-methyl-ester to test their feasibility as fatty-acid-conversion solid catalysts. In the absence of amine groups, the increase in ratio of tetraethyl orthosilicate (TEOS) to (3-mercaptopropyl)-trimethoxysilane (MTES) for the synthesis of Sn-phyllosilicates (MTES:TEOS = 1.0:0.11 and 1.0:0.43, v/v) increased the recovery of Sn-phyllosilicate in the solvent media and gradually decreased the oleic acid methyl-ester production efficiency (%) of the oleic acid conversion. At the fixed 2.0 wt% Sn-phyllosilicate (MTES:APTS = 1.0:0.11, v/v) loading and oleic acid:MeOH weight ratio = 1:1, an 80 degrees C reaction temperature and 4 h reaction time were determined to be the optimal conditions for the oleic acid methyl-ester production, which had 90% oleic acid conversion efficiency. When the Sn-phyllosilicate (MTES:APTS = 1.0:0.11, v/v) loading was increased from 0.1 to 5.0 wt% at 80 degrees C and 4 h, the fatty-acid conversion efficiency (%) of oleic acid gradually increased from 39.16 to 92.23%. In contrast, Sn-phyllosilicate (MTES:TEOS = 1.0:0.43) had the lowest oleic acid conversion efficiency (%) but the highest catalyst recovery. In summary, this study presents a facile method to produce oleic acid conversion catalysts on an industrial scale. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.</P>

Selective novel inverse agonists for human GPR43 augment GLP-1 secretion

Park, B.O.,Kim, S.H.,Kong, G.Y.,Kim, D.H.,Kwon, M.S.,Lee, S.U.,Kim, M.O.,Cho, S.,Lee, S.,Lee, H.J.,Han, S.B.,Kwak, Y.S.,Lee, S.B.,Kim, S. North-Holland ; Elsevier Science Ltd 2016 european journal of pharmacology Vol.771 No.-

<P>GPR43/Free Fatty Acid Receptor 2 (FFAR2) is known to be activated by short-chain fatty acids and be coupled to G(i), and G(q), family of heterotrimeric G proteins. GPR43 is mainly expressed in neutrophils, adipocytes and enteroendocrine cells, implicated to be involved in inflammation, obesity and type 2 diabetes. However, several groups have reported the contradictory data about the physiological functions of GPR43, so that its roles in vivo remain unclear. Here, we demonstrate that a novel compound of pyrimidinecarboxamide class named as BTI-A-404 is a selective and potent competitive inverse agonist of human GPR43, but not the murine ortholog. Through structure-activity relationship (SAR), we also found active compound named as BTI-A-292. These regulators increased the cyclic AMP level and reduced acetate-induced cytoplasmic Ca2+ level. Furthermore, we show that they modulated the downstream signaling pathways of GPR43, such as ERK, p38 MAPK, and NF-kappa B. It was surprising that two compounds augmented the secretion of glucagon-like peptide 1 (GLP-1) in NCI-H716 cell line. Collectively, these novel and specific competitive inhibitors regulate all aspects of GPR43 signaling and the results underscore the therapeutic potential of them. (C) 2015 Elsevier B.V. All rights reserved.</P>