• International Journal of Oral Biology
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• v.39 no.3
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• pp.145-151
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• 2014

During bone remodeling, there is requirement of differentiation of osteoblastic cells. Previously, we identified proteins differentially expressed in soft tissue during bone healing. Of these proteins, we focused the effect of LTF on differentiation of osteoblast. In order to analyze the osteogenic ability of LTF, we treated conditioned media collected from human LTF-stably transfected HEK293T cells into osteoblastic MC3T3-E1. The results showed that the activity and expression of alkaline phosphatase were increased in MC3T3-E1 cells treated with conditioned media containing LTF in dose- and time-dependent manner. At the same time, we observed the significant increase of the expression of osteoblastic genes, such as ALP, BSP, COL1A1, and OCN, and along with matrix mineralization genes, such as DMP1 and DMP2, in LTF conditioned media-treated groups. Moreover, the result of treating recombinant human LTF directly into osteoblastic MC3T3-E1 showed the same pattern of treating conditioned media containing LTF. Our study demonstrated that LTF constitutively enhances osteoblastic differentiation via induction of osteoblastic genes and activation of matrix mineralization in MC3T3-E1 cells.

• The Korean Journal of Pesticide Science
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• v.18 no.1
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• pp.41-47
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• 2014

This study was performed to evaluate the exposure level of organophosphorus and pyrethroid pesticide to floriculture workers and florists. The urinary dialkylphosphates, metabolites of organophosphorus insecticides, including dimethylphosphate (DMP), diethylphosphate (DEP), dimethylthiophosphate (DMTP), diethylthiophosphate(DETP) and pyrethroids of metabolites, cis/trans DCCA, DBCA, and 3-PBA were analysed to evaluate the exposure of organophosphorus and pyrethroid pesticide to floriculture workers and florists. The concentration of DMP is highest in floriculture workers. but the concentration of DETP is highest in retail florist. The concentration of 3-PBA is highest in floriculture workers. The amount of organophosphorus and pyrethroid pesticide expusure is highest in flower workers, wholesale florist and retail florists are followed. The management for reducing pesticide exposure to floriculture workers and wholesale florist is required.

• The Korean Journal of Pesticide Science
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• v.20 no.2
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• pp.172-180
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• 2016

This study was conducted to evaluate the relations between the exposure level of organophosphates (OPs) pesticide and application factors among rural farmers. The urinary dialkylphosphates, metabolites of organophosphorus pesticides, including DMP, DEP, DMTP and DETP were analyzed by GC/MSD and GC/MS/MS. The DMP and DMTP were detected more in the use of a speed sprayer without cap than with a capped one. Also, the less farmers wore the personal protective equipment (PPE), the more these were detected. The amount of organophosphorus exposure was the highest in the use of a power sprayer. However, it was low when a farmer applied pesticides with a speed sprayer with cap and wore more PPE. In this study, the detection rate was analyzed by chi-square test, the exposure level of OPs was analyzed by a generalized linear model.

• Applied Chemistry for Engineering
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• v.3 no.1
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• pp.111-118
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• 1992

The curing acceleration of epoxy/amine system was investigated by using differential scanning calorimeter(DSC), The epoxy, diglycidylether of bisphenol A (DGEBA) was cured with methylene dianiline (MDA) with or without accelerators. Two kinds of accelerators were tested for the study ; tris(dimethylaminomethyl)phenol (DMP - 30) and 3 - (3,4 - dichlorophenyl)-1, 1-dimethylurea (DIURON). Heats of reaction and glass transition temperatures ($T_g$) of the cured epoxy system were analyzed by DSC along with the estimation of activation energy by the dynamic DSC studies. It was found that DMP - 30 is more effective accelerator than DIURON which showed faster curing and lower activation energy.

• Journal of dental hygiene science
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• v.9 no.4
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• pp.427-433
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• 2009

Nuclear factor I-C (NFI-C) null mice demonstrated aberrant odontoblast differentiation and abnormal dentin formation. In order to elucidate the mechanisms responsible for these changes, we evaluated the expression of dentin matrix gene after over-expression and inactivation of NFI-C in MDPC-23 cells by reverse transcription-polymerase chain reaction (RT-PCR) analysis. Collagen type I (Col I), osteocalcin (OC), and dentin sialophosphoprotein (DSPP) expression was decreased after inactivation of NFI-C. However, bone sialoprotein (BSP) expression was dramatically increased after inactivation of NFI-C. ALP and DMP4 expression was not changed after inactivation of NFI-C. The expression of alkaline phoshatase (ALP) and dentin matrix protein 4 (DMP4) was increased after over-expression of NFI-C, while Col I, OC, DSPP, and BSP expression was decreased. These findings suggest that odontoblasts after loss of NFI-C lost the phenotype of odontoblasts and acquired those of osteoblasts.

• Polymer(Korea)
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• v.35 no.3
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• pp.244-248
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• 2011

Poly(2,6-dimethyl-1,4-phenylene ether) (PPE) was synthesized by oxidative polymerization using various Cu(I)-amine catalyst system. The effects of catalyst/monomer ratio, different amine ligand, and the content of 2,4,6-trimethylphenol (TMP) additive on the polymer yield and molecular weight were investigated by using gel permeation chromatography. The catalytic activity of various Cu-amine systems on the 2,S-dimethylphenol (DMP) polymerization was monitored and compared each other through oxygen-uptake experiment. In addition, the effect of catalyst removal using aqueous EDTA on the thermal stability of the prepared polymer was elucidated by thermogravimetric analysis.

• Elastomers and Composites
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• v.46 no.3
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• pp.257-261
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• 2011

We introduce a novel method that could modify neat asphalt. A polymer-forming monomer, dimethylphenol( DMP) was added to the neat asphalt and polymerization was occurred autonomously, without adding any external catalyst for the polymerization, only with oxygen molecules in the air. The polymer produced in the asphalt was polyphenyleneoxide( PPO) and it enhanced the mechanical properties of the asphalt. Compared with the neat asphalt, the tenacity and toughness of the DMP-modified asphalt were two and half times and three times high, respectively.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.1094-1097
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• 2005

It is issued that protecting and managing a copyright are very important to a digitization of multimedia contents. We analyze the trend of a multimedia service, IPMP(Intellectual Property Management and Protection), DMP(Digital Media Project), ENTHRONE(End-to-end Qos through Integrated Management of Content, Networks and Terminals), and DRM(Digital Rights Management). All of these techniques are for developing solution about protection and management of the copyright and media service. These have been at the head of the growth of the whole media service, but cause problems such as a illegal copy and distribution. To solve these problems, researchers are performing many projects.

• Journal of the Korean Society for Library and Information Science
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• v.53 no.3
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• pp.317-344
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• 2019

Increasing the value of data, paradigm shifts in research methods, and specific manifestations of open science indicate that research is no longer text-centric, but data-driven. In this study, we analyzed the services for DCC, ICPSR, ANDS and DataONE to derive key elements and functional requirements for research data management and services that are still insufficient in domestic research. Key factors derived include DMP writing support, data description, data storage, data sharing and access, data citations, and data management training. In addition, by presenting functional requirements to the derived key elements, this study can be applied to construct and operate RDM service in the future.

• Journal of Life Science
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• v.25 no.8
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• pp.936-941
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• 2015

The principal objective of this fundamental research was to analyze the physicochemical changes and sensory properties of Dolsan leaf mustard pickles (DMP) for the development of low-salt pickles in order to contribute to the diversification of food. The DMPs were stored at −2℃ for 90 days, with salinity maintained at 1.63% to 1.85%. The pH was decreased during storage, and the acidity was gradually increased for up to 60 days of storage, after which it was increased rapidly to 1.10. The L-values (lightness) from the stems were decreased during storage. The a-values (greenness) were increased, while the b-values (yellowness) were decreased. It was shown that the DMP had a progressive browning phenomenon and the number of lactic acid bacteria gradually decreased. The sensory evaluation showed that crunchy textures were decreased and touch textures were increased at 30 days. Therefore, Dolsan leaf mustard is suitable as a material for low-salt pickles during storage for 90 days. The results of the analysis of the physicochemical and sensory properties indicate that the optimal storage for DMP was maintained for up to 30 days.