• Title, Summary, Keyword: BIS

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LORETA analysis of EEG responding to positive/negative emotional stimuli for different sensitivities of behavioral activation and inhibition systems (긍/부정 감성자극에 대한 행동활성화체계 및 행동억제체계 민감도에 따른 뇌파의 LORETA 분석)

  • Kim Wuon-Shik;Jin Seung-Hyun
    • Science of Emotion and Sensibility
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    • v.8 no.4
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    • pp.403-413
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    • 2005
  • The purpose of the present study was to investigate the responses to positive/negative emotional stimuli for the different sensitivities of behavioral activation system (BAS) and behavioral inhibition system (BIS). We recorded If-channel EEG data for 8 BAS sensitive subjects an48 BIS sensitive subjects. EEGs were analyzed with LORETA (Low-resolution electromagnetic tomography) From scalp-recorded electrical potential distribution, LORETA computes the three-dimensional intracerebral distributions of current density for specified EEG frequency bands. hs results , significant differences between the BAS sensitive group ant the BIS sensitive group appeared LORETA alpha activities over the prefrontal lobe and the cingulate gyrus. Prefrontal regions and limbic system including cingulate gyrus are involved in emotional processing. Moreover, subjects with the high BAS sensitivity. responded more sensitively to the positive stimulation than subjects with the high BIS sensitivity. Therefore, our results suggest the possibility of correlation between BAS/BIS sensitivity and positive/negative emotional stimuli.

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Efficient Enantioselective Synthesis of (R)-[3,5-Bis(trifluoromethyl)phenyl] Ethanol by Leifsonia xyli CCTCC M 2010241 Using Isopropanol as Co- Substrate

  • Ouyang, Qi;Wang, Pu;Huang, Jin;Cai, Jinbo;He, Junyao
    • Journal of Microbiology and Biotechnology
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    • v.23 no.3
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    • pp.343-350
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    • 2013
  • (R)-[3,5-Bis(trifluoromethyl)phenyl] ethanol is a key chiral intermediate for the synthesis of aprepitant. In this paper, an efficient synthetic process for (R)-[3,5- bis(trifluoromethyl)phenyl] ethanol was developed via the asymmetric reduction of 3,5-bis(trifluoromethyl) acetophenone, catalyzed by Leifsonia xyli CCTCC M 2010241 cells using isopropanol as the co-substrate for cofactor recycling. Firstly, the substrate and product solubility and cell membrane permeability of biocatalysts were evaluated with different co-substrate additions into the reaction system, in which isopropanol manifested as the best hydrogen donor of coupled NADH regeneration during the bioreduction of 3,5-bis(trifluoromethyl) acetophenone. Subsequently, the optimization of parameters for the bioreduction were undertaken to improve the effectiveness of the process. The determined efficient reaction system contained 200mM of 3,5-bis(trifluoromethyl) acetophenone, 20% (v/v) of isopropanol, and 300 g/l of wet cells. The bioreduction was executed at $30^{\circ}C$ and 200 rpm for 30 h, and 91.8% of product yield with 99.9% of enantiometric excess (e.e.) was obtained. The established bioreduction reaction system could tolerate higher substrate concentrations of 3,5- bis(trifluoromethyl) acetophenone, and afforded a satisfactory yield and excellent product e.e. for the desired (R)-chiral alcohol, thus providing an alternative to the chemical synthesis of (R)-[3,5-bis(trifluoromethyl)phenyl] ethanol.

Characteristics of Dental Restorative Composite Resins Prepared from 2,2-bis- [4- (2-hydroxy-3-rnethacryloyloxy propoxy) phenyl] propane Derivatives and Spiro Orthocarbonate (2,2-비스[4-(2-하이드록시-3-메타크릴로일옥시프로폭시)페닐] 프로판 유도체와 스파이로 오쏘카보네이트가 포함된 치아 수복재의 특성)

  • Kim Yong;Lee Juyeon;Park Kwangyong;Kim Chang Keun;Kim Ohyoung
    • Polymer Korea
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    • v.28 no.5
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    • pp.426-432
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    • 2004
  • To reduce volumetric shrinkage of the commercially available polymeric dental composite during curing reaction, (2,2-bis [4-(2-hydroxy-3-methacryloyloxy propoxy) phenyl] propane) (bis -GMA) derivatives, i.e., (2,2-bis[3-methyl, 4-(2-hydroxy-3-methacryloyloxy propoxy) phenyl] propan) (DMBis-GMA) and (2,2-his [3,5-dimethyl ,4- (2-hydroxy-3-methacryloyloxy propoxy) phenyl] propane) (TMBis-GMA) were synthesized and then new dental composite resin composed of Bis-GMA derivatives, diluent, spiro orthocarbonate (SOC), and inorganic filler was produced. Among the Bis-GMA derivative/Bis-GMA derivative/diluent mixtures, Bis-GMA/ TMBis-GMA/TEGDMA mixture exhibited the lowest volumetric shrinkage. Volumetric shrinkage of this mixture was further reduced by adding SOC. Volumtric shrinkage of dental composite prepared from commercially available resin monomer mixture was $2.5\%$, while that prepared from resin monomer mixture having minimum volumetric shrinkage was reduced to $0.7\%$. Mechanical strength of this dental composite was nearly the same with that of commercial products but the time required for the curing reaction was retarded.

Research about a structure system of the bus information system which is applied to the bus stop - Around a problem and preference of Pusan bus information system investigation - (버스정류장에 적용된 버스정보시스템의 구성 체계에 관한 연구 - 부산시 버스정보시스템의 문제점 및 선호도 조사를 중심으로 -)

  • Cha Min-Jun;Hong Kwan-Seon
    • Archives of design research
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    • v.19 no.4
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    • pp.61-70
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    • 2006
  • The functions and roles in the various fields of modern society are changing into the unified and multiplex structure, which is simultaneous and virtual communication environments beyond physical space and time, by the digital IT technology. The urban traffic system is also being intellectualized in order to solve urban traffic problems and convenient services by using digital IT technology. The bus, which is the one of the most common public transportation, are suffering in the decrease of bus service quality and the bus passengers rate because of the development of other public transportation systems such as the subway and electric railway and by rapidly increasing private cars. By recognizing these problems, many domestic and overseas cities are promoting to introduce the Bus Information System (BIS) to improve service quality of buses through the intelligent traffic system. According to the construction of this new information system called the Bus Information System (BIS), the new bus stop configuration system and design plans are being required to solve the existing bus stop information system. Therefore, this research was conducted to suggest an effective BIS configuration system plan and synthetic design goals based on the investigation the problems of the information system and the BIS configuration system for Busan city. Also, this research are conducted the below actions as follows: First, the literature survey was conducted, such as theoretical documents on the bus stop and the Bus Information System(BIS), Also, the design trend of the BIS was examined through domestic and overseas BIS cases studies. Scondly, the problems related to the information system in Busan city bus stops were investigated to investigate the present state and problems of the Bus Information System (BIS). Finally, as a result of this research, the effective BIS configuration system plan and design approach methods of bus stops were proposed for by Busan city based on the above investigation results.

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Carbonylation of 1-Bromo-2,6-bis(bromomethyl)benzene Catalyzed by Cobalt Carbonyl

  • Sang Chul Shim;Shin Ae Chae;Dong Yeob Lee;Young Zoo Youn;Jae Goo Shim;Chil Hoon Doh
    • Bulletin of the Korean Chemical Society
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    • v.14 no.4
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    • pp.481-485
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    • 1993
  • Dialkyl 1-bromobenzene-2,6-diacetates were easily prepared by the carbonylation of the moiety of benzylic bromide in 1-bromo-2,6-bis(bromomethyl)benzene with alcohol in the presence of NaOAc< TEX>${\cdot}$3H$_2$O and a catalytic amount of Co$_2$(CO)$_8$under the atmospheric pressure of carbon monoxide at room temperature in excellent yield. Alkyl 2,6-bis(alkoxymethyl)benzoates were obtained by the carbonylation of the moiety of aryl bromide in 1-bromo-2,6-bis(alkoxymethyl)-benzene, which derived from 1-bromo-2,6-bis(bromomethyl)benzene, alcohol, NaOR, and CH$_3$I under the same conditions. Alkyl 2,6-bis(carboxymethyl)benzoate was also obtained in a trace amount for 24 hrs at room temperature.

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Synthesis and Antioxidant Activities of 1, 2-bis(aminoacyl) hydrazine derivatives (1, 2-bis(aminoacyl)hydrazine 유도체들의 합성과 항산화 효과)

  • Kang, Shin-Won;Lee, Sang-Un;Shin, Hong-Dae
    • Journal of the Korean Applied Science and Technology
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    • v.3 no.1
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    • pp.43-47
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    • 1986
  • 1.2-bis(aminoacyl)hydrazine derivatives and dipeptides were synthesized by conventional peptide synthesis procedures. Their antioxidant activity were inverstigated by over-storage test using corn oil as substrte. 1.2-bis (aminoacyl) hydrazine derivatives and dipetides containing hydrophobic side chain amino acid showed higher antioxidant activity. A free N-terminal amino group was also found to be important for the appearance of antioxidant activity. 1.2-bis (aminoacyl) hydrazine derivatives showed higher antioxidant activity than dipeptides. Antimicrobial activites of dipeptides and 1.2-bis (aminoacyl) hydrazine derivatives were also examined by the paper disc method. All of these compounds had shown no antimicrobial activity.

Effect of Chain Extenders on Carboxyl End Group of Polyester (쇄연장제가 폴리에스테르의 카르복실 말단기에 미치는 영향)

  • 김학용;은용수;조성호
    • Textile Science and Engineering
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    • v.36 no.4
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    • pp.267-273
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    • 1999
  • Polyester was melt-blended with three kinds of chain extenders 2,2-bis-oxazoline (Bis1), 1,3-phenylene-bis-2-oxazoline (Bis2), and polycarbodiimide (PCBI), which can react with carboxyl end group of polyester. The effects of chain extender content and mixing time on the carboxyl end group content, intrinsic viscosity and cold crystallization temperature of polyester were investigated. When less than 1.0 wt% of Bis1 was added, the carboxyl end group concentration decreased below 10 meq/kg. For the Bis2 concentration of less than 1.0 wt%, the carboxyl end group concentration was between 18~49 meq/kg. When more than 1.5 wt% of PCBI was added, the carboxyl end group concentration decreased below 10 meq/kg. The intrinsic viscosity increased and carboxyl end group concentration decreased with increasing PCBI content.

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A Study for Communication Mode of Bus Information System (버스안내정보시스템(BIS) 통신방식 도입에 관한 연구)

  • Lee, Young-Woo
    • Journal of the Korean Society of Industry Convergence
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    • v.10 no.4
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    • pp.241-248
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    • 2007
  • It is recently trend that local government which introduce the BIS is increasing steadily. Communication is inevitably necessary to offer a data of a collected bus position to transportation center and supply construed information. Until now, most BIS connection research is actively in data of collecting, processing, offer but Research is Relatively insufficient on communication mode to connect it. Therefore, this study is achieving applicable communication mode on BIS of present common use inning that communication mode. Study resulting, characteristic of BIS communication mode is analyzed that send-receive of short packet data happens frequently and It is inevitably necessary to synthetically analyze economical side, authoritativeness side of communication, introducing communication mode.

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A Design and Implementation of SMTPUTF8 Mail Server to Support EAI(E-Mail Address Internationalization) bis Standard (EAI(E-Mail Address Internationalization) bis 표준을 지원하는 SMTPUTF8 메일 서버의 설계 및 구현)

  • Han, Dongyun;Kim, Kyongsok
    • Journal of Information Technology Services
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    • v.12 no.2
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    • pp.321-334
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    • 2013
  • Recently EAI WG of IETF has published standards for multilingual support in the local part of the e-mail address. Between 2009 and 2010, EAI WG published RFC documents, called the EAI standard, extension to the existing mail-related RFC documents, and EAI has been implemented and tested. In the course of reviewing the results, this yielded a proposal to modify the EAI standard. As a result, EAI WG has published modified RFC documents, called the EAI bis standard. SMTPUTF8 mail server described in this paper has been implemented according to the EAI bis standard. In addition, it has the ability to support two different standards to support the multilingual domain part of the e-mail address, IDNA and EAI bis. Futhermore, SMTPUTF8 mail server can encode in punycode the local part of the e-mail address. Finally, interoperability testing shows that SMTPUTF8 mail server is well-implemented according to the EAI bis standard.

Physical properties of composite resins for dental restorative (치과 수복재용 복합레진의 물리적 특성에 대한 연구)

  • Kim, Ji Yeob;Lee, Kwang-Rae
    • Journal of Industrial Technology
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    • v.35
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    • pp.35-39
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    • 2015
  • One of the purposes of the study was to investigate and compare the physical properties(depth of light cure, degree of conversion, water absorption) of 4 kinds of composit resins prepared in this lab; Bis-GMA based, Bis-EMA based, Bis-GMA/UDMA based, and Bis-EMA/UDMA based composit. Another aim was to compare the physical properties of the composit resins with those of the commercialized products(Charmfil flow(Denkist), Quadrant flow(CAVEX)) in market. All of the composit resins and the commercialized products showed almost same values of the physical properties. It was found that all of the composit resins prepared in this lab satisfied the physical properties specified in ISO 4049.

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