Silver-Gold Bimetallic Nanoparticles and Their Applications as Optical Materials

Boote, B.W.,Byun, H.,Kim, J.-H. American Scientific Publishers 2014 Journal of nanoscience and nanotechnology Vol.14 No.2

Recently, nanoscale metallic particles have been studied extensively due to their tunable and strong optical properties that are well beyond those of organic chromophores. As monometallic nanoparticles have shown strong but narrow absorption bands within the ultraviolet and visible wavelengths, the preparation of bimetallic core-shell structures can give rise to strong, wide, and tunable absorption bands across the visible to near infrared areas. The silver-gold bimetallic nanoparticles with core-shell structures can offer unique physical and optical properties inaccessible to monometallic systems. These nanoparticles have been utilized in many areas of research including chemical catalysis, surface-enhanced Raman spectroscopy, and photothermal therapy. This review article is a comprehensive overview of bimetallic nanoparticle systems consisting of gold and silver; it is based on the recent advances in wet-chemical synthetic methodologies, the characterization of size and shape-dependent optical properties, and various optically driven applications including catalysis, signal-enhancing devices, and biomedical purposes.

The Processes of Listening and Factors That Affect Selecting of Listening Activities

( Jonathan Boot ) 21세기영어영문학회 2005 영어영문학21 Vol.18 No.2

Yi T’oegye and Japan

W.J. BOOT The Academy of Korean Studies 1982 Korea Journal Vol.22 No.2

일반논문 : 동아시아 연구의 새로운 방향

( W. J. Boot ) 성균관대학교 대동문화연구원 2015 大東文化硏究 Vol.92 No.-

본 논문은 근대 초 일본 사상사에 대한 연구를 통해 도달한 몇 가지 결론을 논증한 것이다. 중점적으로 논의한 사항은 (1)지역연구 방법론과 언어 연구의 중요성, (2)동아시아 문화권역의 맥락에서 모든 현상에 대한 연구의 필요성, (3)``지식 체계``개념을 통한 연구방법론의 장점에 관한 것이다. 첫 번째로 고려해야 할 점은, 만약 외국 문화의 어떤 요소를 연구하려 한다면 그 자체의 맥락에서 그 요소의 위상을 파악하고 자료를 읽어낼 수 있도록 외국 문화와 그에 필요한 언어에 대한 일반적인 지식을 습득해야 한다는 것이다. 두 번째로 고려할 점은 19세기 중반까지 일본이 모든 면에서 중국 문화의 정전(canon)에 지대한 영향을 받았다는 것이다. 이러한 점들을 인지하고 영향 관계를 탐색할 수 있어야 한다. 세 번째로는 근대 초 일본에서 지적·예술적 시도가 이루어졌던 장이 근대 분과학문과는 다른 방식으로 구분되었다는 점이다. ``지식 체계``는 이러한 함정을 피할 수 있는 방법론을 제공한다. In this article I argue a number of conclusions that I have reached in the course of my research in the history of thought of early-modern Japan, which is my special field of expertise. The points I touch upon are (1) the area studies approach and the importance of language studies; (2) the necessity of studying all phenomena in the context of the East-Asian cultural sphere; (3) the advantages of the "knowledge system" approach. Ad 1: If one wants to study any element of an alien culture, one has to acquire a general knowledge of that culture and of the requisite language(s), in order to be able to locate that element in its own context and to do read the sources. Ad 2: Until the middle of the 19th century Japan was in all respects heavily influenced by the canon of Chinese culture. One should be aware of this, and be able to trace these influences. Ad 3: The field of intellectual and artistic endeavour in early-modern Japan was divided differently from the modern academic disciplines; "knowledge systems" provides an approach that makes it possible to avoid this pitfall.

- 주제발표 6 - 근세유학과 퇴계학 국제학술회의 ; 퇴계학과 일본

W . J . Boot,김용환 (譯) 퇴계학연구원 1981 退溪學報 Vol.31 No.1

Thermal Modelling of Power Modules

D.Silber,R.Boot,C.Reinermann 전력전자학회 1992 ICPE(ISPE)논문집 Vol.1992 No.4

Power modules and smart power devices require sophisticated thermal modelling to take into account thermal interactions, time dependent response of temperature sensors and electrical-thermal coupling. In spite of the availability of powerful software for FEM calculations, analytical methods are still useful to obtain approximations, and thermal networks allow simple combinations of electrical and thermal behaviour. For calculations of temperatures under very different load conditions, the use of system functions will be the most efficient way.<br/>

Nonlinear numerical modelling for the effects of surface explosions on buried reinforced concrete structures

Nagy, N.,Mohamed, M.,Boot, J.C. Techno-Press 2010 Geomechanics & engineering Vol.2 No.1

The analysis of structure response and design of buried structures subjected to dynamic destructive loads have been receiving increasing interest due to recent severe damage caused by strong earthquakes and terrorist attacks. For a comprehensive design of buried structures subjected to blast loads to be conducted, the whole system behaviour including simulation of the explosion, propagation of shock waves through the soil medium, the interaction of the soil with the buried structure and the structure response needs to be simulated in a single model. Such a model will enable more realistic simulation of the fundamental physical behaviour. This paper presents a complete model simulating the whole system using the finite element package ABAQUS/Explicit. The Arbitrary Lagrange Euler Coupling formulation is used to model the explosive charge and the soil region near the explosion to eliminate the distortion of the mesh under high deformation, while the conventional finite element method is used to model the rest of the system. The elasto-plastic Drucker-Prager Cap model is used to model the soil behaviour. The explosion process is simulated using the Jones-Wilkens-Lee equation of state. The Concrete Damage Plasticity model is used to simulate the behaviour of concrete with the reinforcement considered as an elasto-plastic material. The contact interface between soil and structure is simulated using the general Mohr-Coulomb friction concept, which allows for sliding, separation and rebound between the buried structure surface and the surrounding soil. The behaviour of the whole system is evaluated using a numerical example which shows that the proposed model is capable of producing a realistic simulation of the physical system behaviour in a smooth numerical process.

친화크로마토그래프법을 이용한 Cerrena Unicolor Laccase의 정제특성 ( Purification of Extracellular Cerrena Unicolor Laccase by Means of Affinity Chromatography )

A.Leonowicz,L.Gianfreda,J.Rogalski,M.Jaszek,J.Luterek,M.W.Wasilewska,E.Malarczyk,A.Dawidowicz,M.Fink-Boots,G.Ginalska,조남석 한국펄프·종이공학회 1997 펄프.종이기술 Vol.29 No.4

CD70-expressing CD4 T cells produce IFN-γ and IL-17 in rheumatoid arthritis

Park, Jin Kyun,Han, Bobby Kwanghoon,Park, Ji Ah,Woo, Youn Jung,Kim, So Young,Lee, Eun Young,Lee, Eun Bong,Chalan, Paulina,Boots, Annemieke M.,Song, Yeong Wook Oxford University Press 2014 Rheumatology Vol.53 No.10

<P><B>Objective.</B> CD70-expressing CD4 T cells are enriched in RA and promote autoimmunity via co-stimulatory CD70-CD27 interaction. This study aimed to explore the phenotype and cytokine production of CD70<SUP>+</SUP> CD4 T cells in RA.</P><P><B>Methods.</B> Peripheral blood mononuclear cells from 32 RA patients were isolated and frequencies of CD70<SUP>+</SUP> cells within different CD4 T subsets were analysed using flow cytometry. IFN-γ and IL-17 production were compared between the CD70<SUP>+</SUP> and CD70<SUP>−</SUP> cells. Expression of master transcription factors T-bet, GATA3 and retinoic acid–related orphan receptor gamma t (RORγt) were examined by real-time PCR. Results are presented as mean (<SMALL>s.e.m</SMALL>.).</P><P><B>Results.</B> CD4 T cells of healthy controls rarely expressed CD70 as compared with CD4 T cells of RA patients [mean 0.9% (<SMALL>s.e.m</SMALL>. 0.3%) <I>vs</I> 7.6 (0.6), <I>P</I> < 0.001]. In RA, CD70<SUP>+</SUP> cells were present within all CD4 T cell subsets, i.e. CD45RA<SUP>+</SUP>CCR7<SUP>+</SUP> naive, CD45RA<SUP>−</SUP>CCR7<SUP>+</SUP> central memory, CD45RA<SUP>−</SUP>CCR7<SUP>−</SUP> effector memory and CD45RA<SUP>+</SUP>CCR7<SUP>−</SUP> terminally differentiated effector memory T cells with a mean frequency of 3.9% (<SMALL>s.e.m</SMALL>. 1.1%), 4.0 (0.5), 4.2 (0.7) and 9.4 (4.3), respectively. As compared to CD70<SUP>−</SUP> CD4 T cells, CD70<SUP>+</SUP> CD4 T cells produced significantly more IFN-γ and IL-17 after short activation. CD70<SUP>+</SUP> CD4 T cells preferentially expressed transcription factor RORγt.</P><P><B>Conclusion.</B> CD70<SUP>+</SUP> CD4 T cells are enriched in RA and may directly contribute to RA pathogenesis by producing IFN-γ and IL-17. Targeting CD70<SUP>+</SUP> CD4 T cells might offer new therapeutic opportunities in RA.</P>