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Public/Private Partnerships in Health in the UK:Theory and Practice
Priestley, Richard,Yoo, Wang-Keun 한국보건교육건강증진학회 1999 보건교육건강증진학회지 Vol.1 No.1
One of the most fundamental and the oldest issues in the provision of health care throughout the world has been the issue of the role of the public and private sector of health care, and the relationship between them. This paper describes issues associated with the concept of health oriented partnerships in the United Kingdom and seeks to contrast public and private partnerships both in health and in health care. In the United Kingdom it is suggested that health care is conceived by the population to equate to the National Health Service(NHS) with "add on" private health care far certain sectors of the community and within certain well defined clinical parameters. This paper can provide us with valuable information on the characteristics of UK health care systems, current health policies as well as issues relating to the public and private partnerships in health/ health care in the UK, thus offer important policy implications for the improvement of Korean health care system which lacks health-oriented coordinations and partnership between public and private sector very considerably.
Choi, S.H.,Chung, J.W.,Priestley, R.D.,Kwak, S.Y. Elsevier Scientific Pub. Co 2012 Journal of membrane science Vol.409 No.-
For the removal of endocrine disrupting chemicals (EDCs), such as di-(2-ethylhexyl) phthalate (DEHP), from drinking water, we prepared β-cyclodextrin included polysulfone (PSf/CD) hollow fiber membranes. β-Cyclodextrin (β-CD) was modified with fatty acid chlorides to produce amphiphilic β-CDs. PSf/CD hollow fiber membrane was prepared from polysulfone (PSf) dope solution with those amphiphilic β-CDs by phase inversion process. In the membrane formation process, the amphiphilic β-CDs migrated to the membrane surfaces via hydrophilic- and hydrophobic-mediated self-assembly. The performances of PSf/CD hollow fiber membranes were measured and the results showed that PSf/CD hollow fiber membranes can effectively remove DEHP from aqueous solutions and provided good water permeability.
Chung, Jae Woo,Guo, Yunlong,Priestley, Rodney D.,Kwak, Seung-Yeop Royal Society of Chemistry 2011 Nanoscale Vol.3 No.4
<P>We present a novel procedure for the formation of colloidal gold nanoparticles (<I>AuNPs</I>) derived from the supramolecular self-assembled structure of a cyclodextrin (<I>CD</I>)/Au salt complex (<I>SCA</I>) without the necessity for additional reducing or stabilizing agents. The <I>SCA</I> served as a solid template for the formation of gold seeds by <I>solid-state</I> thermal treatment within the confining environment of the <I>α-CD</I>, <I>i.e.</I>, the matrix of the <I>SCA</I>. Subsequently, thermally treated <I>SCA</I>, denoted as <I>T-SCA</I>, was placed (without further treatment) into an aqueous medium and gold seeds were nucleated for the formation of <I>α</I>-<I>CD</I>-stabilized <I>AuNPs</I> at room temperature. The surface topology of <I>SCA</I>, as revealed by field-emission scanning electron microscopy (FE-SEM), consisted of flaky plate-like structures. Wide angle X-ray diffraction (WXRD) revealed that the surface topology of <I>SCA</I> resulted from a transformation in the crystalline structure of <I>α-CD</I> from the cage-type to the hexagonally ordered channel-type. The structure transformation on the surface of <I>SCA</I> was attributed to the nucleated self-assembly of surface <I>α-CD</I> molecules by Au salt. From combined FE-SEM, energy-dispersed X-ray spectroscopy (EDXS), WXRD and differential scanning calorimetry (DSC) results, it was concluded that the thermal treatment of <I>SCA</I> led to the formation of gold seeds, attributed to the reduction and aggregation of some Au salt molecules, confined within the interface between the cage-type and channel type structure of the <I>SCA</I>. After placement of <I>T-SCA</I> into an aqueous solution, the growth and stabilization of <I>AuNPs</I> by <I>α-CD</I> were verified by UV-vis spectroscopy. The formation of <I>AuNPs</I>, by this novel method, can be considered a one step seed-mediated growth process. The resulting <I>AuNPs</I> are spherical in morphology, narrowly size distributed and possesses excellent stability. Furthermore, the <I>AuNPs</I> size is tunable by simply controlling water content during nanoparticle growth.</P> <P>Graphic Abstract</P><P>We present a novel procedure for the formation of size-variant colloidal gold nanoparticles (<I>AuNPs</I>) derived from the supramolecular self-assembled structure of a cyclodextrin (<I>CD</I>)/Au salt complex (<I>SCA</I>) without the necessity for additional reducing or stabilizing agents. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0nr00894j'> </P>
Confinement-Induced Change in Chain Topology of Ultrathin Polymer Fibers
Chung, Junho,Chung, Jae Woo,Priestley, Rodney D.,Kwak, Seung-Yeop American Chemical Society 2018 Macromolecules Vol.51 No.11
<P>Despite the several decades study of the confinement effect of the polymeric nanomaterials, how the confinement influences 1D polymeric fiber nanomaterials is little understood. Here, we report that confinement can render ultrathin polymeric fibers rigid. By observing the changes in the crystalline and amorphous morphologies of electrospun nylon-6 nanofibers with variations in diameter and shape, we reveal that their crystalline phase changes into highly packed, stable α phase when the diameter is smaller than 120 nm. In addition, the molecular motion of the amorphous chains is severely suppressed with decrease in nanofiber diameter, indicating that the amorphous chains are also closely packed, forming a rigid structure. Indeed, the change in chain topology by confinement suppressed the release of rhodamine B from the ultrathin nanofibers. These findings allow us new insights for the design and development of advanced 1D polymer nanomaterials.</P> [FIG OMISSION]</BR>
Chung, Jae Woo,Guo, Yunlong,Kwak, Seung-Yeop,Priestley, Rodney D. The Royal Society of Chemistry 2012 Journal of materials chemistry Vol.22 No.13
<P>Recently, we discovered that cyclodextrin (CD)-stabilized gold nanoparticles could be synthesized in an aqueous medium from a self-assembled supramolecular structure of CD and gold salt. We showed that the self-assembled structure of the CD complex induced by the gold salt acted as a solid template for the formation of nanoconfined gold seeds and that gold seeds grew into CD-stabilized gold nanoparticles in water without the necessity of other reducing or stabilizing agents. Here, we extensively investigate the supramolecular self-assembled structure of the CD/gold salt complex under various synthetic conditions, the mechanism of the <I>α</I>-CD-stabilized gold nanoparticles formation, and the processing parameters for controlling the size of gold nanoparticles. We demonstrate that gold salts were confined between two different crystalline phases of the supramolecular CD solid template <I>via</I> a gold salt-induced molecular self-assembly process and that thermal treatment of the CD/gold salt complex led to the formation of nanosized gold seeds geometrically confined within the crystalline interface region. Placement of the thermally treated complex in water without the addition of any supplementary additives proliferated the growth of CD-stabilized gold nanoparticles <I>via</I> stabilization of the growing gold seed intermediates by CD molecules. In addition, various processing parameters such as Au salt concentration are shown to affect the size of AuNPs.</P> <P>Graphic Abstract</P><P>We investigate a synthetic procedure for the formation of size-variant colloidal gold nanoparticles (AuNPs) derived from the supramolecular self-assembled structure of a natural cyclodextrin (CD)/Au salt complex (CAT) without the necessity for additional reducing or stabilizing agents. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2jm16118d'> </P>