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Southeast Asian Foot-and-Mouth Disease Viruses in Eastern Asia
Knowles, Nick J.,He, JiJun,Shang, Youjun,Wadsworth, Jemma,Valdazo-Gonzá,lez, Begoñ,a,Onosato, Hiroyuki,Fukai, Katsuhiko,Morioka, Kazuki,Yoshida, Kazuo,Cho, In-Soo,Kim, Su-Mi,Park, Jong-Hye Centers for Disease Control and Prevention 2012 Emerging infectious diseases Vol.18 No.3
<P>Foot-and-mouth disease (FMD) outbreaks recently affected 2 countries (Japan and South Korea) in eastern Asia that were free of FMD without vaccination. Analysis of viral protein 1 nucleotide sequences indicated that FMD serotype A and O viruses that caused these outbreaks originated in mainland Southeast Asia to which these viruses are endemic.</P>
Phosphate Based Glasses for Hard and Soft Tissue Surgery
Jonathan C Knowles 대한치과재료학회 2011 대한치과기재학회 학술대회 Vol.2011 No.5
As with all glasses, phosphate based glasses offer a rich and diverse chemistry however the phosphate system offers the unique property of complete degradability. This coupled with the ability to alter the degradation rate over several orders of magnitude allow tailoring of the properties to suit a particular application. Considering the potential biomedical applications the structure of these glasses is poorly defined, but with the application of a range of advanced probes such as NMR, EXAFS and XANES, the structure is now more clearly understood. In particular doping of glasses has given an indirect way to determine the structure of the glasses. These dopants have also given rise to an understanding of the effect of trace elements on cell behaviour. More recently, developments in sol-gel synthesis have allowed compositions to be obtained, not normally attainable via traditional melt quenched routes and have also opened up the possibility of the use of phosphate based glasses for drug delivery applications.
Dispersion forces at planar interfaces in anisotropic ceramics
K.M. Knowles 한양대학교 세라믹연구소 2005 Journal of Ceramic Processing Research Vol.6 No.1
Calculations are presented for the magnitude of the dispersion forces at rutile − vacuum − rutile, rutile − silica − rutile and rutile − water − rutile planar interfaces for the non-retarded limit. The calculations for rutile − vacuum − rutile and rutile − silica − rutile predict values of the Hamaker constant close to those determined through full spectral calculations using experimentally-determined interband transition strengths. However, subtle differences between these two approaches emerge when predicting trends in the Hamaker constant as a function of the orientation of the anisotropic rutile grains.
D. M. Knowles,D. W. MacLachlan 한국물리학회 2004 Current Applied Physics Vol.4 No.2-4
A crystal slip system model has been developed for the analysis of gas turbine single crystal Ni-base superalloys and has beenimplemented in nite element analysis software using the established theory of crystal plasticity. The model incorporates many ofthe dominant deformation mechanisms seen in these high temperature materials, which have been determined from mechanical testing and microscopic analysis. In particular slip is considered on the {111}<011> and {111}<112>slip systems, the former aredenoted type I systems and the latter type II. Type I systems are dominant at high temperature in orientations close to [001], in other orientations or at lower temperatures (700800.C) type II systems become active. When the type II systems are activated theygive rise to signicant transient creep strains at low temperature, which can be more than 5-6% in magnitude.
Charles Huggins,Richard D. Robinson,Heidi Knowles,Heidi Knowles,Rosalia Mbugua,Jessica Laureano-Phillips,Chet D. Schrader,Nestor R. Zenarosa,Hao Wang 대한응급의학회 2019 Clinical and Experimental Emergency Medicine Vol.6 No.2
Objective A common emergency department (ED) patient care outcome metric is 72-hour ED return visits (EDRVs). Risks predictive of EDRV vary in different studies. However, risk differences associated with related versus unrelated EDRV and subsequent EDRV disposition deviations (EDRVDD) are rarely addressed. We aim to compare the potential risk patterns predictive of related and unrelated EDRV and further determine those potential risks predictive of EDRVDD.Methods We conducted a large retrospective observational study from September 1, 2015 through June 30, 2016. ED Patient demographic characteristics and clinical metrics were compared among patients of 1) related; 2) unrelated; and 3) no EDRVs. EDRVDD was defined as obvious disposition differences between initial ED visit and return visits. A multivariate multinomial logistic regression was performed to determine the independent risks predictive of EDRV and EDRVDD after adjusting for all confounders. Results A total of 63,990 patients were enrolled; 4.65% were considered related EDRV, and 1.80% were unrelated. The top risks predictive of EDRV were homeless, patient left without being seen, eloped, or left against medical advice. The top risks predictive of EDRVDD were geriatric and whether patients had primary care physicians regardless as to whether patient returns were related or unrelated to their initial ED visits. Conclusion Over 6% of patients experienced ED return visits within 72 hours. Though risks predicting such revisits were multifactorial, similar risks were identified not only for ED return visits, but also for return ED visit disposition deviations.
Nissen, Mark S,Kumar, G N Mohan,Youn, Buhyun,Knowles, D Benjamin,Lam, Ka Sum,Ballinger, W Jordan,Knowles, N Richard,Kang, Chulhee American Society of Plant Physiologists 2009 The Plant cell Vol.21 No.3
<P>Potato (Solanum tuberosum) multicystatin (PMC) is a crystalline Cys protease inhibitor present in the subphellogen layer of potato tubers. It consists of eight tandem domains of similar size and sequence. Our in vitro results showed that the pH/PO(4)(-)-dependent oligomeric behavior of PMC was due to its multidomain nature and was not a characteristic of the individual domains. Using a single domain of PMC, which still maintains inhibitor activity, we identified a target protein of PMC, a putative Cys protease. In addition, our crystal structure of a representative repeating unit of PMC, PMC-2, showed structural similarity to both type I and type II cystatins. The N-terminal trunk, alpha-helix, and L2 region of PMC-2 were most similar to those of type I cystatins, while the conformation of L1 more closely resembled that of type II cystatins. The structure of PMC-2 was most similar to the intensely sweet protein monellin from Dioscorephyllum cumminisii (serendipity berry), despite a low level of sequence similarity. We present a model for the possible molecular organization of the eight inhibitory domains in crystalline PMC. The unique molecular properties of the oligomeric PMC crystal are discussed in relation to its potential function in regulating the activity of proteases in potato tubers.</P>