A Stabilizing Agent, PCA/DTPA, Improves Plasma Storage Life for the Chromsystems Vitamin C Assay up to Six Months

Collie Jake TB,Hudson Elizabeth P,Deane Adam M,Bellomo Rinaldo,Greaves Ronda F 대한진단검사의학회 2021 Annals of Laboratory Medicine Vol.41 No.4

The commonly used Chromsystems vitamin C (ascorbate) assay (Munich, Germany) has a sample storage life of five days at –20°C. Stabilizing agents have been successfully used to increase longevity; however, their suitability with this commercial assay is unclear. We investigated the compatibility of a stabilizing agent, perchloric acid/diethylenetriaminepentaacetic acid (PCA/DTPA), with the Chromsystems assay. Plasma was stored at –80°C, with or without PCA/DTPA. Storage up to six months was assessed through baseline and repeat analyses, stability was assessed by comparing paired non-stabilized and PCA/DTPA-stabilized plasma, and performance was assessed using allowable performance specifications of an external quality assurance program. Ascorbate concentration was significantly lower in non-stabilized plasma than in paired PCA/DTPA-stabilized plasma, with a proportional difference of 11% (P=0.01). All storage analysis results were within the allowable performance specifications. Storage at –80°C prevented plasma ascorbate oxidation; however, substantial oxidation occurred during sample processing. In conclusion, PCA/DTPA significantly reduces ascorbate oxidation, and PCA/DTPA-stabilized ascorbate plasma is compatible with the Chromsystems assay and stable for up to six months, when stored at –80°C.

Strategic Trade Policy under Integrateed Markets

Collie, David R.,Hviid, Morten,Kendall, Toby 세종대학교 국제경제연구소 1999 Journal of Economic Integration Vol.14 No.4

A model of strategic trade policy under integrated markets is presented and optimal trade policies are derived under assumptions of both complete and incomplete information. With the assumption of complete information it is shown that the optimal policy is an import tariff (export subsidy) when a country is a net importer (exporter). In the Nash equilibrium in trade policies the low cost country gives an export subsidy which is fully incomplete information about costs adds an incentive for both governments to use their trade policy as a signal of their firm's costs. This signaling effect increases the export subsidy and decreases the import tariff. In the simultaneous signaling game, with symmetry, the expected welfare in the separating equilibrium is higher than under free trade for both countries. (JEL Classifications: F12, F13, L13)

DELEGATION AND STRATEGIC TRADE POLICY

COLLIE, DAVID R. 한국국제경제학회 1997 International Economic Journal Vol.11 No.3

Immiserizing Growth and the Metzler Paradox in the Ricardian Model

David Collie 한국국제경제학회 2012 International Economic Journal Vol.26 No.1

Conditions for the occurrence of immiserizing growth and the Metzler paradox are analysed in the Ricardian model when consumers in the foreign country have Leontief preferences while consumers in the home country have Cobb-Douglas preferences. By using specific functional forms, the conditions for the occurrence of the two paradoxes are defined in terms of the exogenous parameters of the model rather than endogenous variables such as the foreign import demand elasticity in the conditions of Bhagwati (1958)1. Bhagwati , J. N. 1958 . Immiserizing growth: a geometrical note . Review of Economic Studies , 25 : 201 – 205 . [CrossRef], [Web of Science ®]View all references and Metzler (1949a8. Metzler , L. A. 1949a . Tariffs, the terms of trade and the distribution of national income . Journal of Political Economy , 57 : 1 – 29 . [CrossRef], [Web of Science ®]View all references, b9. Metzler , L. A. 1949b . Tariffs, international demand, and domestic prices . Journal of Political Economy , 57 : 345 – 351 . [CrossRef], [Web of Science ®]View all references). It is shown that the simultaneous occurrence of both paradoxical results is possible for some parameter values.

Strategic Trade Policy under Integrated Markets

( David R. Collie ),( Morten Hviid ),( Toby Kendall ) 세종대학교 경제통합연구소 (구 세종대학교 국제경제연구소) 1999 Journal of Economic Integration Vol.14 No.4

A model of strategic trade policy under integrated markets is presented and optimal trade policies are derived under assumptions of both complete and incomplete information. With the assumption of complete information it is shown that the optimal policy is an import tariff (export subsidy) when a country is a net importer (exporter). In the Nash equilibrium in trade policies the low cost country gives an export subsidy which is fully countervailed by the import tariff of the other country. The introduction of incomplete information about costs adds an incentive for both governments to use their trade policy as a signal of their firm`s costs. This signalling effect increases the export subsidy and decreases the import tariff. In the simultaneous signalling game, with symmetry, the expected welfare in the separating equilibrium is higher than under free trade for both countries. (JEL Classifications: F12, F13, L13)

Dimensional Stability of Single Jersey Fabrics of $LincLITE^{\circledR}$ and Conventional Yarns. II. Fabric Dimensional Changes

Park, Shin-Woong,Collie, Stewart,Herath, C.N.,Kang, Bok-Choon,An, Jae-Sang The Korean Fiber Society 2007 Fibers and polymers Vol.8 No.1

Dimensional changes of single jersey fabrics made from $LincLITE^{(R)}$ and conventional yarns(39 tex and 48 tex) with different twist factors and fabric tightness factors are investigated under dry-, steam- and full- relaxation treatments. Results showed that linear and area shrinkages, fabric density and stitch density values were affected by tightness factors, relaxation treatment, yarn twist and feeder blending. Generally, higher length shrinkages and width increases were reported with $LincLITE^{(R)}$ and conventional fabrics. Tightness factors and twist factors significantly affected $LincLITE^{(R)}$ and insignificantly affected conventional fabrics in concern of change of shape and area shrinkages. Thus, fabric density values and reciprocal of stitch lengths showed linear correlations with intercepts, which decreased on full relaxation. Also, it showed higher regression correlation coefficient factors from $LincLITE^{(R)}$ and conventional fabrics.

What’s new in dermatopathology 2023: WHO 5th edition updates

Ho Jonathan,Chico J Collie 대한병리학회 2023 Journal of Pathology and Translational Medicine Vol.57 No.6

The 5th edition WHO Classification of Skin Tumors (2022) has introduced changes to nomenclature and diagnostics. Important differences are discussed below. Changes in each category of skin tumor have been detailed, with particular emphasis on meaningful advances in our understanding of the molecular pathogenesis of the skin’s diverse tumor landscape.

Dimensional Stability of Single Jersey Fabrics of $LincLITE^{(R)}$ and Conventional Yarns. I.

Park, Shin-Woong,Collie, Stewart,Herath, C.N.,Kang, Bok-Choon The Korean Fiber Society 2006 Fibers and polymers Vol.7 No.4

Dimensional constants (k values) of single jersey fabrics made from $LincLITE^{(R)}$ and conventional yams are calculated under dry, steam, full relaxation treatments. Fabrics were made under different tightness factors such as high, medium and low with different twist factors, twist directions and feeder blending. $LincLITE^{(R)}$ yarns made to get soft and bulkier effects with yam count of 39 tex and conventional yams made into 39 tex and 48 tex yam counts. Various effects on K values are analysed using correlation coefficients. K-values are increased with relaxation progression and have shown some differences between in $LincLITE^{(R)}$ and conventional fabrics, and feeder blended fabrics. Loop shape factor is highly affected by tightness factor, relaxation and feeder blending in $LincLITE^{(R)}$ fabrics, whereas twist factor not significantly effects on loop shape factor in conventional fabrics. Stitch density significantly increases with relaxation in conventional fabrics and no significant effect shows with $LincLITE^{(R)}$ fabrics.

The Characteristics of Accepted Work-related Injuries and Diseases Claims in the Australian Coal Mining Industry

Chong, Heng T.,Collie, Alex Occupational Safety and Health Research Institute 2022 Safety and health at work Vol.13 No.2

Background: Coal mining is a hazardous industry. The purpose of the study is to identify the nature of occupational injuries and diseases among coal miners and to determine the factors that affect the rate of injury and duration of time loss from work. Methods: A retrospective cohort study was conducted using accepted workers' compensation claims data of 30,390 Australian coal miners between July 2003 and June 2017. Results: Musculoskeletal and fracture conditions accounted for approximately 60% of claims in all occupational groups. Cox regression analysis showed that older age and female gender were significant predictors of longer time off work. Injury types and occupations were associated with work time loss: mental health conditions, and machine operators and drivers had significantly longer durations of time off work. Conclusion: Future research can further address how these factors led to longer time off work so that coal industry regulators, employers, and healthcare providers can target interventions more effectively to these at-risk workers.

Polydopamine Treated and PEDOT:PSS Coated Wash Durable Conductive Textiles for Wearable Applications

G. M. Nazmul Islam,M. Azam Ali,Stewart Collie 한국섬유공학회 2022 Fibers and polymers Vol.23 No.4

Fabrication of wash durable conductive textiles are one of the most critical issues for the production of wearableconductive textiles. Here, this manuscript has reported on a low-cost, and simple sensor fabrication method for producingelectronically conductive textiles. Polydopamine (PODA) treated and untreated 100 % cotton plain woven fabrics were madeelectrically conductive with a mixture of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) andethylene glycol (EG) (70:30) solution through a dip-coating process. Strongly adhering the PEDOT:PSS and ethylene glycolcoating yielded a low resistance of 278 Ω/sq for the coated fabrics without significant mechanical degradation. Fouriertransform infrared spectroscopy (FTIR) studies revealed interactions between the cotton fibers and PEDOT:PSS. The coatedfabrics were characterized by Scanning Electron Microscope (SEM). SEM imaging of the PEDOT:PSS:EG coated fabricsrevealed slight texturing to the fibres due to the coating on PODA treated fabrics compared to the untreated coated fabrics. The PODA treated conductive cotton fabrics exhibited great durability against repeated multiple washing cycles. The tensilestrength and mechanical properties of the conductive fabrics were also evaluated. Ageing effects of the conductive fabricswas also analyzed. Electrical resistance of the untreated fabrics increased by 51 % in 5 weeks compared to PODA treatedfabrics due to controlled ageing under storage conditions. It is expected that the PEDOT:PSS:EG coated conductive fabricsfabricated by this process can be applied for healthcare applications.