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Finnegan P, Porter E, Bourke J. Skin reactions associated with glucose monitoring devices. Ir Med J 2024; 117:942. [PMID: 38682671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2024]
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Rafferty S, Byrne B, Goh A, Porter E, Lynch M, Ahmad K, O'Brien J, Field S. Radiological staging and surveillance imaging of high risk cutaneous malignant melanoma in the Mid-West of Ireland. Ir Med J 2023; 116:868. [PMID: 38258702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/24/2024]
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Mumaw D, Porter E, Vu C, Fuentes P, Sala I, Myziuk N, Siddiqui Z, Guerrero T. Deep Learning for Contour Quality Assurance on RTOG 0933. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Trolinger‐Meadows K, Morton A, McCarrel T, Porter E, Dryden V. Use of venography including the dorsal 60° proximal‐palmaro‐/plantaro‐distal oblique to improve the evaluation of nonlaminitic digital disease of the horse. EQUINE VET EDUC 2021. [DOI: 10.1111/eve.13539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- K. Trolinger‐Meadows
- Department of Large Animal Clinical SciencesUniversity of Florida College of Veterinary Medicine Gainesville FloridaUSA
| | - A. Morton
- Department of Large Animal Clinical SciencesUniversity of Florida College of Veterinary Medicine Gainesville FloridaUSA
| | - T. McCarrel
- Department of Large Animal Clinical SciencesUniversity of Florida College of Veterinary Medicine Gainesville FloridaUSA
| | - E. Porter
- Department of Small Animal Clinical Sciences University of Florida College of Veterinary Medicine Gainesville FloridaUSA
| | - V. Dryden
- Bur Oak Veterinary and Podiatry Services Lexington Kentucky USA
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Lozano D, Porter E, Guerrero T. MA02.10 Deriving Pulmonary Perfusion Images from 4DCT Using Deep Learning. J Thorac Oncol 2021. [DOI: 10.1016/j.jtho.2021.01.213] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Grzywacz V, Levitin R, Porter E, Siddiqui Z, Thompson A, Grills I, Chinnaiyan P, Guerrero T. Analysis of Parotid and Lacrimal Gland Radiation Dose in Hippocampal-avoiding Whole Brain Radiation Therapy. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.2375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Hite DA, Angelo L, Bhandari S, Bhattacharyya S, Bonnin E, Brousseau R, Ellis C, Faulkner H, Foran M, Goins D, Hill K, Jesse C, Kreuger D, McGuire J, Mioc B, O’Neal D, Patel P, Porter E, Wagner C. Determination of Retinyl Palmitate (Vitamin A) in Fortified Fluid Milk by Liquid Chromatography: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/86.2.375] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
A liquid chromatographic (LC) method was developed for fast and simple measurement of retinyl palmitate (vitamin A) in fortified milk. Retinyl acetate internal standard was added to a test portion of milk followed by extraction into hexane. The hexane extract was analyzed by LC using a normal-phase silica gel column equilibrated with mobile phase (conditioned hexane–isopropanol, 99.85 + 0.15, v/v) about 1 h before injections. The retinyl palmitate concentration was calculated by using a relative response factor determined with calibration standards. In the collaborative study, 11 laboratories analyzed 13 pairs of fluid milk materials in blind duplicate. Twelve of the materials were composed of skim milk (<0.5% fat), 1% fat milk, 2% fat milk, and 1% fat chocolate milk. Each material was fortified at 3 concentrations of retinyl palmitate of approximately 581 μg/L (1000 IU/qt), 1163 μg/L (2000 IU/qt), and 2236 μg/L (4000 IU/qt). The 13th material, unfortified skim milk, served as a matrix blank. Repeatability standard deviations (RSDr) without outliers ranged from 1.5 to 5.7% and reproducibility standard deviations (RSDR) without outliers ranged from 5.0 to 22.7%. cis-Isomers co-eluted with the predominant trans-retinyl palmitate isomer and were included in the results reported by all the collaborative laboratories. Endogenous long-chain esters from milk fat were also measured with the retinyl palmitate additive. The Study Director recommends that this method for determination of retinyl palmitate in fluid milk by LC be adopted First Action.
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Affiliation(s)
- Douglas A Hite
- Tennessee Department of Agriculture, Technical Services, PO Box 40627, Melrose Station, Nashville, TN 37204
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Thompson A, Siddiqui Z, Porter E, Guerrero T. A Novel Deep Learning Architecture for Deformable Imaging Registration applied to Image-Guided Radiotherapy. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Thompson A, Siddiqui Z, Porter E, Krauss D, Kabolizadeh P. DVH Analysis: A Custom, Scalable Software Platform Designed for Flexible Dosimetric Quantitative Evaluation. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.2256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Endrizzi J, Nobay F, Wiegand T, Porter E. Bronchoscopic Findings Associated with Inhaled Chlorine Toxicity. J Emerg Med 2015; 49:e123-e125. [PMID: 26153031 DOI: 10.1016/j.jemermed.2015.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2015] [Accepted: 04/16/2015] [Indexed: 06/04/2023]
Affiliation(s)
- Julie Endrizzi
- Department of Emergency Medicine, University of Rochester, Rochester, New York
| | - Flavia Nobay
- Department of Emergency Medicine, University of Rochester, Rochester, New York
| | - Timothy Wiegand
- Department of Emergency Medicine, University of Rochester, Rochester, New York
| | - Everett Porter
- Department of Emergency Medicine, University of Rochester, Rochester, New York
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Bahrami H, Porter E, Santorelli A, Gosselin B, Popovic M, Rusch LA. Flexible sixteen monopole antenna array for microwave breast cancer detection. Annu Int Conf IEEE Eng Med Biol Soc 2015; 2014:3775-8. [PMID: 25570813 DOI: 10.1109/embc.2014.6944445] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Radar based microwave imaging (MI) has been widely studied for breast cancer detection in recent times. Sensing dielectric property differences of tissues over a wide frequency band has been made possible by ultra-wideband (UWB) techniques. In this paper, a flexible, compact monopole antenna on a 100 μm Kapton polyimide is designed, using a high frequency structure simulator (HFSS), to be in contact with biological breast tissues over the 2-5GHz frequency range. The antenna parameters are optimized to obtain a good impedance match over the required frequency range. The designed antenna size is 18mm × 18mm. Further, a flexible conformal 4×4 ultra-wideband antenna array, in a format similar to that of a bra, was developed for a radar-based breast cancer detection system.
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Barker EN, Tasker S, Gruffydd-Jones TJ, Tuplin CK, Burton K, Porter E, Day MJ, Harley R, Fews D, Helps CR, Siddell SG. Phylogenetic analysis of feline coronavirus strains in an epizootic outbreak of feline infectious peritonitis. J Vet Intern Med 2013; 27:445-50. [PMID: 23517431 PMCID: PMC7166722 DOI: 10.1111/jvim.12058] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 10/16/2012] [Accepted: 01/22/2013] [Indexed: 11/29/2022] Open
Abstract
Background Feline coronavirus (FCoV) infection is common. In a small percentage of cats, FCoV infection is associated with the fatal disease feline infectious peritonitis (FIP). Genetically distinct virulent and avirulent strains of FCoV might coexist within a cat population. Objectives To determine whether the strains of FCoV in FIP‐affected cats are closely related or genetically distinct from the fecally derived strains of FCoV in contemporary‐asymptomatic cats during an epizootic outbreak of FIP. Animals Four cats euthanized because of FIP and 16 asymptomatic cats. Methods This prospective outbreak investigation was initiated during an outbreak of FIP in cats within or rehomed from a rescue/rehoming center. Postmortem samples were collected from cats with FIP and contemporaneous fecal samples from asymptomatic cats. RNA was purified from tissue and fecal samples, FCoV gene fragments were reverse transcribed, PCR‐amplified using novel primers, and sequenced. Sequences were aligned with ClustalW and compared with published FCoV sequences. Results FCoV RNA was detected in all 4 FIP cat postmortem samples and in 9 of the 16 fecal samples from contemporary‐asymptomatic cats. Novel primers successfully amplified fragments from 4 regions of the genome for all FCoV‐positive samples. Phylogenetic analysis showed that the FIP‐associated strains of FCoV from the outbreak were very closely related to the fecally derived strains of FCoV from contemporary‐asymptomatic cats. Conclusions and Clinical Importance Sequence analysis provided no evidence that genetically distinct virulent and avirulent strains of FCoV were present during this FIP outbreak.
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Affiliation(s)
- E N Barker
- School of Veterinary Sciences, University of Bristol, Bristol, UK.
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Sampson J, Hoult JRS, Porter E, Houghton PJ, Simmonds MSJ. Identification of plants used for the relief of inflammation in traditional medicine as inhibitors of eicosanoid generation by activated leucocytes. J Pharm Pharmacol 2011. [DOI: 10.1111/j.2042-7158.1998.tb02281.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- J Sampson
- Centre for Bioactivity Screening of Natural Products, Department of Pharmacy, King’s College London
| | - J R S Hoult
- Department of Pharmacology, King’s College London, Manresa Road, London SW3 6LX
| | - E Porter
- Jodrell Laboratories, Royal Botanic Gardens Kew, Richmond, Surrey TW9 3AE
| | - P J Houghton
- Centre for Bioactivity Screening of Natural Products, Department of Pharmacy, King’s College London
| | - M S J Simmonds
- Centre for Bioactivity Screening of Natural Products, Department of Pharmacy, King’s College London
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van Eeden S, Offerhaus GJA, Hart AAM, Boerrigter L, Nederlof PM, Porter E, van Velthuysen MLF. Goblet cell carcinoid of the appendix: a specific type of carcinoma. Histopathology 2008; 51:763-73. [PMID: 18042066 DOI: 10.1111/j.1365-2559.2007.02883.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
AIMS Goblet cell carcinoid is a poorly understood tumour of the appendix. The aim of this study was to determine whether it should be regarded as a separate entity or as a variant of classical carcinoid. METHODS AND RESULTS The immunohistochemical expression pattern of 21 markers and the mutation status of KRas codon 12 were determined in 16 goblet cell carcinoids and compared with 14 classical carcinoids, 19 colonic adenocarcinomas and 10 appendiceal mucinous cystadeno (carcino)mas. The results were subjected to a stepwise linear discriminant analysis. Goblet cell carcinoids were significantly different from the control groups. The most important markers for discriminating between the groups were CEA (classical carcinoid versus all others), KRas mutation (present in all mucinous cystadeno (carcino)mas), beta-catenin (goblet cell carcinoid versus left sided colonic adenocarcinoma) and chromogranin (goblet cell carcinoid versus right sided colonic adenocarcinoma). Expression of Math1 and HD5 was similar in goblet cell carcinoid and colonic adenocarcinoma but absent in classical carcinoid. CONCLUSION The results suggest that goblet cell carcinoids should be regarded as a separate entity. The formerly used term 'crypt cell carcinoma' may be more appropriate because it reflects the more aggressive clinical behaviour of these tumours as well as their greater similarity to adenocarcinomas rather than to carcinoids.
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Affiliation(s)
- S van Eeden
- Department of Pathology, Academic Medical Centre, Amsterdam, The Netherlands.
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Porter E, Damani N. Epidemic meticillin-resistant Staphylococcus aureus strains associated with Northern Ireland. J Hosp Infect 2006; 65:88-9. [PMID: 17145106 DOI: 10.1016/j.jhin.2006.09.020] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2006] [Accepted: 09/20/2006] [Indexed: 11/24/2022]
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Abstract
AIMS To assess the spontaneous resolution of neonatal nephrocalcinosis and its long term effects on renal function. METHODS Fourteen very low birthweight preterm babies with nephrocalcinosis were followed up at 5-7 years of age; 14 controls were matched for sex, gestation, and birth weight. Height, weight, blood pressure, and renal symptomatology were recorded, and a renal ultrasound scan was performed. Early morning urine osmolality and creatinine ratios of albumin, phosphate, calcium, oxalate and beta microglobulin were determined. Urea and electrolytes in the study group were determined, and glomerular filtration rate (GFR) and TmP/GFR (tubular reabsorption of phosphate per GFR) were calculated. Statistical analysis was performed on a group basis using the Mann-Whitney confidence interval. RESULTS Mean age was 6.9 years (range 5.81-7.68). An early morning urine osmolality >700 mOsm/kg was achieved in all cases. In two cases and four controls, the calcium/creatinine ratio was >0.7 mmol/mmol. In all cases, the GFR was normal (median 132.6 ml/min/1.73 m(2) (range 104.1-173.1)). Median TmP/GFR was 1.22 mmol/l (0.73-1.61), with two having levels below the normal range. These did not have persisting nephrocalcinosis. Nephrocalcinosis was found in three of the 12 cases scanned and one control. There were no significant differences in urine biochemistry. CONCLUSIONS Resolution of nephrocalcinosis occurred in 75% of cases. No evidence was found to suggest that nephrocalcinosis is associated with renal dysfunction in the long term. There was evidence of hypercalciuria in the cases and controls, suggesting that prematurity may be a risk factor.
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Affiliation(s)
- E Porter
- Southern General Hospital, Govan Road, Govan, Glasgow G51 4TF, Scotland, UK.
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Walker SL, Ribey SC, Trudel L, Porter E. Canadian environmental effects monitoring: experiences with pulp and paper and metal mining regulatory programs. Environ Monit Assess 2003; 88:311-326. [PMID: 14570420 DOI: 10.1023/a:1025581426260] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In Canada, Environmental Effects Monitoring (EEM) programs exist within two regulations: the Pulp and Paper Effluent Regulations and the new Metal Mining Effluent Regulations under the Canadian Fisheries Act. EEM provides a biological, effects-based feedback loop to assess the effectiveness of technology-based regulations in protecting receiving environments. The promulgation of the Pulp and Paper Effluent Regulations, in 1992, represented a significant step forward in the Canadian regulatory approach by incorporating directly into a regulation a requirement to assess the effects of effluent discharges on receiving environments using proven scientific monitoring methodologies. Similarly, an assessment of the aquatic impacts of mines resulted in recommendations to amend the Metal Mining Effluent Regulations, recently promulgated in 2002, and includes an EEM program as a science-based feedback loop. As such, these regulations recognize the possibility that national, technology-based standards may not necessarily protect all receiving environments because of the diversity and variability of both discharges and receiving sites across the country. Since that time, EEM has improved its flexibility by considering both advances in science and the uniqueness of monitoring sites across Canada to allow the most appropriate and cost-effective monitoring approaches at each site while maintaining national consistency. This paper discusses the use of monitoring under two Canadian regulations to assess effects on aquatic ecosystems. As well, the National EEM approach to maintaining up-to-date scientific practices in a national regulatory program is discussed using examples.
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Affiliation(s)
- S L Walker
- National EEM Office, Environment Canada, 351 St. Joseph Blvd, Place Vincent Massey, 8th fl, Hull, Quebec, K1A OH3, Canada.
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Abstract
The medical care of people with epilepsy has often been described as being poor, although objective markers for the quality of epilepsy care are lacking. This paper describes the results of using a simple quality marker, appropriate measuring of serum anticonvulsant levels, in assessing the quality of epilepsy care. The checking of serum phenytoin levels in certain clinical circumstances is advocated, whereas the checking of serum sodium valproate levels is not generally supported. A total of 1254 people with epilepsy in the community had their medical records examined for evidence of checking of anticonvulsant levels and 1204 of these individuals completed questionnaires about their epilepsy and its treatment. Of those on phenytoin, only 26% to 47% had phenytoin levels checked appropriately; 23% of patients on sodium valproate were inappropriately having their serum levels checked. The only clinical or organizational factor that predicted whether checking of serum phenytoin levels was performed was whether or not patients reported three common phenytoin side-effects but this still showed a small effect size (odds ratio 2.4).
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Affiliation(s)
- A Thapar
- Department of General Practice and National Primary Care Research and Development Centre, University of Manchester, Manchester, UK
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LaCroix DE, Wolf WR, Porter E, Cantellops D, Chase GW, Woollard D. Determination of niacin in infant formula by solid-phase extraction and anion-exchange liquid chromatography. J AOAC Int 2001; 84:789-804. [PMID: 11417644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
A peer-verified, solid-phase extraction (SPE)/anion exchange liquid chromatographic method is presented for the determination of niacin in milk-based and soy-based infant formula. Analysis is in 3 steps: test sample digestion, extraction/cleanup, and liquid chromatography (LC). Digestion uses a standard AOAC digestion procedure that involves autoclaving at 121 degrees C for 45 min in (1 + 1) H2SO4 to free endogenous niacin from protein and to convert added niacinamide to niacin. The digest solution is adjusted to pH 6.5 with 7.5M NaOH. Acidification to pH <1.0 with (1 + 1) H2SO4 precipitates the protein. The clarified solution is then filtered, and the filtrate is brought to volume. SPE of niacin is accomplished by passing an aliquot of the digest solution through an aromatic sulfonic acid-SPE (ArSCX-SPE) column. After the column is washed with methanol and water to remove extraneous material, the niacin is eluted with 0.25M sodium acetate/acetic acid buffer at pH 5.6. An anion-exchange polystyrene-divinylbenzene column with 0.1 M sodium acetate/acetic acid buffer at pH 4.0 is used for LC. Niacin is determined by UV detection at 260 nm. A standard curve is prepared by passing known amounts of niacin through the ArSCX-SPE columns used for niacin extraction. The following values for x and relative standard deviation (RSD) were obtained for National Institute of Standards and Technology Standard Reference Material (NIST SRM) 1846 Infant Formula with a certified value for niacin of 63.3 +/- 7.6 microg/g: Submitting laboratory.-- x = 59.7 +/- 4.0 microg/g; RSD = >6.7%; confidence interval (CI) = +/- 1.4 microg/g; n = 27. Peer laboratory.--x = 56.6 +/- 6.6 microg/g; RSD = >11.7%; CI =+/- 4.1 microg/g; n = 8.
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Affiliation(s)
- D E LaCroix
- US Department of Agriculture, Beltsville Human Nutrition Research Center, Food Composition Laboratory, Beltsville, MD 20705-2350, USA.
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Porter E. Pre-dialysis: initiatives in Canada. Nephrol News Issues 1998; 12:15-6. [PMID: 10026486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
Predialysis care in Canada is well developed in some centers, but not in others. In response to this, a multidisciplinary Canadian Predialysis Education Advisory Board was established in 1997. Its purpose is to develop a standardized, national core curriculum for pre-dialysis patient education. This article describes the activities of this committee and plans for the future.
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Mack R, Salmoni A, Viverais-Dressler G, Porter E, Garg R. Perceived risks to independent living: the views of older, community-dwelling adults. Gerontologist 1997; 37:729-36. [PMID: 9432989 DOI: 10.1093/geront/37.6.729] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
The purpose of the present study was to gather the perceptions of older, community-dwelling adults about factors they considered essential for them to remain living within the community. In-depth interviews were conducted with 103 men and women over the age of 65 years who were living in their own home or apartment, within an urban center. Factors such as finances, health, family support, a sense of identity, and a feeling of independence were perceived by older adults to contribute to their ability to remain living in the community. Importantly, older adults viewed threats to this continued independent living as both (a) factors connected to losses and maintenance of capability, but also (b) as impediments to further growth of their personal well-being.
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Affiliation(s)
- R Mack
- Centre for Research in Human Development, Laurentian University, Sudbury, Ontario, Canada
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Porter E. Training for health visitors in the 'Look after yourself' programme. Health Visit 1994; 67:307-8. [PMID: 7960847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
'Look after yourself' and the subsequent 'Look after your heart' programmes are widely used by health visitors in local health promotion initiatives. Elizabeth Porter argues for training in LAYH: LAY tutoring to be included in the health visitor education syllabus, and reports on the success of this initiative at Southampton University.
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Porter E. Getting to know your preceptor. Health Visit 1994; 67:273. [PMID: 7960832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
The report of the post registration and practice project (PREP) recommends that a preceptor should be available to provide support for every newly-registered health visitor. Elizabeth Porter describes their role.
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Affiliation(s)
- E Porter
- University of Nevada School of Medicine, Las Vegas
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Rockwell S, Irvin CG, Kelley M, Hughes CS, Yabuki H, Porter E, Fischer JJ. Effects of hyperbaric oxygen and a perfluorooctylbromide emulsion on the radiation responses of tumors and normal tissues in rodents. Int J Radiat Oncol Biol Phys 1992; 22:87-93. [PMID: 1727131 DOI: 10.1016/0360-3016(92)90986-r] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Perfluorochemical emulsions are being examined in many laboratory and clinical studies as possible adjuncts to radiotherapy and chemotherapy. The studies reported here examine the clinical potential of hyperbaric oxygen (HBO) in combination with a highly concentrated perfluorochemical emulsion (Oxygent) containing 100% w/v perfluorooctylbromide (PFOB). HBO alone produced only a small improvement in the radiation response of BA1112 tumors in WAG/rij rats, while regimens combining HBO with Oxygent produced much greater radiation sensitization. A sham emulsion, formulated without the O2-carrying PFOB, did not alter the radiation response of the tumors in comparison with that seen with HBO alone. Neither HBO nor Oxygent plus HBO altered the radiosensitivity of bone marrow progenitor cells in BALB/c mice. HBO alone augmented skin reactions in BALB/c mice, but addition of Oxygent did not alter the skin reactions in comparison to those seen with HBO alone. Regimens combining Oxygent with HBO selectively increased the radiation sensitivity of tumors relative to normal tissues, thereby enhancing the therapeutic ratio. These results support the potential usefulness of perfluorochemical emulsions and HBO in clinical radiation therapy.
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Affiliation(s)
- S Rockwell
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT 06510-8040
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Rockwell S, Kelley M, Irvin CG, Hughes CS, Yabuki H, Porter E, Fischer JJ. Preclinical evaluation of Oxygent as an adjunct to radiotherapy. Biomater Artif Cells Immobilization Biotechnol 1992; 20:883-93. [PMID: 1391528 DOI: 10.3109/10731199209119735] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
These studies examine the potential value of a concentrated emulsion of perfluorooctylbromide (perflubron; Oxygent, Alliance Pharmaceutical Corp.) as an adjunct to radiotherapy. The effects of Oxygent on solid tumors were examined using EMT6 mammary tumors in BALB/c mice and BA1112 rhabdomyosarcomas in WAG/rij rats. Treatment with Oxygent plus O2, carbogen (95% O2/5% CO2), or hyperbaric oxygen (HBO) increased the effects of radiation on the tumors. Analyses of tumor cell survival curves and measurements of intratumor pO2 showed that this potentiation reflected an increase in the proportion of well-oxygenated tumor cells. Neither treatment of the animals with carbogen, O2, or HBO alone nor treatment of air-breathing rodents with Oxygent produced changes of similar magnitude. Treatment with a vehicle emulsion containing all the components of Oxygent except the perflubron did not alter tumor radiosensitivity, showing that tumor radiosensitization required the oxygen-transporting perfluorocarbon, and did not result from any biologic or physiologic effects of other components of the emulsion. These studies also examined the effects of Oxygent on the radiation responses of mouse skin and bone marrow. Oxygent selectively increased the radiation sensitivity of tumors relative to these normal tissues, thereby increasing the therapeutic ratio and producing therapeutic gain. Oxygent appears to warrant further testing as an adjunct to cancer therapy.
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Affiliation(s)
- S Rockwell
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, CT 06510-8040
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Rockwell S, Kelley M, Irvin CG, Hughes CS, Porter E, Yabuki H, Fischer JJ. Modulation of tumor oxygenation and radiosensitivity by a perfluorooctylbromide emulsion. Radiother Oncol 1991; 22:92-8. [PMID: 1957007 DOI: 10.1016/0167-8140(91)90003-y] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The effect of a concentrated perfluorooctylbromide emulsion (Oxygent) on the radiosensitivity and oxygenation of solid tumors was examined using EMT6 mammary tumors in BALB/c mice and BA1112 rhabdomyosarcomas in WAG/rij rats. Treatment with Oxygent plus carbogen or oxygen breathing increased the radiosensitivity of both tumors. Analysis of tumor cell survival data and polarographic measurements of intratumoral pO2 indicated that this potentiation reflected an increase in the proportion of well-oxygenated tumor cells. Treatments with carbogen breathing alone, with Oxygent plus air-breathing, or with a vehicle emulsion containing all the components except the perfluorocarbon did not produce comparable improvements in tumor radiosensitivity. Concentrated perfluorooctylbromide emulsions appear to warrant further development and preclinical testing as adjuncts to cancer therapy.
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Affiliation(s)
- S Rockwell
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, Connecticut 06510-8040
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North N, Porter E. Community Health. All change ahead. Nurs Times 1991; 87:57-8, 60. [PMID: 1990361] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Morton JD, Porter E, Yabuki H, Nath R, Rockwell S. Effects of a perfluorochemical emulsion on the response of BA1112 rat rhabdomyosarcomas to continuous low-dose-rate irradiation. Radiat Res 1990; 124:178-82. [PMID: 2123353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The effects of the combination of a perfluorochemical emulsion (Fluosol DA, 20%) and carbogen (95% O2, 5% CO2) on the response of BA1112 rat rhabdomyosarcomas to continuous low-dose-rate irradiation were examined. Tumors were irradiated locally in unrestrained, unanesthetized rats at a dose rate of 0.98 Gy/h, using a specially designed 241Am irradiator system. Cell survival was measured using a colony formation assay. The tumor cell survival curves were fitted to linear relationships of the form ln S = - alpha D, where alpha for air-breathing rats was 0.104 +/- 0.005 Gy-1, as compared to 0.137 +/- 0.009 Gy-1 for rats treated with Fluosol plus carbogen. The increase in the slope of the survival curve produced by the treatment with Fluosol and carbogen was highly significant with a P value of 0.0015. The radiosensitization factor for the combination of Fluosol/carbogen plus continuous low-dose-rate irradiation was 1.32 +/- 0.11. Slightly less radiosensitization was observed with continuous low-dose-rate irradiation than in previous experiments using acute high-dose-rate irradiation. The diminished sensitization with Fluosol/carbogen during continuous low-dose-rate irradiation probably reflects the intrinsically lower oxygen enhancement ratio (OER) of low-dose/low-dose-rate irradiation, reoxygenation of the tumors during the prolonged treatment times used for continuous low-dose-rate irradiation, and the decrease in the levels of circulating perfluorochemicals during the 30-h irradiations. More importantly, the significant level of radiosensitization observed in the experiments with continuous low-dose-rate irradiation suggests that hypoxic cells persist in BA1112 tumors during continuous low-dose-rate irradiations and that the response of these tumors to continuous low-dose-rate irradiation can be improved by adjunctive treatments which oxygenate these radioresistant hypoxic tumor cells.
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Affiliation(s)
- J D Morton
- Department of Therapeutic Radiology, Yale University School of Medicine, New Haven, Connecticut 06510-8040
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Haun N, Porter E, Chance G. Care of the normal neonate. Can Nurse 1984; 80:37-40. [PMID: 6566590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Porter E. Community health councils. Br Med J 1980; 280:720. [PMID: 7363041 PMCID: PMC1600838 DOI: 10.1136/bmj.280.6215.720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Porter E. Community health councils and the public. West J Med 1976. [DOI: 10.1136/bmj.2.6040.883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
An experiment was carried out to determine how proximity is perceived as a cue in dyadic interaction. Ss held conversations with 3 confederates at distances of 2, 4, and 8 ft. and completed 21 7-point rating scales. Proximity did not account for any significant amount of variance in any scale. Confederates were perceived differently after interviews than after informal conversations. Ss did not give more favourable ratings to confederates who sat nearer their own preferred proximity, as determined by the method of limits. It is concluded that while proximity has certain dear determinants, e.g., liking and emotional adjustment, these are not reflected in the way proximity is perceived.
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