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Search Results: 1 - 10 of 14812 matches for " Jones Andria Q "
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A qualitative exploration of the perceptions and information needs of public health inspectors responsible for food safety
Mai T Pham, Andria Q Jones, Jan M Sargeant, Barbara J Marshall, Catherine E Dewey
BMC Public Health , 2010, DOI: 10.1186/1471-2458-10-345
Abstract: Four focus group discussions were conducted with public health inspectors from the Central West region of Ontario, Canada during June and July, 2008. A questioning route was used to standardize qualitative data collection. Audio recordings of sessions were transcribed verbatim and data-driven content analysis was performed.A total of 23 public health inspectors participated in four focus group discussions. Five themes emerged as key food safety issues: time-temperature abuse, inadequate handwashing, cross-contamination, the lack of food safety knowledge by food handlers and food premise operators, and the lack of food safety information and knowledge about specialty foods (i.e., foods from different cultures). In general, participants reported confidence with their current knowledge of food safety issues and foodborne pathogens. Participants highlighted the need for a central source for food safety information, access to up-to-date food safety information, resources in different languages, and additional food safety information on specialty foods.The information gathered from these focus groups can provide a basis for the development of resources that will meet the specific needs of public health inspectors involved in protecting and promoting food safety.Foodborne illness represents a significant health burden in the province of Ontario, Canada. According to an Ontario Ministry of Agriculture, Food and Rural Affairs (OMAFRA) analysis by Campbell (2002), there are more than 2.5 million cases of foodborne illness each year in Ontario, resulting in 9,319 hospitalizations and 135 deaths [1]. Since many cases of foodborne illness are often not reported, the actual number and impact of foodborne illnesses in Ontario is likely to be greater. A study estimating the rate of underreporting for infectious gastrointestinal illness in Ontario found that for each reported case of enteric illness, an estimated 313 cases of infectious gastrointestinal illness occurred in the commu
Exposure assessment in investigations of waterborne illness: a quantitative estimate of measurement error
Jones Andria Q,Dewey Catherine E,Doré Kathryn,Majowicz Shannon E
Epidemiologic Perspectives and Innovations , 2006, DOI: 10.1186/1742-5573-3-6
Abstract: Background Exposure assessment is typically the greatest weakness of epidemiologic studies of disinfection by-products (DBPs) in drinking water, which largely stems from the difficulty in obtaining accurate data on individual-level water consumption patterns and activity. Thus, surrogate measures for such waterborne exposures are commonly used. Little attention however, has been directed towards formal validation of these measures. Methods We conducted a study in the City of Hamilton, Ontario (Canada) in 2001–2002, to assess the accuracy of two surrogate measures of home water source: (a) urban/rural status as assigned using residential postal codes, and (b) mapping of residential postal codes to municipal water systems within a Geographic Information System (GIS). We then assessed the accuracy of a commonly-used surrogate measure of an individual's actual drinking water source, namely, their home water source. Results The surrogates for home water source provided good classification of residents served by municipal water systems (approximately 98% predictive value), but did not perform well in classifying those served by private water systems (average: 63.5% predictive value). More importantly, we found that home water source was a poor surrogate measure of the individuals' actual drinking water source(s), being associated with high misclassification errors. Conclusion This study demonstrated substantial misclassification errors associated with a surrogate measure commonly used in studies of drinking water disinfection byproducts. Further, the limited accuracy of two surrogate measures of an individual's home water source heeds caution in their use in exposure classification methodology. While these surrogates are inexpensive and convenient, they should not be substituted for direct collection of accurate data pertaining to the subjects' waterborne disease exposure. In instances where such surrogates must be used, estimation of the misclassification and its subsequent effects are recommended for the interpretation and communication of results. Our results also lend support for further investigation into the quantification of the exposure misclassification associated with these surrogate measures, which would provide useful estimates for consideration in interpretation of waterborne disease studies.
Public perceptions of drinking water: a postal survey of residents with private water supplies
Andria Q Jones, Catherine E Dewey, Kathryn Doré, Shannon E Majowicz, Scott A McEwen, Waltner-Toews David, Mathews Eric, Deborah J Carr, Spencer J Henson
BMC Public Health , 2006, DOI: 10.1186/1471-2458-6-94
Abstract: A cross-sectional postal survey of 246 residences with private water supplies was conducted in May 2004. Questions pertained to the perceptions of water quality and alternative water sources, water testing behaviours and the self-identified need for further information.Private wells, cisterns or both, were the source of household water for 71%, 16% and 13% of respondents, respectively. Although respondents rated their water quality highly, 80% also had concerns with its safety. The most common concerns pertained to bacterial and chemical contamination of their water supply and its potential negative effect on health. Approximately 56% and 61% of respondents used in-home treatment devices and bottled water within their homes, respectively, mainly due to perceived improvements in the safety and aesthetic qualities compared to regular tap water. Testing of private water supplies was performed infrequently: 8% of respondents tested at a frequency that meets current provincial guidelines. Two-thirds of respondents wanted more information on various topics related to private water supplies. Flyers and newspapers were the two media reported most likely to be used.Although respondents rated their water quality highly, the majority had concerns regarding the water from their private supply, and the use of bottled water and water treatment devices was extensive. The results of this study suggest important lines of inquiry and provide support and input for public education programs, particularly those related to private water testing, in this population.Over four million Canadians receive their drinking water from private water supplies, predominantly from groundwater wells [1]. In Canada, the legal responsibility for the condition of private water supplies, such as private wells and cisterns, lies with their owners [2]. There are reports, however, that Canadians with private water supplies test their water intermittently, if at all [1,3], and that water treatment within their
Public perception of drinking water from private water supplies: focus group analyses
Andria Q Jones, Catherine E Dewey, Kathryn Doré, Shannon E Majowicz, Scott A McEwen, David Waltner-Toews, Spencer J Henson, Eric Mathews
BMC Public Health , 2005, DOI: 10.1186/1471-2458-5-129
Abstract: In September 2003, three focus group discussions were conducted; two with men and women aged 36–65 years, and one with men and women 20–35 years of age.Overall, participants had positive perceptions of their private water supplies, particularly in the older age group. Concerns included bacterial and chemical contamination from agricultural sources. Testing of water from private supplies was minimal and was done less frequently than recommended by the provincial government. Barriers to water testing included the inconvenience of the testing process, acceptable test results in the past, resident complacency and lack of knowledge. The younger participants greatly emphasized their need for more information on private water supplies. Participants from all groups wanted more information on water testing, and various media for information dissemination were discussed.While most participants were confident in the safety of their private water supply, the factual basis for these opinions is uncertain. Improved dissemination of information pertaining to private water supplies in this population is needed. Observed differences in the concerns expressed by users of different water systems and age groups may suggest the need for targeted public education strategies. These focus groups provided significant insight into the public perception of private water supplies and the need for public health outreach activities; however, to obtain a more representative understanding of the perceptions in this population, it is important that a larger scale investigation be performed.Over four million Canadians receive their drinking water from private water supplies, predominantly from groundwater wells [1]. Numerous studies report that Canadian private water supplies often exceed the minimal acceptable standards for microbial and chemical contamination [1-5], and it is estimated that 45 percent of all waterborne disease outbreaks in Canada involve non-municipal systems, largely in rural or
Population distribution and burden of acute gastrointestinal illness in British Columbia, Canada
M Kate Thomas, Shannon E Majowicz, Laura MacDougall, Paul N Sockett, Suzie J Kovacs, Murray Fyfe, Victoria L Edge, Kathryn Doré, James A Flint, Spencer Henson, Andria Q Jones
BMC Public Health , 2006, DOI: 10.1186/1471-2458-6-307
Abstract: The magnitude and distribution of acute GI in British Columbia (BC), Canada was evaluated via a cross-sectional telephone survey of 4,612 randomly selected residents, conducted from June 2002 to June 2003. Respondents were asked if they had experienced vomiting or diarrhoea in the 28 days prior to the interview.A response rate of 44.3% was achieved. A monthly prevalence of 9.2% (95%CI 8.4 – 10.0), an incidence rate of 1.3 (95% CI 1.1–1.4) episodes of acute GI per person-year, and an average probability that an individual developed illness in the year of 71.6% (95% CI 68.0–74.8), weighted by population size were observed. The average duration of illness was 3.7 days, translating into 19.2 million days annually of acute GI in BC.The results corroborate those from previous Canadian and international studies, highlighting the substantial burden of acute GI.Gastrointestinal illness (GI) is a global public health concern. In developed countries, GI is typically mild and self-limiting, but has considerable economic impact due to high morbidity [1-3]. Recent studies on the burden of GI in the general population of a number of countries have been reported [4-12]. To estimate the burden of GI in the Canadian population, the Public Health Agency of Canada (PHAC; formerly Health Canada) developed the National Studies on Acute Gastrointestinal Illness (NSAGI) initiative in 2000. Population-based studies, designed to describe self-reported, acute GI in selected Canadian populations, are part of this initiative. In March 2002, the PHAC completed the first such population study in the City of Hamilton, Ontario, Canada [13]. In order to determine if the burden of GI was the same across the country, a second population study was completed in the province of British Columbia (BC) in June 2003. Additionally, since public health in Canada is primarily a provincial responsibility, this study was conducted to provide information to BC policy makers. The current paper describes the frequen
Matthew P. Gidaly,Andria D. Harris,Maria del Rosario I. Amado-Sierra,Daniel S. Jones
Acta Crystallographica Section E , 2009, DOI: 10.1107/s1600536809005844
Abstract: The title compound, C10H8O2, is a precursor to an unusual bis-homoaromatic dication and to heterodiamantanes and other oxa-cage compounds. Two independent molecules, each of which is situated on a center of symmetry, comprise the unit cell. Both molecules are in nearly identical chair conformations.
Andria D. Harris,Amy D. Baucom,Maria del Rosario I. Amado Sierra,Daniel S. Jones
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808035423
Abstract: The title compound, C10H12O2, was synthesized as a candidate for further functionalization. The asymmetric unit comprises two independent molecules, both of which are situated on a center of symmetry. Both molecules are involved in a network of hydrogen bonding, with each alcohol group participating in one hydrogen bond as a donor and in a second hydrogen bond as an acceptor.
Andria D. Harris,Amy D. Baucom,Jessica L. Brown,Daniel S. Jones
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536808017418
Abstract: The title compound, C12H8BrN, was prepared as a starting material for a Suzuki cross-coupling reaction with a pinacol ester. The torsion angle about the ring–methylene C—C bond is 30.7 (3)°, such that the N atom is displaced by 1.174 (4) from the plane of the naphthalene ring system.
Biotransformation of (-)-Epigallocatechin-3-O-gallate into (-)-2R,3S-Dihydromyricetin by the Endophytic Fungus Diaporthe sp. E Isolate Obtained from a Tea Plant
HAYATI Journal of Biosciences , 2007,
Abstract: Endophytic fungi have been reported possess an interesting ability to mimic their host plant metabolites. Several fungi also show their specific capability to biotransform the chemical constituents of the host plant. The endophytic fungus Diaporthe sp. E isolate obtained from young stem of a tea plant (Camellia sinensis) show their unique capability to biotransform (-)-epigallocatechin-3-O-gallate [(-)-EGCG] into a major product in glucose-peptone-yeast extract medium that incubated under dark condition at 27 oC for 48 h. The major biotransformation product were isolated and purified through column chromatography techniques using Sephadex LH-20 and silica gel. The chemical structure of the major product were elucidated as (-)-2R,3S-dihydromyricetin based on their IR, FAB-MS, 1D- and 2D-NMR spectra.
Flutter Analysis of RX-420 Balistic Rocket Fin Involving Rigid Body Modes of Rocket Structures
Novi Andria
Makara Seri Teknologi , 2011,
Abstract: Flutter Analysis of RX-420 Balistic Rocket Fin Involving Rigid Body Modes of Rocket Structures. Flutter is a phenomenon that has brought a catastrophic failure to the flight vehicle structure. In this experiment, flutter was analyzed for its symmetric and antisymmetric configuration to understand the effect of rocket rigid modes to the finmflutter characteristic. This research was also expected to find out the safety level of RX-420 structure design. The analysis was performed using half rocket model. Fin structure used in this research was a fin which has semispan 600 mm, thickness 12 mm, chord root 700 mm, chord tip 400 mm, made by Al 6061-T651, double spar configuration with skin thickness of 2 mm. Structural dynamics and flutter stability were analyzed using finite element softwareimplemented on MSC. Nastran. The analysis shows that the antisymmetric flutter mode is more critical than symmetric flutter mode. At sea level altitude, antisymmetric flutter occurs at 6.4 Mach, and symmetric flutter occurs at 10.15 Mach. Compared to maximum speed of RX-420 which is 4.5 Mach at altitude 11 km or equivalent to 2.1 Mach at sea level, it can be concluded that the RX-420 structure design is safe, and flutter will not occur during flight.
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