4 results
Search Results
2. Design of a novel filter paper based construct for rapid analysis of acetone
- Author
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Yaqeen Ali, Fakhar Ullah, Sajid Rauf, Akhtar Hayat, and Sabir Hussain
- Subjects
Time Factors ,Economics ,Social Sciences ,lcsh:Medicine ,Diazo Compounds ,02 engineering and technology ,HSL and HSV ,01 natural sciences ,Signal ,chemistry.chemical_compound ,Endocrinology ,Filter Paper ,Limit of Detection ,Medicine and Health Sciences ,Nanotechnology ,lcsh:Science ,Multidisciplinary ,Organic Compounds ,021001 nanoscience & nanotechnology ,Laboratory Equipment ,Signal Filtering ,Chemistry ,Bioassays and Physiological Analysis ,Physical Sciences ,Costs and Cost Analysis ,Engineering and Technology ,0210 nano-technology ,Biological system ,Research Article ,Paper ,Employment ,Materials science ,Alginates ,Endocrine Disorders ,Materials Science ,Equipment ,Research and Analysis Methods ,Acetone ,Acetones ,Diabetes Mellitus ,Figure of merit ,Colorimetric Assays ,Materials by Attribute ,Nanomaterials ,Detection limit ,Filter paper ,Organic Chemistry ,010401 analytical chemistry ,lcsh:R ,Chemical Compounds ,Ranging ,0104 chemical sciences ,chemistry ,Metabolic Disorders ,Labor Economics ,Signal Processing ,RGB color model ,lcsh:Q ,Biochemical Analysis ,Filtration - Abstract
The present work was focused to design a cheap, rapid, portable and easy to use filter paper based assay for the qualitative and quantitate analysis of acetone. Sodium alginate gel was loaded with the acetone specific optical signal probe, and subsequently coated onto filter paper surface to design portable colorimetric assays for acetone monitoring. The color of the paper sensor strip was observed to change from dark yellow to light yellowish in the presence of varying concentrations of acetone. Three different color analyzing models including RGB, HSV, and LAB were employed to probe the output optical signal, and their performance was compared in terms of better interpretation of the generated signal. The LAB model was found to provide better analytical figures of merit with a linear response for the acetone concentration ranging from 2.5 to 1500 ppm, and a limit of detection of 0.5 ppm. Furthermore, the specificity of the designed filter paper based sensor was demonstrated against different common interfering compounds. The results demonstrated the potential of our proposed filter paper based sensor as a novel tool for the analysis of acetone.
- Published
- 2018
3. Natural resource-based industries and prostate cancer risk in Northeastern Ontario: a case-control study
- Author
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Paul A. Demers, Nancy Lightfoot, Donald C. Cole, Jeavana Sritharan, Shelley A. Harris, Andrea M. Sass-Kortsak, and Nancy Kreiger
- Subjects
Gerontology ,Employment ,Male ,Paper ,Work ,Logistic regression ,Mining ,03 medical and health sciences ,Prostate cancer ,0302 clinical medicine ,Risk Factors ,Environmental health ,Natural Resources ,Occupational Exposure ,Manufacturing Industry ,Odds Ratio ,Medicine ,Humans ,030212 general & internal medicine ,Exposure assessment ,Aged ,Aged, 80 and over ,Ontario ,business.industry ,Public Health, Environmental and Occupational Health ,Case-control study ,Cancer ,Prostatic Neoplasms ,Agriculture ,Forestry ,Odds ratio ,Middle Aged ,medicine.disease ,Natural resource ,Wood ,Cancer registry ,Occupational Diseases ,Logistic Models ,030220 oncology & carcinogenesis ,Case-Control Studies ,business - Abstract
Objective Prostate cancer continues to be the most commonly diagnosed cancer in men, and there is limited knowledge on its preventable risk factors. A number of occupational exposures in natural resource-based industries are suspected to be related to prostate cancer risk. This study investigates associations between employment in these industries and prostate cancer. Methods Data were from a population-based, case–control study previously conducted in Northeastern Ontario. Incident cases (N=760) aged 45–85 years and diagnosed with prostate cancer between 1995 and 1998 were identified from the Ontario Cancer Registry. Controls (N=1632) were recruited using telephone listings, and were frequency matched to cases by age. Lifetime occupational history was collected for all participants. Logistic regression was used to estimate ORs and their associated 95% CIs. Results Elevated risks were observed for employment in forestry and logging industries (OR=1.87, 95% CI 1.32 to 2.73) and occupations (OR=1.71, 95% CI 1.24 to 2.35), and these risks increased with duration of employment for ≥10 years. Elevated risks were also found for employment in wood products industries (OR=1.45, 95% CI 1.07 to 1.97), and paper and allied products industries (OR=1.43, 95% CI 1.03 to 2.00), and when duration of employment was ≥10 years. There were also elevated risks in agriculture and mining-related work; however, these findings were not consistent across industry and occupation categories. Conclusions Prostate cancer risk may be associated with work in several natural resource industries, primarily in the forest industries. To further evaluate observed associations, studies should focus on natural resource-based exposures in larger populations with improved exposure assessment.
- Published
- 2016
4. Paper sector.
- Subjects
PAPER industry ,PAPER ,BUSINESS forecasting ,INDIAN economy, 1991- ,ECONOMIC demand ,EMPLOYMENT ,INTERNATIONAL trade - Abstract
The article offers information on the paper industry in India and the contributions of the said industry to the country's economy. Topics discussed include the economic aspects of the industry including its portion in the global paper production, employment, and its use of technology; the status of exports and imports; and forecast for growth in paper demand in fiscal year (FY) 2020.
- Published
- 2018
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