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Tuan NH, Ganji RM, Jafari H. A numerical study of fractional rheological models and fractional Newell-Whitehead-Segel equation with non-local and non-singular kernel. Chin J Phys 2020; 68:308-320. [PMID: 38620336 PMCID: PMC7462662 DOI: 10.1016/j.cjph.2020.08.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/26/2020] [Accepted: 08/28/2020] [Indexed: 06/13/2023]
Abstract
In the recent years, few type of fractional derivatives which have non-local and non-singular kernel are introduced. In this work, we present fractional rheological models and Newell-Whitehead-Segel equations with non-local and non-singular kernel. For solving these equations, we present a spectral collocation method based on the shifted Legendre polynomials. To do this, we extend the unknown functions and its derivatives using the shifted Legendre basis. These expansions and the properties of the shifted Legendre polynomials along with the spectral collocation method will help us to reduce the main problem to a set of nonlinear algebraic equations. Finally, The accuracy and efficiency of the proposed method are reported by some illustrative examples.
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Affiliation(s)
- N H Tuan
- Division of Applied Mathematics, Thu Dau Mot University, Binh Duong Province, Vietnam
| | - R M Ganji
- Department of Mathematics, University of Mazandaran, Babolsar, Iran
| | - H Jafari
- Institute of Research and Development, Duy Tan University, Da Nang 550000, Vietnam
- Faculty of Natural Sciences, Duy Tan University, Da Nang 550000, Vietnam
- Department of Mathematical Sciences, University of South Africa, UNISA, 0003, South Africa
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Hue NTM, Nam VD, Thuong NV, Huyen NT, Phuong NTH, Hung NX, Tuan NH, Son LK, Minh NH. Determination of PCDD/Fs in breast milk of women living in the vicinities of Da Nang Agent Orange hot spot (Vietnam) and estimation of the infant's daily intake. Sci Total Environ 2014; 491-492:212-218. [PMID: 24613651 DOI: 10.1016/j.scitotenv.2014.02.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Revised: 02/10/2014] [Accepted: 02/10/2014] [Indexed: 06/03/2023]
Abstract
Seventeen toxic congeners of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) were determined in breast milks using the high resolution gas chromatography/high resolution mass spectrometry (HRGC/HRMS) method. Twenty seven breast milk samples were collected from primiparae who have lived over 5 years in wards namely Chinh Gian, An Khe, Khue Trung, and Hoa Thuan Tay which are located near the Da Nang Agent Orange hot spot (the AO/Dioxin hot spot). The samples were then analyzed for PCDD/F residues in order to assess the human exposure to dioxins from the AO/Dioxin hot spot, especially health risk to the breast-fed infants. The average TEQ levels in the four studied cohorts ranged from 8.1 to 26 pg/g lipid, with the highest level up to 51 pg TEQ/g lipid found in the An Khe ward. The TEQ level was correlated with geographical position and ranking in the order of Khue Trung, Hoa Thuan Tay, Chinh Gian and An Khe. The mean estimated PCDD/Fs infant's daily intake in the cohort of Khue Trung, Hoa Thuan Tay, Chinh Gian and An Khe was about 41, 122, 124, and 134 pg TEQ/kg bw/day, respectively, which are much higher than the tolerable daily intake proposed by the World Health Organization (4 pg TEQ/kg bw/day).
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Affiliation(s)
- N T M Hue
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam
| | - V D Nam
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam
| | - N V Thuong
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam
| | - N T Huyen
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam
| | - N T H Phuong
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam
| | - N X Hung
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam
| | - N H Tuan
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam
| | - L K Son
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam; Office of National Steering Committee 33, Ministry of Natural Resources and Environment, Nr. 83 Nguyen Chi Thanh, Hanoi, Vietnam
| | - N H Minh
- Dioxin Laboratory, Centre for Environment Monitoring, Vietnam Environment Administration, Nr. 556 Nguyen Van Cu, Long Bien, Hanoi, Vietnam.
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