Dissertation > Excellent graduate degree dissertation topics show

The Detection Method of Mycotoxin in Food Based on Three-dimensional Fluorescence Spectrometry

Author: DuYangFeng
Tutor: DuShuXin
School: Zhejiang University
Course: Pattern Recognition and Intelligent Systems
Keywords: Three-dimensional fluorescence spectroscopy Polynomial fitting filtering Fourier analysis Differential spectra Convex domain Cluster analysis
CLC: TS207.4
Type: Master's thesis
Year: 2011
Downloads: 137
Quote: 0
Read: Download Dissertation

Abstract


Mycotoxins , toxic pollution high frequency of detection of mycotoxins in food in recent years become the focus of research in the field of trace detection . Dimensional fluorescence spectra can also describe the fluorescence intensity with excitation and emission wavelength changes the relationship , fully embodies the fluorescence characteristics of the material , is a valuable spectral fingerprint technology . Therefore , the application of three-dimensional fluorescence spectrum mycotoxins detection is feasible . However, based on three-dimensional fluorescence spectroscopy data processing method rarely reported in the literature , used in the two-dimensional spectral smoothing preprocessing spectra normalized baseline drift removal , the choice of the characteristic spectral method does not apply to the three-dimensional fluorescence spectroscopy Therefore, this paper based on three-dimensional fluorescence spectroscopy data smoothing , the differential spectrum access and information area extraction method , and actually used liquor mycotoxins detection , specific following aspects : 1 . draw on the image smoothing method of processing , the polynomial fitting filtering , Fourier analysis of three-dimensional fluorescence spectral smoothing method to mean filtering , median filtering , in addition to the three-dimensional fluorescence spectrum of the high-frequency interference noise and white noise . The derivative spectra eliminate baseline drift , and strengthen the characteristics of the band , the first derivative of the three - dimensional fluorescence spectroscopy and second derivative spectra . Based polynomial fitting - first derivative spectra and second derivative spectra calculated for three-dimensional fluorescence spectroscopy . For three-dimensional fluorescence spectroscopy data dimension , the large amount of data can not be based on a priori knowledge and the naked eye to determine the position of the status quo of the information area , and three-dimensional fluorescence data to determine the method and cluster analysis based on convex domains region extraction method reduce data dimension , the exclusion of information unrelated area . 4 In this paper, the above method is applied to the experimental analysis of the sample group of mycotoxins B1 liquor results confirmed the validity of the results of this study .

Related Dissertations

  1. Development of EST-SSR Primers and Application in Analysis of Genetic Realtionships in Tree Peony,S685.11
  2. Pre-hypertension syndrome characteristics,R259
  3. Comprehensive Quality Assessment of College Students,G645.5
  4. Studieson Effects of Soybean Species on Yuba and Initial Establishment of Quality Evalution System for Yuba,TS214.2
  5. ISSR Analysis of Genetic Diversity on 21 Lotus(Nelumbo Nucifera) Cultivars,S682.32
  6. Research on the Soil Environmental Function Zoning,X321
  7. Comparison of Gene Expression Data Cluster Methods and Gene Network Construction for Phytophthora Sojae Genes,S435.651
  8. Study on Heterosis and Genetic Basis of Soybean,S565.1
  9. Evaluation on Forage Quality and Biomass Energy Characters of Inbred Vegetative Lines of Napier Grass,S543.9
  10. Clustering Method Research Based on Divided and Conquered Method,TP311.13
  11. Elements of Thirty Kinds of Proprietary Chinese Medicines and Classification Based on Elements,R286.0
  12. Community-oriented education, personalized learning system and its implementation,TP391.6
  13. Design to E-learning System in Senior Vocational School Base on Moodle,TP311.52
  14. Research on Cultural Industrial Competitiveness of Chong Qing,F224
  15. The Research of Prairie Road Light Environment Effects on Physiological Indicators of Drivers,U491.254
  16. Improved Mathematical Model of Spatial Information Processing Based on Fuzzy Technology,O159
  17. Based embedded software fault-tolerant data flow anomaly detection,TP368.1
  18. Research on Classification of Colleges in Our Country Based on Clustering Technology of Data Mining,TP311.13
  19. Research on the Platform for Clustering Graph Data and Its Implementation,TP311.13
  20. Comparative Study on Economic Development of City Circle Based on Data Mining,O212.1
  21. The Design and Implementation of PGIS on Intelligent Mobile Terminal,TN929.53

CLC: > Industrial Technology > Light industry,handicrafts > Food Industry > General issues > Food standards and testing > Microbiological testing of food
© 2012 www.DissertationTopic.Net  Mobile