title: Studies of tropical fruit ripening using three different spectroscopic techniques.
abstract: We present a noninvasive method to study fruit ripening. The method is based on the combination of reflectance and fluorescence spectroscopies, as well as gas in scattering media absorption spectroscopy (GASMAS). Chlorophyll and oxygen are two of the most important constituents in the fruit ripening process. Reflectance and fluorescence spectroscopies were used to quantify the changes of chlorophyll and other chromophores. GASMAS, based on tunable diode laser absorption spectroscopy, was used to measure free molecular oxygen in the fruit tissue at 760 nm, based on the fact that the free gases have much narrower spectral imprints than those of solid materials. The fruit maturation and ripening processes can be followed by studying the changes of chlorophyll and oxygen contents with these three techniques.
authors.affiliation: South China Normal University, Center for Optical and Electromagnetic Research, University City Campus, Research Building 5, 510006 Guangzhou, China.
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang
authors.affiliation: South China Normal University, Center for Optical and Electromagnetic Research, University City Campus, Research Building 5, 510006 Guangzhou, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Huang
authors.affiliation: South China Normal University, Center for Optical and Electromagnetic Research, University City Campus, Research Building 5, 510006 Guangzhou, China.
authors.forename: Tianqi
authors.initials: T
authors.lastname: Li
authors.affiliation: South China Normal University, Center for Optical and Electromagnetic Research, University City Campus, Research Building 5, 510006 Guangzhou, China.
authors.forename: Xiuxiang
authors.initials: X
authors.lastname: Wu
authors.affiliation: South China Normal University, Center for Optical and Electromagnetic Research, University City Campus, Research Building 5, 510006 Guangzhou, ChinabLund University, Lund Laser Center, SE-221 00 Lund, Sweden.
authors.forename: Sune
authors.initials: S
authors.lastname: Svanberg
authors.affiliation: South China Normal University, Center for Optical and Electromagnetic Research, University City Campus, Research Building 5, 510006 Guangzhou, ChinabLund University, Lund Laser Center, SE-221 00 Lund, Sweden.
authors.forename: Katarina
authors.initials: K
authors.lastname: Svanberg
mesh_terms: D002734:Chlorophyll / Q000737:chemistry; D005638:Fruit / Q000502:physiology*; D005740:Gases; D007834:Lasers; D008027:Light; D010100:Oxygen / Q000737:chemistry*; D012542:Scattering, Radiation; D013050:Spectrometry, Fluorescence / Q000379:methods*; D013053:Spectrophotometry / Q000379:methods*
chemical_list: D005740:Gases; D002734:Chlorophyll; D010100:Oxygen