I am an Emeritus Professor at the Charles Gerhardt Institute of Materials (ICGM) and ENSCM, in Montpellier, France.My research and expertise are in the field of nanoparticles and interface as well as in UV-Visible-NIR spectroscopy and luminescence.
... Practice, Pergamon, Oxford, 1977, p. 46. 15 MA Martin, M. Ballesteros and B. del Castillo, An... more ... Practice, Pergamon, Oxford, 1977, p. 46. 15 MA Martin, M. Ballesteros and B. del Castillo, Anal. Chim. Acta, 170 (1985) 95. 16 MW Davidson, BG Griggs, DW Boykin and WD Wilson, Nature, 254 (1975) 632. 17 J. Ezquerra, R. Rotger ...
Cassava starch was treated with lactic acid and exposed to U.V. irradiation. The aim of present w... more Cassava starch was treated with lactic acid and exposed to U.V. irradiation. The aim of present work concerns the evaluation of photochemical treatment on cassava starch both at structural and functional levels. Acidification and U.V. exposition, especially lights with emition at 250 nm, resulted in intrinsic viscosity and Mn decrease and in baking expansion ability increase. Cassava starch spectrum had peaks at 240-260 nm, suggesting the presence a chromophore active at 250 nm. Dough weight, temperature and expansion were monitored during baking. It appeared that expansion occurred after starch gelatinization due to water evaporation.
1. Bull Soc Chim Fr. 1970 May;5:1968-74. [Luminescence and photoreactivity in the vitamin A serie... more 1. Bull Soc Chim Fr. 1970 May;5:1968-74. [Luminescence and photoreactivity in the vitamin A series. Quantitative study]. [Article in French]. Lerner DA, Mani JC, Mousseron-Canet M. PMID: 5500120 [PubMed - indexed for MEDLINE].
Fluorescence depolarization experiments performed on labaled poly‐L‐proline Forme II suggest the ... more Fluorescence depolarization experiments performed on labaled poly‐L‐proline Forme II suggest the occurrence of aggrgation in water while 6M guanidinium‐HCl induces dissociation. The solvent 4M CaCl2 results in a reduction of polymer structural orgganization. These findings corroborate suggestion of polyproline aggregation and solution behavior in aqueous neutral salt solytion (see preceding article).
Abstract Two-dimensional TLC coupled to fluorescence analysis by CCD video camera is a sensitive,... more Abstract Two-dimensional TLC coupled to fluorescence analysis by CCD video camera is a sensitive, precise, and rapid method for the study of complexes which contain at least one fluorescent component. The method applied to the diphenylhexatriene β-cyclodextrin complex in water/acetonitrile system enables the separation of free and bound DPH and an accurate estimation of their respective quantities on the plate. Free DPH eluted by the hydrocarbon media was evaluated by the emitted fluorescence intensity by comparison with the linear 0 to 50 picomoles calibration scale. DPH bound to BCD was dissociated with a brief polar migration followed by elution with a non polar solvent mixture and evaluated as above. The balance of the free and/or dissociated fluorophore is maintained equal in every section of the TLC.
... Practice, Pergamon, Oxford, 1977, p. 46. 15 MA Martin, M. Ballesteros and B. del Castillo, An... more ... Practice, Pergamon, Oxford, 1977, p. 46. 15 MA Martin, M. Ballesteros and B. del Castillo, Anal. Chim. Acta, 170 (1985) 95. 16 MW Davidson, BG Griggs, DW Boykin and WD Wilson, Nature, 254 (1975) 632. 17 J. Ezquerra, R. Rotger ...
Cassava starch was treated with lactic acid and exposed to U.V. irradiation. The aim of present w... more Cassava starch was treated with lactic acid and exposed to U.V. irradiation. The aim of present work concerns the evaluation of photochemical treatment on cassava starch both at structural and functional levels. Acidification and U.V. exposition, especially lights with emition at 250 nm, resulted in intrinsic viscosity and Mn decrease and in baking expansion ability increase. Cassava starch spectrum had peaks at 240-260 nm, suggesting the presence a chromophore active at 250 nm. Dough weight, temperature and expansion were monitored during baking. It appeared that expansion occurred after starch gelatinization due to water evaporation.
1. Bull Soc Chim Fr. 1970 May;5:1968-74. [Luminescence and photoreactivity in the vitamin A serie... more 1. Bull Soc Chim Fr. 1970 May;5:1968-74. [Luminescence and photoreactivity in the vitamin A series. Quantitative study]. [Article in French]. Lerner DA, Mani JC, Mousseron-Canet M. PMID: 5500120 [PubMed - indexed for MEDLINE].
Fluorescence depolarization experiments performed on labaled poly‐L‐proline Forme II suggest the ... more Fluorescence depolarization experiments performed on labaled poly‐L‐proline Forme II suggest the occurrence of aggrgation in water while 6M guanidinium‐HCl induces dissociation. The solvent 4M CaCl2 results in a reduction of polymer structural orgganization. These findings corroborate suggestion of polyproline aggregation and solution behavior in aqueous neutral salt solytion (see preceding article).
Abstract Two-dimensional TLC coupled to fluorescence analysis by CCD video camera is a sensitive,... more Abstract Two-dimensional TLC coupled to fluorescence analysis by CCD video camera is a sensitive, precise, and rapid method for the study of complexes which contain at least one fluorescent component. The method applied to the diphenylhexatriene β-cyclodextrin complex in water/acetonitrile system enables the separation of free and bound DPH and an accurate estimation of their respective quantities on the plate. Free DPH eluted by the hydrocarbon media was evaluated by the emitted fluorescence intensity by comparison with the linear 0 to 50 picomoles calibration scale. DPH bound to BCD was dissociated with a brief polar migration followed by elution with a non polar solvent mixture and evaluated as above. The balance of the free and/or dissociated fluorophore is maintained equal in every section of the TLC.
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Papers by Dan Lerner