Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 1993
The theory of thermal radiation forces is extended to the local interactions occurring among phon... more The theory of thermal radiation forces is extended to the local interactions occurring among phonons and the material particles of a liquid, also in the absence of an external temperature gradient. In a solution, energy and momentum can be transferred by an impinging phonon to a particle, or the latter may perform work on the first, shifting it to a
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 1994
... The notion of momentum carried by electromagnetic 1063-65 1X/94/49(1)/433(12)/$06.00 PHYSICAL... more ... The notion of momentum carried by electromagnetic 1063-65 1X/94/49(1)/433(12)/$06.00 PHYSICAL REVIEW E JANUARY 1994 49 433 t/,'- 1994 The American Physical Society FS GAETA, C. ALBANESE, DG MITA, AND F. PELUSO waves, however ... [21] DI Mash, VS Starunov ...
The kinship between liquids and solids, advocated by the similarity of the respective densities, ... more The kinship between liquids and solids, advocated by the similarity of the respective densities, did not lead, until now, to a theory of transport processes in liquids in analogy to the phonon theory of solids. The ubiquitous presence of scattering centers due to the disordered structure of fluids makes a quantitative appraisal of energy and momentum exchange in the course of phonon-particle interactions pivotal for such an approach. The new physical concepts of radiant vector and of thermal radiation force provide the appropriate fundamentals for a quantitative treatment. The experimental foundations of the proposed theory reside in a clear-cut assessment and in the appropriate measurement of thermal radiation forces in the appropriate material system. For reasons discussed here such an unambiguous result may be only obtained in conditions of reduced gravity.
Bisphenol A (BPA) is a xenobiotic endocrine disrupting chemical. In vitro and in vivo studies hav... more Bisphenol A (BPA) is a xenobiotic endocrine disrupting chemical. In vitro and in vivo studies have indicated that BPA alters endocrine-metabolic pathways in adipose tissue increasing the risk of developing metabolic disorders and obesity. BPA can affect adipose tissue increasing fat cells number or size by regulating the expression of the genes directly involved in metabolic homeostasis and obesity. Several studies performed in animal models accounted for an obesogen role of BPA, while the effects on human adipocytes - especially in children - have been poorly investigated. The aim of this study is to understand the molecular mechanisms by which environmentally relevant doses of BPA can interfere with canonical endocrine function that regulates metabolism in mature human adipocytes from pre-pubertal non-obese children. BPA can act as estrogen agonist or antagonist depending on the physiological context. To identify molecular signatures associated to metabolism, transcriptional modif...
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, Jan 4, 2015
The degradation and mineralization of the nonionic surfactant octylphenol ethoxylate (OPEO), comm... more The degradation and mineralization of the nonionic surfactant octylphenol ethoxylate (OPEO), commercially known as Triton™ X-45, by the peroxymonosulfate (PMS)/UV-C process were investigated. Three different toxicity tests (Daphnia magna, Vibrio fischeri and Pseudokirchneriella subcapitata) as well as the Yeast Estrogen Screen (YES) bioassay were undertaken to evaluate the potential toxic and estrogenic effects of OPEO and its oxidation products. OPEO removal was very fast and complete after 7 min via PMS/UV-C treatment under the investigated reaction conditions (OPEO = 20 mg L(-1) (47 μM); TOC = 12 mg L(-1); PMS = 2.5 mM; initial reaction pH = 6.5; applied UV-C dose = 21 Wh L(-1)). TOC removal also proceeded rapidly; a gradual decrease was observed resulting in an overall TOC removal of 84%. The toxic responses of PMS/UV-C treated OPEO solutions varied according to the test organism used in the bioassay. Daphnia magna was found to be most sensitive to aqueous OPEO, whereas Pseudoki...
Biophotonics: Photonic Solutions for Better Health Care II, 2010
ABSTRACT The investigation of materials suitable for enzyme immobilization in biosensing applicat... more ABSTRACT The investigation of materials suitable for enzyme immobilization in biosensing applications has a widespread interest. There are many studies on physico-chemical properties of these materials at macroscopic level but few studies have been devoted to examine and correlate these properties at microscopic level. FT-IR spectroscopy with Micro-Attenuated Total Reflection (Micro-ATR) approach can be extremely useful for understanding a variety of aspects of materials which can be used for optimising immobilization procedures. Moreover, this experimental approach is particularly simple to use (no sample preparation is required) and minimally invasive. Using a Perkin Elmer Spectrum One FT-IR spectrometer equipped with a mercury-cadmium-telluride detector and a micro-ATR element we investigated different materials used for immobilization procedures with various enzymes widely used for biosensing in environmental and clinical applications. In particular, composite membranes constituted by a chemically modified poly-acrylonitrile (PAN) membrane plus layers of tethered chitosan of different molecular weight have been examined. Also silica gel matrices without and with glucose oxidase have been investigated. Spectra have been analysed and the contribution of principal functional groups has been evidenced.
ABSTRACT Laccases are cuproproteins belonging to the group of oxidoreductases that are able to ca... more ABSTRACT Laccases are cuproproteins belonging to the group of oxidoreductases that are able to catalyze the oxidation of various aromatic compounds (particularly phenols) with the concomitant reduction of oxygen to water. They are characterized by low substrate specificity and have a catalytic competence which widely varies depending on the source. Additionally, laccases have also very peculiar optical properties due to their copper active sites which participate to the reduction processes. All these characteristics make laccases very flexible biotic element for biotechnological applications. During the years, a number of studies have been devoted at exploiting catalytic properties of laccases and very few at profiting of their optical properties. Some preliminary studies by absorption, fluorescence FT-IR and Raman spectroscopies of commercial laccases have evidenced their potential usefulness for optical biosensing of phenol compounds as cathecol. Moreover the sol-gel process offers a convenient and versatile method for preparing optically transparent matrices at room temperature that can represent a very convenient support for laccase immobilization. Also for immobilised enzymes the above-mentioned techniques have allowed a detailed characterization of their optical properties that confirmed the potentials of laccases in optical biosensors and represented a fundamental step in the designing of an optimised optical biosensing scheme.
The aim of the present study is to ascertain whether transmembrane temperature gradients couple w... more The aim of the present study is to ascertain whether transmembrane temperature gradients couple with transport of electric charge in living cells of Valonia utricularis and eventually measure the thermodynamic coupling coefficient (s). Simple experimental procedures are described that allow generation of temperature gradients of predetermined sense and intensity across the cell membrane. Simultaneous measurement of the potential difference is ensured by standard electrophysiological methods. The mathematical expressions that allow quantitative treatment of experimental results are indicated in the article and are based on standard nonequilibrium thermodynamic and electrophysiological formalism. The value of the coupling coefficient between temperature gradient and flow of electric charge is indicated and concisely discussed in terms of possible mechanisms of ionic membrane transport.
2014 Fotonica AEIT Italian Conference on Photonics Technologies, 2014
ABSTRACT Biodegradable polymer nanoparticles have recently received considerable attention for dr... more ABSTRACT Biodegradable polymer nanoparticles have recently received considerable attention for drug delivery. One of the most investigated system is represented by cisplatin-loaded poly-(D, L-lactic-co-glycolic)acid (PLGA) nanoparticles. FT-IR microspectroscopy has been used for characterizing these particles. In addition an univariate analysis procedure has been adopted for interpreting experimental results when the spectrum modifications are relatively weak.
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 1993
The theory of thermal radiation forces is extended to the local interactions occurring among phon... more The theory of thermal radiation forces is extended to the local interactions occurring among phonons and the material particles of a liquid, also in the absence of an external temperature gradient. In a solution, energy and momentum can be transferred by an impinging phonon to a particle, or the latter may perform work on the first, shifting it to a
Physical review. E, Statistical physics, plasmas, fluids, and related interdisciplinary topics, 1994
... The notion of momentum carried by electromagnetic 1063-65 1X/94/49(1)/433(12)/$06.00 PHYSICAL... more ... The notion of momentum carried by electromagnetic 1063-65 1X/94/49(1)/433(12)/$06.00 PHYSICAL REVIEW E JANUARY 1994 49 433 t/,'- 1994 The American Physical Society FS GAETA, C. ALBANESE, DG MITA, AND F. PELUSO waves, however ... [21] DI Mash, VS Starunov ...
The kinship between liquids and solids, advocated by the similarity of the respective densities, ... more The kinship between liquids and solids, advocated by the similarity of the respective densities, did not lead, until now, to a theory of transport processes in liquids in analogy to the phonon theory of solids. The ubiquitous presence of scattering centers due to the disordered structure of fluids makes a quantitative appraisal of energy and momentum exchange in the course of phonon-particle interactions pivotal for such an approach. The new physical concepts of radiant vector and of thermal radiation force provide the appropriate fundamentals for a quantitative treatment. The experimental foundations of the proposed theory reside in a clear-cut assessment and in the appropriate measurement of thermal radiation forces in the appropriate material system. For reasons discussed here such an unambiguous result may be only obtained in conditions of reduced gravity.
Bisphenol A (BPA) is a xenobiotic endocrine disrupting chemical. In vitro and in vivo studies hav... more Bisphenol A (BPA) is a xenobiotic endocrine disrupting chemical. In vitro and in vivo studies have indicated that BPA alters endocrine-metabolic pathways in adipose tissue increasing the risk of developing metabolic disorders and obesity. BPA can affect adipose tissue increasing fat cells number or size by regulating the expression of the genes directly involved in metabolic homeostasis and obesity. Several studies performed in animal models accounted for an obesogen role of BPA, while the effects on human adipocytes - especially in children - have been poorly investigated. The aim of this study is to understand the molecular mechanisms by which environmentally relevant doses of BPA can interfere with canonical endocrine function that regulates metabolism in mature human adipocytes from pre-pubertal non-obese children. BPA can act as estrogen agonist or antagonist depending on the physiological context. To identify molecular signatures associated to metabolism, transcriptional modif...
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, Jan 4, 2015
The degradation and mineralization of the nonionic surfactant octylphenol ethoxylate (OPEO), comm... more The degradation and mineralization of the nonionic surfactant octylphenol ethoxylate (OPEO), commercially known as Triton™ X-45, by the peroxymonosulfate (PMS)/UV-C process were investigated. Three different toxicity tests (Daphnia magna, Vibrio fischeri and Pseudokirchneriella subcapitata) as well as the Yeast Estrogen Screen (YES) bioassay were undertaken to evaluate the potential toxic and estrogenic effects of OPEO and its oxidation products. OPEO removal was very fast and complete after 7 min via PMS/UV-C treatment under the investigated reaction conditions (OPEO = 20 mg L(-1) (47 μM); TOC = 12 mg L(-1); PMS = 2.5 mM; initial reaction pH = 6.5; applied UV-C dose = 21 Wh L(-1)). TOC removal also proceeded rapidly; a gradual decrease was observed resulting in an overall TOC removal of 84%. The toxic responses of PMS/UV-C treated OPEO solutions varied according to the test organism used in the bioassay. Daphnia magna was found to be most sensitive to aqueous OPEO, whereas Pseudoki...
Biophotonics: Photonic Solutions for Better Health Care II, 2010
ABSTRACT The investigation of materials suitable for enzyme immobilization in biosensing applicat... more ABSTRACT The investigation of materials suitable for enzyme immobilization in biosensing applications has a widespread interest. There are many studies on physico-chemical properties of these materials at macroscopic level but few studies have been devoted to examine and correlate these properties at microscopic level. FT-IR spectroscopy with Micro-Attenuated Total Reflection (Micro-ATR) approach can be extremely useful for understanding a variety of aspects of materials which can be used for optimising immobilization procedures. Moreover, this experimental approach is particularly simple to use (no sample preparation is required) and minimally invasive. Using a Perkin Elmer Spectrum One FT-IR spectrometer equipped with a mercury-cadmium-telluride detector and a micro-ATR element we investigated different materials used for immobilization procedures with various enzymes widely used for biosensing in environmental and clinical applications. In particular, composite membranes constituted by a chemically modified poly-acrylonitrile (PAN) membrane plus layers of tethered chitosan of different molecular weight have been examined. Also silica gel matrices without and with glucose oxidase have been investigated. Spectra have been analysed and the contribution of principal functional groups has been evidenced.
ABSTRACT Laccases are cuproproteins belonging to the group of oxidoreductases that are able to ca... more ABSTRACT Laccases are cuproproteins belonging to the group of oxidoreductases that are able to catalyze the oxidation of various aromatic compounds (particularly phenols) with the concomitant reduction of oxygen to water. They are characterized by low substrate specificity and have a catalytic competence which widely varies depending on the source. Additionally, laccases have also very peculiar optical properties due to their copper active sites which participate to the reduction processes. All these characteristics make laccases very flexible biotic element for biotechnological applications. During the years, a number of studies have been devoted at exploiting catalytic properties of laccases and very few at profiting of their optical properties. Some preliminary studies by absorption, fluorescence FT-IR and Raman spectroscopies of commercial laccases have evidenced their potential usefulness for optical biosensing of phenol compounds as cathecol. Moreover the sol-gel process offers a convenient and versatile method for preparing optically transparent matrices at room temperature that can represent a very convenient support for laccase immobilization. Also for immobilised enzymes the above-mentioned techniques have allowed a detailed characterization of their optical properties that confirmed the potentials of laccases in optical biosensors and represented a fundamental step in the designing of an optimised optical biosensing scheme.
The aim of the present study is to ascertain whether transmembrane temperature gradients couple w... more The aim of the present study is to ascertain whether transmembrane temperature gradients couple with transport of electric charge in living cells of Valonia utricularis and eventually measure the thermodynamic coupling coefficient (s). Simple experimental procedures are described that allow generation of temperature gradients of predetermined sense and intensity across the cell membrane. Simultaneous measurement of the potential difference is ensured by standard electrophysiological methods. The mathematical expressions that allow quantitative treatment of experimental results are indicated in the article and are based on standard nonequilibrium thermodynamic and electrophysiological formalism. The value of the coupling coefficient between temperature gradient and flow of electric charge is indicated and concisely discussed in terms of possible mechanisms of ionic membrane transport.
2014 Fotonica AEIT Italian Conference on Photonics Technologies, 2014
ABSTRACT Biodegradable polymer nanoparticles have recently received considerable attention for dr... more ABSTRACT Biodegradable polymer nanoparticles have recently received considerable attention for drug delivery. One of the most investigated system is represented by cisplatin-loaded poly-(D, L-lactic-co-glycolic)acid (PLGA) nanoparticles. FT-IR microspectroscopy has been used for characterizing these particles. In addition an univariate analysis procedure has been adopted for interpreting experimental results when the spectrum modifications are relatively weak.
Uploads
Papers by Damiano Mita