L'invention concerne l'utilisation d'une forme a tres faible dose de l'acide absc... more L'invention concerne l'utilisation d'une forme a tres faible dose de l'acide abscisique (ABA) ou d'un conjugue hydrolysable in vivo de celui-ci, de preference l'ester ABA-glucosylique (ABA-GE), pour une utilisation nutraceutique/therapeutique dans la lutte et/ou la prevention de l'hyperglycemie et la prise de poids en reponse a l'apport de sucre avec une reduction de la secretion d'insuline et une augmentation des performances musculaires.
This research aimed to study the chemical composition of Aloysia citrodora methanolic extract and... more This research aimed to study the chemical composition of Aloysia citrodora methanolic extract and its biological activities as an antioxidant, and its antibacterial, antifungal and anti-inflammatory activities based on four bioclimatic collection stages. The contents of total phenols, total flavonoids and total tannins were determined. Nine phenolic compounds were identified by LC-DAD–ESI-MS/MS. The major compound was acteoside, a phenylpropanoid which represented about 80% of the methanolic fraction in the various regions. The antioxidant activities of different locations were measured by different analytical assays, such as DPPH, ABTS and iron reducing power. The results showed that phenolic compounds and antioxidant activities varied with climatic and environmental factors. Moreover, there was a significant dependency between regions and biological activities. The use of a principal component analysis showed that there was a close relationship among phenylpropanoids, phenolic com...
Two traditional Chinese medicines (Phlomis umbrosa Turcz. and Phlomis megalantha Diels), as well ... more Two traditional Chinese medicines (Phlomis umbrosa Turcz. and Phlomis megalantha Diels), as well as five pure phenolic compounds (protocatechic, chlorogenic, benzoic, rosmarinic acid, and rutin) have been studied for antioxidant activities in acetone and methanol extracts from leaves. An HPLC method was developed to quantify the amounts of 14 phenolic compounds in the leaf extracts. The antioxidant capacities of the studied species are high. Almost all samples were capable of directly scavenging DPPH and superoxide free radicals, inhibiting linoleic acid oxidation, acting as reducing agents, and reducing plasmid DNA damage induced by hydroxyl radicals. Among different extracts, the acetone extract of P. megalantha exhibited the highest antioxidant activity. The major phenolic compounds identified were protocatechic, chlorogenic, caffeic, rosmarinic acid, and (−)-epicatechin. Antioxidant activities of pure compounds and correlation analysis indicated that protocatechic and rosmarinic acids were the major contributors to the observed antioxidant activities of the investigated Phlomis extracts. To cite this article: Y. Zhang, Z.-z. Wang, C. R. Biologies 332 (2009).
The Chemical Engineering Journal, 26 (1983) 33 39 Numerical Simulation of Multicomponent Ion Exch... more The Chemical Engineering Journal, 26 (1983) 33 39 Numerical Simulation of Multicomponent Ion Exchange Operations DIEGO BARBA, GIOVANNI DEL RE and PIER UGO FOSCOLO Istituto di Chimica Applicata ed Industriale, Universita degli Studi, 67100 L'Aquila (Italy) ...
The purpose of this work, carried out within the European community Joule Program, is to collect ... more The purpose of this work, carried out within the European community Joule Program, is to collect new reliable experimental data of phase equilibria of synthetic mixtures a supercritical or near critical solvent, water and an organic product to be recovered from the aqueous solution. These data are required for the development and quantitative testing of predictive phase equilibria model, including generalized group contribution models, to be applied near the critical conditions of one or more component mixture. The experimental apparatuses used to perform the experimental measurements are described together with some results obtained.
ABSTRACT The present work concerns the biological treatment of a starch wastewater, coupled with ... more ABSTRACT The present work concerns the biological treatment of a starch wastewater, coupled with the production of microbial biomass and glucoamylase. Every unit operation of the process was tested in a laboratory scale, in order to perform a feasibility analysis. Fermentation tests confirmed that a stirring rate of 300 rpm was the optimum (in the investigated range) as concerns biomass growth and enzyme activity. Ultrafiltration tests showed that the best operating conditions in the investigated range for enzyme recovery were: temperature 25°C, transmembrane pressure 100 kPa, membrane cut off 30 kDa. Diafiltration tests evidenced that an effective enzyme washing (about 85% reduction of chemical oxygen demand) was achieved with 3 volumes of water per volume of feed and no significant enzyme deactivation was observed.
The solubility of pure essential oil components and their binary mixtures in supercritical carbon... more The solubility of pure essential oil components and their binary mixtures in supercritical carbon dioxide was correlated using an equation of state with density-dependent mixing rules. This equation was then used to predict the phase diagram of the two binary carbon dioxidelimonene ...
... DIOXIDE * Enrique Martinez de la Ossa , Vincenzo Brandani, Giovanni Del Re, Gabriele Di Giaco... more ... DIOXIDE * Enrique Martinez de la Ossa , Vincenzo Brandani, Giovanni Del Re, Gabriele Di Giacono ... However the pressure de pendence of our selectivity is different from that found by ... Smith, 1980; International Critical Tables, 1928; Kennedy and Thodos, 1960; Medici, 1969 ) of ...
L'invention concerne l'utilisation d'une forme a tres faible dose de l'acide absc... more L'invention concerne l'utilisation d'une forme a tres faible dose de l'acide abscisique (ABA) ou d'un conjugue hydrolysable in vivo de celui-ci, de preference l'ester ABA-glucosylique (ABA-GE), pour une utilisation nutraceutique/therapeutique dans la lutte et/ou la prevention de l'hyperglycemie et la prise de poids en reponse a l'apport de sucre avec une reduction de la secretion d'insuline et une augmentation des performances musculaires.
This research aimed to study the chemical composition of Aloysia citrodora methanolic extract and... more This research aimed to study the chemical composition of Aloysia citrodora methanolic extract and its biological activities as an antioxidant, and its antibacterial, antifungal and anti-inflammatory activities based on four bioclimatic collection stages. The contents of total phenols, total flavonoids and total tannins were determined. Nine phenolic compounds were identified by LC-DAD–ESI-MS/MS. The major compound was acteoside, a phenylpropanoid which represented about 80% of the methanolic fraction in the various regions. The antioxidant activities of different locations were measured by different analytical assays, such as DPPH, ABTS and iron reducing power. The results showed that phenolic compounds and antioxidant activities varied with climatic and environmental factors. Moreover, there was a significant dependency between regions and biological activities. The use of a principal component analysis showed that there was a close relationship among phenylpropanoids, phenolic com...
Two traditional Chinese medicines (Phlomis umbrosa Turcz. and Phlomis megalantha Diels), as well ... more Two traditional Chinese medicines (Phlomis umbrosa Turcz. and Phlomis megalantha Diels), as well as five pure phenolic compounds (protocatechic, chlorogenic, benzoic, rosmarinic acid, and rutin) have been studied for antioxidant activities in acetone and methanol extracts from leaves. An HPLC method was developed to quantify the amounts of 14 phenolic compounds in the leaf extracts. The antioxidant capacities of the studied species are high. Almost all samples were capable of directly scavenging DPPH and superoxide free radicals, inhibiting linoleic acid oxidation, acting as reducing agents, and reducing plasmid DNA damage induced by hydroxyl radicals. Among different extracts, the acetone extract of P. megalantha exhibited the highest antioxidant activity. The major phenolic compounds identified were protocatechic, chlorogenic, caffeic, rosmarinic acid, and (−)-epicatechin. Antioxidant activities of pure compounds and correlation analysis indicated that protocatechic and rosmarinic acids were the major contributors to the observed antioxidant activities of the investigated Phlomis extracts. To cite this article: Y. Zhang, Z.-z. Wang, C. R. Biologies 332 (2009).
The Chemical Engineering Journal, 26 (1983) 33 39 Numerical Simulation of Multicomponent Ion Exch... more The Chemical Engineering Journal, 26 (1983) 33 39 Numerical Simulation of Multicomponent Ion Exchange Operations DIEGO BARBA, GIOVANNI DEL RE and PIER UGO FOSCOLO Istituto di Chimica Applicata ed Industriale, Universita degli Studi, 67100 L'Aquila (Italy) ...
The purpose of this work, carried out within the European community Joule Program, is to collect ... more The purpose of this work, carried out within the European community Joule Program, is to collect new reliable experimental data of phase equilibria of synthetic mixtures a supercritical or near critical solvent, water and an organic product to be recovered from the aqueous solution. These data are required for the development and quantitative testing of predictive phase equilibria model, including generalized group contribution models, to be applied near the critical conditions of one or more component mixture. The experimental apparatuses used to perform the experimental measurements are described together with some results obtained.
ABSTRACT The present work concerns the biological treatment of a starch wastewater, coupled with ... more ABSTRACT The present work concerns the biological treatment of a starch wastewater, coupled with the production of microbial biomass and glucoamylase. Every unit operation of the process was tested in a laboratory scale, in order to perform a feasibility analysis. Fermentation tests confirmed that a stirring rate of 300 rpm was the optimum (in the investigated range) as concerns biomass growth and enzyme activity. Ultrafiltration tests showed that the best operating conditions in the investigated range for enzyme recovery were: temperature 25°C, transmembrane pressure 100 kPa, membrane cut off 30 kDa. Diafiltration tests evidenced that an effective enzyme washing (about 85% reduction of chemical oxygen demand) was achieved with 3 volumes of water per volume of feed and no significant enzyme deactivation was observed.
The solubility of pure essential oil components and their binary mixtures in supercritical carbon... more The solubility of pure essential oil components and their binary mixtures in supercritical carbon dioxide was correlated using an equation of state with density-dependent mixing rules. This equation was then used to predict the phase diagram of the two binary carbon dioxidelimonene ...
... DIOXIDE * Enrique Martinez de la Ossa , Vincenzo Brandani, Giovanni Del Re, Gabriele Di Giaco... more ... DIOXIDE * Enrique Martinez de la Ossa , Vincenzo Brandani, Giovanni Del Re, Gabriele Di Giacono ... However the pressure de pendence of our selectivity is different from that found by ... Smith, 1980; International Critical Tables, 1928; Kennedy and Thodos, 1960; Medici, 1969 ) of ...
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