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Effect of Acid Treatment on Interfacial and Foam Properties of Soy Proteins

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Journal of Food Science and Engineering 2015年第1期5卷 1-13页

作者： Cecilia Abirached Claudia Alejandra Medrano Patrick Moyna maria cristina anon Luis Alberto Panizzolo Departamento de Ciencia y Tecnologia de los Alimentos Facultad de Quimica Universidad de la Republica Montevideo 11800 Uruguay Food Criotechnology Research and Development Center (CCT-UNLP) School of Exact Sciences National University of La Plata(UNLP) La Plata 1900 Argentina

The goal of the present work was to study the effects of acid treatment on the foaming properties of a soybean protein isolate （SPI） and its fractions, glycinin （11S） and β-conglycinin （7S）. The structural characteristics, interfacial properties, foaming capacity and stability of the treated proteins were studied. Results from surface hydrophobicity and differential scanning calorimetry （DSC） showed that the acid treatment caused the complete denaturation of 11S and a partial denaturation of 7S. This protein unfolding affected their interracial properties, which led to an improvement in the foaming properties of both protein fractions and isolate. Treated 7S showed the best behavior in the rearrangement process, probably due to its smaller size and its modified structural characteristics. All treated proteins showed stronger interracial films. The foams of treated proteins were destabilized mostly due to gravitational drainage rather than Ostwald ripening.

关键词： Soy proteins foams gravitational drainage Ostwald ripening.

Comparison of Interfacial and Foaming Properties of Soy and Whey Protein Isolates

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Journal of Food Science and Engineering 2012年第7期2卷 376-381页

作者： Cecilia Abirached Claudia Alejandra Medrano Aria Claudia Araujo Patrick Moyna maria cristina anon Luis Alberto Panizzolo Food Science and Technology Departament Facultad de Quimica Universidad de la Republiea Montevideo 11800 Uruguay DEPTEQ Facultad de Quimica Universidad de la Republica Montevideo 11800 Uruguay CIDCA-CONICET- UNLP La Plata 1900 Argentina

A comparative study on the foaming properties and behavior at the air-water interface of soy and whey protein isolates were made, Foams were obtained by the method of gas bubbling. The initial rate of passage of liquid to the foam （vi） and the maximum volume of liquid incorporated to the foam （VLEmax） were determined. The destabilization process of the formed foams was analyzed by a biphasic second order equation. Measurements of equilibrium surface tension （water/air） and surface rheological properties were carried out in a dynamic drop tensiometer. The foaming capacity （vi and VLEmax） and the stability of foams prepared with the whey protein isolates （WPI） were better than those formulated with the soy protein isolates （SPI）. WPI foams were more stable showing the lower values of rate constants of gravity drainage and disproportion. There were significant differences （P 〈 0.05） in the dilatational modulus in the surface rheology measurements, which were higher at the interface with WPI, implying greater resistance of the film formed to collapse and disproportion. In conclusion, WPI formed better and more stable foams than the SPI.

关键词： Soy protein isolates (SPI) whey protein isolates (WPI) disproportion gravitational drainage.

Biodegradability of bioplastics in different aquatic environments:A systematic review

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Journal of Environmental Sciences 2024年第8期142卷 169-181页

作者： maria cristina Lavagnolo Valentina Poli Anna maria Zampini Valentina Grossule Department of Civil Environmental and Architectural Engineering-Laboratory of Environmental EngineeringUniversity of PadovaLungargine Rovetta 8Padova 35100Italy

Bioplastics were first introduced as environmentally friendly materials,with properties similar to those of conventional plastics.A bioplastic is defined as biodegradable if it can be decomposed into carbon dioxide under aerobic degradation,or methane and CO_(2)under anaerobic conditions,inorganic compounds,and new cellular biomass,by the action of naturally occurring *** definition however does not provide any information on the environmental conditions,timescale and extent at which decomposition processes should *** regard to the aquatic environment,recognized standards have been established to assess the ability of plastics to undergo biodegradation;however,these standards fail to provide clear targets to be met to allow labelling of a bioplastic as ***,these standards grant the user an extensive leeway in the choice of process *** these reasons,the comparison of results deriving from different studies is *** authors analysed and discussed the degree of biodegradability of a series of biodegradable bioplastics in aquatic environments(both fresh and salt water)using the results obtained in the laboratory and from on-site testing in the context of different research *** Oxygen Demand(BOD),CO_(2)evolution,surface erosion and weight loss were the main parameters used by researchers to describe the percentage of *** results showed a large variability both in weight loss and BOD,even when evaluating the same type of *** confirms the need for a reference range of values to be established with regard to parameters applied in defining the biodegradability of bioplastics.

关键词： Biodegradation Bioplastic Plastic Natural environment Plastic waste

Nonasthmatic eosinophilic bronchitis in an ulcerative colitis patient-a putative adverse reaction to mesalazine:A case report and review of literature

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World Journal of Clinical Cases 2020年第18期8卷 4162-4168页

作者： Andrei Tudor Cernomaz Gabriela Bordeianu cristina Terinte cristina maria Gavrilescu Department of Internal Medicine Grigore T.Popa University of Medicine and PharmacyIasi 700115Romania Department of Biochemistry Grigore T.Popa University of Medicine and PharmacyIasi 700115Romania Department of Pathology Regional Oncology InstituteIasi 700483Romania

BACKGROUND Lung and airway involvement in inflammatory bowel disease are increasingly frequently reported either as an extraintestinal manifestation or as an adverse effect of *** SUMMARY We report a case of a patient with ulcerative colitis controlled under mesalazine treatment who presented with chronic cough and *** computed tomography and bronchoscopy findings supported tracheal involvement in ulcerative colitis;pathology examination demonstrated an unusual eosinophilrich inflammatory pattern,and together with clinical data,a nonasthmatic eosinophilic bronchitis diagnosis was *** recovery was observed within days of mesalazine *** Mesalazine-induced eosinophilic respiratory disorders have been previously reported,generally involving the lung *** the best of our knowledge,this is the first report of mesalamine-induced eosinophilic involvement in the upper airway.

关键词： Mesalamine Ulcerative colitis Hemoptysis Bronchitis Drug-related side effects Case report

Evolutionary consequences of deception： Complexity and informational content of colony signature are favored by social parasitism

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Current Zoology 2014年第1期60卷 137-148页

作者： maria cristina LORENZI Laura AZZANI Anne-Genevieve BAGNRRES Department of Life Sciences and Systems Biology University of Turin via Accademia Albertina 13 10123 Torino Italy I.R.B.I. - UMR CNRS 7261 - Universit6 de Tours Facult6 des Sciences Parc Grandmont 37200 Tours France

Nestmate recognition codes show remarkable chemical complexity, involving multiple biochemical pathways. This complexity provides the opportunity to evaluate the ecological and social conditions that favor the evolution of complex signaling. We investigated how the chemical signatures of three populations of the social paper wasp Polistes biglumis differed in terms of concentration of hydrocarbons, proportions of branched hydrocarbons and overall variation. We tested whether the variation in chemical signatures among populations could be explained by the prevalence of social parasites or whether this was just an effect of local abiotic conditions which influenced the composition of the hydrocarbon cuticular layer. We studied the chemical signa- ture in three populations in which obligate social parasites differed in the selection pressures they imposed on host populations. Within each population, we restricted our analyses to non-parasitized hosts, to avoid potential short-term effects of parasite pres- ence on the host chemical signatures. We found that host colonies in parasitized populations had more diverse profiles than the parasite-free population. Moreover, the overall concentration of hydrocarbons and the relative proportion of branched hydrocar- bons were larger in the parasitized populations, relative to the non-parasitized one. This is to our knowledge the first evidence in favour of the hypothesis that different traits in the host chemical signatures as a whole undergo evolutionary changes resulting from directional or balancing selection imposed by social parasites. We conclude that obligate social parasites act as ＇engines of diversity＇ on host chemical signatures and operate in favor of a geographic mosaic of diverging communication codes

关键词： Polistes Brood parasitism Cipher Nestmate recognition Hydrocarbons Geographic mosaic Crozier's paradox

Acoustic Scattering Cross Sections of Smart Obstacles: A Case Study

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Communications in Computational Physics 2011年第8期10卷 672-694页

作者： Lorella Fatone maria cristina Recchioni Francesco Zirilli Dipartimento di Matematica e Informatica Universitadi CamerinoVia Madonna delle Carceri 962032 Camerino(MC)Italy Dipartimento di Scienze Sociali"D.Serrani" Universit`a Politecnica delle MarchePiazza Martelli 860121 AnconaItaly CERI-Centro di Ricerca"Previsione Prevenzione e Controllo dei Rischi Geologici" Universit`a di Roma"La Sapienza"Piazza Umberto Pilozzi 900038 Valmontone(RM)Italy

Acoustic scattering cross sections of smart furtive obstacles are studied and discussed.A smart furtive obstacle is an obstacle that,when hit by an incoming field,avoids detection through the use of a pressure current acting on its boundary.A highly parallelizable algorithm for computing the acoustic scattering cross section of smart obstacles is *** a case study,this algorithm is applied to the(acoustic)scattering cross section of a"smart"(furtive)simplified version of the NASA space shuttle when hit by incoming time-harmonic plane waves,the wavelengths of which are small compared to the characteristic dimensions of the *** solution to this numerically challenging scattering problem requires the solution of systems of linear equations with many unknowns and *** to the sparsity of these systems of equations,they can be stored and solved using affordable computing resources.A cross section analysis of the simplified NASA space shuttle highlights three findings:i)the smart furtive obstacle reduces the magnitude of its cross section compared to the cross section of a corresponding"passive"obstacle;ii)several wave propagation directions fail to satisfactorily respond to the smart strategy of the obstacle;iii)satisfactory furtive effects along all directions may only be obtained by using a pressure current of considerable *** experiments and virtual reality applications can be found at the website:http://***/ceri/zirilli/w7.

关键词： Acoustic obstacle scattering smart obstacles acoustic cross section open loop control operator expansion method wavelet expansion

Effect of asphalt thin beams mixed with three nominal maximum aggregate sizes in the bending beam rheometer on the prediction of thermal properties of bituminous material

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Frontiers of Structural and Civil Engineering 2017年第1期11卷 1-7页

作者： Chun-Hsing HO maria Francisca Martinez GONZALEZ cristina Pilar Martin LINARES Department of Civil Engineering Construction Management and Environmental Engineering Northern Arizona UniversityFlagstaff Arizona 86001 USA

The objective of this research is to evaluate an impact of asphalt mixture beams with varying sizes of aggregate in the Bending Beam Rheometer （BBR） for testing/predicting thermal cracking properties of asphalt pavements. The BBR test has following benefits： the equipment is cheaper, it uses smaller specimens, faster conditioning, easier availability for quality control, easier to manage, etc. However some concerns have been raised： some consider that the size of the aggregate may affect the test＇s results; the other concern is that such small beams cannot represent the whole properties of the asphalt pavement. To address these criticisms, imaging techniques, statistical analysis, and viscoelastic modeling are used. Asphalt thin beams prepared with three different nominal maximum aggregate size （NMAS）（12.5mm, 9.5 mm, and 4.75 mm） were tested at three different temperatures （-18℃, -24℃, and -30℃）. Based on results from statistical analyses and viscoelasticity, the ratio of asphalt binders and voids and stiffness differences among the three NMAS specimens are not significant, meaning that the impact of asphalt thin beams prepared with the three NMAS on the prediction of thermal cracking is minimal and can be neglected.

关键词： bending beam rheometer thin beams thermal cracking

Electrochemical Study and Electrodeposition of Copper（I） in Ionic Liquid-reline

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Chemical Research in Chinese Universities 2013年第5期29卷 991-997页

作者： POPESCU Ana-maria COJOCARU Anca DONATH cristina CONSTANTIN Virgil Laboratory of Molten Salts "Hie Murgulescu" Institute of Physical Chemistry of Romanian Academy Bucharest 060021 Romania Department of Applied Physical Chemistry and Electrochemistry University Politehnica of Bucharest Bucharest 010737 Romania

The authors made the electrochemical studies on the electrode processes during copper electrodeposition with ionic liquids-reline as an electrolytic medium. Reline is a commercial name for a eutectic mixture of choline chloride and urea（1：2, molar ratio）. This new proposed method of copper deposition is an ecological one because the ionic liquids are recyclable, non-volatile and non-toxic. Cyclic voltammetry investigations were conducted at 343 and 353 K in choline chloride-urea（Reline） deep eutectic solvent with single salt CuCl（generally in 0.05--0.38 mol/L concentration range）. Electrochemical impedance spectroscopy investigations were conducted in choline chloride- urea ionic liquid with CuCI（0.05 mol/L）. We investigated both cathodic and anodic processes of Cu＋ ions at different sweep rates in this new electrolytic system based on choline chloride. We have proposed by this an alternative to the classical copper electrodeposition. Coefficient of diffusion, Do, for the system Reline-CuCl is presented and the value of D0 is 1.22× 10^-8 cm2/s.

关键词： Ionic liquid Reline Electrodeposition Cu(I) Coefficient of diffusion

Methane oxidation and attenuation of sulphur compounds in landfill top cover systems: Lab-scale tests

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Journal of Environmental Sciences 2018年第3期30卷 317-326页

作者： Roberto Raga Alberto Pivato maria cristina Lavagnolo Laura Megido Raffaello Cossu DII-Department of Industrial Engineering University of Padova Department of Chemical and Environmental Engineering Polytechnic School of Engineering Gijón Campus University of Oviedo

In this study,a top cover system is investigated as a control for emissions during the aftercare of new landfills and for old landfills where biogas energy production might not be *** materials were studied as landfill cover system in lab-scale columns：mechanical–biological pretreated municipal solid waste（MBP）;mechanical–biological pretreated biowaste（PB）;fine（PBSf）and coarse（PBSc）mechanical–biological pretreated mixtures of biowaste and sewage sludge,and natural soil（NS）.The effectiveness of these materials in removing methane and sulphur compounds from a gas stream was tested,even coupled with activated carbon *** of CO2,CH4,O2,N2,H2S and mercaptans were analysed at different depths along the *** degradation was assessed using mass balance and the results were expressed in terms of methane oxidation rate（MOR）.The highest maximum and mean MOR were observed for MBP（17.2 g CH4/m^2/hr and 10.3 g CH4/m^2/hr,respectively）.Similar values were obtained with PB and *** lowest values of MOR were obtained for NS（6.7 g CH4/m^2/hr）and PBSf（3.6 g CH4/m^2/hr）,which may be due to their low organic content and void index,*** membranes with high load capacity did not seem to have an influence on the methane oxidation process：MBP coupled with 220 g/m^2and 360 g/m^2membranes gave maximum MOR of 16.5 g CH4/m^2/hr and 17.4 g CH4/m^2/hr,*** carbon membranes proved to be very effective on H2S ***,carbonyl sulphide,ethyl mercaptan and isopropyl mercaptan seemed to be easily absorbed by the filling materials.

关键词： Emission reduction Greenhouse gas emissionLandfill Methane oxidation H2S Soil cover