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Chemical Degradation of Indigo Potassium Tetrasulfonate Dye by Advanced Oxidation Processes

Journal of Environmental Protection 2014年第13期5卷 1342-1351页

作者： veronica camargo Elba Ortiz Hugo Solis Carlos M. Cortes-Romero Sandra Loera-Serna Carlos J. Perez Department of Basic Sciences Universidad Autónoma Metropolitana Azcapotzalco Mexico City Mexico Division of Industrial and Systems Engineering Universidad Politecnica del Valle de México Estado de Mexico Mexico

The experimental degradation of a water soluble dye, potassium indigo tetrasulfonate salt, has been studied using stand-alone ozonation and photocatalytic oxidation process. Progress of the dye oxidation was followed by UV-VIS spectrophotometric measurements at controlled operating conditions. The organic content of reaction samples was measured to verify the process efficiency in dye mineralization. According to current results, almost complete color removal was obtained for ozonation within about 1 h reaction time. The reduction of the organic load was almost 80% from its original while initial sulphur content decreased to 32.5%. Dye conversion of 100% was obtained by means of a photocatalytic process using TiO2 as catalyst at 294 nm irradiated UV light. This complete color removal for the catalytic process was observed within 7 min of reaction time. The calculated initial rate of reaction of photocatalysis treatment was 8 times faster than that of ozonolysis. However, the remaining organic load of photocatalysis was almost 88% from its original while the final sulphur content was 27.3%. This contrasting behavior of the performance of the type of oxidation process stressed importance of physicochemical phenomena and intermediates molecules present during dye degradation. An insightful and mechanistic aspect of the dye oxidation was developed by performing quantumchemical calculations.

关键词： Indigo Potassium Tetrasulfonate Advanced Oxidation Processes Chemical Degradation Theoretical Calculations

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Role of dehydroepiandrosterone sulfate as a scavenging antioxidant: the evidence from Caenorhabditis elegans' nervous system under hypoxia

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Neural Regeneration Research 2021年第8期16卷 1537-1538页

作者： Leonardo Hernandez Gabriela camargo Departamento de Fisiología.CUCS-Universidad de Guadalajara GuadalajaraJaliscoMexico Departamento de Ciencias de la Salud.CUALTOSUniversidad de Guadalajara TepatitlanJaliscoMexico

In nature,changes in O_(2) levels occur *** inadequate supply of oxygen often happens in living systems,which induces an imbalance between oxygen entering cells and their oxygen demand to produce *** condition is known as *** hypoxia takes place in multiple physiological processes,it can be a primary cause of cellular injury and death(Nystul and Roth,2004).Consequently,cells and tissues are habitually at risk,and they have developed many strategies to cope with low oxygen levels leading to pathological conditions(Fawcett et al.,2015).These adaptative responses to hypoxia though not entirely understood,seem to be evolutively *** these responses,hypoxia can still have harmful effects.

关键词： hypoxia entirely system

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Proteomic profile of seminal plasma in adolescents and adults with treated and untreated varicocele

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Asian Journal of Andrology 2016年第2期18卷 194-201,J0003页

作者： Mariana camargo Paula Intasqui Ricardo Pimenta Bertolla Department of Surgery Division of Urology Human Reproduction Section Sao Paulo Federal University R. Embau 231 04039-060 Sao Paulo Brazil Sao Paulo Hospital Sao Paulo Brazil.

Varicocele, the most important treatable cause of male infertility, is present in 15% of adult males, 35% of men with primary infertility, and 80% of men with secondary infertility. On the other hand, 80% of these men will not present infertility. Therefore, there is a need to differentiate a varicocele that is exerting a deleterious effect that is treatable from a ＂silent＂ varicocele. Despite the growing evidence of the cellular effects of varicocele, its underlying molecular mechanisms are still eluding. Proteomics has become a promising area to determine the reproductive biology of semen as well as to improve diagnosis of male infertility. This review aims to discuss the state-of-art in seminal plasma proteomics in patients with varicocele to discuss the challenges in undertaking these studies, as well as the future outlook derived from the growing body of evidence on the seminal proteome.

关键词： male infertility proteomics seminal plasma varicocele varicocelectomy

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Quench Dynamics of Neutral Atoms in Out-Equilibrium One-Dimensional Optical Lattices

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Communications in Theoretical Physics 2018年第10期70卷 496-500页

作者： V.Leyton A.Arguelles M.camargo Centro de Investigacidn en Ciencias Basicas Universidad Santiago de Cali Calle 5 No. 62-00 Cali Colombia Centro de Investigaciones en Ciencias Baisicas y Aplicadas Universidad Antonio Narifio Km 18 via Cali-Jamundf 760030 Santiago de Cali Colombia

A quantum simulator is proposed for nucleation and growth dynamics using an out-of equilibrium optical lattice. We calculate the density of neutral atoms in the lattice and we establish the connection with the KolmogorovMehl-Johnson-Avrami model. Here we show that an Avrami equation can describe most of the evolution in time of the population growth in the lattice, coherence between neutral atoms leads a complex growth rate.

关键词： 1D optical lattice Bose-Hubbard model out-equilibrium system nucleation

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Tides and Wind-Driven Circulation in the Tropical and Southern Atlantic Ocean:The BRAZCOAST System

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Atmospheric and Oceanic Science Letters 2014年第5期7卷 476-480页

作者： Ricardo de camargo Joseph HARARI Department of Atmospheric Sciences University of Sao Paulo Sao Paulo Brazil Department of Physical Chemical and Geological Oceanography University of Sao Paulo Sao Paulo Brazil

The Brazilian coast is characterized by different tidal regimes and distinct meteorological influences. The northern part has larger tidal amplitudes and is permanently affected by trade winds and tropical disturbances; the southern portion has smaller tidal amplitudes and is frequently influenced by extratropical cyclone activity. Besides these aspects, many features regarding current structure and behavior are also present, such as the equatorial system of currents, the subtropical gyre and the corresponding western boundary currents, and the Brazil-Malvinas confluence region. Within this context, efforts were made to develop the BRAZCOAST system, capable of describing the processes that determine the oceanic circulation from large to coastal scales. A customized version of the Princeton Ocean Model(POM) was implemented in a basin-scale domain covering the whole of the tropical and southern Atlantic Ocean, with 0.5° spatial resolution, as well as three nested grids with(1/12)° resolution covering the different parts of the Brazilian shelf, in a one-way procedure. POM was modified to include tidal potential generator terms and a partially-clamped boundary condition for tidal elevations. The coarse grid captured large-scale features, while the nested grids detailed local circulations affected by bathymetry and coastal restrictions. An interesting aspect at the coarse grid level was the relevance of the Weddell Sea to the location of the tidal amphidromic systems.

关键词： tides wind-driven circulation tropical Atlan-tic South Atlantic Princeton Ocean Model

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Changes in culm surface temperature with maturity of the bamboo species Guadua angustifolia

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Journal of Forestry Research 2016年第2期27卷 419-425页

作者： Nils Nolke Juan Carlos camargo Garcia Christoph Klein Andrea Polle Chair of Forest Inventory and Remote Sensing Universitat GottingenBusgenweg 537077 GottingenGermany Faculty of Environmental Sciences Technological Universityof PereiraLa JulitaPereiraColombia Department of Forest Botany and Tree Physiology Universiat GottingenBiJsgenweg 237077 GottingenGermany

We used thermal images of bamboo culms of Guadua angustifolia Kunth to analyze the relationship between culm surface temperature and maturity, driven by the hypothesis that young culms may exhibit lower surface temperatures than old ones. The culm surface temperature shows small but constant differences between three age classes of 1, 2, and 3 years. Our findings indicate that surface temperature may be applied as an additional indi- cator to support the determination of maturity of guadua culms besides the visual assessment of the culms.

关键词： Bamboo culms Thermal images Bamboowood quality

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Modeling and simulation of normal and hemiparetic gait

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Frontiers of Mechanical Engineering 2015年第3期10卷 233-241页

作者： Lely A. LUENGAS Esperanza camargo Giovanni SANCHEZ Technological Faculty Universidad Distrital Francisco Jose de CaldasBogota Colombia Engineering Faculty Universidad de San Buenaventura BogotaColombia

Gait is the collective term for the two types of bipedal locomotion, walking and running. This paper is focused on walking. The analysis of human gait is of interest to many different disciplines, including biomecha- nics, human-movement science, rehabilitation and medicine in general. Here we present a new model that is capable of reproducing the properties of walking, normal and pathological. The aim of this paper is to establish the biomechanical principles that underlie human walking by using Lagrange method. The constraint forces of Rayleigh dissipation function, through which to consider the effect on the tissues in the gait, are included. Depending on the value of the factor present in the Rayleigh dissipation function, both normal and pathological gait can be simulated. First of all, we apply it in the normal gait and then in the permanent hemiparetic gait. Anthropometric data of adult person are used by simulation, and it is possible to use anthropometric data for children but is necessary to consider existing table ofanthropometric data. Validation of these models includes simulations of passive dynamic gait that walk on level ground. The dynamic walking approach provides a new perspective of gait analysis, focusing on the kinematics and kinetics of gait. There have been studies and simulations to show normal human gait, but few of them have focused on abnormal, especially hemiparetie gait. Quantitative comparisons of the model predictions with gait measurements show that the model can reproduce the significant characteristics of normal gait.

关键词： bipedal gait biomechanics dynamic walking,gait model human gait hemiparetic human gait

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Morphological traits explain the individual position within resource-consumer networks of a Neotropical marsupial

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Current Zoology 2024年第4期70卷 453-464页

作者： Nicholas F.de camargo Hernani F.M.de Oliveira Juliana F.Ribeiro Amabilio J.A.de camargo Emerson M.Vieira Laboratorio de Ecologia de Vertebrados Departamento de EcologiaInstituto de Ciencias BiologicasUniversidade de BrasiliaCP 04457BrasiliaDF70910-900Brazil Departamento de Zoologia Setor de Ciencias BiologicasUniversidade Federal do ParanaAvenida Coronel Francisco Heraclito dos Santos100CuritibaPR81531980Brazil Embrapa Cerrados Rodovia BR020km 18CP 08223PlanaltinaDE73310-970Brazil

Knowledge regarding the influence of individual traits on interaction patterns in nature can help understand the topological role of individuals within a network of intrapopulation *** tested hypotheses on the relationships between individuals'positions within networks(specialization and centrality)of 4 populations of the mouse opossum Gracilinanus agilis and their traits(i.e.,body length,body condition,tail length relative to body length,sex,reproductive condition,and botfly parasitism)and also seasonal effects in the Brazilian *** with lower body length,better body condition,and relatively shorter tail were more specialized(i.e.,less connected within the network).Individuals were also more specialized and less connected during the warm-wet *** relationship between individuals'position in the network and body traits,however,was independent of *** propose that specialization may arise not only as a result of preferred feed-ing strategies by more capable individuals(i.e.,those with better body condition and potentially prone to defend and access high-quality food resources)but alsobecause of morphological ***/younger individuals(consequently with less experience in foraging)and short-tailed individuals(less skilled to explore the vertical strata of the vegetation)would feed only on a subset of the available food resources and consequently become more ***,individuals are more specialized during the warm-wet season because of high competition(population-dense period)and higher ecological opportunities(resource-rich period).Therefore,our study reveals the relevance of individual traits inshaping interactionpatternsandspecialization inpopulations.

关键词： bodytraits centrality Cerrado Gracilinanus agilis seasonality specialization.

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Evolution of the 3.65-2.58 Ga Mairi Gneiss Complex,Brazil:Implications for growth of the continental crust in the São Francisco Craton

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Geoscience Frontiers 2022年第5期13卷 110-128页

作者： Igor de camargo Moreira Elson Paiva Oliveira Daniel Francisco Martins de Sousa Institute of Geosciences University of Campinas(UNICAMP)CampinasSPBrazil

The composition and formation of the Earth’s primitive continental crust and mantle differentiation are key issues to understand and reconstruct the geodynamic terrestrial evolution,especially during the ***,the scarcity of exposure to these rocks,the complexity of lithological relationships,and the high degree of superimposed deformation,especially with long-lived magmatism,make it difficult to study ancient *** this complexity,exposures of the Archean Mairi Gneiss Complex basement unit in the São Francisco Craton offer important information about the evolution of South America’s primitive ***,here we present field relationships,LA-ICP-SFMS zircon U-Pb ages,and LA-ICP-MCMS Lu-Hf isotope data for the recently identified Eoarchean to Neoarchean gneisses of the Mairi *** Complex is composed of massive and banded gneisses with mafic members ranging from dioritic to tonalitic,and felsic members ranging from TTG(Tonalite-Trondhjemite-Granodiorite)to granitic *** new data point to several magmatic episodes in the formation of the Mairi Gneiss Complex:Eoarchean(ca.3.65–3.60 Ga),early Paleoarchean(ca.3.55–3.52 Ga),middle-late Paleoarchean(ca.3.49–3.33 Ga)and Neoarchean(ca.2.74–2.58 Ga),with no records of Mesoarchean ***-Hf data unveiled a progressive evolution of mantle differentiation and crustal recycling over *** the Eoarchean,rocks are probably formed by the interaction between the pre-existing crust and juvenile contribution from chondritic to weakly depleted mantle sources,whereas mantle depletion played a role in the Paleoarchean,followed by greater differentiation of the crust with thickening and recycling in the middle–late Paleoarchean.A different stage of crustal growth and recycling dominated the Neoarchean,probably owing to the thickening of the continental crust by collision,continental arc growth,and mantle differentiation.

关键词： São Francisco Craton Mairi Gneiss Complex Primitive continental crust Zircon U-Pb dating Lu-Hf isotope geochemistry

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Experimental and Data Fitting Guidelines for the Determination of Polymer Crystallization Kinetics

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Chinese Journal of Polymer Science 2022年第6期40卷 658-691页

作者： Ricardo Arpad Perez-camargo Guo-Ming Liu Du-Jin Wang Alejandro J.Muller Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Engineering PlasticsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China POLYMAT and Department of Polymers and Advanced Materials:Physics Chemistry and TechnologyFaculty of ChemistryUniversity of the Basque Country UPV/EHUDonostia-San Sebastián 20018Spain IKERBASQUE Basque Foundation for ScienceBilbao 48013Spain

The crystallization kinetics of semicrystalline polymers is often studied with isothermal experiments and analyzed by fitting the data with analytical expressions of the Avrami and Lauritzen and Hoffman(LH)*** correctly carry out the analysis,precautions in both experiments and data fitting should be ***,we systematically discussed the factors that influence the validity of the crystallization kinetics *** basic concepts and fundamentals of the Avrami and LH theories were introduced at ***,experimental protocols were discussed in *** clarify the impact of various experimental parameters,selected common polymers,i.e.,polypropylene and polylactide,were studied using various experimental techniques(i.e.,differential scanning calorimetry and polarized light optical microscopy).Common mistakes were simulated under conditions when non-ideal experimental parameters were ***,from a practical point of view,we show how to fit the experimental data to the Avrami and the LH theories,using an Origin■App developed by us.

关键词： Isothermal crystallization Avrami equation Lauritzen and Hoffman theory Thermal analysis Step-crystallization

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