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Article
Effect of autohydrolysis on hemicellulose extraction and pyrolytic hydrogen production from Eucalyptus urograndis
Ensuring environmental and social-economic sustainability in the use of materials from lignocellulosic biomass requires their fractionation and valorization of their main components. In this work, we used Eucalyp...
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Article
Characterization and use of southern cattail for biorefining-based production of furfural
In this work, we assessed the potential of southern cattail (Typha domingensis) as a lignocellulosic material for producing furfural in some regions. Also, we modeled and optimized the process involving autohydro...
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Article
Integral valorization of tagasaste (Chamaecytisus proliferus) under thermochemical processes
The generation of compounds derived from lignocellulosic biomass fractionation has a boost in recent years. An interesting plant could be tagasaste (Chamaecytisus proliferus) due to its high biomass production an...
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Article
Effects of fetal respiratory movements on the short-term fractal properties of heart rate variability
We evaluated the effect of fetal respiratory movements (RM) on the heart rate (HR) fractal dynamics.Abdominal ECG recordings were collected from low-middle-risk pregnant woman at rest. Mean gestational age was...
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Article
Applying fractal analysis to short sets of heart rate variability data
The aim of this study was to explore the interchangeability of fractal scaling exponents derived from short- and long-term recordings of real and synthetic data. We compared the α1 exponents as obtained by detren...
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Article
The biological properties of lysine-derived surfactants
We examine the effects of aquatic toxicity on Daphnia magna, the antimicrobial activity of new anionic lysine-derivative surfactants, and the influence of different-sized counterions associated with the surfactan...
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Article
Microbial aspects of linear alkylbenzene sulfonate degradation in coastal water
Viable and total bacteria were determined during linear alkylbenzene sulfonate (LAS) degradation in coastal seawater. Viable bacteria were determined by plate counts on marine agar media, while total bacteria ...
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Article
Evaluation of Acute Toxicity and Genotoxicity of Liquid Products from Pyrolysis of Eucalyptus grandis Wood
Slow pyrolysis of Eucalyptus grandis wood was performed in an oven laboratory, and smoke was trapped and condensed to yield liquid products. Polycyclic aromatic hydrocarbons (PAHs) and phenolic fractions were i...
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Article
Effect of homolog distribution on the toxicity of alcohol ethoxylates
Previous work established a high correlation between the potential environmental toxicity of oxyethylenated nonionic surfactants and the average degree of ethoxylation. For this reason, it was considered of in...
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Article
Deactivation of a fixed bed Cr2O3/Al2O3 catalyst during butene-1 dehydrogenation, II. Model predictions
A model has been used to predict the temperature, butene and carbon concentration profiles in a fixed bed reactor during butene-1 dehydrogenation when Cr2O3/Al2O3 is used as a catalyst. Furthermore, the model giv...
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Article
Deactivation of a fixed bed Cr2O3/Al2O3 catalyst during butene-1 dehydrogenation, I. Simulated and experimental results
A model has been tested to predict the carbon concentration profiles in a fixed bed reactor during butene-1-dehydrogenation on a Cr2O3/Al2O3 catalyst. Simulated and experimental results show an important influenc...
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Article
Monomer-micelle equilibrium in the diffusion of surfactants in binary systems through collagen films
Three different binary systems (two anionic/nonionic and one anionic/amphoteric) were selected to study the behavior of these mixtures in their diffusion through a collagen film and the formation of micelle ag...
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Chapter
Biological Amphiphile Systems, and Relevance of Surfactants in the Biomedical Arena, Health, and the Human Body
Electron micrographs, dynamic light-scattering, and osmotic measurements have been performed on monolayered vesicles obtained from two bolaform amphiphiles of recent synthesis. Monolayered vesicles of bipolar ...
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Chapter
Interaction of Sodium Dodecyl Sulphate and Dimethyl-Dodecyl-Amine Oxide in Aqueous Solutions
The study was undertaken of some physico-chemical properties of an anionic surfactant, sodium dodecyl sulphate, and an amine oxide, dimethyl-dodecyl-amine oxide, as well as their mixed solutions.
