Author
Gerardo Daniel López
Other affiliations: National Scientific and Technical Research Council
Bio: Gerardo Daniel López is an academic researcher from National Technological University. The author has contributed to research in topics: Humanism & Factorial experiment. The author has an hindex of 8, co-authored 21 publications receiving 480 citations. Previous affiliations of Gerardo Daniel López include National Scientific and Technical Research Council.
Papers
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TL;DR: In this paper, the authors quantified energy consumption for size reduction of hardwoods and agricultural wastes as a function of final particle size and ratio of comminution, and found that energy input for comminutions, in a multiple feedstock process plant, can be kept below 30 kWh per tonne of wastes, provided final particle sizes is held in the range 3-6 mm.
280 citations
TL;DR: In this paper, results on As(V) removal in the presence of oxygen using the zerovalent iron technology with commercial iron nanoparticles (NanoFe ® ) are presented, showing the effect of nanoFe ® mass, UV light and addition of humic acids.
102 citations
TL;DR: A short exposure to sublethal concentrations of AgNPs is enough to generate deleterious effects on fish, including DNA damage, as evidenced by the DNA damage in fish erythrocytes at higher concentrations.
74 citations
TL;DR: Analysis of antioxidant and oxidative damage responses of anterior, middle and posterior region of L. acuta and bacteria communities after nC60 or nAg exposure during 24 h showed a prevalence of Vibrio genera in the communities.
29 citations
TL;DR: Overall the results indicated toxicological effects of AgNP on bacteria communities living at the zebrafish mucus surface, and no evidence of toxicity in terms of oxidative stress was found.
Abstract: The antimicrobial activity of silver nanoparticles (AgNP) makes them useful in a wide range of products although their environmental impact is still uncertain. The main goal of this study was to evaluate short-term effects induced by AgNP on gills oxidative status and bacterial communities living at the skin mucus of zebrafish. Both the number of bacteria colony forming units and bacteria growth obtained from skin mucus were lower in all concentrations tested (25, 50 and 100 µg nAg/L). Besides, AgNP exposure caused a significant decrease in bacteria growth in zebrafish exposed to 100 µg nAg/L. AgNP accumulated in zebrafish gills at both highest concentrations tested, but this accumulation did not appear to result in oxidative stress. Overall the results indicated toxicological effects of AgNP on bacteria communities living at the zebrafish mucus surface. Although silver accumulation was verified in gills, no evidence of toxicity in terms of oxidative stress was found.
24 citations
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TL;DR: Simultaneous saccharification and fermentation effectively removes glucose, which is an inhibitor to cellulase activity, thus increasing the yield and rate of cellulose hydrolysis, thereby increasing the cost of ethanol production from lignocellulosic materials.
5,860 citations
TL;DR: A review of various pretreatment process methods and the recent literature that has been developed can be found in this paper, where the goal of pretreatment is to make the cellulose accessible to hydrolysis for conversion to fuels.
Abstract: Biofuels produced from various lignocellulosic materials, such as wood, agricultural, or forest residues, have the potential to be a valuable substitute for, or complement to, gasoline. Many physicochemical structural and compositional factors hinder the hydrolysis of cellulose present in biomass to sugars and other organic compounds that can later be converted to fuels. The goal of pretreatment is to make the cellulose accessible to hydrolysis for conversion to fuels. Various pretreatment techniques change the physical and chemical structure of the lignocellulosic biomass and improve hydrolysis rates. During the past few years a large number of pretreatment methods have been developed, including alkali treatment, ammonia explosion, and others. Many methods have been shown to result in high sugar yields, above 90% of the theoretical yield for lignocellulosic biomasses such as woods, grasses, corn, and so on. In this review, we discuss the various pretreatment process methods and the recent literature that...
3,450 citations
TL;DR: A survey of biomass pret treatment technologies with emphasis on concepts, mechanism of action and practicability, and the potential for industrial applications of different pretreatment technologies are the highlights of this paper.
1,618 citations
TL;DR: In this article, a review of available technologies for bioethanol production from agricultural wastes is discussed, which can increase concentrations of fermentable sugars after enzymatic saccharification, thereby improving the efficiency of the whole process.
1,432 citations
TL;DR: The main problem with bioethanol production is the availability of raw materials for the production as mentioned in this paper, which can highly affect the production costs of the bio-ethanol, as the price of the raw materials is highly volatile.
1,265 citations