Collaborative elicitation to select a sustainable biogas desulfurization technique for landfills

[EN] The 2015 Paris Agreement within the United Nations Framework Convention on Climate Change establishes three key ways for the reduction of the emissions of Greenhouse Effect Gases: mitigation, adaptation and resilience of ecosystems. In this context, one of the major goals for methane recovery from waste is the process of obtaining biogas from biomass or waste, a form of fuel with zero impact on the carbon footprint of the planet. All possible uses of biogas depend mainly on the degree of purification obtained. The removal of hydrogen sulfide (H2S) is the main weakness in using biogas in industrial applications. If the use of biogas is intended for engines, turbines or to enrich the biogas to obtain natural gas, lowering the levels of H2S will be necessary, in order to avoid corrosion in gas lines and in engines. Biogas desulfurization can be achieved through different techniques: physical, chemical, biological or hybrid procedures. Selecting the most sustainable technique to clean biogas entails a complex problem, which involves the analysis of these desulfurization treatments under different criteria. In this paper, we present a novel collaborative elicitation to select the consensus procedure for the reduction of the concentration of H2S in biogases from landfills. The elicitation technique is based on fuzzy set theory and VIKOR method in order to handle intangible data and to avoid potential bias by the panelists. The proposed hybrid method guarantees traceability and transparency to achieve consensus among the panel of experts during the decision making procedure.Curiel-Esparza, J.; Reyes-Medina, M.; Martín Utrillas, MG.; Martínez-García, MP.; Canto-Perello, J. (2019). Collaborative elicitation to select a sustainable biogas desulfurization technique for landfills. Journal of Cleaner Production. 212:1334-1344. doi:10.1016/j.jclepro.2018.12.095S1334134421

Interaction of Nanoparticles with Blood Components and Associated Pathophysiological Effects

Nanotechnology currently plays a pivotal role in several fields and has enabled substantial advances in a relatively short time. In biomedicine, nanomaterials can be potentially employed as a tool for early diagnosis and an innovative mode of drug delivery. Novel nanomaterials are currently widely manipulated without a full assessment of their potential health risks. It is commonly thought that nanomaterials’ first contact with the organism is through the different components of the immune system. However, if the entry route is intravenous, the first contact will be with the blood’s components (erythrocytes, platelets, white cells, plasma and complement proteins). The presence of nanomaterials within a dynamic environment such as the bloodstream can produce potential harmful effects following interaction with several blood components. The design of innovative strategies leading to the development of more hemocompatible nanomaterials is also necessary

Potential Harm of Maltodextrin‐Coated Cadmium Sulfide Quantum Dots in Embryos and Fetuses

Over the past years, there has been significant interest in the study of nanoparticles for clinical applications, particularly quantum dots (QDs). However, previous studies have also shown that QDs can reach the embryo through the placenta, a natural barrier for a large variety of organic substances with diverse molecular structures, and may cause developmental deformities. Due to its essential role in a toxicological profile and its relevance to human safety, knowledge regarding embryotoxicity is of great importance. Previous studies by this research group have shown that CdS‐maltodextrin QDs are biocompatible and nontoxic to cells and animals; however, QDs are able to induce embryotoxic effects. Therefore, as an effort to further address the issue, we studied the effects of CdS‐maltodextrin QDs on embryo and fetus development using an embryotoxicity and teratogenicity assay on chicken embryos. Chicken embryos exposed to CdS‐maltodextrin QDs (0.001, 0.01, 0.1 and 1 µg/kg) in ovo for 72 h showed growth and developmental alterations during the early stage and at the end of their development in a dose‐dependent manner. Decreased development was observed during early stages (Stages 9/10 on the Hamburger‐Hamilton scale) when compared with untreated eggs (Stage 13). Chicken embryos exposed to lower CdS‐maltodextrin QDs doses (0.01, 0.1 and 1 ng/kg) and incubated in ovo for 21 h also showed growth and development alterations during the early stages and at the end of their development in a dose‐dependent manner. However, reduced development was observed at the end of the development period (21 days), and this was associated with death of the chick. Current studies have also shown that CdS‐dextrin induces embryotoxicity and teratogenicity, affecting mainly the CNS, the neural tube and somites in chicken embryos. The nature of the observed abnormalities suggests that these effects could be directly associated with nanoparticle concentrations affecting somitogenesis. Therefore, according to the results, there is a high probability that the prolonged accumulation of QDs in the maternal organism may be potentially harmful on embryo and fetus development. This study is limited to the analysis of embryotoxic and teratogenic effects induced by CdS‐maltodextrin QDs

El Conflicto trabajo-familia en relación a factores laborales en trabajadores de la salud durante la emergencia sanitaria ocasionada por el COVID-19.

The article presents the job factors that affect the work-family relationship in health workers. The study was carried out during the COVID-19 pandemic in a public hospital in the State of Guanajuato. It is verified through the method of structural equations that there is a positive and significant relationship between the variables "support to colleagues" and "occupational risks" in relation to "job demands". In turn, there is a positive and significant relationship between the variable "demands at work" and the relationship "work-family conflict". Possible strategies that the organization can undertake in relation to seeking better alternatives to improve the quality of life of health workers are also discussed.El artículo presenta los factores laborales que afectan la relación trabajo-familia en los trabajadores de la salud. El estudio se realizó durante la pandemia del COVID-19 en un hospital público del Estado de Guanajuato. Se comprueba a través del método de ecuaciones estructurales que existe una relación positiva y significativa entre las variables “apoyo a compañeros” y “riesgos ocupacionales” en relación a las “demandas de trabajo”. A su vez existe una relación positiva y significativa entre la variable “demandas en el trabajo” y la relación “conflicto trabajo-familia”. Se discuten también las posibles estrategias que puede emprender la organización en relación a buscar mejores alternativas para mejorar la calidad de vida de los trabajadores de la salud

Hybrid method for selection of the optimal process of leachate treatment in waste treatment and valorization plants or landfills

“The final publication is available at Springer via http://dx.doi.org/10.1007/s10098-014-0834-4”Leachate from waste landfill or treatment plants is a very complex and highly contaminated liquid effluent. In its composition, it is found dissolved organic matter, inorganic salts, heavy metals, and other xenobiotic organic compounds, so it can be toxic, carcinogenic, and capable of inducing a potential risk to biota and humans. European law does not allow such leachate to leave the premises without being depolluted. There are many procedures that enable debugging, always combining different techniques. Choosing the best method to use in each case is a complex decision, as it depends on many tangible and intangible factors that must be weighed to achieve a balance between technical, cost, and environmental sustainability. 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自称表現に見られる日中両言語の人称代名詞と親族語彙

千葉大学社会文化科学研究科研究プロジェクト報告書第84集『日中両言語における代名詞及び親族語彙の対照研究-琉球方言との比較研究も含めて』所