The aim of the present work was to study the formation of volatile compounds derived from frozen anchoita. In order to evaluate these modifications, anchoita were submitted to 120 days of frozen storage at –20°C. The anchoita were kept frozen until analysis. The peroxide value and the thiobarbituric acid-reactive substances (TBARS) index of fish muscle were determined. The volatile compounds were separated and tentatively identified by mass spectrometry (HS-SPME-GC-MS). Several alcohols (1-butanol, 2-cis-peten-1-ol, 1-peten-3-ol, 1-hexanol, 2-ethyl-hexanol, 1-octen-3-ol) and aldehydes (butanal, hexanal, heptanal, octanal, nonanal) were identified as potential markers for anchoita until storage.
Sustainability Metrics and Indicators of Environmental Impact: Industrial and Agricultural Life Cycle Assessment covers trending topics on the environmental impact of systems of production, putting emphasis on lifecycle assessment (LCA). This methodology is one of the most important tools of analysis, as mathematical models are applied that will quantify the systematic inputs and outputs of the processes in order to evaluate the sustainability of industrial processes and products. In this sense, LCA is mainly a tool to support environmental decision-making that analyzes the environmental impacts of products and technologies from a lifecycle perspective. The emergence of ever-larger global issues, such as the energy dilemma, the changing climate and the scarcity of natural resources, such as water, has boosted the search for tools capable of ensuring the reliability of the results published by the industries, and has become an important tool in order to achieve sustainability and environmental preservation. Thus, lifecycle assessment (LCA), including carbon footprint valuation is necessary to ensure better internal management. Provides guidance on environmental impacts and the carbon footprint of industrial processes Features guidelines in lifecycle assessment to support a sustainable approach, along with quantifiable data to support proposed solutions Includes a companion website with slides and graphics to quantity environmental impact and other metrics of lifecycle assessment
Despite being known for a long time, microalgae are gaining importance in recent decades because of their high capacity to fixate atmospheric carbon, assisting in the reduction of global warming. Concurrently with carbon fixation, the production of compounds of commercial interest and reuse of industrial and domestic wastewater turned microalgal culture into one of the most commented-on subjects in the scientific community. In this chapter the photosynthetic metabolism of microalgae is described and discussed, with emphasis on carbon sequestration. The chapter covers the basics of growing algae, the most influential factors in CO2 fixation, and quantification methodologies. Practical data on rates of carbon fixation by microalgae are presented, especially those genera of algae with the greatest potential for industrial application: Spirulina, Chlorella, Haematococcus, Dunaliella, and Botryococcus. Finally, aspects of the growing global carbon market and the role microalgal technologies can play are also discussed.
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