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263 results on '"Vilu, Raivo"'

18. Change in the carbon footprint of Iranians’ food consumption from 1961 to 2019: A decomposition analysis of drivers

Author

Bashiri, B., Zehtabvar, M., Gavrilova, O., and Vilu, Raivo

Subjects
carbon footprint, diet change, food consumption, articles, article, Iran
Abstract

Received: December 1st, 2022 ; Accepted: April 1st, 2023 ; Published: April 18th, 2023 ; Correspondence: Bashir.Bashiri@tftak.eu The study investigates the role of three drivers: population, energy intake per capita, and dietary change on the carbon footprint of food consumption in Iran from 1961 to 2019. Iran was chosen for this analysis because the country has experienced a noteworthy population increase in the past century, and the imposed international sanctions have changed the economic welfare of the nation. Logarithmic Mean Division Index, along with data of FAOSTAT Food balance sheets and carbon footprint per item, were utilized to decompose the impacts of the drivers. The results demonstrated that the carbon footprint of food consumption in Iran increased by 1.6 during this period. We also found that population increase, and energy intake per capita were the main drivers of the carbon footprint of food consumption in Iran while diet change contributed negatively.

Published
2023
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23. Effect of enzyme‐assisted hydrolysis on brewer's spent grain protein solubilization – peptide composition and sensory properties

Author

Kriisa, Marie, primary, Taivosalo, Anastassia, additional, Föste, Maike, additional, Kütt, Mary-Liis, additional, Viirma, Maret, additional, Priidik, Reimo, additional, Korzeniowska, Malgorzata, additional, Tian, Ye, additional, Laaksonen, Oskar, additional, Yang, Baoru, additional, and Vilu, Raivo, additional

Published
2022
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47. New derivatives of TOL plasmid pWW0

Author

Sarand, Inga, Mae, Andres, Vilu, Raivo, and Heinaru, Ain

Subjects
Plasmids -- Analysis, Chromosome deletion -- Analysis, Transposons -- Analysis, Biological sciences
Abstract

The influence of insertion or deletion of TOL plasmid genes into chromosomesis studied. An analysis of the isolated Pseudomonas putida segregants, PPW1-1 and PPW161-1, reveals that PPW1-1 grows better on m-toluate rather than on m-xylene. Cryptic transposon Tn4652 is obtained from Tn4651 during a deletion of catabolic genes. It is a class II transposon, formed due to the influence of the transposon-specific transposase and its resolution.

Published
1993

50. Multi-omics approach to study the growth efficiency and amino acid metabolism in Lactococcus lactis at various specific growth rates

Author

Arike Liisa, Adamberg Kaarel, Lahtvee Petri-Jaan, Nahku Ranno, Aller Kadri, and Vilu Raivo

Subjects
Microbiology, QR1-502
Abstract

Abstract Background Lactococcus lactis is recognised as a safe (GRAS) microorganism and has hence gained interest in numerous biotechnological approaches. As it is fastidious for several amino acids, optimization of processes which involve this organism requires a thorough understanding of its metabolic regulations during multisubstrate growth. Results Using glucose limited continuous cultivations, specific growth rate dependent metabolism of L. lactis including utilization of amino acids was studied based on extracellular metabolome, global transcriptome and proteome analysis. A new growth medium was designed with reduced amino acid concentrations to increase precision of measurements of consumption of amino acids. Consumption patterns were calculated for all 20 amino acids and measured carbon balance showed good fit of the data at all growth rates studied. It was observed that metabolism of L. lactis became more efficient with rising specific growth rate in the range 0.10 - 0.60 h-1, indicated by 30% increase in biomass yield based on glucose consumption, 50% increase in efficiency of nitrogen use for biomass synthesis, and 40% reduction in energy spilling. The latter was realized by decrease in the overall product formation and higher efficiency of incorporation of amino acids into biomass. L. lactis global transcriptome and proteome profiles showed good correlation supporting the general idea of transcription level control of bacterial metabolism, but the data indicated that substrate transport systems together with lower part of glycolysis in L. lactis were presumably under allosteric control. Conclusions The current study demonstrates advantages of the usage of strictly controlled continuous cultivation methods combined with multi-omics approach for quantitative understanding of amino acid and energy metabolism of L. lactis which is a valuable new knowledge for development of balanced growth media, gene manipulations for desired product formation etc. Moreover, collected dataset is an excellent input for developing metabolic models.

Published
2011
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