Special transformation processes using fungal spores and immobilized cells

Author(s):  
Christian Larroche ◽  
Jean-Bernard Gros
2013 ◽  
Vol 12 (4) ◽  
pp. 9-18
Author(s):  
Mahesh Arvind

Phenolic compounds are important constituents of petrochemical waste waters arising from transformation processes. Phenol together with substituted halophenols, nitrophenols and alkyl phenols are the main constituents. An Arthrobacter citreus spp. strain MSA - 2005 initially selected for growth at the expense of phenol as the sole source of carbon and energy, was enriched with phenolic    compounds    such    as    4-nitrophenol,    4- chlorophenol and 4-methyl phenol. Metabolization of these compounds upto their maximum levels in the mineral salt medium was studied. The complete metabolization    of 4-nitrophenol    upto    15mM,    4- chlorophenol up to 12mM and 4-methyl phenol upto 6mM against phenol upto 22mM was achieved in 24 hours. The metabolism of these compounds by the isolated strain occurred through the involvement of catechol derivatives as key intermediates which are further hydrolysed to hydroxy quinol which enters the β -keto adipate pathway. Results indicate that the cells contain mono and di- oxygenase enzymes necessary for these conversions. The degradation rates of these phenolic compounds, by agar immobilized cells has also been reported.


2020 ◽  
Vol 2020 (10) ◽  
pp. 19-33
Author(s):  
Nadiia NOVYTSKA ◽  
◽  
Inna KHLIEBNIKOVA ◽  

The market of tobacco products in Ukraine is one of the most dynamic and competitive. It develops under the influence of certain factors that cause structural changes, therefore, the aim of the article is to conduct a comprehensive analysis of transformation processes in the market of tobacco and their alternatives in Ukraine and identify the factors that cause them. The high level of tax burden and the proliferation of alternative products with a potentially lower risk to human health, including heating tobacco products and e-cigarettes, are key factors in the market’s transformation process. Their presence leads to an increase in illicit turnover of tobacco products, which accounts for 6.37% of the market, and the gradual replacement of cigarettes with alternative products, which account for 12.95%. The presence on the market of products that are not taxed or taxed at lower rates is one of the reasons for the reduction of excise duty revenues. According to the results of 2019, the planned indicators of revenues were not met by 23.5%. Other reasons for non-fulfillment of excise duty revenues include: declining dynamics of the tobacco products market; reduction in the number of smokers; reorientation of «cheap whites» cigarette flows from Ukraine to neighboring countries; tax avoidance. Prospects for further research are identified, namely the need to develop measures for state regulation and optimization of excise duty taxation of tobacco products and their alternatives, taking into account the risks to public health and increasing demand of illegal products.


2004 ◽  
Vol 17 (2) ◽  
pp. 132-136 ◽  
Author(s):  
Balázs Erdélyi ◽  
Antal Szabó ◽  
László Birincsik ◽  
Gábor Seres ◽  
János Salát ◽  
...  

Author(s):  
E. Smirnov

At the present stage, the world economy is experiencing a difficult stage of development, which is determined by many factors, in particular, the dynamics of economic growth, the increase in global inequality, and the mixed influence of digital transformation processes. The article analyzed the main trends and risks of modern world economy development, as well as identified key aspects of multilateral regulation and restoration of economic balance on the international scale.


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