Sophorolipids (SLs) production by the yeast Candida bombicola was studied in batch shake flasks using synthetic dairy wastewaters (SDWW) with or without any added external carbon and nitrogen sources. A maximum SLs production of 38.76 g/l was observed with the SDWW supplemented with low cost substrate of sugarcane molasses at 50 g/l and soybean oil at 50 g/l. When the SDWW was supplemented with...

We conduct an event analysis on OPEC quota announcements to determine their impact on the stock returns in the oil industry. We find that announcements to reduce the quota are followed by positive excess returns over pre-announcement levels, announcements of no action are met with negative excess returns and announcements to increase the quota have no significant impact on stock market returns....

This article aims to substantiate the factors by which oil industry influences sustainable development of OPEC++-participating countries under conditions uncertainty. The impact price parameters world market and tools its regulation on sustainability was assessed using panel regression analysis. level analyzed integrated estimation method, focusing crude functioning features. Undoubtedly, we ca...

This study seeks to explain why crude oil prices fluctuate, the main cause being the quota regime, which characterises the OPEC agreements. Given that the Saudi oil supply is inelastic in the short term, a shock in the oil market is accommodated by an immediate price change. In contrast, a dominant firm behaviour in the long term causes an output change, which is accompanied by a smaller price ...

The relation between the climate regulation and the multilateral trade regime is a rising issue in the field of international governance. This article presents the options available to OPEC economies related to this. It analyses the option of introducing a carbon tax or border adjustment measures in the core of the WTO regime. It demonstrates that this option is not sustainable for both institu...

This paper considers the relationship between the extraction rates and remaining reserves of a nonrenewable resource. Under general conditions the derived extraction rule is firstly linear, and secondly exhibits a slope term common to all extractors regardless of pricing behaviour and costs whilst differences are captured by the intercept. Data from the world oil industry supports the hypothesi...