The international sanctions are imposed against Russia following Russia's annexation of Crimea and the Russian military intervention in Ukraine. This paper aims are at analyzing the impact of sanctions on Russian economy and on energy security of European Union (EU) countries. The focus is energy trade between the EU and Russia. Energy security is always one of the most important problems for the EU.
This paper described isolation and identification of the bioflocculant producing bacteria from soil samples of Tay Nguyen region, Vietnam. A total of 117 bacteria were isolated, among of which 26 isolates showed flocculating activity more than 50%. In addition, the influence of carbon and nitrogen sources, as well as cultural conditions such as temperature, pH and incubation time on flocculating activity of the 3 selected flocculant producing isolates were investigated.
This paper determines the perception of senior high youth about sexuality, for which an instrument containing a demographic profile and socio sexual behavior through items in a liker scale was applied.
Through the use of the structures of greenhouses which used to grow vegetables, in addition to the design of simple models of the structures with local materials to cultivate some fruit crops are very important in terms of economic consideration, which can be exported in large quantities to foreign markets such as navel orange and some pygmy mango varieties. The study was carried out at the Bossaily Protected Agriculture unit in Egypt to measure the performance, efficiency of production and the revenue during the cultivation period 2007- 2013.
This paper investigates the application of the generalized predictive control (GPC), in order to control the speed of the induction motor. This application is based on four main ideas : reproducing decision basic mechanisms of human behaviour; the creation of an anticipatory effect by operation of the path to follow in the future; defining a numerical prediction model; minimization of a quadratic criterion with finite horizon and the principle of receding horizon.
The evaluation of the antibacterial activity using five bacterial strains (Klebsiella, Shigela, Salmonella, Escherichia coli and Staphylococcus aureus) showed that the most active leaf extract was that of Odontonema strictum (Acanthaceae) compared to that of Solanum torvum, Symphytum officinale L. and Aphelandra squarrosa. The inhibition diameters were measured and no resistance was observed at the concentration of 100 g/ml across all bacterial strains. The Activity Index (AI) values of Odontonema strictum (OSM) were determined using chloramphenicol as a positive standard antibiotic.
The presence of large quantities of toxic metals such as mercury, lead, cadmium, zinc or others, poses serious health risks to humans, and this threat puts the scientific community under pressure to develop new methods to detect and eliminate toxic contaminants from wastewaters in efficient and economically viable ways. Industrial and agricultural effluents are a major cause of heavy-metal contamination, thus the removal and recovery of heavy metals from effluent streams is essential to the protection of the environment.
ZnO is a wide band-gap (3.37 eV) II–VI compound semiconductor with hexagonal wurtzite structure. Zinc oxide films were deposited by electrode position, containing very low concentrations of sodium citrate and 30% hydrogen peroxide. Ammonium hydroxide is added to control the reaction. The structural analysis were initially studied with X-ray diffraction (XRD), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS). The average grain size is measured to be 48nm.
Rice husk is a removal waste from its grain that can be used as an absorber in the distillation process using solar energy (sunlight) to convert seawater into clean water. This process will be supported by carrying out necessary study on the material properties to be used as the absorbent which is made of rice husk briquettes. The chemical composition of rice husk obtained after the process comparing to before the process of distillation using SEM. The study using SEM, there is an increase before and after the process distillation.
The aim of this paper, is to apply a new method called Variation Iteration perturbation method ((VIM)) to porous medium equation. This method is a combination of the new integral “Variation Iteration” and the perturbation method. The nonlinear term can be easily handled by perturbation method. The porous medium equations have importance in engineering and sciences and constitute a good model for many systems in various fields. Some cases of the porous medium equation are solved as examples to illustrate ability and reliability of mixture of Variation Iteration and perturbation method.