Microorganisms are dominant form of life on the Earth. It is necessary to enlarge the knowledge about them for more efficient use in all areas of biotechnology, medicine, ecology. Acidithiobacillus ferrooxidans are acidophilic chemolitoautothropfic bacteria, with capability to oxidize ferrous ions and used in waste water, tail gas treatment and bioleaching technologies. In appropriate condition...

In order to address preserved protein bioactivities and protein sustained-release problems, a method for preparing double-walled microspheres with a core (protein-loaded nanoparticles with a polymer-suspended granule system-formed core) and a second shell (a polymer-formed shell) for controlled drug release and preserved protein bioactivities has been developed using (solid-in-oil phase-in-hydr...

abstract nowadays, measuring water quality is very important for comprehensive management of water resources. suspended sediment is one of the most important water quality factors which greatly affects environment health. however, its measurement needs too much time and money. it was therefore tried in the present study to assess the applicability of modelling relationship between suspended sed...

The water intaking system of a water works usually controlled the rotation rate of water pumps manually according to experiences, with low accuracy rate and poor energy-saving effect in the past. Combining with the system status, this paper brings forward constructing a variable frequency water intaking control system with PLC and inverter as the core, and by means of fuzzy PID control. During ...

The electrical double layer surrounding solid particles suspended in water is assumed to be due to a difference in the concentration of the oppositely charged ions of an electrolyte in the enveloping film (i.e. the film of water which adheres to and moves with the particle in an electrical field) and the opposite film. This difference in concentration is generally ascribed to a preferential ads...

Rapid development and population growth have resulted in an ever-increasing level of water pollution in Malaysia. Therefore, this study was conducted to assess water quality of Selangor River in Malaysia. The data collected under the river water quality monitoring program by the Department of environment from 2005 to 2015 were used for statistical analyses. The local water quality indices were ...