Bacterial Cellulose (BC) was used as a carrier for Saccharomyces cerevisiae immobilization. The immobilization method included two steps: adsorption and incubation. In the adsorption step, initial cell concentration in the yeast suspension and immobilization time were optimized by Face Centered Central Composite Design (FCCCD) for maximizing cell immobilization yield. In the incubation step, in...

The objective of this study was to evaluate the concentration of Cu, Zn, Cr and Pb in different species of fish collected in the estuarine and limnic regions of the São Gonçalo channel, located in the Patos-Mirim lagoon complex in the coastal plain of Rio Grande do Sul State (Southern Brazil) during 2013 (autumn, winter and spring) and 2014 (summer). Fish samples were decomposed in a digester b...

Ganoderma lucidum is commonly used in Vietnam and other countries since more than 4000 years ago with excellent beneficial health effects Lingzhi has potential applications as a functional product with polysaccharide, and many other healthy components. This polysaccharide obtained good application in human. Lingzhi becomes a common mushroom in Vietnam, growing almost all year. The fruit of this...

This paper investigates the effect of different cutting parameters (cutting speed, feed rate, and depth of cut) on cutting force components and material removal rate (MRR) in dry and wet hard turning processes. The workpiece material, hardened alloy steel AISI 52100, was machined on a CNC lathe with coated carbide tool under different settings of cutting parameters. Three cutting parameters eac...

In the present investigation, Pseudomonas aeruginosa (NCIM 2074) which can utilize phenol as a sole source of carbon and energy was selected for the degradation of phenol. Experiments were made as a function of carbon source (glucose), inorganic nitrogen (ammonium chloride) and metal ion concentration (zinc ion). In this work, a 23full factorial Central Composite Design was employed combining w...

Electrical Discharge Machine (EDM) parameters have a significant influence on machining characteristic like material removal rate (MMR) and tool wear rate (TWR). Inconel 718, which is widely used in the Medical, Marine, Architectural and food processing industries, is used as a work material. The tool electrode materials used are brass. Experiments are conducted using face centered central comp...

The process parameters, temperature, pH and substrate concentration, were optimized for the production of gentamicin using Micromonouspora echinospora. Experiments were carried out according to central composite design in response surface method. The optimum conditions for the maximum production of gentamicin were found to be: temperature – 31.7C, pH – 6.8 and substrate concentration – 3%. At t...

Production of ?-glucan is mainly used for cancer therapy. The most well-known are those occur in fungal grains such as cereal and other micro-organisms. The most important beta glucan from a nutritional and ingredient standpoint is that derived from fungal grain. Optimization of medium ingredients for the production of mycelial ?-glucan from lower fungi in submerged fermentation and antioxidant...

In this study, the effects of machining parameters on specific energy during surface grinding of 6061Al-SiC35P composites are investigated. Vol% of SiC, feed and depth of cut were chosen as process variables. The power needed for the calculation of the specific energy is measured from the two watt meter method. Experiments are conducted using standard RSM design called Central composite design ...