Learn More
Batch kinetic studies were carried out on rhamnolipid biosurfactant production from synthetic medium, industrial wastes viz. distillery and whey waste as substrates. The results indicated that the specific growth rates (μ max) and specific product formation rates (V max) from both the wastes are comparatively better than the synthetic medium, revealing that(More)
Biological treatment of wastewater basically reduces the pollutant concentration through microbial coagulation and removal of non-settleable organic colloidal solids. Organic matter is biologically stabilized so that no further oxygen demand is exerted by it. The biological treatment requires contact of the biomass with the substrate. Various advances and(More)
Wastewater generated during coke-oven gas cleaning operations in the integrated steel plant contains phenol, cyanide, thiocyanate, and also oil and grease. Although the activated sludge process is widely practiced for biological treatment of coke-oven wastewater, it was observed during the evaluation of performance of full scale coke-oven wastewater(More)
The effect of vignetting is undesirable in image processing and analysis. It cause fall-off of pixel intensity from centre towards edges of the image. In this paper, we propose a new procedure of fast vignetting reduction based on two images acquired with different camera/lens settings. The change of lens aperture or focal length will also change the effect(More)
Vignetting refers to the fall-off pixel intensity from the centre towards the edges of the image. This effect is undesirable in image processing and analysis. In the literature, the most commonly used methods of vignetting correction assume radial characteristic of vignetting. In the case of camera lens systems with non-radial vignetting, such approach(More)
Methane utilizing bacterial strain was isolated and found to produce a surface active compound while growing on methane. The maximum production of the surface active compound depended on pressure of methane and air in the reactor. The crude surface active compound was extracted from the cell free broth and its surface active and emulsification properties(More)
The vignetting is one of image distortions, which refers to the fall-off of pixel intensity due to optical properties of the camera and lens system. The effect of vignetting on image is unwanted in image processing and analysis. The vignetting of the camera-lens system can be determined using the vignetting model. The local vignetting polynomial model(More)
The gel electrophoresis is a method of separation of substances possessing electrical charge using the difference of their mobility in the electric field. The rate of migration of a fragment of a protein or DNA depends on the intensity of the constant electric field, on its resultant charge and the friction coefficient [1,2]. The effect of the electrical(More)
The paper presents a new technique of image enhancement. The described algorithm enables the suppression of noise and contrast enhancement. The interesting feature of this new algorithm is that its iterative use leads to the image segmentation. The algorithm is based on a concept of a virtual particle, which performs a special kind of a random walk —(More)
  • 1