Modification of the pH of kaolin-serum treatment produces hemagglutination-inhibition test results comparable with the plaque neutralization test in duck embryo tissue culture; the standard treatment does not.

This paper extends existing methods that jointly estimate the process and friction model parameters, so that a nonlinear process model structure is considered. In addition, nonlinear optimization is applied to estimate the friction model parameters. The developed estimation algorithm is tested with data generated by a hybrid setup (composed of a real valve and a simulated pH neutralization proc...

Biofilms are comprised of bacterial-clusters (microcolonies) enmeshed in an extracellular matrix. Streptococcus mutans can produce exopolysaccharides (EPS)-matrix and assemble microcolonies with acidic microenvironments that can cause tooth-decay despite the surrounding neutral-pH found in oral cavity. How the matrix influences the pH and bacterial activity locally remains unclear. Here, we sim...

ABSTRACT: Degumming and neutralization processes are two essential stages carried out on crude edible oils in order to remove some unwanted impurities namely gums and free fatty acids. In this research study two popular less expensive commercial oils that are consumed to a great extent namely soyabean and sunflower seed oils are selected and subjected to both degumming and neutralization proces...

This study investigated the potential for utilizing six treatment agents (two limestones, sand, starfish, black shale, and concrete as treatment agents for acid mine drainage (AMD) wastewater. These materials, with a high capacity for heavy metals, can be obtained and employed as alternative low-cost limiting substitutes. For investigating the neutralization capacity, the change in pH, Eh, and ...

Physiological cervicovaginal acidity can partly inactivate human immunodeficiency virus (HIV). Basic semen components should be able to partially neutralize in vivo cervicovaginal pH. The goals of the study were to evaluate the relationship between cervicovaginal pH and presence of semen components in sexually active African women and to assess whether vaginal douching with water performed just...

The classical control theory is based on the design of linear controllers for systems described by linear models. However, there exist some situations where it is not recommended, or even impossible, to use a linear controller. One of those situations arises when the magnitude of the process gain experiences a dramatic variation within the operating range of interest. A classic example of a che...

Nine virulent bacteriophages of the anaerobe Corynebacterium (Propionibacterium) acnes, the P-a series, are DNA phages, with long, curved nonretractile tails (130 nm) without tail plates or fibers. They have isometric heads (420 by 460 nm), and are placed in Bradley's group B-1. There is permanent plaque suppression at highest phage concentrations. After 100- to 1,000-fold dilution, plaques are...

Scale is widely observed in the hydrated lime mine drainage treatment plant of Daedeok South Korea. In order to understand environment terms formation scale minerals, and water were collected from AMD facility analyzed. addition, saturation index was calculated based on geochemical modeling predict minerals that could be produced facility, results then compared with an analysis onsite minerals....