There are several long term water quality issues associated with discharging nutrients, specifically nitrogen and phosphorus into receiving water streams that are very difficult to manage. Due to these concerns many environmental regulatory agencies have either established nutrient discharge criteria or in the process of developing nutrient management plans. If a wastewater treatment plant is r...

STANCHEV, V., D. GEORGIEV and S. GARGOVA, 2010. Mathematical modeling of the nutrient medium composition for the production of yeast phytase. Bulg. J. Agric. Sci., 16: 628-634 The objective of the present study was the optimization of the nutrient medium composition for Candida melibiosica 2491 cultivation by means of mathematical methods of modeling and production of yeasts with higher enzyme ...

Implicit in discussions of plant nutrition and climate change is the assumption that we know what to do relative to nutrient management here and now but that these strategies might not apply in a changed climate. We review existing knowledge on interactive influences of atmospheric carbon dioxide concentration, temperature and soil moisture on plant growth, development and yield as well as on p...

in the process of milk production, the highest cost relates to animal feed. based on reports provided by the experts, around seventy percent of dairy livestock costs included feed costs. in order to minimize the total price of livestock feed, according to the limits of feed sources in each region or season, and also the transportation and maintenance costs and ultimately milk price reduction, o...

Current concepts in cement Total Hip Arthroplasty advocates optimization of mechanical interlock of cement (PMMA) with trabecular bone. The Third generation cementing technique has been developed to achieve this with the use of cement gun retrograde cementing within the proximal femur and pressurization of the cement with wedge or surgeon’s thumb. The forces generated by cement compression duri...

Fast growth represents an effective strategy for microbial organisms to survive in competitive environments. To accomplish this task, cells must adapt their metabolism to changing nutrient conditions in a way that maximizes their growth rate. However, the regulation of the growth related metabolic pathways can be fundamentally different among microbes. We therefore asked whether growth control ...

We calculate values of forest carbon sequestration and nutrient recycling applying the replacement cost method. The value is then determined as the savings in costs by the replacement of more expensive abatement measures with these ecosystem services in cost-effective climate and nutrient programs. To this end, a dynamic optimization model is constructed, which accounts for uncertainty in seque...

The regulation of metabolic activity by tuning enzyme expression levels is crucial to sustain cellular growth in changing environments. Metabolic networks are often studied at steady state using constraint-based models and optimization techniques. However, metabolic adaptations driven by changes in gene expression cannot be analyzed by steady state models, as these do not account for temporal c...