Bicoronary infusion of nitroglycerin and atrial natriuretic peptide improves diastolic distensibility in healthy pigs

Cardiolog

Bicoronary infusion of nitroglycerin and atrial natriuretic peptide improves diastolic distensibility in healthy pigs

Cardiolog

Optimization of biogas supply networks considering multiple objectives and auction trading prices of electricity

Abstract This contribution presents an hourly-based optimization of a biogas supply network to generate electricity, heat and organic fertilizer while considering multiple objectives and auction trading prices of electricity. The optimization model is formulated as a mixed-integer linear programming (MILP) utilizing a four-layer biogas supply chain. The model accounts for biogas plants based on two capacity levels of methane to produce on average 1 ± 0.1 MW and 5 ± 0.2 MW electricity. Three objectives are put forward: i) maximization of economic profit, ii) maximization of economic profit while considering cost/benefits from greenhouse gas (GHG) emissions (economic+GHG profit) and iii) maximization of sustainability profit. The results show that the economic profit accrued on hourly-based auction trading prices is negative (loss), hence, four additional scenarios are put forward: i) a scenario whereby carbon prices are steadily increased to the prevalent eco-costs/eco-benefits of global warming; ii) a scenario whereby all the electricity auction trading prices are multiplied by certain factors to find the profitability breakeven factor, iii) a scenario whereby shorter time periods are applied, and investment cost of biogas storage is reduced showing a relationship between cost, volume of biogas stored and the variations in electricity production and (iv) a scenario whereby the capacity of the biogas plant is varied from 1 MW and 5 MW as it affects economics of the process. The models are applied to an illustrative case study of agricultural biogas plants in Slovenia where a maximum of three biogas plants could be selected. The results hence present the effects of the simultaneous relationship of economic profit, economic+GHG profit and sustainability profit on the supply and its benefit to decision-making

The soluble guanylate cyclase (sGC) stimulator BAY 41-8543 exerts a negative inotropic effect in healthy pigs

Cardiolog

The inotropic effect of mild hypothermia exceeds the force-frequency relationship in healthy pigs

Cardiolog

Limited prediction of incomplete left ventricular relaxation from diastolic time intervals and the isovolumic relaxation constant tau

Cardiolog

Effects of the soluble guanylate cyclase (sGC) stimulator BAY 41-8543 on myocardial function in healthy pigs

Cardiolog