Absorption spectra and fluorescence properties o f 2,3-dihydro-4( 1 H)-quinolinone deriva­ tives were studied at room temperature in different solvents. It has been found that the fluo­ rescence quantum yields and fluorescence decay times strongly depend on the molecular struc­ ture and solvent polarity. The character and the energy o f excited states were determined by PPP and CNDO /S quantum-...

We study nonlinear control systems in the plane, affine with respect to control. We introduce two sets of feedback equivariants forming a phase portrait PP and a parameterized phase portrait PPP of the system. The phase portrait PP consists of an equilibrium set E, a critical set C (parameterized, for PPP), an optimality index, a canonical foliation and a drift direction. We show that under wea...

The growing complexity of heterogeneous cellular networks (HetNets) has necessitated a variety of user and base station (BS) configurations to be considered for realistic performance evaluation and system design. This is directly reflected in the HetNet simulation models proposed by standardization bodies, such as the third generation partnership project (3GPP). Complementary to these simulatio...

BACKGROUND Public-private partnerships (PPP) could be effective in scaling up services. We estimated cost and cost-effectiveness of different PPP arrangements in the provision of tuberculosis (TB) treatment, and the financing required for the different models from the perspective of the provincial TB programme, provider, and the patient. METHODS Two different models of TB provider partnership...

In this paper the relevance of the PPP as a long-run relationship is studied using a panel of Latin American and Asian countries. We investigate the stationarity of real exchange rates by applying a new panel unit root test that is robust to structural breaks due to currency crises. It turns out that the long-run PPP relationship is relevant for the Asian countries, which experienced a flexible...

OBJECTIVES To investigate the trends and correlations of gross domestic product (GDP) adjusted for purchasing power parity (PPP) per capita on suicide rates in 10 WHO regions during the past 30 years. DESIGN Analyses of databases of PPP-adjusted GDP per capita and suicide rates. Countries were grouped according to the Global Burden of Disease regional classification system. DATA SOURCES Wor...

Unlike most other cell types, neurons preferentially metabolize glucose via the pentose phosphate pathway (PPP) to maintain their antioxidant status. Inhibiting the PPP in neuronal cell models causes cell death. In rodents, inhibition of this pathway causes selective dopaminergic cell death leading to motor deficits resembling parkinsonism. Using postmortem human brain tissue, we characterized ...

BACKGROUND Evidence from animal studies suggests that exposure to organophosphate flame retardants (PFRs) can disrupt endocrine function and impair embryo development. However, no epidemiologic studies have been conducted to evaluate effects on fertility and pregnancy outcomes. OBJECTIVES We evaluated associations between urinary concentrations of PFR metabolites and outcomes of in vitro fert...

The presence of cytosolic and plastidic pathways of carbohydrate oxidation is a characteristic feature of plant cell metabolism. Ideally, steady-state metabolic flux analysis, an emerging tool for creating flux maps of heterotrophic plant metabolism, would capture this feature of the metabolic phenotype, but the extent to which this can be achieved is uncertain. To address this question, fluxes...

Abstract Integrity monitoring for precise point positioning is critical safety-related applications. With the increasing demands of high-accuracy autonomous navigation unmanned ground and aerial vehicles, integrity method high-precision has become an essential requirement. While high precision Global Navigation Satellite Systems (GNSS) widely used in such applications, there are still many diff...