In mammalian cells, the uptake of amino acids is mediated by specialized, energy-dependent and passive transporters with overlapping substrate specificities. Most energy-dependent transporters are coupled either to the cotransport of Na+ or Cl- or to the countertransport of K+. Passive transporters are either facilitated transporters or channels. As a prelude to the molecular characterization o...

RESUMEN. La quitosana es usada ampliamente en la agricultura por su efecto fungistático, además alarga la vida postcosecha de frutos y vegetales y estimula el crecimiento de las plantas. Sin embargo, ha sido poco estudiado el uso de este biopolímero en la inducción de tolerancia a la salinidad, por lo que el objetivo de este trabajo fue comprobar si el tratamiento a las semillas con quitosana r...

A theory is described for the variation in the rate constants for formation of different ozone isotopomers from oxygen atoms and molecules at low pressures. The theory is implemented using a simplified description which treats the transition state as loose. The two principal features of the theory are a phase space partitioning of the transition states of the two exit channels after formation o...

Neuroendocrine tumours (NET) are rare tumours that occur most commonly in the GI tract. Various labelled somatostatin analogues are used to image NET expressing somatostatin receptors (SSTR). In traditional nuclear medicine, most peptides used in imaging NET have been labelled with indium-111, the commonest being indium-111octreotide (111In-octreotide). Unfortunately, the unfavourable physical ...

Introduction MRI is a high spatial resolution non-invasive technique but it has low specificity for targeting explicit pathologies. In an effort to improve specificity, MRI contrast agents with strong paramagnetic properties such as Gadolinium have been developed. However recent reports of suspected deaths associated with gadolinium administration have severely limited their use [1-2]. Iron oxi...

Conformational restriction is a useful approach for ligand design in organic and medicinal chemistry. This manuscript reports the facile synthesis and in silico conformational analysis of two new diastereomeric [3.2.2]-3-azabicyclic, two new [3.2.1]-3-aza-8-oxy-bicyclic and one new [3.2.1]-3-azabicyclic diamine scaffolds. A conformational analysis of these structures along with calculation of c...

____________ _ Complement activation induced by latex, polyvinylchloride, and silicone tubings for extracorporeal circulation was studied in 2 in vitro situations: Fresh whole human blood mixed with priming solution was circulated through 1 00 em tubing lengths for 1 hour, and small tubing pieces were incubated in fresh human serum for 7 hours. Activation of C3 and of the terminal pathway (C5-C...

Alternative materials for plasmonic devices have garnered much recent interest. A promising candidate material is titanium nitride. Although there is a substantial body of work on the formation of this material, its use for plasmonic applications requires a more systematic and detailed optical analysis than has previously been carried out. This paper describes an initial optimization of sputter...

One of the major drawbacks in Orthogonal Frequency Division multiplexing(OFDM) is high Peak to Average Ratio (PAPR).Reducing PAPR will not only reduces the complexity of Digital to Analog and Analog to Digital converters but also increases the efficiency of High Power Amplifiers (HPA). In this paper a combination of precoding technique (DCT) and clipping technique has been proposed for PAPR red...

Carotid bifurcation stenosis may coexist simultaneously with more proximal common carotid artery (CCA) atherosclerotic plaquing, primarily at the vessel origin in aortic arch. Obtaining long-term outcomes data is vital to making any definitive conclusions on efficacy of performing this dual treatment. Four cohorts were created for perioperative outcome analysis and Kaplan-Meier freedom from eve...