Search results for "Sport System"

Intracellular accumulation of l-Arg, kinetics of transport, and potassium leak conductance in oocytes from Xenopus laevis expressing hCAT-1, hCAT-2A,…

2004

AbstractCationic amino acid transporters play an important role in the intracellular supply of l-Arg and the generation of nitric oxide. Since the transport of l-Arg is voltage-dependent, we aimed at determining the intracellular l-Arg concentration and describing the transport of l-Arg in terms of Michaelis–Menten kinetics, taking into account membrane voltage. The human isoforms of the cationic amino acid transporters, hCAT-1, hCAT-2A, and hCAT-2B, were expressed in oocytes from Xenopus laevis and studied with the voltage clamp technique and in tracer experiments. We found that l-Arg was concentrated intracellularly by all hCAT isoforms and that influx and efflux, in the steady state of e…

Oscillating ultra-cold neutron spectrometer

2019

The energy spectrum of ultra-cold neutrons (UCN) is very often a key point to determine the systematic effects in precision measurements utilizing UCN. The proposed novel method allows the in-situ measurements of the UCN velocity distribution and its time evolution. In addition, the proposed UCN spectrometer can be a handy diagnostic tool for monitoring the UCN spectrum in critical places in the transport system connecting an UCN source with experiments. In this paper, we present the preliminary results from measurements and simulations using the oscillating UCN spectrometer at the PSI UCN source.

Na+ -dependent neutral amino acid transporters A, ASC, and N of the blood-brain barrier: mechanisms for neutral amino acid removal.

2004

Four Na+-dependent transporters of neutral amino acids (NAA) are known to exist in the abluminal membranes (brain side) of the blood-brain barrier (BBB). This article describes the kinetic characteristics of systems A, ASC, and N that, together with the recently described Na+-dependent system for large NAA (Na+-LNAA), provide a basis for understanding the functional organization of the BBB. The data demonstrate that system A is voltage dependent (3 positive charges accompany each molecule of substrate). Systems ASC and N are not voltage dependent. Each NAA is a putative substrate for at least one system, and several NAA are transported by as many as three. System A transports Pro, Ala, His,…

Study regarding the improvement of the postage transport system in the city of Sibiu

2021

This paper presents a study on the improvement of postal system in the city of Sibiu where there are a number of three post offices that serve a number of eight counters, to which are added the distribution point and the collection point. Each post office has a well-established work schedule that differs from one office to another. The transport of postal items between the counters / post offices within the municipality of Sibiu and the collection office, must be done on a certain route, in order to respect the work schedule of each office and to take into account a number of restriction factors. In order to streamline the process of collecting and distributing postal items in Sibiu, 6 rout…

Deploying harmonized ITS services in the framework of EasyWay project

2012

In the last decade, the use of new technologies in the transportation domain has made possible the development of the Intelligent Transport System (ITS). However, the ITS services were deployed isolated. The purpose of the EasyWay Project is to involve all the European countries to deploy harmonized ITS services taking into account the European citizen as final In this paper, an introduction of EasyWay project is done, including the ITS concept services and the Deployment Guidelines. A deployment guideline for traffic management and corridors is presented. Using this guideline, a real Spanish Traffic management Plan is analyzed.

Btn2p is involved in ethanol tolerance and biofilm formation in flor yeast

2008

Flor yeasts are a particular kind of Saccharomyces cerevisiae strains involved in Sherry wine biological ageing. During this process, yeasts form a film on the wine surface and use ethanol as a carbon source, producing acetaldehyde as a by-product. Acetaldehyde induces BTN2 transcription in laboratory strains. Btn2p is involved in the control of the subcellular localization of different proteins. The BTN2 gene shows a complex expression pattern in wine yeast, increasing its expression by acetaldehyde, but repressing it by ethanol. A flor yeast strain transcribes more BTN2 than a first fermentation yeast during growth, but less under different stress conditions. BTN2 deletion decreases flor …

PARKING PRICING FOR A SUSTAINABLE TRANSPORT SYSTEM

2014

The purpose of this study has been to develop a model to designing an efficient parking pricing policy. The aim is an intelligent control and management system of parking pricing integrated with a redefinition of the circulation scheme to define a limited traffic zone in the central business district of Palermo. The transport demand over the entire area of the town has been studied in order to design various parking pricing scenarios with the application of an additional cost on parking inside the selected area of the CBD. This area attracts most of the private vehicular traffic and it is characterized by university faculties, schools, hospitals, offices and commercial areas. The optimal ho…

A methodology to improve public transport system

2012

The quality of pedestrian routes of access to public transport system (PTS) is an important aspect for the choice of transport mode, that can be evaluated also using some indicators as accessibility, comfort, frequency, etc... The policies for urban sustainable mobility must reflect the design and management of mass transit systems, but also the judgment of users in term of quality and perception of PTS. The purpose is reassess slow mobility encouraging the intermodal mobility between pedestrian and public transport. So the walking can be considered as alternative mode of urban transport and a moment of break from the chaos of modern life. It’s role should be considered as an important elem…

The role of passenger modal shift nodes in the interaction between land use and transport system.

2011

Athletic career transition : a qualitative inquiry into ex-athletes' experiences of the sports system in Singapore

2012

Anecdotally, studies on athletic career development and/ or transition revealed that athletes tend to have difficulty immersing their lifestyle into the societal norm after the termination of their athletic career. Based on a cross-cultural study by Alfermann & Stambulova (2002), the phenomenon of athletes coping with this change is no different whether it is voluntary or involuntary termination, and whether the country’s existing sports system does provide assistance in their transitions; within or out of the athletic career. There is a lack of research and empirical evidence to support these claims. The purpose of the study was to qualitatively explore ex athletes’ experiences in their at…