UNLABELLED Although thallium-201 (201Tl) uptake is related to perfusion in many normal tissues, the biologic rationale for 201Tl uptake in tumors is uncertain. To determine if tumor uptake is related to cell proliferation, we correlated the relative retention of 201Tl in lung tumors with expression of Ki-67, an indicator of cell proliferation. METHODS Sixty patients with lung tumors, included...

Many watershed models employ the Soil Conservation Service Curve Number (SCS-CN) approach for runoff simulation based on soil and land use information. These implicitly assume that is generated by Hortonian process and; therefore, cannot correctly account effects of topography, variable source area (VSA) and/or moisture distribution in a watershed. This paper presents new distributed CN-VSA met...

customer activity has received more attention due to the increase of social network applications. moreover, customer activity could be an answer to the research debate about the significant relationship between retention rate and lifetime profitability of customers. several researchers believe that an increase in the retention rate of customers may enhance their customer lifetime value (clv), o...

Natural geological conditions together with the impact of human activities could produce environmental problems due to high As concentrations. The aim of this study was to assess the role of epipsammic biofilm-sediment systems onto As (V) sorption and to evaluate the effect of the presence of equimolar P concentrations on As retention. A natural biofilm was grown on sediment samples in the labo...

1 Department of Biology, Southeast Missouri State University, Cape Girardeau, MO 63701, USA. 2 CNRS-UMR5175 CEFE, Centre d’Ecologie Functionnelle et Evolutive, 1919 route de mende, 34293 Montpellier cedex 5. 3 College of Sciences, The University of Findlay, Findlay, Ohio 45840, USA. 4 Department of Biological Sciences, Southeastern Louisiana University, Hammond, LA 70402, USA. * Corresponding a...

Recent studies at California State University, Northridge using the Kolbe ATM index have shown differences in conative profiles between computer science students near graduation and those just entering the program. Since conation, or a person's inherent talent or natural way of doing things, relates to how a student approaches learning, it may provide clues as to why some students quit the prog...

background several studies showed that dopamine and norepinephrine improve retention and retrieval of memory. methylphenidate is an enhancer of dopamine and norepinephrine in brain. objectives in the present study, the effect of methylphenidate was evaluated on retention and retrieval of memory in young and aged mice using passive avoidance apparatus. materials and methods animals were divided ...

The main purpose of this multicenter ex post facto prospective study is to examine the psychometric properties of the Addiction Severity Index version 6.0 (ASI-6) in Spanish outpatients and determine the predictor variables of treatment adherence. A total of 186 outpatients with a substance dependence diagnosis (mean age 40 years; 80% male) were assessed with the ASI-6 and Clinical Global Impre...