Given an infinite sequence of positive integers A, we prove that for every nonnegative integer k the number of solutions of the equation n = a1 + · · ·+ak, a1, . . . , ak ∈ A, is not constant for n large enough. This result is a corollary of our main theorem, which partially answers a question of Sárközy and Sós on representation functions for multivariate linear forms. Additionally, we obtain ...

OBJECTIVE To evaluate the feasibility and efficiency of one-stage external fixation by using locking plate in distal tibial fractures. METHODS In this non-control prospective study, 28 patients with distal tibial fractures were included and underwent one-stage external fixation by using locking plate. There were 21 males and 7 females, with a mean age of 43 years (19-63). According to AO/OTA ...

background & aims: mistyping either a donor or a recipient can lead to transfusion with abo incompatible blood which results in severe intravascular hemolysis and may even result in the death of the recipient. abo phenotype is one of the essential tests in immunohematology. eighty percent of blood group a and ab persons are subtype a1 and a1b, respectively. the other 20% of these blood groups a...

To investigate the role of inner medullary collecting duct (IMCD) urea transporters in the renal concentrating mechanism, we deleted 3 kb of the UT-A urea transporter gene containing a single 140-bp exon (exon 10). Deletion of this segment selectively disrupted expression of the two known IMCD isoforms of UT-A, namely UT-A1 and UT-A3, producing UT-A1/3(-/-) mice. In isolated perfused IMCDs from...

Two subspecies of Francisella tularensis are recognized: F. tularensis subsp. tularensis (type A) and F. tularensis subsp. holartica (type B). Type A has been subdivided further into A1a, A1b, and A2, which differ geographically and clinically. The aim of this work was to determine whether or not differences among subspecies and clades translate into distinct ecological niches. We used 223 isol...

This paper reports a study of the influence outdoor natural aging on paint coatings applied to back three commercial solar glass mirrors (A1, C2, and D2) under two different exposure environments (marine desert) in Morocco for period about years. The assessment was carried out through colorimetric measurements FTIR-ATR (Attenuated total reflection-Fourier transform infrared) analyses top coat p...

In this work, 2-F-4-OH benzoic acid was isolated in Ar matrices and conformational changes were induced by near-IR irradiating the sample. Upon deposition, three conformers could be observed matrix, denoted as A1, A2, D1, respectively. A1 A2 are trans carboxylic acids, i.e., there is an intramolecular H bond between carbonyl O atoms COOH group, whereas D1 a cis with F atom which otherwise has s...

The purpose of this study was to determine the improvement fine motor skills through Clay media in children with Down syndrome at Yayasan Melati Anak Bangsa Martapura. approach used is a quantitative type SSR (Single Subject Research) research. design A1-B-A2, for A1 baseline phase 1, B intervention and A2 2 data recording technique uses direct observation using magnitude recording. analysis gr...