UNLABELLED Previously we demonstrated that arginine vasopressin (AVP) directly inhibits bicarbonate absorption (JHCO3, pmol/min per mm) in the medullary thick ascending limb (MTAL) of the rat. To determine whether changes in osmolality also may affect bicarbonate absorption, MTAL were studied in vitro with 25 mM HCO3- solutions. Control osmolality was 290 mosmol/kg H2O. In the absence of AVP, i...

Winter rapeseed (Brassica napus L.) has potential to become an alternate oilseed crop both for edible oil production and energy agriculture (biofuel production) for Turkey. This study was conducted to determine the effect of year, N sources and doses on the yield and quality traits of winter rapeseed in a cereal system in calcareous soils over two seasons, 2000-2001 and 2001-2002, in Central An...

Three 2´-deoxynucleosides containing semi-flexible spin labels, namely (T)A, (U)A and (U)C, were prepared and incorporated into deoxyoligonucleotides using the phosphoramidite method. All three nucleosides contain 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) connected to the exocyclic amino group; (T)A directly and (U)A as well as (U)C through a urea linkage. (T)A and (U)C showed a minor destab...

Abstract This study sought to compare the efficiency of different nitrogen (N) fertilizer forms applied perennial ryegrass swards that were rotationally grazed by dairy cows or sheep under Irish conditions for two three years. A 3 × 2 factorial random complete block design plot arrangement was used calcium ammonium nitrate (CAN), urea and + N-(n-butyl) thiophosphoric triamide (urea NBPT) at 150...

BACKGROUND To investigate the predictive values of preoperative and postoperative serum CA19-9 levels on survival and other prognostic factors including early recurrence in patients with resectable hilar cholangiocarcinoma. RESULTS In univariate analysis, increased preoperative and postoperative CA19-9 levels in the light of different cut-off points (37, 100, 150, 200, 400, 1000 U/ml) were si...

Feed additives belong to a number of climate change mitigation strategies being sought reduce methane emissions in ruminants. In this study, the effect biochar or and urea supplementation on dairy cow performance production was assessed. Eighteen cows were used 3 × latin square design with three feeding groups: control no (CO), (BC, 200 g/day) (BC + U, g/day 90 urea). All fed forage m...

Improvements in nitrogen (N) use efficiency reduce stress on the environment and improve tomato production. A two-year trial was conducted greenhouse tomatoes with a split-plot design, which one factor N application rate (150 kg·ha?1, N1; 200 N2; 250 N3) two other factors were type of urea applied (urea, T1; slow-release (polymer-coated) urea, T2, nitrification inhibitors (3,4-dimethylpyrazole ...

P KEVIOUS studies have shown that, in the frog, urea is excreted in part by tubular activity. Marshall and Crane in their classic paper on the secretory function of renal tubules (I) emphasized that urea ex-cretion in frogs differed from that in mammals and resembled phenol red elimination in frogs and mammals in that its excretory efficiency (U/P ratio) was depressed as plasma concentrations w...

Objetivo: Identificar los resultados de laboratorio asociados con el riesgo muerte en pacientes hospitalizados por la COVID-19. Material y métodos: estudio cohorte retrospectivo admitidos COVID-19 Hospital Nacional EsSalud Guillermo Almenara Irigoyen Lima, entre 21 marzo 12 mayo 2020. Las pruebas incluidas fueron las del ingreso al hospital. Se hizo un análisis Cox para determinar factores muer...