The influence of adsorption-desorption phenomena and distribution of pore sizes on lhe leaching beh.viour of two herbicides, thiazafluron (highly polar, nonionic) and clopyralid (anionic) in three soils has been studied. Adsorption d.ta, obtained by b.tch equilibriwn, were fitted to Freundlich equation and Kf values calculated. Pore size distribution of the soils was studied by mercury porosime...

The host status of 50 commercial maize hybrids for a Mississippi population of Rotylenchulus reniformis was determined in greenhouse experiments. Reproduction was measured by determining RF values ([final egg number + juveniles and vermiform adults in soil] / initial egg number) and number of eggs per gram of fresh root. All hybrids maintained R. reniformis below the initial population level, i...

STUDY OBJECTIVES To determine the utility of forced oscillation technique (FOT) for measuring pulmonary resistance and reactance in patients with central nervous system injuries, for detection and follow-up of posttracheostomy tracheal stenosis. DESIGN Case series. SETTING A rehabilitation hospital, Brasilia, Distrito Federal, Brazil. PATIENTS Ten consecutive neurologically impaired patie...

Strained silicon channel FETs grown on virtual SiGe substrates show clear potential for RF applications, in a material system compatible with silicon VLSI. However, the optimisation of practical RF devices requires some care. 0.1-0.12pm gate length designs are investigated using Monte Carlo techniques. Although structures based on 111-V experience show fT values of up to 94 GHz, more realistic ...

Purpose: To adapt a magnetization-prepared RF cycled spiral imaging technique, termed T1prep, for time-efficient RF-insensitive clinical prostate T1 quantification at 1.5 tesla, and evaluate SNR limits to voxel-based T1 mapping. Materials and Methods: A magnetization-prepared spiral imaging technique was adapted for robust T1 contrast development, multi-slice imaging within 5-minutes, and data ...

Purpose: One of the most important issues regarding radio frequency electromagnetic fields (RF‐EMF) is their effect on genetic material. Therefore, we investigated the cytogenotoxic effects of 900 MHz radio frequency electromagnetic fields (RF‐EMF) and the effect of a recovery period after exposure to RF‐EMF on bone marrow cells of immature and mature rats. Materials and methods: The immature a...

the effect of membrane molecular weight cut off (mwco) at three levels (10, 20 & 50 kd) on dynamic behavior of permeate flux (jp), hydraulic resistances (total hydraulic resistance, rt; reversible fouling resistance, rrf; irreversible fouling resistance, rif and membrane hydraulic resistance, rm) and milk solutes rejection (protein, rp; fat, rf; lactose, rl; minerals, rm and total solids, r...

INTRODUCTION The aim of this study was to examine seroconversion and the relationship with age and inflammation of autoantibodies in a large group of patients attending an outpatient rheumatology clinic. METHODS Levels of antibodies to citrullinated proteins/peptides (ACPAs) and IgM rheumatoid factor (IgM-RF) were determined in 22,427 samples collected from 18,658 patients. The diagnosis was ...

The visual system utilizes binocular disparity to discriminate the relative depth of objects in space. Since the striate cortex is the first site along the central visual pathways at which signals from the left and right eyes converge onto a single neuron, encoding of binocular disparity is thought to begin in this region. There are two possible mechanisms for encoding binocular disparity throu...