This study investigates the mechanism of protein particle formation during ultrafiltration/diafiltration (UF/DF), finding that agitation drives particle formation by promoting protein-interface adsorption and desorption. Low conductivity and the presence of surfactant reduced the level of particle formation in small-scale stirring studies, and the same trends were observed in pumping and UF/DF....

Toxicity and metabolism of t-permethrin were evaluated in two colonies (UF and ARS) of the eastern subterranean termite, Reticulitermes flavipes (Kollar), collected in Gainesville, FL. The UF colony (LC50 = 1.86 micrograms per vial) was approximately twofold more tolerant of t-permethrin than the ARS colony (LC50 = 0.89 microgram per vial) at the LC50. The synergists piperonyl butoxide and S,S,...

The principle of ultrafiltration (UF) is filtration of solutions or suspensions under pressure through a semipermeable membrane. The membrane has pores that allow the solvent and small molecules to pass through and the larger molecules to be retained. Ultrafiltration may therefore be considered as both a concentration and a fractionation process according to the particular components of interes...

BACKGROUND Progressive peritoneal membrane injury and dysfunction are feared repercussions of peritoneal dialysis (PD), and may compromise the long-term feasibility of this therapy. Different strategies have been attempted to prevent or reverse this complication with limited success. METHODS We performed a randomized, open multi-centre trial, aimed at scrutinizing the efficacy of self-adminis...

Ultrafast (UF) NMR spectroscopy is an approach that yields 2D spectra in a single scan. This methodology has become a powerful analytical tool that is used in a large array of applications. However, UF NMR spectroscopy still suffers from an intrinsic low sensitivity, and from the need to compromise between sensitivity, spectral width, and resolution. In particular, the modulation of signal inte...

Fast-growing poplar wood was modified with low molecular weight ureaformaldehyde resin (UF) at 41.5% concentration or phenol-formaldehyde (PF) at concentrations of 15, 25, and 40%. The physical and mechanical properties were measured, and creep behavior tests were carried out under ambient indoor conditions. The specimens were subjected to 30 and 50% of their maximum bending load. The density, ...

[1] Time‐dependent buoyant plumes form at the outflow of tidally dominated estuaries. When estuary discharge velocity exceeds plume internal wave speed c, a sharp front forms at the plume’s leading edge that expands from the time‐dependent source. Using observations of the Columbia River tidal plume from multiple tidal cycles we characterize time‐evolving plume structure and quantify front spee...

The present study investigates major organic foulants in ultrafiltration (UF) of treated domestic wastewater and their removal in slow sand filtration. Identification and quantification of major foulants was conducted in labscale experiments. Quantified results suggest that biopolymers (large molecular protein-like and polysaccharidelike materials) are major organic foulants in UF. This conclus...

Background A novel technology has been developed for ultrafast (UF) singlephoton emission computed tomography (SPECT) myocardial perfusion imaging by employing a pin-hole collimation design and multiple cadmium zinc telluride crystal arrays. The purpose of this study was to compare myocardial perfusion imaging obtained by UF-SPECT with standard (S) SPECT in patients with known or suspected coro...

BACKGROUND The prevalence of heart failure (HF) is increasing rapidly with high readmission rates, mainly due to fluid retention. Ultrafiltration (UF) is a mechanical method for removing fluids. Since UF was introduced only recently in Israel, the skill and experience required for outpatient congested HF patients is scarce. OBJECTIVEs: To evaluate the feasibility and safety of UF therapy in con...