Diatoms are highly abundant unicellular algae that often dominate pelagic as well as benthic primary production in the oceans and inland waters. Being strictly dependent on silica to build their biomineralized cell walls, marine diatoms precipitate 240 × 10(12) mol Si per year, which makes them the major sink in the global Si cycle. Dissolved silicic acid (dSi) availability frequently limits diato

We describe computer simulation of a number of associative models of classical conditioning in an attempt to assess the strengths and weaknesses of each model. The behavior of the Sutton-Barto model, the TD model, the Klopf model, the Balkenius model and the Schmajuk-DiCarlo model are investigated in a number of simple learning situations. All models are shown to have problems explaining some of t

By counting the number of upcrossings of the mean level by a stationary Gaussian process one can estimate the mean frequency of the process. If the mean level is unknown and estimated from the observed mean level, then this crossing estimator is more or less biased, depending on the length of the observation interval. It is shown that if the interval is at least two mean wavelengths, then the bias

Carotid endarterectomy (CEA) is a standardized surgical procedure and is the third most common vascular surgical procedure in Sweden. To improve the quality of pre- and postoperative care for patients undergoing elective CEA, a standardized care plan (SCP) was developed and implemented during Spring of 2007 at a vascular clinic in Sweden. In order to spread light on obstacles and possibilities in

ABSTRACT: BACKGROUND: Previous animal studies have shown that Curcuma (C.) longa lowers plasma glucose. C. longa may thus be a promising ingredient in functional foods aimed at preventing type 2 diabetes. The purpose of the study is to study the effect of C. longa on postprandial plasma glucose, insulin levels and glycemic index (GI) in healthy subjects. METHODS: Fourteen healthy subjects were ass

Analysis of Ingmar Bergman's play Sista skriket (The Last Gasp) about the film director Georg af Klercker.

To assess the role of CHCHD2 variants in patients with Parkinson disease (PD) and Lewy body disease (LBD) in Caucasian populations.

A few studies have compared robotic-assisted laparoscopic pyeloplasty (RALP) with open pyeloplasty (OP) in children, but no previous study includes a long-term follow-up of renal function and hydronephrosis in combination with a thorough prospective follow-up of the RALP patients of at least 2 years.