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Sensor and biosensor based on Prussian Blue modified gold and platinum screen printed electrodes

Gold (Au) and platinum (Pt) screen-printed electrodes were modified with Prussian Blue (PB) for the development of amperometric sensors selective for hydrogen peroxide detection. The sensors exhibited sensitivities towards H2O2 equal to 2 A M−1 cm−2 for Au and 1 A M−1 cm−2 for Pt electrodes. The sensors were also employed as the basis for construction of glucose biosensors through further modifica

Influences of Endogenous and Exogenous Hormones in Middle-aged Women

Endogenous and exogenous sex hormones are of pivotal importance for women’s health. Hormone therapy has been widely studied but there is limited data about androgen and androgen replacement therapy. The aim of this study was to delineate the possible interrelations between endogenous androgens and women’s particularly pertaining to cardiovascular disease (CVD) and risk markers for CVD in perimeno

Food web dynamics in correlated and autocorrelated environments

The densities of populations in a community or food web vary as a consequence of both population interactions and environmental (e.g. weather) fluctuations. Populations often respond to the same kinds of environmental fluctuations, and therefore experience correlated environments. Furthermore, some environmental factors change slowly over time, thereby producing positive environmental autocorrelat

Hele-Shaw flow on hyperbolic surfaces

Consider a complete simply connected hyperbolic surface. The classical Hadamard theorem asserts that at each point of the surface, the exponential mapping from the tangent plane to the surface defines a global diffeomorphism. This can be interpreted as a statement relating the metric flow on the tangent plane with that of the surface. We find an analogue of Hadamard's theorem with metric flow repl

Kurser i grundläggande forskningsmetodik till nytta för kliniker. Tolv års erfarenheter från Sydsverige

Allt sedan 1989 har vi i den södra sjukvårdsregionen gett en 20-poängskurs i grundläggande forskningsmetodik. Vår målsättning har varit att ge många läkare en basal vetenskaplig skolning till glädje för den vardagsnära kvalitetsutvecklingen och verksamhetsuppföljningen, men också att stimulera enstaka läkare till att påbörja en regelrätt forskarutbildning. Vi har genom åren presenterat utvecklingeAt the Department of Community Medicine at Lund University we have given courses in basic research methodology since 1989. The course has yielded 20 points of university credit, the equivalent of one full-time semester of studies, and it has been run part-time, covering one and a half years. Our aim has been to provide a large number of physicians with basic training in research methods, and to st

Measurement of rainfall interception by xerophytic shrubs in re-vegetated sand dunes

More than 40 years of re-vegetation using mainly xerophytic shrubs Artemisia ordosica Krasch. and Caragana korshinskii Kom. at Shapotou Desert Experimental Research Station near Lanzhou, China has resulted in established dwarf-shrub and herbaceous cover on sand dunes. Precipitation, as the sole source of water replenishment in the semiarid area, plays a pertinent role in sustaining the desert ecos

Use of phosphorus release batch tests for modelling an EBPR pilot plant

The aim of this study was to evaluate how routinely performed phosphorus release tests could be used when modelling enhanced biological phosphorus removal (EBPR) using activated sludge models such as ASM2d. A pilot plant with an extensive analysis programme was used as basis for the simulations. Without any calibration the prediction of phosphorus removal was poor and the initial release rates fro

Changes in bone mineral, lean body mass and fat content as measured by dual energy X-ray absorptiometry: a longitudinal study

Bone mineral density (BMD) and soft tissue composition were measured by dual energy X-ray absorptiometry (DXA) 3-4 years apart in 273 men and women aged 23-90. We found different rates of BMD loss in different skeletal regions. There were also different rates of BMD loss in different regions within the hip. Average rates of loss for male subjects 50 years of age and above for BMD total body were 0

Thermal manikin measurements - exact or not?

According to the European prestandard ENV 342:1998, the thermal insulation of cold-protective clothing is measured with a thermal manikin. Systematic studies on the reproducibility of the values, measured with different types of clothing on the commonly used standing and walking manikins, have not been reported in the literature. Over 300 measurements were done in 8 different European laboratories