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Solid-phase extraction (SPE) is one the most common sample preparation techniques in many laboratories. Optimization of analyte specificity and recovery is crucial for high-sensitivity detection and analysis robustness/reproducibility. The optimization process usually starts with screening for a suitable extraction phase for a certain analyte (e.g. reversed-phase or HILIC) or if the extraction pha

This chapter reviews the emerging body of literature on critical theories of leadership. It begins by putting critical approaches to leadership in the context of broader debates about leadership. It notes that most existing work builds on either functional or interpretive assumptions. After noting some of the shortcomings with these directions, this chapter offers an alternative set of ideas based

The long-lasting and possibly not very useful question of whether women’s and men’s leadership are similar or differ has not led to conclusive answers. This chapter discusses different stances of the no-difference and the gender-stereotypcal views and the problems in investigating the subject—including complications in how to determine and motivate whether there is a difference in women’s and men’

The case of Vietnam, represented by the different development paths between Tonkin and Cochin-China, shows the complexity of analysis of the impact of colonialism. Population density was not the organizing principle behind the settlement of French colonialists. Nor did it significantly determine the level of extraction as expected by AJR’s theory. On the contrary, we show that the presence of seve

A new U–Pb baddeleyite age of 1970 ± 3 Ma for the Unoi dolerite sill of the Onega structure of Karelia craton matches other 1.98–1.95 Ga units across the Kola craton (Pechenga) and widely separated parts of the Karelian craton, including the Lake Onega sill area and a extensive NW-trending dolerite dyke swarm. Herein these coeval units are combined into the Pechenga–Onega Large Igneous Province. T

Purpose - The purpose of this paper is to carry out a numerical investigation to study forced convection for a tube with fins on the inner and outer surfaces with water as the base fluid and adding particles of CuO to have a nanofluid. Design/methodology/approach - Three geometries are designed by using Solid Works and the number of inside fins is 20 with height 6 mm and thickness 1mm. The number

Ett antal superkontinenter har existerat under jordens 4.6 Ga ( miljarder år gamla ) historia. Utav dessa är superkontinenten Pangea, som betyder ”allt land”, den senaste och mest väldefinierade. Bildning och uppsprickning av superkontinenter drivs av plattektoniska processer som i sin tur beror på strömningar ( konvektion ) i jordens mantel. Förutom dessa processer så anses numera mantelplymer haEarth history is punctuated by a series of events of supercontinent amalgamation and break-up. Fragments of old continents display rifted margins and orogenic sutures that testify their involvement in supercontinent cycles. Periods of break-up are associated with widespread magmatism due to extensional thinning and rifting of the lithosphere and in some instances the arrival of mantle plumes. Mant

Aim: To explore improvement facilitators' experiences of handling their commission to implement evidence-based practice in elderly care for frail older persons. Background: Improvement facilitators were put in place across Sweden in a time-limited project by the government, with one part of the project being to evaluate the model before establishing this facilitation of evidence-based practice in