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Iron in Haem Biosynthesis. Structural Studies of Ferrochelatase and Frataxin.

Popular Abstract in Swedish Järn är ett metalliskt grundämne som tillhör övergångselementen i det periodiska systemet. Den kemiska beteckningen är Fe (av det latinska ordet ferrum). Järn har visat sig vara ett väldigt viktigt ämne för i princip allt liv på vår planet. Främst finns det bundet till olika proteiner i form av järnsvavelkluster och hem. Hem är en liten molekyl som finns i de allra fleFerrochelatase catalyses the synthesis of heme by inserting Fe(II) into protoporphyrin IX. The structure of ferrochelatase from yeast has been determined (2.4 Å). The structure is homodimeric with each of the monomer made up of two Rossmann type domains with an active-site cleft between them. Metal binding studies with Co(II) and Cd(II) ions reveal the metal binding residues as being the His-Glu

How the Holy Cross was Found: From Event to Medieval Legend

Studies the origin of the Inventio Crucis legend: the historical events behind it as well as its textual sources and antecedents. A literary interpretation of the text is then attempted, showing that the legend is influenced by Jewish traditions and adversus Iudaeos treatises. Finally, the liturgical texts used to celebrate Inventio Crucis in the Middle Ages are surveyed. Three versions of the Lat

A MEC network method based on the BH curve linearisation: study of a claw-pole machine

The magnetic equivalent circuit network method has been used to analyse the flux distribution and torque response of a novel electrically magnetized synchronous machine without slip-rings. Non-linearities have been included in the model using an iterative approach based on the linearisation of the BH curve, which proves to be very fast. Results at load and no load indicate that the leakage can be

The Teddy Bear in Psychology : A prospective study with focus on children´s use of transitional objects.

Popular Abstract in Swedish Winnicott definierade och införde begreppen övergångsobjekt (ÖO) och övergångsfenomen (ÖF) vid ett möte i brittiska psykoanalytiska föreningen i maj 1951. Detta kopplades till ett tänkande, som gällde utvecklingen av barnets relaterande från en från början alltigenom subjektiv upplevelsevärld till en värld med ”verkliga” relationer - och talade om ”the intermediate areaThe central issue of the dissertation is the place and meaning of the concepts transitional object (TO) and transitional phenomenon (TP) as defined by Winnicott, in a normal psychological context. A group of children were followed from age 8 months to 6 years. A prevalence study was carried out by interviewing parents in connection with the child's (n=147) routine check-ups at the Child Health Cen

Strategy for Monitoring Organic Pollutants in Waste Water with Focus on Improved Sample Preparation

Strategy and methodology is presented for the analysis of organic pollutants, with the purpose of evaluating treatment procedures for landfill leachate. Today, many investigations of treatment procedures are focusing on the measurement of water quality parameters such as chemical and biochemical oxygen demand, (COD and BOD), and total organic carbon, (TOC) when assessing the organic compounds in w

CFD in design and development of heat exchangers

This paper gives a brief summary of CFD (computational fluid dynamics) methods and turbulence modeling for applications in the design, research and development of heat exchangers. Some examples are shown to demonstrate how CFD methods can be used as engineering tools. Nevertheless, limitations and shortcomings as well as need for further research are highlighted. Copyright

Load-Carrying Capacity of Damaged Steel Columns with Channel Sections

The influence of damage on the load-carrying capacity of thin-walled steel columns with channel sections is investigated. The axial load-carrying capacity is evaluated for different profiles, and different damage magnitudes are dealt with. The profiles selected for the analysis are commonly used as upright members in rack and shelving systems in industry. The type of damage corresponds primarily t

Older People,s Involvement in the Development of a social assistive Robot

The introduction of social assistive robots is a promising approach to enable a growing number of elderly people to continue to live in their own homes as long as possible. Older people are often an excluded group in product development; however this age group is the fastest growing segment in most developed societies. We present a participatory design approach as a methodology to create a dialogu

Reduplication with fixed tone pattern in Kammui

In this paper we show that speakers of both tonal and non-tonal dialects of Kammu use a fixed tone pattern high–low for intensifying reduplication of adjectives, and also that speakers of the tonal dialect retain the lexical tones (high or low) while applying this fixed tone pattern.

Visualisering av ögonrörelser som stöd för motivation, metakognition och lärande

Bidraget presenterar ett nytt pedagogiskt verktyg (EyeLearn) som baseras på ögonrörelsemätningsmetoden och används som stöd för motivation, metakognition och lärande. Genom visualiseringar av ögonrörelser kan man följa problemlösningsprocessen, ge stöd till lågpresterande elever, förbättra elevers metakognitiva förmågor och studieteknik, plocka fram exempel på framgångsrika och mindre framgångsrik

Trigeneration: Thermodynamic performance and cold expander aerodynamic design in humid air turbines

Improving electrical efficiency has been proposed as the most convenient means of reducing, e.g. CO2 emission from power plants. Increasing fuel utilization through combined heat and power generation is another useful measure for emission reduction. Trigeneration technology for the production of heat, power and cooling is an interesting alternative for further improvement of fuel utilization. Prev