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The DNA ploidy level of 673 accessions belonging to 238 species of Hieracium have been analyzed by flow cytometry. 222 of the species were of Scandinavian origin as members of the exclusively apomictic H. sectt. Bifida, Hieracium, Oreadea, Tridentata and Vulgata. For the overwhelming majority of the species, the ploidy level (or chromosme number) has never been investigated before. Approximately 5

Atmospheric aerosol particles serving as cloud condensation nuclei (CCN) are key elements of the hydrological cycle and climate. We have measured and characterized CCN at water vapor supersaturations in the range of S=0.10-0.82% in pristine tropical rainforest air during the AMAZE-08 campaign in central Amazonia. The effective hygroscopicity parameters describing the influence of chemical composit

Popular Abstract in Swedish Inom området datorgrafik undersöker man hur virtuella scener kan omvandlas till verklighetstrogna bilder. För interaktiva miljöer, som exempelvis datorspel, måste en ny bild vara genererad och klar att visas på skärmen mellan 30-60 gånger i sekunden för att upplevelsen ska kännas responsiv och för att rörelser ska flyta på ett naturligt sätt. För att datorn ska hinna meThe field of computer graphics refers to the use of computers to generate realistic-looking images from virtual scenes. Graphics processing units use an algorithm known as rasterization to compute images of scenes viewed from a virtual camera. The commonly used pinhole camera model does not account for the imperfections that stem from the physical limitations in real-world cameras. This includes,

Pay policy programme for Lund University.Word Page 1 of 8 Dnr I F 9 5307/1999 Pay policy programme for Lund University approved by the University Board on 7 April 2000 The basic aim of the pay policy is to help the University in achieving its targets. Motivated, committed and knowledgeable employees are a necessary prerequisite for high quality in the University’s activities. Lund University shall

https://www.staff.lu.se/sites/staff.lu.se/files/2023-10/pay-policy-programme-for-Lund-University.pdf - 2026-05-06

Abstract This dissertation examines the educational situation from a social psychological perspective. The study is based on an empirical material from two school classes at a Swedish high school. The data have been collected through video documentation and direct observation. A number of brief episodes have been transcribed in detail, and are interpreted and analyzed in the light of interactioni

Popular Abstract in Swedish Stjärnors radialhastigheter har i mer än ett sekel haft betydelse för studiet av Vintergatans och stjärnhoparnas kinematik. Radialhastigheten är den hastighet en stjärna, eller ett annat objekt, har längs synlinjen från en given observatör. Hittills har radialhastigheter bestämts med hjälp av spektroskopi, genom att observera spektrallinjer vars vilovåglängder är kända.This work demonstrates the determination of absolute stellar radial velocities from geometrical principles, i.e. using astrometry. Such `astrometric radial velocities' are obtained independently of spectroscopic information. While spectroscopic radial velocities are affected by line shifts from astrophysical processes on the stellar surfaces, by gravitational redshift and various other effects, as

Popular Abstract in Swedish Potatis är ett av våra viktigaste baslivsmedel, men erbjuder trots det stor variation. Traditionella recept varvas med nya innovationer i hushåll och restauranger, och inom livsmedelsindustrin processas potatisen till en rad olika produkter. Från traditionell kokt potatis med sås inom husmanskosten har våra matvanor förändrats radikalt. Ökade krav på snabb och enkel tilThe potato is one of our most important food crops, being sold in its natural state or processed into a wide range of products. Starch, by far the most abundant component in the tuber, is greatly affected by heat processing. Therefore it is logical to study starch thermal properties within the tuber tissue, although most previous studies have focused on starch-water model systems. One of the main

In selecting cows for higher milk yields and milk quality, it is important to understand how these traits are affected by the bovine genome. The major milk proteins exhibit genetic polymorphism and these genetic variants can serve as markers for milk composition, milk production traits, and technological properties of milk. The aim of this study was to investigate the relationships between casein

Magnetotactic bacteria (MTB) are known to biosynthesise single-domain magnetite (Fe3O4) for geomagnetic navigation and their relict magnetosomes (called magnetofossils) can control the magnetic properties of lake and marine sediments. Magnetotactic bacteria also produce greigite (Fe3S4) magnetosomes but, compared to those made of magnetite, relatively little is known about the sedimentary environm

Partial lesions of the nigrostriatal dopamine system have been investigated with respect to their ability to induce consistent long-lasting deficits in movement initiation and skilled forelimb use. In eight different lesion groups 6-hydroxydopamine (6-OHDA) was injected at one, two, three, or four sites into the lateral sector of the right striatum, in a total dose of 20-30 microgram. Impairments

Popular Abstract in Swedish Tvärsektoriella nätverk mellan myndigheter, näringsliv och olika intressegrupper har tilldelats en allt större betydelse, då det varit en vanlig uppfattning att en hållbar utveckling bäst skapas genom ett gemensamt ansvar. Uppfattningarna om resultaten av dessa initiativ uppvisar dock spektakulära skillnader: från att framstå som oslagbara lösningar på de utmaningar soThe importance of cross-sectoral collaborative initiatives, that is partnerships of governments, civil society and the private sector, was elevated due to the belief that the issues of SD are a collective responsibility of all societal actors. The assessment of these initiatives is ranging dramatically; from giving them a status of an unbeatable solution for the SD challenges, to blaming them for

This thesis consists of theoretical studies of the evolutionary consequences of environmental change in ecological communities. Paper I and II are concerned with the origin of diversity, i.e. how a single lineage can split into two, under the influence of selection induced by competitive interactions (evolutionary branching). In paper I we find that environmental fluctuations may affect the likeli

The fourth generation broadband (4GBB) concept aims for ubiquitous and high-speed data communication over the existing twisted copper pairs between the last distribution point and the customer premise equipment. Although it saves deployment cost for the last-mile communication, using the existing copper infrastructure makes the system vulnerable to crosstalk due to electro-magnetic coupling from t

Background: The lack of access to essential surgical care in low-income countries is aggravated by emigration of locally-trained surgical specialists to more affluent regions. Yet, the global diaspora of surgeons, obstetricians, and anesthesiologists from low-income and middle-income countries has never been fully described and compared with those who have remained in their country of origin. It i

Dispersal is important for determining both species ecological processes, such as population viability, and its evolutionary processes, like gene flow and local adaptation. Yet obtaining accurate estimates in the wild through direct observation can be challenging or even impossible, particularly over large spatial and temporal scales. Genotyping many individuals from wild populations can provide d

Inom nuklearmedicinen utnyttjas radioaktiva läkemedel och strålningen som sänds ut från dessa för att diagnosticera och behandla ett flertal olika sjukdomar. Det radioaktiva läkemedlet ges ofta till patienten som en intravenös injektion, och läkemedlets egenskaper i kombination med patientens fysiologi och eventuella sjukdom avgör hur läkemedlet sedan fördelas, omsätts och utsöndras från kroppen. Many nuclear medicine investigations rely on gamma-camera imaging to study and quantify the distribution of radiopharmaceuticals or radionuclides in the patient as a function of time. This is typically used for diagnostic studies of physiological functions or for calculation of absorbed doses following radionuclide therapy. In this work, computational patient models (phantoms) have been developed

Undersökning av Hsp21 med korslänknings-masspektrometriMänniskans kropp består av ungefär 30 trillioner celler och varje cell innehåller omkring 100 000 proteiner. Föreställ dig om kroppen vore jordklotet, varje vävnad ett land och varje cell en stad. Varje stad vore då konstant som Paris i rusningstrafiken. Trafiken vore helt galen hela tiden och väldigt känslig för även den minsta störning. CellSmall heat shock proteins (sHsps) are found in all organisms and evolved early in the history of life, prior to the divergence of the three domains of life (Archaea, Bacteria, and Eukarya). Their malfunction is connected to several different diseases in humans, such as Alzheimer’s and Parkinson’s disease. sHsps are especially abundant in plants, where most are highly upregulated as the first line

An approach to reduce CO2 emissions while simultaneously keeping the soot emissions down from compression ignition (CI) engines is to blend in short chained oxygenates into the fuel. In this work, two oxygenated fuel blends consisting of diesel, gasoline and ethanol (EtOH) in the ratio of 68:17:15 and 58:14:30 have been utilized and studied in a single cylinder light duty (LD) CI engine in terms o

The Amazon Basin is a unique region to study atmospheric aerosols, given their relevance for the regional hydrological cycle and the large uncertainty of their sources. Multi-year datasets are crucial when contrasting periods of natural conditions and periods influenced by anthropogenic emissions. In the wet season, biogenic sources and processes prevail, and the Amazonian atmospheric composition

The thesis investigates elite children’s lives in China between 500 and 1000 ACE within the framework of historical anthropology. Based on ‘anomaly accounts’ (collected in the Taiping guangji), medical manuscripts, family instructions, ‘children’s books’, tomb inscriptions, official histories, law and tax code, and poetry, this thesis provides a general definition of childhood and children in medi