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Animal classification is primarily based on morphological characters, even though these may not be the first to diverge during speciation. In many cases, closely related taxa are actually difficult to distinguish based on morphological characters alone, especially when there is no substantial niche separation. As a consequence, the diversity of certain groups is likely to be underestimated. Lepido
Early caregiving is one of the strongest influences on children's development, and among the most significant modifiable environmental factor. The aim of this study was to explore the association between quality of caregiver-infant interactions and neurodevelopment of infants living in banana-growing communities in rural Costa Rica characterized as having environmental toxic exposures. Home visits
BACKGROUND: Oxidative stress may be involved in the aetiology of inflammatory bowel disease and whether dietary polyphenols, which possess antioxidants properties, prevent its development is unknown.METHODS: A total of 401,326 men and women aged 20 to 80 years from 8 countries were recruited between 1991 and 1998 and at baseline completed validated food frequency questionnaires. Dietary polyphenol
Flowers and fruits of Zlivifructus microtriasseris, originally described as Caryanthus microtriasseris from the late Turonian to Santonian of the South Bohemian Basins and the late Coniacian to early Santonian of the North Sudetic Basin, are reinterpreted here. Zlivifructus microtriasseris is represented by small, flat fruits, round in outline with persistent perianths, which are fused basally, fo
Glucagon-like peptide-1 (GLP-1) is released from intestinal L-cells in response to nutrient ingestion. It is currently under therapeutic evaluation because it enhances insulin secretion in type 2 diabetes. Previous studies using the GLP-1 secreting cell line GLUTag have shown that the cells are electrically active, and that the action potential frequency is regulated by nutrients. In this study we
Research Question/Issue: This paper examines the impact of changes in board independence on the market valuation of Swedish firms. I exploit an exogenous change to the rules of corporate governance in 2005, which requires large firms to have majority independent boards, as a quasi‐experimental setting.Research Findings/Insights: I use a regression discontinuity design and a difference‐in‐differenc
Following electroconvulsive treatment (ECT) of rabbits, preprotachykinin-A (PPT-A) mRNA was detected by Southern blot analysis of polymerase chain reaction (PCR)-amplified products in the cerebrospinal fluid (CSF) and aqueous humor of the eye. In contrast, no PPT-A mRNA could be detected in samples from untreated animals. In addition, several neuropeptides (substance P, neuropeptide Y, cholecystok
We have compared the effects of vasoactive intestinal peptide (VIP) and of the VIP-related peptides pituitary adenylate cyclase activating peptide (PACAP) 1-27 and 1-38, helodermin, helospectin I and helospectin II, on the electrically evoked twitches in the isolated vas deferens of the rat. While VIP was virtually without effect, PACAP 1-38 suppressed the electrically evoked twitches effectively
Preischemic hyperglycemia or superimposed hypercapnia exaggerates brain damage caused by transient forebrain ischemia. Because high regional levels of brain-derived neurotrophic factor (BDNF) protein correlate with resistance to ischemic damage, we studied the expression of BDNF mRNA using in sire hybridization in rats subjected to 10 minutes of forebrain ischemia under normoglycemic, hyperglycemi
Professor emeritus Contact details Email: lennart [dot] piculell [at] chem [dot] lu [dot] se Phone: +46 46 222 95 18Organisation Physical Chemistry Service point: 1 WebpageLennart Piculells profile in Lund University research portalResearch projectsSoluble complex salts of surfactant ions and polymeric counterions: Composite macromolecular self-assembly Polymer-surfactant interaction at liquid int
https://www.physchem.lu.se/lennart-piculell - 2026-06-30
Relationships between subjective perception of indoor air quality, building characteristics, indoor exposures, and personal factors were studied in 225 female Swedish hospital workers. The prevalence of weekly complaints to do with dry air was 87% for air dryness, and 36% for static electricity. Such com plaints were more common in new and well ventilated buildings. The sensa tion of air dryness w
Popular Abstract in Swedish Fylogeografiska analyser omfattar studier av släktskap mellan geografiskt skilda individer och populationer i en art. Målsättningen är att hitta genetiska spår av storskaliga biogeografiska händelser och historiska evolutionära processer. Min avhandling inbegriper fylogeografiska studier av mellansork (Microtus oeconomus), vars utbredningsområde omfattar stora deThe root vole (Microtus oeconomus) is a rodent with Holarctic distribution. In fact, it is the only Microtus vole found in both Eurasia and North America. Phylogeographic analyses of the root vole from across its distribution range were performed using mitochondrial and Y chromosome DNA sequences. Mitochondrial cytochrome b gene data demonstrate that the root vole is divided i
Purpose The research presented is the initial part of a project with the aim of increasing the use of end-user requirement through out the construction process. This initial part maps how Swedish real estate companies manage end-user requirements and evaluate the outcome. Methodological approach The focus of the study was on methods for capturing and managing end-user requirements and for measur
We analyze the clustering of scatterers in mobile radio channels, i.e, the fact that scatterers are usually not located uniformly in the whole coverage area, but tend to occur in clusters. While this has been recognized for some time, a realistic model for this phenomenon has been lacking up to now. We first analyze measurements to extract the distribution of the number of observed clusters. We th
Popular Abstract in Swedish Främmande arter är sådana som introducerats med människans hjälp till områden de inte kan sprida sig till på egen hand. Om en introducerad art är framgångsrik och lyckas etablera och sprida sig i mottagarregionen kan den påverka de inhemska arterna genom predation, konkurrens, hybridisering, parasitism och förändring av habitat. Eftersom arterna i mottagarområdet inte hWe live in a globalised world where people and goods travel large distances. Various species are brought along on these journeys, intentionally or as hitchhikers. Some of these species establish populations in regions to which they could not have spread without human assistance, and where they are considered to be non indigenous species (NIS). These species can affect the ecosystem in the recipien
