a taxonomic overview of the genus anticharis (scrophulariaceae) especially in namibia and angola is presented. three new species are described, viz. a. namibensis b. nord., a. kaokoensis b. nord. and a. angolensis b. nord. a key to the anticharis species of namibia and angola is presented. some aspects of phytogeography, molecular phylogeny and photosynthetic pathways (c3-c4) are briefly discus...

BACKGROUND Service-learning (SL) is a contested field of knowledge and issues of sustainability and scholarship have been raised about it. The South African Higher Education Quality Committee (HEQC) has provided policy documents to guide higher education institutions (HEIs) in the facilitation of SL institutionalisation in their academic programmes. An implementation framework was therefore nee...

Infants, children and adults are capable of implicitly extracting regularities from their environment through statistical learning (SL). SL is present from early infancy and found across tasks and modalities, raising questions about the domain generality of SL. However, little is known about its’ developmental trajectory: Is SL fully developed capacity in infancy, or does it improve with age, l...

This paper considers SL(n,R)-actions on Euclidean space fixing the origin. We show that all C-actions on R are linearizable. We give C∞-actions of SL(2,R) on R and of SL(3,R) on R which are not linearizable. We classify the C-actions of SL(n,R) on R. Finally, the paper concludes with a study of the linearizability of SL(n,Z)-actions. RÉSUMÉ. Dans cet article, on considère les actions de SL(n,R)...

Mycobacterium tuberculosis produces numerous exotic lipids that have been implicated as virulence determinants. One such glycolipid, Sulfolipid-1 (SL-1), consists of a trehalose-2-sulfate (T2S) core acylated with four lipid moieties. A diacylated intermediate in SL-1 biosynthesis, SL(1278), has been shown to activate the adaptive immune response in human patients. Although several proteins invo...

Studies were carried out to evaluate the impact of a high-fat dietary regimen on aortic wall thickness, peripheral blood leukocyte profile, and plasma cholesterol and triglyceride levels in the mast cell-deficient Sl/Sl(d) mouse. The results demonstrated that the mean aortic wall thickness of Sl/Sl(d) mice was significantly higher than their normal littermates, and were increased in both genoty...

Gariepy and colleagues (Gariepy CE, Williams SC, Richardson JA, Hammer RE, and Yanagisawa M. J Clin Invest 102: 1092-1101, 1998.) developed rescued spotting-lethal rats that carry a naturally occurring deletion of the endothelin (ET) type B receptor gene resulting in a lack of functional renal ETB receptor expression. It has been shown that rats homozygous (sl/sl) for the deletion have elevated...

Overnutrition during the suckling period (small litter, SL) results in the development of adult-onset obesity. Our aim was to investigate whether two levels of caloric restriction (CR) in the early postweaning period can reverse obese phenotype in SL rats. The normal litter (NL) had 12 pups/dam and SL had 3 male pups/dam from the postnatal day 3 until day 21. After weaning, rats consumed lab ch...

INTRODUCTION This study determined the amount and severity of EARR (external apical root resorption) after orthodontic treatment with self-ligating (SL) and conventional (Non-SL) brackets. Differences regarding rate of extraction cases, appointments and treatment time were evaluated. MATERIAL AND METHODS 213 patients with a mean age of 12.4 ± 2.2 years were evaluated retrospectively. The trea...

Spliced leader (SL) trans-splicing is a common mRNA processing mechanism in dinoflagellates, in which a 22-nt sequence is transferred from the 5'-end of a small noncoding RNA, the SL RNA, to the 5'-end of mRNA molecules. Although the SL RNA gene was shown initially to be organized as tandem repeats with transcripts of 50-60 nt, shorter than most of their counterparts in other organisms, other g...