This paper investigates vowel elision and morpheme deletion in Embosi (Bantu C25), an under-resourced language spoken in the Republic of Congo. We propose that the observed morpheme deletion is morphological, and that vowel elision is phonological. The study focuses on vowel elision that occurs across word boundaries between the contact of long/short vowels (i.e. CV[long] # V[short].CV), and be...

A new short strategy to prepare the spiroketal fragment of calyculins is presented. A novel Seyferth–Gilbert type homologation of hindered lactols to the corresponding alkynes has been achieved for the first time. The spirocyclization was achieved efficiently via a DIHMA (double intramolecular hetero-Michael addition) process of this hindered ynone. The spirocyclization rate is not dependent on...

Vitamin D3 (1) is metabolized by various cytochrome P450 (CYP) enzymes, resulting in the formation of diverse metabolites. Among them, 4α,25-dihydroxyvitamin (6a) and 4β,25-dihydroxyvitamin (6b) are both produced from 25-hydroxyvitamin (2) CYP3A4. However, 6b detectable serum, whereas 6a not. We hypothesized that reason for this a difference susceptibility to CYP24A1-mediated metabolism. Here, ...

The research objective of this paper is to investigate the effect different types cement and climatic conditions on durability reinforced concrete structures understand address issues erosion. used were CEM I 42.5N, II/A-M (P-LL) 42.5N II/B-M (W-P-LL) 32.5N. Mixtures three mortars six concretes prepared with these cement. Cement produced according European standard EN 196-1. Concrete mixtures s...

CYP24A1 is a mitochondrial cytochrome P450 (CYP) that catabolizes 1α,25-dihydroxyvitamin D(3) (1α,25-(OH)(2)D(3)) to different products: calcitroic acid or 1α,25-(OH)(2)D(3)-26,23-lactone via multistep pathways commencing with C24 and C23 hydroxylation, respectively. Despite the ability of CYP24A1 to catabolize a wide range of 25-hydroxylated analogs including 25-hydroxyvitamin D(3), the enzyme...

This article studies the migration of MOAH from hot melt adhesives used in multilayer laminates into food simulants. First, initial concentration a group compounds selected as markers several was determined by headspace solid phase microextraction coupled to gas chromatography mass spectrometry (HS-SPME-GC-MS), using previously optimised method. Then, fraction and studied. The analysed with fla...

The resonant cross relaxation processes between Yb3+ and Er3+ ions in calcium alumino-silicate glasses have been quantified under selective excitation. infrared emission spectra, measured steady state conditions (CW excitation to the 4I9/2 erbium level), allowed obtain an experimental relationship linking transfer (Yb3+ → Er3+) back (Er3+ Yb3+) parameters. These measurements combined with dynam...

The major components of the sex pheromone of Dioryctria abietivorella (Groté) (Lepidoptera: Pyralidae) were recently identified as (9 Z ,11 E )-tetradecadien-1-yl acetate (9 Z ,11 E -14:Ac) and a polyunsaturated, long-chain hydrocarbon (3 Z ,6 Z ,9 Z ,12 Z ,15 Z )-pentacosapentaene (C25 pentaene). The optimal ratio of these components and the role of potential minor components were not fully de...