DSM

About: DSM is a company organization based out in Heerlen, Netherlands. It is known for research contribution in the topics: Galaxy & Catalysis. The organization has 11183 authors who have published 14095 publications receiving 493443 citations. The organization is also known as: Royal DSM.

Radiation curable acrylic-acid esters containing hydroxyalkylamide groups

Abstract: The invention relates to a radiation curable compound such as (I) which is a mono or multi valent carboxylic ester of a compound containing a hydroxyalkylamidegroup and a hydroxygroup in which the carboxylic ester is derived from an α,β-ethylenically unsaturated carboxylic acid. A coating composition comprising this compound has a high rate of polymerisation and shows the desired chemical and mechanical properties.

Topical use of steviol or derivatives in hair care

Abstract: The present invention relates to the use of steviol and/or isosteviol, or a salt, ester, a diester, or an ether thereof as depicted in formula (I), formula (I): R1 wherein R1 is hydrogen (H) or a saturated, straight or branched C1-C8 alkyl group non substituted or substituted with up to 3 hydroxyl-, alkoxy-, amino-, alkylamino- or dialkylamino- groups, R2 is independently a saturated, straight or branched C1-C8 alkyl group, -O-C1-C8 alkyl group, -OH group, a -O-C(O)-C1-C8 alkyl, or, -COO(C1-C8 alkyl) group, R3 is independently CH2, O, or CH-(C1-C7 alkyl), wherein the enhancement of the appearance of hair is selected from the group consisting of: restoring hair color and delaying the onset of greyness in hair, lessening hair loss, restoring hair growth after the onset of baldness has occurred, increasing the thickness of hair, counteracting age-associated hair thinning, preventing premature hair loss, or delaying the onset or severity of age-associated hair loss and thinning, maintaining of the natural hair colour, increasing hair shininess, glossiness or volume. In particular, the compound is applied topically.

Microstructure and Properties of a Three-Layer Nuclear Fuel Cladding Prototype Containing Erbium as a Neutronic Burnable Poison

Abstract: To increase cycle length and/or fuel burnup, several theoretical and experimental studies have been performed at CEA. Among them, prospective neutronic calculations have shown that the addition of a few weight percents of erbium into the cladding materials could be a promising alternative to the introduction of the neutronic poison directly into the nuclear fuel pellets. Thus, fabrication of homogeneous Zr-Er alloys has been assessed, at least up to 10 wt. % of erbium and, based on the as-received mechanical properties, an optimum erbium concentration ranging from 3 to 6 wt. % has been derived. However, because of the high-oxygen thermodynamic affinity of erbium, thermal treatments have to be controlled during the fabrication route to limit Er2O3 precipitation and coarsening, which may have detrimental effects on the ductility/toughness of Zr-Er alloys. In parallel, to get more fundamental insights into the underlying phase diagrams, thermodynamic studies have been devoted to experimental assessment and modeling of the Zr-Er-(H-O) system. Because of the detrimental influence of erbium on the corrosion resistance, a three-layer sandwich clad prototype has been developed using corrosion-resistant inner/outer Zr-1Nb layers to protect the intermediate Zr-Er layer from direct water exposure. Compared to a reference Zr-1Nb(O) alloy that has been subjected to the same fabrication route, the three-layer clad prototype shows limited decrease in ductility because of pre-hydriding or after high-temperature steam oxidation e.g., in the case of a loss-of-coolant accident). Moreover, the studies performed so far have shown a spectacular hydride trapping capacity of the intermediate Zr-Er layer both for hydrogen coming from nominal outer corrosion or because of massive secondary hydriding in case of the direct access of water to the Zr-Er intermediate layer. Using μ-ERDA (elastic recoil detection analysis) measurements, detailed studies of the hydrogen spatial redistribution upon thermal cycling has been done. A simple model has been successfully used to characterize the cooling rate influence on the through-wall clad thickness partitioning of hydrogen/hydrides between the three layers, after cooling from a temperature corresponding to full dissolution of hydrides

Microextraction of Reseda luteola-Dyed Wool and Qualitative Analysis of Its Flavones by UHPLC-UV, NMR and MS

Abstract: Detailed knowledge on natural dyes is important for agronomy and quality control as well as the fastness, stability, and analysis of dyed textiles. Weld (Reseda luteola L.), which is a source of flavone-based yellow dye, is the focus of this study. One aim was to reduce the required amount of dyed textile to ≤50 μg for a successful chromatographic analysis. The second aim was to unambiguously confirm the identity of all weld flavones. By carrying out the extraction of 50 μg dyed wool with 25 μL of solvent and analysis by reversed-phase UHPLC at 345 nm, reproducible chromatographic fingerprints could be obtained with good signal to noise ratios. Ten baseline separated peaks with relative areas ≥1% were separated in 6 min. Through repeated polyamide column chromatography and prepHPLC, the compounds corresponding with the fingerprint peaks were purified from dried weld. Each was unequivocally identified, including the position and configuration of attached sugars, by means of 1D and 2D NMR and high-resolution MS. Apigenin-4′-O-glucoside and luteolin-4′-O-glucoside were additionally identified as two trace flavones co-eluting with other flavone glucosides, the former for the first time in weld. The microextraction might be extended to other used dye plants, thus reducing the required amount of precious historical textiles.

Sigma observations of the bursting pulsar gro j1744(28

Abstract: We present the results of the GRANAT/SIGMA hard X-/soft γ-ray long-term monitoring of the Galactic center (GC) region concerning the source GRO J1744-28, discovered on 1995 December 2 by CGRO/BATSE. SIGMA observed the region containing the source in 14 opportunities between 1990 and 1997. In two of these observing sessions, corresponding to 1996 March and 1997 March, GRO J1744-28 was detected with a confidence level greater than 5 σ in the 35-75 keV energy band without detection in the 75-150 keV energy band. For the other sessions, upper limits of the flux are indicated. The particular imaging capabilities of the SIGMA telescope allow us to identify, specifically, the source position in the very crowded GC region, giving us a mean flux of (73.1 ± 5.5) × 10-11 and (44.7 ± 6.4) × 10-11 ergs cm-2 s-1 in the 35-75 keV energy band, for the 1996 March and 1997 March observing sessions, respectively. Combining the 1997 March SIGMA and BATSE observations, we found evidence pointing to the type II nature of the source bursts for this period. For the same observing campaigns, spectra were obtained in the 35 to 150 keV energy band. The best fit corresponds to an optically thin thermal Bremsstrahlung with F50keV = 3.6(±0.6) × 10-4 photons cm-2 s-1 keV-1 and kTBremss = 28 ± 7 keV for the first campaign, and F50keV = 2.3(±0.7) × 10-4 photons cm-2 s-1 keV-1 and kTBremss = 18 keV for the second. This kind of soft spectrum is typical of binary sources containing a neutron star as the compact object, in contrast to the harder spectra typical of systems containing a black hole candidate.