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Showing 13 to 24 of 269 entries
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Charge-remote fragmentation characteristics of functionalized alkanes in high-energy collision-induced dissociation.

Rapid communications in mass spectrometry : RCM

Denekamp C, Van Den Heuvel H, Voinov VG, Claeys M, Seto C, Grossert JS, Waddell DS, Curtis JM, Boyd RK.
PMID: 10861984
Rapid Commun Mass Spectrom. 2000;14(12):1035-43. doi: 10.1002/1097-0231(20000630)14:12<1035::AID-RCM986>3.0.CO;2-4.

In this study we report on high-energy, collision-induced dissociation processes leading to charge-remote fragmentations, using three alkyl cations, namely n-hexadecylpyridinium, n-hexadecyltriphenylphosphonium and n-hexadecyltriethylammonium, each with and without (2)H(2)-labelling at the C(9) position of the hexadecyl chain. The characteristic patterns...

Measurement of thermally induced vibrations of microelectronic devices by use of a heterodyne electronic speckle pattern interferometry imaging technique.

Applied optics

Grauby S, Dilhaire S, Jorez S, Lopez LD, Rampnoux JM, Claeys W.
PMID: 12683753
Appl Opt. 2003 Apr 01;42(10):1763-8. doi: 10.1364/ao.42.001763.

An imaging technique to measure modulated surface displacements on microelectronic devices is presented. A device is supplied by a sinusoidal current that creates a modulated variation of temperature. To measure the induced normal surface displacement, we use an electronic...

Correlation between maternal and infant HIV infection and low birth weight: a study in Mombasa, Kenya.

Journal of obstetrics and gynaecology : the journal of the Institute of Obstetrics and Gynaecology

Mwanyumba F, Claeys P, Gaillard P, Verhofstede C, Chohan V, Mandaliya K, Ndinya-Achola J, Bwayo J, Temmerman M.
PMID: 12521907
J Obstet Gynaecol. 2001 Jan;21(1):27-31. doi: 10.1080/01443610020022078.

This article aimed to examine the association between maternal and infant HIV infection and low birth weight (LBW

Coeval 40Ar/39Ar Ages of 65.0 Million Years Ago from Chicxulub Crater Melt Rock and Cretaceous-Tertiary Boundary Tektites.

Science (New York, N.Y.)

Swisher CC, Grajales-Nishimura JM, Montanari A, Margolis SV, Claeys P, Alvarez W, Renne P, Cedillo-Pardoa E, Maurrasse FJ, Curtis GH, Smit J, McWilliams MO.
PMID: 17789640
Science. 1992 Aug 14;257(5072):954-8. doi: 10.1126/science.257.5072.954.

(40)Ar/(39)Ar dating of drill core samples of a glassy melt rock recovered from beneath a massive impact breccia contained within the 180-kilometer subsurface Chicxulub crater in Yucatán, Mexico, has yielded well-behaved incremental heating spectra with a mean plateau age...

Antivirally Active Gallotannins from Spondias mombin.

Planta medica

Corthout J, Pieters L, Claeys M, Berghe DV, Vlietinck AJ.
PMID: 17265366
Planta Med. 1988 Dec;54(6):573. doi: 10.1055/s-2006-962579.

No abstract available.

Microtektites and mass extinctions: evidence for a late devonian asteroid impact.

Science (New York, N.Y.)

Claeys P, Casier JG, Margolis SV.
PMID: 17840279
Science. 1992 Aug 21;257(5073):1102-4. doi: 10.1126/science.257.5073.1102.

Glass spherules, similar to microtektites, have been found near the Frasnian-Famennian boundary (F/F) (Upper Devonian) at Senzeilles, Belgium, contemporaneous with one of the largest marine mass extinctions of the Phanerozoic. These spherules exhibit a wide range of compositions and...

Guaianolide Glucosides from Elephantopus scaber.

Planta medica

Hisham A, Pieters I, Claeys M, Dommisse R, Berghe DV, Vlietinck A.
PMID: 17226508
Planta Med. 1992 Oct;58(5):474-5. doi: 10.1055/s-2006-961521.

No abstract available.

Emplacement of cretaceous-tertiary boundary shocked quartz from chicxulub crater.

Science (New York, N.Y.)

Alvarez W, Claeys P, Kieffer SW.
PMID: 17807728
Science. 1995 Aug 18;269(5226):930-5. doi: 10.1126/science.269.5226.930.

Observations on shocked quartz in Cretaceous-Tertiary (K-T) boundary sediments compellingly tied to Chicxulub crater raise three problems. First, in North America shocked quartz occurs above the main K-T ejecta layer. Second, shocked quartz is more abundant west than east...

Synthesis of 1,3-dioxo-hexahydropyrido[1,2-c][1,3]diazepine carboxylates, a new bicyclic skeleton formed by ring expansion-RCM methodology.

Chemical communications (Cambridge, England)

Dieltiens N, Claeys DD, Allaert B, Verpoort F, Stevens CV.
PMID: 16136256
Chem Commun (Camb). 2005 Sep 21;(35):4477-8. doi: 10.1039/b508663a. Epub 2005 Aug 04.

A short and elegant synthetic pathway was developed for the synthesis of 1,3-dioxo-hexahydropyrido[1,2-c][1,3]diazepine carboxylates, a new 1,3-diazepan-2,4-dione containing bicyclic moiety, starting from pyroglutamate esters.

Ultrastructure of sperm cells in the female gonoduct of Xiphinema.

Tissue & cell

Van De Velde MC, Coomans A, Van Ranst L, De W Kruger JC, Claeys M.
PMID: 18621191
Tissue Cell. 1991;23(6):881-91. doi: 10.1016/0040-8166(91)90037-t.

The ultrastructure of the sperm cells in the female gonoduct of the nematodes Xiphinema theresiae and X. pinoides is described. The nucleus of the sperm cells is composed of several electron-dense clumps of chromatin that is not surrounded by...

Spectrally selective reflector surfaces for heat reduction in concentrator solar cells: modeling and applications of TiO₂:Nb-based thin films.

Applied optics

Maghanga CM, Niklasson GA, Granqvist CG, Mwamburi M.
PMID: 21743532
Appl Opt. 2011 Jul 01;50(19):3296-302. doi: 10.1364/AO.50.003296.

The energy conversion efficiency of a conventional pn junction solar cell decreases as the temperature increases, and this may eventually lead to failures in the photovoltaic system, especially if it uses concentrated solar radiation. In this work, we show...

Phytochemical- and Pharmacological Investigation of the Biologically Active Fraction from the Flowers of Vernonia amygdalina.

Planta medica

Rwangabo PC, Laekeman G, Claeys M, Totté J, Pieters L, Berghe DV, Herman A, Vlietinck AJ.
PMID: 17345505
Planta Med. 1986 Dec;(6):547-8. doi: 10.1055/s-2007-969351.

No abstract available.

Showing 13 to 24 of 269 entries