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Showing 13 to 24 of 672 entries
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A concise enantioselective synthesis of the guaiane sesquiterpene (-)-oxyphyllol.

Beilstein journal of organic chemistry

Zahel M, Metz P.
PMID: 24204414
Beilstein J Org Chem. 2013 Oct 08;9:2028-32. doi: 10.3762/bjoc.9.239. eCollection 2013.

(-)-Oxyphyllol was prepared in only 4 steps from an epoxy enone that already served as an intermediate for the total synthesis of the anticancer guaiane (-)-englerin A. A regio- and diastereoselective Co(II)-catalyzed hydration of the olefin and a transannular...

Malignant pheochromocytoma secreting vasoactive intestinal peptide and response to sunitinib: a case report and literature review.

Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists

Leibowitz-Amit R, Lebowitz-Amit R, Mete O, Asa SL, Ezzat S, Joshua AM.
PMID: 24936559
Endocr Pract. 2014 Aug;20(8):e145-50. doi: 10.4158/EP14093.CR.

OBJECTIVE: Malignant pheochromocytoma is rare and may be sporadic or have a genetic basis. Vasoactive intestinal peptide (VIP)-secreting pheochromocytoma has rarely been described in the literature, and treatment remains challenging in the absence of well-controlled randomized trials. The hypoxia-inducible...

Highly Enantioselective Claisen Rearrangement of Imidates Derived from Primary Allyl Alcohols.

The Journal of organic chemistry

Metz P, Hungerhoff B.
PMID: 11671772
J Org Chem. 1997 Jun 27;62(13):4442-4448. doi: 10.1021/jo970123a.

A highly enantioselective and diastereoselective Claisen rearrangement of N-arylimidates derived from an axially chiral binaphthylamine auxiliary is reported. Upon deprotonation of the imidates with lithium diethylamide, the resultant azaenolates rearrange at 0 degrees C to give anti alpha,beta-disubstituted, gamma,delta-unsaturated...

Oxygen Binding, Activation, and Reduction to Water by Copper Proteins.

Angewandte Chemie (International ed. in English)

Solomon EI, Chen P, Metz M, Lee SK, Palmer AE.
PMID: 12404359
Angew Chem Int Ed Engl. 2001 Dec 17;40(24):4570-4590. doi: 10.1002/1521-3773(20011217)40:24<4570::aid-anie4570>3.0.co;2-4.

Copper active sites play a major role in biological and abiological dioxygen activation. Oxygen intermediates have been studied in detail for the proteins and enzymes involved in reversible O(2) binding (hemocyanin), activation (tyrosinase), and four-electron reduction to water (multicopper...

Thermocapillary convection around gas bubbles: an important natural effect for the enhancement of heat transfer in liquids under microgravity.

Annals of the New York Academy of Sciences

Betz J, Straub J.
PMID: 12446327
Ann N Y Acad Sci. 2002 Oct;974:220-45. doi: 10.1111/j.1749-6632.2002.tb05910.x.

In the presence of a temperature gradient at a liquid-gas or liquid-liquid interface, thermocapillary or Marangoni convection develops. This convection is a special type of natural convection that was not paid much attention in heat transfer for a long...

Dynamics of laser desorption and ablation of metals at the threshold on the femtosecond time scale.

Physical review letters

Schmidt V, Husinsky W, Betz G.
PMID: 11030935
Phys Rev Lett. 2000 Oct 16;85(16):3516-9. doi: 10.1103/PhysRevLett.85.3516.

The dynamics of the laser-ablation (-desorption) process of metals (Al, Ag, Fe, and Ni) initiated by 30 fs laser pulses has been investigated by interferometric time-resolved pump-probe measurements. It is postulated that a sufficiently high density of hot electrons...

Measurement of Lagrangian velocity in fully developed turbulence.

Physical review letters

Mordant N, Metz P, Michel O, Pinton JF.
PMID: 11736341
Phys Rev Lett. 2001 Nov 19;87(21):214501. doi: 10.1103/PhysRevLett.87.214501. Epub 2001 Nov 02.

We have developed a new experimental technique to measure the Lagrangian velocity of tracer particles in a turbulent flow, based on ultrasonic Doppler tracking. This method yields a direct access to the velocity of a single particle at a...

Mechanism of CO exchange on cis-[M(CO)2X2]- complexes (M=Rh,Ir;X=Cl, Br, or I).

Inorganic chemistry

Churlaud R, Frey U, Metz F, Merbach AE.
PMID: 11272539
Inorg Chem. 2000 Jan 24;39(2):304-7. doi: 10.1021/ic9910763.

The CO exchange on cis-[M(CO)2X2]- with M = Ir (X = Cl, la; X = Br, 1b; X = I, 1c) and M = Rh (X = Cl, 2a; X = Br, 2b; X = I, 2c) was studied...

Robust entanglement through macroscopic quantum jumps.

Physical review letters

Metz J, Trupke M, Beige A.
PMID: 16907557
Phys Rev Lett. 2006 Jul 28;97(4):040503. doi: 10.1103/PhysRevLett.97.040503. Epub 2006 Jul 27.

We propose an entanglement generation scheme that requires neither the coherent evolution of a quantum system nor the detection of single photons. Instead, the desired state is heralded by a macroscopic quantum jump. Macroscopic quantum jumps manifest themselves as...

Immunological characterization of two dominant tonoplast polypeptides.

Plant physiology

Betz M, Dietz KJ.
PMID: 16668546
Plant Physiol. 1991 Dec;97(4):1294-301. doi: 10.1104/pp.97.4.1294.

At least 14 distinct polypeptides reside in the tonoplast of barley (Hordeum vulgare) mesophyll vacuoles. Two of the polypeptides were isolated from two-dimensional separations of vacuoplast membrane proteins and used for immunization. With the antisera, the localization on the...

Successful transureteropyelostomy after heminephrectomy of a bilateral hydronephrotic horseshoe kidney: a case report.

Journal of medical case reports

Gerullis H, Eimer C, Betz D, Otto T.
PMID: 18631399
J Med Case Rep. 2008 Jul 16;2:231. doi: 10.1186/1752-1947-2-231.

INTRODUCTION: Horseshoe kidney is a rare congenital malformation that is found in approximately 0.25% of the general population and usually remains asymptomatic.CASE PRESENTATION: We report a successful transureteropyelostomy after heminephrectomy of the non-functional right moiety in a 25-year-old man...

Curved Crystal Transmission Optics for Energy-Dispersive X-ray Absorption Spectroscopy.

Journal of synchrotron radiation

Hagelstein M, Ferrero C, Hatje U, Ressler T, Metz W.
PMID: 16714811
J Synchrotron Radiat. 1995 Jul 01;2:174-80. doi: 10.1107/S0909049595006455.

The development of a curved crystal monochromator of the Laue type for energy-dispersive X-ray absorption spectroscopy is presented. The quality of the X-ray absorption spectra at high photon energies is compared with spectra measured with silicon crystals in the...

Showing 13 to 24 of 672 entries