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Showing 25 to 36 of 867 entries
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Synthesis of (E)-4-hydroxydimethylallyl diphosphate. An intermediate in the methyl erythritol phosphate branch of the isoprenoid pathway.

The Journal of organic chemistry

Fox DT, Poulter CD.
PMID: 12098326
J Org Chem. 2002 Jul 12;67(14):5009-10. doi: 10.1021/jo0258453.

The syntheses of (E)-1-hydroxy-2-methyl-2-buten-4-yl diphosphate ((E)-4-hydroxydimethylallyl diphosphate, HDMAPP), an intermediate in the methyl erythritol phosphate pathway, and (E)-[4-(2)H]HDMAPP were accomplished in two steps from (E)-4-chloro-2-methyl-2-butenal. The synthetic route is easily adaptable for the facile incorporation of tritium at C-4...

Calibration of the National Institute of Standards and Technology tritiated-water standards.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

Unterweger MP, Lucas LL.
PMID: 10724401
Appl Radiat Isot. 2000 Mar;52(3):527-31. doi: 10.1016/s0969-8043(99)00205-5.

Massic activity values obtained for NBS/NIST tritiated water SRMs 4927 and 4927E, using internal gas-proportional counting, are reported. The massic activity ratios of all of the available NBS/NIST tritiated water SRMs and samples of the Level 1 and Level...

Development of a p38 Kinase Binding Assay for High Throughput Screening.

Journal of biomolecular screening

Warrior U, Chiou XG, Sheets MP, Sciotti RJ, Parry JM, Simmer RL, Surber BW, Burns DJ, Beutel BA, Mollison KW, Djuric SW, Trevillyan JM.
PMID: 10838421
J Biomol Screen. 1999;4(3):129-135. doi: 10.1177/108705719900400306.

p38 is a member of the mitogen-activated protein kinase (MAPK) family of serine/threonine kinases, which is activated by cellular stressors and has been shown to be a critical enzyme in the synthesis and action of proinflammatory cytokines, tumor necrosis...

Wavelet transform analysis of dynamic speckle patterns texture.

Applied optics

Limia MF, Núñez AM, Rabal H, Trivi M.
PMID: 12440527
Appl Opt. 2002 Nov 10;41(32):6745-50. doi: 10.1364/ao.41.006745.

We propose the use of the wavelet transform to characterize the time evolution of dynamic speckle patterns. We describe it by using as an example a method used for the assessment of the drying of paint. Optimal texture features...

Stoichiometric and catalytic deuterium and tritium labeling of "unactivated" organic substrates with cationic Ir(III) complexes.

Organic letters

Skaddan MB, Yung CM, Bergman RG.
PMID: 14703338
Org Lett. 2004 Jan 08;6(1):11-3. doi: 10.1021/ol0359923.

[reaction: see text] Ir(III) complex [Cp(PMe(3))IrMe(CH(2)Cl(2))][BAr(f)] (1) was used to introduce deuterium stoichiometrically into substituted naphthalene/benzene templates and several "drug-like" entities. The exchange process is tolerant of a wide array of functional groups. Labeling of warfarin using subatmospheric pressures...

Influence of transverse diffusion within the proton beam fast-ignitor scenario.

Physical review. E, Statistical, nonlinear, and soft matter physics

Barriga-Carrasco MD, Maynard G, Kurilenkov YK.
PMID: 15697514
Phys Rev E Stat Nonlin Soft Matter Phys. 2004 Dec;70(6):066407. doi: 10.1103/PhysRevE.70.066407. Epub 2004 Dec 22.

Fast ignition of an inertial confinement fusion target by an energetic proton beam is here re-examined. We put special emphasis on the role of the transverse dispersion of the beam induced during its travel between the proton source and...

Color storage and gray level pseudocoloring using a speckle carrier.

Applied optics

Trivi M, Bolognini N, Sicre EE, Rabal HJ, Garavaglia M.
PMID: 18204563
Appl Opt. 1984 Jan 15;23(2):341. doi: 10.1364/ao.23.000341.

No abstract available.

Environmental fate of five radio-labeled coal conversion by-products evaluated in a laboratory model ecosystem.

Environmental health perspectives

Lu PY, Metcalf RL, Carlson EM.
PMID: 17539148
Environ Health Perspect. 1978 Jun;24:201-8. doi: 10.1289/ehp.7824201.

Anthracene, fluorene, carbazole, dibenzofuran, and dibenzothiophene are five typical by-products of coal conversion which are likely to be environmental pollutants. These were radiolabeled to high specific activity and purity by simple tritium exchange and evaluated for environmental fate in...

Formation of Free Radicals in Tritiated H2O and D2O Ice.

Science (New York, N.Y.)

Kroh J, Green BC, Spinks JW.
PMID: 17742776
Science. 1961 Apr 07;133(3458):1082. doi: 10.1126/science.133.3458.1082.

By using tritium as an internal source of radiation, electron spin resonance spectra may be obtained for samples contained in glass without the usual disturbing effects due to irradiated glass. The production of OH and OD radicals in tritiated...

(83m)Kr radioactive source based on (83)Rb trapped in cation-exchange paper or in zeolite.

Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine

Vénos D, Spalek A, Lebeda O, Fiser M.
PMID: 15955704
Appl Radiat Isot. 2005 Sep;63(3):323-7. doi: 10.1016/j.apradiso.2005.04.011.

The mono-energetic conversion electrons from the decay of (83m)Kr represent a unique tool for energy calibration and systematic studies of the tritium beta spectrum measured in neutrino mass determination experiments. For this reason, the corresponding parent isotope was produced...

Synthesis of Fibrils in Vitro by a Solubilized Cellulose Synthase from Acetobacter xylinum.

Science (New York, N.Y.)

Lin FC, Brown RM, Cooper JB, Delmer DP.
PMID: 17791798
Science. 1985 Nov 15;230(4727):822-5. doi: 10.1126/science.230.4727.822.

A digitonin-solubilized cellulose synthase was prepared from Acetobacter xylinum. When this enzyme was incubated under conditions known to lead to active synthesis of 1,4-beta-D-glucan polymer (cellulose), electron microscopy revealed that clusters of fibrils were assembled within minutes. Individual fibrils...

Tritium and Phosphorus-32 in High-Resolution Autoradiography.

Science (New York, N.Y.)

Caro LG, Schnös M.
PMID: 17737789
Science. 1965 Jul 02;149(3679):60-2. doi: 10.1126/science.149.3679.60.

The sensitivity of monolayers of Ilford L-4 nuclear emulsion to beta(-)-particles is approximately 0.20 grain per particle emitted for H(3), and 0.025 grain per particle for p(32). The sensitivity for thick layers is 1.3 grains per tritium beta(-)-particle emitted...

Showing 25 to 36 of 867 entries