Vyrene


Base, it stimulates all parts of the nervous system and in large doses produces convulsions. It is used for killing vermin.  [c.374]

Fessenden R W and Verma N C 1976 Time resolved electron spin resonance spectroscopy. III. Electron spin resonance emission from the hydrated electron. Possible evidence for reaction to the triplet state J. Am. Chem. Soc. 98 243-4  [c.1619]

Verma N 0 and Fessenden R W 1976 Time resolved ESR spectroscopy. IV. Detailed measurement and analysis of the ESR time profile J. Chem. Phys. 65 2139-60  [c.1621]

R. Barone, M. Chanon, Computer Aids to Chemistry 19 G. Vernin, M. Chanon, Eds., Ellis Horwood-John Wiley, New York (1986).  [c.280]

Chlorophyll a (L.P. Vernon, 1966) contains an unsymmetrical porphyrin chromophore with two special features the double bond between C-17 and C-18 is hydrogenated and carhon atoms 13 and 15 hear a carboxylated, isocyclic cyclopentanone ting E.  [c.257]

The setup as seen in Figure 1 mainly consists of a Varian Linatron 3000A linear accelerator (LINAC) as radiation source, a rotational stage for sample manipulation, and a two-dimensional high-energy x-ray detector array consisting of four amorphous silicon area detectors Heimann RIS 256. The source to detector distance is 3.7 m.  [c.492]

The core of the building is a large bunker with radiation shielding. It is used since many years for conventional radiography on large and very large objects using GAMMAMAT TK with strong Co-60 sources and a VARIAN Linatron 3000 of 9 MeV.  [c.584]

The source of radiation is a linear accelerator with selectable primary energies of 6, 9 or 11 MeV ( VARIAN Linatron 3000 A). The output of the LINAC at 9 MV is 3000 rad ( 30 Gy) per minute. The pulse length is 3.8 microseconds with repetition frequencies between 50 and 250 Hertz.  [c.584]

Forbes M D E, Peterson J and Breivogel C S 1991 Simple modification of Varian E-line microwave bridges for fast time-resolved EPR spectroscopy Rev. Sc/. Instrum. 66 2662-5  [c.1619]

Vuurman M A and Waohs I E 1992 In situ Raman speotrosoopy of alumina-supported metal oxide oatalysts J. Rhys. Chem. 96 5008-16  [c.1797]

Prenkel, D. Pree energy computation and first order phase transitions. In Molecular Dynamic Simulation of Statistical Mechanical Systems, Enrico Fermi Summer School, Varenna 1985, G. Ciccotti and W. Hoover, eds. North Holland, Amsterdam (1986) 43-65.  [c.28]

The electronic data analysis service (ELECTRAS), which was developed at the Com-puter-Chemie-Centrum of the University of Erlangen-Ntlmberg through a project supported by the DFN-Verein and the BMBF, is a web-based application which presents an interface to various kinds of data analysis methods. It offers the methods  [c.449]

For example, semi-empirical calculation s on a substrate m oleculc provide a set o f ch arges th at you can use in a m olecu lar m ech an ics calculation of the interaction of that substrate with another molecule. Fo include the effects of po lari,ration, repeated sem i-empiri-cal calculations can provide a set of charges that respond to the en viron rn en t.  [c.138]

The atom type tlefin es the chemical eii viroiini eii t of an atom. The basic idea is that not all carbon atoms in molecules are the same and can be distinguished by the following  [c.169]

Oxidation to acids. Varm together in a small conical flask on a water-bath for lo minutes a mixture of 0 5 ml. of benzaldehyde or salicylaldehyde, 15 ml. of saturated KMn04 solution, and 0-5 g. of NajCOj. Then acidify with cone. HCl, and add 25% sodium sulphite solution until the precipitated manganese dioxide has redissolved. On cooling, benzoic or salicylic acid crystallises out.  [c.343]

The enantiomeric excess of 3.10b and 3.1 Og, has been determined from H-NMR measurements (Varian VXR 300 MHz) in the presence of the chiral europium tris-(3-(trifluormethylhydroxymethylene)-d-camphorate) (Eu(tfc)3) shift reagent. To a solution of 100 mg of Diels-Alder adduct in 0.7 ml of CDQj, 10-25 1 portions of a solution of 30 mg of Eu(tfc) j in 250 1 of CDClj were added and the H-NMR spectrum was recorded. For the enantiomers of endo-3.10g, the signals of one of the vinyl protons ( = 5.82 ppm in the absence of shift reagent) were baseline separated after addition of 65 1 (0.2 eq.) of the solution of the shift reagent. For 3.10b the sirglet of the phenyl protons at 7.15 ppm (in the absence of shift reagent) was monitored. After addition of 125 1 (0.5 eq.) of the solution of the shift reagent, the enantiomeric excess was determined after integration of the signal of the minor enantiomer (7.06 ppm, s, 4H) and of half of the sigrrificanfly shifted and splitted signal of the major enantiomer (7.25 ppm, d, 2H).  [c.103]

Mikami, K. Kotera, O. Motoyama, Y. Sakagushi, H. Synlett. 1995, 975 (a) Corey, E. J. Matsumura, Y. Tetrahedron Lett. 1991, 32, 6289 (b) Corey, E. J. Loh, T. Roper, T. D. Azimioara, M. D. Noe, M.. 7. Am. Chem. Soc. 1992, 114, 8290 (a) Corey, E. J. Becker, BC. B. Varma, R. K.. 7. Am. Chem. Soc. 1972, 94, 8616 (b) Sawamura, M. Ito, Y. Chem. Rev. 1992, 92, 857 (c) Jones, G. B. Chapman, B. J. Synthesis 1995, 475  [c.106]

Routine spectra were taken on a Varian VXR 200 MHz or Varian VXR 300 MHz spectrometer. The aromatic shift measurements and the paramagnetic relaxation measurements were performed on a Bruker AC 250 MHz spectrometer. Proton chemical shifts were determined relative to the signal of HOD (4.63 ppm). Paramagnetic relaxation times were determined using the inversion recovery experiment. The variable delay times between the 180" and the 90" pulse were chosen so that they cover the relaxation process during the time-span of minimally five times T]. The 10-16 different delay times were in a random order so as to minimise systematic errors that might result from fluctuations of the strergth of the magnetic field during the experiment. The delay time between  [c.155]

Oxidation to adds. Varm together in a small conical flask on a water-bath for lo minutes a mixture of 0-5 ml. of benzaldehyde or salicylaldehyde, 15 ml. of saturated KMn04 solution, and 0-5 g. of NajCOj. Then acidify with cone. HCl, and add 25% sodium sulphite solution until the precipitated manganese dioxide has redissolved. On cooling, benzoic or salicylic acid crystallises out.  [c.343]

This really crazy looking method is one of them. There are a lot of things about it that make it very attractive. The first is the author of the article Rajender S. Varma. You will see in the Nitropropene section of this book (and in references from many other parts of the book) that this guy has been making a lot of strangely applicable advances in catalysis, amination, and reduction of amphetamines and related compounds. It is uncanny how often Strike has come across this person s work. It is like he is the Shulgin of basic precursor and amphetamine progress. Go figure  [c.123]

Recently, a nice bee named Quirks submitted an article from our new, favorite patron researcher Rajender S. Varma. This time the good doctor is tackling our azide problem with another novel use of his clay phase transfer catalyst system. This is just going to be  [c.155]


See pages that mention the term Vyrene : [c.6]    [c.286]    [c.290]    [c.567]    [c.1303]    [c.1418]    [c.2509]    [c.2570]    [c.2851]    [c.632]    [c.757]    [c.396]    [c.33]    [c.126]    [c.170]    [c.256]    [c.260]    [c.422]    [c.179]    [c.181]    [c.185]    [c.185]    [c.186]    [c.138]    [c.286]    [c.287]    [c.287]    [c.287]    [c.287]    [c.288]   
Plastics materials (1999) -- [ c.790 ]