# ALBERT

## All Library Books, journals and Electronic Records Telegrafenberg

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• 1
Electronic Resource
Springer
Molecular genetics and genomics 1 (1908), S. 261-261
ISSN: 1617-4623
Source: Springer Online Journal Archives 1860-2000
Topics: Biology
Type of Medium: Electronic Resource
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• 2
Electronic Resource
Chichester : Wiley-Blackwell
Biological Mass Spectrometry 22 (1987), S. 647-650
ISSN: 0030-493X
Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology
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• 3
Electronic Resource
New York, NY : Wiley-Blackwell
ISSN: 0951-4198
Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Physics
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• 4
Electronic Resource
New York, NY : Wiley-Blackwell
ISSN: 0951-4198
Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Physics
Notes: The work presented here introduces a new variable parameter in the design of quadrupole collision cells. A brief summary of the mathematical theory is given to demonstrate how the maximum value of the parameter q may be altered. This is achieved through changing the driving function used for the rod potentials.
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• 5
Electronic Resource
New York, NY : Wiley-Blackwell
ISSN: 0951-4198
Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Physics
Notes: A brief introduction to the mathematical theory of quadrupole systems is given and the configuration of hyperbolic and circular cross-section rods is considered. Application of the theory of electrostatics to the latter case indicates that multipole contributions to the field occur which influence the ion trajectories. We have considered motion in the x-z plane of a static quadrupole (DC-only) for the simplest case of a 1:1 combination of quadrupole and dodecapole contributions. The quadrupole contribution to ion motion is simple harmonic and may be described as a sine function, whereas the dodecapole contribution may only be obtained by solving the appropriate elliptic integral. This solution gives rise to a sine (amplitude) or sn function. In the case of collision cells (RF-only) we have attempted to solve the Mathieu equation both analytically and numerically. Both stable and unstable trajectories may be calculated from these solutions and are presented in various formats. Some consideration is also given to the problems of collisional interaction and the associated difficulties likely to be encountered when the study is expanded to include this phenomenon.
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• 6
Electronic Resource
New York, NY : Wiley-Blackwell
ISSN: 0951-4198
Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Physics
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• 7
Electronic Resource
New York, NY [u.a.] : Wiley-Blackwell
Bioelectromagnetics 18 (1997), S. 431-438
ISSN: 0197-8462
Keywords: ELF ; embryonic development ; PMF ; abnormalities ; 60 Hz ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Biology , Physics
Notes: Several investigators have reported robust, statistically significant results that indicate that weak (∼ 1 μT) magnetic fields (MFs) increase the rate of morphological abnormalities in chick embryos. However, other investigators have reported that weak MFs do not appear to affect embryo morphology at all. We present the results of experiments conducted over five years in five distinct campaigns spanning several months each. In four of the campaigns, exposure was to a pulsed magnetic field (PMF); and in the final campaign, exposure was to a 60 Hz sinusoidal magnetic field (MF). A total of over 2500 White Leghorn chick embryos were examined. When the results of the campaigns were analyzed separately, a range of responses was observed. Four campaigns (three PMF campaigns and one 60 Hz campaign) exhibited statistically significant increases (P ≥ 0.01), ranging from 2-fold to 7-fold, in the abnormality rate in MF-exposed embryos. In the remaining PMF campaign, there was only a slight (roughly 50%), statistically insignificant (P = 0.2) increase in the abnormality rate due to MF exposure. When the morphological abnormality rate of all of the PMF-exposed embryos was compared to that of all of the corresponding control embryos, a statistically significant (P ≥ .001) result was obtained, indicating that PMF exposure approximately doubled the abnormality rate. Likewise, when the abnormality rate of the sinusoid-exposed embryos was compared to the corresponding control embryos, the abnormality rate was increased (approximately tripled). This robust result indicates that weak EMFs can induce morphological abnormalities in developing chick embryos. We have attempted to analyze some of the confounding factors that may have contributed to the lack of response in one of the campaigns. The genetic composition of the breeding stock was altered by the breeder before the start of the nonresponding campaign. We hypothesize that the genetic composition of the breeding stock determines the susceptibility of any given flock to EMF-induced abnormalities and therefore could represent a confounding factor in studies of EMF-induced bioeffects in chick embryos. Bioelectromagnetics 18:431-438, 1997. © 1997 Wiley-Liss, Inc.
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• 8
Electronic Resource
Chichester : Wiley-Blackwell
Biological Mass Spectrometry 9 (1982), S. 158-161
ISSN: 0306-042X
Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology
Notes: Field desorption and fast atom bombardment mass spectrometric procedures have been applied to the analysis of hydroxamate containing siderophores as their iron (III) complexes. Molecular ion species predominate in both field desorption and fast atom bombardment spectra. The results reported demonstrate the potential of these soft ionization techniques for the characterization of novel siderophores and siderophores metabolites.
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• 9
Electronic Resource
New York, NY : Wiley-Blackwell
ISSN: 0538-8066
Keywords: Chemistry ; Physical Chemistry
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Chemistry and Pharmacology
Notes: The title reaction has been investigated in the temperature range of 490-573 K. Initial reactant pressures were varied in the range of 0.2-5.2 torr (I2) and 2-20 torr (C6H5SiH3). The rate of iodine consumption, monitored spectrophotometrically, was found to obey \documentclass{article}\pagestyle{empty}\begin{document}$$- \frac{{d[{\rm I}_{\rm 2}]}}{{dt}} = \frac{{k_{3/2} [{\rm I}_{\rm 2}]^{{\raise0.7ex\hbox{1} \!\mathord{\left/ {\vphantom {1 2}}\right.\kern-\nulldelimiterspace} \!\lower0.7ex\hbox{2}}} [{\rm C}_{\rm 6} {\rm H}_{\rm 5} {\rm SiH}_{\rm 3}]}}{{1 + k'[HI]/[I_2]}}$$\end{document} both by initial rate and integrated equation fitting procedures. The effect of added initial HI conformed to this expression. The data are consistent with a conventional I-atom propagated chain reaction, and for the step \documentclass{article}\pagestyle{empty}\begin{document}$${\rm I}^{\rm .} + {\rm C}_{\rm 6} {\rm H}_{\rm 5} {\rm SiH}_{\rm 3} \to {\rm C}_{\rm 6} {\rm H}_{\rm 5} \mathop {\rm S}\limits^{\rm .} {\rm iH}_{\rm 2} + {\rm HI}$$\end{document} the rate constant is given by \documentclass{article}\pagestyle{empty}\begin{document}$${\rm log}k_1 (dm^3 /mol \cdot s) = (11.52 \pm 0.08) - (76.8 \pm 0.8{\rm kJ/mol})/RT{\rm ln}10$$\end{document} From this is derived the bond dissociation energy value C6H5SiH2—H = 374 kJ/mol(88 kcal/mol). A comparison with other Si—H dissociation energy values indicates that the “silabenzyl” stabilization energy is small, ≈7 kJ/mol.
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• 10
Electronic Resource
New York, NY [u.a.] : Wiley-Blackwell
Bioelectromagnetics 19 (1998), S. 53-56
ISSN: 0197-8462
Keywords: ELF ; ODC ; EMF ; Noise ; embryonic development ; Life and Medical Sciences ; Occupational Health and Environmental Toxicology
Source: Wiley InterScience Backfile Collection 1832-2000
Topics: Biology , Physics
Notes: Previously, we have shown that the application of a weak (4 μT) 60 Hz magnetic field (MF) can alter the magnitudes of the ornithine decarboxylase (ODC) activity peaks which occur during gastrulation and neurulation of chick embryos. We report here the ODC activity of chick embryos which were exposed to the superposition of a weak noise MF over a 60 Hz MF of equal (rms strength). In contrast to the results we obtain with a 60 Hz field alone, the activity of ODC in embryos exposed to the superposition of the incoherent and 60 Hz fields was indistinguishable from the control activity during both gastrulation and neurulation. This result adds to the body of experimental evidence which demonstrates that the superposition of an incoherent field inhibits the response of biological systems to a coherent MF. The observation that a noise field inhibits ODC activity changes is consistent with our speculation that MF-induced ODC activity changes during early development may be related to MF-induced neural tube defects at slightly later stages (which are also inhibited by the superposition of a noise field). Bioelectromagnetics 19:53-56, 1998. © 1998 Wiley-Liss, Inc.