| 1. |
|
|
| 2. |
- Kall, M., et al.
(author)
-
Resonance Raman scattering as a probe of oxygen dynamics in YBa2Cu3Ox
- 1998
-
In: Journal of Physics and Chemistry of Solids. - 0022-3697 .- 1879-2553. ; 59, s. 1988-1990
-
Journal article (peer-reviewed)abstract
- We report on the metastable photo-bleaching of the 2.15 eV yellow Raman resonance in oxygen deficient YBa2Cu3Ox (x = 6.35-6.87), extending investigations by Wake ct al. (Phys. Rev. Lett., 1991,67, 3728) for x approximate to 7. Polarization, x dependence and phonon spectra indicate that the resonance is localized at oxygen vacancies in long CuO-chains. The resonance is thermally reactivated from the metastable bleached state with a relaxation time tau similar to exp[Delta/k(B)T] with Delta approximate to 1 eV. The resulting temperature dependent equilibrium resonance intensity essentially miners the oxygen superstructure disordering around T* approximate to 100 degrees C observed in the same crystals by hard X-ray diffraction, thus offering a new effective probe of chain-oxygen dynamics in YBa2Cu3Ox. (C) 1998 Elsevier Science Ltd. All rights reserved.
|
|
| 3. |
- Liang, ST, et al.
(author)
-
Activities of constitutive promoters in Escherichia coli
- 1999
-
In: JOURNAL OF MOLECULAR BIOLOGY. - : ACADEMIC PRESS LTD. - 0022-2836. ; 292:1, s. 19-37
-
Journal article (other academic/artistic)abstract
- The in vivo activities of seven constitutive promoters in Escherichia coli have been determined as functions of growth rate in wild-type relA(+) spoT(+) strains with normal levels of guanosine tetraphosphate (ppGpp) and in ppGpp-deficient Delta relA Delta
|
|
| 4. |
|
|
| 5. |
|
|
| 6. |
|
|
| 7. |
- Katz, Jacob, et al.
(author)
-
Interpretation of change scores in ordinal clinical scales and health status measures: The whole may not equal the sum of the parts
- 1996
-
In: Journal of clinical epidemiology. - : Elsevier Inc. - 1878-5921 .- 0895-4356. ; 49:7, s. 711-717
-
Journal article (peer-reviewed)abstract
- The objective of this study was to analyze the problem of interpreting change scores of ordinal health status measures for clinical research or practice. Methods used included exploration of the generation of change scores in the physical ability scale of the SF-36, one of the most widely used generic health status instruments. Resulting data are presented as the ranking of items according to baseline score; a percentage of patients with severe difficulty and Rasch analysis provided the same rank order of item difficulty. On the interval scale provided by the Rasch model a concentration of items reflecting moderate difficulty occurred. This “inflates” numerical gains for patients with moderate disability compared to patients with very severe or minor physical disability. Calibration of change scores using patient perception of the level of change in function showed important variation of numerical gains with baseline. We conclude that numerically equal gains may differ in their meaning depending on baseline health status. It is recommended that distribution of baseline health status measures and distribution of responders by baseline status be reported in evaluative studies.
|
|
| 8. |
|
|
| 9. |
- Liang, ST, et al.
(author)
-
Decay of rplN and lacZ mRNA in Escherichia coli
- 1999
-
In: JOURNAL OF MOLECULAR BIOLOGY. - : ACADEMIC PRESS LTD. - 0022-2836. ; 288:4, s. 521-538
-
Journal article (other academic/artistic)abstract
- To examine the previously proposed retroregulation model of spc mRNA degradation, two strains of Escherichia coli B/r were used; one has wild-type spe and lac operons and the other has a inc operon deletion, a wild-type spc operon, and a P-spc-rplN-lacZ f
|
|
| 10. |
|
|
| 11. |
|
|
| 12. |
|
|
| 13. |
|
|
| 14. |
|
|
| 15. |
- Stucki, G, et al.
(author)
-
Use of Misoprostol in the Elderly : Is the Expense Justified?
- 1996
-
In: Drugs & aging. - : Springer Science and Business Media LLC. - 1179-1969 .- 1170-229X. ; 8:2, s. 84-88
-
Journal article (peer-reviewed)abstract
- Misoprostol is a prostaglandin E1 analogue which reduces both gastric ulcerations and clinically important bleeding in patients taking nonsteroidal antiinflammatory drugs (NSAIDs). Economic evaluations of prophylactic use of misoprostol with NSAIDs differ in their conclusions mainly because of different assumptions regarding the absolute risk reduction of symptomatic ulcers. Assuming a conservative estimate of the absolute risk reduction based on new effectiveness data, all studies would have concluded that misoprostol prophylaxis results in net costs in the general population of NSAID users. However, in the elderly with a clearly increased risk of gastrointestinal (GI) lesions and ulcer complications, and an increased hospitalisation rate, misoprostol may be cost saving. Also, in the elderly the gain in quality of life seems to offset the uncertain reduction in quality of life due to the adverse effects of misoprostol. However, the suggestion that misoprostol prophylaxis in the elderly is cost effective or cost saving needs to be confirmed in further studies.
|
|
