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- Jiang, Z. K, et al.
(författare)
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Lifetimes of Rydberg Levels In the Perturbed 6snp P-1,3(1) Series of Ybi
- 1995
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Ingår i: Physics Letters. Section A: General, Atomic and Solid State Physics. - : Elsevier BV. - 0375-9601. ; 204:1, s. 49-53
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Tidskriftsartikel (refereegranskat)abstract
- Using two methods: (1) three-step excitation and (2) single UV photon excitation in an atomic beam with direct observation of the decay of the fluorescence light, we have measured the lifetimes of the Rydberg levels of YbI belonging to the perturbed series 6snp J = 1 levels. The measured values have been interpreted by the multichannel quantum defect theory (MQDT).
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| 2. |
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| 3. |
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| 4. |
- Levinsson, Anders, et al.
(författare)
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Developmental tuning in a spinal nociceptive system: effects of neonatal spinalization
- 1999
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Ingår i: JNeurosci. - 1529-2401. ; 19:23, s. 10397-10403
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Tidskriftsartikel (refereegranskat)abstract
- Recent studies indicate a modular organization of the nociceptive withdrawal reflex system. Each module has a characteristic receptive field, closely matching the withdrawal movement caused by its effector muscle. In the rat, the strength of the sensory input to each module is tuned during the first postnatal weeks, i.e., erroneous spinal connections are depressed, and adequate connections are strengthened. To clarify if this tuning is dependent on supraspinal structures, the effect of a complete neonatal spinal cord transection on the postnatal tuning of withdrawal reflexes was studied. The nociceptive receptive fields of single hindlimb muscles and compound withdrawal reflexes were examined in decerebrate unanesthetized and awake rats, respectively. Noxious thermal CO2 laser stimulation was used to evoke reflex responses. Neonatal spinal cord transection resulted in a disrupted reflex organization in the adult rat, resembling that previously found in neonatal rats. The receptive fields of single hindlimb muscles exhibited abnormal distribution of sensitivity not matching the withdrawal action of the effector muscles. Likewise, the composite nocifensive movements, as documented in the awake rat, often resulted in erroneous movements toward the stimulus. It is concluded that withdrawal reflexes do not become functionally adapted in rats spinalized at birth. These findings suggest a critical role for supraspinal systems in the postnatal tuning of spinal nociceptive systems.
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| 5. |
- Luo, X, et al.
(författare)
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Transparent ion-conducting ceria-zirconia films made by sol-gel technology
- 1998
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Ingår i: SOLAR ENERGY MATERIALS AND SOLAR CELLS. - : ELSEVIER SCIENCE BV. - 0927-0248. ; 53:3-4, s. 341-347
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Tidskriftsartikel (refereegranskat)abstract
- Films of Ce-Zr oxide were made by sol-gel deposition according to three different routes. Cyclic voltammetry showed that Li+ intercalation/deintercalation took place if the Ce content was sufficient. The films had a high transmittance for visible ligh
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