P149 The association between the cumulative dose of aminoglycoside exposure and hearing loss in children with cystic fibrosis
JOURNAL OF CYSTIC FIBROSIS, cilt.21, sa.June, ss.106-107, 2022 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Özet
- Cilt numarası: 21 Sayı: June
- Basım Tarihi: 2022
- Doi Numarası: 10.1016/s1569-1993(22)00480-5
- Dergi Adı: JOURNAL OF CYSTIC FIBROSIS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, EMBASE, MEDLINE
- Sayfa Sayıları: ss.106-107
- Marmara Üniversitesi Adresli: Evet
Özet
We discuss the excitation of sterile neutrinos in the early universe using general quantum kinetic equations, which also incorporate a possible primordial magnetic field $B$. We find a new contribution to the excitation propability, which has its origin in the shrinkage of the spin vector. In the absence of $B$ nucleosynthesis implies the constraint $\mid \Delta m^2\mid\sin^22\theta_0\lsim 1.6\times 10^{-6}~{\rm eV}^2$ which is more restrictive than previous estimates. We also present examples of possible stringent limits for $B\ne 0$.