Study of point defects at low concentrations by internal-friction measurement of their interaction with dislocations

✍ Scribed by C. Minier

Book ID: 112833359
Publisher: Springer-Verlag,Italian Physical Society
Year: 1976
Weight: 733 KB
Volume: 33
Category: Article
ISSN: 0369-3554
DOI: 10.1007/bf02722477

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Study of interaction of point defects wi

Study of interaction of point defects with dislocations in silicon by means of irradiation in an electron microscope

✍ Fedina, L. I. ;Aseev, A. L. 📂 Article 📅 1986 🏛 John Wiley and Sons 🌐 English ⚖ 859 KB

Studies of the interaction of dislocatio

Studies of the interaction of dislocations with point defects in germanium by means of irradiation in a high-voltage electron microscope

✍ Aseev, A. L. ;Ivakhnishin, V. M. ;Hoehl, D. ;Bartsch, H. 📂 Article 📅 1987 🏛 John Wiley and Sons 🌐 English ⚖ 771 KB

A study on the interaction between magne

A study on the interaction between magnetic domain walls and dislocations in pure iron by measurements at low amplitudes of magnetoelastic damping

✍ Degauque, J. ;Astie, B. ;Levade, C. 📂 Article 📅 1977 🏛 John Wiley and Sons 🌐 English ⚖ 185 KB

Saliva and serum samples were collected

Saliva and serum samples were collected from eight healthy volunteers every two hours during a 26-hour period. Melatonin concentrations were measured by radioimmunoassay after chloroform extraction using radioiodinated melatonin as a tracer. Five of the subjects had high serum melatonin levels at night (peak levels higher than 75 pg/ml); in three subjects the highest serum melatonin concentration was 20-40 pg/ml. All subjects had low levels (P <0.001, was obtained for all detectable value pairs (n= 73). The regression and correlation coefficients were almost equal for the peak values of melatonin and during the rising and descending phases of the secretion patterns. However, no significant correlation was found between low daytime salivary and serum concentrations when calculated separately. In the five high-secretors the melatonin levels in saliva reflected reliably the changes in serum, but in the three low-secretors the correlation between salivary and serum melatonin was not significant. The proportion of melatonin found in saliva decreased with increasing serum melatonin levels. Circadian rhythm parameters were estimated by single cosinor analysis. The acrophases did not differ significantly within a subject in the concomitant measurements of serum and salivary melatonin. The measurements of salivary melatonin levels seem valid for studies on melatonin rhythms, but the melatonin concentrations measured in saliva do not always consistently reflect the absolute concentrations in blood.

✍ Maija-Liisa Laakso; Tarja Porkka-Heiskanen; Aino Alila; Dag Stenberg; Gunnar Joh 📂 Article 📅 1990 🏛 John Wiley and Sons 🌐 English ⚖ 622 KB