𝔖 Bobbio Scriptorium
✦   LIBER   ✦

A Study on the Correlation Between Program Contact Hours and the Successful Matriculation into College

✍ Scribed by Taylor, Jennifer D.; Kiovsky, Richard D.


Book ID
121546718
Publisher
Springer US
Year
2014
Tongue
English
Weight
279 KB
Volume
39
Category
Article
ISSN
0094-5145

No coin nor oath required. For personal study only.


πŸ“œ SIMILAR VOLUMES


Studies on the NMR contact shifts induce
✍ I. Morishima; K. Endo; T. Yonezawa πŸ“‚ Article πŸ“… 1971 πŸ› Elsevier Science 🌐 English βš– 352 KB

lIf and 13C NMR contact shifts have been observed for chloroform, methylene cblorido and phenylacetylene in the presence of di-tertbutyl nitroxido radical (DBNO). Upfield and downfield contact shifts were observed for 1~ and 13f.2 NMR resonances, respectively. The relative values of 13C contact shif

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 πŸ“‚ Article πŸ“… 1990 πŸ› John Wiley and Sons 🌐 English βš– 622 KB