✦ LIBER ✦

Separation of phenolic compounds from carbon chloroform extract for individual chromatographic identification and measurement

✍ Scribed by Eichelberger, James W.; Dressman, Ronald C.; Longbottom, James E.

Book ID: 126159183
Publisher: American Chemical Society
Year: 1970
Tongue: English
Weight: 315 KB
Volume: 4
Category: Article
ISSN: 0013-936X
DOI: 10.1021/es60042a008

No coin nor oath required. For personal study only.

📜 SIMILAR VOLUMES

Notes - p-Phenylazobenzoyl Chloride for

Notes - p-Phenylazobenzoyl Chloride for Identification and Chromatographic Separation of Colorless Compounds. III. Phenols.

✍ Woolfolk, E.; Taylor, J. 📂 Article 📅 1957 🏛 American Chemical Society 🌐 English ⚖ 395 KB

High-performance liquid chromatographic

High-performance liquid chromatographic separation and identification of phenolic compounds from leaves of Betula pubescens and Betula pendula

✍ V. Ossipov; K. Nurmi; J. Loponen; E. Haukioja; K. Pihlaja 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 715 KB

A chromatographic procedure for the sepa

A chromatographic procedure for the separation and detection of pyridine nucleotides and related compounds from tissue extracts

✍ Zigmund Z. Ziporin; Richard W. Hanson 📂 Article 📅 1966 🏛 Elsevier Science 🌐 English ⚖ 486 KB

Supplementary data for the paper-chromat

Supplementary data for the paper-chromatographic separation and identification of phenol derivatives and related compounds of biochemical interest, using a “reference system”

✍ L. Reio 📂 Article 📅 1961 🏛 Elsevier Science ⚖ 902 KB

Extraction-chromatographic preconcentrat

Extraction-chromatographic preconcentration with chromatomembrane separation of extract from aqueous phase for luminescence determination of oil products and phenols in natural water by flow injection analysis

✍ A.L Moskvin; L.N Moskvin; A.V Moszhuchin; V.V Fomin 📂 Article 📅 1999 🏛 Elsevier Science 🌐 English ⚖ 114 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