The insoluble matter of coal tar. VII. Dilution of tars

Gas Chromatographic Studies of Vitamins D2 and D3

“…The gas chromatographic behavior of steroids can be closely correlated with their structure, as first shown clearly by Clayton (4) and elaborated by several other investigators (3,15,22). In general, the introduction of a functional group (or other substituent) is accompanied by a well defined relative change in retention volume, conveniently expressible as a retention factor which is characteristic of the group and its location.…”

Surface Tension of Pure Liquids and Binary Liquid Mixtures

“…(a) Experimental surface tension, σ (▪, this work; solid line, linear fit of eq 1), of heptane obtained by the pendant drop apparatus in comparison with values from the literature: □, Grigor'ev et al; ○, Abdulagatov et al; ▵, Volyak et al; ▿, Aguila-Hernandez et al; ◇, Vargaftik; open triangle pointing left, McLure et al; open triangle pointing right, Shukla et al; ⬢, Pugachevich et al; ☆, Jasper et al; pentagon, Jasper et al; +, Vogel; ×, Quayle et al; *, Tillman et al; dot in a box, Shafrin et al; ⊙, Wibaut et al; dot in a diamond, Ramakrishnan et al; ⊗, Edgar et al; × in a box, Abramzon et al (b) Experimental surface tension, σ (▪, this work; solid line, linear fit of eq 1), of toluene obtained by the pendant drop apparatus in comparison with experimental values from the literature: ⊗, Jasper; ×, Vargaftik; □, Kalbassi et al; ○, Rossini et al; ▿, Morino; open triangle pointing left, Prabhakar et al; open triangle pointing right, Wanchoo et al; dot in a diamond, Korosi et al; ☆, Agarwal et al; pentagon, Donaldson et al; +, Vogel; dot in a box, Buehler et al; *, Hennaut-Roland et al; ▴, Sugden; ·, Kremann et al; ▾, Jaeger; filled triangle pointing left, Walden et al; filled triangle pointing right, Watanabe et al; ⬢, Tonomura et al; ★, Mahl et al; ⊙, Herz et al; −, Green et al. ; |, Bartell et al; ◇, Damerell et al; ◆, Richards et al; ▵, Harkins et al; thin filled triangle pointing right, Voronkov; slant in a circle, Trimble; ⊕, Krishna et al; ⊞, Transue et al (c) Experimental surface tension, σ (▪, this work; solid line, linear fit of eq 1), of N , N -dimethylformamide obtained by the pendant drop apparatus in comparison with other available experimental values from the literature: □, Wadewitz; ○, Stairs et al; ▵, Hradetzky et al; ▿, Gopal et al; ◇, Granzhan ...…”

Investigations on vitamin D esters synthesized in rats. Detection and identification

“…Preliminary chromatography on floridin earth removed retinyl esters (Green, 1951) and separated the vitamin D 'ester' from free vitamin D. A column, 1cm. int.…”