Chromatographic adsorption analysis
01 Mar 1942-Industrial & Engineering Chemistry Analytical Edition (American Chemical Society)-Vol. 14, Iss: 3, pp 245-249
About: This article is published in Industrial & Engineering Chemistry Analytical Edition.The article was published on 1942-03-01 and is currently open access. It has received 84 citations till now. The article focuses on the topics: Expanded bed adsorption & Adsorption.
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TL;DR: In this paper, the authors provide an overview of recent trends in the use of high-performance liquid chromatography columns, both applied and investigative areas of the science are examined, and trends in technology, materials, techniques, and configuration are discussed.
Abstract: This work provides an overview of recent trends in the use of high-performance liquid chromatography columns. Both applied and investigative areas of the science are examined, and trends in technology, materials, techniques, and configuration are discussed.
10 citations
TL;DR: Commercial methods for extracting carotenes and xanthophylls from alfalfa, carrots and palm oil and utilization of these carotenoids as vitamin A precursors and coloring agents in margarines, dough products, Pharmaceuticals, stock and poultry feeds is discussed.
Abstract: Commercial methods are described for extracting carotenes and xanthophylls from alfalfa, carrots and palm oil. Utilization of these carotenoids as vitamin A precursors and coloring agents in margarines, dough products, Pharmaceuticals, stock and poultry feeds is discussed.
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TL;DR: The he te ro t roph ie phytof lage l la te Polytoma uvella is considered a descenden~ of t he chlorophyl lous pho tosyn the t i c Chlamydomonas of the class Chlorophyceae.
Abstract: The he te ro t roph ie phytof lage l la te Polytoma uvella is considered a descenden~ of t he chlorophyl lous pho tosyn the t i c Chlamydomonas of the class Chlorophyceae (FlZlTSCI~ 1948). I t s mo*ile s tage has a yel low-orange colour, while i ts res t ing s tage is charac te r ized b y the p roduc t ion of cysts t h a t are da rke r r ed (PI~I~GSI~EIH 1926; STlZ]~HLOW 1929). A s t u d y of the carotenoids and o ther l ipids of P. uvella was deemed in te res t ing because the carotenoids of the f lagellates have scarcely been inves t iga t ed (Goo~)wI~ 1952). The compara t i ve b iochemis t ry of t he caro tenoids of the phy~oflagellates m a y con t r ibu te to establistf ing phylogenet ic re la t ionships (GooI)wlN 1952; LwoFF 1951; HUTXEI~ and PRo. VASOLI 1951; ST~AI~ 1944).
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248 citations
TL;DR: The α-tocopherol as mentioned in this paper is a possibly the allophante of β-amyrin, which was derived from wheat germ oil thress aflophanates.
170 citations
TL;DR: A provisional formula for α-tocopherol is proposed, which when given in a single dose of 3 mg.
Abstract: We have prepared from the non-saponifiable matter of wheat germ oil thress aflophanates:
1. M.p. 250°. This is a possibly the allophante of β-amyrin. The alcohol regenrated from the allopohante has no vitamin E potency.
2. M.p. 138°, readily crystallizing in long needles. The analysis agree with values required by monollophantes of an alcohol, C39H50O2. The alcohol from this allophante apparenelly has some vitamin E potency, but less than that from the third allophanate.
3. M.p. 158-160°. From this allophanate, the alcohol—for which we propose the name α-tocopherol—when given in a single dose of 3 mg. always enables vitamin E-deficient rats to bear young. α-Tocopherol shows a characteristic absoption band at 2980 A., E1 per cent1 cm. = 90 ca. Treatment with methyl alcoholic silver nitrate converts it to a substance which has absorption bands at 2710 and 2620 A respectively, E1 per centcm. = 480 ca., and possesses and some vitamin E activity.
α-Tocopherol yields a crystaline p-nitrophenylurethane melting at 120-131°. Analyses of both the urethane and the allophanate indicate a provisional formula for α-tocopherol of C29H50O2
155 citations
01 Jan 1938
113 citations
95 citations