Conduct of Amino Acids in Synthetic Ion Exchangers

Englis, D. T.; Fiess, Harold A.

doi:10.1021/ie50415a003

Cited by 30 publications

(4 citation statements)

References 3 publications

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“…The absorbed T.E.T. was then determined quantitatively in the laboratory with the amine test reaction using I : 2-naphthoquinone-4-sulphonic acid according to the method of Englis and Fiess (1944).…”

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confidence: 99%

The Danger of Dermatoses Due to Cold-setting Ethoxyline Resins (Epoxide Resins)

Grandjean¹

1957

Occupational and Environmental Medicine

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A new group of synthetic resins (the ethoxyline or epoxide resins) has been widely accepted in industry during the last few years. These resins, thanks to their novel properties as adhesives and casting resins, are used in the modern manufacture of various kinds of apparatus, of electrical equipment, of automobiles, and of aircraft. They are usually supplied in the form of two reactive components, resin and hardener.The cold-setting casting resins occupy a special position among the ethoxyline resins, most of which are aliphatic-aromaticpolyetherscontaining hydroxyl and terminal epoxy groups. The highly reactive hardeners employed are usually polyamines. Mixtures of these two are capable of transformation at room temperature into solid, infusible substances. In practice, the ethoxyline resin is mixed with the polyamine hardener in the ratio of about 10 :1 immediately before use and then applied to the desired point of the material by casting or brushing or injecting.The ethoxyline resins were introduced under the general term " epoxide or epoxy " resins, being offered under the trademarks "epon" or "araldite" casting resin. As is well known, both manufacturers and users of lacquers are familiar with the handling of dangerous substances and apply comprehensive protective measures; as a result few or no dermatoses have appeared in lacquer factories till now. Dermatoses were reported in the U.S.A. too after these products had been found useful in various industries as adhesives and casting resins.The introduction of ethoxyline resins into works hitherto unfamiliar with chemical processes brought the operatives into contact for the first time with substances which carried an unknown risk to the skin. Therefore, the first extensive " epidemics " of skin eruptions appeared mainly in such " nonchemical" factories.The first observations of skin irritation during work with such resins were reported by Pletscher, 1 Schuppli, and Reipert (1954). Six out of 20 operatives working with " araldite " casting resin D suffered from severe eczema, eight exhibited only slight, temporary epidermal irritation, and the rest remained free of symptoms. Since the epidermal symptoms were apparently of an allergic nature, the 20 operatives were patch-tested for epidermal sensitivity to " araldite " casting resin D, hardener 951 (triethylenetetramine), and various other substances. These tests showed that out of the 14 workmen suffering from epidermal reactions, four were hypersensitive to " araldite " casting resin D, two to hardener 951, and three to both substances. The men free from symptoms exhibited no hypersensitivity. On the basis of their observations, the authors concluded that contact with " araldite " casting resin D and hardener 951 can lead to allergic epidermal eczema. The present paper describes our investigations in 11 factories in four European countries (mainly in electrical engineering) using these substances.Atmospheric Pollution by Vapours of Triethylenetetramine Araldite resins are practically non-volatile and are the...

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confidence: 99%

The Danger of Dermatoses Due to Cold-setting Ethoxyline Resins (Epoxide Resins)

Grandjean¹

1957

Occupational and Environmental Medicine

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“…From the basic nature of urea, creatine, and creatinine the adsorption mechanism should be similar to that for the amino acids as explained by Englis and Fiess (7).…”

Section: Industrial and Engineering Chemistrymentioning

confidence: 78%

Action of Mineral Ion Exchange Resins on Milk Constituents

Gehrke¹,

Almy²

1950

Ind. Eng. Chem.

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“…190-4, New York, Interscience Publishers, 1944. THIS study was made in connection with a survey of methods that might be used for the estimation of individual amino acids or their mixtures in chromatographic studies. The original procedure of Folin (5) and the subsequently modified form of the procedure by Englis and Fiess (4) were the basis of the present work. This colorimetric process offers advantages for routine work and it is based upon the reaction between an amino acid and sodium-2-naphthoquinone-4-sulfonate, the product being in each case a highly colored compound: R-ÓH C'OOH Study for Glycine from 400 to 600 µ Volumes in all eases 50 ml.…”

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confidence: 99%