A survey was carried out of a population of workers exposed to tetrachlorophthalic anhydride, an acid anhydride epoxy resin curing agent known to cause asthma. Using a radioallergosorbent test with a tetrachlorophthalic anhydride human serum albumin conjugate, specific IgE antibody was detected in serum from 24 out of 300 factory floor workers exposed to tetrachlorophthalic anhydride. Of these ...

An exothermic reaction, leading to 3-(2-furyl)acrylic anhydride and a little amount of furfurylideneacetone is taking place when reacting 3-(2-furyl)acrylic acid in acetic anhydride above 120°C. The 3-(5-acetyl-2-furyl)acrylic acid was formed under the afore-mentioned conditions only in the presence of H 3 P 0 4 . The 3-(2-furyl)acrylic anhydride is more stable towards HNO, at temperatures unde...

Résumé en anglais This paper presents some investigations on the properties of guanine (G) and cytosine (C) based heterostructures deposited on flexible substrates. The effects of two types of maleic anhydride–aniline derivatives (maleic anhydride-cyano aniline or maleic anhydride-2,4 dinitroaniline) buffer layer, deposited between indium tin oxide and (G) or (C) layer, on the optical and elect...

Esterified kraft lignins (KL) were prepared by reaction with maleic anhydride (MA), succinic anhydride (SA), and phthalic anhydride (PA) in acetone solutions. The esterified lignins were characterized using ATRFTIR, solid state CP-MAS 13C NMR spectroscopy, thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). PA modification resulted in the highest weight gain percent (...

This study includs the synthesis of some new Amic acid and Imides,starting from esters [S1] Terephthalic which then converted toits hydrazide [S2] to amic derivatives [S3-S7] finally withimides [S8-S12]. Preparing ester by usual esterification ofterephthalic with absolute ethanol in acidic medium, hasconverted its reacting it hydrazine hydrate. Theamic have been synthesized reaction ofhydrazide...

Butler, Harris, Hartley & Leberman (1967) showed that maleic anhydride could be used for the reversible blocking of amino groups. The maleyl group could be removed because the protonated form of the free carboxyl group catalysed the hydrolysis of the amide bond, presumably by intramolecular general acid catalysis (cf. Bender, Chow & Chloupek, 1958). The present paper reports the effects of intr...

THE TITLE COMPOUND [SYSTEMATIC NAME: 2-(4a,8-dimethyl-1,2,3,4,4a,5,6,8a-octa-hydro-naphthalen-2-yl)acrylic acid anhydride], C(30)H(42)O(3), is a new isocostic anhydride which was synthesized from the aerial part of Inula Viscosa- (L) Aiton [or Dittrichia Viscosa- (L) Greuter]. The mol-ecule adopts an essentially linear shape with two terminal fused-rings bridged by the anhydride group. The exte...