The use of perfluorinated anhydrides coupled with perfluoroalcohols for the derivatization of cannabinoids has been well documented. Derivatization is used in the detection of cannabinoids using gas chromatography-mass spectrometry (GC-MS) with both electron impact ionization (EI) and negative chemical ionization (NCI). During method development for the analysis of cannabinoids in biological sa...

Chemical derivatization of tetrameric concanavalin A (Con A) with succinic anhydride or acetic anhydride converts the protein to a dimeric molecule without altering its carbohydrate-binding specificity. At low concentrations, the dose-response curves for the mitogenic stimulation of mouse spleen cells by native Con A and succinyl-Con A are similar. Above lectin concentrations of 10 ug/ml, howev...

In order to improve the ability of starch absorb menthone, corn was modified by enzymatic treatment (amyloglucosidase and ?-amylase) combined with octenyl succinic anhydride (OSA) esterification. The oil absorption rate followed OSA (P-OSA) reached 101.33%, whereas that samples reverse action sequences (OSA-P) only 59.67%. degree substitution OSA-P also generally lower than P-OSA. At high addit...

In molecular biology, polymerase chain reaction (PCR) has played an important role but suffers a general problem with low efficiency and specificity. Development of suitable additives to improve the PCR specificity and efficiency and the understanding of the PCR enhancing mechanism still remain a great challenge. Here we report the use of polyethyleneimine (PEI)-modified multiwalled carbon nano...

In order to expand application of starch and tung oil, oil anhydride modified potato (TOA starch) was prepared in this work. The structural property, degree substitution, pasting properties, rheological properties emulsifying ability the TOA were investigated. Fourier-transform infrared spectroscopy analysis proved formation starch, substitution 0.021 ± 0.001. Compared with natural its gel, had...

Some 5-aryl-2-mercapto-1,3,4-oxadiazole (I) reacted with maleic anhydride, maleic acid and p-benzoquinone affording 2-(5-aryl-1,3,4-oxadiazol-2-ylthio)succinic anhydrides (II), 2-(5-aryl-1,3,4-oxadiazol-2-ylthio)succinic acids (III) and 2-(2,5-dihydroxyphenylthio)-5-aryl-l,3,4-oxadiazoles (IV), respectively. Treatment of 2-methylthio-5-phenyl-l,3-oxadiazole (V) with amines gives 2-[(alkyl or ar...

The nature of the interaction between dextran sulfate and low density human plasma lipoproteins of the Sr 0 to 10 class (LDL) was investigated by modifying LDL with succinic anhydride or acetic anhydride. In the absence of divalent metal ions, the formation of insoluble and soluble dextran sulfate-LDL complexes was prevented by the acylation of approximately 16% and 25%, respectively, of the LD...

THE TITLE MONOSUCCINATE DERIVATIVE OF MELAMPOMAGNOLIDE B [SYSTEMATIC NAME: 4-(((1aR,7aS,10aS,10bS,E)-1a-methyl-8-meth-yl-ene-9-oxo-1a,2,3,6,7,7a,8,9,10a,10b-deca-hydro-oxireno[2',3':9,10]cyclo-deca-[1,2-b]furan-5-yl)meth-oxy)-4-oxo-butan-oic acid], C19H24O7, was obtained from the reaction of melampomagnolide B with succinic anhydride under nucleophilic addition reaction conditions. The mol-ecul...

A comparative study of three strategies used to synthesize well-defined carboxyl-end-capped polystyrenes is reported. Structural characterization was carried out using a combination of thin-layer chromatography (TLC) and matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS). For the reaction of polystyryl anions with 4-bromo-1,1,1-trimethoxybutane, in addit...

Fourier transform infrared photoacoustic spectroscopy (FTIR-PAS) qualitatively and quantitatively measured resistant starch (RS) in rat cecal contents. Fisher 344 rats were fed diets of 55% (w/w, dry basis) starch for 8 weeks. Cecal contents were collected from sacrificed rats. A corn starch control was compared against three RS diets. The RS diets were high-amylose corn starch (HA7), HA7 chemi...