autoclave d dry gr ound beans and ethanol ext r acted g round beans which con t a i n t wo-thi r d of t he haemagglutinin , and one-quarter o f the t rypsin i nhibitors with 80% o f its origi nal t annin we re f ed t o rat s for determinati on the nitr ogen digestibi l i ty . the toxic f act or s of bea n s k i l led all the a nimals be fore t he complet ion o f t he 10- day per iod ass ay . fe...

Plants of the genus Euphorbia have been investigated for different bioactive natural products. I have isolated several new and bioactive diterpenoids from different species of Euphorbia of Iran with myrsinane type skeleton. The structure of the compounds was determined using high resolution mass spectroscopy, 1 D and 2 D NMR spectral data. The stereochemistry of the diterpenoids was determined ...

ethanolic crude extract of i. imbricata lindl. (iridaceae) was subjected to column chromatography on silica gel with varying portions of meoh: chcl3. nigicin (irisolone) was isolated and its identification carried out by ir, uv, ms, 1-d and 2-d nmr spectroscopy.

Two bichromophoric systems are presented that contain an N-alkylnaphthalimide electron acceptor and a 4-methoxyaniline (3a) or an aniline (3b) electron donor, respectively. Upon photoexcitation of 3a in cyclohexane electron transfer occurs in the singlet manifold to afford the short-lived (τf ) 0.75 ns) 1(D+-A-) state in ca. 70% yield. An important decay pathway of this D+-Astate consists of in...

The characterization of the binding of reducing carbohydrates present as mixtures of anomers in solution to a sugar recepor (lectin) poses severe difficulties. In this situation, NMR spectroscopy enables the observation of signals for each anomer in the mixture by applying approaches based on ligand observation. Saturation transfer difference (STD) NMR allows fast and efficient screening of com...