Cyclodysidins A–D, cyclic lipopeptides from the marine sponge-derived Streptomyces strain RV15
摘要:
Four new cyclic lipopeptides, cyclo-(AFA-Ser-Gln-Asn-Tyr-Asn-Ser-Thr), named cyclodysidins A-D, were isolated from the broth culture of Streptomyces strain RV15 associated with the marine sponge Dysidea tupha. The sequences of the amino acid building blocks in the compounds and their structures were determined by 1D- and 2D-NMR techniques and CID-MS/MS experiments. The absolute configurations of all alpha-amino acids were determined by HPLC analysis after derivatization with Marfey's reagent and comparison with commercially available reference samples, while those two of the beta-amino fatty acids were determined by using racemic and enantiopure reference samples synthetically prepared. (C) 2011 Elsevier Ltd. All rights reserved.
[EN] COAT FIBER AND METHOD<br/>[FR] FIBRE REVÊTUE ET PROCÉDÉ
申请人:BASF SE
公开号:WO2018166823A1
公开(公告)日:2018-09-20
A coated fiber for polymer reinforcement is disclosed. The coated fiber comprises a fiber and a coating disposed about said fiber. The fiber has a denier of from about 250 to about 3,000. The coating comprises a branched polyethylene imine. The fiber is present in the coated fiber in an amount of from about 80 to about 99.8 percent by weight and the coating is present in the coated fiber in an amount of from about 0.2 to about 20 percent by weight, with percent by weight based on the total weight of the coated fiber. A method of producing the coated fiber is also disclosed.
Cyclodysidins A–D, cyclic lipopeptides from the marine sponge-derived Streptomyces strain RV15
Four new cyclic lipopeptides, cyclo-(AFA-Ser-Gln-Asn-Tyr-Asn-Ser-Thr), named cyclodysidins A-D, were isolated from the broth culture of Streptomyces strain RV15 associated with the marine sponge Dysidea tupha. The sequences of the amino acid building blocks in the compounds and their structures were determined by 1D- and 2D-NMR techniques and CID-MS/MS experiments. The absolute configurations of all alpha-amino acids were determined by HPLC analysis after derivatization with Marfey's reagent and comparison with commercially available reference samples, while those two of the beta-amino fatty acids were determined by using racemic and enantiopure reference samples synthetically prepared. (C) 2011 Elsevier Ltd. All rights reserved.