Machining features and algorithms for set-up planning and fixture design

In this research, the approaches of machining feature-based design and precedence matrix algorithm are combined to automate the process planning task and to generate the machining groups for set-ups, The objective of the presented algorithm is overcome the shortcomings of existing CAPP systems, Parts are described in terms of machining features which consist of geometric and non-geometric information linked to design and manufacturing, Machining feature based-design provides the component description to the process planning which consists of attributes required for automation

Saponins from Cephalaria aristata C. Koch

WOS: 000343058200003One new oleanane-type saponin, 3-O-beta-D-glucopyranosyl-(1 -> 4)-beta-D-xylopyranosyl-(1 -> 3)-alpha-D-rhamnopyranosyl-(1 -> 2)-alpha-L-arabinopyranosylhederagenin 28-O-beta-D-glucopyranosyl-(1 -> 6)-beta-D-glucopyranosyl ester (1) was isolated from the MeOH extract of whole plant parts of Cephalaria aristata C. Koch along with three known oleanane-type saponins, 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-alpha-L-arabinopyranosyl hederagenin 28-O-(beta-D-glucopyranosyl-(1 -> 6)-beta-D-glucopyranosyl) ester (2), 3-O-beta-D-glucopyranosyl-(1 -> 4)-beta-D-xylopyranosyl-(1 -> 3)-alpha-L-rhamnopyranosyl-(1 -> 2)-alpha-L-arabinopyranosyl hederagenin (3) and 3-O-alpha-L-rhamnopyranosyl-(1 -> 2)-alpha-L-arabinopyranosylhederagenin (4). Also three triterpenoids and a steroid glucoside oleanolic acid (5), beta-amyrin (6), 20-beta-hydroxyursolic acid (7) and 29-hydroxystigmast-5-en-3-O-beta-D-glucopyranoside (8). Their structures were established by the extensive use of 1D-and 2D-NMR experiments along with ESIMS and HRMS analysis

Monoterpenoid glucoindole alkaloids and iridoids from Pterocephalus pinardii

PubMed ID: 20049748A new secondary metabolite, pterocephaline, along with the known cantleyoside, 7´-morroniside, 3ß,5´-tetrahydrodesoxycordifoline lactam, 5S-5-carboxyvincoside, sweroside, and loganin have been isolated from the aerial parts of P. pinardii (Dipsacaceae). Moreover, cantleyoside-methyl- hemiacetal and cantleyoside-dimethyl-acetal were obtained as seco-iridoid artifacts. The structures were elucidated by extensive spectroscopic methods including 1D-(1H, 13C and TOCSY) and 2D-NMR(DQF-COSY, HSQC and HMBC). Monoterpenoid glucoindole alkaloids were encountered for the first time in Dipsacaceae family. Copyright © 2010 John Wiley & Sons, Ltd