نتایج جستجو برای: isolation and structure elucidation
تعداد نتایج: 16988364 فیلتر نتایج به سال:
Very recently, ToMITA and coworkers' 2) have reported the fermentation, isolation and structure elucidation of gilvocarcins V (1) and M (2). They note that I was previously described under the name of toromycin by HORII et al.3) although the structure of toromycin was not elucidated. Recently we have isolated 1 and 2 and a related compound gilvocarcin E (3) from a culture of Streptomyces anandi...
asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...
Sixteen carotenoids were isolated from the flesh of Brazilian red guavas (Psidium guajava L.). Their structures were established by means of UV-visible, 400 and 500 MHz (1)H NMR, 120 and 125 MHz (13)C NMR, mass, and circular dichroism spectra. The carotenoids were identified as phytofluene, (all-E)-, (9Z)-, (13Z)-, and (15Z)-beta-carotene, (all-E)-gamma-carotene, (all-E)-, (9Z)-, (13Z)-, and (1...
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