UNLABELLED BACKGROUND Biotransformation by using microbial and plant cell cultures has been applied effectively for the production of fine chemicals on large scale. Inspired by the wealth of literature available on the biotransformation of steroids, we decided to investigate the biotransformation of ethynodiol diacetate (1) by using plant and microbial cultures. RESULTS The biotransformati...

OBJECTIVES Reduction in faecal shedding of Shiga toxin-producing enterohaemorrhagic Escherichia coli (EHEC) in food-producing animals is a viable strategy to minimize human disease initiated by exposure to these microorganisms. To this end, an intervention strategy involving the electrostatic hybridization of two commonly used anti-infective agents for veterinary practice (i.e. chlorhexidine an...

THE STRUCTURE OF THE TITLE STEROID [ALTERNATIVE NAME: 3β,6β-diacet-oxy-5β-methyl-19-norcholest-9(10)-ene], C31H50O4, confirms the generally accepted mechanism for the rearrangement of a cholestan-5α-ol derivative reported a century ago by Westphalen. The methyl group at position 10 of the starting material migrates to position 5 in the steroidal nucleus, while a Δ(9) bond is formed, as indicate...

As part of our search for bioactive compounds from plant biodiversity, 29 withanolides (1, 3-6, 9, 12-18, and 20-35) were recently isolated from three members of the Solanaceae: Physalis longifolia, Vassobia breviflora, and Withania somnifera. Six derivatives (2, 7, 8, 10, 11, and 19) were prepared from these naturally occurring withanolides. All compounds (1-35) were evaluated for in vitro ant...

Abstract Cellulose acetate with a degree of substitution (DS) 2.5, commonly referred to as cellulose diacetate, has been discussed an important source microplastic in the environment, especially since it is used produce cigarette filters. According EU Single-Use Plastics Directive tobacco products are one ten most found SUP beach litter by number. However, at present only very few biodegradatio...

In the polymeric title complex, [Zn(C(10)H(8)O(4)S(2))(C(10)H(8)N(2))(H(2)O)(2)](n), the Zn(2+) ion lies on a twofold rotation axis and exhibits an octa-hedral environment, in which it is coordinated by two trans O atoms from two symmetry-related 2,2'-[1,4-phenyl-enebis(sulfanedi-yl)]diacetate anions, two N atoms from one 2,2'-bipyridine ligand, and two cis O atoms from water mol-ecules. The di...

Fluorescein-based sensors are the most widely applied class of zinc probes but display adventitious localization in live cells. We present here a peptide-based localization strategy that affords precision in targeting of fluorescein-based zinc sensors. By appending the zinc-selective, reaction-based probe Zinpyr-1 diacetate (DA-ZP1) to the N-terminus of two different targeting peptides we achie...