Black carrot polyphenols: effect of processing,storage and digestion—an overview

Black carrots represent a valuable source of polyphenols, in particular anthocyanins and phenolic acids, and has attracted the attention of the scientific community especially due to the unique profile of anthocyanin compounds, which are well distinguished for their role in health promotion and prevention of chronic diseases. Black carrots are often not consumed as such, instead they are processed into other products. In general, processed products of black carrot are stored for long term and the polyphenols are susceptible to degradation during storage. In addition, it is also important to determine how the digestion process affects polyphenols as this will, in turn, affect their bioavailability. Accordingly, the potential health-promoting effects of black carrot polyphenols depend on their processing history and their stability during storage as well as their absorption in the gastrointestinal tract. In this perspective, this review provides an overview of the findings on the effects of processing, storage and digestion on black carrot polyphenols.     

Understanding the chemistry of the artificial electron acceptors PES,PMS, DCPIP and Wurster’s Blue in methanol dehydrogenase assays

JBIC Journal of Biological Inorganic Chemistry - Methanol dehydrogenases (MDH) have recently taken the spotlight with the discovery that a large portion of these enzymes in nature utilize...     

ULTRASTRUCTURAL ALTERATIONS IN OAK LEAVES PARASITIZED BY TAPHRINA CAERULESCENS

Leaves of Quercus velutina Lam. parasitized by Taphrina caerulescens (Desm.) Tulanse were examined with the electron microscope to ascertain cellular aberrations that were induced by the fungus. Major changes were most apparent in the lower epidermis, where cellular divisions and enlargement were common, the cell walls becoming irregularly thickened. Many of the ultrastructural features of the diseased cells resembled those of meristematic cells; the absence of a large central vacuole, a disproportionately large nucleus, and an abundance of cytoplasmic organelles. Chloroplasts with large amounts of starch were also routinely observed.