Natural proteins: Sources, isolation, characterization and applications

Natural peptides and proteins: potent tyrosinase inhibitors

Background and objectives: Tyrosinase is a copper containing oxidase which is crucial for controlling the production of melanin in creatures such as bacteria, fungi, plants and mammals. It is involved in the first two steps of melanin biosynthesis and leads to pigmentation and different types of cancer such as melanoma. Also, it is responsible for browning of fruits and vegetab...

Isolation and FTIR spectroscopy characterization of chitin from local sources

Chitin the second most abundant after cellulose biopolymer found in nature after, is produced by many living organisms, and is present usually in a complex with other polysaccharides and proteins. Chitin was found as a major component in arthropods (insects, crustaceans, arachnids and myriapods), nematodes, algae and fungi. In this study Chitin was isolated from various species (crab, squilla, ...

Isolation and Characterization of Novel Natural Compounds from Myxobacteria

Chrysochromulina spp.: isolation, preliminary characterization and natural abundance

Sixty-four natural virus communities were concentrated from seawater collected from 3 locations in Texas (USA) coastal waters (Gulf of Mexico, 27" 31' N, 96" 18' W; Aransas Pass, 27" 50' N, 97" 02' W; Laguna Madre, 27' 30' N, 97' 18' W) and screened for the presence of lytic pathogens which infect the marine Prymnesiophyte (Haptophyte) Chrysochromuljna brevifilum. Viruses were detected in 16 of...

Characterization of Fe3O4/rGO Composites from Natural Sources: Application for Dyes Color Degradation in Aqueous Solution

The magnetite (Fe3O4) nanoparticle and graphene oxide (GO) have  become interesting materials due to their advanced applications. In this work, we investigated the fabrication of Fe3O4 nanoparticles (NPs) from iron sands and reduced graphene oxide (rGO) NPs from natural graphite. The core-shell fabrication of the Fe3O4/rGO was co...