Cd2+ and Cu2+ removal by the waste of the marine brown macroalga Hydroclathrus clathratus

2019 ◽  
Vol 15 ◽  
pp. 100365 ◽  
Author(s):  
N.K. Soliman ◽  
Hussein S. Mohamed ◽  
Shimaa A. Ahmed ◽  
Fatma H. Sayed ◽  
Ahmed H. Elghandour ◽  
...  
Keyword(s):  
Hydroclathrus Clathratus ◽  
Brown Macroalga

scholarly journals In vitro biological activity of Hydroclathrus clathratus and its use as an extracellular bioreductant for silver nanoparticle formation

2020 ◽  
Vol 9 (1) ◽  
pp. 416-428 ◽  
Author(s):  
Raghad R. Alzahrani ◽  
Manal M. Alkhulaifi ◽  
Nouf M. Al-Enazi
Keyword(s):  
Biological Activity ◽  
Unsaturated Fatty Acids ◽  
Multidrug Resistant ◽  
Chemical Components ◽  
Resistant Bacteria ◽  
Transmission Electron ◽  
Hydroclathrus Clathratus ◽  
Adaptive Nature ◽  
First Time

AbstractThe adaptive nature of algae results in producing unique chemical components that are gaining attention due to their efficiency in many fields and abundance. In this study, we screened the phytochemicals from the brown alga Hydroclathrus clathratus and tested its ability to produce silver nanoparticles (AgNPs) extracellularly for the first time. Lastly, we investigated its biological activity against a variety of bacteria. The biosynthesized nanoparticles were characterized by UV-visible spectroscopy, Fourier-transform infrared spectroscopy, dynamic light scattering, transmission electron microscopy, and energy-dispersive spectroscopy. The biological efficacy of AgNPs was tested against eighteen different bacteria, including seven multidrug-resistant bacteria. Phytochemical screening of the alga revealed the presence of saturated and unsaturated fatty acids, sugars, carboxylic acid derivatives, triterpenoids, steroids, and other components. Formed AgNPs were stable and ranged in size between 7 and 83 nm and presented a variety of shapes. Acinetobacter baumannii, Staphylococcus aureus, Methicillin-resistant S. aureus (MRSA), and MDR A. baumannii were the most affected among the bacteria. The biofilm formation and development assay presented a noteworthy activity against MRSA, with an inhibition percentage of 99%. Acknowledging the future of nano-antibiotics encourages scientists to explore and enhance their potency, notably if they were obtained using green, rapid, and efficient methods.

A concise review of the brown macroalga Ascophyllum nodosum (Linnaeus) Le Jolis

2020 ◽  
Vol 32 (6) ◽  
pp. 3561-3584 ◽  
Author(s):  
Leonel Pereira ◽  
Liam Morrison ◽  
Pushp Sheel Shukla ◽  
Alan T. Critchley
Keyword(s):  
Ascophyllum Nodosum ◽  
Concise Review ◽  
Brown Macroalga

scholarly journals Air-Dried Brown Seaweed, Ascophyllum nodosum, Alters the Rumen Microbiome in a Manner That Changes Rumen Fermentation Profiles and Lowers the Prevalence of Foodborne Pathogens

mSphere ◽  
2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Mi Zhou ◽  
Martin Hünerberg ◽  
Yanhong Chen ◽  
Tim Reuter ◽  
Tim A. McAllister ◽  
...  
Keyword(s):  
Foodborne Pathogens ◽  
Brown Seaweed ◽  
Ascophyllum Nodosum ◽  
Fecal Microbiota ◽  
Rumen Fermentation ◽  
Feed Additive ◽  
E Coli ◽  
Rumen Microbiome ◽  
The Impact ◽  
Brown Macroalga

Maintaining product safety and reducing the carbon footprint of production are two sustainability goals of the livestock industry. The objective of this study was to study the impact of Tasco, a product derived from the brown macroalgaAscophyllum nodosum, on the rumen microbiome and its function. The inclusion of Tasco altered both rumen and fecal microbiota levels without affecting rumen fermentation. Tasco reduced fecalEscherichia colipopulations and specifically reduced the prevalence of Shiga toxin-producingE. coliO45, O103, O111, and O121 in feces. The findings of this study highlight the application of Tasco as a potential feed additive to reduce pathogen shedding in rams without interfering with ruminal metabolism.

scholarly journals Taxonomic reassessment of the Indo-Pacific Scytosiphonaceae (Phaeophyceae): Hydroclathrus rapanuii sp. nov. and Chnoospora minima from Easter Island, with proposal of Dactylosiphon gen. nov. and Pseudochnoospora gen. nov.

2018 ◽  
Vol 61 (1) ◽  
pp. 47-64 ◽  
Author(s):  
Wilfred John E. Santiañez ◽  
Erasmo C. Macaya ◽  
Kyung Min Lee ◽  
Ga Youn Cho ◽  
Sung Min Boo ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Phylogenetic Analyses ◽  
Easter Island ◽  
New Genera ◽  
Monotypic Genus ◽  
Southeastern Pacific ◽  
Molecular Phylogenetic ◽  
Thin Membranes ◽  
Hydroclathrus Clathratus ◽  
Molecular Phylogenetic Data

AbstractA new and putatively endemic species ofHydroclathrus,Hydroclathrus rapanuii, is described from the geographically isolated Easter Island in the southeastern Pacific based on morphological and molecular phylogenetic data. It is distinguished from otherHydroclathrusby thalli of unevenly furrowed thin membranes, and angular, block-like plurangial sori. Our phylogenetic analyses indicated thatH. rapanuiiis closely related to the generitypeHydroclathrus clathratus. We also report on the morphology and phylogeny ofChnoospora minimafrom Easter I. and elsewhere in the Indo-Pacific Ocean, noting the previously unreported presence of hollow portions in its medulla. Although not collected from Easter I., we herein propose the recognition of two new genera,Dactylosiphongen. nov. andPseudochnoosporagen. nov., based on our three-gene phylogeny and their known morphologies and anatomies.Dactylosiphonis based on the three species currently assigned toColpomenia(C. bullosa,C. durvillei, andC. wynnei) that are genetically and morphologically (i.e. thalli with erect and finger-like tubes arising from a common saccate base) distinct from other members ofColpomenia. The monotypic genusPseudochnoosporais represented by the decumbent, branching, and inter-adhesive species currently known asChnoospora implexa. With the above proposals, we further increase the genus-level diversity of Scytosiphonaceae in the Indo-Pacific Ocean.

Sign in / Sign up

Export Citation Format

Share Document