The structure‐activity mechanism of the changes in the physicochemical properties of Flammulina velutipes polysaccharides during ultrasonic extraction

2021 ◽  
Author(s):  
Xin Chen ◽  
Liyan Zhao ◽  
Qiuhui Hu ◽  
Jinrong Xiao ◽  
Benard Muinde Kimatu ◽  
...  
Keyword(s):  
Physicochemical Properties ◽  
Ultrasonic Extraction ◽  
Flammulina Velutipes ◽  
Structure Activity ◽  
Activity Mechanism

Ultrasonic extraction optimization of L. macranthoides polysaccharides and its physicochemical properties

2015 ◽  
Vol 74 ◽  
pp. 224-231 ◽  
Author(s):  
Zhen Wu ◽  
Hong Li ◽  
Yong Yang ◽  
Hongjun Tan
Keyword(s):  
Physicochemical Properties ◽  
Ultrasonic Extraction ◽  
Extraction Optimization

scholarly journals Controlling Nanoemulsion Surface Chemistry with Poly(2-Oxazoline) Amphiphiles

2018 ◽  
Author(s):  
Daniel A. Estabrook ◽  
Amanda F. Ennis ◽  
Rachael Day ◽  
Ellen Sletten
Keyword(s):  
Block Copolymers ◽  
Surface Chemistry ◽  
Physicochemical Properties ◽  
Cellular Uptake ◽  
Surface Functionalization ◽  
Covalent Modification ◽  
Dynamic Materials ◽  
Structure Activity ◽  
Modified Surface ◽  
Surface Chemistries

Emulsions are dynamic materials that have been extensively employed within pharmaceutical, food and cosmetics industries. However, their use beyond conventional applications has been hindered by difficulties in surface functionalization, and an inability to selectively control physicochemical properties. Here, we employ custom poly(2-oxazoline) block copolymers to overcome these limitations. We demonstrate that poly(2-oxazoline) copolymers can effectively stabilize nanoscale droplets of hydrocarbon and perfluorocarbon in water. The living polymerization allows for the incorporation of chemical handles into the surfactants such that covalent modification of the emulsion surfaces can be performed. Through post-emulsion modification, we are able to access nanoemulsions with modified surface chemistries, yet consistent sizes. By decoupling size and surface charge, we explore structure-activity relationships involving the cellular uptake of nanoemulsions.

Effect of physicochemical properties of ammonium-based ionic liquids on CO2 capturing: An insight into structure-activity relationship

2020 ◽  
Vol 510 ◽  
pp. 112484 ◽  
Author(s):  
Sabahat Sardar ◽  
Asad Mumtaz ◽  
Mehwish Taneez ◽  
Masoom Yasinzai ◽  
Muhammad Imran Irshad ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Physicochemical Properties ◽  
Structure Activity Relationship ◽  
Activity Relationship ◽  
Structure Activity ◽  
Co2 Capturing ◽  
Insight Into

scholarly journals Characterization and Antioxidant Activities of Yellow Strain Flammulina velutipes (Jinhua Mushroom) Polysaccharides and Their Effects on ROS Content in L929 Cell

Antioxidants ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 298 ◽  
Author(s):  
Yu-Ning Hu ◽  
Tzu-Jung Sung ◽  
Chun-Hsu Chou ◽  
Kai-Lun Liu ◽  
Liang-Po Hsieh ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Physicochemical Properties ◽  
Antioxidant Activities ◽  
L929 Cell ◽  
Fluorescein Diacetate ◽  
Flammulina Velutipes ◽  
Oxygen Species ◽  
Biological Functions ◽  
Fractional Precipitation ◽  
Yellow Strain

Yellow strain Flammulina velutipes, which is known as Jinhua mushroom in Taiwan, has become popular among customers due to its distinct texture that is utterly different from white strain F. velutipes. However, there has been little study on the physicochemical properties, antioxidant activities, and biological functions of yellow strain F. velutipes polysaccharides (FVYs). The specific aims of this study are to evaluate and compare the physicochemical properties, antioxidant activities, and biological functions of FVYs and white strain F. velutipes polysaccharides (FVWs) in order to select the strain appropriate for cosmetic ingredient. The FVYs and FVWs were prepared by fractional precipitation (40%, 60%, and 80%). According to the results, FVY-80 showed the greatest antioxidant activities based on 2,2-diphenyl-1-picrylhydrazyl (DPPH) (IC50 = 2.22 mg/mL) and 2,2’ -azino-bis-3-ethylbenzthiazoline-6-sulphonic acid (ABTS) radical assay (IC50 = 2.04 mg/mL). None of the fractions exhibited cytotoxicity toward L929 cell under a concentration of 500 μ g/mL. FVY-80 significantly reduced the reactive oxygen species (ROS) content in L929 cell by 55.96%, as compared with the H2O2-induced L929 cell, according to the dichloro-dihydro-fluorescein diacetate (DCFH-DA) assay. In conclusion, we suggest that FVY-80 is the best source for a cosmetics ingredient.

Host-defense peptides of Australian anurans. Part 2. Structure, activity, mechanism of action, and evolutionary significance

Peptides ◽  
2012 ◽  
Vol 37 (1) ◽  
pp. 174-188 ◽  
Author(s):  
John H. Bowie ◽  
Frances Separovic ◽  
Michael J. Tyler
Keyword(s):  
Host Defense ◽  
Mechanism Of Action ◽  
Evolutionary Significance ◽  
Host Defense Peptides ◽  
Structure Activity ◽  
Defense Peptides ◽  
Activity Mechanism

Structure‐activity relationships between antibacterial activities and physicochemical properties of sulfonamides

1997 ◽  
Vol 20 (4) ◽  
pp. 276-283 ◽  
Author(s):  
M.J.B. Mengelers ◽  
P.E. Hougee ◽  
L.H.M. Janssen ◽  
A.S.J.P.A.M. Van Miert
Keyword(s):  
Physicochemical Properties ◽  
Antibacterial Activities ◽  
Structure Activity Relationships ◽  
Structure Activity

Exploring the usefulness of key green physicochemical properties: Quantitative structure-activity relationship for solvents from biomass

2018 ◽  
Vol 37 (4) ◽  
pp. 1014-1023 ◽  
Author(s):  
Estefanía Zuriaga ◽  
Beatriz Giner ◽  
María Pilar Ribate ◽  
Cristina B. García ◽  
Laura Lomba
Keyword(s):  
Physicochemical Properties ◽  
Quantitative Structure Activity Relationship ◽  
Structure Activity Relationship ◽  
Activity Relationship ◽  
Quantitative Structure ◽  
Structure Activity
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