Positively charged graphene oxide nanoparticle: precisely label the plasma membrane of live cell and sensitively monitor extracellular pH in situ

2014 ◽  
Vol 50 (28) ◽  
pp. 3695-3698 ◽  
Author(s):  
Huarui Zhu ◽  
Liang Gao ◽  
Xinglu Jiang ◽  
Ru Liu ◽  
Yueteng Wei ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Plasma Membrane ◽  
Positive Charge ◽  
Extracellular Ph ◽  
Live Cells ◽  
Oxide Nanoparticles ◽  
Ph Variation ◽  
Oxide Nanoparticle ◽  
Positively Charged

Graphene oxide nanoparticles with positive charge can be developed as fluorescent nanoprobes to detect extracellular pH variation of live cells.

Positive charge modifications alter the ability of XIP to inhibit the plasma membrane calcium pump

1996 ◽  
Vol 271 (3) ◽  
pp. C736-C741 ◽  
Author(s):  
W. Xu ◽  
C. Gatto ◽  
M. A. Milanick
Keyword(s):  
Plasma Membrane ◽  
Positive Charge ◽  
Calcium Pump ◽  
Inhibitory Peptide ◽  
Ca Pump ◽  
Contact Points ◽  
Plasma Membrane Calcium Pump ◽  
Peptide Analogues ◽  
Positively Charged

Exchange inhibitory peptide (XIP; RRLLFYKYVYKRYRAGKQRG) is the shortest peptide that inhibits the plasma membrane Ca pump at high Ca (A. Enyedi, T. Vorherr, P. James, D. J. McCormick, A. G. Filoteo, E. Carafoli, and J. T. Penniston, J. Biol. Chem. 264: 12313-12321, 1989). Sulfosuccinimidyl acetate (SNA)-modified XIP does not inhibit the Ca pump; SNA neutralizes the positive charge on Lys at positions 7, 11, and 17. Peptide 2CK-XIP (RRLLFYRYVYRCYCAGRQKG) inhibits the pump, but the iodoacetamido-modified peptide does not inhibit. Three peptide analogues, in which 7, 11, and 17 were Ala, Cys, or Lys, inhibited about as well as XIP. SNA modification of these analogues (each with 1 Lys) did not inhibit. SNA modification of 2CK-XIP results in a peptide that does not inhibit; thus position 19 is important. Our results suggest that it is critical that position 19 be positively charged, that positions 7, 11, and 17 are important contact points between XIP and the Ca pump (with at least one positively charged), and that, whereas it is not essential that residues 12 and 14 be positive, they cannot be negative.

The fabrication of dendrimeric phenylboronic acid-functionalized magnetic graphene oxide nanoparticles with excellent adsorption performance for the separation and purification of horseradish peroxidase

2020 ◽  
Vol 44 (14) ◽  
pp. 5254-5264
Author(s):  
Youyuan Xing ◽  
Juan Han ◽  
Lei Wang ◽  
Chunmei Li ◽  
Jiacong Wu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Horseradish Peroxidase ◽  
Phenylboronic Acid ◽  
Oxide Nanoparticles ◽  
Separation And Purification ◽  
Magnetic Graphene Oxide ◽  
Adsorption Performance ◽  
Magnetic Graphene ◽  
Oxide Nanoparticle

A dendrimeric phenylboronic acid-affinitive magnetic graphene oxide nanoparticle was synthesized and used to separate and purify HRP.

Electrochemical biosensor with graphene oxide nanoparticles and polypyrrole interface for the detection of bilirubin

RSC Advances ◽  
2016 ◽  
Vol 6 (68) ◽  
pp. 63624-63633 ◽  
Author(s):  
N. Chauhan ◽  
R. Rawal ◽  
V. Hooda ◽  
U. Jain
Keyword(s):  
Graphene Oxide ◽  
Tin Oxide ◽  
Electrochemical Biosensor ◽  
Glass Plate ◽  
Oxide Nanoparticles ◽  
Bilirubin Oxidase ◽  
Electrochemically Deposited ◽  
Oxide Nanoparticle ◽  
Fto Glass

A bilirubin biosensor was fabricated by immobilization of bilirubin oxidase (BOx) on a graphene oxide nanoparticle (GONP) decorated polypyrrole (Ppy) layer electrochemically deposited onto a fluorine doped tin oxide (FTO) glass plate.

scholarly journals In situ mass change and gas analysis of 3D manganese oxide/graphene aerogel for supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (49) ◽  
pp. 28569-28575 ◽  
Author(s):  
Phansiri Suktha ◽  
Poramane Chiochan ◽  
Atiweena Krittayavathananon ◽  
Sangchai Sarawutanukul ◽  
Sathyamoorthi Sethuraman ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Manganese Oxide ◽  
Reduced Graphene Oxide ◽  
Reduction Process ◽  
Gas Analysis ◽  
Oxide Nanoparticles ◽  
Graphene Aerogel ◽  
Manganese Oxide Nanoparticles ◽  
Reduced Graphene

Manganese oxide nanoparticles decorated on 3D reduced graphene oxide aerogels (3D MnOx/rGOae) for neutral electrochemical capacitors were successfully produced by a rapid microwave reduction process within 20 s.

Ethylene diamine mediated cobalt nanoparticle studded graphene oxide quantum dots with tunable photoluminescence properties

RSC Advances ◽  
2016 ◽  
Vol 6 (71) ◽  
pp. 67102-67112 ◽  
Author(s):  
Upama Baruah ◽  
Devasish Chowdhury
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Ethylene Diamine ◽  
Oxide Nanoparticles ◽  
Photoluminescence Properties ◽  
Cobalt Oxide Nanoparticles ◽  
Fluorescence Switching ◽  
Graphene Oxide Quantum Dots ◽  
Cobalt Nanoparticle

The present study demonstrates ethylene diamine mediated in situ synthesis of cobalt oxide nanoparticles (Co3O4NPs) studded on graphene oxide quantum dots (GOQDs) showing reversible on/off fluorescence switching.

Synthesis of N-doped graphene-functionalized Zn1.231Ge0.689N1.218O0.782 solid solution as a photocatalyst for CO2 reduction and oxidation of benzyl alcohol under visible-light irradiation

2017 ◽  
Vol 5 (22) ◽  
pp. 10998-11008 ◽  
Author(s):  
Jun Liang ◽  
Li Li
Keyword(s):  
Solid Solution ◽  
Graphene Oxide ◽  
High Temperature ◽  
Visible Light Irradiation ◽  
Co2 Reduction ◽  
Electrostatic Adsorption ◽  
Doped Graphene ◽  
Reduction And Oxidation ◽  
Positively Charged

N-Graphene/ZnGeON hybrids were assembled through electrostatic adsorption of positively-charged Zn2GeO4 nanorods with negatively-charged graphene oxide (GO) and calcinated by a high temperature in situ nitridation technique under NH3 flow.

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