Plasma polymerization of 1,1,1-trichloroethane yields a coating with robust antibacterial surface properties

RSC Advances ◽  
2014 ◽  
Vol 4 (52) ◽  
pp. 27604-27606 ◽  
Author(s):  
Thomas D. Michl ◽  
Bryan R. Coad ◽  
Michael Doran ◽  
Amanda Hüsler ◽  
Jules D. P. Valentin ◽  
...  
Keyword(s):  
Surface Properties ◽  
Staphylococcus Epidermidis ◽  
Plasma Polymerization ◽  
Antimicrobial Properties ◽  
Surface Coatings ◽  
Antibacterial Surface ◽  
One Step

Novel, highly chlorinated surface coatings were produced via a one-step plasma polymerization (pp) of 1,1,1-trichloroethane (TCE), exhibiting excellent antimicrobial properties against the vigorously biofilm-forming bacterium Staphylococcus epidermidis.

scholarly journals Hybrid Surface Modification of TiO2 Particle by Plasma Polymerization Coating and Surface Properties.

Hyomen Kagaku ◽  
1994 ◽  
Vol 15 (2) ◽  
pp. 106-110 ◽  
Author(s):  
Tatsuhiko IHARA ◽  
Rika OHTO ◽  
Yu IRIYAMA ◽  
Mitsuo KIBOKU
Keyword(s):  
Surface Modification ◽  
Surface Properties ◽  
Plasma Polymerization ◽  
Tio2 Particle

scholarly journals Evaluating the Anti-proliferative Effects of Nanoemulsion Containing Licorice Extract and Lavender Essential Oil on Cancer

2021 ◽  
Vol 24 (1) ◽  
pp. 84-97
Author(s):  
Zohreh Karimi Taheri ◽  
◽  
Mohammad Hosein Aarabi ◽  
Ali Nazari Alam ◽  
Majid Nejati ◽  
...  
Keyword(s):  
Essential Oil ◽  
Cell Lines ◽  
Staphylococcus Epidermidis ◽  
Colorimetric Method ◽  
Antimicrobial Properties ◽  
Antimicrobial Effect ◽  
Drug Formulation ◽  
Study Results ◽  
Licorice Extract

Background and Aim: Despite the anti-cancer and antimicrobial properties of licorice extract and lavender essential oil, some factors, such as low bioavailability and biodegradable, limit their therapeutic use. Using nanoparticles is a method to overcome these restrictions. This study aimed to investigate the anti-proliferative effects of nanoemulsion containing licorice extract and lavender essential oil on cancer cells; we also evaluated its antimicrobial properties in vitro. Methods & Materials: In this experimental study, nanoemulsions, containing licorice extract and lavender essential oil were developed by the spontaneous emulsion method. The anti-proliferative effect of nanoemulsion was investigated using 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) colorimetric method on two cell lines HepG2 and SK-MEL-3. To measure the antimicrobial effect of 4 standard strains of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus epidermidis, and Minimum Inhibitory Concentration (MIC) method was used. Ethical Considerations: This study was approved by the Ethics Committee of Kashan University of Medical Sciences (Code: IR.KAUMS.MEDNT.REC.1396.106). Results: The results of MTT test on HepG2 cells indicated that the concentrations of 630, 1250, and 2500 μg/mL nanoemulsions caused toxicity to the cell and led to the death of >50% of the cells (IC50=401μg/mL; P<0.05). Evaluating SK-MEL3 cells revealed that except for 75 μg of nanoemulsion, other concentrations induced death in >50% of the cells (IC50 = 82 μg/mL; P<0.05). In addition, nanoemulsions, with antimicrobial properties, were studied in 4 strains of bacteria; the highest antimicrobial properties were observed in Staphylococcus epidermidis. Conclusion: Nanoemulsion containing licorice extract and lavender essential oil presents antimicrobial and antiproliferative effects on the two cell lines studied. The current study results indicated that the nano emulsification of lavender essential oil and licorice extract can enhance their biological impact; thus, they can be used as a drug formulation.

Graftfast©: Towards the Control of Surface Properties of any Type of Materials by the Grafting of Polymers

2012 ◽  
Vol 445 ◽  
pp. 797-802 ◽  
Author(s):  
Alice Mesnage ◽  
Pardis Simon ◽  
Guy Deniau ◽  
Nathalie Herlin-Boime ◽  
Serge Palacin
Keyword(s):  
Surface Properties ◽  
Polymer Films ◽  
Atmospheric Pressure ◽  
Room Temperature ◽  
Diazonium Salts ◽  
Green Process ◽  
Graft Polymer ◽  
Grafted Polymer ◽  
Aryl Radicals ◽  
One Step

This document aims at presenting and explaining the mechanism of a simple green process, called Graftfast©, recently developed in order to graft polymer films onto any type of materials. This process is of great interest as it works in a short one step reaction at room temperature, atmospheric pressure in water. Particularly since this method is a redoxinduced process consisting in the reduction of diazonium salts into aryl radicals in presence of vinylic monomer, the involvement of such radicals was investigated. Moreover, this work demonstrates the efficiency of such process for the preparation of functionalized TiO2 nanoparticles. The composition and the grafted polymer quantities were investigated showing the successful grafting of the polymer onto the nanoparticles while conserving their morphology.

scholarly journals ESTUDO FITOQUÍMICO E DE ATIVIDADE ANTIMICROBIANA DE Ptychopetalum olacoides Bentham

2002 ◽  
Vol 3 (2) ◽  
Author(s):  
P. D. MONTRUCCHIO ◽  
O. G. MIGUEL
Keyword(s):  
Escherichia Coli ◽  
Staphylococcus Aureus ◽  
Fusarium Oxysporum ◽  
Staphylococcus Epidermidis ◽  
Antimicrobial Properties ◽  
Colletotrichum Acutatum ◽  
Alcoholic Extract ◽  
Phytochemical Study ◽  
North Brazil ◽  
Long Time

A espécie Ptychopetalum olacoides Bentham, popularmente conhecida como “marapuama” ou “muirapuama”, é uma Olacaceae nativa da região norte do Brasil, há muito conhecida e utilizada por suas propriedades estimulantes e afrodisíacas, sendo inclusive exportada para diversos países. O estudo fitoquímico do lenho desta árvore, neste trabalho representado pelos galhos da planta, revelou a presença majoritária de vários ácidos graxos, esteróides e xantinas, sendo eles: ácido palmítico, ácido esteárico, -sitosterol, estigmasterol, lupeol, glutinol, a-amirina, cafeína, teobromina e adenina, sendo que as três últimas não haviam ainda sido reportadas na espécie. O estudo das atividades antimicrobianas revelou que os extratos da planta não apresentam atividade inibitória sobre o desenvolvimento de cepas de Escherichia coli, Staphylococcus aureus ou Staphylococcus epidermidis. Porém, o resíduo do extrato alcoólico apresenta uma significativa ação inibitória do crescimento micelial de Colletotrichum acutatum, e ação menos pronunciada sobre o crescimento de Fusarium oxysporum. PHYTOCHEMICAL STUDY AND ANTIMICROBIAL ACTIVITY OF Ptychopetalumolacoides Bentham Abstract Ptychopetalum olacoides Bentham, popularly known as “marapuama” or “muirapuama”, is an Olacaceae native from north Brazil, known and used for its stimulating and aphrodisiac properties for a long time, being also exported to several countries all over the world. The phytochemical study of the wood of this tree, represented by its stems, revealed the presence of several fatty acids, sterols and xanthines, including palmitic acid, stearic acid, -sitosterol, stigmasterol, lupeol, glutinol, a-amirin, caffeine, theobromine and adenine, and the latest three substances have not been reported in this specie yet. The study of antimicrobial properties revealed that the plant extracts don’t have any inhibitory activity against strains of Escherichia coli, Staphylococcus aureus or Staphylococcus epidermidis. However, the alcoholic extract residue does have a remarkable inhibitory action on the mycelial growth of Colletotrichum acutatum and Fusarium oxysporum.26

A versatile method for producing functionalized cellulose nanofibers and their application

Nanoscale ◽  
2016 ◽  
Vol 8 (6) ◽  
pp. 3753-3759 ◽  
Author(s):  
Pei Huang ◽  
Yang Zhao ◽  
Shigenori Kuga ◽  
Min Wu ◽  
Yong Huang
Keyword(s):  
Ball Milling ◽  
Surface Properties ◽  
Cellulose Nanofibers ◽  
Cellulose Nanofiber ◽  
One Step

Individual dispersed cellulose nanofibers can be produced through ball milling by adding anhydride and DMAP in one step. By altering the type of anhydride, the cellulose nanofiber presents different surface properties and tailored compatibility with varied solvents or matrices, which greatly promote the massive applications of cellulose nanofibers.

scholarly journals Equilibria in Aqueous Cobalt(II)—Reduced Schiff Base N-(2-hydroxybenzyl)alanine System: Chemical Characterization, Kinetic Analysis, Antimicrobial and Cytotoxic Properties

Molecules ◽  
2020 ◽  
Vol 25 (15) ◽  
pp. 3462
Author(s):  
Magdalena Woźniczka ◽  
Manas Sutradhar ◽  
Armando J. L. Pombeiro ◽  
Mirosława Świątek ◽  
Marek Pająk ◽  
...  
Keyword(s):  
Schiff Base ◽  
Kinetic Analysis ◽  
Staphylococcus Epidermidis ◽  
Antimicrobial Properties ◽  
Chemical Characterization ◽  
Point Of View ◽  
Gram Negative Bacteria ◽  
Gram Positive Bacteria ◽  
Mononuclear Complexes ◽  
Reduced Schiff Base

The present study describes the coordination properties of a reduced Schiff base, N-(2-hydroxybenzyl)alanine, towards cobalt(II) using potentiometric as well as spectroscopic (UV-Vis and ESI-MS) methods. The results indicate the formation of six mononuclear complexes showing high stability in aqueous solution. Coordination occurs in the {O−phenolic,N,O−carboxyl} and {N,O−carboxyl} chelation modes, depending on the degree of ligand deprotonation. Examination of the complexation equilibria at pH ca 7, which is important from a biological point of view, allowed to identify two species: [CoL] and [CoL2H]−. The kinetic analysis showed a structural change of those cobalt(II) complexes from octahedral to tetrahedral in accordance with a first-order time relationship. The antimicrobial properties of N-(2-hydroxybenzyl)alanine, cobalt(II) nitrate and of the Co(II) – ligand complexes were determined against Gram-positive bacteria (Enterococcus faecalis, Staphylococcus aureus, Staphylococcus epidermidis), Gram-negative bacteria (Pseudomonas aeruginosa, Escherichia coli, Helicobacter pylori) and a fungal strain (Candida). The results indicate that the complexes are more active for more strains than the ligand alone. Nevertheless, the complexes induce a higher decrease in the metabolic activity of cells but without damage to nuclei. Tetrahedral structures show stronger anti-cellular toxicity than octahedral complexes, which is most likely due to the higher accessibility of the cobalt(II) center.

Design of polyurethane acrylic antimicrobial films via one-step UV curing

2017 ◽  
Vol 41 (18) ◽  
pp. 9762-9768 ◽  
Author(s):  
Rui Chen ◽  
Ting Li ◽  
Qi Zhang ◽  
Zhongyang Ding ◽  
Piming Ma ◽  
...  
Keyword(s):  
Antimicrobial Properties ◽  
Uv Curing ◽  
Polyurethane Acrylate ◽  
One Step ◽  
Antimicrobial Films

A series of films with excellent antimicrobial properties is prepared from QACs bearing hydrophobic tails and a polyurethane acrylate prepolymer via one-step UV curing.

Photoluminescent and antimicrobial properties of silver‐doped indium hydroxide synthesized by one‐step microwave‐assisted hydrothermal method

2018 ◽  
Vol 16 (2) ◽  
pp. 471-480 ◽  
Author(s):  
Nivaldo Freire Andrade Neto ◽  
Mara T. S. Tavares ◽  
Erik A. C. Ferreira ◽  
Ana I. L. Sales ◽  
Lucymara F. A. Lima ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Antimicrobial Properties ◽  
Indium Hydroxide ◽  
Microwave Assisted ◽  
One Step
Sign in / Sign up

Export Citation Format

Share Document