Mechanically Robust, Self-Healing, Polymer Blends and Polymer/Small Molecule Blend Materials with High Antibacterial Activity

2020 ◽  
Vol 12 (24) ◽  
pp. 26966-26972 ◽  
Author(s):  
Juan Du ◽  
Yangyang Li ◽  
Jiuchun Wang ◽  
Caiyun Wang ◽  
Danqing Liu ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Polymer Blends ◽  
Small Molecule ◽  
Self Healing ◽  
High Antibacterial Activity

Phytochemical Evaluation and Screening of Cardiotonic, Antibacterial and Anthelmintic Activities of Sida cordifolia L.

2014 ◽  
Vol 7 (3) ◽  
pp. 2567-2573
Author(s):  
Sarella Prakash Nathaniel Kumar ◽  
Kanthal L.K. ◽  
Durga S ◽  
Achutha Rama Raju D ◽  
Satyavati K
Keyword(s):  
Antibacterial Activity ◽  
Rural Areas ◽  
Anthelmintic Activity ◽  
Diffusion Method ◽  
Frog Heart ◽  
Aqueous Extracts ◽  
Cardiotonic Activity ◽  
Herbal Products ◽  
High Antibacterial Activity ◽  
Sida Cordifolia

Several herbs are traditionally used in the treatment of a variety of ailments particularly in the rural areas, where herbal medicine is mainly the source of health care system. Many of these herbs havenot been assessed for safety or toxicity to tissue or organs of the mammalian recipients. An attempt is made to prove the efficacy of Sida cordifolia Linn., (a traditional medicinal plant chosen on the basis of ethnomedical knowledge) for its Cardiotonic, Antibacterial and Anthelmintic activities. Sida cordofolia Linn., is used traditionally, inter alia, in the treatment of various infections, asthma, diarrhoea, heart and stomach disorders. Cardiotonicactivity is performed using isolated Frog Heart Perfusion Technique. Antibacterial activity of the whole plant extracts were assessed by Agar well diffusion method against the strains of Bacillus subtilis, Escherichia coli, and Staphylococcus aureus. Anthelmintic activity was studied against Pheretima posthuma. Phytochemical screening of powdered plant material revealed thepresence of some secondary metabolites such as alkaloids, saponins, tannins, glycosides and flavonoids. Results indicated that methanol, chloroform, aqueous extracts have significant cardiotonic activity but less than standard drugs. Methanol and Aqueous extracts showed high antibacterial activity and anthelmintic activity than the standard drugs. In a nutshell, we can conclude that the methanol and aqueous fractions of Sida cordifolia Linn., had a profound antibacterial and anthelmintic effect eventhough it possessed very significant cardiotonic activity. This validates its continuous usage in ethnomedicine. This plant could be developed into cheap, safe and culturally acceptable standardized herbal products and may serve as asource of new molecules for broad-spectrum antimicrobial and anthelmintic agent.

A self-healable, stretchable, tear-resistant and sticky elastomer enabled by a facile polymer blends strategy

2021 ◽  
Vol 9 (7) ◽  
pp. 3931-3939
Author(s):  
Shiqiang Song ◽  
Honghao Hou ◽  
Jincheng Wang ◽  
Pinhua Rao ◽  
Yong Zhang
Keyword(s):  
Polymer Blends ◽  
High Strength ◽  
Self Healing ◽  
Potential Applications ◽  
Physical Blending

A high-stretchability, high-strength, tear-resistant, self-healing and adhesive elastomer is prepared through a facile and effective physical blending strategy. The elastomer shows potential applications in e-skin devices.

Bicomponent multifilament yarns of recycled poly(ethylene terephthalate) and nano-titanium dioxide for antibacterial carpet

2021 ◽  
pp. 152808372110117
Author(s):  
Sommai Pivsa-Art ◽  
Komson Sunyikhan ◽  
Weraporn Pivsa-Art
Keyword(s):  
Antibacterial Activity ◽  
Titanium Dioxide ◽  
Ethylene Terephthalate ◽  
Antibacterial Properties ◽  
Nano Structure ◽  
Elongation At Break ◽  
High Antibacterial Activity ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Multifilament Yarns

Recycled poly(ethylene terephthalate) (RPET) multifilament yarns are used in carpet manufacturing as a way to reduce plastic waste. The conventional RPET carpet is however susceptible to bacterial accumulation. As a result, this research experimentally doped RPET with nano-structure titanium dioxide (nano-TiO2) to produce RPET/nano-TiO2 bicomponent multifilament yarns with antibacterial property. The experimental multifilament yarn structure consisted of two parts: neat RPET core and RPET/nano-TiO2 shell. The nano-TiO2 content in the shell was varied between 1 and 3 wt% and the core/shell (C/S) ratios between 90/10, 70/30, and 50/50 w/w. The effects of C/S ratio and nano-TiO2 content on the mechanical and antibacterial properties of bicomponent multifilament yarns were determined. The experimental results indicated that the C/S ratio had no effect on the tenacity and elongation at break. Meanwhile, the tenacity and elongation at break of bicomponent fibers increased with nano-TiO2 content in the shell. The TiO2-doped RPET bicomponent yarns effectively inhibited the growth of Escherichia coli and Staphylococcus aureus. The 90/10 bicomponent multifilament fiber with 3 wt% TiO2 achieved the highest antibacterial activity. The very high antibacterial activity was attributable to greater deposition of nano-TiO2 particles near and on the shell surface.

scholarly journals Monomyristin and Monopalmitin Derivatives: Synthesis and Evaluation as Potential Antibacterial and Antifungal Agents

Molecules ◽  
2018 ◽  
Vol 23 (12) ◽  
pp. 3141 ◽  
Author(s):  
Jumina ◽  
Asma Nurmala ◽  
Anggit Fitria ◽  
Deni Pranowo ◽  
Eti Sholikhah ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Positive Control ◽  
Antifungal Activities ◽  
Amberlyst 15 ◽  
Antibacterial And Antifungal Activities ◽  
High Antibacterial Activity ◽  
Carbon Chains ◽  
Acyl Position ◽  
Antibacterial And Antifungal ◽  
Isopropylidene Glycerol

In the present work, monoacylglycerol derivatives, i.e., 1-monomyristin, 2-monomyristin, and 2-monopalmitin were successfully prepared from commercially available myristic acid and palmitic acid. The 1-monomyristin compound was prepared through a transesterification reaction between ethyl myristate and 1,2-O-isopropylidene glycerol, which was obtained from the protection of glycerol with acetone, then followed by deprotection using Amberlyst-15. On the other hand, 2-monoacylglycerol derivatives were prepared through enzymatic hydrolysis of triglycerides in the presence of Thermomyces lanuginosa lipase enzymes. The synthesized products were analyzed using fourier transform infrared (FTIR) spectrophotometer, gas or liquid chromatography-mass spectrometer (GC-MS or LC-MS), and proton and carbon nuclear magnetic resonance (1H- and 13C-NMR) spectrometers. It was found that monomyristin showed high antibacterial and antifungal activities, while 2-monopalmitin did not show any activity at all. The 1-monomyristin compound showed higher antibacterial activity against Staphylococcus aureus and Aggregatibacter actinomycetemcomitans and also higher antifungal activity against Candida albicans compared to the positive control. Meanwhile, 2-monomyristin showed high antibacterial activity against Escherichia coli. The effect of the acyl position and carbon chains towards antibacterial and antifungal activities was discussed.

Wafer-Scale Arrays of Nonvolatile Polymer Memories with Microprinted Semiconducting Small Molecule/Polymer Blends

2013 ◽  
Vol 5 (21) ◽  
pp. 10696-10704 ◽  
Author(s):  
Insung Bae ◽  
Sun Kak Hwang ◽  
Richard Hahnkee Kim ◽  
Seok Ju Kang ◽  
Cheolmin Park
Keyword(s):  
Polymer Blends ◽  
Small Molecule ◽  
Wafer Scale
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