Valorization of Brewery Wastes for the Synthesis of Silver Nanocomposites Containing Orthophosphate

Brewery wastes from stage 5 (Wort precipitate: BW5) and stage 7 (Brewer’s spent yeast: BW7) were valorized for the synthesis of silver phosphate nanocomposites. Nanoparticles were synthesized by converting silver salt in the presence of brewery wastes at different temperatures (25, 50, and 80 °C) and times (10, 30, and 120 min). Unexpectedly, BW7 yielded Ag3PO4 nanoparticles with minor contents of AgCl and Ag metal (Agmet). Contrastingly, BW5 produced AgCl nanoparticles with minor amounts of Ag3PO4 and Agmet. Nanocomposites with different component ratios were obtained by simply varying the synthesis temperature and time. The morphology of the nanocomposites contained ball-like structures representative of Ag3PO4 and stacked layers and fused particles representing AgCl and Agmet. The capping on the nanoparticles contained organic groups from the brewery by-products, and the surface overlayer had a rich chemical composition. The organic overlayers on BW7 nanocomposites were thinner than those on BW5 nanocomposites. Notably, the nanocomposites exhibited high antibacterial activity against Escherichia coli ATCC 25922. The antibacterial activity was higher for BW7 nanocomposites due to a larger silver phosphate content in the composition and a thin organic overlayer. The growth of Agmet in the structure adversely affected the antimicrobial property of the nanocomposites.

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

International Journal of Pharmaceutical Sciences and Nanotechnology ◽

10.37285/ijpsn.2014.7.3.10 ◽

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.

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

Journal of Industrial Textiles ◽

10.1177/15280837211011774 ◽

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.

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Directing Photocatalytic Pathway to Exceedingly High Antibacterial Activity in Water by Functionalizing Holey Ultrathin Nanosheets of Graphitic Carbon Nitride

Water Research ◽

10.1016/j.watres.2021.117125 ◽

2021 ◽

pp. 117125

Author(s):

Jun Xiao ◽

Qiang Liu ◽

Mian Song ◽

Xiangrong Li ◽

Qi Li ◽

...

Keyword(s):

Antibacterial Activity ◽

Carbon Nitride ◽

Graphitic Carbon ◽

Graphitic Carbon Nitride ◽

Ultrathin Nanosheets ◽

High Antibacterial Activity

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

Molecules ◽

10.3390/molecules23123141 ◽

2018 ◽

Vol 23 (12) ◽

pp. 3141 ◽

Cited By ~ 6

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.

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Facile loading of Ag nanoparticles onto magnetic microsphere by the aid of a tannic acid—Metal polymer layer to synthesize magnetic disinfectant with high antibacterial activity

Journal of Hazardous Materials ◽

10.1016/j.jhazmat.2017.08.047 ◽

2018 ◽

Vol 342 ◽

pp. 392-400 ◽

Cited By ~ 16

Author(s):

Tao Wang ◽

Binbin Ma ◽

Awei Jin ◽

Xiaogang Li ◽

Xiaole Zhang ◽

...

Keyword(s):

Antibacterial Activity ◽

Tannic Acid ◽

Ag Nanoparticles ◽

Polymer Layer ◽

Magnetic Microsphere ◽

High Antibacterial Activity ◽

Metal Polymer

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A smart aminoglycoside hydrogel with tunable gel degradation, on-demand drug release, and high antibacterial activity

Journal of Controlled Release ◽

10.1016/j.jconrel.2017.01.003 ◽

2017 ◽

Vol 247 ◽

pp. 145-152 ◽

Cited By ~ 60

Author(s):

Jingjing Hu ◽

Yanchun Quan ◽

Yuping Lai ◽

Zhao Zheng ◽

Zhiqi Hu ◽

...

Keyword(s):

Antibacterial Activity ◽

Drug Release ◽

On Demand ◽

High Antibacterial Activity

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Isolation of Enterococcus Species from Food Sources and Its Antibacterial Activity against Staphylococcus Aureus

Iraqi Journal of Science ◽

10.24996/ijs.2020.61.12.3 ◽

2020 ◽

pp. 3164-3171

Author(s):

Andalus S. Atiyah ◽

Marwa H. Alkhafaji

Keyword(s):

Staphylococcus Aureus ◽

Antibacterial Activity ◽

Dairy Products ◽

Food Samples ◽

Food Sources ◽

Enterococcus Spp ◽

Microbial Defense ◽

Prevalent Species ◽

Different Sources ◽

By Products

The microbial production of substances that have the ability to inhibit the growth of other microorganisms is possibly the most common defense strategy developed in nature. Microorganisms produce a variable collection of microbial defense systems, which include antibiotics, metabolic by-products, lytic agents, bacteriocins and others. The aim of the present study was to isolate and identify Enterococcus spp. and its most prevalent species from food samples and determine its antibacterial activity against Staphylococcus aureus isolates. A total of 50 food samples from different sources (dairy products (20 samples) and vegetables and fish (15 samples each)) were collected from different local markets in Baghdad and cultured. Enterococcus spp were isolated from only 32 food samples. E. faecium was the most predominant species which was recovered from 20 samples (62.5 %), 10 dairies, 7 vegetables, and 2 fish. E. faecalis was found in 8 samples (25 %), 5 vegetables and 3 fish. E. avium was recovered 6.25% as well as E. gallinarium (2 samples for each) Enterococcus avium were all isolated from dairy products but Enterococcus gallinarium one sample isolated from dairies and the other from fish. This study indicates the presence of Enterococcus spp. in the food samples and the ability of these bacteria to produce antibacterial substances which are active against closely related clinical isolates.

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