scholarly journals Psidium guajava Leave Extract for Improving Ultraviolet Protection and Antibacterial Properties of Cellulosic Fabrics

2021 ◽  
Vol 12 (3) ◽  
pp. 3811-3835
Keyword(s):  
Silver Nanoparticles ◽  
Antioxidant Properties ◽  
Antibacterial Properties ◽  
High Sensitivity ◽  
Psidium Guajava ◽  
Cotton Fabrics ◽  
Total Phenol Content ◽  
Medical Field ◽  
Gram Positive Bacteria ◽  
Ultraviolet Protection

Nowadays, many types of research are looking for natural products to be used in several applications, particularly in the medical field. Psidium guajava Leave Extract was therefore used to impart multi-functional properties to cotton fabrics, such as antibacterial and antioxidant properties, in addition to ultraviolet protection. Two solvents have been used for the preparation of the extract, namely water, and ethanol. Both prepared extracts were used as a reducing and stabilizing agent in the synthesis of silver nanoparticles. Prepared extracts and synthesized nanoparticles have been characterized using a variety of techniques, such as total phenol content, antioxidant activity, particle size, FTIR, and TEM, and these techniques provide the extraction and synthesis of silver nanoparticles. The optimization of the treatment condition of cotton fabrics was evaluated at different concentrations, pH, time, and temperature. The assessment shows that the optimum condition for the treated cotton fabric has been achieved by using 100% of the extract at pH 8 for 15 min at 70°C. Monitoring was assessed as a UPF value. Antimicrobial results for treated tissues showed that Gram-negative bacteria showed less sensitivity to both extracts than Gram-positive bacteria, while fungal strains showed high sensitivity to both extracts. The antioxidant properties of the treated fabrics may also improve, allowing them to be considered in medical applications.

scholarly journals Synthesis of Antibacterial Coating Using Chitosan, Polyethylene Glycol and Silver Nanoparticles and Investigation of Their Antibacterial Properties

2021 ◽  
Vol 13 (1) ◽  
pp. 1-9
Author(s):  
Saba Qureyshi ◽  
Zaman Sajid
Keyword(s):  
Silver Nanoparticles ◽  
Polyethylene Glycol ◽  
Agar Plate ◽  
Antibacterial Properties ◽  
Cotton Cloth ◽  
Synthesis Of Nanoparticles ◽  
Antibacterial Coating ◽  
Gram Positive Bacteria ◽  
Multiple Components ◽  
Coated Fabrics

Chitosan/ Polyethylene glycol and silver nanoparticles based antibacterial coating has been synthesized and applied to cotton cloth using sonochemical technique. In addition to the synthesis of nanoparticles using Pyrus seed extract (Green synthesis), Chitosan and PEG compound has also been used to develop the coating in this research. The coating obtained with this compound possesses good antibacterial properties and results. The study shows that the coated fabrics and silver nanoparticles show highly potent antibacterial activity towards gram negative and gram-positive bacteria. A comparison of coating with single and multiple components is studied; specifically, a comparison of pure chitosan and polyethylene glycol coating with their blend is studied. Agar plate test is performed against pseudomonas aeruginosa, Acinetobacter baumannii and methicillin-resistant staphylococcus aureus (MRSA), and the proposed process is helpful in healthcare industry and specified applications.

scholarly journals Evaluation of the Antibacterial Properties of the Hydro-Ethanolic Leaf and Stembark of Psidium guajava (Myrtaceae) on Cariogenic and Periodontopathic Bacteria

2021 ◽  
pp. 34-49
Author(s):  
Fowedlung Ngufor Agafina ◽  
Ashu Michael Agbor ◽  
Fotsing Kwetche Pierre René ◽  
Tembe Fokunang Estella ◽  
Pilipili Charles ◽  
...  
Keyword(s):  
Bacterial Resistance ◽  
Periodontal Diseases ◽  
Financial Burden ◽  
Antibacterial Properties ◽  
Stem Bark ◽  
Psidium Guajava ◽  
Total Phenol Content ◽  
Phytochemical Screening ◽  
Coarse Powder ◽  
Periodontopathic Bacteria

Background: Caries and periodontal diseases are major public health problems. Due to increase in bacterial resistance to antibiotics, there is a need to promote the known potential of plants and search for new anti-infectious substances as therapeutic alternatives to antibiotics. Aims: This study was aimed at evaluating the antibacterial property of the hydro-ethanolic leaf and stem bark extracts of Psidium guajava on cariogenic and periodontopathic bacteria. Methodology: This was an experimental study that took place in the Laboratory of Chemistry and Microbiology (Clinique Universitaires des Montagne (CUM)) of Bangangté between January to June 2020. They were dried in shade for 3 weeks and ground to obtain a coarse powder. The dried powders were macerated for 72 hours in a water-ethanol mixture (30:70). Then, the phytochemical screening and quantification of the total polyphenol content followed. Microdilutions were used to determine the minimum inhibitory concentrations (MIC) of guava. Müller Hinton agar was used for obtaining the minimum bactericidal concentrations (MBC) and the determination of inhibition diameters of the bacteria. Results: Extraction yields of 17.36g and 42.55g were obtained for leaf and stem bark, respectively. The phytochemical screening revealed the presence of various secondary metabolites among which the total phenol content was quantified at 236.1878 and 255.7682 mg equivalent of gallic acid per gram for leaf and stem bark, respectively. The carious bacteria isolated were: Streptococcus mutans, Actinomycetes viscosus and Lactobacillus acidophilus.While, the periodontal bacteria were: Actinobacillus actinomycetemcomitans, Porphyromonas gingivalis, Prevotella intermedia, Fusobacterium nucleatum ,Tannerella forsythensis. The results obtained showed that the combined extracts of leaf and stem bark had an activity higher than that of the stem bark which in turn had a higher activity than the leaves.  Conclusion: Non-invasive independent predictors for screening esophageal varices may decrease medical as well as financial burden, hence improving the management of cirrhotic patients. These predictors, however, need further work to validate reliability.

scholarly journals Antioxidant and Antibacterial Properties of Norway Spruce (Picea abies H. Karst.) and Eastern Hemlock (Tsuga canadensis (L.) Carrière) Cone Extracts

Forests ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1189
Author(s):  
Tamás Hofmann ◽  
Levente Albert ◽  
László Németh ◽  
Martina Vršanská ◽  
Nikola Schlosserová ◽  
...  
Keyword(s):  
Norway Spruce ◽  
Antioxidant Properties ◽  
Antibacterial Properties ◽  
Inhibitory Effect ◽  
Eastern Hemlock ◽  
Aureus Strain ◽  
Total Phenol Content ◽  
Frap Assay ◽  
Antioxidant Efficiency ◽  
Antioxidant Power

According to recent studies, Norway spruce cones and eastern hemlock cones possess exceptionally high antioxidant capacities; however, the antioxidant efficiency of extractives and their bioactive effects have yet to be investigated in detail. The present article utilizes state-of-the art analytical chemical methodology and chemometric evaluation to reveal cone extractives with the highest antioxidant potential, accounting for possible bioactive effects. Antioxidant properties were determined by the Ferric reducing antioxidant power (FRAP) assay and the Folin–Ciocalteu’s total phenol content (TPC) assay. Structure and relative polyphenol concentrations were determined using liquid chromatography/diode array detection/tandem mass spectrometry. The antibacterial testing was conducted using Staphylococcus aureus and Escherichia coli strains. Using correlation analysis and factor analysis, a scoring evaluation was implemented to determine and compare the antioxidant efficiency of extractives. In Norway spruce, piceatannol-O-hexoside and coumaric acid derivatives were found to be the most powerful antioxidants, while in eastern hemlock, kaempferol glycosides were the most powerful. The antibacterial test did not show any promising antimicrobial activity against E. coli, although a visible inhibitory effect on S. aureus strain was observed.

scholarly journals Antibacterial activity of silver nanoparticles-Clinacanthus nutans (AgNP-CN) against Streptococcus mutans

2020 ◽  
Vol 11 (SPL4) ◽  
pp. 1019-1024
Author(s):  
Siti Aisyah Abd Ghafar ◽  
Nor Baitie Adura Mohd Fudzi ◽  
Wan Nur Farhanah Wan Sulaiman ◽  
Lim Vuanghao ◽  
Rohazila Mohamad Hanafiah
Keyword(s):  
Silver Nanoparticles ◽  
Streptococcus Mutans ◽  
Antioxidant Properties ◽  
Antibacterial Properties ◽  
Brain Heart Infusion ◽  
Minimal Bactericidal Concentration ◽  
Disc Diffusion ◽  
Disc Diffusion Assay ◽  
Clinacanthus Nutans ◽  
Diffusion Assay

Clinacanthus nutans was found to possess anti-venom, anti-inflammatory, analgesic, anti- diabetic, anti-rheumatism, antiviral and antioxidant properties. Silver nanoparticles are nanoparticles between 1nm to 100nm in size and play significant role in medicinal fields. Silver nanoparticles exhibit unique properties, such as excellent conductivity, chemical stability, catalytic and antimicrobial activity. Streptococcus mutans is usually discovered in human oral cavity and the main aetiological of tooth decay. There is no study on antibacterial effect of silver nanoparticles Clinacanthus nutans (AgNP-CN) against Streptococcus mutans reported to date. Therefore, objective of this study is to investigate antibacterial properties of silver nanoparticles Clinacanthus nutans against Streptococcus mutans. Streptococcus mutans was subcultured in brain heart infusion (BHI) broth and agar. AgNP-CN with different concentrations was tested against Streptococcus mutans via disc diffusion assay, minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC). Amoxicillin was used as positive control while DMSO and blank silver nanoparticles were used as negative control. Disc diffusion assay shows AgNP-CN inhibit Streptococcus mutans growth. AgNP-CN shows the greatest inhibition properties (15.3±1.53 mm) in comparison to Clinacanthus nutans leaves extract (6.0±0.01 mm) and blank silver nanoparticles (6.0±0.01 mm). MIC value for AgNP-CN is 2.5±0.01 mg/mL while amoxicillin is 0.007±0.01 mg/mL. Whereas MBC values for AgNP-CN is 2.5 mg/mL. Results are concentration dependent, with higher concentration shows better inhibition property. It can be concluded AgNP-CN possesses bactericidal properties against Streptococcus mutans.

scholarly journals Multifunction Finishing of Cellulose Based Fabrics via 3-Chloro-2-Hydroxypropyl Trimethyl Ammonium Chloride (Quat-188) and Silver Nanoparticles (AgNPs) to Improve its Dyeability and Antibacterial

2020 ◽  
Vol 11 (4) ◽  
pp. 11666-11678
Keyword(s):  
Silver Nanoparticles ◽  
Antibacterial Activity ◽  
Antibacterial Properties ◽  
Cotton Fabrics ◽  
Diffusion Method ◽  
Acid Dyes ◽  
Color Strength ◽  
Disk Diffusion Method ◽  
Dyeing Process ◽  
Colour Strength

The main goal of this study is to modify cotton as cellulose-based fabrics through cationization to improve its dyeing with acid dyes and its antibacterial. Quat-188 was applied to cotton to prepare cationized cotton, overcoming the negative charges between cotton and acid dyes during the dyeing process without using any electrolyte via the pad-dry-cure method. Then the cationized cotton fabrics were treated with the prepared silver nanoparticles to improve their antibacterial properties. The untreated and treated cotton fabrics were dyed with two acid dyes Acid Brilliant Blue PB 100% (acid blue 25; AB25) and Acid Metanil Yellow MT 100% (acid yellow 36) at concentrations of 2%, 4%, and 6% of by exhaust method. Colour strength, color, and washing fastness of untreated and treated cotton fabrics were studied. Antibacterial properties of fabrics were also evaluated against S. aureus and E. coli by using the disk diffusion method. Dyeing properties showed that the treated cotton fabrics significantly improved color strength and fastness properties (light, washing, perspiration, and rubbing). Also, the antibacterial properties of treated cotton fabrics showed antibacterial activity towards tested bacteria. This study reveals that modified cotton fabrics via cationization with Quat-188 and AgNPs have multifunctional properties from their ability for acid dyes and their higher antibacterial activity towards Gram-positive and Gram-negative bacteria that is can be used in many applications.

scholarly journals Cytotoxic activity of silver nanoparticles prepared from Psidium guajava L. (Myrtaceae) and Lawsonia inermis L. (Lythraceae) extracts

2021 ◽  
Vol 20 (9) ◽  
pp. 1791-1799
Author(s):  
Fatma M. Abdel Bar ◽  
Mohamed M Abu Habib ◽  
Fardous F. El-Senduny ◽  
Farid A. Badria
Keyword(s):  
Silver Nanoparticles ◽  
Cytotoxic Activity ◽  
Antioxidant Properties ◽  
Psidium Guajava ◽  
Cytotoxic Activities ◽  
Phytochemical Analysis ◽  
Lawsonia Inermis ◽  
Leaf Extracts ◽  
Cancer Treatments ◽  
Transmission Electron

Purpose: To biosynthesize silver nanoparticles (AgNPs) using Psidium guajava L. and Lawsonia inermis L. leaf extracts, and investigate their antioxidant and cytotoxic activities.Methods: The aqueous extracts were prepared by maceration in distilled H2O followed by partitioning with EtOAc. AgNPs were prepared by treating the extracts with 1 mM AgNO3 and then were characterized by UV-vis and FTIR analyses, and transmission electron microscopy (TEM). MTT cytotoxicity and 2,2`-azinobis(3-ethylbenzothiazoline-6-sulphonic acid (ABTS) antioxidant assays were used to assess their cytotoxic and antioxidant properties, respectively.Results: AgNPs from P. guajava and L. inermis extracts exhibited good morphological stability and showed moderate antioxidant activity (68.1 and 71.9%, respectively) compared to their extracts. Equipotent cytotoxicity against HCT-116 and MCF-7 cells was observed for AgNPs derived from P.guajava, while AgNPs derived from L. inermis possessed two-fold cytotoxicity compared to their corresponding extracts. Phytochemical analysis of P. guajava afforded pyrogallol, quercetin, quercetin-3-O-β-xylopyranoside, quercetin-3-O-β-arabinopyranoside, and quercetin-3-O-α-rabinofuranoside, while L. inermis afforded lawsone and luteolin.Conclusion: Flavonoids and phenolics play a major role in reducing Ag+ ions, surface coating, antioxidant, and cytotoxic activities of AgNPs. The biocompatible AgNPs produced by L. inermis demonstrate promising cytotoxic activity that could contribute to new cancer treatments.

scholarly journals Antioxidant and Antibacterial Potential of Silver Nanoparticles: Biogenic Synthesis Utilizing Apple Extract

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Upendra Nagaich ◽  
Neha Gulati ◽  
Swati Chauhan
Keyword(s):  
Silver Nanoparticles ◽  
Ex Vivo ◽  
Uv Spectroscopy ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Antibacterial Properties ◽  
Confirmatory Test ◽  
E Coli ◽  
Electron Microscope Image

The advancement of the biological production of nanoparticles using herbal extracts performs a significant role in nanotechnology discipline as it is green and does not engage harsh chemicals. The objective of the present investigation was to extract flavonoids in the mode of apple extract and synthesize its silver nanoparticles and ultimately nanoparticles loading into hydrogels. The presence of flavonoids in apple extract was characterized by preliminary testing like dil. ammonia test and confirmatory test by magnesium ribbon test. The synthesized silver nanoparticles were characterized using UV spectroscopy, particle size and surface morphology, and zeta potential. Silver nanoparticles loaded hydrogels were evaluated for physical appearance, pH, viscosity, spreadability, porosity, in vitro release, ex vivo permeation, and antibacterial (E. coli and S. aureus) and antioxidant studies (DPPH radical scavenging assay). Well dispersed silver nanoparticles below were observed in scanning electron microscope image. Hydrogels displayed in vitro release of 98.01%  ±  0.37% up to 24 h and ex vivo permeation of 98.81  ±  0.24% up to 24 h. Hydrogel effectively inhibited the growth of both microorganism indicating good antibacterial properties. The value of percent radical inhibition was 75.16%  ±  0.04 revealing its high antioxidant properties. As an outcome, it can be concluded that antioxidant and antiageing traits of flavonoids in apple extract plus biocidal feature of silver nanoparticles can be synergistically and successfully utilized in the form of hydrogel.

scholarly journals Antibacterial finishing of a dyed cotton fabrics using diospyros mespiliformis leaves extracts

2017 ◽  
Vol 13 (3) ◽  
Author(s):  
Sulaiman Balarabe ◽  
Shehu Habibu ◽  
Sani Muhammad Gumel ◽  
Magaji Ladan ◽  
Abdullahi Haruna Birniwa ◽  
...  
Keyword(s):  
Ethyl Acetate ◽  
Antibacterial Properties ◽  
Petri Dish ◽  
Cotton Fabrics ◽  
Diffusion Method ◽  
Significant Activity ◽  
Fastness Properties ◽  
Gram Positive Bacteria ◽  
Micro Organisms ◽  
And Staphylococcus Aureus

In this study, leaves of Diospyros mespiliformis was extracted using ethanol and macerated with chloroform and ethyl acetate and later screened for antibacterial  properties. The antibacterial analysis was performed qualitatively via disc diffusion method (AATCC 147) against Escherichia coli and Staphylococcus aureus as gram negative and gram positive bacteria respectively. The extract shows a significant activity on the isolated micro-organisms as evidenced by a clear zone of inhibition, more so in the ethyl acetate petri dish indicating its potentials in preventing microbial growth. The extract was then used to dye cotton fabrics by pre-mordanting, simultaneous mordanting and post-mordanting processes. The materials were assessed for fastness properties, such as fastness to washing, light, pressing and rubbing based on AATCC standards. The results show a good to moderate fastness properties suggesting that extract of Diospyros mespiliformis can be successfully used for dyeing of cotton fabric in textile industries thereby reducing the pollution and environmental hazards associated with the use of conventional synthetic chemical dyes.

scholarly journals One Step Photopolymerization of N, N-Methylene Diacrylamide and Photocuring of Carboxymethyl Starch-Silver Nanoparticles onto Cotton Fabrics for Durable Antibacterial Finishing

2014 ◽  
Vol 2014 ◽  
pp. 1-9 ◽  
Author(s):  
M. A. El-Sheikh ◽  
H. M. Ibrahim
Keyword(s):  
Silver Nanoparticles ◽  
Irradiation Time ◽  
Antibacterial Properties ◽  
Inhibition Zone ◽  
Cotton Fabrics ◽  
Wall Structure ◽  
E Coli ◽  
Carboxymethyl Starch ◽  
Antibacterial Performance ◽  
Before And After

The PI/UV system ((4-trimethyl ammonium methyl) benzophenone chloride/UV) was used to synthesize carboxymethyl starch- (CMS-) stabilized silver nanoparticles (AgNPs). AgNPs so prepared had round shape morphology with size of 1–7 nm. The prepared AgNPs were utilized to impart antibacterial finishing for cotton fabrics. The PI/UV system was further utilized to fix AgNPs onto cotton fabrics by photocrosslinking of AgNPs-CMS composite onto cotton fabrics to impart durable antibacterial properties. Effect of irradiation time and incorporating N, N-methylene diacrylamide (MDA) in different concentrations on antibacterial performance before and after repeated washing cycles was studied. S. aureus and E. coli were used to evaluate the antibacterial performance of finished fabrics. The antibacterial performance was directly proportional to the irradiation time and concentration of MDA but inversely proportional to the number of washing cycles. The inhibition zone of S. aureus and E. coli is the same although they are different in the cell wall structure and mode of action due to the nanosize structure formed.

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