Sustainable dyeing of cotton, silk and leather using natural dye from Bixa orellana seeds: extraction, optimization and assessment of antibacterial activity

IntroductionNatural dyes offer an eco-friendly alternative to synthetic colorants in textile processing. This study explores the sustainable dyeing of cotton, silk, and leather using pigment-rich extracts from Bixa orellana seeds, with a focus on process optimization and antibacterial efficacy.Materials and methodsUsing an array of extraction solvents [water, methanol, ethanol, ethanol: methanol (1:1)] and extraction techniques [direct heat (DH), ultrasonic water bath (USB), ultrasonic probe, (USP)], Bixa orellana seeds were utilized to produce a yellow-orange dye. The color strength of the extracted dye was investigated using a UV-Visible spectrophotometer to measure the absorbance wavelength. The functional groups identified in the extracted natural dye were described using an FTIR spectrophotometer.Results and discussionUsing methanol as the solvent and 5 g of seed at 60°C for 60 min, the highest color yield was observed in USB. Using the ultrasonic water bath dyeing method at 60°C for 40 min without using any moderant, cotton, silk fabric, and leather were effectively colored in a yellow-orange color. The L*, a*, and b* values of the dyed material treated using the USB approach were 80.95, 4.52, 75.35 for cotton, 88.65, -1.35, 62.85 for silk, and 79.55, 015.35, 66.45 for leather, respectively. Compared to the other bacterial reduction, 85.25% of the colored materials showed substantial antibacterial action against Staphylococcus sp. Vibrio sp. (76.69%), Pseudomonas sp. (75.83%), Klebsiella sp. (74.24%), and Micrococcus sp. (74.21%) were the following most prevalent bacteria. The ultraviolet protection factor (UPF) measurements showed that leather and cotton treated with B. orellana seed dye had higher UV radiation shielding properties

Green synthesis of silver nanoparticles using Illicium verum extract: Optimization and characterization for biomedical applications

GREEN SYNTHESIS OF SILVER NANOPARTICLES USING ILLICIUM VERUM EXTRACT: OPTIMIZATION AND CHARACTERIZATION FOR BIOMEDICAL APPLICATIONS Green processing & synthesis (Rights reserved) (-) Green synthesis of silver nanoparticles using Illicium verum extract: Optimization and characterization for biomedical applications / Velmurugan, Palanivel (CC BY) (-

Tabebuia rosea seed extract mediated synthesis of silver nanoparticles with antibacterial, antioxidant, and antiproliferative activities

The green synthesis of silver nanoparticles (AgNPs) using plants has grown in significance recently. The present investigation involved the synthesis of AgNPs utilizing Tabebuia rosea (TR) seeds as a reducing agent. The bioactive potential of the synthesized AgNP was evaluated through antibacterial, antioxidant, and cytotoxicity assays. The confirmation of the formation of AgNPs was achieved through the utilization of UV–vis spectroscopy. The spectroscopic analysis revealed the presence of absorption maxima at 450 nm, which is a distinctive feature of AgNPs. The optimization process for the synthesis of nanoparticles was conducted by varying the pH levels, metal ion (AgNO _3 ), and substrate (Seed extract). The size range of the synthesized nanoparticles was found to be less than 100 nm through the use of scanning electron microscopy (SEM). The profile obtained through energy dispersive x-ray spectroscopy (EDX) analysis of AgNPs exhibited a characteristic optical absorption peak at approximately 3 keV. Further investigation using Fourier transform infrared (FTIR) spectroscopy revealed the involvement of O–H stretching in phenolic compounds and O–H and C=O stretching in carboxylic acids forming AgNPs. The results of the antimicrobial activity assay indicate that the bacteria K. pneumonia exhibited the maximum inhibition zone of 20 ± 0.48 mm, followed by E. faecalis , P. aeruginosa , P. mirabilis , and S. aureus at the highest concentration of 100 mg ml ^−1 , respectively. The DPPH assay findings suggest that the maximum concentration of 500 μ g ml ^−1 of AgNPs exhibited a unique scavenging ability, with a value of 80.98%. Additionally, the application of biologically synthesized AgNPs to treated cells resulted in a cytotoxic effect. The inhibitory concentration (IC _50 ) value of 45   μ g ml ^−1 was determined following a 24 h treatment with human fibroblast cells (L929). Using T. rosea seed to produce AgNPs holds promise for their potential application as nano drugs

Phytocrystallization of silver nanoparticles using Cassia alata flower extract for effective control of fungal skin pathogens

A feasible alternative to classic chemical synthesis, the phyto-mediated production of silver nanoparticles (AgNPs) utilizing aqueous flower petal extract of Cassia alata as a reducing agent is reported for the first time. Characterization of synthesized AgNPs was carried out using various techniques viz., ultraviolet-visible spectroscopy (UV-Vis), X-ray powder diffraction (XRD), high-resolution transmission electron microscope (HRTEM), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) with energy dispersive X-ray analysis (EDX). The results of the FTIR research conducted in this study show different bond stretches with varying durations, which can be seen at various faraway points. AgNPs are mainly spherical and vary in size from 20 to 100 nm, according to TEM images. The highest X-ray energy surge, at 3 keV, is visible in the EDX spectrum. The XRD pattern showed that four diffraction peaks could be assigned to the 111, 200, 220, and 311 planes of the face-centered cubic crystalline silver, respectively, at 32.05, 46.27, 55.25, and 57.39°. Optimization of production parameters including pH, metal ion concentration, and substrate concentrations were studied. In addition, the bioactivity was evaluated against Trichophyton rubrum, Aspergillus fumigatus, Candida albicans, Epidermophyton floccosum, and Mucor sp. using the agar diffusion method. Furthermore, their antioxidant properties were assessed using 2,2-diphenyl-1-picryl-hydrazyl-hydrate assay and ferric ion reducing antioxidant power tests. MTT assay was performed using human fibroblast cell line (L929) to determine the cell viability and cytotoxicity through increased metabolism of the tetrazolium salt

Nanoscale molecular reactions in microbiological medicines in modern medical applications

Everything around us is made up of atoms and molecules. The properties of quantum atoms are sought to understand the behavior of a particular object. But with the advent of research, it was discovered that there is a quantity smaller than the molecular size. The nanoscale measures a fraction of a billionth of a meter. The atom of an object measures 0.1 nm. Since atoms are the building blocks of matter, at the nanoscale one can combine these atoms to create new materials. The proposed model displays the properties of these nano-scale elements in modern medical applications. The nano-scale research of matter is fascinating because it is the basic phase in which atoms are held together. Therefore, by manipulating material at this level, one can create many different types of objects. This proposed model calculates the operation requirements and expects the results. Based on the operational requirements, the proposed model provides the suggestions. This will be helpful for the medical researchers to identify the proper medical treatments based on the microbiological requirements